:root {
  --color-bg-primary: #000000;
  --color-bg-secondary: #121212;
  --color-bg-elevated: #181818; 
  --color-bg-hover: #282828;    
  --color-bg-active: #333333;
  --color-bg-context: #282828;
  
  --color-accent: #1db954;
  --color-accent-hover: #1ed760;
  --color-accent-active: #169c46;
  
  --color-text-primary: #ffffff;
  --color-text-secondary: #b3b3b3;
  --color-text-muted: #6a6a6a;
  
  --color-border: rgba(255, 255, 255, 0.1);
  --color-divider: rgba(255, 255, 255, 0.05);
  
  --space-xs: 4px;
  --space-sm: 8px;
  --space-md: 16px;
  --space-lg: 24px;
  --space-xl: 32px;
  --space-2xl: 48px;
  
  --radius-sm: 4px;
  --radius-md: 4px; 
  --radius-lg: 8px;
  --radius-xl: 12px;
  --radius-full: 9999px;
  
  --shadow-sm: 0 4px 10px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 8px 24px rgba(0, 0, 0, 0.5);
  --shadow-lg: 0 12px 40px rgba(0, 0, 0, 0.7);

  --transition-fast: 0.1s cubic-bezier(0.3, 0, 0, 1);
  --transition-normal: 0.2s cubic-bezier(0.3, 0, 0, 1);
  --transition-slow: 0.3s cubic-bezier(0.3, 0, 0, 1);
  
  --sidebar-width: 240px;
  --player-height: 90px;
  --mobile-nav-height: 64px;
}

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

html {
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: 'Quicksand', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  background: var(--color-bg-primary);
  color: var(--color-text-primary);
  overflow: hidden;
  height: 100vh;
}

button {
  font-family: inherit;
  cursor: pointer;
  border: none;
  background: none;
  color: inherit;
}

input {
  font-family: inherit;
}

img {
  display: block;
  max-width: 100%;
}

.app {
  display: grid;
  grid-template-columns: var(--sidebar-width) 1fr;
  grid-template-rows: 1fr var(--player-height);
  height: 100vh;
  gap: var(--space-sm);
  padding: var(--space-sm);
  background: var(--color-bg-primary);
}

.sidebar {
  grid-row: 1 / 3;
  background: var(--color-bg-secondary);
  border-radius: var(--radius-lg);
  display: flex;
  flex-direction: column;
  overflow: hidden;
  transition: transform var(--transition-normal);
}

.sidebar-content {
  padding: var(--space-lg);
  display: flex;
  flex-direction: column;
  gap: var(--space-lg);
  overflow-y: auto;
  flex: 1;
}

.sidebar-content::-webkit-scrollbar {
  width: 8px;
}

.sidebar-content::-webkit-scrollbar-thumb {
  background: var(--color-bg-elevated);
  border-radius: var(--radius-full);
}

.logo {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--color-text-primary);
  margin-bottom: var(--space-md);
}

.logo svg {
  color: var(--color-accent);
}

.nav-menu {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
}

.nav-item {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  padding: var(--space-md);
  border-radius: var(--radius-md);
  color: var(--color-text-secondary);
  font-weight: 600;
  transition: background-color var(--transition-fast), color var(--transition-fast);
  position: relative;
  overflow: hidden;
}

.nav-item svg {
  width: 24px;
  height: 24px;
  flex-shrink: 0;
}

.nav-item:hover {
  color: var(--color-text-primary);
  background: var(--color-bg-hover);
}

.nav-item.active {
  color: var(--color-text-primary);
  background: var(--color-bg-active);
}

.playlist-section {
  margin-top: var(--space-xl);
}

.playlist-section h3 {
  font-size: 0.875rem;
  font-weight: 700;
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: var(--space-md);
}

.create-playlist-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-md);
  width: 100%;
  padding: var(--space-md);
  color: var(--color-text-secondary);
  font-weight: 600;
  border-radius: var(--radius-md);
  transition: background-color var(--transition-fast), color var(--transition-fast);
  background: rgba(255, 255, 255, 0.05);
  margin-bottom: 12px; 
}

