/* === CarPlay Web Player — Dark, Simple & Cool === */
:root {
  --bg: #0c0d10;
  --bg-elev: #15171c;
  --text: #e8eaed;
  --muted: #9aa0a6;
  --border: #24272f;
  --accent: #6aa0ff;       /* さりげない青アクセント */
  --accent-press: #4f86e5;
  --shadow: 0 10px 30px rgba(0, 0, 0, .35);
  --radius: 14px;
}

@media (prefers-color-scheme: dark) {
  :root { color-scheme: dark; }
}

* { box-sizing: border-box; }

html, body {
  height: 100%;
  margin: 0;
}

body {
  font: 16px/1.5 system-ui, -apple-system, Segoe UI, Roboto, "Helvetica Neue", Arial, "Noto Sans JP", sans-serif;
  letter-spacing: .01em;
  background:
    radial-gradient(1200px 600px at 20% -10%, #151925 0%, rgba(21,25,37,0) 60%),
    radial-gradient(1000px 600px at 110% 30%, #121520 0%, rgba(18,21,32,0) 60%),
    var(--bg);
  color: var(--text);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  padding: max(16px, env(safe-area-inset-top)) max(16px, env(safe-area-inset-right)) max(24px, env(safe-area-inset-bottom)) max(16px, env(safe-area-inset-left));
  display: grid;
  place-items: start center;
}

/* レイアウト幅 */
body > * {
  width: 100%;
  max-width: 760px;
}

/* タイトル */
h1 {
  margin: 4px 0 16px;
  font-size: clamp(20px, 3.5vw, 28px);
  font-weight: 700;
  letter-spacing: .02em;
  color: var(--text);
  text-shadow: 0 1px 0 rgba(0,0,0,.2);
}

/* 仕切り線 */
hr {
  border: none;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--border), transparent);
  margin: 20px 0;
}

/* 行ブロック */
.row {
  display: flex;
  align-items: center;
  gap: 14px;
  background: linear-gradient(180deg, rgba(255,255,255,.02), rgba(255,255,255,.0));
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 12px 14px;
  box-shadow: var(--shadow);
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
  margin: 10px 0;
}

/* アートワーク */
#art {
  width: clamp(72px, 20vw, 120px);
  height: clamp(72px, 20vw, 120px);
  object-fit: cover;
  border-radius: 12px;
  background: #0f1116;
  border: 1px solid var(--border);
  box-shadow: 0 6px 20px rgba(0,0,0,.4);
  user-select: none;
}

/* タイトル／アーティスト */
#title {
  font-weight: 700;
  font-size: clamp(16px, 2.8vw, 20px);
  line-height: 1.3;
}

#artist {
  margin-top: 4px;
  color: var(--muted);
  font-size: 14px;
}

/* プレーヤー操作 */
button {
  appearance: none;
  border: 1px solid var(--border);
  background: linear-gradient(180deg, #1a1d24, #12141a);
  color: var(--text);
  padding: 10px 14px;
  border-radius: 12px;
  font-weight: 600;
  letter-spacing: .02em;
  cursor: pointer;
  min-width: 88px;
  box-shadow: 0 6px 18px rgba(0,0,0,.35);
  transition: transform .12s ease, box-shadow .12s ease, border-color .12s ease, background .12s ease;
  -webkit-tap-highlight-color: transparent;
}

button:hover {
  transform: translateY(-1px);
  box-shadow: 0 10px 24px rgba(0,0,0,.4);
  border-color: #2d3340;
}

button:active {
  transform: translateY(0);
  background: linear-gradient(180deg, #141821, #0f1217);
  border-color: #2a3040;
}

button:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

button#play {
  background: linear-gradient(180deg, #203150, #172438);
  border-color: #27344d;
}
button#play:hover { border-color: #314262; }
button#play:active { background: linear-gradient(180deg, #1b2a44, #121e31); }

button#pause {
  background: linear-gradient(180deg, #29272b, #18171a);
}

button#prev, button#next {
  min-width: 70px;
}

/* 時刻表示 */
#time {
  margin-left: auto;
  font-variant-numeric: tabular-nums;
  color: var(--muted);
  padding: 8px 10px;
  border-radius: 10px;
  border: 1px solid var(--border);
  background: #0f1116;
}

/* リンク */
a {
  color: var(--accent);
  text-decoration: none;
  border-bottom: 1px dashed rgba(106,160,255,.35);
}
a:hover { border-bottom-style: solid; }
a:active { color: var(--accent-press); }

/* iOS: ユーザー操作以外のaudio UIは隠す */
audio#player { display: none; }

/* 小さめ端末最適化 */
@media (max-width: 420px) {
  .row { padding: 10px 12px; gap: 10px; }
  button { padding: 9px 12px; min-width: 0; }
  #time { padding: 6px 8px; }
}

/* 低モーション環境 */
@media (prefers-reduced-motion: reduce) {
  * { transition: none !important; }
}