:root{--navy:#0f1f33;--green:#00804d;--green-2:#38eea0;--mint:#eaf5ee;--line:#d6e6dc;--muted:#5d6f80;--bg:#f7fbf8;--white:#fff;--danger:#b3261e}*{box-sizing:border-box}body,html{margin:0;padding:0}body{font-family:Segoe UI,system-ui,-apple-system,Roboto,sans-serif;background:var(--bg);color:var(--navy);line-height:1.5;-webkit-font-smoothing:antialiased}a{color:var(--green);text-decoration:none}a:hover{text-decoration:underline}.top{justify-content:space-between;gap:16px;padding:14px clamp(16px,4vw,40px);background:var(--white);border-bottom:1px solid var(--line);position:-webkit-sticky;position:sticky;top:0;z-index:5}.brand,.top{display:flex;align-items:center}.brand{gap:10px;font-weight:700;letter-spacing:.2px;color:var(--navy)}.brand:hover{text-decoration:none}.mark{width:34px;height:34px;border-radius:9px;background:var(--green);color:#fff;display:grid;place-items:center;font-weight:800;font-size:15px}.brand b{color:var(--green)}.who{display:flex;align-items:center;gap:14px;font-size:14px;color:var(--muted)}.wrap{max-width:1040px;margin:0 auto;padding:clamp(18px,4vw,40px) clamp(16px,4vw,40px) 80px}h1{font-size:clamp(26px,4vw,38px);line-height:1.15;margin:0 0 8px}h2{font-size:22px;margin:36px 0 4px}.lead{color:var(--muted);margin:0 0 22px;max-width:62ch}.bar{height:8px;background:var(--line);overflow:hidden;margin:14px 0 6px}.bar,.bar>i{border-radius:99px}.bar>i{display:block;height:100%;background:var(--green)}.small{font-size:13px;color:var(--muted)}.grid{grid-gap:12px;gap:12px;margin-top:12px}.card,.grid{display:grid}.card{grid-template-columns:56px 1fr auto;grid-gap:14px;gap:14px;align-items:center;background:var(--white);border:1px solid var(--line);border-radius:16px;padding:14px 16px;color:inherit}a.card:hover{text-decoration:none;border-color:var(--green);box-shadow:0 6px 22px rgba(15,31,51,.07)}.card.off{opacity:.55}.num{width:56px;height:56px;border-radius:14px;background:var(--mint);color:var(--green);display:grid;place-items:center;font-weight:800;font-size:17px}.num.done{background:var(--green);color:#fff}.card h3{margin:0 0 2px;font-size:17px}.card p{margin:0;font-size:14px}.card p,.meta{color:var(--muted)}.meta{font-size:13px;white-space:nowrap}.btn,button.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:11px 18px;border-radius:12px;border:0;background:var(--green);color:#fff;font:inherit;font-weight:600;cursor:pointer}.btn:hover{filter:brightness(1.06);text-decoration:none}.btn.ghost{background:transparent;color:var(--navy);border:1px solid var(--line)}.btn.danger{background:transparent;color:var(--danger);border:1px solid #e8c9c6;padding:6px 12px;font-size:13px}.btn[disabled]{opacity:.6;cursor:default}.panel{background:var(--white);border:1px solid var(--line);border-radius:18px;padding:24px;max-width:440px;margin:8vh auto 0}.panel h1{font-size:26px}label{display:block;font-size:14px;font-weight:600;margin:14px 0 6px}input,select{width:100%;padding:12px 14px;border-radius:12px;border:1px solid #c7d8cd;font:inherit;background:#fff;color:var(--navy)}input:focus,select:focus{outline:2px solid var(--green-2);border-color:var(--green)}.msg{margin:14px 0 0;padding:10px 12px;border-radius:10px;background:var(--mint);font-size:14px}.msg.err{background:#fbe9e7;color:var(--danger)}.row{display:flex;gap:10px;flex-wrap:wrap;align-items:center}.stage{position:relative;background:#000;border-radius:16px;overflow:hidden;aspect-ratio:16/9;-moz-user-select:none;user-select:none;-webkit-user-select:none}.stage iframe,.stage video{position:absolute;inset:0;width:100%;height:100%;border:0;background:#000}.stage .wm{position:absolute;z-index:3;pointer-events:none;color:rgba(255,255,255,.42);font-size:13px;font-weight:600;text-shadow:0 0 3px rgba(0,0,0,.8);transition:top 1.2s ease,left 1.2s ease;white-space:nowrap}.stage .state{position:absolute;inset:0;display:grid;place-items:center;color:#cfe3d6;font-size:15px}.lessonhead{display:flex;justify-content:space-between;align-items:flex-start;gap:16px;flex-wrap:wrap;margin:20px 0 6px}.crumb{font-size:14px;margin-bottom:14px;display:inline-block}.pager{display:flex;justify-content:space-between;gap:10px;margin-top:22px}table{width:100%;border-collapse:collapse;background:var(--white);border:1px solid var(--line);border-radius:14px;overflow:hidden;font-size:14px}td,th{text-align:left;padding:10px 12px;border-bottom:1px solid var(--line);vertical-align:top}th{font-size:13px}.tag,th{background:var(--mint)}.tag{display:inline-block;padding:2px 9px;border-radius:99px;color:var(--green);font-size:12px;font-weight:700;margin-right:4px}.tag.warn{background:#fff1d6;color:#8a5a00}@media (max-width:560px){.card{grid-template-columns:44px 1fr}.card .meta{grid-column:2}.num{width:44px;height:44px;font-size:15px}}.check{display:flex;gap:10px;align-items:flex-start;font-weight:400;font-size:13.5px;line-height:1.45;margin:10px 0 0;cursor:pointer}.check input{width:18px;height:18px;margin:2px 0 0;flex:none;accent-color:var(--green)}