* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
}

:root {
  --bg-main: #121212;
  --bg-surface: #181818;
  --bg-surface-hover: #282828;
  --bg-sidebar: #050505;
  --primary: #1db954;
  --primary-hover: #1ed760;
  --danger: #e91e63;
  --text-main: #ffffff;
  --text-muted: #a7a7a7;
  --border-color: #2c2c2c;
  --player-height: 86px;
}

body {
  background-color: var(--bg-main);
  color: var(--text-main);
  overflow: hidden;
  height: 100vh;
}

.hidden {
  display: none !important;
}

.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.85);
  backdrop-filter: blur(8px);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1000;
}

.modal-card {
  background: #222;
  border-radius: 12px;
  padding: 24px;
  width: 90%;
  max-width: 440px;
  box-shadow: 0 16px 32px rgba(0, 0, 0, 0.5);
  border: 1px solid var(--border-color);
}

.modal-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 16px;
}

.modal-body {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.modal-footer {
  margin-top: 20px;
  display: flex;
  justify-content: flex-end;
}

input[type="text"],
input[type="password"] {
  width: 100%;
  padding: 12px 14px;
  background: #121212;
  border: 1px solid var(--border-color);
  border-radius: 8px;
  color: #fff;
  font-size: 14px;
  outline: none;
  transition: border-color 0.2s;
}

input[type="text"]:focus,
input[type="password"]:focus {
  border-color: var(--primary);
}

.btn {
  padding: 10px 18px;
  border-radius: 20px;
  border: none;
  font-weight: 600;
  cursor: pointer;
  font-size: 14px;
  transition: transform 0.1s, background-color 0.2s;
  white-space: nowrap;
}

.btn:active {
  transform: scale(0.98);
}

.btn-primary {
  background-color: var(--primary);
  color: #000;
}

.btn-primary:hover {
  background-color: var(--primary-hover);
}

.btn-secondary {
  background-color: #333;
  color: #fff;
}

.btn-secondary:hover {
  background-color: #444;
}

.btn-danger {
  background-color: #4a151b;
  color: #ff6b6b;
}

.btn-danger:hover {
  background-color: #631d25;
}

.icon-btn {
  background: none;
  border: none;
  color: var(--text-muted);
  font-size: 20px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 4px;
  border-radius: 50%;
  transition: color 0.2s, background-color 0.2s;
}

.icon-btn:hover {
  color: #fff;
}

.icon-btn-small {
  background: none;
  border: none;
  color: var(--text-muted);
  font-size: 18px;
  cursor: pointer;
  padding: 4px;
}

.icon-btn-small:hover {
  color: #fff;
}

.player-save-action {
  color: var(--primary);
  margin-left: 6px;
  font-size: 18px;
}

.player-save-action:hover {
  color: var(--primary-hover);
}

.subtitle {
  color: var(--text-muted);
  font-size: 13px;
  margin-top: 4px;
}

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

.error-msg {
  color: #ff5252;
  font-size: 13px;
  min-height: 18px;
}

.success-msg {
  color: #4caf50;
  font-size: 13px;
}

.divider {
  border: none;
  border-top: 1px solid var(--border-color);
  margin: 12px 0;
}

.mobile-nav {
  display: none;
}

.app-layout {
  display: grid;
  grid-template-columns: 240px 1fr;
  grid-template-rows: 1fr var(--player-height);
  height: 100vh;
}

.sidebar {
  background-color: var(--bg-sidebar);
  display: flex;
  flex-direction: column;
  padding: 20px 16px;
  border-right: 1px solid var(--border-color);
  user-select: none;
}

.nav-menu {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin-bottom: 24px;
}

.nav-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 10px 12px;
  border: none;
  border-radius: 8px;
  background: transparent;
  color: var(--text-muted);
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  text-align: left;
  transition: background-color 0.2s, color 0.2s;
}

.nav-item:hover, .nav-item.active {
  background-color: var(--bg-surface-hover);
  color: #fff;
}

.playlist-section {
  flex: 1;
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

