:root{color:#253247;font-synthesis:none;--blue:#2568dd;--ink:#243247;--muted:#7b8799;--line:#e8edf5;--surface:#fff;--radius:18px;background:#f6f8fc;font-family:Inter,-apple-system,BlinkMacSystemFont,Segoe UI,PingFang SC,Microsoft YaHei,sans-serif;font-size:14px;font-weight:400;line-height:1.6}*{box-sizing:border-box}body{margin:0}button,input,textarea,select{font:inherit}button,a,input,select,textarea{-webkit-tap-highlight-color:transparent}button{cursor:pointer}button:disabled{cursor:not-allowed;opacity:.5}a{color:inherit;text-decoration:none}button{color:inherit;background:0 0;border:0}input,select,textarea{color:var(--ink);background:#fff;border:1px solid #dfe5ee;border-radius:10px;max-width:100%;min-height:42px;padding:10px 12px}textarea{resize:vertical;line-height:1.7}input:focus,select:focus,textarea:focus{outline-offset:1px;border-color:var(--blue);outline:2px solid #a4c4fb}input[type=checkbox]{accent-color:var(--blue);width:16px;height:16px;min-height:16px;margin:0}input[type=range]{accent-color:var(--blue);padding:0}input[type=color]{padding:4px}h1,h2,h3,p{margin-top:0}h1{letter-spacing:-.8px;margin-bottom:10px;font-size:30px;font-weight:650;line-height:1.4}h2{margin-bottom:14px;font-size:19px;font-weight:650;line-height:1.5}h3{margin-bottom:12px;font-size:16px;font-weight:600}p{margin-bottom:14px}small{font-size:12px}svg{flex-shrink:0}::selection{background:#cfe0ff}.button{background:var(--blue);color:#fff;white-space:nowrap;border:1px solid #0000;border-radius:10px;justify-content:center;align-items:center;gap:8px;min-height:42px;padding:11px 18px;font-size:13px;font-weight:550;transition:background .15s,box-shadow .15s;display:inline-flex}.button:hover{background:#1859c5;box-shadow:0 3px 10px #2568dd19}.button.secondary{color:#44526a;background:#fff;border-color:#e0e6ef}.button.secondary:hover{background:#f7f9fd;border-color:#b9cbe5}.button.tinted{color:var(--blue);background:#eaf2ff}.button.large{min-height:48px;padding:14px 24px;font-size:14px}.button.full{width:100%}.text-link{color:var(--blue);align-items:center;gap:5px;padding:3px 0;font-size:13px;font-weight:500;display:inline-flex}.text-link:hover{text-decoration:underline}.icon-button{color:#758195;border-radius:9px;justify-content:center;align-items:center;width:34px;min-width:34px;height:34px;padding:5px;display:inline-flex}.icon-button:hover{color:var(--blue);background:#edf3fb}.muted{color:var(--muted)}.small{font-size:12px}.center{text-align:center}.danger{color:#c04d49!important}.spaced{margin-top:20px}.brand{flex-shrink:0;align-items:center;gap:11px;display:flex}.brand-mark{object-fit:contain;flex-shrink:0;width:39px;height:39px;display:block}.brand>span:last-child{letter-spacing:.2px;font-size:20px;font-weight:650;line-height:1.25}.brand small{letter-spacing:1.6px;color:#93a1b4;margin-top:3px;font-size:10px;font-weight:500;display:block}.eyebrow{letter-spacing:1px;color:#8191a8;margin-bottom:13px;font-size:12px;font-weight:500}.pill,.chip,.status{color:#6d7d94;white-space:nowrap;background:#f1f5fb;border-radius:6px;align-items:center;padding:4px 9px;font-size:11px;line-height:1.5;display:inline-flex}.status.published,.status.done,.status.review{color:#258265;background:#edf8f2}.status.draft,.status.running,.status.processing{color:#af7e27;background:#fff6e4}.status.failed,.status.deleted{color:#b65555;background:#fceded}.status.hidden,.status.cancelled{color:#8d95a0;background:#edf0f4}.status.queued{color:#567ab5;background:#edf3fe}.note,.notice{color:#6880a0;background:#f0f5fd;border:1px solid #e0eafa;border-radius:11px;margin:16px 0;padding:13px 16px;font-size:12px;line-height:1.85}.notice{flex-wrap:wrap;align-items:center;gap:12px;display:flex}.notice small{width:100%}.notice a{color:var(--blue)}.error-box{color:#b34b45;white-space:pre-wrap;background:#fff0ef;border:1px solid #f6d3d0;border-radius:11px;margin:12px 0;padding:14px}.error-box button{color:inherit;margin-left:14px;text-decoration:underline}.toast{color:#fff;z-index:200;background:#244533;border-radius:12px;align-items:center;gap:20px;max-width:90vw;padding:13px 18px;display:flex;position:fixed;bottom:30px;left:50%;transform:translate(-50%);box-shadow:0 10px 40px #25324725}.toast.error{background:#8f3835}.toast button{color:#fff;font-size:21px}.field{flex-direction:column;gap:7px;min-width:0;margin:0 0 17px;display:flex}.field>span{color:#64728a;font-size:12px;font-weight:550}.field small{color:#95a0b1;font-size:11px;line-height:1.7}.field input,.field select,.field textarea{width:100%}.form-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:0 16px;display:grid}.check-label{cursor:pointer;align-items:center;gap:9px;margin:12px 0;font-size:13px;display:flex}.inline-actions{flex-wrap:wrap;align-items:center;gap:10px;display:flex}.loading{color:#93a0b1;justify-content:center;align-items:center;gap:12px;min-height:180px;display:flex}.spin{animation:1.2s linear infinite spin}@keyframes spin{to{transform:rotate(360deg)}}.empty{text-align:center;color:#8996a8;padding:36px 24px}.empty h3{color:#64758b;margin-bottom:8px;font-size:15px}.empty p{max-width:430px;margin:0 auto 20px;font-size:12px;line-height:1.9}.empty-icon{color:#9eb4d6;background:#f0f4fb;border-radius:17px;justify-content:center;align-items:center;width:60px;height:60px;margin:0 auto 18px;display:flex}.modal-backdrop{z-index:100;-webkit-backdrop-filter:blur(3px);backdrop-filter:blur(3px);background:#26375055;justify-content:center;align-items:center;padding:25px;display:flex;position:fixed;inset:0}.modal{background:#fff;border-radius:22px;width:500px;max-width:100%;max-height:92vh;padding:26px;overflow:auto;box-shadow:0 22px 90px #142c4620}.modal.wide{width:960px}.modal>header{justify-content:space-between;align-items:center;margin-bottom:18px;display:flex}.modal>header h2{margin:0;font-size:20px}.modal-actions{justify-content:flex-end;align-items:center;gap:12px;margin-top:24px;display:flex}.contact-float{color:#5b7596;z-index:45;background:#fff;border:1px solid #e1e9f3;border-radius:24px;align-items:center;gap:8px;padding:10px 17px;font-size:12px;display:flex;position:fixed;bottom:23px;right:24px;box-shadow:0 3px 20px #4c648b12}.wechat-image{width:320px;max-width:100%;margin:20px auto;display:block}.tabs{border-bottom:1px solid var(--line);gap:5px;margin-bottom:24px;display:flex}.tabs button{color:#8490a2;border-bottom:2px solid #0000;padding:12px 19px;font-size:13px}.tabs button.active{color:var(--blue);border-color:var(--blue)}.panel{border:1px solid var(--line);border-radius:var(--radius);background:#fff;margin-bottom:22px;padding:25px}.panel h2>svg{vertical-align:middle;margin-right:7px}.panel-heading{justify-content:space-between;align-items:flex-start;gap:12px;margin-bottom:20px;display:flex}.panel-heading h2{margin-bottom:5px;font-size:16px}.panel-heading p{color:#9aa4b3;margin:0;font-size:11px}.panel-heading>svg{color:#91a5c2}.page-head{justify-content:space-between;align-items:center;gap:25px;margin:8px 0 30px;display:flex}.page-head p{color:#8b97a8;margin-bottom:0;font-size:13px}.head-actions{flex-shrink:0;align-items:center;gap:10px;display:flex}.subheading{margin:24px 0 16px;font-size:17px}.public-page{background:#fff}.public-header{justify-content:space-between;align-items:center;max-width:1260px;margin:auto;padding:26px 42px;display:flex}.public-header nav{color:#7e8b9e;align-items:center;gap:28px;font-size:13px;display:flex}.hero{grid-template-columns:1.2fr 1fr;align-items:center;gap:85px;max-width:1180px;margin:66px auto 90px;padding:25px 40px;display:grid}.hero h1{letter-spacing:-1.8px;margin-bottom:25px;font-size:49px;font-weight:650;line-height:1.42}.hero h1 span{color:var(--blue)}.hero p{color:#8b97a9;font-size:15px;line-height:2}.hero-actions{align-items:center;gap:25px;margin:30px 0 25px;display:flex}.hero-note{color:#97a3b3;align-items:center;gap:8px;font-size:11px;display:flex}.hero-note svg{color:#51a78a}.hero-board{background:#fcfdff;border:1px solid #e6edf6;border-radius:25px;padding:25px;transform:rotate(-2deg);box-shadow:0 20px 70px #526d8f0d}.board-top{align-items:center;gap:12px;margin-bottom:25px;font-size:14px;font-weight:550;display:flex}.board-top .brand-mark{width:33px;height:33px}.board-top .pill{margin-left:auto;font-size:9px}.sample-note{border-radius:15px;align-items:center;gap:17px;margin:12px 0;padding:23px 19px;display:flex}.sample-note strong{font-size:14px;font-weight:550}.sample-note p{color:#8998ad;margin:5px 0 0;font-size:11px;line-height:1.8}.sample-note.blue{color:#427bd0;background:#edf4ff}.sample-note.green{color:#4b987e;background:#edf7f1}.sample-note.yellow{color:#b8954a;background:#fcf6e9}.board-bottom{color:#93a0b1;justify-content:space-between;align-items:center;margin-top:25px;font-size:11px;display:flex}.features,.pricing{max-width:1260px;margin:auto;padding:65px 40px}.section-title{text-align:center;margin-bottom:40px}.section-title h2{letter-spacing:-.6px;font-size:30px;font-weight:600}.section-title p{color:#8b97a8;font-size:13px}.feature-grid{grid-template-columns:repeat(3,1fr);gap:28px;display:grid}.feature-grid article{background:#f8fafc;border-radius:20px;padding:28px;position:relative}.feature-icon{color:#7498ca;background:#fff;border:1px solid #e9eef5;border-radius:13px;justify-content:center;align-items:center;width:48px;height:48px;margin-bottom:27px;display:flex}.feature-grid article small{color:#c2cbd7;letter-spacing:1px;position:absolute;top:35px;right:30px}.feature-grid p{color:#98a2b0;margin-bottom:0;font-size:13px}.price-grid{grid-template-columns:repeat(4,1fr);gap:18px;display:grid}.price-card{border:1px solid #e7edf5;border-radius:19px;padding:25px 22px}.price-card.featured{background:#f7faff;border-color:#a6c5f8}.price-card h3{color:#63738b;margin-top:24px}.price{letter-spacing:-1.5px;font-size:42px;font-weight:600}.price>span{vertical-align:top;margin-right:4px;font-size:20px;line-height:2.5}.price>small{letter-spacing:0;color:#9ba6b5;font-size:11px;font-weight:400}.price-card ul{margin:25px 0;padding:0;list-style:none}.price-card li{color:#7f8da1;align-items:center;gap:7px;margin-bottom:13px;font-size:11px;display:flex}.price-card li svg{color:#6ea693}.price-card>.button{width:100%}.public-page>footer{border-top:1px solid var(--line);color:#97a4b6;justify-content:space-between;align-items:center;margin-top:40px;padding:38px 55px;font-size:12px;display:flex}.login-page{background:radial-gradient(at 75% 10%,#edf3ff,#0000 60%),#f8fafc;min-height:100vh;padding:35px}.login-card{background:#fff;border:1px solid #e5ecf6;border-radius:24px;width:430px;max-width:100%;margin:70px auto;padding:36px;box-shadow:0 15px 60px #627da20b}.login-card h1{font-size:27px}.login-card>p{margin-bottom:28px;font-size:12px}.login-card form{margin-top:30px}.login-card>.button{margin:5px 0}.login-card>.text-link{text-align:center;margin-top:15px;display:block}.login-help{text-align:center;color:#a0a9b6;line-height:1.9;margin:23px 0 12px!important}.app-shell{min-height:100vh;display:flex}.sidebar{border-right:1px solid var(--line);z-index:60;background:#fff;flex-direction:column;width:226px;padding:28px 18px 22px;display:flex;position:fixed;top:0;bottom:0;left:0}.sidebar>.brand{margin-bottom:34px;padding-left:13px}.sidebar .brand>span:last-child{font-size:19px}.sidebar .brand-mark{width:35px;height:35px}.create-button{border-radius:12px;justify-content:flex-start;margin:0 9px 27px;padding-left:23px;box-shadow:0 4px 12px #276bdd12}.sidebar nav{flex-direction:column;gap:6px;display:flex}.sidebar nav a{color:#8895a8;border-radius:11px;align-items:center;gap:14px;padding:12px 17px;font-size:13px;display:flex}.sidebar nav a:hover{background:#f7f9fd}.sidebar nav a.active{color:#306bd0;background:#eaf2ff;font-weight:550}.sidebar-bottom{margin-top:auto;padding:26px 12px 0}.sidebar-bottom>small{color:#a1abba;margin:8px 0 18px;font-size:11px;display:block}.sidebar-bottom .button{min-height:36px;padding:9px 12px;font-size:11px}.plan-label{color:#8090a6;align-items:center;gap:8px;font-size:11px;display:flex}.online-dot{background:#6eb697;border-radius:100%;width:6px;height:6px}.main-shell{width:calc(100% - 226px);min-width:0;margin-left:226px}.topbar{background:#f9fbfede;border-bottom:1px solid #eaf0f7;justify-content:space-between;align-items:center;height:77px;padding:0 39px;display:flex}.breadcrumb{color:#a2adbc;align-items:center;gap:11px;font-size:11px;display:flex}.breadcrumb span{color:#7c8ba1}.user-menu{color:#718097;align-items:center;gap:10px;font-size:12px;display:flex}.avatar{color:#5a84bb;background:#e7f0fd;border-radius:100%;flex-shrink:0;justify-content:center;align-items:center;width:31px;height:31px;font-size:12px;display:flex}.avatar.large{width:50px;height:50px;font-size:19px}.workspace{max-width:1600px;margin:auto;padding:28px 38px 90px}.mobile-menu{display:none}.membership-banner{color:#9e8147;background:#fff4dc;justify-content:space-between;align-items:center;padding:12px 30px;font-size:12px;display:flex}.membership-banner .button{min-height:30px;padding:5px 9px}.stat-grid{grid-template-columns:repeat(4,minmax(0,1fr));gap:18px;margin-bottom:25px;display:grid}.stat-card{background:#fff;border:1px solid #e6edf7;border-radius:16px;padding:21px 23px;transition:transform .2s}.stat-card:hover{transform:translateY(-2px)}.stat-card.blue{background:#edf4ff;border-color:#e3ecfb}.stat-card.orange{background:#fff8eb;border-color:#f6eedf}.stat-card.green{background:#edf7f1;border-color:#e2eee8}.stat-card.purple{background:#f1effb;border-color:#e9e5f7}.stat-label{color:#7e91ab;justify-content:space-between;align-items:center;font-size:12px;display:flex}.stat-label svg{opacity:.65}.stat-card>strong{letter-spacing:-1.2px;color:#344d6d;margin:13px 0 10px;font-size:35px;font-weight:550;line-height:1.5;display:block}.stat-card>span:last-child{color:#94a0b1;justify-content:space-between;align-items:center;font-size:10px;display:flex}.stat-card small{color:#8997ab;font-size:10px}.dashboard-middle{grid-template-columns:1.7fr 1fr;gap:23px;display:grid}.chart{height:215px;margin-top:35px;margin-left:-7px}.growth-panel{padding:24px 26px 18px}.coverage-panel{text-align:center}.coverage-panel .panel-heading{text-align:left}.coverage-panel>p{color:#9ca6b5;max-width:220px;margin:16px auto;font-size:11px}.coverage-ring{background:conic-gradient(#70b69e var(--progress), #edf3f0 0);border-radius:50%;width:145px;height:145px;margin:12px auto 