/* ================= UI交互动效必修课 · 有声书播放器样式 ================= */
:root{
  --bg:#0f1115;
  --bg-2:#151922;
  --bg-3:#1c2130;
  --line:#252b3a;
  --line-2:#2f3749;
  --txt:#e8ecf5;
  --txt-2:#98a2b8;
  --txt-3:#69748c;
  --accent:#ff5a3c;
  --accent-2:#ff8a5c;
  --accent-soft:rgba(255,90,60,.14);
  --gold:#f0b655;
  --side-w:350px;
}
*{box-sizing:border-box;margin:0;padding:0}
html,body{height:100%}
body{
  background:var(--bg);
  color:var(--txt);
  font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
  -webkit-font-smoothing:antialiased;
  overflow:hidden;
}
#app{display:flex;height:100vh;height:100dvh}

/* ================= 侧栏 ================= */
.sidebar{
  width:var(--side-w);flex:0 0 var(--side-w);
  background:var(--bg-2);
  border-right:1px solid var(--line);
  display:flex;flex-direction:column;min-height:0;
}
.side-head{padding:16px 16px 10px;display:flex;align-items:center;justify-content:space-between;gap:8px}
.brand{display:flex;align-items:center;gap:11px;min-width:0}
.brand-logo{
  width:42px;height:42px;flex:0 0 42px;border-radius:12px;
  background:linear-gradient(135deg,var(--accent),#ffb03c);
  display:grid;place-items:center;font-size:20px;font-weight:800;color:#fff;
  box-shadow:0 6px 18px rgba(255,90,60,.3);
}
.brand-txt{min-width:0}
.brand-txt h1{font-size:15px;font-weight:700;letter-spacing:.2px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.brand-txt p{font-size:11.5px;color:var(--txt-2);margin-top:3px}

.search-wrap{position:relative;margin:6px 14px 10px;display:flex;align-items:center}
.search-ico{position:absolute;left:12px;font-size:13px;opacity:.55;pointer-events:none}
#search{
  width:100%;padding:10px 34px 10px 34px;
  background:var(--bg-3);border:1px solid var(--line);
  border-radius:10px;color:var(--txt);font-size:13.5px;outline:none;transition:.15s;
}
#search::placeholder{color:var(--txt-3)}
#search:focus{border-color:var(--accent);background:#20263a;box-shadow:0 0 0 3px var(--accent-soft)}
#search::-webkit-search-cancel-button{display:none}
.clear-btn{
  position:absolute;right:8px;background:none;border:none;color:var(--txt-3);
  font-size:13px;cursor:pointer;padding:4px 6px;border-radius:6px;
}
.clear-btn:hover{color:var(--txt);background:var(--line)}

.side-tabs{display:flex;gap:4px;padding:0 14px 8px}
.tab{
  flex:1;background:none;border:none;color:var(--txt-2);font-size:13px;
  padding:7px 4px;border-radius:8px;cursor:pointer;transition:.15s;
  display:flex;align-items:center;justify-content:center;gap:5px;
}
.tab:hover{color:var(--txt);background:var(--bg-3)}
.tab.active{color:var(--accent);background:var(--accent-soft);font-weight:600}
.pill{
  background:var(--line-2);color:var(--txt-2);font-size:10.5px;
  padding:1px 6px;border-radius:9px;min-width:18px;text-align:center;
}
.tab.active .pill{background:var(--accent);color:#fff}

.list-head{
  display:flex;justify-content:space-between;align-items:center;
  padding:4px 16px 8px;font-size:11.5px;color:var(--txt-3);
  border-bottom:1px solid var(--line);
}
.list-counts b{color:var(--txt-2)}

/* ---- 章节树 ---- */
.playlist{list-style:none;overflow-y:auto;flex:1;padding:6px 8px 14px;min-height:0}
.playlist::-webkit-scrollbar{width:8px}
.playlist::-webkit-scrollbar-thumb{background:#2b3245;border-radius:4px}
.playlist::-webkit-scrollbar-thumb:hover{background:#3a4358}
.playlist::-webkit-scrollbar-track{background:transparent}