.create-playlist-btn:hover {
  color: var(--color-text-primary);
  background: var(--color-bg-hover);
}

.create-playlist-btn svg {
  width: 20px;
  height: 20px;
}

.playlists-list {
    margin-top: 2px;
}

.playlist-item {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  padding: var(--space-sm) var(--space-md);
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: background-color var(--transition-fast);
  margin-bottom: var(--space-xs);
}

.playlist-item:hover {
  background: var(--color-bg-hover);
}

.playlist-item-cover {
  width: 40px;
  height: 40px;
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.playlist-item-cover svg {
  width: 20px;
  height: 20px;
  opacity: 0.8;
}

.playlist-item-text {
  min-width: 0;
  flex: 1;
}

.playlist-item-name {
  color: var(--color-text-primary);
  font-size: 0.9rem;
  font-weight: 600;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.playlist-item-count {
  color: var(--color-text-secondary);
  font-size: 0.75rem;
  margin-top: 2px;
}

.main-content {
  background: var(--color-bg-secondary);
  border-radius: var(--radius-lg);
  overflow: hidden;
  display: flex;
  flex-direction: column;
}

.top-header {
  background: linear-gradient(to bottom, rgba(0,0,0,0.6), transparent);
  padding: var(--space-lg);
  position: sticky;
  top: 0;
  z-index: 10;
  backdrop-filter: blur(10px);
}

.header-content {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  max-width: 1400px;
}

.nav-back {
  width: 40px;
  height: 40px;
  background: rgba(0, 0, 0, 0.7);
  border-radius: var(--radius-full);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-text-primary);
  transition: transform var(--transition-fast), background-color var(--transition-fast);
}

.nav-back:hover {
  background: rgba(0, 0, 0, 0.9);
  transform: scale(1.04);
}

.search-container {
  position: relative;
  flex: 1;
  max-width: 500px;
}

.search-icon {
  position: absolute;
  left: var(--space-md);
  top: 50%;
  transform: translateY(-50%);
  width: 20px;
  height: 20px;
  color: var(--color-text-muted);
  pointer-events: none;
}

.search-container input {
  width: 100%;
  padding: var(--space-md) var(--space-lg) var(--space-md) 48px;
  background: var(--color-bg-elevated);
  border: none;
  border-radius: var(--radius-full);
  color: var(--color-text-primary);
  font-size: 0.875rem;
  outline: none;
  transition: background-color var(--transition-fast), box-shadow var(--transition-fast);
}

.search-container input:focus {
  background: var(--color-bg-hover);
  box-shadow: 0 0 0 2px var(--color-accent);
}

.search-container input::placeholder {
  color: var(--color-text-muted);
}

.content-scroll {
  flex: 1;
  overflow-y: auto;
  overflow-x: hidden;
  padding: 0 var(--space-lg) var(--space-2xl);
}

.content-scroll::-webkit-scrollbar {
  width: 12px;
}

.content-scroll::-webkit-scrollbar-thumb {
  background: var(--color-bg-elevated);
  border-radius: var(--radius-full);
  border: 3px solid var(--color-bg-secondary);
}

.content-scroll::-webkit-scrollbar-thumb:hover {
  background: var(--color-bg-active);
}

.view {
  display: none;
  animation: fadeIn var(--transition-normal);
}

.view.active {
  display: block;
}

@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

.section-heading {
  font-size: 2rem;
  font-weight: 700;
  margin-bottom: var(--space-lg);
}

.content-section {
  margin-bottom: var(--space-2xl);
  animation: fadeIn var(--transition-normal);
}

.section-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: var(--space-lg);
}

.section-title {
  font-size: 1.5rem;
  font-weight: 700;
}

.see-all-btn {
  color: var(--color-text-secondary);
  font-weight: 600;
  font-size: 0.875rem;
  padding: var(--space-sm) var(--space-md);
  border-radius: var(--radius-md);
  transition: all var(--transition-fast);
}

.see-all-btn:hover {
  color: var(--color-text-primary);
  background: var(--color-bg-hover);
}

