:root {
  color-scheme: dark;
  --bg: #0c1018;
  --panel: #151b28;
  --text: #e8ecf4;
  --muted: #8b95a8;
  --accent: #5b9dff;
  --accent-deep: #2f7ae5;
  --border: #2a3344;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: system-ui, -apple-system, "Segoe UI", sans-serif;
  background: radial-gradient(circle at top, #1a2438 0%, var(--bg) 55%);
  color: var(--text);
}

.page-shell {
  max-width: 36rem;
  margin: 0 auto;
  padding: 2rem 1.25rem 3rem;
}

.page-header {
  margin-bottom: 1.5rem;
}

.track-title {
  margin: 0 0 0.35rem;
  font-size: 1.45rem;
  font-weight: 700;
}

.track-meta {
  margin: 0;
  color: var(--muted);
  font-size: 0.88rem;
}

.player-wrapper {
  padding: 1.1rem;
  border: 1px solid var(--border);
  border-radius: 12px;
  background: color-mix(in srgb, var(--panel) 92%, black);
  box-shadow: 0 12px 40px rgba(0, 0, 0, 0.28);
}

.control-btn {
  appearance: none;
  border: 1px solid color-mix(in srgb, var(--accent) 45%, var(--border));
  border-radius: 999px;
  background: linear-gradient(
    180deg,
    color-mix(in srgb, var(--accent) 22%, var(--panel)),
    color-mix(in srgb, var(--accent-deep) 18%, var(--panel))
  );
  color: var(--text);
  font: inherit;
  font-weight: 600;
  padding: 0.55rem 1.35rem;
  cursor: pointer;
}

.control-btn:hover {
  border-color: var(--accent);
}

.scrub-timeline {
  margin-top: 1rem;
  display: flex;
  flex-direction: column;
  gap: 0.45rem;
}

.scrub-track {
  height: 0.45rem;
  border-radius: 999px;
  background: color-mix(in srgb, var(--border) 80%, transparent);
  overflow: hidden;
}

.scrub-fill {
  height: 100%;
  width: 0%;
  border-radius: inherit;
  background: linear-gradient(90deg, var(--accent-deep), var(--accent));
  transition: width 0.15s linear;
}

.scrub-time {
  font-size: 0.78rem;
  color: var(--muted);
  font-variant-numeric: tabular-nums;
}