.ch{
  display:flex;align-items:center;gap:10px;
  padding:10px 10px;border-radius:9px;cursor:pointer;
  transition:background .12s;position:relative;user-select:none;
}
.ch:hover{background:var(--bg-3)}
.ch.cur{background:var(--accent-soft)}
.ch-num{
  flex:0 0 26px;height:26px;border-radius:8px;display:grid;place-items:center;
  font-size:12.5px;font-weight:800;color:var(--txt-2);background:var(--line);
  font-variant-numeric:tabular-nums;
}
.ch.cur .ch-num{background:var(--accent);color:#fff}
.ch-body{flex:1;min-width:0}
.ch-title{
  font-size:13.5px;line-height:1.35;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}
.ch.cur .ch-title{color:var(--accent);font-weight:600}
.ch-meta{font-size:11px;color:var(--txt-3);margin-top:3px;display:flex;gap:8px;flex-wrap:wrap}
.ch-meta .done{color:#5fd08a}
.ch-meta .dot{opacity:.5}
.chev{
  flex:0 0 16px;font-size:10px;color:var(--txt-3);transition:transform .18s;
  background:none;border:none;cursor:pointer;padding:2px;
}
.chev.open{transform:rotate(90deg)}
.chev.hidden{visibility:hidden}

/* 小节行 */
.sec{
  display:flex;align-items:center;gap:9px;
  padding:8px 10px 8px 30px;border-radius:8px;cursor:pointer;
  font-size:12.5px;color:var(--txt-2);transition:background .12s;
}
.sec:hover{background:var(--bg-3);color:var(--txt)}
.sec.cur{background:var(--accent-soft);color:var(--accent);font-weight:600}
.sec-id{flex:0 0 auto;font-variant-numeric:tabular-nums;opacity:.75;font-size:11.5px}
.sec-name{flex:1;min-width:0;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}

.bars{display:none;gap:2px;align-items:flex-end;height:12px;flex:0 0 13px}
.ch.cur.playing .bars,.sec.cur.playing .bars{display:flex}
.bars i{width:2.5px;background:var(--accent);border-radius:1px;animation:bar .9s ease-in-out infinite}
.bars i:nth-child(1){height:40%;animation-delay:-.2s}
.bars i:nth-child(2){height:100%;animation-delay:-.5s}
.bars i:nth-child(3){height:65%;animation-delay:-.1s}
@keyframes bar{0%,100%{transform:scaleY(.35)}50%{transform:scaleY(1)}}

.it-fav{
  background:none;border:none;color:var(--txt-3);cursor:pointer;
  font-size:14px;padding:2px 3px;border-radius:6px;opacity:0;transition:.15s;flex:0 0 auto;
}
.ch:hover .it-fav,.it-fav.on{opacity:1}
.it-fav.on{color:var(--accent)}

.empty{padding:40px 20px;text-align:center;color:var(--txt-3);font-size:13px;line-height:1.9}

.side-foot{padding:10px 14px;border-top:1px solid var(--line)}
.ghost-btn{
  width:100%;padding:10px;border-radius:10px;cursor:pointer;
  background:var(--bg-3);border:1px solid var(--line-2);color:var(--txt-2);
  font-size:13px;transition:.15s;font-family:inherit;
}
.ghost-btn:hover{color:var(--txt);border-color:var(--accent);background:var(--accent-soft)}

/* ================= 主区 ================= */
.main{flex:1;display:flex;flex-direction:column;min-width:0;min-height:0;position:relative}
.topbar{
  height:54px;display:flex;align-items:center;gap:12px;
  padding:0 18px;border-bottom:1px solid var(--line);flex:0 0 auto;
}
.now-title{flex:1;min-width:0;font-size:13px;color:var(--txt-2);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.top-actions{display:flex;gap:6px}
.icon-btn{
  width:34px;height:34px;display:grid;place-items:center;border-radius:9px;
  background:var(--bg-3);border:1px solid var(--line);color:var(--txt-2);
  cursor:pointer;font-size:15px;text-decoration:none;transition:.15s;
}
.icon-btn:hover{color:var(--txt);border-color:var(--line-2)}
.only-mobile{display:none}