0;padding:11px;transform:rotate(-90deg)}.coverage-ring>div{background:#fff;border-radius:100%;flex-direction:column;justify-content:center;align-items:center;width:100%;height:100%;display:flex;transform:rotate(90deg)}.coverage-ring strong{letter-spacing:-1px;color:#536a61;font-size:32px;font-weight:500;line-height:1.4}.coverage-ring strong small{margin-left:3px;font-size:15px}.coverage-ring span{color:#9caaa3;font-size:10px}.coverage-panel .text-link{font-size:11px}.dashboard-bottom{grid-template-columns:1.15fr 1fr;gap:23px;display:grid}.library-progress>a{border-bottom:1px solid #f0f3f8;align-items:center;gap:13px;padding:15px 0;display:flex}.library-progress>a:last-child{border:0}.library-icon{border-radius:11px;flex-shrink:0;justify-content:center;align-items:center;width:43px;height:43px;display:flex}.color-0{color:#7099d0;background:#eaf2ff}.color-1{color:#6ba58d;background:#eaf6ef}.color-2{color:#a08cc3;background:#f5effb}.color-3{color:#b59b66;background:#fcf4e7}.library-progress>a>div:nth-child(2){flex:1;min-width:0}.library-progress strong{text-overflow:ellipsis;white-space:nowrap;font-size:12px;font-weight:550;display:block;overflow:hidden}.library-progress small{color:#a1acba;margin-top:4px;font-size:10px;display:block}.library-progress>a>span{text-align:right;color:#8999ae;font-size:12px}.progress-track{background:#edf2f8;border-radius:4px;height:4px;margin-top:9px;overflow:hidden}.progress-track i{background:#8fb4ea;border-radius:4px;height:100%;display:block}.recent-list>a{border-bottom:1px solid #f0f3f8;align-items:center;gap:12px;padding:15px 0;display:flex}.recent-list>a:last-child{border:0}.activity-dot{background:#98b5df;border-radius:50%;width:7px;height:7px}.recent-list>a>div:nth-child(2){flex:1;min-width:0}.recent-list strong{white-space:nowrap;text-overflow:ellipsis;font-size:12px;font-weight:500;display:block;overflow:hidden}.recent-list small{color:#a6b0bd;margin-top:4px;font-size:10px;display:block}.recent-list .status{font-size:9px}.library-grid,.paper-grid,.group-grid{grid-template-columns:repeat(3,minmax(0,1fr));gap:22px;display:grid}.library-card,.paper-card,.group-card{border:1px solid var(--line);background:#fff;border-radius:18px;min-width:0;padding:23px}.library-cover{border-radius:13px;justify-content:space-between;align-items:center;height:100px;margin-bottom:22px;padding:25px;display:flex}.library-cover span{font-size:12px}.library-card h2{margin-bottom:7px;font-size:17px}.library-card>p{color:#9aa5b4;font-size:11px}.library-card-meta{color:#8a99ad;gap:18px;margin:20px 0;font-size:11px;display:flex}.card-actions{border-top:1px solid #eff3f8;justify-content:space-between;align-items:center;gap:8px;margin-top:15px;padding-top:16px;display:flex}.card-actions>div{align-items:center;gap:10px;display:flex}.card-actions>small{color:#a0adbd;font-size:10px}.toolbar{justify-content:space-between;align-items:center;gap:15px;margin-bottom:15px;display:flex}.chapter-editor{max-height:52vh;overflow:auto}.chapter-row{grid-template-columns:100px 80px 1fr 1.3fr 25px 25px;align-items:center;gap:6px;margin-bottom:10px;display:grid}.chapter-row input,.chapter-row textarea{min-height:35px;padding:6px;font-size:11px}.chapter-row textarea{height:56px}.chapter-row .icon-button{width:25px;min-width:25px}.upload-layout{grid-template-columns:1fr 245px;align-items:start;gap:28px;display:grid}.upload-panel{padding:28px}.dropzone{text-align:center;background:#f8faff;border:1.5px dashed #d5e0f2;border-radius:15px;margin:20px 0;padding:40px 20px}.dropzone.drag{border-color:var(--blue);background:#eaf2ff}.upload-icon{color:#85a5d2;background:#eaf1fd;border-radius:18px;justify-content:center;align-items:center;width:65px;height:65px;margin:0 auto 22px;display:flex}.dropzone h2{margin-bottom:9px;font-size:18px}.dropzone>p{color:#9aa7b9;font-size:12px}.drop-actions{justify-content:center;gap:12px;margin:22px 0;display:flex}.dropzone small{color:#acb6c5;font-size:10px}.upload-tips{padding:28px 5px}.upload-tips h3{margin-bottom:30px;font-size:15px}.tip{gap:15px;margin-bottom:28px;display:flex}.tip>span{color:#83a0c8;background:#e9f0fa;border-radius:8px;height:29px;padding:5px 7px;font-size:11px}.tip strong{font-size:12px;font-weight:550}.tip p{color:#98a5b6;margin-top:6px;font-size:11px;line-height:1.9}.file-list>div{color:#8195af;border:1px solid #edf1f8;border-radius:9px;align-items:center;gap:10px;margin:6px 0;padding:10px 12px;display:flex}.file-list span{color:#647991;flex:1;font-size:12px}.file-list small{float:right;color:#b1bbc8}.text-input-details{margin:20px 0}details>summary{color:#7e8da2;cursor:pointer;padding:9px 0;font-size:12px}details>textarea{width:100%;margin:10px 0}.upload-submit{justify-content:space-between;align-items:center;gap:12px;margin-top:24px;display:flex}.upload-submit>span{color:#9da9b9;align-items:center;gap:6px;font-size:10px;display:flex}.queue-summary{background:#edf4ff;border:1px solid #e0eafb;border-radius:18px;align-items:center;gap:22px;margin-bottom:28px;padding:25px 30px;display:flex}.queue-orb{color:#7fa6df;background:#fff;border-radius:18px;flex-shrink:0;justify-content:center;align-items:center;width:59px;height:59px;display:flex}.queue-summary h2{margin-bottom:5px;font-size:18px}.queue-summary p{color:#8297b3;margin-bottom:4px;font-size:12px}.queue-summary small{color:#a0afc1;font-size:10px}.queue-summary b{color:#4d7ab7;font-weight:550}.batch-top{align-items:center;gap:14px;display:flex}.file-badge{color:#8aa6cc;background:#f0f5fc;border-radius:10px;justify-content:center;align-items:center;width:42px;height:42px;display:flex}.batch-top>div{flex:1}.batch-top h3{margin-bottom:4px;font-size:14px}.batch-top small{color:#a1adbc;font-size:10px}.batch-stats{color:#94a3b7;align-items:center;gap:22px;margin:22px 0 10px;font-size:12px;display:flex}.batch-stats b{color:#5c789d;margin:0 3px;font-weight:550}.batch-stats .button{margin-left:auto;font-size:11px}.job-row{border-top:1px solid #edf1f7;align-items:center;gap:15px;padding:12px 0;font-size:12px;display:flex}.job-row>div{flex:1}.job-row small{color:#95a0ae;max-width:600px;margin-top:4px;display:block}.search-box{border:1px solid var(--line);background:#fff;border-radius:14px;align-items:center;gap:13px;margin-bottom:16px;padding:8px 9px 8px 19px;display:flex}.search-box>svg{color:#9eacc1}.search-box input{border:0;outline:0;flex:1;padding:6px}.search-box .button{min-height:36px;padding:8px 24px}.filter-bar{flex-wrap:wrap;gap:10px;display:flex}.filter-bar select,.filter-bar input{border-color:#e5ecf5;flex:1;min-width:120px;max-width:240px;min-height:37px;font-size:11px}.chapter-filter{width:100%;margin-top:12px;font-size:12px}.results-bar{color:#99a5b6;justify-content:space-between;align-items:center;margin:24px 0 15px;font-size:11px;display:flex}.results-bar>div{align-items:center;gap:20px;display:flex}.results-bar .check-label{margin:0;font-size:11px}.results-bar select{min-height:30px;padding:4px 10px;font-size:11px}.question-card{border:1px solid var(--line);background:#fff;border-radius:17px;margin-bottom:17px;padding:23px 25px}.question-card.selected{border-color:#a7c5f1;box-shadow:0 0 0 2px #e7f0ff}.question-card-head{justify-content:space-between;align-items:center;gap:15px;margin-bottom:20px;display:flex}.chips{flex-wrap:wrap;gap:7px;display:flex}.stars{color:#dab46a;letter-spacing:2px;white-space:nowrap;font-size:12px}.question-content{color:#344156;font-size:14px;line-height:1.9}.question-content img{max-width:var(--image-width,70%);object-fit:contain;max-height:320px;margin:15px 0;display:block}.question-options{grid-template-columns:repeat(2,minmax(0,1fr));gap:10px 20px;margin-top:12px;display:grid}.question-options>div{gap:8px;display:flex}.question-options b{font-weight:500}.question-options p{margin:0}.question-part{padding:8px 0}.question-part>b{font-size:13px;font-weight:550}.material{background:#f8faff;border-left:3px solid #dbe6f6;margin-bottom:15px;padding:14px 18px}.markdown{overflow-wrap:anywhere;line-height:1.9}.markdown p{margin:5px 0 10px}.markdown table{border-collapse:collapse;max-width:100%;margin:14px 0;font-size:12px}.markdown td,.markdown th{border:1px solid #dce5f2;padding:7px 12px}.markdown th{background:#f6f9fe;font-weight:550}.markdown .katex-display{padding:6px 0;overflow:auto hidden}.answer{color:#617e6e;background:#f5f9f7;border-radius:10px;margin-top:20px;padding:15px 17px;font-size:13px}.answer>small{color:#7e9c8a;margin-bottom:9px;font-size:10px;display:block}.question-card-foot{border-top:1px solid #f0f4f9;justify-content:space-between;align-items:center;gap:16px;margin-top:20px;padding-top:15px;display:flex}.question-card-foot>div:last-child{flex-shrink:0;align-items:center;gap:18px;display:flex}.question-card-foot .button{min-height:32px;padding:7px 12px;font-size:11px}.tags{flex-wrap:wrap;gap:6px;display:flex}.tags>button,.tags>span{color:#8c9db3;background:#f0f5fb;border-radius:5px;padding:3px 8px;font-size:10px}.pagination{justify-content:center;align-items:center;gap:15px;margin:25px;display:flex}.pagination button{border:1px solid var(--line);background:#fff;border-radius:8px;padding:5px}.pagination span{color:#8b9bb0;font-size:12px}.basket-bar{z-index:50;background:#fff;border:1px solid #dce8fa;border-radius:17px;align-items:center;gap:20px;min-width:480px;padding:14px 21px;display:flex;position:fixed;bottom:23px;left:calc(50% + 113px);transform:translate(-50%);box-shadow:0 10px 40px #54729620}.basket-bar>svg{color:#6d98d4}.basket-bar>div{flex:1}.basket-bar strong{font-size:13px;font-weight:550}.basket-bar small{color:#9eacc0;font-size:10px;display:block}.editor-meta{color:#94a2b7;align-items:center;gap:15px;margin:-12px 0 23px;font-size:11px;display:flex}.editor-meta>.text-link{margin-left:auto}.save-state{color:#93a48e;max-width:150px;font-size:10px}.review-layout{grid-template-columns:1fr 1.1fr;align-items:start;gap:23px;display:grid}.original-panel{max-height:90vh;position:sticky;top:15px;overflow:auto}.original-panel>a{color:#7f9cca;font-size:11px}.original-image{border:1px solid #edf0f6;border-radius:8px;width:100%;margin-top:16px}.original-text{white-space:pre-wrap;font-size:13px;line-height:1.8}.changes{margin-top:24px}.changes>div{border:1px solid #e9eef5;border-radius:10px;margin:12px 0;padding:13px}.changes small,.changes del,.changes ins{margin-bottom:6px;font-size:11px;display:block}.changes del{color:#bb6c67;background:#fff0ef;padding:6px;text-decoration:none}.changes ins{color:#609078;background:#edf8f1;padding:6px;text-decoration:none}.issues{color:#a28b55;background:#fff8e9;border:1px solid #f5e8c7;border-radius:11px;margin-bottom:22px;padding:16px;font-size:12px}.issues p{margin:6px 0}.editor-field{border:1px solid #e3eaf5;border-radius:11px;margin:16px 0;overflow:hidden}.editor-field-label{background:#fafbfd;border-bottom:1px solid #edf1f7;justify-content:space-between;align-items:center;padding:9px 12px;display:flex}.editor-field-label strong{color:#788ba6;font-size:12px;font-weight:550}.editor-field-label button{color:#98a6ba;padding:3px 8px;font-size:10px}.editor-field-label button.active{color:var(--blue);background:#ebf2fd;border-radius:5px}.format-toolbar{border-bottom:1px solid #f1f4f8;gap:4px;padding:6px 10px;display:flex}.format-toolbar button{color:#96a6ba;border-radius:4px;padding:4px 7px;font-size:10px}.format-toolbar button:hover{background:#edf3fb}.editor-field textarea{resize:vertical;border:0;border-radius:0;width:100%;min-height:95px;padding:13px;font-size:13px}.editor-field>.markdown{min-height:90px;padding:15px;font-size:13px}.editable-panel>.inline-actions{margin:20px 0}.editable-panel>h3{margin:30px 0 15px}.subquestion{border-left:2px solid #dde9fa;margin-top:22px;padding-left:15px}.diagram-view{background:#fff;border:1px solid #edf1f7;border-radius:10px;max-width:100%;margin:12px 0;padding:12px}.diagram-view svg{max-width:100%;max-height:360px;margin:auto;display:block}.diagram-editor{border:1px solid #e8eff9;border-radius:12px;margin:16px 0;padding:10px 14px}.diagram-editor select{width:100%;margin:10px 0}.image-edit-list{flex-wrap:wrap;gap:10px;display:flex}.image-edit-list>div{border:1px solid var(--line);border-radius:8px;width:130px;padding:9px}.image-edit-list img{object-fit:contain;width:100%;height:95px}.editor-danger{border-top:1px solid var(--line);justify-content:space-between;margin-top:22px;padding-top:20px;display:flex}.library-choice{border:1px solid var(--line);border-radius:10px;justify-content:space-between;align-items:center;width:100%;margin:10px 0;padding:15px;display:flex}.paper-icon{color:#80a4d5;background:#eef4fd;border-radius:12px;justify-content:center;align-items:center;width:45px;height:45px;margin-bottom:20px;display:flex}.paper-card>small{color:#9baabd;font-size:10px}.paper-card h2{margin:7px 0 22px;font-size:16px}.paper-metrics{gap:30px;margin-bottom:20px;display:flex}.paper-metrics>span{color:#6883a7;font-size:21px}.paper-metrics small{color:#a3b0c2;margin-left:6px;font-size:10px}.auto-paper{max-width:1000px}.mode-options{grid-template-columns:repeat(3,1fr);gap:16px;margin-bottom:30px;display:grid}.mode-options button{color:#8c9bb0;border:1px solid #e6edf6;border-radius:13px;flex-direction:column;align-items:center;gap:9px;padding:22px;display:flex}.mode-options button.active{color:#4c7fc3;background:#f0f6ff;border-color:#9bbff5}.mode-options strong{font-size:13px}.mode-options small{font-size:10px}.paper-workspace{grid-template-columns:280px minmax(0,1fr);align-items:start;gap:25px;display:grid}.paper-controls .panel{padding:20px}.paper-controls .field{margin-bottom:14px}.paper-controls .field input,.paper-controls .field select{min-height:35px;padding:7px 9px;font-size:11px}.paper-controls .field>span{font-size:10px}.paper-controls h3{margin-bottom:20px;font-size:13px}.paper-controls .form-grid{gap:0 10px}.paper-controls .check-label{font-size:11px}.paper-controls .muted{font-size:10px}.paper-canvas{background:#eaf0f7;border-radius:15px;min-width:0;padding:17px}.canvas-toolbar{color:#8b9db5;justify-content:space-between;gap:10px;margin:2px 0 18px;font-size:11px;display:flex}.canvas-toolbar small{font-size:9px}.paper-sheet{background:#fff;min-height:850px;padding:35px;box-shadow:0 3px 13px #6c86a212}.paper-sheet>h1{text-align:center;letter-spacing:0;margin:15px 0;font-size:20px}.paper-sheet>.center{color:#5f6c7d;font-size:12px}.paper-question{border:1px solid #0000;padding:12px;position:relative}.paper-question.chosen{border-color:#adc8ed;border-radius:6px}.paper-question-tools{justify-content:space-between;align-items:center;margin-bottom:8px;font-size:12px;display:flex}.paper-question-tools>div{opacity:0;display:flex}.paper-question:hover .paper-question-tools>div,.paper-question.chosen .paper-question-tools>div{opacity:1}.paper-question-tools .icon-button{width:25px;min-width:25px;height:25px}.paper-question .question-content{font-size:inherit}.paper-question .diagram-view{max-width:var(--image-width,100%);border:0}.answer-space.lines{background:repeating-linear-gradient(#fff 0 8mm,#ccd3dc 8mm 8.15mm)}.answer-space.grid{background-image:linear-gradient(#e1e5eb 1px,#0000 1px),linear-gradient(90deg,#e1e5eb 1px,#0000 1px);background-size:5mm 5mm}.page-break-label{color:#a6b3c6;font-size:9px}.preview-actions{justify-content:space-between;align-items:center;gap:15px;margin-bottom:15px;display:flex}.preview-actions p{color:#9ba8ba;margin:0;font-size:12px}.pdf-frame{border:1px solid var(--line);border-radius:10px;width:100%;height:70vh}.export-history{margin-top:20px}.export-link{color:#6e8daf;align-items:center;gap:9px;padding:10px 0;font-size:11px;display:flex}.group-card{transition:transform .2s;position:relative}.group-card:hover{transform:translateY(-3px)}.group-icon{border-radius:15px;justify-content:center;align-items:center;width:52px;height:52px;margin-bottom:23px;display:flex}.group-card>.pill{position:absolute;top:26px;right:20px}.group-card h2{margin:0 0 8px;font-size:18px}.group-card p{color:#a0aec0;margin-bottom:25px;font-size:11px}.sharing-explainer{margin-top:30px}.sharing-explainer p{color:#8a9aae;font-size:12px;line-height:1.9}.group-detail-grid{grid-template-columns:1.3fr 1fr;gap:22px;display:grid}.shared-library,.member-row{border-bottom:1px solid #edf2f9;align-items:center;gap:12px;padding:17px 0;display:flex}.shared-library>div,.member-row>div{flex:1}.shared-library strong,.member-row strong{font-size:13px;font-weight:550}.shared-library small,.member-row small{color:#a2aec0;margin-top:5px;font-size:10px;display:block}.copy-link{gap:10px;margin-top:20px;display:flex}.copy-link input{flex:1;min-width:0;font-size:11px}.join-page{justify-content:center;align-items:center;min-height:100vh;padding:25px;display:flex}.join-page .panel{text-align:center;max-width:600px;padding:50px}.join-page .panel>svg{color:#7b9fce;margin-bottom:24px}.join-page h1{font-size:27px}.join-page p{color:#8e9db1;font-size:13px;line-height:2}.settings-grid{grid-template-columns:1fr 1fr;gap:22px;display:grid}.settings-grid .panel{margin:0 0 4px}.settings-grid+.panel{margin-top:24px}.settings-grid h2{margin-bottom:25px;font-size:17px}.settings-grid p{color:#94a2b4;font-size:12px;line-height:1.9}.membership-card{align-items:center;gap:15px;margin-bottom:25px;display:flex}.membership-card h3{margin:0 0 3px}.membership-card p{margin:0;font-size:11px}.info-list{grid-template-columns:115px 1fr;gap:14px;margin-bottom:25px;font-size:12px;display:grid}.info-list dt{color:#a1aebe}.info-list dd{color:#6d819c;margin:0}.library-checks{max-height:180px;margin:20px 0;overflow:auto}.package-preview{border:1px solid #e4edf8;border-radius:12px;margin-top:20px;padding:18px}.package-preview h3{font-size:14px}.settings-grid input[type=file]{width:100%;margin:20px 0;font-size:11px}.settings-grid .check-label{font-size:11px}.correction-row{border-top:1px solid var(--line);align-items:center;gap:20px;padding:15px 0;display:flex}.correction-row>div{flex:1}.correction-row p{color:#8e9db1;margin:5px 0;font-size:12px}.admin-stat-grid{grid-template-columns:repeat(3,1fr);gap:22px;margin-bottom:25px;display:grid}.table-panel{padding:10px 25px}.table-scroll{overflow:auto}table{border-collapse:collapse;width:100%}.table-panel th{text-align:left;color:#a0acc0;border-bottom:1px solid var(--line);white-space:nowrap;padding:20px 12px;font-size:11px;font-weight:500}.table-panel td{color:#7b8da7;border-bottom:1px solid #f0f4f9;padding:18px 12px;font-size:12px}.table-panel td>strong{color:#526c8c;font-weight:550}.table-panel td small{color:#aab6c6;margin-top:5px;font-size:10px;display:block}.table-panel .inline-actions{white-space:nowrap;flex-wrap:nowrap}.table-panel .text-link{font-size:11px}.panel.narrow{max-width:600px}.code-editor{width:100%;font-family:ui-monospace,monospace;font-size:12px;line-height:1.6}.audit-row{border-bottom:1px solid var(--line);padding:10px 0}.audit-row pre{white-space:pre-wrap;color:#8397b1;background:#f8faff;padding:15px;font-size:11px}.sidebar-shade{display:none}@media (width>=1600px){.workspace{padding-left:55px;padding-right:55px}.page-head{margin-top:18px}.hero{margin-top:85px}}@media (width<=1200px){.sidebar{width:203px;padding-left:13px;padding-right:13px}.main-shell{width:calc(100% - 203px);margin-left:203px}.workspace{padding:25px 24px 90px}.topbar{padding:0 25px}.page-head h1{font-size:25px}.stat-card{padding:18px}.stat-card>strong{font-size:31px}.stat-grid{gap:12px}.dashboard-middle{grid-template-columns:1.45fr 1fr;gap:18px}.dashboard-bottom{gap:18px}.library-grid,.paper-grid,.group-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.upload-layout{grid-template-columns:1fr 205px;gap:20px}.hero{gap:35px;margin-top:40px}.hero h1{font-size:41px}.price-grid{grid-template-columns:repeat(2,1fr)}.price-card{padding:28px}.review-layout{grid-template-columns:.85fr 1.15fr;gap:16px}.review-layout .panel{padding:18px}.paper-workspace{grid-template-columns:240px 1fr;gap:17px}.paper-sheet{padding:24px}.head-actions .save-state{display:none}.basket-bar{left:calc(50% + 101px)}}@media (width<=900px){.sidebar{width:190px}.main-shell{width:calc(100% - 190px);margin-left:190px}.sidebar>.brand{padding-left:5px}.sidebar nav a{padding:11px 12px}.workspace{padding:23px 20px 95px}.page-head{flex-wrap:wrap;gap:17px}.stat-grid{grid-template-columns:repeat(2,1fr);gap:14px}.dashboard-middle,.dashboard-bottom{grid-template-columns:1fr}.coverage-panel{display:none}.upload-layout{grid-template-columns:1fr}.upload-tips{display:none}.review-layout{grid-template-columns:1fr}.original-panel{max-height:500px;position:static}.paper-workspace{grid-template-columns:1fr}.paper-controls{grid-template-columns:1fr 1fr;gap:14px;display:grid}.paper-controls .panel{margin:0}.paper-controls .panel:last-child{grid-column:1/-1}.paper-canvas{padding:12px}.group-detail-grid,.settings-grid{grid-template-columns:1fr}.hero{text-align:center;grid-template-columns:1fr;max-width:630px;margin-top:25px}.hero-actions,.hero-note{justify-content:center}.hero-board{display:none}.public-header{padding:22px 30px}.public-header nav{gap:17px}.public-header nav>.button.secondary{display:none}.feature-grid{gap:14px}.feature-grid article{padding:22px}.section-title h2{font-size:25px}.basket-bar{min-width:420px;left:calc(50% + 95px)}.contact-float{padding:12px;font-size:0;right:17px}.contact-float svg{width:20px;height:20px}.chapter-row{grid-template-columns:80px 1fr 1fr 25px 25px}.batch-stats{flex-wrap:wrap;gap:12px}.batch-stats .button{margin-left:0}}@media (width<=680px){.sidebar{width:235px;transition:transform .2s;transform:translate(-100%)}.sidebar.open{transform:translate(0)}.sidebar-shade{z-index:55;background:#22365050;display:block;position:fixed;inset:0}.sidebar:not(.open)+.sidebar-shade{display:none}.main-shell{width:100%;margin-left:0}.topbar{height:65px;padding:0 18px}.mobile-menu{display:flex}.breadcrumb{margin-left:8px;margin-right:auto}.user-menu>span:nth-child(2){display:none}.workspace{padding:22px 17px 100px}.page-head{margin:7px 0 24px}.page-head h1{letter-spacing:-.6px;font-size:24px}.page-head p{font-size:12px;line-height:1.8}.page-head .eyebrow{margin-bottom:10px;font-size:10px}.head-actions{flex-wrap:wrap;gap:8px}.head-actions .button{min-height:37px;padding:8px 13px;font-size:11px}.stat-card{padding:17px}.stat-card>strong{margin:9px 0 6px;font-size:31px}.stat-label{font-size:11px}.stat-label svg{width:17px}.stat-card>span:last-child{font-size:9px}.stat-grid{gap:11px;margin-bottom:18px}.panel{border-radius:15px;margin-bottom:18px;padding:20px}.dashboard-middle,.dashboard-bottom{gap:0}.chart{height:185px;margin-top:25px}.library-grid,.paper-grid,.group-grid{grid-template-columns:1fr;gap:16px}.library-cover{height:85px}.contact-float{bottom:18px;right:15px}.basket-bar{gap:12px;min-width:0;padding:12px 15px;bottom:18px;left:15px;right:15px;transform:none}.basket-bar>svg{display:none}.basket-bar .button{padding:9px 12px;font-size:11px}.basket-bar small{font-size:9px}.basket-bar strong{font-size:12px}.basket-bar .text-link{font-size:11px}.basket-bar~.contact-float{display:none}.modal-backdrop{padding:12px}.modal{border-radius:17px;max-height:94vh;padding:22px 18px}.modal>header h2{font-size:18px}.form-grid{gap:0 12px}.field{margin-bottom:15px}.field>span{font-size:11px}.field input,.field select,.field textarea{min-height:39px;font-size:12px}.public-header{padding:20px}.public-header .brand>span:last-child{font-size:18px}.public-header .brand-mark{width:33px;height:33px}.public-header nav>a:not(.button){display:none}.public-header nav .button{min-height:37px;padding:9px 13px;font-size:11px}.hero{margin:25px auto 45px;padding:30px 25px}.hero h1{letter-spacing:-1.1px;font-size:37px;line-height:1.5}.hero p{font-size:13px}.hero-actions{gap:18px}.hero .button.large{padding:12px 17px;font-size:12px}.hero .text-link{font-size:12px}.hero-note{font-size:9px}.features,.pricing{padding:35px 20px}.feature-grid{grid-template-columns:1fr}.feature-grid article{padding:23px}.feature-icon{margin-bottom:20px}.feature-grid h3{margin-bottom:9px}.feature-grid p{font-size:12px}.section-title h2{font-size:23px}.section-title p{font-size:11px;line-height:1.9}.price-grid{gap:12px}.price-card{padding:20px 15px}.price-card .pill{font-size:9px}.price-card h3{margin-top:18px;font-size:14px}.price{font-size:34px}.price>small{font-size:9px}.price-card li{align-items:flex-start;gap:4px;font-size:9px}.price-card li svg{width:11px;height:16px}.price-card .button{gap:5px;min-height:35px;padding:8px;font-size:10px}.public-page>footer{flex-wrap:wrap;gap:23px;padding:28px 22px}.public-page>footer>span{display:none}.login-page{padding:22px}.login-card{margin:45px auto;padding:28px 23px}.login-card h1{font-size:24px}.upload-panel{padding:20px}.dropzone{padding:30px 15px}.dropzone h2{font-size:16px}.dropzone p{font-size:10px}.dropzone small{font-size:9px}.upload-submit{flex-direction:column;align-items:stretch;gap:16px}.upload-submit>span{justify-content:center;font-size:9px}.upload-submit .button{width:100%}.file-list small{float:none;display:block}.queue-summary{gap:14px;padding:20px}.queue-orb{border-radius:12px;width:43px;height:43px}.queue-orb svg{width:23px}.queue-summary h2{font-size:15px}.queue-summary p{font-size:10px;line-height:1.9}.queue-summary small{font-size:9px}.batch-top h3{overflow-wrap:anywhere;font-size:13px}.batch-stats{gap:14px;font-size:10px}.batch-stats .button{width:100%;margin-top:8px}.job-row{flex-wrap:wrap;gap:10px;font-size:11px}.filter-bar{gap:7px}.filter-bar select,.filter-bar input{min-width:100px;max-width:100%;min-height:35px;padding:7px;font-size:10px}.search-box{padding:6px 7px 6px 14px}.search-box input{font-size:12px}.search-box .button{padding:7px 13px;font-size:11px}.results-bar{font-size:10px}.results-bar>div{gap:10px}.results-bar .check-label{font-size:10px}.question-card{padding:19px 17px}.question-card-head{align-items:flex-start;gap:8px}.chips{gap:5px}.chip,.status{padding:3px 6px;font-size:9px}.stars{letter-spacing:0;font-size:10px}.question-content{font-size:13px}.question-options{grid-template-columns:1fr;gap:7px}.question-card-foot{flex-wrap:wrap}.question-card-foot>div:last-child{gap:16px;margin-left:auto}.question-card-foot .text-link{font-size:11px}.tags>button,.tags>span{font-size:9px}.editor-meta{flex-wrap:wrap;gap:10px;font-size:10px}.editor-meta .text-link{font-size:10px}.original-panel{max-height:350px}.editor-field textarea{font-size:12px}.mode-options{gap:8px}.mode-options button{padding:17px 8px}.mode-options strong{font-size:11px}.mode-options small{font-size:8px}.mode-options svg{width:19px}.paper-controls{display:block}.paper-controls .panel{margin-bottom:15px}.paper-sheet{min-height:600px;padding:17px 10px}.paper-sheet h1{font-size:18px}.paper-question{padding:9px 5px}.paper-question-tools>div{opacity:1}.paper-question-tools>strong{font-size:10px}.paper-canvas{padding:9px}.canvas-toolbar{flex-direction:column;gap:3px}.paper-canvas .question-content{font-size:12px}.preview-actions{flex-wrap:wrap}.preview-actions p{font-size:11px}.pdf-frame{height:65vh}.chapter-row{grid-template-columns:1fr 1fr 25px}.chapter-row input:first-child{grid-column:1}.chapter-row textarea{grid-column:1/3}.chapter-row .icon-button{grid-column:3}.group-detail-grid{gap:0}.member-row{gap:9px}.member-row .text-link{font-size:10px}.shared-library{flex-wrap:wrap}.shared-library strong{font-size:12px}.settings-grid{gap:15px}.settings-grid .panel{padding:22px}.info-list{grid-template-columns:95px 1fr;font-size:11px}.admin-stat-grid{gap:10px}.admin-stat-grid .stat-card{padding:15px 12px}.admin-stat-grid .stat-card>strong{font-size:25px}.admin-stat-grid .stat-card>span{font-size:9px}.admin-stat-grid small{font-size:8px}.tabs{white-space:nowrap;gap:0;overflow:auto}.tabs button{padding:11px 14px;font-size:11px}.table-panel{padding:5px 12px}.table-panel th,.table-panel td{padding:15px 9px;font-size:10px}.toast{min-width:250px;font-size:12px;bottom:80px}.join-page .panel{padding:33px 23px}.join-page h1{font-size:23px}.membership-banner{gap:10px;padding:12px 18px;font-size:10px}.copy-link,.correction-row{flex-wrap:wrap}.correction-row>div{flex-basis:100%}}@media (prefers-reduced-motion:reduce){*{scroll-behavior:auto!important;transition:none!important;animation:none!important}}.scroll-list{gap:12px;max-height:55vh;display:grid;overflow:auto}.panel.compact{padding:18px}.table-scroll{margin:16px 0;overflow:auto}.editable-table{border-collapse:collapse;width:100%}.editable-table td{border:1px solid #c8d4e3;min-width:100px;padding:6px}.editable-table textarea{min-height:55px}.structured-table{border-collapse:collapse}.structured-table td,.structured-table th{border:1px solid #b5bdc8;padding:6px 10px}.smart-select{vertical-align:middle;width:100%;min-width:0;max-width:100%;display:inline-flex;position:relative}.select-trigger{color:#35465e;text-align:left;background:#fff;border:1px