.empty-state {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: var(--space-xl) var(--space-md);
  text-align: center;
  min-height: 200px;
  color: var(--color-text-secondary);
  animation: fadeIn var(--transition-normal);
  grid-column: 1 / -1;
  width: 100%;
}

.empty-state svg {
  width: 48px;
  height: 48px;
  margin-bottom: var(--space-sm);
  opacity: 0.5;
  color: var(--color-text-muted);
}

.empty-state h3 {
  font-size: 1.1rem;
  font-weight: 700;
  margin-bottom: 4px;
  color: var(--color-text-primary);
}

.empty-state p {
  font-size: 0.85rem;
  color: var(--color-text-secondary);
  max-width: 250px;
  line-height: 1.4;
}

.hero-section {
  margin-bottom: var(--space-2xl);
}

.quick-picks {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: var(--space-md);
}

.quick-pick-card {
  background: var(--color-bg-elevated);
  border-radius: var(--radius-md);
  overflow: hidden;
  display: flex;
  align-items: center;
  gap: var(--space-md);
  cursor: pointer;
  transition: background-color var(--transition-fast);
  box-shadow: var(--shadow-sm);
  position: relative;
}

.quick-pick-card:hover {
  background: var(--color-bg-hover);
  box-shadow: var(--shadow-md);
}

.quick-pick-card img {
  width: 80px;
  height: 80px;
  object-fit: cover;
}

.quick-pick-card span {
  font-weight: 600;
  padding-right: var(--space-md);
}

.charts-grid {
  display: grid;
  gap: var(--space-sm);
}

.track-card {
  display: grid;
  grid-template-columns: auto 1fr auto auto;
  gap: var(--space-md);
  padding: var(--space-md);
  border-radius: var(--radius-md);
  align-items: center;
  cursor: pointer;
  transition: background-color var(--transition-fast);
  position: relative;
}

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

.track-card.playing {
  background: var(--color-bg-active);
}

.track-cover {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-sm);
  object-fit: cover;
  box-shadow: var(--shadow-sm);
}

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

.track-title {
  font-weight: 600;
  margin-bottom: var(--space-xs);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  font-size: 1rem;
}

.track-artist {
  color: var(--color-text-secondary);
  font-size: 0.875rem;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.track-duration {
  color: var(--color-text-secondary);
  font-size: 0.875rem;
}

.track-like {
  opacity: 0;
  transition: opacity var(--transition-fast);
}

.track-card:hover .track-like {
  opacity: 1;
}

.albums-carousel {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
  gap: var(--space-lg);
}

.albums-grid-layout {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
  gap: var(--space-lg);
}

.album-card {
  background: var(--color-bg-elevated);
  border-radius: var(--radius-lg);
  padding: var(--space-md);
  cursor: pointer;
  transition: background-color var(--transition-fast);
  position: relative;
}

.album-card:hover {
  background: var(--color-bg-hover);
  box-shadow: var(--shadow-md);
}

.album-cover {
  width: 100%;
  aspect-ratio: 1;
  border-radius: var(--radius-md);
  margin-bottom: var(--space-md);
  object-fit: cover;
  box-shadow: var(--shadow-md);
}

.album-title {
  font-weight: 700;
  margin-bottom: 4px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  font-size: 1rem;
}

.album-artist {
  color: var(--color-text-secondary);
  font-size: 0.875rem;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.create-new-card {
  background: linear-gradient(135deg, rgba(255,255,255,0.1), rgba(255,255,255,0.05));
  border: 1px dashed rgba(255,255,255,0.2);
  display: flex;
  align-items: center;
  justify-content: center;
}

.create-new-icon {
  width: 56px;
  height: 56px;
  background: #282828;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 16px;
  transition: transform var(--transition-fast), background-color var(--transition-fast);
  box-shadow: 0 4px 12px rgba(0,0,0,0.3);
}

.album-card:hover .create-new-icon {
  background: var(--color-accent);
  color: #000;
  transform: scale(1.02);
}

