:root{font-family:Inter,-apple-system,BlinkMacSystemFont,"Segoe UI",Arial,sans-serif;font-size:14px;color:#2d3543;background:#fff;--line:#e9eaee;--muted:#8c929d;--accent:#5865ce}*{box-sizing:border-box}body{margin:0}button,a,select{touch-action:manipulation}button,input,select{font:inherit}button{cursor:pointer;border:1px solid #dddfe6;padding:8px 12px;background:#fff;color:inherit;border-radius:6px}button:hover{background:#f4f5f8}a{color:inherit;text-decoration:none}button:focus-visible,a:focus-visible,input:focus-visible,select:focus-visible{outline:2px solid var(--accent);outline-offset:2px}input,select{border:1px solid #e1e3e9;padding:8px 11px;border-radius:5px;background:#fff;color:inherit}h1,h2,h3,p{margin-top:0}.primary{background:#2b3548;border-color:#2b3548;color:white}.primary:hover{background:#414c62}.muted{color:var(--muted)}#sidebar{width:272px;position:fixed;inset:0 auto 0 0;background:#f7f7f9;border-right:1px solid var(--line);display:flex;flex-direction:column;padding:24px 15px 16px}.brand{display:flex;align-items:center;gap:11px;padding:0 10px 26px;font-size:18px;font-weight:700;letter-spacing:.5px}.brand-mark{background:#2b3548;color:#f3c47c;width:33px;height:36px;display:grid;place-items:center;border-radius:7px;font-size:23px}.brand div span{font-size:10px;display:block;letter-spacing:0;color:#9298a2;margin-top:5px;font-weight:400}.board-link{display:flex;gap:10px;align-items:center;padding:12px 13px;border-radius:6px;font-size:12px;font-weight:550}.board-link.active{background:#e9eaf2;color:#4754ae}.board-link>span:first-child{font-size:17px}.shortcut{margin-left:auto;color:#9b9fb0}.nav-label{font-size:9px;font-weight:600;letter-spacing:1.2px;color:#a1a5af;margin:30px 12px 14px}#lessons-nav{overflow:auto;flex:1}.lesson-nav{margin-bottom:7px}.lesson-row{display:flex;gap:8px;align-items:center;padding:10px 9px;border-radius:6px}.lesson-row:hover{background:#eeeff3}.lesson-number{width:23px;height:23px;border:1px solid #dee1e7;border-radius:5px;display:grid;place-items:center;font-size:10px;color:#969ca8;background:#fcfcfd}.lesson-row.active .lesson-number{background:#e4e7fb;color:#5460bd;border-color:#d8ddf4}.lesson-title{flex:1;font-size:12px;line-height:1.4}.lesson-title small{display:block;color:#9a9fa9;font-size:9px;margin-top:2px}.lesson-arrow{font-size:10px;color:#a0a5af}.nav-materials{padding:2px 0 4px 20px;margin-left:19px;border-left:1px solid #e1e3ea}.nav-material{display:flex;align-items:center;gap:8px;padding:8px 9px;margin:1px 0;font-size:11px;line-height:1.4;color:#7c8390;border-radius:5px}.nav-material:hover{color:#343e53;background:#eeeff5}.nav-material.active{background:#e9ebf6;color:#4553ae}.nav-material .file-glyph{width:16px;height:18px;font-size:7px;border-radius:3px;flex-shrink:0}.sidebar-footer{padding:17px 10px 0;margin-top:15px;border-top:1px solid var(--line);font-size:10px;color:#9199a5}.sidebar-footer a{display:block;margin-top:9px;color:#697485}.status-dot{display:inline-block;width:5px;height:5px;background:#788d73;border-radius:50%;margin-right:7px}#workspace{margin-left:272px}header{height:62px;border-bottom:1px solid var(--line);display:flex;align-items:center;padding:0 30px;gap:12px}#breadcrumbs{font-size:11px;color:#9297a2;display:flex;align-items:center;gap:12px}#breadcrumbs b{font-weight:500;color:#485367}#breadcrumbs