*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

:root {
  --bg: #0a0a0f;
  --surface: #13131a;
  --border: #1e1e2e;
  --text: #e8e6f0;
  --text-muted: #6b6880;
  --accent: #c9b8f0;
  --accent-dim: #7b6aaa;
  --gold: #d4a96a;
}

body {
  background: var(--bg);
  color: var(--text);
  font-family: 'Georgia', 'Hiragino Mincho ProN', serif;
  min-height: 100dvh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 2rem;
}

#app {
  width: 100%;
  max-width: 480px;
  display: flex;
  flex-direction: column;
  gap: 3rem;
}

header {
  text-align: center;
}

h1 {
  font-size: 3rem;
  font-weight: normal;
  letter-spacing: 0.3em;
  color: var(--accent);
  text-transform: uppercase;
}

.subtitle {
  margin-top: 0.5rem;
  color: var(--text-muted);
  font-size: 0.85rem;
  letter-spacing: 0.2em;
}

#player {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 2px;
  padding: 2rem;
  display: flex;
  flex-direction: column;
  gap: 1.8rem;
}

#now-playing {
  text-align: center;
  min-height: 3.5rem;
}

#track-title {
  font-size: 1rem;
  color: var(--text);
  letter-spacing: 0.05em;
  line-height: 1.5;
}

#track-status {
  margin-top: 0.4rem;
  font-size: 0.75rem;
  color: var(--text-muted);
  letter-spacing: 0.15em;
}

#controls {
  display: flex;
  gap: 1rem;
  justify-content: center;
}

button {
  font-family: inherit;
  cursor: pointer;
  border: none;
  border-radius: 1px;
  padding: 0.7rem 1.8rem;
  letter-spacing: 0.1em;
  font-size: 0.85rem;
  transition: opacity 0.2s;
}

button:disabled {
  opacity: 0.3;
  cursor: default;
}

.btn-primary {
  background: var(--accent-dim);
  color: #fff;
}

.btn-primary:hover:not(:disabled) {
  opacity: 0.85;
}

.btn-secondary {
  background: transparent;
  color: var(--text-muted);
  border: 1px solid var(--border);
}

.btn-secondary:hover:not(:disabled) {
  color: var(--text);
  border-color: var(--accent-dim);
}

#progress-wrap {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

#progress-bar {
  width: 100%;
  height: 2px;
  background: var(--border);
  border-radius: 1px;
  overflow: hidden;
}

#progress-fill {
  height: 100%;
  width: 0%;
  background: var(--accent);
  transition: width 0.5s linear;
}

#time-display {
  display: flex;
  justify-content: space-between;
  font-size: 0.7rem;
  color: var(--text-muted);
  letter-spacing: 0.05em;
}

#volume-wrap {
  display: flex;
  align-items: center;
  gap: 1rem;
  font-size: 0.75rem;
  color: var(--text-muted);
  letter-spacing: 0.1em;
}

#volume {
  flex: 1;
  accent-color: var(--accent-dim);
  cursor: pointer;
}

footer {
  text-align: center;
  font-size: 0.75rem;
  color: var(--text-muted);
  letter-spacing: 0.15em;
}