*{box-sizing:border-box;margin:0;padding:0}

/* hidden 属性必须压得住后面的 display:flex/grid，否则元素藏不起来 */
[hidden]{display:none !important}

:root{
  --bg:#F7F6F3;
  --card:#FFFFFF;
  --ink:#1B1A17;
  --ink-2:#565249;
  --ink-3:#8C877C;
  --line:#E8E4DB;
  --line-2:#D9D4C8;
  --accent:#B44B26;
  --accent-soft:#FAEDE6;
  --radius:18px;
  --shadow:0 1px 2px rgba(28,26,22,.04), 0 8px 24px -12px rgba(28,26,22,.14);
}

html{-webkit-text-size-adjust:100%}

body{
  background:var(--bg);
  color:var(--ink);
  font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
  font-size:15px;
  line-height:1.6;
  min-height:100vh;
  padding:32px 20px 48px;
}

.wrap{max-width:1060px;margin:0 auto}

/* header */
.site-head{
  display:flex;align-items:center;justify-content:space-between;
  gap:16px;margin-bottom:28px;flex-wrap:wrap;
}
.brand{display:flex;align-items:center;gap:12px}
.brand-mark{
  width:42px;height:42px;flex:0 0 42px;border-radius:12px;
  display:grid;place-items:center;
  background:var(--accent-soft);color:var(--accent);
  border:1px solid #F0D9CE;
}
.brand-mark svg{width:21px;height:21px}
.brand-text h1{font-size:19px;font-weight:600;letter-spacing:-.01em;line-height:1.3}
.brand-text p{font-size:12.5px;color:var(--ink-3);margin-top:1px}
.badge{
  font-size:12px;color:var(--ink-2);
  background:var(--card);border:1px solid var(--line);
  padding:4px 11px;border-radius:999px;white-space:nowrap;
}

/* layout */
.layout{display:grid;grid-template-columns:1.05fr .95fr;gap:18px;align-items:start}

/* now playing card */
.now{
  background:var(--card);border:1px solid var(--line);
  border-radius:var(--radius);box-shadow:var(--shadow);
  padding:24px;position:relative;overflow:hidden;
}

.cover-box{
  position:relative;width:100%;aspect-ratio:1/1;max-width:300px;
  margin:0 auto 20px;border-radius:14px;overflow:hidden;
  background:#EFEBE2;border:1px solid var(--line);
  display:grid;place-items:center;
}
.cover-box img{width:100%;height:100%;object-fit:cover;display:block}
.cover-fallback{color:#C4BEB0;display:grid;place-items:center;width:100%;height:100%}
.cover-fallback svg{width:54px;height:54px}
.cover-glow{
  position:absolute;inset:0;pointer-events:none;
  box-shadow:inset 0 0 0 1px rgba(255,255,255,.5);
  border-radius:14px;
}

.meta{text-align:center;margin-bottom:20px}
.eyebrow{
  font-size:11px;letter-spacing:.12em;text-transform:uppercase;
  color:var(--accent);font-weight:600;margin-bottom:6px;
}
.meta h2{
  font-size:19px;font-weight:600;letter-spacing:-.01em;line-height:1.35;
  overflow:hidden;text-overflow:ellipsis;white-space:nowrap;
}
.meta .artist{font-size:13px;color:var(--ink-3);margin-top:3px}

/* timeline */
.timeline{margin-bottom:18px}
.bar{
  position:relative;height:22px;display:flex;align-items:center;cursor:pointer;
  touch-action:none;outline:none;
  background:linear-gradient(var(--line),var(--line)) center/100% 5px no-repeat;
  border-radius:999px;
}
.bar-fill{
  position:relative;height:5px;width:0%;
  background:var(--accent);border-radius:999px;
}
.bar-knob{
  position:absolute;right:-5px;top:50%;transform:translateY(-50%) scale(.6);
  width:11px;height:11px;border-radius:50%;background:var(--accent);
  opacity:0;transition:opacity .15s,transform .15s;
  box-shadow:0 1px 3px rgba(0,0,0,.18);
}
.bar:hover .bar-knob,.bar:focus-visible .bar-knob{opacity:1;transform:translateY(-50%) scale(1)}
.time{
  display:flex;justify-content:space-between;
  font-size:11.5px;color:var(--ink-3);font-variant-numeric:tabular-nums;
  margin-top:2px;
}

