/* ─── CSS Custom Properties ───────────────────────────────────────────────── */
:root {
  /* Dark Mode Colors */
  --bg:        #07111f;
  --surface:   #0a1928;
  --surface2:  #0d2035;
  --border:    #1e2a3a;
  --text:      #e2eaf2;
  --muted:     #4a6080;
  
  /* Brand Colors */
  --accent:    #0ea5e9;
  --success:   #10b981;
  --warning:   #f59e0b;
  --danger:    #ef4444;
  --spotify:   #1DB954;
  --airplay:   #60a5fa;

  --font-ui:   'DM Sans', system-ui, sans-serif;
  --font-mono: 'DM Mono', 'Courier New', monospace;

  --radius:    8px;
  --radius-lg: 16px;
  
  /* Glassmorphism */
  --glass-bg:  rgba(10, 25, 40, 0.7);
  --glass-blur: 12px;
}

/* Light Mode */
@media (prefers-color-scheme: light) {
  :root {
    --bg:        #f8fafc;
    --surface:   #f1f5f9;
    --surface2:  #e2e8f0;
    --border:    #cbd5e1;
    --text:      #0f172a;
    --muted:     #64748b;
    --glass-bg:  rgba(241, 245, 249, 0.8);
  }
}

/* Custom Light Mode Toggle */
html.light-mode {
  --bg:        #f8fafc;
  --surface:   #f1f5f9;
  --surface2:  #e2e8f0;
  --border:    #cbd5e1;
  --text:      #0f172a;
  --muted:     #64748b;
  --glass-bg:  rgba(241, 245, 249, 0.8);
}

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

html, body, #root {
  height: 100%;
  overflow: hidden;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-ui);
  font-size: 16px;
  -webkit-tap-highlight-color: transparent;
  user-select: none;
}

/* ─── Scrollbar ───────────────────────────────────────────────────────────── */
::-webkit-scrollbar { width: 4px; }
::-webkit-scrollbar-track { background: var(--surface); }
::-webkit-scrollbar-thumb { background: var(--border); border-radius: 2px; }

/* ─── Animations ───────────────────────────────────────────────────────────── */
@keyframes spin {
  to { transform: rotate(360deg); }
}

@keyframes slideInUp {
  from { opacity: 0; transform: translateY(10px); }
  to { opacity: 1; transform: translateY(0); }
}

@keyframes slideInDown {
  from { opacity: 0; transform: translateY(-10px); }
  to { opacity: 1; transform: translateY(0); }
}

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

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.7; }
}

@keyframes shimmer {
  0% { background-position: -1000px 0; }
  100% { background-position: 1000px 0; }
}

/* ─── Glassmorphic Components ───────────────────────────────────────────────── */
.glass-panel {
  background: var(--glass-bg);
  backdrop-filter: blur(var(--glass-blur));
  -webkit-backdrop-filter: blur(var(--glass-blur));
  border: 1px solid rgba(255, 255, 255, 0.15);
  border-radius: var(--radius-lg);
}

.glass-card {
  background: var(--glass-bg);
  backdrop-filter: blur(var(--glass-blur));
  -webkit-backdrop-filter: blur(var(--glass-blur));
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: var(--radius);
  transition: all 0.3s cubic-bezier(0.23, 1, 0.320, 1);
}

.glass-card:hover {
  background: rgba(10, 25, 40, 0.85);
  border-color: rgba(255, 255, 255, 0.2);
  transform: translateY(-2px);
  box-shadow: 0 8px 32px rgba(14, 165, 233, 0.15);
}

/* Light mode card hover */
html.light-mode .glass-card:hover {
  background: rgba(241, 245, 249, 0.95);
  box-shadow: 0 8px 32px rgba(14, 165, 233, 0.1);
}

/* ─── Utilities ───────────────────────────────────────────────────────────── */
.mono { font-family: var(--font-mono); }
.muted { color: var(--muted); }
.accent { color: var(--accent); }

.fade-in { animation: fadeIn 0.3s ease-out; }
.slide-in-up { animation: slideInUp 0.3s cubic-bezier(0.23, 1, 0.320, 1); }
.slide-in-down { animation: slideInDown 0.3s cubic-bezier(0.23, 1, 0.320, 1); }
.pulse { animation: pulse 2s ease-in-out infinite; }

/* ─── Button Variants ───────────────────────────────────────────────────────── */

/* ─── Button Variants ───────────────────────────────────────────────────────── */
button {
  cursor: pointer;
  background: none;
  border: none;
  color: inherit;
  font-family: inherit;
  min-width: 44px;
  min-height: 44px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius);
  transition: all 0.2s cubic-bezier(0.23, 1, 0.320, 1);
  font-weight: 500;
}

button:hover {
  transform: scale(1.05);
}

button:active {
  opacity: 0.8;
  transform: scale(0.98);
}

/* Primary Button */
button.primary {
  background: var(--accent);
  color: white;
  box-shadow: 0 4px 15px rgba(14, 165, 233, 0.3);
}

button.primary:hover {
  background: #06b6d4;
  box-shadow: 0 6px 20px rgba(14, 165, 233, 0.4);
}

/* Ghost Button */
button.ghost {
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.15);
}

button.ghost:hover {
  background: rgba(255, 255, 255, 0.12);
  border-color: rgba(255, 255, 255, 0.25);
}

/* Icon Button */
button.icon {
  border-radius: 50%;
  width: 40px;
  height: 40px;
}

button.icon:hover {
  background: rgba(255, 255, 255, 0.1);
}

input[type=range] {
  -webkit-appearance: none;
  width: 100%;
  height: 4px;
  border-radius: 2px;
  background: var(--border);
  outline: none;
  cursor: pointer;
}
input[type=range]::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: var(--accent);
  cursor: pointer;
}