/* ============================================
   DESIGN SYSTEM — Jusqu'ici
   Glassmorphism + Cyberpunk Iridescent (subtle)
   ============================================ */

/* ---------- CSS Custom Properties ---------- */
:root {
  /* Typography */
  --font-primary: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  
  /* Spacing scale */
  --space-xs: 4px;
  --space-sm: 8px;
  --space-md: 16px;
  --space-lg: 24px;
  --space-xl: 32px;
  --space-2xl: 48px;
  --space-3xl: 64px;
  
  /* Radius */
  --radius-sm: 8px;
  --radius-md: 16px;
  --radius-lg: 24px;
  --radius-xl: 32px;
  --radius-2xl: 40px;
  --radius-full: 9999px;
  
  /* Transitions */
  --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-base: 250ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 400ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-spring: 500ms cubic-bezier(0.34, 1.56, 0.64, 1);
  
  /* Z-index layers */
  --z-base: 1;
  --z-nav: 100;
  --z-modal: 200;
  --z-overlay: 300;
  --z-toast: 400;
  
  /* Safe areas */
  --safe-top: env(safe-area-inset-top, 0px);
  --safe-bottom: env(safe-area-inset-bottom, 0px);
}

/* ---------- DARK THEME (default) ---------- */
[data-theme="dark"] {
  --bg-primary: #050508;
  --bg-secondary: #0a0d14;
  --bg-surface: rgba(13, 17, 23, 0.65);
  --bg-surface-elevated: rgba(18, 22, 30, 0.75);
  --bg-card: rgba(15, 19, 27, 0.7);
  
  --glass-bg: rgba(10, 15, 25, 0.6);
  --glass-bg-heavy: rgba(8, 12, 20, 0.8);
  --glass-border: rgba(255, 255, 255, 0.08);
  --glass-border-hover: rgba(255, 255, 255, 0.15);
  --glass-highlight: rgba(255, 255, 255, 0.04);
  
  --text-primary: #f1f5f9;
  --text-secondary: #94a3b8;
  --text-tertiary: #64748b;
  --text-inverse: #0f172a;
  
  --accent-primary: #3b82f6;
  --accent-primary-soft: rgba(59, 130, 246, 0.15);
  --accent-cyan: #06b6d4;
  --accent-cyan-glow: rgba(6, 182, 212, 0.3);
  --accent-purple: #8b5cf6;
  --accent-purple-glow: rgba(139, 92, 246, 0.25);
  --accent-pink: #ec4899;
  --accent-emerald: #10b981;
  --accent-amber: #f59e0b;
  --accent-red: #ef4444;
  
  --neon-cyan: #00f0ff;
  --neon-purple: #bc13fe;
  --neon-pink: #ff0099;
  
  --shadow-glass: 0 8px 32px rgba(0, 0, 0, 0.4);
  --shadow-glow: 0 0 20px rgba(59, 130, 246, 0.2);
  --shadow-neon: 0 0 30px rgba(0, 240, 255, 0.15);
  --shadow-card: 0 4px 24px rgba(0, 0, 0, 0.5);
  --shadow-float: 0 12px 40px rgba(0, 0, 0, 0.6);
  
  --gradient-iridescent: linear-gradient(135deg, rgba(59,130,246,0.4), rgba(139,92,246,0.4), rgba(236,72,153,0.3));
  --gradient-surface: linear-gradient(180deg, rgba(255,255,255,0.03) 0%, rgba(255,255,255,0) 100%);
  --gradient-hero: linear-gradient(180deg, transparent 0%, rgba(5,5,8,0.8) 100%);
  
  --input-bg: rgba(15, 23, 42, 0.6);
  --input-border: rgba(255, 255, 255, 0.1);
  --input-focus: rgba(59, 130, 246, 0.4);
  
  --divider: rgba(255, 255, 255, 0.06);
  
  --nav-bg: rgba(8, 12, 20, 0.85);
  --nav-active: var(--accent-cyan);
  
