:root {
  color-scheme: dark;
  --bg: #081711;
  --card: #0f1f18;
  --card-2: #143126;
  --text: #f8fafc;
  --muted: #94a3b8;
  --accent: #059669;
  --accent-2: #10b981;
  --danger: #ef4444;
  --border: rgba(255,255,255,.09);
}

* { box-sizing: border-box; }
html, body { margin: 0; min-height: 100%; }
body {
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background:
    radial-gradient(circle at 20% 0%, rgba(16,185,129,.22), transparent 35%),
    var(--bg);
  color: var(--text);
  padding-bottom: 118px;
}
button, input { font: inherit; }
button, .button {
  border: 0;
  border-radius: 12px;
  padding: 12px 18px;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  color: white;
  cursor: pointer;
  text-decoration: none;
  font-weight: 700;
}
.secondary { background: var(--card-2); border: 1px solid var(--border); }
.ghost { background: transparent; border: 1px solid var(--border); }
.muted { color: var(--muted); }
.small { font-size: 13px; }

.topbar {
  position: sticky;
  top: 0;
  z-index: 10;
  display: flex;
  justify-content: space-between;
  gap: 20px;
  align-items: center;
  padding: 18px max(20px, calc((100vw - 920px)/2));
  background: rgba(11,16,32,.82);
  backdrop-filter: blur(18px);
  border-bottom: 1px solid var(--border);
}
.topbar h1 { margin: 0; font-size: 22px; }
.top-actions { display: flex; gap: 10px; }

.container { width: min(920px, calc(100% - 28px)); margin: 28px auto; }
.track-list { display: grid; gap: 10px; }
.track {
  display: grid;
  grid-template-columns: auto 1fr auto auto;
  gap: 14px;
  align-items: center;
  padding: 13px;
  border: 1px solid var(--border);
  background: rgba(18,26,46,.9);
  border-radius: 16px;
  transition: .2s ease;
}
.track:hover, .track.active {
  transform: translateY(-1px);
  border-color: rgba(16,185,129,.6);
  background: rgba(24,34,56,.96);
}
.play {
  width: 46px; height: 46px; padding: 0; border-radius: 50%;
}
.track-info { min-width: 0; display: grid; gap: 4px; }
.track-info strong, .track-info span {
  white-space: nowrap; overflow: hidden; text-overflow: ellipsis;
}
.track-info span, .track-size { color: var(--muted); font-size: 14px; }
.icon-button {
  width: 38px; height: 38px; padding: 0; border-radius: 10px;
  background: transparent; border: 1px solid var(--border);
}
.danger { color: #fecaca; }
.empty { text-align: center; padding: 70px 20px; }
.empty-icon { font-size: 64px; opacity: .8; }

.player-shell {
  position: fixed;
  left: 50%;
  bottom: 16px;
  transform: translateX(-50%);
  width: min(920px, calc(100% - 24px));
  padding: 14px 16px;
  border: 1px solid var(--border);
  border-radius: 18px;
  background: rgba(18,26,46,.96);
  backdrop-filter: blur(18px);
  box-shadow: 0 18px 60px rgba(0,0,0,.4);
}
.player-shell audio { width: 100%; margin-top: 10px; }
.now-playing { display: grid; gap: 2px; }
.now-playing span { color: var(--muted); font-size: 13px; }

.login-page { display: grid; place-items: center; padding: 20px; }
.login-card {
  width: min(420px, 100%);
  padding: 32px;
  background: rgba(18,26,46,.94);
  border: 1px solid var(--border);
  border-radius: 24px;
  box-shadow: 0 24px 80px rgba(0,0,0,.35);
}
.login-card h1 { margin: 8px 0 4px; }
.logo { font-size: 46px; }
label { display: block; margin: 16px 0 8px; color: #cbd5e1; }
input {
  width: 100%;
  padding: 13px 14px;
  border: 1px solid var(--border);
  border-radius: 12px;
  color: white;
  background: #0f172a;
  outline: none;
}
input:focus { border-color: var(--accent-2); }
.login-card button, .upload-form > button { width: 100%; margin-top: 18px; }
.alert, .success {
  border-radius: 12px; padding: 12px 14px; margin: 16px 0;
}
.alert { background: rgba(239,68,68,.12); border: 1px solid rgba(239,68,68,.35); }
.success { background: rgba(34,197,94,.12); border: 1px solid rgba(34,197,94,.35); }

dialog {
  width: min(500px, calc(100% - 24px));
  border: 1px solid var(--border);
  border-radius: 20px;
  color: var(--text);
  background: var(--card);
  padding: 0;
}
dialog::backdrop { background: rgba(0,0,0,.72); backdrop-filter: blur(6px); }
.upload-form { padding: 22px; }
.dialog-head { display: flex; align-items: center; justify-content: space-between; }
.dialog-head h2 { margin: 0; }

@media (max-width: 620px) {
  .topbar { align-items: flex-start; padding: 14px; }
  .top-actions { gap: 6px; }
  .top-actions button, .top-actions .button { padding: 10px 12px; }
  .track { grid-template-columns: auto 1fr auto; }
  .track-size { display: none; }
}