:root{--lz-green:#174b2b;--lz-yellow:#ffd21f;--lz-ink:#172235;--lz-muted:#66758a;--lz-line:#e1e7ef}.lzc-card{background:#fff;border:1px solid var(--lz-line);border-radius:18px;padding:22px;margin:14px 0;color:var(--lz-ink);box-shadow:0 10px 32px rgba(17,40,25,.06)}.lzc-card h2{margin-top:0}.lzc-card label{display:block;font-weight:700;font-size:13px;margin:10px 0}.lzc-fields{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:8px 14px}.lzc-input{display:block;box-sizing:border-box;width:100%;padding:11px;border:1px solid #d5deea;border-radius:9px;margin-top:6px;background:#fff;color:#172235}.lzc-btn{display:inline-block;border:0;border-radius:10px;padding:11px 15px;background:var(--lz-green);color:#fff;font-weight:750;cursor:pointer;margin:6px 5px 4px 0}.lzc-btn-light{background:#eef4ef;color:var(--lz-green);border:1px solid #d7e4da}.lzc-btn-red{background:#c83c4a}.lzc-muted{font-size:12px;color:var(--lz-muted);line-height:1.5;margin-top:12px}.lzc-success{background:#eaf8ef;color:#155c32;border:1px solid #b9e4c8;border-radius:12px;padding:14px;margin:12px 0}.lzc-error{background:#fff0f0;color:#9f2631;border-radius:12px;padding:14px}.lzc-class-row{padding:14px 0;border-top:1px solid var(--lz-line)}.lzc-class-row span{font-size:13px;color:var(--lz-muted)}.lzc-room{background:#101827;color:#fff;padding:16px;border-radius:18px}.lzc-room-head{display:flex;justify-content:space-between;align-items:start;gap:12px;margin-bottom:15px}.lzc-room-head h2{color:#fff;margin:5px 0}.lzc-room-head p{color:#b8c3d4;margin:0;font-size:13px}.lzc-kicker{color:var(--lz-yellow);font-size:11px;font-weight:800;letter-spacing:1.5px}.lzc-live{background:#244735;color:#8bf0b6;border-radius:8px;padding:8px;font-size:11px}.lzc-room-layout{display:grid;grid-template-columns:minmax(0,1fr) 260px;gap:12px}.lzc-board-area{background:#fff;color:#172235;border-radius:13px;overflow:hidden;display:flex;flex-direction:column}.lzc-tools{display:flex;align-items:center;gap:6px;flex-wrap:wrap;padding:10px;border-bottom:1px solid var(--lz-line)}.lzc-tool{border:1px solid var(--lz-line);background:#fff;color:#172235;padding:8px 10px;border-radius:8px;cursor:pointer}.lzc-tool.active{background:#eaf8ef;border-color:#9ac9a8}.lzc-tools input[type=color]{width:32px;height:32px;border:1px solid var(--lz-line);background:#fff}.lzc-tools select{padding:7px;border:1px solid var(--lz-line);border-radius:8px}.lzc-board-area canvas{width:100%;height:520px;display:block;touch-action:none;background-color:#fff;background-image:radial-gradient(#e2e8ef 1px,transparent 1px);background-size:20px 20px;cursor:crosshair}.lzc-board-area .lzc-muted{padding:8px 12px;border-top:1px solid var(--lz-line);margin:0}.lzc-side{background:#182338;border:1px solid #2b3850;border-radius:13px;padding:12px;display:flex;flex-direction:column;gap:8px}.lzc-video{height:155px;background:#0b1220;border-radius:10px;position:relative;display:grid;place-items:center;color:#aab7cb;font-size:12px;overflow:hidden}.lzc-video video{position:absolute;width:100%;height:100%;object-fit:cover}.lzc-video span{z-index:1}.lzc-audio-status{font-size:12px;color:#b8c3d4;padding:5px 0}.lzc-side .lzc-btn{width:100%;margin:0}.lzc-note{border:1px solid #34435d;padding:12px;border-radius:10px;font-size:12px;margin-top:8px}.lzc-note p{color:#b8c3d4;line-height:1.5}.lzc-side .lzc-btn-light{background:#eef4ef;color:var(--lz-green)}@media(max-width:800px){.lzc-room-layout{grid-template-columns:1fr}.lzc-board-area canvas{height:400px}.lzc-side{display:grid;grid-template-columns:1fr 1fr}.lzc-video,.lzc-note{grid-column:1/-1}.lzc-room-head{flex-direction:column}}@media(max-width:520px){.lzc-fields{grid-template-columns:1fr}.lzc-card{padding:15px}.lzc-room{padding:9px}.lzc-side{display:flex}.lzc-board-area canvas{height:340px}}