  --bubble-user: rgba(30, 41, 59, 0.5);
  --bubble-user-border: rgba(0, 240, 255, 0.15);
  --bubble-other: rgba(30, 30, 40, 0.8);
}

/* ---------- LIGHT THEME ---------- */
[data-theme="light"] {
  --bg-primary: #f6f7f8;
  --bg-secondary: #eef0f2;
  --bg-surface: rgba(255, 255, 255, 0.7);
  --bg-surface-elevated: rgba(255, 255, 255, 0.85);
  --bg-card: rgba(255, 255, 255, 0.75);
  
  --glass-bg: rgba(255, 255, 255, 0.65);
  --glass-bg-heavy: rgba(255, 255, 255, 0.85);
  --glass-border: rgba(255, 255, 255, 0.8);
  --glass-border-hover: rgba(255, 255, 255, 0.95);
  --glass-highlight: rgba(255, 255, 255, 0.5);
  
  --text-primary: #0f172a;
  --text-secondary: #475569;
  --text-tertiary: #94a3b8;
  --text-inverse: #f8fafc;
  
  --accent-primary: #2b7cee;
  --accent-primary-soft: rgba(43, 124, 238, 0.1);
  --accent-cyan: #0891b2;
  --accent-cyan-glow: rgba(8, 145, 178, 0.2);
  --accent-purple: #7c3aed;
  --accent-purple-glow: rgba(124, 58, 237, 0.15);
  --accent-pink: #db2777;
  --accent-emerald: #059669;
  --accent-amber: #d97706;
  --accent-red: #dc2626;
  
  --neon-cyan: #0891b2;
  --neon-purple: #7c3aed;
  --neon-pink: #db2777;
  
  --shadow-glass: 0 8px 32px rgba(31, 38, 135, 0.12);
  --shadow-glow: 0 0 20px rgba(43, 124, 238, 0.15);
  --shadow-neon: 0 0 20px rgba(43, 124, 238, 0.1);
  --shadow-card: 0 4px 24px rgba(0, 0, 0, 0.08);
  --shadow-float: 0 12px 40px rgba(0, 0, 0, 0.12);
  
  --gradient-iridescent: linear-gradient(135deg, rgba(43,124,238,0.2), rgba(124,58,237,0.2), rgba(219,39,119,0.15));
  --gradient-surface: linear-gradient(180deg, rgba(255,255,255,0.8) 0%, rgba(255,255,255,0.4) 100%);
  --gradient-hero: linear-gradient(180deg, transparent 0%, rgba(246,247,248,0.9) 100%);
  
  --input-bg: rgba(255, 255, 255, 0.6);
  --input-border: rgba(0, 0, 0, 0.08);
  --input-focus: rgba(43, 124, 238, 0.3);
  
  --divider: rgba(0, 0, 0, 0.06);
  
  --nav-bg: rgba(255, 255, 255, 0.8);
  --nav-active: var(--accent-primary);
  
  --bubble-user: rgba(43, 124, 238, 0.1);
  --bubble-user-border: rgba(43, 124, 238, 0.2);
  --bubble-other: rgba(255, 255, 255, 0.9);
}

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

html {
  font-size: 16px;
  -webkit-text-size-adjust: 100%;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font-primary);
  background: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.5;
  overflow: hidden;
  height: 100dvh;
  width: 100%;
  transition: background var(--transition-slow), color var(--transition-slow);
}

/* Scrollbar styling */
::-webkit-scrollbar { width: 0; height: 0; }
* { scrollbar-width: none; }

a { color: inherit; text-decoration: none; }
button { 
  background: none; border: none; cursor: pointer; 
  font-family: inherit; color: inherit; 
  -webkit-tap-highlight-color: transparent;
}
input, textarea { 
  font-family: inherit; 
  outline: none; 
  border: none;
  -webkit-appearance: none;
}
img { display: block; max-width: 100%; }

/* ---------- APP CONTAINER ---------- */
.app-container {
  position: relative;
  width: 100%;
  max-width: 430px;
  height: 100dvh;
  margin: 0 auto;
  overflow: hidden;
  background: var(--bg-primary);
}