.stage{
  flex:1;display:flex;flex-direction:column;align-items:center;
  padding:18px 22px 14px;gap:13px;min-height:0;overflow:hidden;
  background:radial-gradient(900px 460px at 50% -12%,rgba(255,90,60,.10),transparent 62%);
}

/* 封面 */
.cover{position:relative;width:132px;height:132px;flex:0 0 auto}
.cover-inner{
  width:100%;height:100%;border-radius:22px;
  background:linear-gradient(145deg,#e8492e,#ff7a3c 55%,#ffb03c);
  border:1px solid rgba(255,255,255,.12);
  box-shadow:0 16px 44px rgba(0,0,0,.55);
  display:flex;flex-direction:column;align-items:center;justify-content:center;
  overflow:hidden;position:relative;z-index:1;text-align:center;padding:0;
}
.cover-img{width:100%;height:100%;object-fit:cover;display:none}
.cover-img.show{display:block}
.cover-fallback{display:flex;flex-direction:column;align-items:center;justify-content:center;padding:8px}
.cover-fallback.hide{display:none}
.cover-glow{position:absolute;inset:0;border-radius:22px;pointer-events:none;
  background:radial-gradient(120% 90% at 50% 0%,rgba(255,255,255,.18),transparent 60%);}
.cover-ch{font-size:44px;font-weight:800;color:#fff;line-height:1;letter-spacing:-1px;text-shadow:0 2px 12px rgba(0,0,0,.18)}
.cover-txt{font-size:10.5px;color:rgba(255,255,255,.92);margin-top:6px;letter-spacing:.5px;font-weight:600}
.cover-ring{
  position:absolute;inset:-14px;border-radius:50%;
  border:1px solid rgba(255,90,60,.18);
  opacity:0;transition:opacity .3s;pointer-events:none;
}
.cover-ring.r2{inset:-26px;border-color:rgba(255,150,90,.12)}
body.playing .cover-ring{opacity:1;animation:pulse 2.6s ease-out infinite}
body.playing .cover-ring.r2{animation-delay:.7s}
@keyframes pulse{0%{transform:scale(.94);opacity:.55}100%{transform:scale(1.08);opacity:0}}

.track-head{text-align:center;max-width:720px;flex:0 0 auto;padding:0 8px}
.badge{
  display:inline-block;font-size:11px;font-weight:700;letter-spacing:.5px;
  background:var(--accent-soft);color:var(--accent);border-radius:20px;
  padding:3px 11px;margin-bottom:8px;
}
.track-title{font-size:19px;font-weight:700;line-height:1.35}
.track-sub{font-size:12px;color:var(--txt-3);margin-top:5px}

/* 阅读区 */
.reader{
  width:100%;max-width:760px;flex:1 1 auto;min-height:120px;
  background:var(--bg-2);border:1px solid var(--line);border-radius:14px;
  display:flex;flex-direction:column;overflow:hidden;
}
.reader-head{
  display:flex;align-items:center;justify-content:space-between;gap:10px;
  padding:9px 14px;border-bottom:1px solid var(--line);flex:0 0 auto;
  font-size:11.5px;color:var(--txt-3);letter-spacing:.4px;
}
.reader-right{display:flex;align-items:center;gap:8px}
.engine{
  font-size:10.5px;padding:2px 8px;border-radius:20px;
  background:rgba(95,208,138,.12);color:#5fd08a;border:1px solid rgba(95,208,138,.3);
  max-width:220px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;
}
.mini-btn{
  background:none;border:1px solid var(--line-2);color:var(--txt-3);
  font-size:11px;padding:3px 9px;border-radius:20px;cursor:pointer;font-family:inherit;
}
.mini-btn.on{color:var(--accent);border-color:var(--accent);background:var(--accent-soft)}
.mini-btn b{font-weight:700}