.detail-view {
  padding-top: var(--space-2xl);
}

.detail-header {
  display: flex;
  gap: var(--space-xl);
  margin-bottom: var(--space-xl);
  align-items: flex-end;
}

.detail-cover {
  width: 232px;
  height: 232px;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  object-fit: cover;
}

.detail-info {
  flex: 1;
  min-width: 0;
}

.detail-type {
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  color: var(--color-text-secondary);
  margin-bottom: var(--space-sm);
  display: block;
}

.detail-title {
  font-size: 3rem;
  font-weight: 900;
  margin-bottom: var(--space-md);
  line-height: 1.1;
}

.detail-artist {
  font-size: 1rem;
  font-weight: 600;
  color: var(--color-text-primary);
  margin-bottom: var(--space-sm);
}

.detail-meta {
  color: var(--color-text-secondary);
  font-size: 0.875rem;
}

.detail-actions {
  display: flex;
  gap: var(--space-md);
  align-items: center;
  margin-bottom: var(--space-xl);
}

.btn-primary {
  display: flex;
  align-items: center;
  justify-content: center; 
  gap: var(--space-sm);
  padding: var(--space-md) var(--space-xl);
  background: var(--color-accent);
  color: var(--color-bg-primary);
  font-weight: 700;
  border-radius: var(--radius-full);
  transition: transform var(--transition-fast), background-color var(--transition-fast);
  position: relative;
  overflow: hidden;
}

.btn-primary:hover {
  background: var(--color-accent-hover);
  transform: scale(1.02);
}

.btn-primary svg {
  width: 20px;
  height: 20px;
}

.btn-icon {
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-text-secondary);
  transition: transform var(--transition-fast), color var(--transition-fast);
  border-radius: var(--radius-full);
}

.btn-icon:hover {
  color: var(--color-text-primary);
  transform: scale(1.02);
  background: rgba(255, 255, 255, 0.1);
}

.btn-icon.liked {
  color: var(--color-accent);
}

.btn-icon svg {
  width: 24px;
  height: 24px;
}

.detail-tracks {
  margin-top: var(--space-xl);
}

.player-bar {
  background: var(--color-bg-secondary);
  border-radius: var(--radius-lg);
  padding: 0 var(--space-md);
  display: grid;
  grid-template-columns: 1fr 2fr 1fr;
  align-items: center;
  gap: var(--space-md);
  box-shadow: var(--shadow-lg);
}

.player-track-info {
  display: flex;
  gap: var(--space-md);
  align-items: center;
  min-width: 0;
}

.player-cover {
  width: 56px;
  height: 56px;
  border-radius: var(--radius-sm);
  object-fit: cover;
  box-shadow: var(--shadow-sm);
  flex-shrink: 0;
}

.player-text {
  min-width: 0;
  flex: 1;
}

.player-title {
  font-weight: 600;
  font-size: 0.875rem;
  margin-bottom: var(--space-xs);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.player-artist {
  color: var(--color-text-secondary);
  font-size: 0.75rem;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.btn-icon-small {
  width: 32px;
  height: 32px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-text-secondary);
  flex-shrink: 0;
  transition: transform var(--transition-fast), color var(--transition-fast);
}

.btn-icon-small:hover {
  color: var(--color-text-primary);
  transform: scale(1.02);
}

.btn-icon-small.liked {
  color: var(--color-accent);
}

.btn-icon-small svg {
  width: 16px;
  height: 16px;
}

.player-controls-center {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
}

.player-controls {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-md);
}

.player-btn {
  width: 32px;
  height: 32px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-text-secondary);
  transition: transform var(--transition-fast), color var(--transition-fast);
}

.player-btn:hover {
  color: var(--color-text-primary);
  transform: scale(1.02);
}

.player-btn svg {
  width: 16px;
  height: 16px;
}

.player-btn-play {
  width: 40px;
  height: 40px;
  background: var(--color-text-primary);
  color: var(--color-bg-primary);
  border-radius: var(--radius-full);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: transform var(--transition-fast), background-color var(--transition-fast);
}