@media (min-width: 768px) {
  .app-container {
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-float);
    border: 1px solid var(--glass-border);
    height: 90dvh;
    margin-top: 5dvh;
  }
}

.screen-container {
  position: relative;
  width: 100%;
  height: 100%;
  overflow: hidden;
}

/* ---------- SCREEN BASE ---------- */
.screen {
  position: absolute;
  top: 0; left: 0;
  width: 100%;
  height: 100%;
  overflow-y: auto;
  overflow-x: hidden;
  opacity: 0;
  transform: translateY(0);
  scrollbar-width: none;
  padding-bottom: 100px; /* space for bottom nav */
}

.screen.active {
  opacity: 1;
  transform: translateY(0);
  z-index: 2;
}

/* Screen enter animations */
.screen.screen-enter {
  animation: screen-slide-in 0.45s cubic-bezier(0.22, 1, 0.36, 1) forwards;
}

.screen.screen-enter-back {
  animation: screen-slide-in-back 0.4s cubic-bezier(0.22, 1, 0.36, 1) forwards;
}

/* Leaving screen overlay (fades out underneath) */
.screen.screen-exit {
  z-index: 1;
  opacity: 1;
  animation: screen-fade-shrink 0.4s cubic-bezier(0.4, 0, 1, 1) forwards;
}

.screen.screen-exit-back {
  z-index: 3;
  opacity: 1;
  animation: screen-slide-out-right 0.4s cubic-bezier(0.4, 0, 1, 1) forwards;
}

.screen.screen-no-nav {
  padding-bottom: 0;
}

.screen.screen-fullbleed {
  padding-bottom: 0;
  overflow: hidden;
}

/* ---------- AMBIENT BACKGROUND ---------- */
.ambient-bg {
  position: fixed;
  top: 0; left: 0;
  width: 100%; height: 100%;
  pointer-events: none;
  z-index: 0;
  overflow: hidden;
}

.ambient-blob {
  position: absolute;
  border-radius: 50%;
  filter: blur(80px);
  opacity: 0.4;
  animation: float-slow 20s ease-in-out infinite;
}

[data-theme="dark"] .ambient-blob { opacity: 0.25; }
[data-theme="light"] .ambient-blob { opacity: 0.3; }

.ambient-blob-1 {
  width: 300px; height: 300px;
  background: var(--accent-primary);
  top: -100px; right: -80px;
  animation-delay: 0s;
}
.ambient-blob-2 {
  width: 250px; height: 250px;
  background: var(--accent-purple);
  bottom: 20%; left: -60px;
  animation-delay: -7s;
}
.ambient-blob-3 {
  width: 200px; height: 200px;
  background: var(--accent-cyan);
  top: 40%; right: -40px;
  animation-delay: -14s;
}

/* ---------- GLASSMORPHISM COMPONENTS ---------- */
.glass-panel {
  background: var(--glass-bg);
  backdrop-filter: blur(24px);
  -webkit-backdrop-filter: blur(24px);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-glass);
}

.glass-panel-heavy {
  background: var(--glass-bg-heavy);
  backdrop-filter: blur(32px);
  -webkit-backdrop-filter: blur(32px);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-glass);
}

.glass-card {
  background: var(--bg-card);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-card);
  overflow: hidden;
  transition: transform var(--transition-base), box-shadow var(--transition-base);
}

.glass-card:active {
  transform: scale(0.98);
}

.glass-btn {
  background: var(--glass-bg);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-full);
  width: 44px; height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--transition-fast);
  box-shadow: var(--shadow-card);
}

.glass-btn:hover {
  border-color: var(--glass-border-hover);
  background: var(--bg-surface-elevated);
}

.glass-btn:active {
  transform: scale(0.92);
}

.glass-input {
  background: var(--input-bg);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid var(--input-border);
  border-radius: var(--radius-full);
  padding: 12px 20px;
  color: var(--text-primary);
  font-size: 14px;
  width: 100%;
  transition: all var(--transition-fast);
}