.reader-body{
  flex:1 1 auto;overflow-y:auto;padding:14px 20px 22px;
  font-size:15px;line-height:1.95;color:#c9d1e0;scroll-behavior:smooth;
}
.reader-body::-webkit-scrollbar{width:8px}
.reader-body::-webkit-scrollbar-thumb{background:#2b3245;border-radius:4px}
.reader-body p{margin:0 0 12px;text-align:justify;overflow-wrap:anywhere;transition:background .25s,color .25s}
.reader-body p.speak{
  background:linear-gradient(90deg,rgba(255,90,60,.16),rgba(255,90,60,.03));
  color:#fff;border-radius:8px;
  box-shadow:-10px 0 0 rgba(255,90,60,.5) inset;
  padding-left:10px;margin-left:-10px;
}
.reader-body p.speak.pending{opacity:.8}
.reader-empty{color:var(--txt-3);text-align:center!important;padding:36px 0;font-size:13.5px}
.reader-fig{margin:12px 0;text-align:center}
.reader-fig img{max-width:100%;border-radius:8px;border:1px solid var(--line);cursor:zoom-in;background:#fff}
.reader-fig figcaption{font-size:11.5px;color:var(--txt-3);margin-top:5px}

/* 进度 */
.progress-row{display:flex;align-items:center;gap:12px;width:100%;max-width:720px;flex:0 0 auto}
.time{font-size:11.5px;color:var(--txt-3);font-variant-numeric:tabular-nums;flex:0 0 42px;text-align:center}
.progress{flex:1;height:20px;position:relative;cursor:pointer;display:flex;align-items:center}
.progress-bg{position:absolute;left:0;right:0;height:5px;background:var(--line-2);border-radius:3px}
.progress-buf{position:absolute;left:0;height:5px;width:0;background:#3c4560;border-radius:3px}
.progress-fill{position:absolute;left:0;height:5px;width:0;background:linear-gradient(90deg,var(--accent),var(--accent-2));border-radius:3px;z-index:1}
.progress-dot{
  position:absolute;width:13px;height:13px;border-radius:50%;background:#fff;
  left:0;transform:translateX(-50%);opacity:0;transition:opacity .15s;z-index:2;
  box-shadow:0 2px 8px rgba(0,0,0,.5);
}
.progress:hover .progress-dot,.progress:focus .progress-dot,.progress.drag .progress-dot{opacity:1}
.progress:hover .progress-fill{background:var(--accent-2)}

/* 控制条 */
.controls{display:flex;align-items:center;gap:16px;flex:0 0 auto}
.ctl{
  background:var(--bg-3);border:1px solid var(--line);color:var(--txt);
  width:46px;height:46px;border-radius:50%;cursor:pointer;font-size:17px;
  display:grid;place-items:center;transition:.15s;
}
.ctl:hover{border-color:var(--accent);color:var(--accent);transform:translateY(-1px)}
.ctl:active{transform:translateY(0) scale(.96)}
.ctl.small{width:40px;height:40px;font-size:15px;color:var(--txt-2)}
.ctl.tiny{width:32px;height:32px;font-size:13px;color:var(--txt-2)}
.ctl.primary{
  width:62px;height:62px;font-size:22px;color:#fff;border:none;
  background:linear-gradient(135deg,var(--accent),var(--accent-2));
  box-shadow:0 10px 26px rgba(255,90,60,.4);
}
.ctl.primary:hover{color:#fff;box-shadow:0 12px 32px rgba(255,90,60,.55)}
#btnFav.on{color:var(--accent);border-color:var(--accent)}
#btnMode.one{color:var(--accent);border-color:var(--accent)}

/* 次级控制 */
.sub-controls{display:flex;align-items:center;gap:22px;flex-wrap:wrap;justify-content:center;flex:0 0 auto}
.vol-wrap{display:flex;align-items:center;gap:8px}
#volume{
  -webkit-appearance:none;appearance:none;width:104px;height:4px;
  background:var(--line-2);border-radius:2px;outline:none;cursor:pointer;
}
#volume::-webkit-slider-thumb{
  -webkit-appearance:none;width:13px;height:13px;border-radius:50%;
  background:#fff;cursor:pointer;box-shadow:0 1px 5px rgba(0,0,0,.5);
}
#volume::-moz-range-thumb{width:13px;height:13px;border:none;border-radius:50%;background:#fff;cursor:pointer}
.rate-wrap{display:flex;align-items:center;gap:6px}
.rate-label{font-size:12.5px;color:var(--txt-2);min-width:38px;text-align:center;font-variant-numeric:tabular-nums}