.player-btn-play:hover {
  transform: scale(1.02);
  background: var(--color-accent-hover);
}

.player-btn-play svg {
  width: 20px;
  height: 20px;
  margin-left: 2px;
}

.player-progress {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
}

.time-text {
  font-size: 0.75rem;
  color: var(--color-text-secondary);
  min-width: 40px;
  text-align: center;
}

.progress-bar-container {
  flex: 1;
  height: 12px;
  position: relative;
  display: flex;
  align-items: center;
  cursor: pointer;
}

.progress-bar-bg {
  width: 100%;
  height: 4px;
  background: var(--color-bg-elevated);
  border-radius: var(--radius-full);
}

.progress-bar-fill {
  position: absolute;
  left: 0;
  height: 4px;
  background: var(--color-accent);
  border-radius: var(--radius-full);
  width: 0;
  pointer-events: none;
}

.progress-bar-handle {
  position: absolute;
  width: 12px;
  height: 12px;
  background: var(--color-text-primary);
  border-radius: var(--radius-full);
  left: 0;
  transform: translateX(-50%) scale(0);
  opacity: 0;
  transition: opacity var(--transition-fast), transform var(--transition-fast);
  pointer-events: none;
  box-shadow: var(--shadow-md);
  z-index: 5;
}

.progress-bar-container:hover .progress-bar-fill {
  background: var(--color-accent-hover);
}

.progress-bar-container:hover .progress-bar-handle {
  opacity: 1;
  transform: translateX(-50%) scale(1);
}

.player-volume {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  justify-content: flex-end;
}

.volume-bar-container {
  width: 100px;
  height: 12px;
  position: relative;
  display: flex;
  align-items: center;
  cursor: pointer;
}

.volume-bar-bg {
  width: 100%;
  height: 4px;
  background: var(--color-bg-elevated);
  border-radius: var(--radius-full);
}

.volume-bar-fill {
  position: absolute;
  left: 0;
  height: 4px;
  background: var(--color-text-primary);
  border-radius: var(--radius-full);
  width: 70%;
  pointer-events: none;
}

.volume-bar-handle {
  position: absolute;
  width: 12px;
  height: 12px;
  background: var(--color-text-primary);
  border-radius: var(--radius-full);
  left: 70%;
  transform: translateX(-50%) scale(0);
  opacity: 0;
  transition: opacity var(--transition-fast), transform var(--transition-fast);
  pointer-events: none;
  box-shadow: var(--shadow-md);
  z-index: 5;
}

.volume-bar-container:hover .volume-bar-handle {
  opacity: 1;
  transform: translateX(-50%) scale(1);
}

@keyframes shimmer {
  0% { background-position: -500px 0; }
  100% { background-position: 500px 0; }
}

.skeleton-card,
.skeleton-track,
.skeleton-album {
  background: linear-gradient(
    90deg,
    var(--color-bg-elevated) 0%,
    var(--color-bg-hover) 50%,
    var(--color-bg-elevated) 100%
  );
  background-size: 1000px 100%;
  animation: shimmer 2s infinite linear;
  border-radius: var(--radius-md);
}

.skeleton-card {
  height: 80px;
}

.skeleton-track {
  height: 72px;
}

.skeleton-album {
  height: 280px;
}

.mobile-player-expanded {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: linear-gradient(180deg, var(--color-bg-primary), var(--color-bg-secondary));
  z-index: 200;
  display: none;
  flex-direction: column;
  transform: translateY(100%);
  transition: transform var(--transition-slow);
}

.mobile-player-expanded.active {
  display: flex;
  transform: translateY(0);
}

.mobile-player-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-lg) var(--space-lg) var(--space-md);
}

.mobile-player-header span {
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--color-text-secondary);
}

.mobile-player-content {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: var(--space-xl) var(--space-lg);
  gap: var(--space-xl);
}

.mobile-player-cover {
  width: 80vw;
  max-width: 400px;
  aspect-ratio: 1;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  object-fit: cover;
}

.mobile-player-info {
  text-align: center;
  width: 100%;
}

.mobile-player-info h2 {
  font-size: 1.5rem;
  font-weight: 700;
  margin-bottom: var(--space-sm);
}