.glass-input::placeholder {
  color: var(--text-tertiary);
}

.glass-input:focus {
  border-color: var(--input-focus);
  box-shadow: 0 0 0 3px var(--accent-primary-soft);
}

.glass-pill {
  background: var(--glass-bg);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-full);
  padding: 8px 16px;
  font-size: 13px;
  font-weight: 500;
  color: var(--text-secondary);
  white-space: nowrap;
  transition: all var(--transition-fast);
  cursor: pointer;
}

.glass-pill:hover, .glass-pill.active {
  background: var(--accent-primary-soft);
  border-color: var(--accent-primary);
  color: var(--accent-primary);
}

/* ---------- BUTTONS ---------- */
.btn-primary {
  background: linear-gradient(135deg, var(--accent-primary), var(--accent-purple));
  color: white;
  border: none;
  border-radius: var(--radius-full);
  padding: 16px 32px;
  font-size: 16px;
  font-weight: 600;
  letter-spacing: 0.02em;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  width: 100%;
  position: relative;
  overflow: hidden;
  transition: all var(--transition-base);
  box-shadow: 0 4px 20px rgba(59, 130, 246, 0.3);
}

.btn-primary::after {
  content: '';
  position: absolute;
  top: 0; left: -100%;
  width: 100%; height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255,255,255,0.15), transparent);
  transition: left 0.6s ease;
}

.btn-primary:hover::after {
  left: 100%;
}

.btn-primary:active {
  transform: scale(0.97);
}

.btn-secondary {
  background: var(--glass-bg);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid var(--glass-border);
  color: var(--text-primary);
  border-radius: var(--radius-full);
  padding: 14px 28px;
  font-size: 15px;
  font-weight: 500;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  width: 100%;
  transition: all var(--transition-fast);
}

.btn-secondary:hover {
  border-color: var(--glass-border-hover);
}

.btn-secondary:active {
  transform: scale(0.97);
}

.btn-danger {
  background: rgba(239, 68, 68, 0.15);
  border: 1px solid rgba(239, 68, 68, 0.3);
  color: var(--accent-red);
  border-radius: var(--radius-full);
  padding: 14px 28px;
  font-size: 15px;
  font-weight: 600;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  transition: all var(--transition-fast);
}

.btn-danger:active { transform: scale(0.97); }

/* ---------- IRIDESCENT EFFECTS ---------- */
.iridescent-border {
  position: relative;
}

.iridescent-border::before {
  content: '';
  position: absolute;
  inset: -1px;
  border-radius: inherit;
  background: linear-gradient(135deg, 
    rgba(59,130,246,0.5), 
    rgba(139,92,246,0.5), 
    rgba(6,182,212,0.5), 
    rgba(236,72,153,0.3));
  background-size: 300% 300%;
  animation: gradient-shift 6s ease infinite;
  z-index: -1;
  mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
  mask-composite: exclude;
  -webkit-mask-composite: xor;
  padding: 1px;
}

.iridescent-text {
  background: linear-gradient(135deg, var(--text-primary), var(--accent-cyan), var(--accent-purple));
  background-size: 200% 200%;
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  animation: gradient-shift 4s ease infinite;
}

.text-glow {
  text-shadow: 0 0 20px var(--accent-cyan-glow);
}

.shadow-glow {
  box-shadow: var(--shadow-glow);
}

.shadow-neon {
  box-shadow: var(--shadow-neon);
}

/* ---------- BADGES ---------- */
.badge {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 4px 10px;
  border-radius: var(--radius-full);
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

.badge-verified {
  background: rgba(16, 185, 129, 0.15);
  color: var(--accent-emerald);
  border: 1px solid rgba(16, 185, 129, 0.2);
}

.badge-new {
  background: var(--accent-primary-soft);
  color: var(--accent-primary);
  border: 1px solid rgba(59, 130, 246, 0.2);
}

.badge-price {
  background: linear-gradient(135deg, var(--accent-primary), var(--accent-purple));
  color: white;
  font-size: 14px;
  font-weight: 700;
  padding: 6px 14px;
}