.playlist-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 11px;
  font-weight: 700;
  color: var(--text-muted);
  letter-spacing: 1px;
  margin-bottom: 12px;
  padding: 0 4px;
}

.playlist-list {
  list-style: none;
  overflow-y: auto;
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.playlist-list-item {
  padding: 8px 12px;
  border-radius: 6px;
  color: var(--text-muted);
  cursor: pointer;
  font-size: 14px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  transition: background-color 0.2s, color 0.2s;
}

.playlist-list-item:hover,
.playlist-list-item.active {
  background-color: var(--bg-surface-hover);
  color: #fff;
}

.sidebar-footer {
  display: flex;
  justify-content: space-between;
  padding-top: 16px;
  border-top: 1px solid var(--border-color);
}

.btn-text {
  background: none;
  border: none;
  color: var(--text-muted);
  cursor: pointer;
  font-size: 13px;
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 6px 8px;
  border-radius: 6px;
}

.btn-text:hover {
  color: #fff;
  background-color: var(--bg-surface-hover);
}

.main-content {
  background-color: var(--bg-main);
  overflow-y: auto;
  padding: 24px 32px;
  position: relative;
}

.view-panel {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.search-bar-container {
  display: flex;
  gap: 12px;
  max-width: 680px;
  width: 100%;
}

.status-msg {
  font-size: 14px;
  color: var(--text-muted);
}

.section-heading {
  margin-top: 24px;
  margin-bottom: 8px;
  border-top: 1px solid var(--border-color);
  padding-top: 20px;
}

.section-heading h3 {
  font-size: 18px;
  font-weight: 700;
  color: #fff;
}

.results-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 16px;
}

.media-card {
  background-color: var(--bg-surface);
  border-radius: 8px;
  padding: 12px;
  cursor: pointer;
  transition: background-color 0.2s, transform 0.2s;
  display: flex;
  flex-direction: column;
  position: relative;
}

.media-card:hover {
  background-color: var(--bg-surface-hover);
  transform: translateY(-2px);
}

.media-thumb-wrapper {
  position: relative;
  width: 100%;
  aspect-ratio: 16 / 9;
  border-radius: 6px;
  overflow: hidden;
  background-color: #000;
  margin-bottom: 10px;
}

.media-thumb-wrapper img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.card-actions {
  position: absolute;
  top: 8px;
  right: 8px;
  opacity: 0;
  transition: opacity 0.2s;
  background: rgba(0, 0, 0, 0.7);
  border-radius: 50%;
  width: 32px;
  height: 32px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
}

.media-card:hover .card-actions {
  opacity: 1;
}

.media-title {
  font-size: 14px;
  font-weight: 600;
  color: #fff;
  line-height: 1.3;
  margin-bottom: 4px;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.media-channel {
  font-size: 12px;
  color: var(--text-muted);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.load-more-container {
  display: flex;
  justify-content: center;
  padding: 20px 0;
}

.playlist-detail-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--border-color);
}

.playlist-detail-header h2 {
  font-size: 28px;
  font-weight: 700;
}

.playlist-actions {
  display: flex;
  gap: 10px;
}

.tracks-list {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.track-row {
  display: grid;
  grid-template-columns: 48px 1fr auto;
  align-items: center;
  gap: 16px;
  padding: 8px 12px;
  border-radius: 6px;
  cursor: pointer;
  transition: background-color 0.2s;
}

.track-row:hover {
  background-color: var(--bg-surface-hover);
}

.track-row-thumb {
  width: 48px;
  height: 36px;
  object-fit: cover;
  border-radius: 4px;
}

.track-row-info {
  overflow: hidden;
}

.track-row-title {
  font-size: 14px;
  font-weight: 600;
  color: #fff;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.track-row-channel {
  font-size: 12px;
  color: var(--text-muted);
}

.track-row-actions {
  display: flex;
  align-items: center;
  gap: 8px;
}

.playlist-select-list {
  max-height: 200px;
  overflow-y: auto;
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.playlist-select-item {
  padding: 10px 14px;
  background: var(--bg-surface);
  border-radius: 6px;
  cursor: pointer;
  transition: background-color 0.2s;
  font-size: 14px;
}

