:root{color-scheme:dark;--bg: #0f172a;--panel: #1e293b;--panel2: #334155;--border: #334155;--text: #e2e8f0;--muted: #94a3b8;--accent: #60a5fa;--accent-strong: #3b82f6;--danger: #f87171;--ok: #34d399;font-family:system-ui,-apple-system,Segoe UI,Roboto,Hiragino Sans,Noto Sans JP,Yu Gothic,Microsoft YaHei,sans-serif}*{box-sizing:border-box}html,body{margin:0;padding:0;background:var(--bg);color:var(--text);min-height:100vh;-webkit-font-smoothing:antialiased}#root{min-height:100vh;display:flex;flex-direction:column}header.topbar{position:sticky;top:0;z-index:10;background:#0f172aeb;backdrop-filter:blur(8px);border-bottom:1px solid var(--border);padding:10px 14px}.topbar h1{margin:0 0 8px;font-size:1rem;letter-spacing:.5px;color:#cbd5e1;display:flex;align-items:center;gap:8px}.topbar h1 .sub{font-size:.75rem;color:var(--muted);font-weight:400}.search{width:100%;padding:10px 12px;border-radius:10px;border:1px solid var(--border);background:var(--panel);color:var(--text);font-size:.95rem}.search:focus{outline:2px solid var(--accent);border-color:var(--accent)}nav.tabs{display:flex;gap:6px;overflow-x:auto;padding:8px 12px;border-bottom:1px solid var(--border);background:var(--bg);position:sticky;top:0;z-index:5;scrollbar-width:none}nav.tabs::-webkit-scrollbar{display:none}nav.tabs button{flex:0 0 auto;padding:8px 14px;border-radius:999px;border:1px solid var(--border);background:var(--panel);color:var(--text);font-size:.9rem;cursor:pointer;white-space:nowrap}nav.tabs button.active{background:var(--accent-strong);border-color:var(--accent-strong);color:#fff}main{flex:1;padding:12px 14px 80px;max-width:900px;margin:0 auto;width:100%}.filter-row{display:flex;gap:6px;flex-wrap:wrap;margin-bottom:12px}.filter-row button{padding:6px 12px;border-radius:8px;border:1px solid var(--border);background:var(--panel);color:var(--muted);font-size:.85rem;cursor:pointer}.filter-row button.active{background:var(--panel2);color:var(--text);border-color:var(--accent)}.card{background:var(--panel);border:1px solid var(--border);border-radius:12px;padding:14px;margin-bottom:12px}.card-head{display:flex;justify-content:space-between;align-items:flex-start;gap:10px;margin-bottom:6px}.term-jp{font-size:1.2rem;font-weight:600;letter-spacing:.3px;color:#f8fafc}.term-cat{font-size:.7rem;color:var(--muted);padding:2px 8px;border:1px solid var(--border);border-radius:999px}.term-zh{color:#cbd5e1;line-height:1.55;white-space:pre-wrap;margin-top:6px}.term-notes{margin-top:10px;padding:8px 10px;background:#33415566;border-left:3px solid var(--accent);font-size:.85rem;color:var(--muted);white-space:pre-wrap;border-radius:4px;line-height:1.5}.play-btn{flex:0 0 auto;width:38px;height:38px;border-radius:50%;border:1px solid var(--border);background:var(--panel2);color:var(--text);font-size:1rem;cursor:pointer;display:flex;align-items:center;justify-content:center;transition:all .15s}.play-btn:hover,.play-btn.playing{background:var(--accent-strong);border-color:var(--accent-strong);color:#fff}.qa-q{font-weight:600;font-size:1.05rem;color:#f8fafc;line-height:1.5}.qa-q-zh{color:var(--muted);font-size:.85rem;margin-top:4px;line-height:1.5}.qa-a{margin-top:12px;padding:12px;background:#0f172a80;border-radius:8px;white-space:pre-wrap;line-height:1.75;font-size:.95rem;color:#e2e8f0}.qa-note{margin-top:8px;color:var(--muted);font-size:.8rem;white-space:pre-wrap;line-height:1.5}.flash-toggle{margin-left:auto;font-size:.8rem;color:var(--muted);display:flex;align-items:center;gap:6px}.diagram-img{width:100%;border-radius:12px;border:1px solid var(--border);background:#fff;padding:8px;margin-bottom:14px;cursor:zoom-in}.image-caption{font-size:.9rem;color:var(--muted);margin:6px 0 16px}.tip{background:var(--panel);border:1px solid var(--border);border-left:4px solid var(--accent);border-radius:10px;padding:12px 14px;margin-bottom:10px;white-space:pre-wrap;line-height:1.7;font-size:.95rem}.empty{color:var(--muted);text-align:center;padding:40px 12px}.flashcard .hidden-zh .term-zh,.flashcard .hidden-zh .term-notes{filter:blur(5px);cursor:pointer;user-select:none;transition:filter .15s}.flashcard .hidden-zh .term-zh.revealed,.flashcard .hidden-zh .term-notes.revealed{filter:none}.lightbox{position:fixed;inset:0;background:#000000e6;display:flex;align-items:center;justify-content:center;z-index:100;padding:20px;cursor:zoom-out}.lightbox img{max-width:100%;max-height:100%;background:#fff;border-radius:8px}@media(max-width:640px){main{padding:10px 10px 80px}.term-jp{font-size:1.1rem}.qa-a{font-size:.92rem}}