.badge-free {
  background: rgba(16, 185, 129, 0.15);
  color: var(--accent-emerald);
  border: 1px solid rgba(16, 185, 129, 0.2);
  font-size: 13px;
  font-weight: 700;
}

/* ---------- AVATAR ---------- */
.avatar {
  width: 44px; height: 44px;
  border-radius: 50%;
  object-fit: cover;
  border: 2px solid var(--glass-border);
}

.avatar-sm { width: 32px; height: 32px; }
.avatar-lg { width: 56px; height: 56px; }
.avatar-xl { width: 72px; height: 72px; }

.avatar-ring {
  padding: 2px;
  background: linear-gradient(135deg, var(--accent-cyan), var(--accent-purple));
  border-radius: 50%;
}

.avatar-ring img {
  border-radius: 50%;
  border: 2px solid var(--bg-primary);
}

.status-dot {
  width: 10px; height: 10px;
  border-radius: 50%;
  background: var(--accent-emerald);
  border: 2px solid var(--bg-primary);
  position: absolute;
  bottom: 0; right: 0;
  animation: pulse-dot 2s ease infinite;
}

.status-dot-offline {
  background: var(--accent-red);
  animation: none;
}

/* ---------- ANIMATIONS ---------- */
@keyframes float-slow {
  0%, 100% { transform: translateY(0) rotate(0deg); }
  33% { transform: translateY(-15px) rotate(2deg); }
  66% { transform: translateY(10px) rotate(-1deg); }
}

@keyframes gradient-shift {
  0%, 100% { background-position: 0% 50%; }
  50% { background-position: 100% 50%; }
}

@keyframes pulse-dot {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.7; transform: scale(1.2); }
}

@keyframes spin-slow {
  from { transform: rotate(0deg); }
  to { transform: rotate(360deg); }
}

@keyframes spin-reverse {
  from { transform: rotate(360deg); }
  to { transform: rotate(0deg); }
}

@keyframes ripple {
  0% { transform: scale(0.8); opacity: 0.6; }
  100% { transform: scale(2); opacity: 0; }
}

@keyframes shimmer {
  0% { transform: translateX(-100%) skewX(-15deg); }
  100% { transform: translateX(200%) skewX(-15deg); }
}

@keyframes bounce-slow {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-8px); }
}

@keyframes scale-in {
  0% { transform: scale(0.8); opacity: 0; }
  100% { transform: scale(1); opacity: 1; }
}

@keyframes fade-up {
  0% { transform: translateY(20px); opacity: 0; }
  100% { transform: translateY(0); opacity: 1; }
}

@keyframes slide-up {
  0% { transform: translateY(100%); }
  100% { transform: translateY(0); }
}

@keyframes float {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-6px); }
}

@keyframes iridescent {
  0%, 100% { box-shadow: 0 0 15px var(--accent-cyan-glow), 0 0 30px transparent; }
  33% { box-shadow: 0 0 15px var(--accent-purple-glow), 0 0 30px transparent; }
  66% { box-shadow: 0 0 15px rgba(236,72,153,0.2), 0 0 30px transparent; }
}

/* Screen transition keyframes */
@keyframes screen-slide-in {
  0% { opacity: 0; transform: translateX(60px) scale(0.97); }
  100% { opacity: 1; transform: translateX(0) scale(1); }
}

@keyframes screen-slide-in-back {
  0% { opacity: 0; transform: translateX(-40px) scale(0.97); }
  100% { opacity: 1; transform: translateX(0) scale(1); }
}

@keyframes screen-fade-shrink {
  0% { opacity: 1; transform: scale(1); }
  100% { opacity: 0; transform: scale(0.95); }
}

@keyframes screen-slide-out-right {
  0% { opacity: 1; transform: translateX(0); }
  100% { opacity: 0; transform: translateX(60px); }
}

/* Masonry cascade animation */
@keyframes masonry-cascade-in {
  0% { opacity: 0; transform: translateY(30px); }
  100% { opacity: 1; transform: translateY(0); }
}