a:hover{color:#4456ae}.course-tag{font-size:10px;color:#a1a7b1;margin-left:auto}#menu-toggle{display:none}main{padding:26px 30px 50px}.page-title{display:flex;justify-content:space-between;gap:20px;align-items:flex-start;margin-bottom:24px}.page-title h1{font-size:24px;font-weight:620;letter-spacing:-.7px;margin:0 0 7px}.page-title p{font-size:12px;color:#9197a3;margin:0;line-height:1.7}.page-actions{display:flex;gap:8px;align-items:center;flex-wrap:wrap}.page-actions button,.download{font-size:11px}.download{display:inline-flex;gap:8px;align-items:center;border:1px solid #dfe2e8;background:#fff;border-radius:6px;padding:9px 12px;white-space:nowrap}.download.primary{background:#2b3548;color:white;border-color:#2b3548}.download:hover{border-color:#b4bed0}.download .arrow{color:#9aa4b4}.state-tabs{display:flex;gap:20px;border-bottom:1px solid var(--line);margin-bottom:19px}.state-tab{border:0;border-radius:0;background:none;font-size:12px;padding:0 0 13px;color:#989eaa;display:flex;gap:8px;align-items:center;border-bottom:2px solid transparent}.state-tab.active{color:#39445a;border-bottom-color:#5e6ccd}.state-tab small{font-size:9px;color:#a1a6b0}.current-badge{font-size:8px;background:#edf0f9;color:#6f7aa0;border-radius:3px;padding:3px 5px}.board-tools{display:flex;gap:12px;align-items:center;margin-bottom:17px}.board-tools input{font-size:11px;width:230px;background:#fafafb;padding:7px 10px}.board-tools .summary{margin-left:auto;font-size:10px;color:#969eaa}.board{display:grid;grid-template-columns:repeat(4,minmax(200px,1fr));gap:15px;overflow:auto;align-items:start;padding-bottom:12px}.column{background:#f6f7f9;border-radius:7px;padding:11px;min-height:370px}.column-title{display:flex;gap:8px;align-items:center;font-size:11px;font-weight:550;margin:2px 2px 13px}.column-title i{width:7px;height:7px;border-radius:50%;background:#aab1bf}.column[data-status=doing] .column-title i{background:#dbb169}.column[data-status=review] .column-title i{background:#9a8dc7}.column[data-status=done] .column-title i{background:#84a998}.column-title span:last-child{color:#9fa7b3;font-size:10px;margin-left:auto}.card-list{min-height:270px}.card{background:#fff;border:1px solid #e4e7ed;border-radius:6px;padding:12px;margin-bottom:9px;cursor:grab;box-shadow:0 1px 2px #182c4604}.card:hover{border-color:#bcc5d7;box-shadow:0 3px 9px #33405d08}.card-id{display:flex;align-items:center;justify-content:space-between;font-size:9px;color:#9ea6b4;font-family:ui-monospace,monospace;margin-bottom:10px}.card h3{font-size:12px;font-weight:500;line-height:1.5;color:#3b465a;margin-bottom:14px}.card-tags{display:flex;align-items:center;gap:6px;margin-bottom:11px}.epic{font-size:8px;padding:3px 5px;border-radius:3px;background:color-mix(in srgb,var(--epic) 10%,white);color:var(--epic)}.blocked{font-size:8px;color:#b37964;background:#faf0eb;padding:3px 5px;border-radius:3px}.card-footer{display:flex;align-items:center;gap:6px;color:#9ba3b0;font-size:9px}.avatar{width:19px;height:19px;background:#eef0f5;border-radius:50%;display:inline-grid;place-items:center;font-size:7px;color:#7b879c;flex-shrink:0}.card-footer .comments{margin-left:auto;font-size:9px}.sortable-ghost{opacity:.3}.board-note{font-size:10px;color:#929aa8;line-height:1.7;margin:3px 0 25px;max-width:850px}.section-heading{display:flex;align-items:center;gap:10px;margin:26px 0 14px}.section-heading h2{font-size:15px;margin:0;font-weight:550}.section-heading