solid #d9e3f0;border-radius:12px;justify-content:space-between;align-items:center;gap:12px;width:100%;min-height:44px;padding:10px 13px;font-size:13px;display:flex;box-shadow:0 2px 4px #2e568305}.select-trigger:hover{background:#f8fbff;border-color:#92b4e8}.select-trigger:focus-visible{outline-offset:2px;outline:3px solid #c7dcff}.select-trigger>span{text-overflow:ellipsis;white-space:nowrap;overflow:hidden}.select-trigger svg{color:#7189a8;flex-shrink:0}.select-popover{z-index:2000;background:#fff;border:1px solid #d9e3f0;border-radius:14px;max-width:calc(100vw - 24px);padding:8px;position:fixed;box-shadow:0 14px 44px #304b6a28}.select-popover>input{width:100%;font-size:13px}.select-popover [role=listbox]{max-height:230px;padding-top:6px;overflow:auto}.select-popover [role=option]{text-align:left;border-radius:9px;width:100%;padding:11px;font-size:13px;line-height:1.6;display:block}.select-popover [role=option]:hover,.select-popover .focused{background:#f0f5fe}.select-popover [aria-selected=true]{color:#2162c4;background:#eaf2ff}.filter-bar>.smart-select{flex:1;min-width:150px}.field>.smart-select{display:flex}.results-bar .smart-select{width:150px}.back-link{color:#547195;align-items:center;gap:6px;margin:0 0 14px;font-size:13px;display:flex}.help-tip{vertical-align:middle;display:inline-flex;position:relative}.help-tip>button{color:#7f93ae;padding:3px;display:flex}.help-tip>[role=tooltip]{z-index:100;color:#fff;white-space:normal;background:#253c59;border-radius:10px;width:270px;max-width:70vw;padding:12px;font-size:12px;line-height:1.8;position:absolute;bottom:calc(100% + 8px);left:50%;transform:translate(-50%);box-shadow:0 6px 20px #263e5930}.formula-help{margin-left:auto;font-size:11px}.formula-guide{z-index:2;background:#f5f8fe;border:1px solid #dce7f6;border-radius:12px;width:100%;max-width:530px;margin:10px 0;padding:14px;position:relative}.formula-guide p{font-size:12px}.formula-guide>button{text-align:left;border-top:1px solid #e1e8f3;grid-template-columns:72px 1fr 70px 40px;align-items:center;gap:8px;width:100%;padding:9px 0;font-size:12px;display:grid}.formula-guide code{white-space:normal;word-break:break-all}.formula-guide p{margin:0}.editor-field-label{flex-wrap:wrap;gap:10px}.options-preview{padding:18px}.question-content,.editor-field>.markdown,.options-preview,.figure-slot{font-family:Noto Serif CJK SC,Songti SC,SimSun,serif;font-size:16px;line-height:1.85}.question-content .katex,.editor-field .katex{font-size:1.05em}.question-content .diagram-view{width:var(--image-width,55%);max-width:360px;max-height:300px}.question-content .diagram-view svg{width:100%;max-height:300px}.question-content img{max-width:var(--image-width,55%);max-height:260px}.question-options{gap:10px 24px}.source-badge{color:#7085a0;text-overflow:ellipsis;white-space:nowrap;background:#f4f7fc;border-radius:7px;max-width:100%;margin-bottom:15px;padding:6px 10px;font-size:12px;display:block;overflow:hidden}.question-card-head{flex-wrap:wrap;justify-content:flex-start;gap:10px;margin-bottom:15px}.question-card-head .stars{margin-left:auto}.card-primary{min-height:36px;padding:7px 12px;font-size:12px}.personal-actions{opacity:.85;margin-top:12px;font-size:11px}.question-browser{grid-template-columns:265px minmax(0,1fr);align-items:start;gap:22px;display:grid}.browser-results{min-width:0}.curriculum-nav{background:#fff;border:1px solid #dfe7f3;border-radius:16px;max-height:calc(100vh - 45px);padding:15px;font-size:12px;position:sticky;top:20px;overflow:auto}.nav-heading{color:#334966;justify-content:space-between;align-items:center;margin:0 0 13px;display:flex}.curriculum-nav>input{width:100%;font-size:12px}.volume-tabs{flex-wrap:wrap;gap:5px;margin:12px 0;display:flex}.volume-tabs button{color:#657e9f;background:#f2f5fa;border-radius:7px;padding:6px 9px;font-size:12px}.volume-tabs .active{color:#2162c4;background:#e6f0ff}.catalog-books>button{text-align:left;border-bottom:1px solid #edf1f7;width:100%;padding:15px 2px;display:block}.catalog-books span,.catalog-books small{color:#8b9ab0;margin-top:5px;display:block}.catalog-chapter{border-top:1px solid #e9eef6;padding:10px 0}.catalog-chapter>summary{cursor:pointer;color:#3c5577;font-weight:600;line-height:1.6}.catalog-chapter small,.catalog-section small{color:#8395ac;font-size:10px;font-weight:400;display:block}.curriculum-nav small b{color:#2467cf;font-weight:500}.catalog-section{padding:7px 0 4px 8px}.catalog-section>summary{cursor:pointer;color:#7389a7}.catalog-section>summary button{text-align:left;vertical-align:top;border-radius:6px;max-width:94%;padding:5px;font-size:12px;line-height:1.6}.catalog-tag{text-align:left;color:#7187a2;border-radius:6px;justify-content:space-between;gap:8px;width:100%;padding:6px 8px 6px 18px;font-size:11px;line-height:1.7;display:flex}.catalog-tag small{flex-shrink:0}.curriculum-nav .active{color:#2162c4;background:#edf4ff}.catalog-all{text-align:left;border-radius:8px;width:100%;margin:8px 0;padding:12px 8px}.catalog-all small{float:right}.chapter-all{color:#2467cf;padding:5px 15px;font-size:11px}.chapter-picker{background:#fff;border:1px solid #dfe7f3;border-radius:12px;padding:13px}.chapter-picker summary{cursor:pointer;color:#386ba8;padding:8px 0}.chapter-picker input:not([type=checkbox]){width:100%}.chapter-choices{max-height:260px;margin-top:12px;overflow:auto}.chapter-choices .check-label{border-bottom:1px solid #eef2f8;align-items:flex-start;margin:0;padding:10px;line-height:1.6;display:flex}.chapter-choices input{flex-shrink:0;margin-top:3px}.figure-panel{background:#f8fbff;border:1px solid #dfe8f5;border-radius:14px;margin:25px 0;padding:18px}.figure-slot{background:#fff;border:1px solid #e2e9f4;border-radius:12px;margin:12px 0;padding:15px}.figure-slot-head{font-family:var(--font,sans-serif);justify-content:space-between;align-items:center;gap:12px;font-size:13px;display:flex}.figure-slot img,.figure-slot .diagram-view{object-fit:contain;max-width:100%;max-height:280px;margin:15px auto;display:block}.figure-slot svg{width:100%;max-height:280px}.figure-slot>.text-link{margin-right:18px;font-size:12px}.figure-panel .notice p{margin:6px 0}.truncate{white-space:nowrap;text-overflow:ellipsis;display:block;overflow:hidden}.batch-title{flex:1;min-width:0}.batch-complete{background:#fcfffd;border-color:#b8dccc}.success-box{color:#267350;background:#eaf8f1;border-radius:10px;margin:16px 0;padding:14px 16px}.batch-notices{color:#8b691e;overflow-wrap:anywhere;background:#fff8e8;border:1px solid #f1dfb5;border-radius:11px;margin:16px 0;padding:12px 16px;font-size:13px;line-height:1.8}.batch-notices summary{cursor:pointer;font-weight:600}.job-row{align-items:flex-start;gap:16px}.job-row>div{min-width:0}.job-row p{margin:6px 0;font-size:13px}.job-row .job-actions{flex-direction:column;flex:0 0 120px;gap:9px;display:flex}.job-events{color:#657d9c;padding-left:18px;font-size:12px;line-height:1.9}.job-events time{color:#8c9bb0;padding-right:12px}.job-row summary{color:#5f7da4;cursor:pointer;margin-top:9px;font-size:12px}.job-running{background:#f3f8ff;border-radius:10px;padding:15px}.job-running .status{animation:2s ease-in-out infinite pulse}.paper-books{color:#4e6687;font-size:13px;line-height:1.7}.paper-workspace{grid-template-columns:290px minmax(0,1fr)}.paper-controls{min-width:0}.meta-toggles{grid-template-columns:1fr 1fr;gap:4px;display:grid}.meta-toggles .check-label{margin:4px 0}.paper-controls .button.full{font-size:12px}.paper-sheet.arrangement{width:100%;min-height:0;box-shadow:none;background:0 0;border:0;padding:15px}.paper-question{cursor:grab;background:#fff;border:1px solid #dce6f3;border-radius:12px;padding:18px;margin-bottom:12px!important}.paper-question.chosen{border-color:#94b8eb}.paper-question:active{cursor:grabbing}.paper-question-tools{color:#496486;background:0 0;flex-wrap:wrap;justify-content:space-between;gap:10px;margin-bottom:12px;display:flex;position:static;opacity:1!important}.paper-question-tools>div{flex-wrap:wrap;align-items:center;gap:4px;display:flex}.move-to{align-items:center;gap:5px;font-size:11px;display:flex}.move-to input{border-radius:7px;width:58px;min-height:30px;padding:4px 6px;font-size:12px}.paper-sheet.overview{align-items:start;gap:12px;display:grid}.overview .paper-question{min-width:0;padding:12px;font-size:12px;margin:0!important}.overview .paper-question-tools strong{width:100%;font-size:16px}.overview-stem{-webkit-line-clamp:3;-webkit-box-orient:vertical;font-size:12px;line-height:1.7;display:-webkit-box;overflow:hidden}.canvas-toolbar{flex-wrap:wrap;gap:12px}.canvas-toolbar .tabs{margin:0}.print-preview{background:#e8edf4;border-radius:14px;min-height:400px;padding:15px}.print-preview .pdf-frame{background:#fff;border:0;border-radius:5px;height:80vh;min-height:600px}.print-preview .preview-actions{flex-wrap:wrap;gap:12px;font-size:12px}.modal.drawer{border-radius:18px 0 0 18px;width:390px;max-width:95vw;max-height:100vh;padding:24px;position:fixed;top:0;bottom:0;right:0;overflow:auto;box-shadow:-12px 0 50px #213b5720}.drawer .field{margin:15px 0}.drawer .form-grid{grid-template-columns:1fr 1fr}.picker-browser{grid-template-columns:240px minmax(0,1fr);height:min(65vh,780px)}.picker-browser .curriculum-nav{height:100%;max-height:100%;position:static}.picker-browser .browser-results{flex-direction:column;min-height:0;max-height:100%;display:flex}.picker-list{flex:1;padding-right:7px;overflow:auto;max-height:none!important}.picker-card-heading{color:#7890af;justify-content:space-between;align-items:center;gap:15px;margin-bottom:14px;font-size:11px;display:flex}.picker-card-heading .button{flex-shrink:0;min-height:34px;padding:6px 10px;font-size:12px}.picker-done{border-top:1px solid #e1e8f2;justify-content:space-between;align-items:center;margin-top:16px;padding-top:16px;font-size:12px;display:flex}.picker-list .question-content img,.picker-list .diagram-view{max-width:220px;max-height:180px}.picker-list .question-content{font-size:14px}.danger-button{color:#fff;background:#ba3e40}.paper-card .card-actions>div{flex-wrap:wrap}.field .smart-select .select-trigger{font-size:13px}.figure-panel details>summary{cursor:pointer;color:#6680a1;font-size:12px}.note{line-height:1.8}@media (width<=1100px){.question-browser{grid-template-columns:220px minmax(0,1fr);gap:14px}.paper-workspace{grid-template-columns:250px minmax(0,1fr)}.filter-bar>.smart-select{min-width:135px}.question-card{padding:18px}.picker-browser{grid-template-columns:210px minmax(0,1fr)}}@media (width<=760px){.question-browser{display:block}.curriculum-nav{max-height:320px;margin-bottom:18px;position:static}.paper-workspace,.paper-controls{display:block}.paper-sheet.overview{grid-template-columns:repeat(2,minmax(0,1fr))!important}.job-row{flex-wrap:wrap}.job-row .job-actions{flex-direction:row;flex-basis:100%}.job-row>div:not(.job-actions){flex-basis:70%}.picker-browser{flex-direction:column;height:65vh;display:flex}.picker-browser .curriculum-nav{flex-shrink:0;width:100%;height:180px}.picker-browser .browser-results{flex:1;width:100%;min-height:0}.formula-guide>button{grid-template-columns:60px 1fr 55px 35px}.print-preview .pdf-frame{height:65vh;min-height:480px}.question-content{font-size:15px}.batch-stats{flex-wrap:wrap}.help-tip>[role=tooltip]{left:0;transform:translate(-30%)}.paper-controls .panel{width:100%}}.browser-results>details.panel.compact{border-radius:12px;margin:0 0 12px;padding:12px 16px}.browser-results>.search-box{margin-bottom:12px}.browser-results>.results-bar{margin:16px 0}.browser-results>.inline-actions{margin:12px 0}.browser-results>.filter-bar{margin-bottom:8px}.question-card-foot .text-link{display:none}.question-card-foot .tags{font-size:11px}.figure-panel .notice{display:block}.editor-meta>.truncate{max-width:45%}.modal.drawer .paper-controls{display:block}.pdf-pages{background:#e8edf3;border-radius:12px;padding:16px}.pdf-zoom{justify-content:space-between;align-items:center;gap:16px;margin-bottom:12px;font-size:12px;display:flex}.pdf-zoom label{align-items:center;gap:8px;display:flex}.pdf-zoom input{width:100px}.pdf-pages-scroll{max-height:82vh;overflow:auto}.pdf-pages figure{min-width:0;margin:0 auto 22px}.pdf-pages figcaption{text-align:center;color:#526077;margin:8px;font-size:12px}.pdf-page-image{background:#fff;position:relative;box-shadow:0 2px 9px #263f601f}.pdf-page-image>span,.pdf-page-image>button{white-space:nowrap;font-size:13px;position:absolute;top:35%;left:50%;transform:translate(-50%)}.pdf-page-image img{width:100%;height:auto;display:block}.overview-stem .markdown{font-size:13px}.pdf-pages .error-box{max-width:100%}.drag-handle{touch-action:none;-webkit-user-select:none;user-select:none;flex-shrink:0;cursor:grab!important}.drag-handle:active{background:#dceafe;cursor:grabbing!important}.paper-question-tools>.drag-handle{opacity:1!important;visibility:visible!important}.profile-link{color:inherit;border-radius:10px;align-items:center;gap:9px;padding:4px 8px;text-decoration:none;display:flex}.profile-link:hover{background:#eaf2ff}.pricing-link{color:#2563d5;white-space:nowrap;font-size:13px}.sidebar{overflow-y:auto}.sidebar nav{flex-shrink:0}.sidebar-bottom{flex-shrink:0;padding-top:14px}.sidebar-help{text-align:left;color:#526681;background:#f2f6fd;border:1px solid #e3ebf8;border-radius:10px;width:100%;margin-bottom:12px;padding:10px;font-size:12px;display:block}.sidebar-tasks{background:#f7faff;border:1px solid #d9e6fa;border-radius:12px;flex-shrink:0;max-height:240px;margin:14px 6px 0;padding:12px;font-size:12px;overflow:auto}.sidebar-task{border-top:1px solid #e3ebf8;margin-top:8px;padding:9px 0}.sidebar-task>div{justify-content:space-between;gap:5px;display:flex}.sidebar-task p{overflow-wrap:anywhere;margin:6px 0;line-height:1.6}.sidebar-task a{color:#2563d5;font-size:11px}.sidebar-task small{color:#60738c;display:block}.sidebar-task.failed p{color:#975818}.sidebar-task button{background:0 0;border:0;font-size:16px}.help-popover{z-index:10000;color:#fff;white-space:normal;word-break:normal;overflow-wrap:break-word;background:#233b59;border-radius:12px;width:min(350px,100vw - 16px);max-height:min(70vh,540px);padding:16px 18px;font-size:13px;font-weight:400;line-height:1.7;position:fixed;overflow:auto;box-shadow:0 8px 28px #12233c30}.help-popover p{margin:0 0 7px}.help-popover p:last-child{margin-bottom:0}.review-actionbar{z-index:70;-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);background:#ffffffed;border:1px