/* Sonora App Layout & Shell */
#app {
  display: flex;
  width: 100vw;
  height: 100vh;
  overflow: hidden;
  position: relative;
  background-color: var(--bg-app);
}

/* Sidebar (Desktop) */
.sidebar {
  width: var(--sidebar-width);
  height: 100%;
  display: flex;
  flex-direction: column;
  background-color: var(--bg-primary);
  border-right: 1px solid var(--border-subtle);
  z-index: var(--z-sidebar);
  flex-shrink: 0;
  padding: 24px 16px;
  box-sizing: border-box;
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 0 12px 28px 12px;
}

.brand-icon {
  width: 38px;
  height: 38px;
  border-radius: var(--radius-sm);
  background: linear-gradient(135deg, var(--accent-dynamic), #ec4899);
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 4px 16px var(--accent-dynamic-glow);
}

.brand-icon svg {
  width: 22px;
  height: 22px;
  fill: #ffffff;
}

.brand-name {
  font-family: var(--font-display);
  font-size: 1.45rem;
  font-weight: 800;
  letter-spacing: 2px;
  color: #ffffff;
}

.brand-badge {
  font-size: 0.65rem;
  font-weight: 700;
  background: rgba(255, 255, 255, 0.1);
  color: var(--accent-cyan);
  padding: 2px 6px;
  border-radius: var(--radius-xs);
  letter-spacing: 1px;
}

.nav-group {
  display: flex;
  flex-direction: column;
  gap: 6px;
  margin-bottom: 24px;
}

.nav-link {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 10px 14px;
  border-radius: var(--radius-sm);
  color: var(--text-secondary);
  font-weight: 500;
  font-size: 0.95rem;
  transition: all var(--transition-fast);
}

.nav-link svg {
  width: 20px;
  height: 20px;
  stroke: currentColor;
  stroke-width: 2;
  fill: none;
  transition: transform var(--transition-fast);
}

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

.nav-link.active {
  color: #ffffff;
  background-color: var(--bg-glass-active);
  font-weight: 600;
  box-shadow: inset 3px 0 0 var(--accent-dynamic);
}

.nav-link.active svg {
  stroke: var(--accent-dynamic);
  transform: scale(1.08);
}

.sidebar-divider {
  height: 1px;
  background: var(--border-subtle);
  margin: 12px 12px 20px 12px;
}

.sidebar-section-title {
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 1.5px;
  color: var(--text-muted);
  font-weight: 700;
  padding: 0 14px;
  margin-bottom: 10px;
}

.sidebar-playlists {
  flex: 1;
  overflow-y: auto;
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.playlist-nav-item {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 8px 14px;
  border-radius: var(--radius-sm);
  color: var(--text-secondary);
  font-size: 0.9rem;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

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

.sidebar-footer {
  margin-top: auto;
  padding-top: 16px;
}

.import-btn {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 11px 16px;
  background: linear-gradient(135deg, rgba(139, 92, 246, 0.2), rgba(236, 72, 153, 0.2));
  border: 1px solid var(--border-glow);
  border-radius: var(--radius-md);
  color: #ffffff;
  font-weight: 600;
  font-size: 0.9rem;
  transition: all var(--transition-normal);
}

.import-btn:hover {
  background: linear-gradient(135deg, rgba(139, 92, 246, 0.35), rgba(236, 72, 153, 0.35));
  box-shadow: 0 4px 20px var(--accent-dynamic-glow);
  transform: translateY(-1px);
}

/* Main Content Workspace */
.main-workspace {
  flex: 1;
  display: flex;
  flex-direction: column;
  height: 100%;
  overflow: hidden;
  position: relative;
  z-index: var(--z-base);
}

/* Top Navigation Bar */
.top-bar {
  height: var(--header-height);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 32px;
  background: rgba(13, 13, 20, 0.65);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border-subtle);
  z-index: var(--z-header);
  flex-shrink: 0;
}

.top-bar-title {
  font-size: 1.35rem;
  font-weight: 700;
}

.top-bar-actions {
  display: flex;
  align-items: center;
  gap: 16px;
}

/* Scrollable View Container */
.view-container {
  flex: 1;
  overflow-y: auto;
  padding: 32px;
  padding-bottom: calc(var(--mini-player-height) + 36px);
  position: relative;
}

/* Mobile Bottom Navigation Bar (Screens <= 768px) */
.mobile-nav-bar {
  display: none;
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  height: var(--mobile-nav-height);
  background: rgba(13, 13, 20, 0.94);
  backdrop-filter: blur(24px);
  border-top: 1px solid var(--border-subtle);
  z-index: var(--z-sidebar);
  align-items: center;
  justify-content: space-around;
  padding: 0 12px;
}

.mobile-nav-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
  color: var(--text-secondary);
  font-size: 0.72rem;
  font-weight: 500;
  padding: 6px 12px;
  border-radius: var(--radius-sm);
}

.mobile-nav-item.active {
  color: var(--accent-dynamic);
  font-weight: 700;
}

.mobile-nav-item svg {
  width: 22px;
  height: 22px;
  stroke: currentColor;
  stroke-width: 2;
  fill: none;
}

@media (max-width: 768px) {
  .sidebar {
    display: none;
  }
  .mobile-nav-bar {
    display: flex;
  }
  .top-bar {
    padding: 0 16px;
    height: 60px;
  }
  .view-container {
    padding: 16px;
    padding-bottom: calc(var(--mini-player-height) + var(--mobile-nav-height) + 24px);
  }
}