span{font-size:10px;color:#a1a7b1}.section-heading a{margin-left:auto;font-size:11px;color:#7481ac}.artifact-table{border:1px solid var(--line);border-radius:7px;overflow:hidden}.artifact-row{display:grid;grid-template-columns:minmax(200px,1fr) 160px 110px;gap:20px;align-items:center;border-bottom:1px solid #edeef2;padding:15px 18px}.artifact-row:last-child{border:0}.artifact-row:hover{background:#fafbfc}.artifact-name{display:flex;gap:13px;align-items:center;min-width:0}.file-glyph{width:31px;height:37px;border:1px solid currentColor;border-radius:4px;display:inline-grid;place-items:center;font-size:8px;font-weight:650;color:#759d86;background:#f0f6f2}.file-glyph.document{color:#7c95bd;background:#f1f4f9}.file-glyph.image{color:#ab93bd;background:#f6f2f9}.file-glyph.spreadsheet{color:#729c82;background:#f0f6f2}.artifact-name b{display:block;font-size:12px;font-weight:500;line-height:1.5}.artifact-name small{font-size:10px;color:#9ca4b1;display:block;margin-top:3px}.artifact-lesson{font-size:10px;color:#a2a8b3}.artifact-download{justify-self:end;color:#77849b;font-size:10px;padding:5px}.artifact-download:hover{color:#465b92}.artifact-download span{margin-left:6px}.lesson-intro{font-size:12px;color:#8b94a4;line-height:1.8;max-width:800px;margin-bottom:27px}.lesson-boards{display:flex;gap:12px;margin-bottom:25px;flex-wrap:wrap}.lesson-board{display:flex;align-items:center;gap:13px;padding:16px 19px;border:1px solid #e4e7ee;border-radius:7px;min-width:250px}.lesson-board:hover{background:#f7f8fc}.lesson-board>span{font-size:25px;color:#919fba}.lesson-board b{display:block;font-size:12px;font-weight:500}.lesson-board small{display:block;font-size:10px;margin-top:5px;color:#9ba4b1}.empty{padding:40px;border:1px dashed #dfe3ea;border-radius:7px;color:#9da5b1;font-size:12px;text-align:center}.artifact-info{display:flex;align-items:center;gap:10px;flex-wrap:wrap;font-size:10px;color:#929baa;margin:-8px 0 24px}.artifact-info a{color:#7585b7}.preview{border:1px solid #e0e4eb;border-radius:7px;background:#f3f4f7;padding:30px;min-height:350px}.preview.image{display:flex;align-items:flex-start;justify-content:center}.preview.image img{max-width:100%;height:auto;box-shadow:0 2px 7px #29375113}.preview iframe{width:100%;height:75vh;border:0;background:white}.document-page{max-width:840px;margin:auto;background:white;box-shadow:0 2px 10px #263a5210;padding:65px 70px;min-height:700px;font:15px/1.85 Calibri,"Segoe UI",Arial,sans-serif;color:#303b4e}.document-page h1{font-size:29px;font-weight:550;line-height:1.3;margin-bottom:10px;letter-spacing:-.5px}.document-subtitle{font-size:11px;color:#96a0ae;margin-bottom:35px}.document-page h2{font-size:19px;line-height:1.4;margin:30px 0 12px;font-weight:550}.document-page p{margin-bottom:15px}.document-page table{border-collapse:collapse;width:100%;font-size:13px}.document-page td,.document-page th{padding:12px;border-bottom:1px solid #e7eaf0;text-align:left;vertical-align:top}.file-placeholder{text-align:center;padding:65px 20px}.file-placeholder .file-glyph{width:65px;height:80px;font-size:15px;margin-bottom:25px}.file-placeholder h2{font-size:17px}.file-placeholder p{font-size:12px;color:#969fab}.related{margin-top:30px}.present #sidebar,.present header,.present .page-actions,.present .board-tools{display:none}.present #workspace{margin:0}.present main{padding:24px}.present .preview{padding:0;border:0;background:white}.present .document-page{box-shadow:none}.exit-present{position:fixed;bottom:15px;right:18px;font-size:10px;z-index:5;box-shadow:0 2px 12px #0001}.present .artifact-section{display:none}dialog{border:1px solid #dce1e9;border-radius:10px;padding:0;width:min(650px,94vw);max-height:90vh;box-shadow:0 15px 80px #263a5525;color:inherit}dialog::backdrop{background:#1f2b3d55;backdrop-filter:blur(2px)}.dialog-top{display:flex;justify-content:space-between;align-items:center;padding:17px 24px;border-bottom:1px solid var(--line);font-size:11px;color:#929baa}.dialog-top button{border:0;padding:3px;background:none}.dialog-body{padding:25px}.dialog-body h2{font-size:21px;line-height:1.45;font-weight:550}.task-meta{display:flex;gap:12px;align-items:center;flex-wrap:wrap;margin-bottom:24px;font-size:11px}.task-meta select{font-size:11px;padding:6px 9px}.task-description{font-size:13px;line-height:1.85;color:#7c8799;white-space:pre-wrap}.comment{border-top:1px solid var(--line);padding:17px 0}.comment strong{font-size:11px;font-weight:550}.comment time{font-size:9px;color:#a1a8b3;margin-left:10px}.comment p{font-size:12px;color:#7c8798;line-height:1.7;margin:7px 0 0}#toast{display:none;position:fixed;bottom:25px;left:50%;transform:translateX(-50%);padding:12px 20px;background:#2b3548;border-radius:6px;color:white;font-size:12px;z-index:10;max-width:90vw}.saving .board{pointer-events:none;opacity:.75}@media(min-width:1600px){main{padding:32px 40px}.card h3{font-size:13px}.card-id,.card-footer{font-size:10px}.epic,.blocked{font-size:9px}.column-title{font-size:12px}}@media(max-width:1100px){#sidebar{width:235px}#workspace{margin-left:235px}main{padding:24px 22px}.board{gap:10px}.artifact-row{grid-template-columns:minmax(190px,1fr) 100px}.artifact-lesson{display:none}.document-page{padding:40px}}@media(max-width:760px){#sidebar{transform:translateX(-100%);z-index:20;width:270px;transition:transform .15s}.menu-open #sidebar{transform:translateX(0);box-shadow:0 0 0 100vmax #192c4050}#workspace{margin:0}#menu-toggle{display:block;border:0;padding:5px}header{height:55px;padding:0 14px}.course-tag{display:none}main{padding:23px 16px}.page-title{flex-wrap:wrap;gap:14px}.page-title h1{font-size:23px}.board{grid-template-columns:repeat(4,240px)}.state-tabs{gap:15px;overflow:auto}.state-tab{white-space:nowrap}.board-tools .summary{font-size:9px}.board-tools input{width:180px}.artifact-row{padding:13px 12px;gap:8px;grid-template-columns:minmax(150px,1fr) 70px}.preview{padding:10px}.document-page{padding:28px 22px}.artifact-name b{font-size:11px}.artifact-name small{font-size:9px}.artifact-info{line-height:1.7}}@media print{#sidebar,header,.page-actions,.board-tools,.state-tabs,.exit-present{display:none!important}#workspace{margin:0}main{padding:0}.preview{padding:0;border:0;background:white}.document-page{box-shadow:none;padding:0}.board{overflow:visible;grid-template-columns:repeat(4,1fr)}.card{break-inside:avoid}.artifact-section{display:none}.column{padding:5px}.card h3{font-size:10px}.artifact-info{display:none}}

#versions-nav{flex-shrink:0;max-height:52vh;overflow:auto;border-bottom:1px solid #dce1e8;padding-bottom:8px}.version-nav .lesson-number{background:#203348;color:white}.collection-hero{display:block;background:white;border:1px solid #dce1e8;border-radius:8px;margin:0 0 26px;overflow:hidden}.collection-hero img{display:block;width:100%;height:auto}