solid #d9e4f6;border-radius:16px;align-items:center;gap:12px;padding:12px 18px;display:flex;position:fixed;bottom:16px;left:calc(50% + 100px);transform:translate(-50%);box-shadow:0 6px 30px #19325120}.review-actionbar span{color:#61728a;white-space:nowrap;font-size:12px}.workspace:has(.review-actionbar){padding-bottom:110px}.formula-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:12px;display:grid}.formula-example{text-align:left;background:#fff;border:1px solid #dce6f5;border-radius:12px;flex-direction:column;align-items:flex-start;gap:8px;min-width:0;padding:16px;display:flex;overflow:hidden}.formula-example:hover{background:#f8fbff;border-color:#4285f4}.formula-example>span{max-width:100%;font-size:16px;overflow:auto}.formula-example code{word-break:break-all;white-space:normal;color:#53657c;font-size:12px}.formula-example small{color:#286bce}.formula-search input{width:100%;margin:16px 0 10px}.formula-search .volume-tabs{flex-wrap:wrap}.formula-prompt{white-space:pre-wrap;font-family:monospace;line-height:1.7}.library-cover{height:auto;min-height:72px;padding:18px!important}.library-tools{gap:16px;margin-bottom:12px;display:flex}.library-card{flex-direction:column;gap:10px;display:flex}.library-card>p{margin:0}.library-card h2{margin:8px 0 0}.library-card .card-actions{margin-top:auto}.library-card .tags{margin-bottom:8px}.library-card-meta{margin:10px 0}.notice{color:#526983;background:#f4f8ff;border-radius:10px;padding:12px 14px;font-size:13px;line-height:1.7}.product-demo{max-width:1160px;margin:70px auto;padding:0 24px}.demo-window{background:#f5f8ff;border:1px solid #dbe5f3;border-radius:22px;overflow:hidden;box-shadow:0 18px 60px #233d6410}.demo-titlebar{background:#fff;border-bottom:1px solid #e1e9f4;justify-content:space-between;align-items:center;padding:18px 24px;font-size:13px;display:flex}.demo-titlebar>span{color:#adc0da;letter-spacing:4px}.demo-titlebar button{color:#386cc0;background:#fff;border:1px solid #dbe5f3;border-radius:8px;padding:6px 12px}.demo-workspace{grid-template-columns:190px 1fr;min-height:420px;display:grid}.demo-workspace>aside{background:#fff;border-right:1px solid #e1e9f4;padding:24px 14px}.demo-workspace>aside button{color:#62758f;background:0 0;border:0;border-radius:10px;gap:12px;width:100%;margin-bottom:8px;padding:16px 12px;font-size:14px;display:flex}.demo-workspace .active{color:#2463ca;background:#e8f0fe!important}.demo-screen{padding:30px;animation:.5s ease-out demo-enter}.demo-screen h3{margin:16px 0 8px;font-size:24px}.demo-screen>p{color:#65758c;font-size:14px}.demo-drop{color:#4478c8;background:#fff;border:2px dashed #b9ceef;border-radius:14px;flex-direction:column;justify-content:center;align-items:center;gap:12px;height:160px;margin-top:24px;display:flex}.demo-drop>span{color:#6e829e;font-size:13px}.demo-progress{background:#dfe9f8;border-radius:4px;height:5px;margin:20px 0}.demo-progress i{background:#4285f4;width:95%;height:100%;animation:5s ease-out demo-progress;display:block}.demo-confirm{margin-top:20px;font-size:13px;color:#25816b!important}.demo-compare{grid-template-columns:1fr 1fr;gap:18px;margin-top:24px;display:grid}.demo-paper{background:#fff;border:1px solid #e0e6ee;min-height:230px;padding:22px;font-size:13px;line-height:1.9;box-shadow:0 4px 12px #25446908}.demo-paper small{color:#8591a3;font-size:11px}.demo-paper h4{text-align:center;font-size:16px}.demo-answer{color:#25836a;background:#eaf7f1;border-radius:8px;padding:10px;font-size:12px;display:block}.demo-tree{padding:15px 4px;font-size:13px}.demo-tree p{border-radius:8px;padding:10px}.demo-writing{height:55px}.demo-caption{color:#7b8ba3;background:#fff;padding:14px 24px;font-size:12px}.paused *{animation-play-state:paused!important}@keyframes demo-enter{0%{opacity:.4;transform:translateY(8px)}to{opacity:1;transform:translateY(0)}}@keyframes demo-progress{0%{width:3%}to{width:95%}}@media (height<=850px) and (width>=801px){.sidebar{padding-top:15px}.sidebar>.brand{margin-bottom:18px}.create-button{margin-bottom:14px}.sidebar nav a{padding:9px 14px}.sidebar-tasks{max-height:150px}.sidebar-bottom>small{margin-bottom:8px}}@media (width<=800px){.review-actionbar{justify-content:flex-end;bottom:10px;left:12px;right:12px;transform:none}.review-actionbar span{white-space:normal;margin-right:auto}.profile-link>span:last-child{text-overflow:ellipsis;white-space:nowrap;max-width:90px;overflow:hidden}.formula-grid,.demo-workspace{grid-template-columns:1fr}.demo-workspace>aside{padding:8px;display:flex;overflow:auto}.demo-workspace>aside button{min-width:120px;margin:0;padding:10px;font-size:12px}.demo-screen{padding:18px}.demo-titlebar>span{display:none}.demo-compare{gap:8px}.demo-paper{padding:10px;font-size:11px}.product-demo{padding:0 12px}.help-popover{max-height:55vh}.sidebar-tasks{max-height:200px}}@media (prefers-reduced-motion:reduce){.demo-window *{animation:none!important}}.sidebar{overflow:hidden}.sidebar nav{flex:auto;min-height:100px;overflow-y:auto}.sidebar-bottom{margin-top:10px}.formula-example>span{width:100%;display:block;overflow:auto hidden}.library-card .tags .pill{white-space:normal;line-height:1.6}.paused .demo-screen{opacity:1;transform:none;animation:none!important}.demo-confirm{animation:1s ease-out .6s both demo-confirm}@keyframes demo-confirm{0%{opacity:0;transform:translateY(5px)}to{opacity:1;transform:translateY(0)}}.paused .demo-confirm{animation:none!important}.scope-editor,.classification-card{border:1px solid var(--line,#dfe6f1);background:#f8faff;border-radius:16px;gap:16px;margin:12px 0 20px;padding:20px;display:grid}.scope-editor>label,.classification-card>label{line-height:1.8;display:block}.scope-editor .select-wrap{margin-top:7px}.scope-choices{background:#fff;border:1px solid #e1e8f3;border-radius:12px;max-height:320px;padding:12px;overflow:auto}.scope-choices summary{cursor:pointer;padding:10px;font-weight:600}.scope-choices .check-label{align-items:flex-start;gap:8px;padding:7px;font-size:13px;line-height:1.6;display:flex}.catalog-cross{flex-wrap:wrap;margin:10px 0;font-size:12px;line-height:1.6}.catalog-source{text-align:left;background:#fff;border:0;border-bottom:1px solid #e9edf5;flex-wrap:wrap;justify-content:space-between;align-items:center;gap:5px;width:100%;padding:13px 10px;display:flex}.catalog-source>span{text-overflow:ellipsis;white-space:nowrap;max-width:100%;overflow:hidden}.catalog-source>small{color:#7e8da3}.catalog-source.active{color:#2266d9;background:#eaf2ff}.classification-card .tags button{white-space:normal;text-align:left}.curriculum-nav details details summary>button{text-align:left;width:100%;color:inherit;font:inherit;background:0 0;border:0;justify-content:space-between;gap:8px;padding:7px;display:flex}.curriculum-nav details details summary{padding:7px 0}.curriculum-nav small{white-space:nowrap}.help-tip{vertical-align:middle;align-self:center;max-width:23px;height:23px;line-height:1;overflow:visible;flex:0 0 23px!important;width:23px!important;display:inline-flex!important}.help-tip>[role=button]{cursor:help;color:#7186a4;border-radius:50%;justify-content:center;align-items:center;width:23px;height:23px;display:inline-flex}.help-tip>[role=button]:hover,.help-tip>[role=button]:focus-visible{color:#2463ca;outline-offset:1px;background:#e9f1ff;outline:2px solid #c2d6f6}.help-popover{color:#35465d;background:#fff;border:1px solid #d9e3f1;font-size:13px;line-height:1.8;box-shadow:0 8px 30px #1e365a20}.toast,.toast.error{color:#30567f;z-index:1200;background:#fff;border:1px solid #dbe6f4;max-width:min(580px,100vw - 32px);padding:13px 18px;font-size:14px;top:22px;bottom:auto;box-shadow:0 8px 30px #20385c18}.toast.error{color:#9e3e35;background:snow;border-color:#efd6d1}.toast button{color:inherit;flex-shrink:0}.sidebar-tasks{box-shadow:none;background:0 0;border:0;border-top:1px solid #e3ebf6;border-radius:0;max-height:170px;margin:12px 0 0;padding:14px 4px;overflow:auto}.task-summary-heading{color:#687e98;align-items:center;gap:6px;font-size:11px;display:flex}.task-summary-heading a{margin-left:auto;font-size:11px}.task-dot{background:#4a89e8;border-radius:50%;width:6px;height:6px}.sidebar-task{border:0;margin:0;padding:9px 0 0}.sidebar-task p{color:#61738c;margin:5px 0;font-size:12px;line-height:1.6}.sidebar-task b{color:#36536f;font-size:12px}.sidebar-task>a{font-size:11px}.sidebar-task small{font-size:10px}.sidebar-task>div{align-items:center}.sidebar-task.done b{color:#3b7e6c}.review-notices{color:#83652b;background:#fffbf2;border:1px solid #eddfbd;border-radius:12px;margin:0 0 18px;padding:12px 16px}.review-notices summary{cursor:pointer;font-size:13px;font-weight:600}.review-notices summary span{margin-left:8px;font-size:12px;font-weight:400}.review-notices ul{max-height:220px;margin:12px 0 0;padding-left:19px;font-size:13px;line-height:1.9;overflow:auto}.review-notices li+li{margin-top:6px}.button.danger,.button.danger-button{color:#fff;background:#ba443c;border:1px solid #ba443c}.button.danger:hover,.button.danger-button:hover{background:#a83831}.button:disabled,.button.danger:disabled,.button.danger-button:disabled{opacity:1;color:#8591a3;box-shadow:none;cursor:not-allowed;background:#edf1f6;border-color:#e0e6ee}input::placeholder,textarea::placeholder{color:#a3adbb}.catalog-all.active{color:#2563c9;background:#e8f1ff;border:1px solid #c8dcff;font-weight:650;box-shadow:inset 3px 0 #3478de}.directory-list{max-height:52vh;padding:1px 6px 1px 1px;overflow:auto}.directory-node{background:#fff;border:1px solid #e0e8f3;border-radius:12px;margin:0 0 10px}.directory-node summary{cursor:pointer;flex-wrap:wrap;align-items:center;gap:10px;padding:15px;display:flex}.directory-node summary strong{flex:1;min-width:160px;font-size:14px;line-height:1.6}.directory-node summary small{color:#7b8b9f;font-size:11px}.directory-node[open] summary{background:#f6f9ff;border-bottom:1px solid #e3ebf7;border-radius:12px 12px 0 0}.directory-fields{grid-template-columns:1fr 1fr;gap:0 18px;padding:18px 18px 0;display:grid}.directory-fields>.field:nth-child(n+3){grid-column:1/-1}.directory-fields textarea{min-height:85px}.directory-actions{justify-content:space-between;padding:0 18px 16px;display:flex}.directory-actions button{align-items:center;gap:5px;display:flex}.paper-sheet.overview{align-items:stretch}.overview .paper-question{flex-direction:column;gap:10px;height:340px;padding:14px;display:flex;overflow:visible}.overview .paper-question-tools{flex-wrap:wrap;flex-shrink:0;gap:7px;margin:0}.paper-question-tools>div{opacity:1;visibility:visible}.overview .paper-question-tools>strong{font-size:14px}.overview .paper-question>div:last-of-type{flex:1;min-height:0;overflow:hidden}.overview-content{overscroll-behavior:contain;cursor:auto;height:100%;padding:3px 4px 12px;overflow:auto}.overview-content .question-content{font-size:13px}.paper-question{transition:border-color .18s,box-shadow .18s;position:relative}.paper-question.drop-before:before,.paper-question.drop-after:after{content:"";z-index:2;background:#3278e3;border-radius:6px;height:4px;position:absolute;left:0;right:0;box-shadow:0 0 0 3px #dbe9ff}.paper-question.drop-before:before{top:-8px}.paper-question.drop-after:after{bottom:-8px}.paper-question.just-moved{animation:1.3s ease-out placed}.drag-handle{touch-action:none;cursor:grab}.drag-handle:active{cursor:grabbing}@keyframes placed{0%,35%{background:#e6f1ff;box-shadow:0 0 0 3px #b9d5ff}to{background:#fff}}.question-content.sized-figures .diagram-view{max-height:none;width:var(--image-width)!important;max-width:100%!important}.question-content.sized-figures .diagram-view svg{width:100%;max-height:none}.question-content.sized-figures img{width:var(--image-width);object-fit:contain;max-width:100%;height:auto;max-height:none}.paper-inspector{z-index:60;background:#fff;border:1px solid #dce6f4;border-radius:16px;width:310px;padding:18px;position:fixed;top:100px;bottom:20px;right:18px;overflow:auto;box-shadow:0 8px 26px #253f6514}.paper-inspector>header{justify-content:space-between;align-items:center;margin-bottom:18px;display:flex}.paper-inspector .muted{font-size:12px;line-height:1.7}.paper-inspector .form-grid{grid-template-columns:1fr 1fr;gap:12px}.paper-inspector .field{margin-bottom:15px}.live-preview{background:#e9eef5;border-radius:12px;min-width:0;max-height:80vh;padding:12px;position:relative;overflow:auto}.live-caption{z-index:2;color:#426184;background:#f8faffed;border:1px solid #dbe5f4;border-radius:8px;margin:0 0 16px;padding:9px 12px;font-size:12px;position:sticky;top:0;left:0}.live-caption span{color:#7e8ca0;margin-top:4px;font-size:11px;display:block}.live-measure{visibility:hidden;pointer-events:none;position:fixed;top:0;left:-20000px}.live-measure,.live-page{color:#111;font-family:Noto Serif CJK SC,Songti SC,SimSun,serif}.live-pages{grid-template-columns:max-content;justify-content:center;gap:20px;display:grid}.live-pages.a3{grid-template-columns:repeat(2,max-content);column-gap:0}.live-page{background:#fff;flex-shrink:0;position:relative;overflow:hidden;box-shadow:0 4px 16px #25364c15}.live-page footer{text-align:center;color:#667;font-size:9pt;position:absolute;bottom:9mm;left:0;right:0}.live-page .live-watermark{opacity:.07;pointer-events:none;font-size:35pt;position:absolute;top:45%;left:15%;transform:rotate(-25deg)}.live-header h1{text-align:center;margin:0 0 5mm;font-size:18pt}.live-meta{text-align:center;border-bottom:1px solid #555;margin:0 0 7mm;padding:0 0 4mm}.live-header small{font-size:8pt}.live-measure .question-content,.live-page .question-content{line-height:inherit;color:#111;font-size:inherit!important}.live-measure h2,.live-page h2{margin:5mm 0 3mm;font-size:12pt}.live-measure p,.live-page p{margin:1mm 0}.live-measure .answer,.live-page .answer{color:#111;background:0 0;margin-top:3mm;padding:0}.live-number{display:block}.live-piece{cursor:pointer}.live-piece:hover{outline-offset:-1px;background:#fafcff;outline:1px solid #95b8f1}.live-block .question-options{gap:4mm 9mm;margin:3mm 0}.live-measure .diagram-view,.live-page .diagram-view{margin:3mm 0}.live-page .answer-space,.live-measure .answer-space{margin:0}.live-block .question-content .material{margin:4mm 0}@media (width<=1250px){.paper-canvas.with-inspector{margin-right:0}.paper-inspector{width:285px;max-height:55vh;top:auto;bottom:12px}.paper-canvas.with-inspector .live-preview{padding-bottom:240px}}@media (width<=680px){.directory-fields{grid-template-columns:1fr}.directory-fields>.field{grid-column:1}.paper-inspector{width:auto;max-height:45vh;left:12px;right:12px}.overview .paper-question{height:330px}.live-preview{max-height:75vh}.toast{top:12px}.sidebar-tasks{max-height:150px}}@media (prefers-reduced-motion:reduce){.just-moved{animation:none!important}}.safari-demo{max-width:1240px}.safari-window{background:#f5f7fb;border:1px solid #d5dce5;border-radius:16px;overflow:hidden;box-shadow:0 28px 80px #233a5c17,0 3px 12px #233a5c0c}.safari-bar{color:#707781;background:linear-gradient(#f8f9fb,#eef0f3);align-items:center;gap:18px;height:54px;padding:0 20px;display:flex}.traffic{gap:7px;margin-right:6px;display:flex}.traffic i{background:#ff6259;border-radius:50%;width:11px;height:11px;box-shadow:inset 0 0 0 1px #0001}.traffic i:nth-child(2){background:#ffbd2e}.traffic i:nth-child(3){background:#28c840}.safari-address{color:#59616d;background:#fff9;border:1px solid #d8dce4;border-radius:8px;justify-content:center;align-items:center;gap:8px;width:52%;height:30px;margin:0 auto;font-size:12px;display:flex}.safari-address span{color:#8f98a4;margin-left:43%;position:absolute}.safari-tab{color:#606a78;background:#e8ebef;border-top:1px solid #e2e5e9;justify-content:center;align-items:center;gap:6px;height:29px;font-size:10px;display:flex}.safari-tab .brand-mark{width:12px;height:12px}.safari-app{grid-template-columns:162px minmax(0,1fr);height:560px;display:grid;overflow:hidden}.safari-nav{background:#fff;border-right:1px solid #e5ebf3;padding:22px 12px;position:relative}.demo-brand{align-items:center;gap:8px;padding:0 6px 24px;font-size:15px;display:flex}.demo-brand .brand-mark{width:27px;height:27px}.demo-brand small{color:#93a3bb;letter-spacing:2px;margin-top:4px;font-size:8px;display:block}.safari-nav>div:not(.demo-brand){color:#8291a8;border-radius:9px;align-items:center;gap:10px;margin:5px 0;padding:13px 12px;font-size:12px;display:flex}.safari-nav>small{color:#9aa8bc;font-size:9px;position:absolute;bottom:22px;left:20px}.safari-app .selected{background:#eaf2ff;border-radius:8px;color:#286bd4!important}.safari-content{padding:0 28px 24px;animation:.4s demo-enter;position:relative;overflow:hidden}.demo-breadcrumb{color:#91a0b7;border-bottom:1px solid #e9eef6;align-items:center;gap:12px;height:48px;margin:0 -28px 24px;padding:0 28px;font-size:10px;display:flex}.demo-avatar{color:#80a1d4;background:#e8f0fd;border-radius:50%;margin-left:auto;padding:7px}.safari-content h3{margin:0 0 8px;font-size:22px}.scene-description{color:#75859c;margin:0 0 22px;font-size:12px}.safari-upload{color:#6b8ebe;background:#fff;border:1px dashed #bdd0ee;border-radius:14px;flex-direction:column;align-items:center;gap:15px;padding:28px;display:flex}.safari-upload strong{color:#354761;font-size:17px}.safari-upload>span,.safari-upload small{color:#8a98ad;font-size:11px}.safari-upload>div:not(.demo-progress){color:#506580;border:1px solid #e3eaf4;border-radius:10px;align-items:center;gap:15px;width:85%;padding:18px;font-size:12px;display:flex}.safari-upload b{color:#368b70;margin-left:auto;font-size:10px}.safari-upload .demo-progress{width:85%;margin:0}.safari-review{grid-template-columns:1fr 1fr;gap:18px;display:grid}.demo-source,.demo-result{background:#fff;border:1px solid #e0e8f4;border-radius:12px;min-width:0;padding:18px;font-size:11px;line-height:1.65}.demo-source header,.demo-result header{color:#334762;justify-content:space-between;align-items:center;margin-bottom:14px;font-weight:600;display:flex}.demo-source header small,.demo-result header small{color:#93a1b7;font-size:8px;font-weight:400}.demo-source h4{text-align:center;margin:16px 0;font-size:14px}.demo-source img{object-fit:contain;filter:grayscale();width:70%;height:175px;margin:10px auto;display:block}.demo-source>small{text-align:center;color:#8c9ab0;font-size:9px;display:block}.safari-review .markdown p,.safari-pick .markdown p{margin:3px 0}.demo-options{color:#52637b;grid-template-columns:1fr 1fr;gap:3px;margin:8px 0;font-size:10px;display:grid}.demo-figure{border:1px solid #edf1f7;border-radius:8px;height:155px;margin:8px 0;position:relative;overflow:hidden}.demo-figure>span{color:#8593a8;font-size:9px;position:absolute;top:7px;left:8px}.demo-figure>img{object-fit:contain;width:100%;height:100%}.demo-figure .diagram-view{height:150px;margin:0!important}.demo-figure .diagram-view>svg{width:100%!important;height:150px!important}.demo-action{color:#2c69c8;background:#edf4ff;border-radius:7px;justify-content:center;align-items:center;gap:6px;padding:8px 12px;font-size:10px;font-weight:600;display:flex}.demo-result .demo-answer{margin-top:7px;padding:7px;font-size:10px}.demo-result .demo-answer small{font-size:8px;display:block}.safari-pick{grid-template-columns:180px minmax(0,1fr);gap:16px;display:grid}.demo-catalog{background:#fff;border:1px solid #e1e9f5;border-radius:12px;padding:18px;font-size:11px}.demo-catalog p{color:#7d8ca3;padding:8px 0}.demo-catalog .selected{padding:12px 10px}.demo-catalog small{margin-top:4px;font-size:9px;display:block}.safari-pick .diagram-view{max-height:215px;margin:10px auto}.safari-pick .diagram-view>svg{width:100%!important;max-height:210px!important}.demo-chips{gap:6px;margin-bottom:14px;display:flex}.demo-chips span{color:#6482a6;background:#f2f6fc;border-radius:5px;padding:3px 7px;font-size:9px}.safari-layout{grid-template-columns:145px minmax(0,1fr);gap:18px;display:grid}.demo-layout-controls{background:#fff;border:1px solid #e3eaf4;border-radius:10px;padding:15px;font-size:10px}.demo-layout-controls strong{margin-bottom:18px;display:block}.demo-layout-controls label{color:#8191a8;margin:12px 0;font-size:9px;display:block}.demo-layout-controls b{color:#4f6483;background:#f9fbff;border:1px solid #e2eaf5;border-radius:6px;margin-top:5px;padding:7px;font-size:10px;font-weight:400;display:block}.demo-slider{background:#e7eef8;border-radius:4px;height:4px}.demo-slider i{background:#4285f4;width:45%;height:4px;display:block}.demo-print-pages{background:#e9eef5;border-radius:10px;justify-content:center;gap:0;min-height:370px;padding:15px;display:flex;overflow:hidden}.demo-print-paper{background:#fff;flex-shrink:1;width:225px;height:335px;padding:15px 18px;font-family:Songti SC,serif;font-size:9px;position:relative;box-shadow:0 2px 6px #25436515}.demo-print-paper h4{text-align:center;margin:0 0 8px;font-size:12px}.demo-print-paper>small{font-size:7px}.demo-print-paper hr{border:0;border-top:1px solid #789;margin:8px 0}.demo-print-paper .diagram-view{max-height:115px}.demo-print-paper .diagram-view>svg{width:100%!important;height:115px!important}.demo-print-paper footer{text-align:center;color:#7a869a;font-size:7px;position:absolute;bottom:12px;left:0;right:0}.demo-print-pages.spread .demo-print-paper{border-right:1px dashed #d4dce7;width:50%;padding:15px 12px;font-size:8px}.demo-ruled{background:repeating-linear-gradient(#fff 0 17px,#dbe2ec 17px 18px);height:35px}.demo-ruled.large{height:75px}.demo-cursor{z-index:5;filter:drop-shadow(0 2px 2px #22334c40);pointer-events:none;animation:4.8s ease-in-out infinite cursor-intent;position:absolute;top:77%;left:72%}.cursor-0{top:55%;left:55%}.cursor-4{top:79%;left:76%}.cursor-5,.cursor-6{top:57%;left:18%}.cursor-7{top:80%;left:18%}@keyframes cursor-intent{0%{transform:translate(38px,30px)}35%{transform:translate(0)}45%{transform:scale(.85)}55%,85%{transform:scale(1)}to{transform:translate(8px,5px)}}.demo-playbar{justify-content:space-between;align-items:center;gap:12px;padding:20px 0 4px;display:flex}.demo-playbar>div{flex-wrap:wrap;gap:8px;display:flex}.demo-playbar button{color:#75869e;background:0 0;border:1px solid #0000;border-radius:9px;padding:9px 13px;font-size:12px}.demo-playbar button.active{color:#286bd4;background:#eaf2ff}.demo-playbar .demo-play{white-space:nowrap;border-color:#dce5f2;align-items:center;gap:6px;display:flex}.safari-demo>.demo-caption{color:#8c9bb0;background:0 0;padding:8px 0;font-size:11px;line-height:1.7}.live-page .question-options{gap:4mm 9mm;margin:3mm 0}.live-page .question-content .material{margin:4mm 0}.live-page .live-piece h2:first-child{margin-top:5mm}.live-pages.a3 .live-page:nth-child(odd){border-right:1px dashed #b9c5d6}@media (width<=800px){.safari-app{grid-template-columns:100px minmax(0,1fr);height:500px}.safari-nav{padding:16px 5px}.demo-brand{padding:0 2px 15px;font-size:11px}.demo-brand .brand-mark{width:20px;height:20px}.safari-nav>div:not(.demo-brand){gap:5px;padding:11px 6px;font-size:9px}.safari-content{padding:0 14px 18px}.safari-review{gap:8px}.demo-source,.demo-result{padding:10px;font-size:9px}.demo-source img{height:130px}.safari-content h3{font-size:18px}.scene-description{font-size:10px}.safari-layout,.safari-pick{grid-template-columns:100px 1fr;gap:8px}.demo-catalog{padding:10px;font-size:9px}.safari-bar{gap:10px;padding:0 12px}.safari-bar>svg:nth-last-child(-n+2){display:none}.safari-address{width:55%}.safari-address span{display:none}.demo-print-pages{padding:7px}.demo-print-paper{font-size:7px}.demo-playbar button{padding:8px;font-size:10px}.safari-nav>small{font-size:7px;left:8px}}@media (prefers-reduced-motion:reduce){.safari-window *{animation:none!important}}.paused .safari-content{opacity:1;animation:none!important}.paper-canvas.with-inspector{margin-right:0}.paper-controls{align-self:stretch}.paper-controls .paper-inspector{width:100%;max-height:calc(100vh - 40px);box-shadow:none;z-index:5;padding:18px;position:sticky;inset:20px auto auto}.paper-controls>div[hidden]{display:none!important}.paper-canvas.with-inspector .live-preview{padding-bottom:12px}.paper-canvas{animation:none!important}.live-zoom{color:#5d7290;justify-content:space-between;align-items:center;gap:10px;margin-bottom:10px;font-size:11px;display:flex}.live-zoom label{align-items:center;gap:10px;display:flex}.live-zoom input{width:100px}.live-zoom button{color:#50709c;background:#fff;border:1px solid #d8e3f1;border-radius:6px;padding:5px 8px}.live-pages{justify-content:start;width:max-content;min-width:100%}@media (width<=680px){.paper-controls .paper-inspector{max-height:48vh;position:relative;top:0}.paper-controls:has(.paper-inspector){display:block}}@media (width<=480px){.safari-app{grid-template-columns:minmax(0,1fr);height:570px}.safari-nav{display:none}.safari-content{padding:0 10px 16px;overflow:auto}.demo-breadcrumb{margin:0 -10px 18px;padding:0 10px}.safari-bar>svg{display:none}.safari-address{flex:1;width:auto}.safari-upload{padding:24px 14px}.safari-upload>div:not(.demo-progress){gap:8px;width:100%;padding:12px}.safari-upload strong{font-size:15px}.demo-source header,.demo-result header{display:block}.demo-source header small,.demo-result header small{margin-top:4px;display:block}.demo-source h4{font-size:11px}.demo-source img{width:100%}.safari-layout,.safari-pick{grid-template-columns:78px minmax(0,1fr)}.demo-layout-controls{padding:8px}.demo-print-paper{width:100%;padding:10px 8px}.demo-print-pages.spread{flex-wrap:wrap;max-height:380px;overflow:auto}.demo-print-pages.spread .demo-print-paper{flex-shrink:0;width:100%}}.field input[type=checkbox],.classification-card input[type=checkbox],.scope-choices input[type=checkbox]{flex:0 0 17px;align-self:flex-start;min-width:17px;margin:4px 0;padding:0;width:17px!important}.classification-card .check-label,.scope-choices .check-label{white-space:normal;justify-content:flex-start;align-items:flex-start;gap:10px;display:flex}.scope-choices .check-label>span{overflow-wrap:anywhere;flex:1;min-width:0}.scope-choices small{color:#687a91;margin-top:4px;font-weight:400;display:block}.classification-paths{gap:9px;margin:20px 0;display:grid}.classification-path{color:#243a56;background:#fff;border:1px solid #dce5f1;border-radius:10px;gap:5px;padding:12px 14px;display:grid}.classification-path small{color:#64758b}.paper-question-tools{flex-wrap:wrap;justify-content:flex-start;align-items:center;gap:10px;display:flex!important}.paper-question-tools>.drag-handle{order:0}.paper-question-tools>strong{order:1;flex:0 auto!important;margin:0!important}.paper-question-tools>.edit-item-button{order:2}.paper-question-tools>div{order:3;margin-left:auto}.edit-item-button.active{color:#1761da;background:#e9f1ff;border-radius:8px;box-shadow:inset 0 0 0 1px #9dc2ff}.global-paper-controls{gap:18px;display:grid}.paper-inspector{margin-bottom:20px;position:relative!important}.layout-presets{border-top:1px solid #e0e8f2;margin-top:20px;padding-top:12px}.layout-presets h4{justify-content:space-between;display:flex}.layout-presets input{width:100%;margin:10px 0}.preset-list{flex-wrap:wrap;gap:7px;display:flex}.preset-list>div{background:#eef4ff;border-radius:9px;display:flex}.preset-list button{color:#215ca9;padding:8px}.preset-list button+button{border-left:1px solid #d9e5fa}.live-measure .answer,.live-page .answer,.paper-sheet .answer{border:1px solid #333;border-radius:0;margin-top:12px;padding:9px 12px;color:#111!important;background:0 0!important}.live-measure .answer small,.live-page .answer small,.paper-sheet .answer small{font-weight:700;color:#111!important}.analysis-title{border-top:1px dashed #555;margin-top:8px;padding-top:6px;display:block}.live-page.blank-page{background:#fff}.live-page .diagram-view svg{filter:grayscale()}.safari-content{opacity:1;transition:opacity .22s,transform .22s;transform:translateY(0);animation:none!important}.safari-content.scene-fading{opacity:0;transform:translateY(5px)}.demo-cursor{transition:left .65s,top .65s;animation:none}.demo-print-pages{align-items:flex-start;min-height:0;overflow:hidden}.demo-print-paper{aspect-ratio:210/297;flex:none;width:210px;max-width:100%;overflow:hidden;height:auto!important}.demo-print-pages.spread{align-items:stretch;flex-wrap:nowrap!important}.demo-print-pages.spread .demo-print-paper{aspect-ratio:210/297;flex:0 0 50%;min-width:0;padding:12px 10px;font-size:7px;width:50%!important;height:auto!important}.demo-print-pages.spread .demo-print-paper .diagram-view>svg{height:80px!important}.demo-print-pages.spread h4{font-size:9px}.demo-print-pages.spread .demo-ruled.large{height:48px}.public-header nav{gap:20px}.user-menu{gap:8px}.user-menu>.pricing-link{color:#41678f;background:#edf3fd;border-radius:9px;padding:8px 12px;font-size:13px}.user-menu>.pricing-link:hover{color:#175fc8;background:#dfebfc}.toolbox-nav{color:#526b89;align-items:center;gap:7px;padding:10px 