/* ==========================================================================
   StreamPulse Premium Design System (Apple / shadcn Glassmorphic Aesthetics)
   Rock-solid Light & Dark Mode via CSS Variables + Dynamic Themes
   ========================================================================== */

:root {
  /* Light Theme Tokens */
  --bg-app: #f8fafc;
  --bg-glass: rgba(255, 255, 255, 0.82);
  --bg-glass-elevated: rgba(255, 255, 255, 0.95);
  --bg-input: #ffffff;
  --bg-badge: rgba(241, 245, 249, 0.9);
  --border-glass: rgba(15, 23, 42, 0.08);
  --border-input: #cbd5e1;
  --border-badge: #e2e8f0;
  --shadow-glass: 0 20px 25px -5px rgba(15, 23, 42, 0.05), 0 8px 10px -6px rgba(15, 23, 42, 0.03);
  
  --text-title: #0f172a;
  --text-body: #475569;
  --text-muted: #64748b;
  --text-placeholder: #94a3b8;
  
  --btn-primary-bg: #0f172a;
  --btn-primary-text: #ffffff;
  --btn-primary-hover: #1e293b;

  --card-selected-border: #0f172a;
  --card-selected-bg: #f1f5f9;

  --orb-opacity: 0.45;
  color-scheme: light;
}

html.dark {
  /* Dark Theme Tokens */
  --bg-app: #09090b;
  --bg-glass: rgba(18, 18, 20, 0.72);
  --bg-glass-elevated: rgba(24, 24, 27, 0.85);
  --bg-input: rgba(24, 24, 27, 0.85);
  --bg-badge: rgba(24, 24, 27, 0.8);
  --border-glass: rgba(255, 255, 255, 0.08);
  --border-input: rgba(255, 255, 255, 0.12);
  --border-badge: rgba(255, 255, 255, 0.08);
  --shadow-glass: 0 25px 50px -12px rgba(0, 0, 0, 0.7), inset 0 1px 0 0 rgba(255, 255, 255, 0.05);

  --text-title: #f8fafc;
  --text-body: #a1a1aa;
  --text-muted: #71717a;
  --text-placeholder: #52525b;

  --btn-primary-bg: #f8fafc;
  --btn-primary-text: #09090b;
  --btn-primary-hover: #e4e4e7;

  --card-selected-border: #f8fafc;
  --card-selected-bg: #18181b;

  --orb-opacity: 0.7;
  color-scheme: dark;
}

/* Base Body Styling */
body {
  background-color: var(--bg-app) !important;
  color: var(--text-title) !important;
  transition: background-color 0.2s ease, color 0.2s ease;
}

/* Glass Surface Components */
.glass-panel {
  background: var(--bg-glass) !important;
  backdrop-filter: blur(20px) saturate(190%);
  -webkit-backdrop-filter: blur(20px) saturate(190%);
  border: 1px solid var(--border-glass) !important;
  box-shadow: var(--shadow-glass) !important;
  transition: background 0.2s ease, border-color 0.2s ease, box-shadow 0.2s ease;
}

.glass-pill {
  background: var(--bg-badge) !important;
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border: 1px solid var(--border-badge) !important;
}

/* High Contrast Headings & Text Classes */
.theme-title {
  color: var(--text-title) !important;
}

.theme-body {
  color: var(--text-body) !important;
}

.theme-muted {
  color: var(--text-muted) !important;
}

.theme-badge {
  background: var(--bg-badge) !important;
  border: 1px solid var(--border-badge) !important;
  color: var(--text-body) !important;
}

/* Input Styles */
input[type="url"], select {
  background: var(--bg-input) !important;
  color: var(--text-title) !important;
  border: 1px solid var(--border-input) !important;
  transition: border-color 0.15s ease, box-shadow 0.15s ease;
}

input[type="url"]::placeholder {
  color: var(--text-placeholder) !important;
}

input[type="url"]:focus, select:focus {
  border-color: var(--text-title) !important;
  outline: none;
}

/* Primary Action Buttons */
.btn-primary {
  background-color: var(--btn-primary-bg) !important;
  color: var(--btn-primary-text) !important;
  font-weight: 600;
  transition: background-color 0.15s ease, transform 0.1s ease;
}

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

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

/* Format Card active / hover states */
.format-card {
  background: var(--bg-glass-elevated);
  border: 1px solid var(--border-glass);
  transition: all 0.18s cubic-bezier(0.4, 0, 0.2, 1);
  user-select: none;
}

.format-card:hover {
  transform: translateY(-1px);
  border-color: var(--border-input);
}

.format-card.selected {
  border-color: var(--card-selected-border) !important;
  background-color: var(--card-selected-bg) !important;
  box-shadow: 0 0 0 1.5px var(--card-selected-border);
}

/* Custom sleek scrollbar */
::-webkit-scrollbar {
  width: 6px;
  height: 6px;
}

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

::-webkit-scrollbar-thumb {
  background: var(--text-muted);
  opacity: 0.4;
  border-radius: 9999px;
}

/* Spinner Animation */
.spinner {
  width: 15px;
  height: 15px;
  border: 2px solid rgba(125, 125, 125, 0.3);
  border-top-color: currentColor;
  border-radius: 50%;
  animation: spin 0.6s linear infinite;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

/* Drawer transitions */
#historyDrawer.open {
  transform: translateX(0);
}

/* Custom Checkbox */
input[type="checkbox"] {
  accent-color: var(--btn-primary-bg);
}

/* Playlist Track Row */
.playlist-track-row:hover {
  background-color: var(--bg-badge);
}

.playlist-track-row.active-downloading {
  background-color: var(--card-selected-bg);
  border-left: 2px solid var(--card-selected-border);
}

/* Ambient glow opacity control */
.ambient-orb {
  opacity: var(--orb-opacity);
  transition: opacity 0.3s ease;
}