/* ===============================
   THEME
=============================== */
:root{
  --bg:#000;
  --panel:#444;
  --text:#fff;
  --muted:#ccc;
  --line-2:#eee;
}
/* ===============================
   BASE
=============================== */
* {
  box-sizing:border-box;
}
/* ===============================
   MUSIC PLAYER LAYOUT
=============================== */
.music-wrap{
  max-width:980px;
  margin:40px auto;
  padding:0 16px;
}
.music-hero{
  display:grid;
  grid-template-columns:140px 1fr;
  gap:16px;
  align-items:center;
  background:var(--panel);
  border:1px solid var(--line-2);
  border-radius:12px;
  padding:16px;
}
.music-cover{
  width:140px;
  height:140px;
  object-fit:cover;
  border-radius:8px;
  user-select:none;
}
.music-meta h2{
  margin:0 0 4px;
  font-size:20px;
  line-height:1.2;
}
.music-meta p{
  margin:0 0 12px;
  color:var(--brand);
}
/* Controls row: prev/play/next | timeline | volume */
.controls{
  display:grid;
  grid-template-columns:auto 1fr auto;
  gap:12px;
  align-items:center;
}
.btns{
  display:inline-flex;
  gap:10px;
}
.btns button{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  border:1px solid #ddd;
  background:#fff;
  color:#000;
  border-radius:8px;
  padding:8px 12px;
  cursor:pointer;
}
.btns button:focus-visible,
.timeline input:focus-visible,
.volume input:focus-visible{ 
  outline:2px solid var(--brand);
  outline-offset:2px;
}
/* Timeline (seek) */
.timeline{
  display:grid;
  grid-template-columns:auto 1fr auto;
  gap:8px;
  align-items:center;
}
.timeline .time{
  font-variant-numeric:tabular-nums;
  font-size:12px;
  color:#444;
}
.timeline input[type="range"]{
  width:100%; 
  accent-color:#111;
}
/* Volume */
.volume{
  display:inline-flex;
  gap:8px;
  align-items:center;
}
.volume input[type="range"]{
  width:110px;
  accent-color:#6d6d6d;
}
/* ===============================
   PLAYLIST
=============================== */
.playlist{
  margin-top:18px;
  border:1px solid #888;
  border-radius:12px;
  overflow:hidden;
}
.track{
  display:grid;
  grid-template-columns:56px 1fr auto;
  gap:12px;
  align-items:center;
  padding:10px;
  cursor:pointer;
  background:#111;
}
.track + .track{
  border-top:1px solid var(--line-2);
}
.track:hover{
  background:#888;
}
.track.active{
  background:#888;
}
.track img{
  width:56px;
  height:56px;
  object-fit:cover;
  border-radius:6px;
  user-select:none;
}
.t-title{
  margin:0;
  font-weight:600;
}
.t-artist{
  margin:2px 0 0;
  color:var(--brand);
  font-size:14px;
}
/* ===============================
   FOOTER
=============================== */
footer{
  text-align:center;
  font-size:14px;
  color:#777;
  margin:40px 0;
}
/* ===============================
   RESPONSIVE
=============================== */
@media (max-width:640px){
  .music-hero{ grid-template-columns:1fr; text-align:center; }
  .music-cover{ margin:0 auto; }
  .controls{ grid-template-columns:1fr; gap:8px; }
  .timeline{ grid-template-columns:auto 1fr auto; }
  .volume input[type="range"]{ width:90px; }
}