4px;font-size:12px;display:flex}.toolbox-nav small{color:#8192a8;font-size:10px}.guide-page{max-width:1060px;margin:0 auto;padding:28px 24px 80px}.guide-header{justify-content:space-between;align-items:center;gap:20px;display:flex}.guide-intro{margin:48px 0 30px}.guide-grid{gap:24px;display:grid}.guide-step{background:#fff;border:1px solid #e1e9f4;border-radius:22px;grid-template-columns:1fr 1fr;gap:30px;padding:28px;display:grid}.guide-step h2{font-size:21px}.guide-step p{color:#65788f;line-height:1.9}.guide-visual{background:#f4f7fc;border-radius:14px;align-content:center;gap:12px;padding:22px;display:grid}.guide-node{color:#42628e;background:#fff;border:1px solid #dbe6f5;border-radius:9px;padding:12px}.guide-path{color:#3075cd;font-size:13px}.guide-paper{aspect-ratio:210/297;color:#222;background:#fff;border:1px solid #d6dfeb;width:110px;padding:10px;font-size:10px;box-shadow:0 5px 10px #30466c12}.guide-paper i{border-bottom:1px solid #bbc4d0;height:22px;display:block}.guide-spread{justify-content:center;display:flex}.guide-tag{color:#32715c;font-size:12px}.public-footer{flex-wrap:wrap;gap:20px}@media (width<=680px){.public-header{flex-wrap:wrap;gap:15px}.public-header nav{flex-wrap:wrap;gap:12px;display:flex}.public-header nav>a:not(.button){display:block!important}.user-menu{flex-wrap:wrap;gap:4px}.user-menu>.pricing-link{padding:7px;font-size:12px}.profile-link>span:last-child{display:none}.guide-step{grid-template-columns:1fr;gap:15px;padding:20px}.guide-header{flex-wrap:wrap}.safari-content{overflow:hidden!important}.safari-layout{grid-template-columns:70px minmax(0,1fr)}.demo-print-paper{padding:10px 6px!important;font-size:6px!important}.demo-print-paper h4{font-size:8px}.demo-print-paper .diagram-view>svg{height:65px!important}.demo-print-pages{padding:6px}.demo-print-pages.spread .demo-print-paper{padding:6px 4px!important;font-size:4.5px!important}.demo-print-pages.spread h4{font-size:6px}.demo-print-pages.spread .demo-print-paper .diagram-view>svg{height:40px!important}.demo-print-paper footer{font-size:4px;bottom:4px}.demo-ruled.large{height:30px!important}.demo-print-pages.spread{max-height:none!important;overflow:hidden!important}.demo-print-paper>small{font-size:5px}}@media (prefers-reduced-motion:reduce){.safari-content,.demo-cursor{transition:none!important}}.toolbox-frame{border:0;width:100%;height:100dvh;display:block}.source-loading{color:#6d809c;background:#f7f9fd;border-radius:14px;place-content:center;min-height:300px;display:grid}.paper-print .answer img,.paper-print .answer svg{filter:grayscale()}.live-piece{position:relative}.live-edit-button{z-index:2;display:none;position:absolute;top:0;right:0;box-shadow:0 2px 8px #2343;background:#fff!important;font:14px sans-serif!important}.live-piece:hover .live-edit-button,.live-piece:focus-within .live-edit-button{display:block}.guide-screenshot{border:1px solid #dce5f2;border-radius:12px;width:100%;height:auto;display:block;box-shadow:0 5px 18px #24446c0b}.guide-visual>a{width:100%;display:block}.guide-image-button{cursor:zoom-in;background:0 0;border:0;width:100%;padding:0;display:block}.guide-lightbox{background:#fff;border:0;border-radius:18px;width:min(1280px,96vw);max-width:96vw;max-height:94dvh;padding:0;box-shadow:0 24px 90px #11243d40}.guide-lightbox::backdrop{background:#162438a6}.guide-lightbox-inner>header{border-bottom:1px solid #dce5f2;justify-content:space-between;align-items:center;gap:12px;padding:16px 20px;display:flex}.guide-lightbox-inner>header button{flex-shrink:0}.guide-lightbox-scroll{max-height:calc(94dvh - 70px);padding:12px;overflow:auto}.guide-lightbox-scroll img{width:100%;height:auto;display:block}.guide-lightbox:not([open]){display:none}@font-face{font-display:block;font-family:KaTeX_AMS;font-style:normal;font-weight:400;src:url(/assets/KaTeX_AMS-Regular-BQhdFMY1.woff2)format("woff2"),url(/assets/KaTeX_AMS-Regular-DMm9YOAa.woff)format("woff"),url(/assets/KaTeX_AMS-Regular-DRggAlZN.ttf)format("truetype")}@font-face{font-display:block;font-family:KaTeX_Caligraphic;font-style:normal;font-weight:700;src:url(/assets/KaTeX_Caligraphic-Bold-Dq_IR9rO.woff2)format("woff2"),url(/assets/KaTeX_Caligraphic-Bold-BEiXGLvX.woff)format("woff"),url(/assets/KaTeX_Caligraphic-Bold-ATXxdsX0.ttf)format("truetype")}@font-face{font-display:block;font-family:KaTeX_Caligraphic;font-style:normal;font-weight:400;src:url(/assets/KaTeX_Caligraphic-Regular-Di6jR-x-.woff2)format("woff2"),url(/assets/KaTeX_Caligraphic-Regular-CTRA-rTL.woff)format("woff"),url(/assets/KaTeX_Caligraphic-Regular-wX97UBjC.ttf)format("truetype")}@font-face{font-display:block;font-family:KaTeX_Fraktur;font-style:normal;font-weight:700;src:url(/assets/KaTeX_Fraktur-Bold-CL6g_b3V.woff2)format("woff2"),url(/assets/KaTeX_Fraktur-Bold-BsDP51OF.woff)format("woff"),url(/assets/KaTeX_Fraktur-Bold-BdnERNNW.ttf)format("truetype")}@font-face{font-display:block;font-family:KaTeX_Fraktur;font-style:normal;font-weight:400;src:url(/assets/KaTeX_Fraktur-Regular-CTYiF6lA.woff2)format("woff2"),url(/assets/KaTeX_Fraktur-Regular-Dxdc4cR9.woff)format("woff"),url(/assets/KaTeX_Fraktur-Regular-CB_wures.ttf)format("truetype")}@font-face{font-display:block;font-family:KaTeX_Main;font-style:normal;font-weight:700;src:url(/assets/KaTeX_Main-Bold-Cx986IdX.woff2)format("woff2"),url(/assets/KaTeX_Main-Bold-Jm3AIy58.woff)format("woff"),url(/assets/KaTeX_Main-Bold-waoOVXN0.ttf)format("truetype")}@font-face{font-display:block;font-family:KaTeX_Main;font-style:italic;font-weight:700;src:url(/assets/KaTeX_Main-BoldItalic-DxDJ3AOS.woff2)format("woff2"),url(/assets/KaTeX_Main-BoldItalic-SpSLRI95.woff)format("woff"),url(/assets/KaTeX_Main-BoldItalic-DzxPMmG6.ttf)format("truetype")}@font-face{font-display:block;font-family:KaTeX_Main;font-style:italic;font-weight:400;src:url(/assets/KaTeX_Main-Italic-NWA7e6Wa.woff2)format("woff2"),url(/assets/KaTeX_Main-Italic-BMLOBm91.woff)format("woff"),url(/assets/KaTeX_Main-Italic-3WenGoN9.ttf)format("truetype")}@font-face{font-display:block;font-family:KaTeX_Main;font-style:normal;font-weight:400;src:url(/assets/KaTeX_Main-Regular-B22Nviop.woff2)format("woff2"),url(/assets/KaTeX_Main-Regular-Dr94JaBh.woff)format("woff"),url(/assets/KaTeX_Main-Regular-ypZvNtVU.ttf)format("truetype")}@font-face{font-display:block;font-family:KaTeX_Math;font-style:italic;font-weight:700;src:url(/assets/KaTeX_Math-BoldItalic-CZnvNsCZ.woff2)format("woff2"),url(/assets/KaTeX_Math-BoldItalic-iY-2wyZ7.woff)format("woff"),url(/assets/KaTeX_Math-BoldItalic-B3XSjfu4.ttf)format("truetype")}@font-face{font-display:block;font-family:KaTeX_Math;font-style:italic;font-weight:400;src:url(/assets/KaTeX_Math-Italic-t53AETM-.woff2)format("woff2"),url(/assets/KaTeX_Math-Italic-DA0__PXp.woff)format("woff"),url(/assets/KaTeX_Math-Italic-flOr_0UB.ttf)format("truetype")}@font-face{font-display:block;font-family:KaTeX_SansSerif;font-style:normal;font-weight:700;src:url(/assets/KaTeX_SansSerif-Bold-D1sUS0GD.woff2)format("woff2"),url(/assets/KaTeX_SansSerif-Bold-DbIhKOiC.woff)format("woff"),url(/assets/KaTeX_SansSerif-Bold-CFMepnvq.ttf)format("truetype")}@font-face{font-display:block;font-family:KaTeX_SansSerif;font-style:italic;font-weight:400;src:url(/assets/KaTeX_SansSerif-Italic-C3H0VqGB.woff2)format("woff2"),url(/assets/KaTeX_SansSerif-Italic-DN2j7dab.woff)format("woff"),url(/assets/KaTeX_SansSerif-Italic-YYjJ1zSn.ttf)format("truetype")}@font-face{font-display:block;font-family:KaTeX_SansSerif;font-style:normal;font-weight:400;src:url(/assets/KaTeX_SansSerif-Regular-DDBCnlJ7.woff2)format("woff2"),url(/assets/KaTeX_SansSerif-Regular-CS6fqUqJ.woff)format("woff"),url(/assets/KaTeX_SansSerif-Regular-BNo7hRIc.ttf)format("truetype")}@font-face{font-display:block;font-family:KaTeX_Script;font-style:normal;font-weight:400;src:url(/assets/KaTeX_Script-Regular-D3wIWfF6.woff2)format("woff2"),url(/assets/KaTeX_Script-Regular-D5yQViql.woff)format("woff"),url(/assets/KaTeX_Script-Regular-C5JkGWo-.ttf)format("truetype")}@font-face{font-display:block;font-family:KaTeX_Size1;font-style:normal;font-weight:400;src:url(/assets/KaTeX_Size1-Regular-mCD8mA8B.woff2)format("woff2"),url(/assets/KaTeX_Size1-Regular-C195tn64.woff)format("woff"),url(/assets/KaTeX_Size1-Regular-Dbsnue_I.ttf)format("truetype")}@font-face{font-display:block;font-family:KaTeX_Size2;font-style:normal;font-weight:400;src:url(/assets/KaTeX_Size2-Regular-Dy4dx90m.woff2)format("woff2"),url(/assets/KaTeX_Size2-Regular-oD1tc_U0.woff)format("woff"),url(/assets/KaTeX_Size2-Regular-B7gKUWhC.ttf)format("truetype")}@font-face{font-display:block;font-family:KaTeX_Size3;font-style:normal;font-weight:400;src:url(data:font/woff2;base64,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)format("woff2"),url(/assets/KaTeX_Size3-Regular-CTq5MqoE.woff)format("woff"),url(/assets/KaTeX_Size3-Regular-DgpXs0kz.ttf)format("truetype")}@font-face{font-display:block;font-family:KaTeX_Size4;font-style:normal;font-weight:400;src:url(/assets/KaTeX_Size4-Regular-Dl5lxZxV.woff2)format("woff2"),url(/assets/KaTeX_Size4-Regular-BF-4gkZK.woff)format("woff"),url(/assets/KaTeX_Size4-Regular-DWFBv043.ttf)format("truetype")}@font-face{font-display:block;font-family:KaTeX_Typewriter;font-style:normal;font-weight:400;src:url(/assets/KaTeX_Typewriter-Regular-CO6r4hn1.woff2)format("woff2"),url(/assets/KaTeX_Typewriter-Regular-C0xS9mPB.woff)format("woff"),url(/assets/KaTeX_Typewriter-Regular-D3Ib7_Hf.ttf)format("truetype")}.katex{text-indent:0;text-rendering:auto;font:1.21em/1.2 KaTeX_Main,math,Times New Roman,serif;position:relative}.katex *{border-color:currentColor;-ms-high-contrast-adjust:none!important}.katex .katex-version:after{content:"0.19.1"}.katex .katex-mathml{clip-path:inset(50%);border:0;width:1px;height:1px;padding:0;position:absolute;overflow:hidden}.katex .katex-html>.katex-newline{display:block}.katex .katex-base{white-space:nowrap;width:min-content;position:relative}.katex .katex-base,.katex .katex-strut{display:inline-block}.katex .textbf{font-weight:700}.katex .textit{font-style:italic}.katex .textrm{font-family:KaTeX_Main}.katex .textsf{font-family:KaTeX_SansSerif}.katex .texttt{font-family:KaTeX_Typewriter}.katex .mathnormal{font-family:KaTeX_Math;font-style:italic}.katex .mathit{font-family:KaTeX_Main;font-style:italic}.katex .mathrm{font-style:normal}.katex .mathbf{font-family:KaTeX_Main;font-weight:700}.katex .boldsymbol{font-family:KaTeX_Math;font-style:italic;font-weight:700}.katex .amsrm,.katex .mathbb,.katex .textbb{font-family:KaTeX_AMS}.katex .mathcal{font-family:KaTeX_Caligraphic}.katex .mathfrak,.katex .textfrak{font-family:KaTeX_Fraktur}.katex .mathboldfrak,.katex .textboldfrak{font-family:KaTeX_Fraktur;font-weight:700}.katex .mathtt{font-family:KaTeX_Typewriter}.katex .mathscr,.katex .textscr{font-family:KaTeX_Script}.katex .mathsf,.katex .textsf{font-family:KaTeX_SansSerif}.katex .mathboldsf,.katex .textboldsf{font-family:KaTeX_SansSerif;font-weight:700}.katex .mathitsf,.katex .mathsfit,.katex .textitsf{font-family:KaTeX_SansSerif;font-style:italic}.katex .mainrm{font-family:KaTeX_Main;font-style:normal}.katex .vlist-t{border-collapse:collapse;table-layout:fixed;display:inline-table}.katex .vlist-r{display:table-row}.katex .vlist{vertical-align:bottom;display:table-cell;position:relative}.katex .vlist>span{height:0;display:block;position:relative}.katex .vlist>span>span{display:inline-block}.katex .vlist>span>.pstrut{width:0;overflow:hidden}.katex .vlist-t2{margin-right:-2px}.katex .vlist-s{vertical-align:bottom;width:2px;min-width:2px;font-size:1px;display:table-cell}.katex .katex-vbox{flex-direction:column;align-items:baseline;display:inline-flex}.katex .katex-thinbox{flex-direction:row;width:0;max-width:0;display:inline-flex}.katex .msupsub{text-align:left}.katex .mfrac>span>span{text-align:center}.katex .mfrac .frac-line{border-bottom-style:solid;width:100%;display:inline-block}.katex .katex-hdashline,.katex .katex-hline,.katex .katex-overline .overline-line,.katex .katex-rule,.katex .katex-underline .underline-line,.katex .mfrac .frac-line{min-height:1px}.katex .mspace{display:inline-block}.katex .katex-smash{line-height:0;display:inline}.katex .clap,.katex .llap,.katex .rlap{width:0;position:relative}.katex .clap>.katex-inner,.katex .llap>.katex-inner,.katex .rlap>.katex-inner{position:absolute}.katex .clap>.katex-fix,.katex .llap>.katex-fix,.katex .rlap>.katex-fix{display:inline-block}.katex .llap>.katex-inner{right:0}.katex .clap>.katex-inner,.katex .rlap>.katex-inner{left:0}.katex .clap>.katex-inner>span{margin-left:-50%;margin-right:50%}.katex .katex-rule{border:0 solid;display:inline-block;position:relative}.katex .katex-hline,.katex .katex-overline .overline-line,.katex .katex-underline .underline-line{border-bottom-style:solid;width:100%;display:inline-block}.katex .katex-hdashline{border-bottom-style:dashed;width:100%;display:inline-block}.katex .sqrt>.katex-root{margin-left:.277778em;margin-right:-.555556em}.katex .fontsize-ensurer.reset-size1.size1,.katex .katex-sizing.reset-size1.size1{font-size:1em}.katex .fontsize-ensurer.reset-size1.size2,.katex .katex-sizing.reset-size1.size2{font-size:1.2em}.katex .fontsize-ensurer.reset-size1.size3,.katex .katex-sizing.reset-size1.size3{font-size:1.4em}.katex .fontsize-ensurer.reset-size1.size4,.katex .katex-sizing.reset-size1.size4{font-size:1.6em}.katex .fontsize-ensurer.reset-size1.size5,.katex .katex-sizing.reset-size1.size5{font-size:1.8em}.katex .fontsize-ensurer.reset-size1.size6,.katex .katex-sizing.reset-size1.size6{font-size:2em}.katex .fontsize-ensurer.reset-size1.size7,.katex .katex-sizing.reset-size1.size7{font-size:2.4em}.katex .fontsize-ensurer.reset-size1.size8,.katex .katex-sizing.reset-size1.size8{font-size:2.88em}.katex .fontsize-ensurer.reset-size1.size9,.katex .katex-sizing.reset-size1.size9{font-size:3.456em}.katex .fontsize-ensurer.reset-size1.size10,.katex .katex-sizing.reset-size1.size10{font-size:4.148em}.katex .fontsize-ensurer.reset-size1.size11,.katex .katex-sizing.reset-size1.size11{font-size:4.976em}.katex .fontsize-ensurer.reset-size2.size1,.katex .katex-sizing.reset-size2.size1{font-size:.833333em}.katex .fontsize-ensurer.reset-size2.size2,.katex .katex-sizing.reset-size2.size2{font-size:1em}.katex .fontsize-ensurer.reset-size2.size3,.katex .katex-sizing.reset-size2.size3{font-size:1.16667em}.katex .fontsize-ensurer.reset-size2.size4,.katex .katex-sizing.reset-size2.size4{font-size:1.33333em}.katex .fontsize-ensurer.reset-size2.size5,.katex .katex-sizing.reset-size2.size5{font-size:1.5em}.katex .fontsize-ensurer.reset-size2.size6,.katex .katex-sizing.reset-size2.size6{font-size:1.66667em}.katex .fontsize-ensurer.reset-size2.size7,.katex .katex-sizing.reset-size2.size7{font-size:2em}.katex .fontsize-ensurer.reset-size2.size8,.katex .katex-sizing.reset-size2.size8{font-size:2.4em}.katex .fontsize-ensurer.reset-size2.size9,.katex .katex-sizing.reset-size2.size9{font-size:2.88em}.katex .fontsize-ensurer.reset-size2.size10,.katex .katex-sizing.reset-size2.size10{font-size:3.45667em}.katex .fontsize-ensurer.reset-size2.size11,.katex .katex-sizing.reset-size2.size11{font-size:4.14667em}.katex .fontsize-ensurer.reset-size3.size1,.katex .katex-sizing.reset-size3.size1{font-size:.714286em}.katex .fontsize-ensurer.reset-size3.size2,.katex .katex-sizing.reset-size3.size2{font-size:.857143em}.katex .fontsize-ensurer.reset-size3.size3,.katex .katex-sizing.reset-size3.size3{font-size:1em}.katex .fontsize-ensurer.reset-size3.size4,.katex .katex-sizing.reset-size3.size4{font-size:1.14286em}.katex .fontsize-ensurer.reset-size3.size5,.katex .katex-sizing.reset-size3.size5{font-size:1.28571em}.katex .fontsize-ensurer.reset-size3.size6,.katex .katex-sizing.reset-size3.size6{font-size:1.42857em}.katex .fontsize-ensurer.reset-size3.size7,.katex .katex-sizing.reset-size3.size7{font-size:1.71429em}.katex .fontsize-ensurer.reset-size3.size8,.katex .katex-sizing.reset-size3.size8{font-size:2.05714em}.katex .fontsize-ensurer.reset-size3.size9,.katex .katex-sizing.reset-size3.size9{font-size:2.46857em}.katex .fontsize-ensurer.reset-size3.size10,.katex .katex-sizing.reset-size3.size10{font-size:2.96286em}.katex .fontsize-ensurer.reset-size3.size11,.katex .katex-sizing.reset-size3.size11{font-size:3.55429em}.katex .fontsize-ensurer.reset-size4.size1,.katex .katex-sizing.reset-size4.size1{font-size:.625em}.katex .fontsize-ensurer.reset-size4.size2,.katex .katex-sizing.reset-size4.size2{font-size:.75em}.katex .fontsize-ensurer.reset-size4.size3,.katex .katex-sizing.reset-size4.size3{font-size:.875em}.katex .fontsize-ensurer.reset-size4.size4,.katex .katex-sizing.reset-size4.size4{font-size:1em}.katex .fontsize-ensurer.reset-size4.size5,.katex .katex-sizing.reset-size4.size5{font-size:1.125em}.katex .fontsize-ensurer.reset-size4.size6,.katex .katex-sizing.reset-size4.size6{font-size:1.25em}.katex .fontsize-ensurer.reset-size4.size7,.katex .katex-sizing.reset-size4.size7{font-size:1.5em}.katex .fontsize-ensurer.reset-size4.size8,.katex .katex-sizing.reset-size4.size8{font-size:1.8em}.katex .fontsize-ensurer.reset-size4.size9,.katex .katex-sizing.reset-size4.size9{font-size:2.16em}.katex .fontsize-ensurer.reset-size4.size10,.katex .katex-sizing.reset-size4.size10{font-size:2.5925em}.katex .fontsize-ensurer.reset-size4.size11,.katex .katex-sizing.reset-size4.size11{font-size:3.11em}.katex .fontsize-ensurer.reset-size5.size1,.katex .katex-sizing.reset-size5.size1{font-size:.555556em}.katex .fontsize-ensurer.reset-size5.size2,.katex .katex-sizing.reset-size5.size2{font-size:.666667em}.katex .fontsize-ensurer.reset-size5.size3,.katex .katex-sizing.reset-size5.size3{font-size:.777778em}.katex .fontsize-ensurer.reset-size5.size4,.katex .katex-sizing.reset-size5.size4{font-size:.888889em}.katex .fontsize-ensurer.reset-size5.size5,.katex .katex-sizing.reset-size5.size5{font-size:1em}.katex .fontsize-ensurer.reset-size5.size6,.katex .katex-sizing.reset-size5.size6{font-size:1.11111em}.katex .fontsize-ensurer.reset-size5.size7,.katex .katex-sizing.reset-size5.size7{font-size:1.33333em}.katex .fontsize-ensurer.reset-size5.size8,.katex .katex-sizing.reset-size5.size8{font-size:1.6em}.katex .fontsize-ensurer.reset-size5.size9,.katex .katex-sizing.reset-size5.size9{font-size:1.92em}.katex .fontsize-ensurer.reset-size5.size10,.katex .katex-sizing.reset-size5.size10{font-size:2.30444em}.katex .fontsize-ensurer.reset-size5.size11,.katex .katex-sizing.reset-size5.size11{font-size:2.76444em}.katex .fontsize-ensurer.reset-size6.size1,.katex .katex-sizing.reset-size6.size1{font-size:.5em}.katex .fontsize-ensurer.reset-size6.size2,.katex .katex-sizing.reset-size6.size2{font-size:.6em}.katex .fontsize-ensurer.reset-size6.size3,.katex .katex-sizing.reset-size6.size3{font-size:.7em}.katex .fontsize-ensurer.reset-size6.size4,.katex .katex-sizing.reset-size6.size4{font-size:.8em}.katex .fontsize-ensurer.reset-size6.size5,.katex .katex-sizing.reset-size6.size5{font-size:.9em}.katex .fontsize-ensurer.reset-size6.size6,.katex .katex-sizing.reset-size6.size6{font-size:1em}.katex .fontsize-ensurer.reset-size6.size7,.katex .katex-sizing.reset-size6.size7{font-size:1.2em}.katex .fontsize-ensurer.reset-size6.size8,.katex .katex-sizing.reset-size6.size8{font-size:1.44em}.katex .fontsize-ensurer.reset-size6.size9,.katex .katex-sizing.reset-size6.size9{font-size:1.728em}.katex .fontsize-ensurer.reset-size6.size10,.katex .katex-sizing.reset-size6.size10{font-size:2.074em}.katex .fontsize-ensurer.reset-size6.size11,.katex .katex-sizing.reset-size6.size11{font-size:2.488em}.katex .fontsize-ensurer.reset-size7.size1,.katex .katex-sizing.reset-size7.size1{font-size:.416667em}.katex .fontsize-ensurer.reset-size7.size2,.katex .katex-sizing.reset-size7.size2{font-size:.5em}.katex .fontsize-ensurer.reset-size7.size3,.katex .katex-sizing.reset-size7.size3{font-size:.583333em}.katex .fontsize-ensurer.reset-size7.size4,.katex .katex-sizing.reset-size7.size4{font-size:.666667em}.katex .fontsize-ensurer.reset-size7.size5,.katex .katex-sizing.reset-size7.size5{font-size:.75em}.katex .fontsize-ensurer.reset-size7.size6,.katex .katex-sizing.reset-size7.size6{font-size:.833333em}.katex .fontsize-ensurer.reset-size7.size7,.katex .katex-sizing.reset-size7.size7{font-size:1em}.katex .fontsize-ensurer.reset-size7.size8,.katex .katex-sizing.reset-size7.size8{font-size:1.2em}.katex .fontsize-ensurer.reset-size7.size9,.katex .katex-sizing.reset-size7.size9{font-size:1.44em}.katex .fontsize-ensurer.reset-size7.size10,.katex .katex-sizing.reset-size7.size10{font-size:1.72833em}.katex .fontsize-ensurer.reset-size7.size11,.katex .katex-sizing.reset-size7.size11{font-size:2.07333em}.katex .fontsize-ensurer.reset-size8.size1,.katex .katex-sizing.reset-size8.size1{font-size:.347222em}.katex .fontsize-ensurer.reset-size8.size2,.katex .katex-sizing.reset-size8.size2{font-size:.416667em}.katex .fontsize-ensurer.reset-size8.size3,.katex .katex-sizing.reset-size8.size3{font-size:.486111em}.katex .fontsize-ensurer.reset-size8.size4,.katex .katex-sizing.reset-size8.size4{font-size:.555556em}.katex .fontsize-ensurer.reset-size8.size5,.katex .katex-sizing.reset-size8.size5{font-size:.625em}.katex .fontsize-ensurer.reset-size8.size6,.katex .katex-sizing.reset-size8.size6{font-size:.694444em}.katex .fontsize-ensurer.reset-size8.size7,.katex .katex-sizing.reset-size8.size7{font-size:.833333em}.katex .fontsize-ensurer.reset-size8.size8,.katex .katex-sizing.reset-size8.size8{font-size:1em}.katex .fontsize-ensurer.reset-size8.size9,.katex .katex-sizing.reset-size8.size9{font-size:1.2em}.katex .fontsize-ensurer.reset-size8.size10,.katex .katex-sizing.reset-size8.size10{font-size:1.44028em}.katex .fontsize-ensurer.reset-size8.size11,.katex .katex-sizing.reset-size8.size11{font-size:1.72778em}.katex .fontsize-ensurer.reset-size9.size1,.katex .katex-sizing.reset-size9.size1{font-size:.289352em}.katex .fontsize-ensurer.reset-size9.size2,.katex .katex-sizing.reset-size9.size2{font-size:.347222em}.katex .fontsize-ensurer.reset-size9.size3,.katex .katex-sizing.reset-size9.size3{font-size:.405093em}.katex .fontsize-ensurer.reset-size9.size4,.katex .katex-sizing.reset-size9.size4{font-size:.462963em}.katex .fontsize-ensurer.reset-size9.size5,.katex .katex-sizing.reset-size9.size5{font-size:.520833em}.katex .fontsize-ensurer.reset-size9.size6,.katex .katex-sizing.reset-size9.size6{font-size:.578704em}.katex .fontsize-ensurer.reset-size9.size7,.katex .katex-sizing.reset-size9.size7{font-size:.694444em}.katex .fontsize-ensurer.reset-size9.size8,.katex .katex-sizing.reset-size9.size8{font-size:.833333em}.katex .fontsize-ensurer.reset-size9.size9,.katex .katex-sizing.reset-size9.size9{font-size:1em}.katex .fontsize-ensurer.reset-size9.size10,.katex .katex-sizing.reset-size9.size10{font-size:1.20023em}.katex .fontsize-ensurer.reset-size9.size11,.katex .katex-sizing.reset-size9.size11{font-size:1.43981em}.katex .fontsize-ensurer.reset-size10.size1,.katex .katex-sizing.reset-size10.size1{font-size:.24108em}.katex .fontsize-ensurer.reset-size10.size2,.katex .katex-sizing.reset-size10.size2{font-size:.289296em}.katex .fontsize-ensurer.reset-size10.size3,.katex .katex-sizing.reset-size10.size3{font-size:.337512em}.katex .fontsize-ensurer.reset-size10.size4,.katex .katex-sizing.reset-size10.size4{font-size:.385728em}.katex .fontsize-ensurer.reset-size10.size5,.katex .katex-sizing.reset-size10.size5{font-size:.433944em}.katex .fontsize-ensurer.reset-size10.size6,.katex .katex-sizing.reset-size10.size6{font-size:.48216em}.katex .fontsize-ensurer.reset-size10.size7,.katex .katex-sizing.reset-size10.size7{font-size:.578592em}.katex .fontsize-ensurer.reset-size10.size8,.katex .katex-sizing.reset-size10.size8{font-size:.694311em}.katex .fontsize-ensurer.reset-size10.size9,.katex .katex-sizing.reset-size10.size9{font-size:.833173em}.katex .fontsize-ensurer.reset-size10.size10,.katex .katex-sizing.reset-size10.size10{font-size:1em}.katex .fontsize-ensurer.reset-size10.size11,.katex .katex-sizing.reset-size10.size11{font-size:1.19961em}.katex .fontsize-ensurer.reset-size11.size1,.katex .katex-sizing.reset-size11.size1{font-size:.200965em}.katex .fontsize-ensurer.reset-size11.size2,.katex .katex-sizing.reset-size11.size2{font-size:.241158em}.katex .fontsize-ensurer.reset-size11.size3,.katex .katex-sizing.reset-size11.size3{font-size:.281351em}.katex .fontsize-ensurer.reset-size11.size4,.katex .katex-sizing.reset-size11.size4{font-size:.321543em}.katex .fontsize-ensurer.reset-size11.size5,.katex .katex-sizing.reset-size11.size5{font-size:.361736em}.katex .fontsize-ensurer.reset-size11.size6,.katex .katex-sizing.reset-size11.size6{font-size:.401929em}.katex .fontsize-ensurer.reset-size11.size7,.katex .katex-sizing.reset-size11.size7{font-size:.482315em}.katex .fontsize-ensurer.reset-size11.size8,.katex .katex-sizing.reset-size11.size8{font-size:.578778em}.katex .fontsize-ensurer.reset-size11.size9,.katex .katex-sizing.reset-size11.size9{font-size:.694534em}.katex .fontsize-ensurer.reset-size11.size10,.katex .katex-sizing.reset-size11.size10{font-size:.833601em}.katex .fontsize-ensurer.reset-size11.size11,.katex .katex-sizing.reset-size11.size11{font-size:1em}.katex .delimsizing.size1{font-family:KaTeX_Size1}.katex .delimsizing.size2{font-family:KaTeX_Size2}.katex .delimsizing.size3{font-family:KaTeX_Size3}.katex .delimsizing.size4{font-family:KaTeX_Size4}.katex .delimsizing.mult .delim-size1>span{font-family:KaTeX_Size1}.katex .delimsizing.mult .delim-size4>span{font-family:KaTeX_Size4}.katex .nulldelimiter{width:.12em;display:inline-block}.katex .delimcenter,.katex .op-symbol{position:relative}.katex .op-symbol.small-op{font-family:KaTeX_Size1}.katex .op-symbol.large-op{font-family:KaTeX_Size2}.katex .katex-accent>.vlist-t,.katex .op-limits>.vlist-t{text-align:center}.katex .katex-accent .accent-body{position:relative}.katex .katex-accent .accent-body:not(.accent-full){width:0}.katex .katex-overlay{display:block}.katex .mtable .vertical-separator{min-width:1px;display:inline-block}.katex .mtable .arraycolsep{display:inline-block}.katex .mtable .col-align-c>.vlist-t{text-align:center}.katex .mtable .col-align-l>.vlist-t{text-align:left}.katex .mtable .col-align-r>.vlist-t{text-align:right}.katex .svg-align{text-align:left}.katex svg{fill:currentColor;stroke:currentColor;height:inherit;width:100%;display:block;position:absolute}.katex svg path{stroke:none}.katex svg{fill-rule:nonzero;fill-opacity:1;stroke-width:1px;stroke-linecap:butt;stroke-linejoin:miter;stroke-miterlimit:4;stroke-dasharray:none;stroke-dashoffset:0;stroke-opacity:1}.katex img{border-style:none;min-width:0;max-width:none;min-height:0;max-height:none}.katex .katex-stretchy{width:100%;display:block;position:relative;overflow:hidden}.katex .katex-stretchy:after,.katex .katex-stretchy:before{content:""}.katex .hide-tail{width:100%;position:relative;overflow:hidden}.katex .halfarrow-left{width:50.2%;position:absolute;left:0;overflow:hidden}.katex .halfarrow-right{width:50.2%;position:absolute;right:0;overflow:hidden}.katex .brace-left{width:25.1%;position:absolute;left:0;overflow:hidden}.katex .brace-center{width:50%;position:absolute;left:25%;overflow:hidden}.katex .brace-right{width:25.1%;position:absolute;right:0;overflow:hidden}.katex .x-arrow-pad{padding:0 .5em}.katex .cd-arrow-pad{padding:0 .55556em 0 .27778em}.katex .mover,.katex .munder,.katex .x-arrow{text-align:center}.katex .boxpad{padding:0 .3em}.katex .fbox,.katex .fcolorbox{box-sizing:border-box;border:.04em solid}.katex .cancel-pad{padding:0 .2em}.katex .cancel-lap{margin-left:-.2em;margin-right:-.2em}.katex .katex-sout{border-bottom-style:solid;border-bottom-width:.08em}.katex .angl{box-sizing:border-box;border-top:.049em solid;border-right:.049em solid;margin-right:.03889em}.katex .anglpad{padding:0 .03889em}.katex .reflectbox{display:inline-block;transform:scaleX(-1)}.katex .eqn-num:before{content:"(" counter(katexEqnNo) ")";counter-increment:katexEqnNo}.katex .mml-eqn-num:before{content:"(" counter(mmlEqnNo) ")";counter-increment:mmlEqnNo}.katex .mtr-glue{width:50%}.katex .cd-vert-arrow{display:inline-block;position:relative}.katex .cd-label-left{text-align:left;display:inline-block;position:absolute;right:calc(50% + .3em)}.katex .cd-label-right{text-align:right;display:inline-block;position:absolute;left:calc(50% + .3em)}.katex-display{text-align:center;margin:1em 0;display:block}.katex-display>.katex{text-align:center;white-space:nowrap;display:block}.katex-display>.katex>.katex-html{display:block;position:relative}.katex-display>.katex>.katex-html>.katex-tag{position:absolute;right:0}.katex-display.leqno>.katex>.katex-html>.katex-tag{left:0;right:auto}.katex-display.fleqn>.katex{text-align:left;padding-left:2em}body{counter-reset:katexEqnNo mmlEqnNo}
