:root{--bg: #f6f7f9;--panel: #ffffff;--text: #1d2430;--muted: #66707f;--line: #e3e7ee;--accent: #4550e5;--accent-soft: #eceeff;--ok: #1a9e5c;--warn: #c77800;--danger: #c43d3d;--radius: 10px}@media(prefers-color-scheme:dark){:root{--bg: #14171c;--panel: #1d2129;--text: #e8ebf0;--muted: #98a2b0;--line: #2c323d;--accent: #7c86ff;--accent-soft: #262b45}}*{box-sizing:border-box}body{margin:0;font:15px/1.5 system-ui,-apple-system,Segoe UI,sans-serif;background:var(--bg);color:var(--text)}a{color:var(--accent);text-decoration:none}h1{font-size:1.4rem;margin:0 0 4px}h2{font-size:1.05rem;margin:18px 0 8px}p.sub{color:var(--muted);margin:0 0 16px}.layout{display:flex;min-height:100vh}nav.side{width:210px;flex-shrink:0;padding:18px 12px;border-right:1px solid var(--line);background:var(--panel);position:sticky;top:0;height:100vh}nav.side .brand{font-weight:700;font-size:1.1rem;padding:4px 10px 16px}nav.side a{display:block;padding:8px 10px;border-radius:8px;color:var(--text);margin-bottom:2px}nav.side a.active{background:var(--accent-soft);color:var(--accent);font-weight:600}nav.side a:hover{background:var(--accent-soft)}main.content{flex:1;padding:24px 28px;max-width:1100px}.card{background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);padding:16px;margin-bottom:14px}.grid{display:grid;gap:14px}.grid.cols-2{grid-template-columns:repeat(auto-fill,minmax(320px,1fr))}.grid.cols-3{grid-template-columns:repeat(auto-fill,minmax(240px,1fr))}table{width:100%;border-collapse:collapse}th,td{text-align:left;padding:7px 10px;border-bottom:1px solid var(--line);vertical-align:top}th{color:var(--muted);font-size:.8rem;text-transform:uppercase;letter-spacing:.04em}tr.click{cursor:pointer}tr.click:hover td{background:var(--accent-soft)}button,.btn{font:inherit;border:1px solid var(--line);background:var(--panel);color:var(--text);padding:7px 14px;border-radius:8px;cursor:pointer}button.primary,.btn.primary{background:var(--accent);border-color:var(--accent);color:#fff;font-weight:600}button.danger{color:var(--danger)}button:hover{filter:brightness(.96)}input,select,textarea{font:inherit;color:var(--text);background:var(--bg);border:1px solid var(--line);border-radius:8px;padding:7px 10px;width:100%}textarea{min-height:70px;resize:vertical}label{display:block;font-size:.8rem;color:var(--muted);margin:10px 0 3px}.row{display:flex;gap:10px;flex-wrap:wrap;align-items:center}.row>*{flex:1;min-width:120px}.row.tight>*{flex:0 0 auto;min-width:0}.tag{display:inline-block;padding:1px 9px;border-radius:999px;font-size:.78rem;background:var(--accent-soft);color:var(--accent);margin-right:4px}.tag.ok{background:color-mix(in srgb,var(--ok) 14%,transparent);color:var(--ok)}.tag.warn{background:color-mix(in srgb,var(--warn) 14%,transparent);color:var(--warn)}.progress{height:7px;background:var(--line);border-radius:999px;overflow:hidden}.progress>div{height:100%;background:var(--accent);border-radius:999px}.muted{color:var(--muted)}.spread{display:flex;justify-content:space-between;align-items:center;gap:10px}.md{line-height:1.6}.md table{margin:10px 0}.md code{background:var(--accent-soft);padding:1px 5px;border-radius:5px;font-size:.9em}.md blockquote{border-left:3px solid var(--accent);margin:8px 0;padding:2px 12px;color:var(--muted)}.pdf-box{border:1px solid var(--line);border-radius:var(--radius);background:var(--panel);overflow:auto;max-height:calc(100vh - 170px);text-align:center}.pdf-box canvas{display:inline-block;max-width:none}.pdf-controls{margin-bottom:8px;position:sticky;top:0;z-index:5}.pdf-controls button{min-width:40px}.toast{position:fixed;bottom:18px;right:18px;background:var(--text);color:var(--bg);padding:10px 16px;border-radius:8px;z-index:50}.ssearch{position:relative;max-width:320px}.ssearch-drop{position:absolute;top:100%;left:0;right:0;z-index:30;background:var(--panel);border:1px solid var(--line);border-radius:8px;box-shadow:0 6px 18px #0000002e;overflow:hidden}.ssearch-drop button{display:block;width:100%;text-align:left;border:0;border-radius:0}.chips{display:flex;flex-wrap:wrap;gap:6px;margin:8px 0}.chips .chip{display:inline-flex;align-items:center;gap:6px;padding:4px 10px;background:var(--accent-soft);color:var(--accent);border-radius:999px;font-size:.85rem}.chips .chip button{border:0;background:none;color:inherit;padding:0 2px;min-height:0;cursor:pointer;font-weight:700}.login-screen{min-height:100vh;display:flex;align-items:center;justify-content:center;padding:20px}.login-card{width:100%;max-width:360px}.live-overlay{position:fixed;top:0;right:0;bottom:0;left:0;z-index:100;background:var(--bg);display:flex;flex-direction:column}.live-top{display:flex;justify-content:space-between;align-items:center;gap:8px;padding:10px 14px;background:var(--panel);border-bottom:2px solid var(--danger)}.live-stages{display:flex;gap:6px;padding:8px 14px;overflow-x:auto;background:var(--panel);border-bottom:1px solid var(--line)}.live-stages button{white-space:nowrap}.live-body{flex:1;overflow-y:auto;padding:14px}.live-nav{display:flex;justify-content:space-between;gap:8px;padding:10px 14px calc(10px + env(safe-area-inset-bottom));background:var(--panel);border-top:1px solid var(--line)}.live-nav button{flex:1;min-height:48px;font-size:1rem}.live-student{background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);padding:14px;margin:10px 0}table.falea td{border:0;padding:4px}table.falea button{width:100%;min-height:46px;font-weight:700}.live-pill{position:fixed;bottom:calc(70px + env(safe-area-inset-bottom));left:50%;transform:translate(-50%);z-index:100;background:var(--danger);color:#fff;padding:10px 18px;border-radius:999px;cursor:pointer;box-shadow:0 4px 14px #0000004d;white-space:nowrap;font-weight:600}@media(min-width:761px){.live-pill{bottom:18px}}@media(max-width:760px){body{font-size:16px}.layout{flex-direction:column}nav.side{order:2;width:100%;height:auto;position:fixed;bottom:0;left:0;z-index:20;display:flex;justify-content:space-around;padding:4px 2px calc(4px + env(safe-area-inset-bottom));border-right:0;border-top:1px solid var(--line)}nav.side .brand{display:none}nav.side a{white-space:nowrap;font-size:.72rem;text-align:center;padding:6px 8px;flex:1}main.content{padding:14px 12px calc(78px + env(safe-area-inset-bottom))}.card{overflow-x:auto}.card table{min-width:540px}button,.btn,input,select{min-height:42px}input[type=checkbox]{min-height:0;width:22px;height:22px}.pdf-box{max-height:calc(100vh - 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