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

:root {
  --bg: #ffffff;
  --bg-soft: #f7f5f2;
  --panel: #ffffff;
  --panel-hover: #f0ece5;
  --accent: #006298;
  --accent-hover: #00547f;
  --accent-soft: #e6f0f6;
  --text: #1a1a1a;
  --text-soft: #4a4a4a;
  --text-dim: #767676;
  --border: #e0dcd4;
  --border-strong: #cfcabf;
  --shadow: 0 1px 3px rgba(0, 0, 0, 0.06), 0 1px 2px rgba(0, 0, 0, 0.04);
  --shadow-strong: 0 4px 12px rgba(0, 0, 0, 0.08);
}

html, body {
  height: 100%;
  background: var(--bg-soft);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Helvetica Neue", Arial, sans-serif;
  -webkit-font-smoothing: antialiased;
  line-height: 1.4;
}

.app {
  max-width: 980px;
  margin: 0 auto;
  padding: 24px 20px;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

header {
  text-align: center;
  margin-bottom: 28px;
  padding-bottom: 24px;
  border-bottom: 1px solid var(--border);
}

header h1 {
  font-family: Garamond, "EB Garamond", Georgia, "Times New Roman", serif;
  font-size: 34px;
  font-weight: 400;
  letter-spacing: 0.3px;
  color: var(--accent);
}

header .subtitle {
  font-size: 14px;
  color: var(--text-dim);
  margin-top: 6px;
  letter-spacing: 0.5px;
  text-transform: uppercase;
}

main {
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  gap: 20px;
  flex: 1;
}

@media (max-width: 720px) {
  main {
    grid-template-columns: 1fr;
  }
}

.song-list {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 8px;
  box-shadow: var(--shadow);
  overflow-y: auto;
  max-height: 70vh;
}

.song-item {
  display: block;
  width: 100%;
  text-align: left;
  background: transparent;
  color: var(--text);
  border: none;
  border-bottom: 1px solid var(--border);
  padding: 14px 16px;
  font-size: 15px;
  cursor: pointer;
  transition: background 0.15s, color 0.15s;
  font-family: inherit;
}

.song-item:last-child {
  border-bottom: none;
}

.song-item:hover {
  background: var(--bg-soft);
  color: var(--accent);
}

.song-item.active {
  background: var(--accent-soft);
  color: var(--accent);
  font-weight: 600;
  border-left: 3px solid var(--accent);
  padding-left: 13px;
}

.player {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 36px 24px;
  box-shadow: var(--shadow);
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 22px;
  min-height: 320px;
}

.now-playing {
  font-family: Garamond, "EB Garamond", Georgia, "Times New Roman", serif;
  font-size: 22px;
  font-weight: 400;
  text-align: center;
  color: var(--text);
  min-height: 32px;
  padding: 0 12px;
}

.controls {
  display: flex;
  align-items: center;
  justify-content: center;
}

.play-btn {
  width: 84px;
  height: 84px;
  border-radius: 50%;
  background: var(--accent);
  color: #ffffff;
  border: none;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background 0.15s, transform 0.1s, box-shadow 0.15s;
  box-shadow: 0 2px 8px rgba(0, 98, 152, 0.2);
}

.play-btn:hover:not(:disabled) {
  background: var(--accent-hover);
  box-shadow: 0 4px 12px rgba(0, 98, 152, 0.3);
}

.play-btn:active:not(:disabled) {
  transform: scale(0.97);
}

.play-btn:disabled {
  background: var(--border-strong);
  color: var(--text-dim);
  cursor: not-allowed;
  box-shadow: none;
}

.play-btn svg {
  margin-left: 4px;
}

#pauseIcon {
  margin-left: 0;
}

.seek-row {
  width: 100%;
  display: flex;
  align-items: center;
  gap: 12px;
}

.time {
  font-size: 13px;
  color: var(--text-soft);
  font-variant-numeric: tabular-nums;
  min-width: 44px;
  text-align: center;
}

#seekBar {
  flex: 1;
  -webkit-appearance: none;
  appearance: none;
  background: transparent;
  height: 24px;
  cursor: pointer;
}

#seekBar::-webkit-slider-runnable-track {
  height: 4px;
  background: var(--border);
  border-radius: 2px;
}

#seekBar::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: var(--accent);
  margin-top: -6px;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.2);
}

#seekBar::-moz-range-track {
  height: 4px;
  background: var(--border);
  border-radius: 2px;
}

#seekBar::-moz-range-thumb {
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: var(--accent);
  border: none;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.2);
}

#seekBar:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.extras {
  display: flex;
  gap: 14px;
  align-items: center;
}

.extra-btn {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: transparent;
  color: var(--text-soft);
  border: 1px solid var(--border);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background 0.15s, color 0.15s, border-color 0.15s;
}

.extra-btn:hover:not(:disabled) {
  background: var(--accent-soft);
  color: var(--accent);
  border-color: var(--accent);
}

.extra-btn:disabled {
  opacity: 0.4;
  cursor: not-allowed;
}

.playlist-controls {
  display: flex;
  gap: 10px;
  align-items: center;
  margin-top: 4px;
  padding-top: 18px;
  border-top: 1px solid var(--border);
  width: 100%;
  justify-content: center;
}

.playlist-btn {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 8px 16px;
  border-radius: 3px;
  background: var(--panel);
  color: var(--text-soft);
  border: 1px solid var(--border-strong);
  cursor: pointer;
  font-size: 14px;
  font-family: inherit;
  font-weight: 500;
  transition: background 0.15s, color 0.15s, border-color 0.15s;
}

.playlist-btn:hover {
  background: var(--accent-soft);
  color: var(--accent);
  border-color: var(--accent);
}

.playlist-btn.active {
  background: var(--accent);
  color: #ffffff;
  border-color: var(--accent);
}

.playlist-btn.active:hover {
  background: var(--accent-hover);
  border-color: var(--accent-hover);
}