:root {
  color-scheme: light;
  --bg: #f4f6fb;
  --card: #ffffff;
  --text: #162036;
  --muted: #556179;
  --accent: #1f6feb;
  --accent-2: #0ea5e9;
  --border: #dce3f0;
  --shadow: 0 10px 30px rgba(20, 35, 70, 0.12);
}

* { box-sizing: border-box; }
html, body { height: 100%; }
body {
  margin: 0;
  font-family: "Manrope", "Noto Sans JP", system-ui, sans-serif;
  color: var(--text);
  background:
    radial-gradient(circle at 20% 10%, #e8f1ff, transparent 45%),
    radial-gradient(circle at 80% 0%, #e7fff7, transparent 40%),
    var(--bg);
}

.container {
  max-width: 920px;
  margin: 0 auto;
  padding: 28px 18px 48px;
}

.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 22px 20px;
  box-shadow: var(--shadow);
}

.h1 {
  font-size: 22px;
  margin: 0 0 10px;
}

.p {
  margin: 0 0 10px;
  color: var(--muted);
}

.small {
  font-size: 12px;
  color: var(--muted);
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  padding: 10px 14px;
  border-radius: 10px;
  border: 1px solid var(--border);
  background: #fff;
  color: var(--text);
  text-decoration: none;
  font-weight: 600;
  cursor: pointer;
}

.btn-primary {
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  color: #fff;
  border-color: transparent;
}

.list {
  margin-top: 18px;
  display: grid;
  gap: 12px;
}

.player {
  width: 100%;
  aspect-ratio: 16 / 9;
  border: none;
  border-radius: 12px;
  background: #000;
}

@media (max-width: 640px) {
  .container { padding: 20px 14px 36px; }
  .card { padding: 18px 16px; }
  .h1 { font-size: 20px; }
}