:root{
  --bg:#0b0e14; --card:#151a23; --card2:#1b2230; --line:#26303f;
  --fg:#e7edf5; --dim:#93a1b5; --acc:#5b8cff; --acc2:#7c5cff;
  --ok:#3ecf8e; --err:#ff6b6b; --radius:14px;
}
*{box-sizing:border-box}
html,body{margin:0;padding:0}
body{
  background:radial-gradient(1200px 600px at 50% -200px,#1b2540 0%,var(--bg) 60%) no-repeat,var(--bg);
  color:var(--fg); min-height:100vh;
  font:16px/1.6 -apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
  -webkit-font-smoothing:antialiased;
}
.wrap{max-width:820px;margin:0 auto;padding:40px 20px 64px}

/* hero */
.hero{text-align:center;margin-bottom:28px}
.hero h1{font-size:clamp(24px,4.4vw,36px);margin:0 0 10px;letter-spacing:-.02em}
.hero .note{background:linear-gradient(135deg,var(--acc),var(--acc2));-webkit-background-clip:text;background-clip:text;color:transparent}
.hero .sub{color:var(--dim);margin:0;font-size:15px}
.hero code{background:#0d1219;border:1px solid var(--line);border-radius:6px;padding:1px 6px;font-size:13px}

/* cards */
.card{
  background:linear-gradient(180deg,var(--card),var(--card2));
  border:1px solid var(--line); border-radius:var(--radius);
  padding:20px; margin-bottom:16px;
}
.card label{display:block;font-size:13px;color:var(--dim);margin-bottom:8px;font-weight:600}
.row{display:flex;gap:10px;flex-wrap:wrap}
input[type=text]{
  flex:1 1 320px; min-width:0;
  background:#0d1219;border:1px solid var(--line);border-radius:10px;
  color:var(--fg);padding:12px 14px;font-size:15px;outline:none;
}
input[type=text]:focus{border-color:var(--acc);box-shadow:0 0 0 3px rgba(91,140,255,.16)}
button{
  font:inherit;font-weight:600;cursor:pointer;border-radius:10px;
  border:1px solid transparent;padding:12px 20px;color:#fff;
  background:linear-gradient(135deg,var(--acc),var(--acc2));
  transition:filter .15s,opacity .15s;
}
button:hover:not(:disabled){filter:brightness(1.1)}
button:disabled{opacity:.55;cursor:not-allowed}
.status{margin:12px 0 0;font-size:14px;color:var(--dim);min-height:1.4em}
.status:empty{margin:0}
.status.error{color:var(--err)}

/* song card */
.song-card{display:flex;gap:18px;align-items:flex-start}
.song-card.hidden,.hidden{display:none !important}
.cover{
  width:112px;height:112px;flex:0 0 112px;border-radius:12px;object-fit:cover;
  background:#0d1219;border:1px solid var(--line);
}
.details{flex:1;min-width:0}
.song-title{margin:0 0 4px;font-size:19px;line-height:1.35;word-break:break-word}
.badge{display:inline-block;margin-left:8px;font-size:11px;font-weight:700;vertical-align:middle;
  color:var(--ok);background:rgba(62,207,142,.12);border:1px solid rgba(62,207,142,.3);
  border-radius:999px;padding:2px 8px}
.artist{margin:0 0 2px;color:var(--fg);font-size:14px}
.meta{margin:0 0 14px;color:var(--dim);font-size:13px}
audio{width:100%;margin-bottom:14px;height:38px;filter:invert(.92) hue-rotate(180deg)}
.downloads{display:flex;gap:10px;flex-wrap:wrap}
.dl{background:#222c3d;border-color:var(--line)}
.dl.primary{background:linear-gradient(135deg,var(--acc),var(--acc2))}
.error-note{color:var(--err);font-size:14px;margin:0}

/* playlist */
.pl-head h2{margin:0 0 4px;font-size:18px}
.pl-actions{display:flex;gap:10px;flex-wrap:wrap;margin:14px 0 4px}
.pl-list{list-style:none;margin:12px 0 0;padding:0;max-height:420px;overflow:auto;
  border-top:1px solid var(--line)}
.pl-list li{display:flex;gap:12px;align-items:center;padding:10px 2px;border-bottom:1px solid var(--line)}
.pl-list img{width:40px;height:40px;border-radius:8px;flex:0 0 40px;object-fit:cover;background:#0d1219}
.pl-list .t{flex:1;min-width:0;font-size:14px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.pl-list .d{color:var(--dim);font-size:12px;flex:0 0 auto;font-variant-numeric:tabular-nums}
.pl-list .st{flex:0 0 60px;text-align:right;font-size:12px;color:var(--dim)}
.pl-list .st.done{color:var(--ok)}
.pl-list .st.fail{color:var(--err)}

/* notes */
.notes summary{cursor:pointer;font-weight:600;color:var(--dim)}
.notes ol{margin:14px 0 10px;padding-left:22px;color:var(--dim);font-size:14px}
.notes .fine{font-size:12.5px;color:#6b7889;line-height:1.7;margin:10px 0 0;
  border-top:1px solid var(--line);padding-top:12px}
.foot{text-align:center;color:#5b6675;font-size:12.5px;margin-top:26px}

@media (max-width:560px){
  .song-card{flex-direction:column}
  .cover{width:100%;height:auto;aspect-ratio:1;flex:none}
  .wrap{padding:26px 14px 48px}
}