.mobile-player-info p {
  font-size: 1rem;
  color: var(--color-text-secondary);
}

.btn-icon-large {
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-text-secondary);
  transition: transform var(--transition-fast), color var(--transition-fast);
}

.btn-icon-large:hover,
.btn-icon-large.liked {
  color: var(--color-accent);
}

.btn-icon-large svg {
  width: 32px;
  height: 32px;
}

.mobile-player-progress {
  width: 100%;
}

.mobile-progress-bar {
  height: 16px;
  position: relative;
  display: flex;
  align-items: center;
  cursor: pointer;
  margin-bottom: var(--space-sm);
}

.mobile-time-display {
  display: flex;
  justify-content: space-between;
  font-size: 0.75rem;
  color: var(--color-text-secondary);
}

.mobile-player-controls {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  max-width: 400px;
  padding: 0 var(--space-md);
}

.player-btn-play-large {
  width: 72px;
  height: 72px;
  background: var(--color-text-primary);
  color: var(--color-bg-primary);
  border-radius: var(--radius-full);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: transform var(--transition-fast);
  box-shadow: var(--shadow-md);
}

.player-btn-play-large:hover {
  transform: scale(1.05);
}

.player-btn-play-large svg {
  width: 32px;
  height: 32px;
  margin-left: 3px;
}

.modal-overlay {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0, 0, 0, 0.8);
  backdrop-filter: blur(10px);
  display: none;
  align-items: center;
  justify-content: center;
  z-index: 300;
  animation: fadeIn var(--transition-normal);
}

.modal-overlay.active {
  display: flex;
}

.modal-content {
  background: var(--color-bg-elevated);
  border-radius: var(--radius-lg);
  width: 90%;
  max-width: 500px;
  max-height: 90vh;
  overflow: auto;
  box-shadow: var(--shadow-lg);
  animation: slideUp var(--transition-normal);
}

@keyframes slideUp {
  from { opacity: 0; transform: translateY(20px); }
  to { opacity: 1; transform: translateY(0); }
}

.modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-lg);
  border-bottom: 1px solid var(--color-border);
}

.modal-header h2 {
  font-size: 1.5rem;
  font-weight: 700;
}

.modal-body {
  padding: var(--space-lg);
}

.modal-body input[type="text"] {
  width: 100%;
  padding: var(--space-md);
  background: var(--color-bg-secondary);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  color: var(--color-text-primary);
  font-size: 1rem;
  margin-bottom: var(--space-lg);
  outline: none;
  transition: border-color var(--transition-fast);
}

.modal-body input[type="text"]:focus {
  border-color: var(--color-accent);
}

.color-picker label {
  display: block;
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--color-text-secondary);
  margin-bottom: var(--space-md);
}

.color-options {
  display: flex;
  gap: var(--space-md);
  flex-wrap: wrap;
}

.color-btn {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-md);
  border: 3px solid transparent;
  transition: transform var(--transition-fast);
  cursor: pointer;
}

.color-btn:hover {
  transform: scale(1.1);
}

.color-btn.active {
  border-color: var(--color-text-primary);
  box-shadow: 0 0 0 2px var(--color-bg-elevated), 0 0 0 4px var(--color-text-primary);
}

.modal-footer {
  display: flex;
  gap: var(--space-md);
  padding: var(--space-lg);
  border-top: 1px solid var(--color-border);
}

.modal-footer button {
  flex: 1;
}

.edit-track-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--space-sm) var(--space-md);
    background: var(--color-bg-secondary);
    border-radius: var(--radius-sm);
    margin-bottom: var(--space-sm);
}

.edit-track-name {
    font-weight: 500;
    font-size: 0.9rem;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    max-width: 65%;
}

.edit-actions {
    display: flex;
    gap: var(--space-xs);
}

.toast-container {
  position: fixed;
  bottom: calc(var(--player-height) + var(--space-lg));
  left: 50%;
  transform: translateX(-50%);
  z-index: 400;
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
  pointer-events: none;
}