/* controls */
.controls{
  display:flex;align-items:center;justify-content:center;gap:6px;
  margin-bottom:14px;
}
.icon-btn{
  appearance:none;border:0;background:transparent;color:var(--ink-2);
  width:38px;height:38px;border-radius:10px;cursor:pointer;
  display:grid;place-items:center;position:relative;
  transition:background .15s,color .15s;
}
.icon-btn svg{width:19px;height:19px}
.icon-btn:hover{background:#F2EFE8;color:var(--ink)}
.icon-btn.on{color:var(--accent);background:var(--accent-soft)}
.repeat-one{
  position:absolute;bottom:5px;right:6px;
  font-size:9px;font-weight:700;line-height:1;
  background:var(--accent);color:#fff;border-radius:3px;padding:1px 2px;
}
.play-btn{
  appearance:none;border:0;cursor:pointer;
  width:54px;height:54px;border-radius:50%;
  background:var(--ink);color:#fff;
  display:grid;place-items:center;margin:0 4px;
  transition:transform .12s ease,background .15s;
  box-shadow:0 6px 16px -6px rgba(27,26,23,.5);
}
.play-btn svg{width:22px;height:22px}
.play-btn:hover{background:#000;transform:scale(1.04)}
.play-btn:active{transform:scale(.96)}

/* volume */
.volume{
  display:flex;align-items:center;gap:9px;
  padding-top:14px;border-top:1px solid var(--line);
  color:var(--ink-3);
}
.volume svg{width:16px;height:16px;flex:0 0 16px}
input[type=range]{
  -webkit-appearance:none;appearance:none;flex:1;height:16px;
  background:transparent;cursor:pointer;
}
input[type=range]::-webkit-slider-runnable-track{
  height:4px;border-radius:999px;background:var(--line);
}
input[type=range]::-webkit-slider-thumb{
  -webkit-appearance:none;appearance:none;
  width:12px;height:12px;border-radius:50%;background:var(--ink-2);
  margin-top:-4px;border:0;
}
input[type=range]::-moz-range-track{height:4px;border-radius:999px;background:var(--line)}
input[type=range]::-moz-range-thumb{width:12px;height:12px;border:0;border-radius:50%;background:var(--ink-2)}

/* list */
.list-panel{
  background:var(--card);border:1px solid var(--line);
  border-radius:var(--radius);box-shadow:var(--shadow);
  padding:20px 8px 12px;display:flex;flex-direction:column;
  max-height:min(560px,calc(100vh - 160px));
}
.list-head{
  display:flex;align-items:baseline;justify-content:space-between;
  gap:10px;padding:0 14px 12px;
}
.list-head h3{font-size:14px;font-weight:600;letter-spacing:-.01em}
.list-head span{font-size:11.5px;color:var(--ink-3);overflow:hidden;text-overflow:ellipsis;white-space:nowrap}

/* 目录 + 曲目 两栏 */
.lib{display:flex;gap:2px;flex:1;min-height:0}
.folders{
  flex:0 0 172px;width:172px;min-height:0;
  overflow-y:auto;overscroll-behavior:contain;
  display:flex;flex-direction:column;gap:2px;
  padding:0 2px 6px 8px;
  border-right:1px solid var(--line);
}
.folders::-webkit-scrollbar{width:7px}
.folders::-webkit-scrollbar-thumb{background:var(--line-2);border-radius:99px;border:2px solid var(--card)}
.folders[hidden]{display:none}

.folder{
  appearance:none;border:0;background:transparent;
  display:flex;align-items:center;gap:6px;
  width:100%;padding:7px 8px;border-radius:9px;
  font:inherit;font-size:12.5px;color:var(--ink-2);
  text-align:left;cursor:pointer;
  transition:background .13s,color .13s;
}
.folder:hover{background:#F7F4ED}
.folder:focus-visible{outline:2px solid var(--accent);outline-offset:-2px}
.folder.active{background:var(--accent-soft);color:var(--accent);font-weight:600}
.folder.up{color:var(--ink-3);font-size:12px;margin-bottom:2px}
.folder.up:hover{color:var(--ink-2)}
.folder .fname{flex:1;min-width:0;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.folder .fcount{
  font-size:10.5px;color:var(--ink-3);font-variant-numeric:tabular-nums;
  flex:0 0 auto;
}
.folder.active .fcount{color:var(--accent)}
.folder .ficon{width:13px;height:13px;flex:0 0 13px;opacity:.55}
.folder.active .ficon{opacity:.9}

