:root{color-scheme:light;--bg:#f7f5fa;--paper:#fff;--ink:#302a3d;--muted:#6d657b;--line:#e5deed;--accent:#665082;--tint:#eee7f7;--soft:#f5f1fa;--shadow:0 8px 30px #49335d06;font-family:Inter,"Segoe UI",Arial,sans-serif;font-size:15px;line-height:1.6;color:var(--ink);background:var(--bg)}
:root[data-theme=paper]{--bg:#f8f6f1;--paper:#fffefa;--tint:#eee9dd;--soft:#f4f0e7;--accent:#67563e;--line:#e4ded0}
*{box-sizing:border-box}body{margin:0}button,input,textarea,select{font:inherit}button,a,input,select,textarea{-webkit-tap-highlight-color:transparent}button,a{touch-action:manipulation}a{color:var(--accent);text-underline-offset:4px}button,.button{display:inline-flex;align-items:center;justify-content:center;gap:8px;border:1px solid var(--line);border-radius:9px;background:var(--paper);color:var(--ink);font-weight:600;font-size:14px;padding:10px 17px;min-height:44px;cursor:pointer;text-decoration:none;line-height:1.45}button:hover,.button:hover{background:var(--tint);border-color:#b5a4cc}button:disabled{opacity:.55;cursor:default}.primary{background:var(--accent);border-color:var(--accent);color:#fff}.primary:hover{background:#55416f;color:#fff}.large{font-size:16px;padding:15px 32px;min-width:210px}.danger{color:#923b49}.muted,small,.fine{color:var(--muted)}small{font-size:12px}.fine{font-size:12px}.pre{white-space:pre-wrap;overflow-wrap:anywhere}p{margin:8px 0 18px}h1,h2,h3{line-height:1.3;margin:0 0 14px;letter-spacing:-.025em}h1{font-size:34px;font-weight:650}h2{font-size:21px;font-weight:600}h3{font-size:17px}h1:focus{outline:none}button:focus-visible,a:focus-visible,input:focus-visible,textarea:focus-visible,select:focus-visible,summary:focus-visible{outline:3px solid #9572b9;outline-offset:3px}.skip{position:fixed;left:15px;top:-70px;z-index:99;background:var(--paper);padding:12px}.skip:focus{top:12px}.sidebar{position:fixed;inset:0 auto 0 0;width:233px;background:#f0ebf7;border-right:1px solid var(--line);padding:32px 19px;display:flex;flex-direction:column;overflow-y:auto}.brand{display:flex;gap:12px;align-items:center;text-decoration:none;color:var(--ink);font-size:23px;font-weight:650;line-height:1.15;padding:0 14px}.brand-icon{font-family:Georgia,serif;display:grid;place-items:center;background:#ddd1ed;color:#594372;border-radius:13px;width:44px;height:49px;font-size:32px}.brand-sub{display:block;font-size:13px;font-weight:400;letter-spacing:.03em;margin-top:5px}.nav-caption{font-size:9px;letter-spacing:.16em;color:#796a8b;margin:39px 13px 12px}nav{display:flex;flex-direction:column;gap:3px}nav a{display:flex;align-items:center;gap:12px;text-decoration:none;color:#665a74;padding:10px 14px;border-radius:9px;font-size:13px;min-height:41px}nav a>span{font-size:18px;width:19px;text-align:center}nav a[aria-current=page]{color:#513b6e;background:#e2d7f0;font-weight:650}nav a:hover{background:#e8dff2}.sidebar-note{font-size:11px;color:var(--muted);margin:28px 14px 0;padding-top:20px;border-top:1px solid #ded4e8}.sidebar-note p{margin:12px 0 0;font-size:12px;line-height:1.9}.tiny-dot{display:inline-block;width:6px;height:6px;border-radius:50%;background:#88749c;margin-right:6px}.main-shell{margin-left:233px}.topbar{height:77px;border-bottom:1px solid var(--line);display:flex;align-items:center;justify-content:space-between;padding:0 