.rate-chips{display:flex;gap:6px;flex-wrap:wrap;justify-content:center;flex:0 0 auto}
.rate-chips button{
  background:var(--bg-3);border:1px solid var(--line);color:var(--txt-2);
  font-size:12px;padding:5px 11px;border-radius:20px;cursor:pointer;transition:.15s;font-family:inherit;
}
.rate-chips button:hover{color:var(--txt);border-color:var(--line-2)}
.rate-chips button.on{background:var(--accent-soft);border-color:var(--accent);color:var(--accent);font-weight:600}

/* 状态栏 */
.statusbar{
  height:32px;flex:0 0 auto;border-top:1px solid var(--line);
  display:flex;align-items:center;justify-content:space-between;
  padding:0 18px;font-size:11.5px;color:var(--txt-3);gap:12px;
}
#statusText{overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
#miniInfo{flex:0 0 auto;opacity:.8}

/* toast */
.toast{
  position:fixed;left:50%;bottom:86px;transform:translateX(-50%);
  background:#232a3c;border:1px solid var(--line-2);color:var(--txt);
  padding:10px 18px;border-radius:10px;font-size:13px;z-index:99;
  box-shadow:0 10px 30px rgba(0,0,0,.5);animation:tin .2s ease-out;
  max-width:80vw;text-align:center;
}
@keyframes tin{from{opacity:0;transform:translate(-50%,8px)}to{opacity:1;transform:translate(-50%,0)}}

/* 弹出面板 */
.popover{
  position:fixed;background:var(--bg-3);border:1px solid var(--line-2);
  border-radius:12px;padding:8px;z-index:100;min-width:160px;
  box-shadow:0 14px 40px rgba(0,0,0,.6);
}
.pop-head{font-size:11.5px;color:var(--txt-3);padding:5px 10px 8px;border-bottom:1px solid var(--line);margin-bottom:5px}
.popover button{
  display:block;width:100%;text-align:left;background:none;border:none;
  color:var(--txt-2);font-size:13px;padding:8px 10px;border-radius:7px;cursor:pointer;font-family:inherit;
}
.popover button:hover{background:var(--line);color:var(--txt)}
#voiceList button.cur{color:var(--accent);background:var(--accent-soft)}
#voiceList button small{color:var(--txt-3);font-size:10.5px;margin-left:6px}

/* 图片查看 */
.img-viewer{
  position:fixed;inset:0;background:rgba(0,0,0,.88);z-index:200;
  display:grid;place-items:center;padding:20px;cursor:zoom-out;
}
.img-viewer img{max-width:100%;max-height:100%;border-radius:6px}

/* ================= 移动端 ================= */
@media(max-width:820px){
  .only-mobile{display:grid}
  .sidebar{
    position:fixed;top:0;left:0;bottom:0;z-index:60;width:86vw;flex-basis:86vw;
    transform:translateX(-100%);transition:transform .26s ease;
    box-shadow:22px 0 50px rgba(0,0,0,.6);
  }
  body.side-open .sidebar{transform:translateX(0)}
  body.side-open::after{
    content:"";position:fixed;inset:0;background:rgba(0,0,0,.5);z-index:55;
  }
  .cover{width:96px;height:96px}
  .cover-ch{font-size:32px}
  .cover-txt{font-size:9px}
  .track-title{font-size:16.5px}
  .ctl.primary{width:56px;height:56px;font-size:20px}
  .controls{gap:12px}
  #volume{width:72px}
  .stage{padding:12px 12px 10px;gap:10px}
  .reader-body{font-size:14px;line-height:1.9;padding:12px 15px 18px}
  .rate-chips{display:none}
  .sub-controls{gap:14px}
}
@media(max-width:380px){
  .rate-chips{display:flex}
}
@media(max-height:680px){
  .cover{display:none}
}