@media (min-width: 769px) {
  .toast-container {
    left: calc(50% + var(--sidebar-width) / 2);
  }
}

.toast {
  background: var(--color-bg-elevated);
  color: var(--color-text-primary);
  padding: var(--space-md) var(--space-lg);
  border-radius: var(--radius-full);
  box-shadow: var(--shadow-lg);
  display: flex;
  align-items: center;
  justify-content: center; 
  gap: var(--space-md);
  min-width: 250px;
  animation: slideUp var(--transition-normal);
  pointer-events: auto;
}

.toast.success {
  background: var(--color-accent);
  color: var(--color-bg-primary);
}

.toast.error {
  background: #e74c3c;
  color: white;
}

.toast.removed {
    background: var(--color-bg-active);
    color: var(--color-text-primary);
    border: 1px solid var(--color-border);
}

.toast-icon {
  width: 20px;
  height: 20px;
  flex-shrink: 0;
}

.toast-message {
  flex: 1;
  font-size: 0.875rem;
  font-weight: 600;
  text-align: center; 
}

.player-btn.active {
  color: var(--color-accent);
}

.player-btn.shuffle-active {
  color: var(--color-accent);
  position: relative;
}

.player-btn.shuffle-active::after {
  content: '';
  position: absolute;
  bottom: 2px;
  left: 50%;
  transform: translateX(-50%);
  width: 4px;
  height: 4px;
  background: var(--color-accent);
  border-radius: var(--radius-full);
}

.player-btn.repeat-all,
.player-btn.repeat-one {
  color: var(--color-accent);
  position: relative;
}

.player-btn.repeat-one::before {
  content: '1';
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  font-size: 10px;
  font-weight: 700;
  color: var(--color-accent);
}

.playlist-cover-wrapper {
  width: 232px;
  height: 232px;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  overflow: hidden;
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
}

.playlist-cover-color {
  width: 100%;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 5rem;
  color: rgba(255, 255, 255, 0.9);
}

.playlist-cover-color svg {
  width: 96px;
  height: 96px;
  opacity: 0.7;
}

::-webkit-scrollbar {
  width: 12px;
  height: 12px;
}

::-webkit-scrollbar-track {
  background: transparent;
}

::-webkit-scrollbar-thumb {
  background: var(--color-bg-elevated);
  border-radius: var(--radius-full);
  border: 3px solid var(--color-bg-secondary);
  transition: background var(--transition-fast);
}

::-webkit-scrollbar-thumb:hover {
  background: var(--color-bg-active);
}

::-webkit-scrollbar-corner {
  background: transparent;
}

.track-card,
.album-card,
.quick-pick-card,
.nav-item,
.mobile-nav-item,
.playlist-item {
  position: relative;
  overflow: hidden;
}

.track-card::before,
.album-card::before,
.quick-pick-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255,255,255,0.05), transparent);
  transition: left var(--transition-slow);
}

.track-card:hover::before,
.album-card:hover::before,
.quick-pick-card:hover::before {
  left: 100%;
}

/* context menu*/

.context-menu {
  position: fixed;
  background: var(--color-bg-elevated);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-lg);
  padding: var(--space-sm);
  min-width: 220px;
  z-index: 1000;
  animation: fadeIn var(--transition-fast);
  max-height: 80vh;
  overflow-y: auto;
}

.context-menu-item {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  padding: var(--space-sm) var(--space-md);
  border-radius: var(--radius-sm);
  color: var(--color-text-primary);
  font-size: 0.875rem;
  cursor: pointer;
  transition: background-color var(--transition-fast);
}

.context-menu-item:hover {
  background: var(--color-bg-hover);
}

.context-menu-item svg {
  width: 16px;
  height: 16px;
  color: var(--color-text-secondary);
}

.context-menu-divider {
  height: 1px;
  background: var(--color-border);
  margin: var(--space-sm) 0;
}

/* mobile nav*/

.mobile-nav {
  display: none;
  grid-template-columns: repeat(3, 1fr);
  background: var(--color-bg-secondary);
  border-top: 1px solid var(--color-border);
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  z-index: 100;
  padding: var(--space-sm) 0;
}