45px}.topbar>span:first-child{font-size:10px;color:var(--muted);letter-spacing:.17em}.pill{display:inline-flex;font-size:11px;background:var(--paper);padding:5px 12px;border:1px solid var(--line);border-radius:30px}.eyebrow{font-size:10px;letter-spacing:.16em;font-weight:650;color:#7b668f}.page-heading{margin:0 0 28px}.page-heading>.eyebrow{margin-bottom:10px}.page-heading .muted{margin-top:10px;max-width:760px}main{padding:37px 45px 30px;max-width:1420px;margin:auto}.home-grid{display:grid;grid-template-columns:minmax(0,1.6fr) minmax(245px,1fr);gap:25px}.today-card{padding:30px 33px;border:1px solid #dfd3eb;background:linear-gradient(135deg,#faf7fe,#fff);border-radius:15px;box-shadow:var(--shadow)}.today-card h2{font-size:31px;margin-top:24px}.today-card>.muted{font-size:14px}.row{display:flex;align-items:center;justify-content:space-between;gap:12px}.panel{border:1px solid var(--line);border-radius:12px;padding:25px;background:var(--paper);margin-bottom:22px;box-shadow:var(--shadow);overflow-wrap:anywhere}.panel.soft{background:var(--soft)}.panel h2{font-size:19px}.panel p:last-child{margin-bottom:0}.panel+.panel{margin-top:0}.home-grid aside .panel{padding:24px}.home-grid aside .panel p{font-size:13px}.today-list{list-style:none;padding:0;margin:23px 0}.today-list li{display:flex;gap:16px;padding:17px 0;border-top:1px solid var(--line)}.today-list li p{margin:4px 0;font-size:14px}.today-list strong{font-size:15px}.step-number{display:grid;place-items:center;background:var(--tint);color:var(--accent);width:32px;height:32px;border-radius:50%;font-size:12px;flex-shrink:0}.quiet-actions{display:flex;align-items:center;gap:18px;margin-top:20px;font-size:12px}.quiet-actions button{font-size:12px;background:transparent;padding:6px 10px}.empty{border:1px dashed #d9cce7;border-radius:12px;padding:28px 23px;background:#faf8fd;margin:23px 0}.empty-icon{display:inline-grid;place-items:center;width:35px;height:35px;background:var(--tint);border-radius:10px;color:var(--accent);font-size:20px;margin-bottom:14px}.empty p{font-size:14px;max-width:550px}.empty h3{font-size:18px}.exam-row{display:flex;align-items:center;justify-content:space-between;gap:14px;padding:12px 0;border-bottom:1px solid var(--line);margin-bottom:12px}.exam-row small{display:block;margin-top:4px}.countdown{font-size:13px;color:var(--accent);white-space:nowrap}.subject-strip{display:grid;grid-template-columns:repeat(3,1fr);gap:15px;margin:26px 0}.subject-strip a{display:flex;gap:12px;align-items:center;border:1px solid var(--line);border-radius:12px;padding:20px;background:var(--paper);text-decoration:none;color:var(--ink)}.subject-strip small{display:block;font-size:11px;line-height:1.5;margin-top:4px}.subject-strip a>span:last-child{margin-left:auto;color:var(--muted)}.subject-mark{width:35px;height:39px;display:grid;place-items:center;border-radius:9px;background:var(--tint);color:var(--accent);font-family:Georgia,serif;font-size:19px;flex-shrink:0}.section-title{display:flex;align-items:center;justify-content:space-between;gap:15px;margin:26px 0 15px}.section-title h2{margin:0}label{display:flex;flex-direction:column;gap:7px;font-size:13px;font-weight:600;margin:0 0 16px}input,textarea,select{width:100%;border:1px solid #d6cddd;border-radius:8px;padding:10px 