@import url('https://fonts.googleapis.com/css2?family=ZCOOL+KuaiLe&display=swap');
:root{--bg:#1a1a2e;--card:#16213e;--accent:#e94560;--gold:#f5c518;--text:#eee;--dim:#999;--green:#4ecca3;}
*{margin:0;padding:0;box-sizing:border-box;}
body{font-family:'ZCOOL KuaiLe',sans-serif;background:var(--bg);color:var(--text);min-height:100vh;}
.header{text-align:center;padding:20px 16px 10px;background:linear-gradient(135deg,#0f3460,#533483);}
.header h1{font-size:1.6em;color:var(--gold);}
.header p{color:var(--dim);font-size:0.85em;margin-top:4px;}
.card-list{padding:12px;}
.card{background:var(--card);border-radius:12px;padding:14px 16px;margin-bottom:10px;display:flex;align-items:center;gap:12px;cursor:pointer;border:2px solid transparent;transition:.2s;}
.card:active{border-color:var(--accent);transform:scale(0.98);}
.card .num{width:36px;height:36px;border-radius:50%;background:var(--accent);display:flex;align-items:center;justify-content:center;font-size:1.1em;flex-shrink:0;}
.card .info{flex:1;min-width:0;}
.card .info h3{font-size:1em;margin-bottom:2px;}
.card .info p{font-size:0.75em;color:var(--dim);white-space:nowrap;overflow:hidden;text-overflow:ellipsis;}
.card .arrow{color:var(--dim);font-size:1.4em;}
.det-header{padding:14px 16px;background:linear-gradient(135deg,#0f3460,#533483);display:flex;align-items:center;gap:10px;}
.det-header h2{font-size:1.3em;color:var(--gold);}
.back-btn{background:none;border:1px solid var(--dim);color:var(--text);border-radius:6px;padding:4px 10px;font-size:0.85em;cursor:pointer;font-family:inherit;}
.det-box{background:var(--card);margin:8px 12px;padding:14px;border-radius:10px;}
.det-box h3{color:var(--gold);margin-bottom:8px;font-size:1em;}
.content{line-height:1.8;font-size:0.9em;}
.funny{color:#f0c27f;}
.points{color:#b8e6b8;}
.mnem{color:#c3aed6;font-style:italic;}
.mc{color:#87ceeb;}
.audio-bar{display:flex;gap:8px;}
.ab{flex:1;background:var(--accent);color:#fff;border:none;border-radius:8px;padding:10px;font-size:0.95em;cursor:pointer;font-family:inherit;}
.ab:active{transform:scale(0.95);}
.ab-stop{flex:0 0 50px;background:#555;}
.quiz-area{font-size:0.9em;}
.quiz-q{background:#1e2a4a;padding:12px;border-radius:8px;margin-bottom:8px;cursor:pointer;line-height:1.7;}
.quiz-q .quiz-reveal{color:var(--accent);font-size:0.8em;margin-top:6px;}
.quiz-q.revealed .quiz-reveal{display:none;}
.quiz-q b{color:var(--gold);}
.q-ans{display:none;margin-top:8px;padding-top:8px;border-top:1px solid #333;color:var(--green);}
.quiz-q.revealed .q-ans{display:block;}
.quiz-q.revealed .reveal-btn{display:none;}
.reveal-btn{background:var(--accent);color:#fff;border:none;border-radius:6px;padding:8px 16px;margin-top:8px;font-size:0.85em;cursor:pointer;font-family:inherit;}
.reveal-btn:active{transform:scale(0.95);}
.mindmap-img{width:100%;border-radius:8px;margin-bottom:12px;}
.mm{padding:8px 0;}
.mm-center{background:var(--accent);color:#fff;text-align:center;padding:12px;border-radius:10px;font-size:1.3em;margin-bottom:12px;}
.mm-branch{margin-bottom:10px;}
.mm-label{display:inline-block;color:#fff;padding:6px 12px;border-radius:6px;font-size:0.9em;margin-bottom:4px;}
.mm-children{padding-left:16px;}
.mm-child{border-left:3px solid;padding:4px 0 4px 10px;margin:2px 0;font-size:0.8em;color:var(--dim);line-height:1.5;}