*{margin:0;padding:0;box-sizing:border-box}:root{--blue: #0F62FE;--dark: #161616;--gray: #525252;--light: #F4F4F4;--border: #E0E0E0;--green: #24A148}body{font-family:IBM Plex Sans,-apple-system,sans-serif;background:var(--light);color:var(--dark)}.app{min-height:100vh}.topbar{display:flex;align-items:center;justify-content:space-between;height:60px;padding:0 24px;background:#fff;border-bottom:1px solid var(--border);position:sticky;top:0;z-index:10}.brand{display:flex;align-items:center;gap:10px;font-weight:700;font-size:17px}.mark{background:var(--blue);color:#fff;width:28px;height:28px;display:flex;align-items:center;justify-content:center;border-radius:6px;font-size:13px}nav{display:flex;gap:8px}nav button{padding:8px 18px;border:1px solid var(--border);background:#fff;border-radius:6px;font-size:14px;font-weight:600;cursor:pointer;color:var(--gray)}nav button.active{background:var(--blue);color:#fff;border-color:var(--blue)}.deck-pane{padding:40px 24px;max-width:1100px;margin:0 auto}.deck-pane h1{margin-bottom:24px;font-size:28px}.deck-list{display:grid;grid-template-columns:repeat(auto-fill,minmax(320px,1fr));gap:20px}.deck-card{background:#fff;border:1px solid var(--border);border-top:3px solid var(--blue);padding:28px;border-radius:8px;cursor:pointer;transition:box-shadow .2s}.deck-card:hover{box-shadow:0 8px 24px #00000014}.deck-title{font-size:18px;font-weight:700;margin-bottom:8px}.deck-desc{font-size:14px;color:var(--gray);margin-bottom:20px}.deck-play{display:inline-block;background:var(--blue);color:#fff;padding:8px 20px;border-radius:6px;font-weight:600;font-size:14px}.player{display:flex;flex-direction:column;height:calc(100vh - 60px)}.player-bar{display:flex;align-items:center;gap:16px;padding:12px 24px;background:#fff;border-bottom:1px solid var(--border)}.player-bar .back{background:none;border:1px solid var(--border);border-radius:6px;padding:6px 14px;cursor:pointer;font-size:14px}.player-title{font-weight:600}.player-frame{flex:1;width:100%;border:none}.notes-pane{display:grid;grid-template-columns:1.2fr .8fr;gap:24px;padding:40px 24px;max-width:1200px;margin:0 auto}.notes-form{background:#fff;border:1px solid var(--border);border-top:3px solid var(--blue);padding:32px;border-radius:8px}.notes-form h1{margin-bottom:20px;font-size:24px}.notes-form label{display:block;font-size:13px;font-weight:600;margin:16px 0 6px}.notes-form input,.notes-form textarea{width:100%;padding:10px 14px;border:1px solid var(--border);border-radius:6px;font-family:inherit;font-size:14px}.notes-form input:focus,.notes-form textarea:focus{outline:2px solid var(--blue);outline-offset:1px}.row2{display:grid;grid-template-columns:1fr 1fr;gap:16px}.actions{margin-top:20px}button.primary{background:var(--blue);color:#fff;border:none;padding:12px 28px;border-radius:6px;font-size:15px;font-weight:600;cursor:pointer}button.primary:disabled{opacity:.6}.saved-ok{margin-top:16px;padding:12px 16px;background:#e8f5e9;border:1px solid var(--green);border-radius:6px;font-size:14px}.saved-err{margin-top:16px;padding:12px 16px;background:#ffebee;border:1px solid #D32F2F;border-radius:6px;font-size:14px}.saved-ok code{display:block;font-size:12px;margin-top:6px;color:var(--gray)}.muted{color:var(--gray);font-size:13px;margin-top:16px}.notes-history{background:#fff;border:1px solid var(--border);border-radius:8px;padding:24px;max-height:80vh;overflow-y:auto}.notes-history h2{font-size:18px;margin-bottom:16px}.note-item{border-bottom:1px solid var(--border);padding:12px 0}.note-head{display:flex;justify-content:space-between;font-size:14px}.note-title{color:var(--gray);font-size:13px;margin-top:4px}.note-actions{display:flex;gap:8px;margin-top:8px}.note-actions button{border:1px solid var(--border);background:#fff;border-radius:4px;padding:4px 10px;font-size:12px;cursor:pointer;color:var(--gray)}.note-actions button:hover{border-color:var(--blue);color:var(--blue)}.note-actions button.del:hover{border-color:#d32f2f;color:#d32f2f}button.cancel{border:1px solid var(--border);background:#fff;padding:12px 24px;border-radius:6px;font-size:14px;font-weight:600;cursor:pointer;color:var(--gray)}button.cancel:hover{border-color:#d32f2f;color:#d32f2f}@media(max-width:900px){.notes-pane{grid-template-columns:1fr}}