12px;color:var(--ink);background:var(--paper);font-weight:400;min-width:0}input,select{min-height:43px}textarea{min-height:105px;resize:vertical;line-height:1.65}.checkbox{flex-direction:row;align-items:flex-start;gap:10px;font-weight:400}.checkbox input{width:18px;height:18px;min-height:18px;flex-shrink:0;accent-color:var(--accent);margin-top:2px}input[type=file]{font-size:13px}.form-grid{display:grid;grid-template-columns:1fr 1fr;gap:0 22px}.form-grid>button{justify-self:start;align-self:end;margin-bottom:16px}.span-all{grid-column:1/-1}.actions{display:flex;align-items:center;gap:10px;flex-wrap:wrap;margin:16px 0}.two-col{display:grid;grid-template-columns:1fr 1fr;gap:22px}.tag{display:inline-block;padding:4px 9px;background:var(--tint);color:#604579;border-radius:6px;font-size:11px;margin:0 5px 8px 0}.sample{background:#f7eedb;color:#79541d}.success{color:#396947;font-size:13px}.warning{color:#825d26;font-size:13px}.panel summary{cursor:pointer;font-weight:600;min-height:32px;line-height:1.8}.panel[open]>summary{margin-bottom:20px}.panel summary small{display:block}.inline-form{display:flex;gap:12px;align-items:end;flex-wrap:wrap;margin-top:18px}.inline-form label{min-width:200px;margin-bottom:0}.session-top{display:flex;gap:12px;align-items:center;flex-wrap:wrap;font-size:12px;color:var(--muted)}progress{width:100%;height:7px;accent-color:var(--accent);margin:14px 0 24px}.task-paper{max-width:900px;padding:32px}.prompt{font-size:19px;line-height:1.8;white-space:pre-wrap;margin:0 0 25px}.source{font-size:12px;color:var(--muted);padding:12px 0;border-top:1px solid var(--line)}.source button{font-size:11px;padding:5px 10px;min-height:34px;margin-left:8px}.hint{padding:15px 18px;background:var(--soft);border-left:3px solid #b7a1ca;font-size:14px;white-space:pre-wrap}.review{margin-top:20px;padding:22px;background:var(--soft);border:1px solid var(--line);border-radius:9px}.task-footer{display:flex;flex-wrap:wrap;gap:10px;border-top:1px solid var(--line);margin-top:28px;padding-top:20px}.mastery-row{display:flex;align-items:center;gap:15px;justify-content:space-between;padding:17px 0;border-bottom:1px solid var(--line)}.mastery-row small{display:block}.mastery-row .tag{margin:0}.history-row{padding:16px 0;border-bottom:1px solid var(--line)}.history-row small{display:block}.history-row p{font-size:13px;margin:6px 0}.resume{background:var(--tint);padding:20px;border-radius:10px;margin:22px 0}footer{padding:0 45px 28px;font-size:11px;color:var(--muted);text-align:center}#notice{position:fixed;bottom:22px;right:25px;max-width:min(480px,calc(100vw - 35px));z-index:150;background:#4c3a62;color:white;border-radius:10px;box-shadow:0 5px 25px #302a3d25}#notice:not(:empty){padding:16px 22px}#notice.error{background:#873e4c}.loading,.startup-error{padding:60px}.original-dialog{width:min(1000px,94vw);max-height:92vh;border:1px solid var(--line);border-radius:14px;padding:22px;overflow:auto}.original-dialog::backdrop{background:#302a3d70}.original-dialog iframe{width:100%;height:68vh;border:1px solid var(--line)}.original-dialog img{display:block;max-width:100%;max-height:70vh;object-fit:contain;margin:auto}.original-dialog h2{font-size:18px;overflow-wrap:anywhere;margin:0}.original-dialog .row button{flex-shrink:0}
@media(min-width:1500px){main{padding-top:50px}.today-card{padding:38px}.home-grid{gap:30px}.today-card h2{font-size:36px}}