.tracks-wrap{flex:1;min-width:0;display:flex;flex-direction:column;min-height:0}

.playlist{list-style:none;overflow-y:auto;overscroll-behavior:contain;padding:0 6px 4px;flex:1;min-height:0}
.playlist::-webkit-scrollbar{width:8px}
.playlist::-webkit-scrollbar-thumb{background:var(--line-2);border-radius:99px;border:2px solid var(--card)}

.track{
  display:flex;align-items:center;gap:10px;
  padding:8px 10px;border-radius:11px;cursor:pointer;
  transition:background .13s;
}
.track:hover{background:#F7F4ED}
.track.active{background:var(--accent-soft)}
.track:focus-visible{outline:2px solid var(--accent);outline-offset:-2px}

.track .thumb{
  width:30px;height:30px;flex:0 0 30px;border-radius:6px;
  object-fit:cover;background:#EFEBE2;border:1px solid var(--line);
  opacity:.94;transition:opacity .13s;
}
.track:hover .thumb,.track.active .thumb{opacity:1}

.track .idx{
  width:20px;flex:0 0 20px;text-align:center;
  font-size:11.5px;color:var(--ink-3);font-variant-numeric:tabular-nums;
}
.track.active .idx{color:var(--accent)}

.eq{display:none;gap:2px;align-items:flex-end;height:12px}
.eq i{display:block;width:2.5px;background:var(--accent);border-radius:1px;height:4px}
.track.active.playing .eq{display:flex}
.track.active.playing .idx{display:none}
.is-playing .eq i{animation:eq .9s ease-in-out infinite}
.is-playing .eq i:nth-child(2){animation-delay:.22s}
.is-playing .eq i:nth-child(3){animation-delay:.44s}
@keyframes eq{0%,100%{height:3px}50%{height:12px}}
@media (prefers-reduced-motion:reduce){.is-playing .eq i{animation:none;height:8px}}

.track .txt{min-width:0;flex:1;display:flex;flex-direction:column;gap:1px}
.track .t-title{
  display:block;
  font-size:13.5px;font-weight:500;line-height:1.35;
  overflow:hidden;text-overflow:ellipsis;white-space:nowrap;
}
.track.active .t-title{color:var(--accent)}
.track .t-artist{
  display:block;
  font-size:11px;color:var(--ink-3);line-height:1.3;
  overflow:hidden;text-overflow:ellipsis;white-space:nowrap;
}
.track .dur{
  font-size:11px;color:var(--ink-3);font-variant-numeric:tabular-nums;
  flex:0 0 auto;
}

.empty{
  padding:26px 16px;font-size:13px;color:var(--ink-3);text-align:center;line-height:1.7;
}
.empty code{
  background:#F2EFE8;padding:1px 5px;border-radius:4px;
  font-family:ui-monospace,SFMono-Regular,Menlo,monospace;font-size:12px;
}

.foot{
  margin-top:20px;text-align:center;
  font-size:11.5px;color:var(--ink-3);
}

/* responsive */
@media (max-width:860px){
  body{padding:24px 16px 40px}
  .layout{grid-template-columns:1fr;gap:14px}
  .now{padding:20px}
  .cover-box{max-width:min(240px,62vw);margin-bottom:18px}
  .list-panel{max-height:none}
  .playlist{max-height:52vh}
  .brand-text h1{font-size:17px}

  /* 目录改成横向可滑动的胶囊 */
  .lib{flex-direction:column;gap:0}
  .folders{
    flex:0 0 auto;width:auto;flex-direction:row;
    overflow-x:auto;overflow-y:hidden;
    padding:0 12px 10px;gap:6px;
    border-right:0;border-bottom:1px solid var(--line);
    margin-bottom:8px;
    scrollbar-width:none;
  }
  .folders::-webkit-scrollbar{display:none}
  .folder{
    flex:0 0 auto;width:auto;white-space:nowrap;
    border:1px solid var(--line);border-radius:999px;
    padding:5px 11px;
  }
  .folder.active{border-color:var(--accent)}
  .folder .fcount{display:none}
  .folder .ficon{display:none}
}
@media (max-width:400px){
  .icon-btn{width:34px;height:34px}
  .play-btn{width:50px;height:50px}
}