.masonry-item {
  opacity: 0;
  animation: masonry-cascade-in 0.5s cubic-bezier(0.25, 0.46, 0.45, 0.94) forwards;
}
.masonry-item:nth-child(1) { animation-delay: 0.05s; }
.masonry-item:nth-child(2) { animation-delay: 0.12s; }
.masonry-item:nth-child(3) { animation-delay: 0.19s; }
.masonry-item:nth-child(4) { animation-delay: 0.26s; }
.masonry-item:nth-child(5) { animation-delay: 0.33s; }
.masonry-item:nth-child(6) { animation-delay: 0.40s; }
.masonry-item:nth-child(7) { animation-delay: 0.47s; }
.masonry-item:nth-child(8) { animation-delay: 0.54s; }
.masonry-item:nth-child(9) { animation-delay: 0.61s; }
.masonry-item:nth-child(10) { animation-delay: 0.68s; }

/* ---------- UTILITY CLASSES ---------- */
.flex { display: flex; }
.flex-col { flex-direction: column; }
.flex-center { display: flex; align-items: center; justify-content: center; }
.flex-between { display: flex; align-items: center; justify-content: space-between; }
.items-center { align-items: center; }
.justify-center { justify-content: center; }
.gap-xs { gap: var(--space-xs); }
.gap-sm { gap: var(--space-sm); }
.gap-md { gap: var(--space-md); }
.gap-lg { gap: var(--space-lg); }
.gap-xl { gap: var(--space-xl); }

.p-sm { padding: var(--space-sm); }
.p-md { padding: var(--space-md); }
.p-lg { padding: var(--space-lg); }
.p-xl { padding: var(--space-xl); }
.px-md { padding-left: var(--space-md); padding-right: var(--space-md); }
.px-lg { padding-left: var(--space-lg); padding-right: var(--space-lg); }
.py-sm { padding-top: var(--space-sm); padding-bottom: var(--space-sm); }
.py-md { padding-top: var(--space-md); padding-bottom: var(--space-md); }

.mt-sm { margin-top: var(--space-sm); }
.mt-md { margin-top: var(--space-md); }
.mt-lg { margin-top: var(--space-lg); }
.mb-sm { margin-bottom: var(--space-sm); }
.mb-md { margin-bottom: var(--space-md); }

.text-xs { font-size: 11px; }
.text-sm { font-size: 13px; }
.text-base { font-size: 15px; }
.text-lg { font-size: 18px; }
.text-xl { font-size: 22px; }
.text-2xl { font-size: 26px; }
.text-3xl { font-size: 32px; }
.text-4xl { font-size: 40px; }

.font-light { font-weight: 300; }
.font-normal { font-weight: 400; }
.font-medium { font-weight: 500; }
.font-semibold { font-weight: 600; }
.font-bold { font-weight: 700; }
.font-black { font-weight: 900; }

.tracking-tight { letter-spacing: -0.02em; }
.tracking-wide { letter-spacing: 0.05em; }
.tracking-wider { letter-spacing: 0.1em; }
.uppercase { text-transform: uppercase; }
.text-center { text-align: center; }
.leading-tight { line-height: 1.2; }
.leading-relaxed { line-height: 1.7; }

.text-primary { color: var(--text-primary); }
.text-secondary { color: var(--text-secondary); }
.text-tertiary { color: var(--text-tertiary); }
.text-accent { color: var(--accent-primary); }
.text-cyan { color: var(--accent-cyan); }
.text-purple { color: var(--accent-purple); }
.text-emerald { color: var(--accent-emerald); }
.text-amber { color: var(--accent-amber); }

.w-full { width: 100%; }
.h-full { height: 100%; }
.relative { position: relative; }
.absolute { position: absolute; }
.overflow-hidden { overflow: hidden; }
.truncate { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.rounded-full { border-radius: var(--radius-full); }
.rounded-xl { border-radius: var(--radius-xl); }
.rounded-2xl { border-radius: var(--radius-2xl); }
.mono { font-family: 'SF Mono', 'Fira Code', monospace; }