.playlist-select-item:hover {
  background: var(--primary);
  color: #000;
  font-weight: 600;
}

.new-playlist-inline {
  display: flex;
  gap: 8px;
  margin-top: 10px;
}

.player-bar {
  grid-column: 1 / -1;
  background-color: var(--bg-surface);
  border-top: 1px solid var(--border-color);
  display: grid;
  grid-template-columns: 300px 1fr 240px;
  align-items: center;
  padding: 0 20px;
  user-select: none;
  z-index: 100;
}

.hidden-player {
  position: fixed;
  bottom: 96px;
  right: 20px;
  width: 320px;
  height: 180px;
  border-radius: 8px;
  overflow: hidden;
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.7);
  background: #000;
  border: 1px solid var(--border-color);
  z-index: 900;
  transition: opacity 0.2s, transform 0.2s;
}

.hidden-player.audio-only {
  width: 1px;
  height: 1px;
  opacity: 0.01;
  pointer-events: none;
  transform: translateY(20px);
}

.track-info {
  display: flex;
  align-items: center;
  gap: 12px;
  min-width: 0;
}

#player-track-thumb {
  width: 48px;
  height: 48px;
  border-radius: 4px;
  object-fit: cover;
  flex-shrink: 0;
}

.track-text {
  min-width: 0;
}

.track-text .title {
  font-size: 13px;
  font-weight: 600;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.track-text .subtitle {
  font-size: 12px;
  color: var(--text-muted);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.player-controls {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
  max-width: 500px;
  margin: 0 auto;
  width: 100%;
}

.control-buttons {
  display: flex;
  align-items: center;
  gap: 16px;
}

.player-btn {
  background: none;
  border: none;
  color: var(--text-muted);
  font-size: 18px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
}

.player-btn:hover {
  color: #fff;
}

.play-btn {
  background-color: #fff;
  color: #000;
  width: 36px;
  height: 36px;
  border-radius: 50%;
  font-size: 14px;
}

.play-btn:hover {
  transform: scale(1.06);
  background-color: #fff;
  color: #000;
}

.progress-container {
  width: 100%;
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 11px;
  color: var(--text-muted);
}

input[type="range"] {
  flex: 1;
  accent-color: var(--primary);
  cursor: pointer;
  height: 4px;
}

.extra-controls {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 10px;
}

.vol-icon {
  font-size: 16px;
  color: var(--text-muted);
}

#volume-bar {
  width: 90px;
}

/* Mobile & Tablet Responsiveness */
@media (max-width: 768px) {
  :root {
    --player-height: 116px;
  }

  .app-layout {
    display: flex;
    flex-direction: column;
    height: 100vh;
  }

  .sidebar {
    display: none;
  }

  .mobile-nav {
    display: flex;
    justify-content: space-around;
    align-items: center;
    padding: 10px 8px;
    background-color: var(--bg-sidebar);
    border-bottom: 1px solid var(--border-color);
  }

  .mobile-actions {
    display: flex;
    justify-content: space-around;
    width: 100%;
    gap: 4px;
  }

  .mobile-actions .btn-text {
    font-size: 12px;
    padding: 6px 4px;
  }

  .main-content {
    flex: 1;
    padding: 16px;
    overflow-y: auto;
    margin-bottom: var(--player-height);
  }

  .card-actions {
    opacity: 1;
  }

  .search-bar-container {
    flex-direction: row;
    gap: 8px;
  }

  .search-bar-container input {
    flex: 1;
  }

  .results-grid {
    grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
    gap: 12px;
  }

  .player-bar {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    height: var(--player-height);
    display: flex;
    flex-direction: column;
    justify-content: center;
    gap: 8px;
    padding: 8px 14px;
  }

  .track-info {
    width: 100%;
    justify-content: space-between;
  }

  .track-text {
    flex: 1;
    margin: 0 8px;
  }

  .player-controls {
    width: 100%;
    gap: 4px;
  }

  .control-buttons {
    gap: 20px;
  }

  .progress-container {
    width: 100%;
  }

  .extra-controls {
    display: none;
  }
}