:root{--bg: #0f1115;--surface: #181b22;--border: #272b35;--text: #e8eaed;--muted: #9aa0aa;--accent: #6366f1;--danger: #ef4444;color-scheme:dark}*{margin:0;padding:0;box-sizing:border-box}body{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,sans-serif;background:var(--bg);color:var(--text)}.centered{min-height:100vh;display:flex;align-items:center;justify-content:center}.auth-page{min-height:100vh;display:flex;align-items:center;justify-content:center;padding:24px}.card{background:var(--surface);border:1px solid var(--border);border-radius:12px;padding:32px;width:100%;max-width:380px;display:flex;flex-direction:column;gap:14px}h1{font-size:22px}h2{font-size:17px;margin-bottom:12px}input,select{background:var(--bg);border:1px solid var(--border);border-radius:8px;padding:11px 12px;color:var(--text);font-size:14px;font-family:inherit}input:focus,select:focus{outline:none;border-color:var(--accent)}button,.button{background:var(--accent);color:#fff;border:none;border-radius:8px;padding:11px 16px;font-size:14px;font-weight:600;font-family:inherit;cursor:pointer;text-decoration:none;display:inline-block;text-align:center}button:disabled{opacity:.6;cursor:default}button.ghost,.ghost{background:transparent;border:1px solid var(--border);color:var(--muted);text-decoration:none;padding:8px 14px;border-radius:8px;font-size:13px;cursor:pointer}.muted{color:var(--muted);font-size:13px}.muted a{color:var(--accent)}.error{background:#ef44441f;border:1px solid rgba(239,68,68,.4);color:#fca5a5;padding:10px 12px;border-radius:8px;font-size:13px}.notice{background:#6366f11f;border:1px solid rgba(99,102,241,.4);padding:12px;border-radius:8px;font-size:13px;margin:12px 0;display:flex;flex-wrap:wrap;align-items:center;gap:8px}.notice code{background:var(--bg);padding:3px 7px;border-radius:4px;font-size:13px}.page{max-width:900px;margin:0 auto;padding:24px}.page section{margin-top:32px}.topbar{display:flex;justify-content:space-between;align-items:center;padding-bottom:16px;border-bottom:1px solid var(--border)}.inline-form{display:flex;gap:8px;flex-wrap:wrap;margin-bottom:16px}.inline-form input{flex:1;min-width:140px}.list{display:flex;flex-direction:column;gap:8px}.row{background:var(--surface);border:1px solid var(--border);border-radius:10px;padding:14px 16px;display:flex;justify-content:space-between;align-items:center;gap:12px;flex-wrap:wrap}.row-actions{display:flex;gap:8px;align-items:center}.lesson-page{height:100vh;display:flex;flex-direction:column}.lesson-page .topbar{padding:14px 20px}.banner{background:#6366f126;border-bottom:1px solid rgba(99,102,241,.35);padding:10px 20px;font-size:13px;color:#c7d2fe}.banner.warning{background:#eab3081f;border-bottom-color:#eab30859;color:#fde68a}.stage{flex:1;display:flex;gap:12px;padding:12px;overflow:hidden}.screen-area{flex:1;position:relative;background:#000;border-radius:10px;overflow:hidden}.screen-area video{width:100%;height:100%;object-fit:contain}.drawing-layer{position:absolute;top:0;right:0;bottom:0;left:0;width:100%;height:100%;cursor:crosshair}.tiles{display:grid;grid-template-columns:repeat(auto-fill,minmax(220px,1fr));gap:12px;align-content:start;flex:1;overflow-y:auto}.stage.with-screen .tiles{flex:0 0 260px;grid-template-columns:1fr}.video-tile{position:relative;aspect-ratio:16 / 9;background:#1f2229;border-radius:10px;overflow:hidden}.video-tile.local{border:2px solid var(--accent)}.video-tile video{width:100%;height:100%;object-fit:cover}.blur-layer{position:absolute;top:0;right:0;bottom:0;left:0;width:100%;height:100%;object-fit:cover}.blur-layer.hidden{display:none}.tile-label{position:absolute;bottom:8px;left:8px;background:#000000a6;padding:3px 8px;border-radius:5px;font-size:12px}.controls{display:flex;justify-content:center;align-items:center;gap:12px;padding:16px;border-top:1px solid var(--border);flex-wrap:wrap}.round{min-width:62px;height:42px;border-radius:21px;background:#2a2e38;font-size:13px}.round.on{background:var(--accent)}.round.off{background:var(--danger)}.blur-control{display:flex;align-items:center;gap:10px}.pill{background:#2a2e38;border-radius:21px;height:42px;font-size:13px}.pill.on{background:var(--accent)}input[type=range]{width:110px;padding:0}.row.column{flex-direction:column;align-items:stretch}.row-main{display:flex;justify-content:space-between;align-items:center;gap:12px}.paid-badge{display:inline-block;margin-top:6px;font-size:12px;padding:2px 8px;border-radius:5px;background:#ef444426;color:#fca5a5}.paid-badge.active{background:#22c55e26;color:#86efac}.billing-editor{display:flex;flex-direction:column;gap:12px;margin-top:14px;padding-top:14px;border-top:1px solid var(--border)}.billing-editor label{display:flex;flex-direction:column;gap:6px;font-size:13px;color:var(--muted)}.price-row{display:flex;gap:8px}.price-row input{flex:1}.editor-actions{display:flex;gap:8px;align-items:center}.details-form{display:flex;flex-direction:column;gap:10px}textarea{background:var(--bg);border:1px solid var(--border);border-radius:8px;padding:11px 12px;color:var(--text);font-size:14px;font-family:inherit;resize:vertical}textarea:focus{outline:none;border-color:var(--accent)}.payment-details pre{font-family:inherit;white-space:pre-wrap;margin:6px 0;font-size:14px}