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

:root {
  /* Backgrounds */
  --bg-primary: #242424;
  --bg-secondary: #1a1a1a;
  --bg-hover: #2a2a2a;

  /* Text */
  --text-primary: #e8e8e8;
  --text-secondary: #b8b8b8;

  /* Accents */
  --accent-color: #1976d2;
  --accent-hover: #64b5f6;

  /* Borders */
  --border-color: #3a3a3a;

  /* Status */
  --error-color: #c62828;
  --warning-color: #ffb74d;
  --success-color: #2e7d32;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  line-height: 1.5;
  color: var(--text-primary);
  background-color: var(--bg-primary);
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 1rem;
}

header {
  text-align: center;
  padding: 2rem 0;
  border-bottom: 1px solid var(--border-color);
  margin-bottom: 2rem;
}

h1 {
  font-size: 2rem;
  font-weight: 600;
}

#song-list {
  display: grid;
  gap: 1rem;
  margin-bottom: 2rem;
}

.song-card {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1rem;
  background-color: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  cursor: pointer;
  transition: background-color 0.2s;
}

.song-card:hover {
  background-color: var(--bg-hover);
}

.song-card.playing {
  background-color: var(--accent-color);
  color: #ffffff;
}

.song-card.playing.paused {
  background-color: #0d47a1;
  color: #ffffff;
}

.album-art {
  width: 80px;
  height: 80px;
  border-radius: 8px;
  object-fit: cover;
  flex-shrink: 0;
}

.album-art-placeholder {
  width: 80px;
  height: 80px;
  background: var(--bg-hover);
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 2rem;
  flex-shrink: 0;
  color: var(--text-secondary);
}

.song-info {
  display: flex;
  flex-direction: column;
}

.song-title {
  font-weight: 600;
  margin-bottom: 0.25rem;
}

.song-artist {
  font-size: 0.875rem;
  color: var(--text-secondary);
  opacity: 0.8;
}

#player-controls {
  display: flex;
  justify-content: center;
  gap: 1rem;
  padding: 2rem 0;
  border-top: 1px solid var(--border-color);
  position: sticky;
  bottom: 0;
  z-index: 100;
  background-color: var(--bg-primary);
}

button {
  padding: 0.75rem 1.5rem;
  font-size: 1rem;
  font-weight: 500;
  background-color: var(--accent-color);
  color: #ffffff;
  border: none;
  border-radius: 4px;
  cursor: pointer;
  transition: background-color 0.2s;
  min-width: 44px;
  min-height: 44px;
}

button:hover {
  background-color: var(--accent-hover);
}

button:active {
  transform: scale(0.98);
}

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

.song-card:focus-visible {
  outline: 2px solid var(--accent-color);
  outline-offset: -2px;
}

.search-section {
  position: relative;
  margin: 1rem 0;
  padding: 0 1rem;
}

#search-input {
  width: 100%;
  padding: 0.75rem 2.5rem 0.75rem 0.75rem;
  border: 2px solid var(--border-color);
  border-radius: 8px;
  font-size: 1rem;
  background-color: var(--bg-primary);
  color: var(--text-primary);
  transition: border-color 0.2s;
}

#search-input:focus {
  outline: none;
  border-color: var(--accent-color);
}

#search-input::placeholder {
  color: var(--text-secondary);
}

.clear-btn {
  position: absolute;
  right: 1.5rem;
  top: 50%;
  transform: translateY(-50%);
  background: none;
  border: none;
  cursor: pointer;
  font-size: 1.2rem;
  color: var(--text-secondary);
  display: none;
  padding: 0.5rem;
}

.clear-btn.visible {
  display: block;
}

.loading-skeleton {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  padding: 1rem;
}

.skeleton-item {
  height: 80px;
  background: linear-gradient(
    90deg,
    var(--bg-primary) 25%,
    var(--bg-secondary) 50%,
    var(--bg-primary) 75%
  );
  background-size: 200% 100%;
  animation: loading 1.5s infinite;
  border-radius: 8px;
}

@keyframes loading {
  0% { background-position: 200% 0; }
  100% { background-position: -200% 0; }
}

.error-state {
  text-align: center;
  padding: 2rem;
}

.error-state p {
  color: var(--error-color);
  margin-bottom: 1rem;
}

.error-state button {
  padding: 0.75rem 1.5rem;
  background-color: var(--accent-color);
  color: #ffffff;
  border: none;
  border-radius: 4px;
  cursor: pointer;
}

.no-results {
  text-align: center;
  padding: 2rem;
  color: var(--text-secondary);
}

[hidden] {
  display: none;
}

.offline-indicator {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  background-color: var(--warning-color);
  color: #ffffff;
  text-align: center;
  padding: 0.5rem;
  font-weight: 500;
  z-index: 1000;
}

.update-banner {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  background-color: var(--success-color);
  color: #ffffff;
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 1rem;
  padding: 0.75rem;
  z-index: 1000;
}

.refresh-btn {
  background-color: #1b5e20;
  color: #ffffff;
  padding: 0.5rem 1rem;
  font-size: 0.875rem;
  min-width: auto;
  min-height: auto;
}

.refresh-btn:hover {
  background-color: #2e7d32;
}

.cache-indicator {
  font-size: 1.2rem;
  color: var(--text-secondary);
  opacity: 0.5;
  transition: opacity 0.2s;
}

.cache-indicator.cached {
  opacity: 1;
}

.storage-info {
  padding: 1rem;
  background-color: var(--bg-secondary);
  border-radius: 8px;
  margin-bottom: 1rem;
}

.storage-info p {
  font-size: 0.875rem;
  margin-bottom: 0.5rem;
}

.storage-bar {
  height: 8px;
  background-color: var(--bg-hover);
  border-radius: 4px;
  overflow: hidden;
}

.storage-used {
  height: 100%;
  background-color: var(--accent-color);
  transition: width 0.3s;
}

.storage-warning {
  background-color: var(--warning-color);
  color: #ffffff;
  padding: 0.75rem;
  border-radius: 4px;
  margin-bottom: 1rem;
  text-align: center;
}

.cache-management {
  display: flex;
  justify-content: center;
  padding: 1rem;
}

.clear-cache-btn {
  background-color: var(--error-color);
}

.clear-cache-btn:hover {
  background-color: #c62828;
}

@media (min-width: 768px) {
  #song-list {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 1024px) {
  #song-list {
    grid-template-columns: repeat(3, 1fr);
  }
}