.mobile-nav-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-xs);
  padding: var(--space-sm);
  color: var(--color-text-secondary);
  font-size: 0.75rem;
  font-weight: 600;
  transition: color var(--transition-fast);
}

.mobile-nav-item svg {
  width: 24px;
  height: 24px;
}

.mobile-nav-item.active {
  color: var(--color-text-primary);
}

/* lib tabs*/

.library-tabs {
  display: flex;
  gap: var(--space-md);
  margin-bottom: var(--space-lg);
  border-bottom: 1px solid var(--color-border);
}

.tab-btn {
  padding: var(--space-md) var(--space-lg);
  color: var(--color-text-secondary);
  font-weight: 600;
  border-bottom: 2px solid transparent;
  transition: all var(--transition-fast);
}

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

.tab-btn.active {
  color: var(--color-text-primary);
  border-bottom-color: var(--color-accent);
}

.library-content {
  min-height: 200px;
}

.create-new-card {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, rgba(255,255,255,0.1), rgba(255,255,255,0.05));
  border: 2px dashed rgba(255,255,255,0.2);
}

.create-new-icon {
  width: 48px;
  height: 48px;
  background: var(--color-bg-active);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: var(--space-md);
  transition: transform var(--transition-fast), background-color var(--transition-fast);
}

.album-card:hover .create-new-icon {
  background: var(--color-accent);
  color: var(--color-bg-primary);
  transform: scale(1.02);
}

/* responsive des */

@media (max-width: 1024px) {
  .app {
    grid-template-columns: 200px 1fr;
  }
  
  :root {
    --sidebar-width: 200px;
  }
  
  .section-heading {
    font-size: 1.75rem;
  }
  
  .section-title {
    font-size: 1.25rem;
  }
}

@media (max-width: 768px) {
  .app {
    grid-template-columns: 1fr;
    grid-template-rows: 1fr var(--player-height) var(--mobile-nav-height);
    padding: 0;
    gap: 0;
  }
  
  .sidebar {
    display: none;
  }
  
  .main-content {
    border-radius: 0;
    grid-row: 1;
  }
  
  .player-bar {
    border-radius: 0;
    border-top: 1px solid var(--color-border);
    grid-row: 2;
    grid-template-columns: 1fr;
    padding: var(--space-sm);
  }
  
  .player-track-info {
    order: -1;
  }
  
  .player-volume {
    display: none;
  }
  
  .mobile-nav {
    display: grid;
    grid-row: 3;
  }
  
  .content-scroll {
    padding: 0 var(--space-md) calc(var(--space-2xl) + var(--mobile-nav-height));
  }
  
  .quick-picks {
    grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  }
  
  .albums-carousel, .albums-grid-layout {
    grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
  }
  
  .detail-header {
    flex-direction: column;
    align-items: flex-start;
  }
  
  .detail-cover {
    width: 180px;
    height: 180px;
  }
  
  .detail-title {
    font-size: 2rem;
  }
  
  .modal-overlay {
    padding-left: 0;
  }
  
  .toast-container {
      left: 50%;
  }
}

@media (max-width: 480px) {
  .quick-picks {
    grid-template-columns: 1fr;
  }
  
  .albums-carousel, .albums-grid-layout {
    grid-template-columns: repeat(auto-fill, minmax(130px, 1fr));
  }
  
  .section-heading {
    font-size: 1.5rem;
  }
  
  .mobile-player-cover {
    width: 90vw;
  }
  
  .mobile-player-info h2 {
    font-size: 1.25rem;
  }
  
  .mobile-player-controls {
    gap: var(--space-sm);
  }
  
  .player-btn {
    width: 36px;
    height: 36px;
  }
  
  .player-btn svg {
    width: 18px;
    height: 18px;
  }
  
  .player-btn-play-large {
    width: 64px;
    height: 64px;
  }
  
  .player-btn-play-large svg {
    width: 28px;
    height: 28px;
  }
}