@media(max-width:1100px){.sidebar{width:205px;padding:26px 12px}.main-shell{margin-left:205px}main{padding:30px 27px}.topbar{padding:0 27px}.home-grid{grid-template-columns:minmax(0,1.35fr) minmax(210px,1fr);gap:18px}.today-card{padding:25px}.subject-strip{grid-template-columns:1fr}.subject-strip a{padding:15px}.subject-strip small{font-size:12px}.subject-strip .subject-mark{width:38px}}
@media(max-width:800px){.sidebar{position:static;width:auto;padding:17px 20px;display:block}.brand{padding:0;font-size:20px}.brand-sub{font-size:11px}.brand-icon{width:35px;height:39px;font-size:27px}.nav-caption,.sidebar-note{display:none}nav{flex-direction:row;overflow-x:auto;margin-top:18px;padding-bottom:6px;gap:5px}nav a{white-space:nowrap;min-height:42px;padding:8px 12px}nav a>span{display:none}.main-shell{margin-left:0}.topbar{height:58px;padding:0 22px}.topbar>span:first-child{font-size:9px;letter-spacing:.1em}main{padding:28px 22px}h1{font-size:29px}.home-grid{grid-template-columns:1fr}.home-grid aside{display:grid;grid-template-columns:1fr 1fr;gap:18px}.today-card{padding:25px}.subject-strip{grid-template-columns:1fr}.two-col{grid-template-columns:1fr;gap:0}.mastery-row{flex-wrap:wrap}.task-paper{padding:24px}.form-grid{gap:0 18px}footer{padding:0 22px 25px}}
@media(max-width:520px){.home-grid aside,.form-grid{grid-template-columns:1fr}.home-grid aside{gap:0}.span-all{grid-column:auto}.panel{padding:20px}.today-card{padding:22px}.today-card h2{font-size:29px}.today-card .row .eyebrow{font-size:9px;max-width:180px}.quiet-actions{align-items:flex-start;flex-direction:column;gap:9px}.large{width:100%}.section-title{align-items:flex-start;flex-direction:column}.topbar>span:first-child{max-width:145px}.prompt{font-size:18px}.task-paper{padding:22px 18px}.original-dialog{padding:14px}.original-dialog .row{align-items:flex-start}.actions button{max-width:100%}.inline-form{align-items:stretch}.inline-form label{min-width:100%}}
@media(prefers-reduced-motion:reduce){*{scroll-behavior:auto!important;animation:none!important;transition:none!important}}
.picker-input{position:absolute;width:1px;height:1px;opacity:0;overflow:hidden;pointer-events:none}.picker-status{margin:14px 0 0;font-size:13px;color:var(--accent);font-weight:600}.picker-status.complete{color:#396947}.picker-status.error{color:#923b49}
.import-zone{border-style:dashed;text-align:center;background:linear-gradient(135deg,#fbf9fe,#f5f0fb)}.import-zone.dragging{border-color:var(--accent);background:#eee6f8}.import-zone form{display:flex;justify-content:center;align-items:center;gap:10px;flex-wrap:wrap}.import-zone label.button{margin:0}.import-review{max-height:620px;overflow:auto}.import-row{display:flex;align-items:flex-start;gap:12px;padding:10px 0;border-bottom:1px solid var(--line);font-weight:400}.import-row input{width:18px;min-height:18px;margin-top:4px}.import-row small{display:block}.import-dot{width:18px;text-align:center}.import-row.duplicate{background:#fff9ed}.import-row.unavailable,.import-row.unsupported,.import-row.oversized,.import-row.failed{opacity:.75}.compact{padding:15px 20px}.select-material{display:inline-flex;flex-direction:row;align-items:center;gap:7px;margin:0 5px 0 0}.select-material input{width:16px;min-height:16px}.material-card summary{list-style:none}.material-card summary::-webkit-details-marker{display:none}