:root{--bg: #f6f7f9;--surface: #ffffff;--text: #1c2129;--muted: #667085;--border: #e3e6eb;--accent: #2f6fde;--accent-text: #ffffff;--accent-soft: #e8f0fd;--ok: #1f8a4c;--ok-soft: #e4f4ea;--warn: #a15c00;--warn-soft: #fbefdc;--danger: #c4372e;--danger-soft: #fbe7e5;--radius: 10px;color-scheme:light}@media(prefers-color-scheme:dark){:root{--bg: #12151a;--surface: #1b1f26;--text: #e6e9ee;--muted: #98a1b0;--border: #2c323c;--accent: #5b8ff0;--accent-text: #0d1117;--accent-soft: #1d2a42;--ok: #52c483;--ok-soft: #173326;--warn: #e0a24a;--warn-soft: #3a2c16;--danger: #ef6b62;--danger-soft: #3d1d1b;color-scheme:dark}}*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--text);font:15px/1.5 system-ui,-apple-system,Segoe UI,Roboto,sans-serif}a{color:var(--accent);text-decoration:none}a:hover{text-decoration:underline}h1{font-size:1.6rem;margin:.3rem 0 .4rem}h2{font-size:1.1rem;margin:1.5rem 0 .6rem}.topbar{background:var(--surface);border-bottom:1px solid var(--border)}.topbar-inner,.page{max-width:1040px;margin:0 auto;padding:0 16px}.topbar-inner{display:flex;align-items:center;gap:16px;height:56px}.brand{font-weight:700;color:var(--text)}.nav{display:flex;gap:14px}.nav a.router-link-exact-active{color:var(--text);font-weight:600}.who{color:var(--muted);font-size:.9rem;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.page{padding-top:24px;padding-bottom:48px}.spacer{flex:1}.muted{color:var(--muted)}.small{font-size:.85rem}.center{text-align:center}.nowrap{white-space:nowrap}.tabular{font-variant-numeric:tabular-nums}.error{color:var(--danger);background:var(--danger-soft);padding:8px 12px;border-radius:var(--radius)}.notice{background:var(--accent-soft);padding:8px 12px;border-radius:var(--radius)}.card{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:20px;margin-bottom:20px}.card h2{margin-top:0}.btn{display:inline-flex;align-items:center;justify-content:center;gap:6px;min-height:38px;padding:0 14px;border:1px solid var(--border);border-radius:8px;background:var(--surface);color:var(--text);font:inherit;cursor:pointer;text-decoration:none}.btn:hover{border-color:var(--muted);text-decoration:none}.btn:disabled{opacity:.55;cursor:default}.btn-primary{background:var(--accent);border-color:var(--accent);color:var(--accent-text)}.btn-done{background:var(--ok-soft);border-color:var(--ok);color:var(--ok)}.btn-danger{color:var(--danger)}.btn-ghost{border-color:transparent;background:transparent}.btn-sm{min-height:30px;padding:0 10px;font-size:.85rem}.field{display:flex;flex-direction:column;gap:4px}.field span{font-size:.85rem;color:var(--muted)}input{font:inherit;color:var(--text);background:var(--bg);border:1px solid var(--border);border-radius:8px;padding:8px 10px;min-height:40px}input:focus{outline:2px solid var(--accent);outline-offset:-1px}.auth{max-width:380px;margin:8vh auto 0;display:flex;flex-direction:column;gap:14px}.auth h1,.auth p{margin:0}.code-input{font-size:1.3rem;letter-spacing:.12em;text-transform:uppercase;text-align:center;font-family:ui-monospace,monospace}.summary{margin-bottom:20px}.progress-line{display:flex;align-items:center;gap:12px;color:var(--muted)}.bar{flex:1;max-width:360px;height:8px;background:var(--border);border-radius:99px;overflow:hidden}.bar-sm{display:inline-block;width:80px;height:6px;vertical-align:middle;margin-right:8px}.bar-fill{height:100%;background:var(--ok);border-radius:99px}.group h2{color:var(--muted);font-weight:600}.lesson-list{list-style:none;margin:0;padding:0;background:var(--surface);border:1px solid var(--border);border-radius:var(--radius)}.lesson-list li+li{border-top:1px solid var(--border)}.lesson-row{display:flex;align-items:center;gap:12px;padding:12px 16px;color:var(--text)}.lesson-row:hover{background:var(--accent-soft);text-decoration:none}.lesson-title{flex:1;min-width:0;overflow-wrap:anywhere}.lesson-row.done .lesson-title{color:var(--muted)}.check{flex:none;width:22px;height:22px;border-radius:50%;border:2px solid var(--border);display:grid;place-items:center;font-size:13px;font-weight:700;color:var(--accent-text)}.lesson-row.done .check{background:var(--ok);border-color:var(--ok)}.badge{font-size:.75rem;padding:1px 8px;border-radius:99px;background:var(--warn-soft);color:var(--warn)}.lesson h1{overflow-wrap:anywhere}.player{width:100%;max-height:75vh;background:#000;border-radius:var(--radius);display:block;margin:12px 0}.lesson-actions{display:flex;flex-wrap:wrap;gap:10px;align-items:center}.head-row{display:flex;align-items:center;gap:12px;flex-wrap:wrap;margin-bottom:16px}.head-row h1{margin:0}.form-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:14px;align-items:end}.form-grid h2{grid-column:1 / -1;margin:0}.form-actions{display:flex;align-items:center;gap:10px}.table-wrap{overflow-x:auto;background:var(--surface);border:1px solid var(--border);border-radius:var(--radius)}.table{width:100%;border-collapse:collapse}.table th,.table td{padding:10px 12px;text-align:left;vertical-align:top;border-bottom:1px solid var(--border)}.table tr:last-child td{border-bottom:none}.table th{font-size:.8rem;font-weight:600;color:var(--muted)}.actions{display:flex;flex-wrap:wrap;gap:6px;justify-content:flex-end;min-width:220px}.status{font-size:.8rem;padding:2px 8px;border-radius:99px;white-space:nowrap}.status.active{background:var(--ok-soft);color:var(--ok)}.status.inactive{background:var(--border);color:var(--muted)}.status.expired{background:var(--warn-soft);color:var(--warn)}.codebox{display:flex;flex-wrap:wrap;gap:16px;align-items:center;justify-content:space-between;border-color:var(--accent);background:var(--accent-soft)}.code{font-family:ui-monospace,monospace;font-size:1.8rem;letter-spacing:.1em;font-weight:700;margin:4px 0;-webkit-user-select:all;user-select:all}.codebox-actions{display:flex;gap:8px}@media(max-width:600px){h1{font-size:1.35rem}.who{display:none}.code{font-size:1.4rem}}