/* ============================================
   TikTak Design System - Unified CSS
   Version 1.0.0
   ============================================ */

:root {
  /* === COLORS === */
  /* Primary */
  --color-primary: #8B5CF6;
  --color-primary-dark: #7C3AED;
  --color-primary-light: #A78BFA;
  --color-primary-glow: rgba(139, 92, 246, 0.2);

  /* Secondary */
  --color-secondary: #EC4899;
  --color-secondary-dark: #DB2777;
  --color-secondary-light: #F9A8D4;

  /* Accent */
  --color-success: #10B981;
  --color-warning: #F59E0B;
  --color-error: #EF4444;
  --color-info: #3B82F6;

  /* Neutral */
  --color-white: #FFFFFF;
  --color-gray-50: #F9FAFB;
  --color-gray-100: #F3F4F6;
  --color-gray-200: #E5E7EB;
  --color-gray-300: #D1D5DB;
  --color-gray-400: #9CA3AF;
  --color-gray-500: #6B7280;
  --color-gray-600: #4B5563;
  --color-gray-700: #374151;
  --color-gray-800: #1F2937;
  --color-gray-900: #111827;
  --color-black: #000000;

  /* Game Theme */
  --color-game-dark: #1a0033;
  --color-game-darker: #000511;
  --color-game-glow: rgba(139, 92, 246, 0.3);

  /* === GRADIENTS === */
  --gradient-primary: linear-gradient(135deg, #8B5CF6 0%, #EC4899 100%);
  --gradient-secondary: linear-gradient(135deg, #7C3AED 0%, #DB2777 100%);
  --gradient-dark: linear-gradient(180deg, #1a0033 0%, #000511 100%);
  --gradient-light: linear-gradient(135deg, #F5F3FF 0%, #FDF2F8 100%);

  /* === TYPOGRAPHY === */
  --font-primary: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;

  --text-xs: 0.75rem;
  --text-sm: 0.875rem;
  --text-base: 1rem;
  --text-lg: 1.125rem;
  --text-xl: 1.25rem;
  --text-2xl: 1.5rem;
  --text-3xl: 1.875rem;
  --text-4xl: 2.25rem;
  --text-5xl: 3rem;
  --text-6xl: 3.75rem;

  --font-normal: 400;
  --font-medium: 500;
  --font-semibold: 600;
  --font-bold: 700;
  --font-extrabold: 800;
  --font-black: 900;

  --leading-tight: 1.25;
  --leading-normal: 1.5;
  --leading-relaxed: 1.75;

  /* === SPACING === */
  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-5: 1.25rem;
  --space-6: 1.5rem;
  --space-8: 2rem;
  --space-10: 2.5rem;
  --space-12: 3rem;
  --space-16: 4rem;
  --space-20: 5rem;
  --space-24: 6rem;

  /* === BORDER RADIUS === */
  --radius-sm: 0.375rem;
  --radius-md: 0.5rem;
  --radius-lg: 0.75rem;
  --radius-xl: 1rem;
  --radius-2xl: 1.5rem;
  --radius-full: 9999px;

  /* === SHADOWS === */
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
  --shadow-glow: 0 0 20px rgba(139, 92, 246, 0.4);
  --shadow-glow-lg: 0 0 40px rgba(139, 92, 246, 0.5);

  /* === TRANSITIONS === */
  --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-normal: 200ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 300ms cubic-bezier(0.4, 0, 0.2, 1);

  /* === Z-INDEX === */
  --z-base: 0;
  --z-dropdown: 1000;
  --z-sticky: 1020;
  --z-fixed: 1030;
  --z-modal-bg: 1040;
  --z-modal: 1050;
  --z-popover: 1060;
  --z-tooltip: 1070;

  /* === SAFE AREA (iOS Notch) === */
  --safe-top: env(safe-area-inset-top);
  --safe-right: env(safe-area-inset-right);
  --safe-bottom: env(safe-area-inset-bottom);
  --safe-left: env(safe-area-inset-left);
}

/* === UNIVERSAL BUTTON STYLES === */
.btn {
  appearance: none;
  border: none;
  border-radius: var(--radius-lg);
  padding: var(--space-3) var(--space-6);
  font-weight: var(--font-semibold);
  font-family: var(--font-primary);
  font-size: var(--text-base);
  cursor: pointer;
  transition: all var(--transition-normal);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  min-height: 44px;
  text-decoration: none;
}

.btn-primary {
  background: var(--gradient-primary);
  color: var(--color-white);
  box-shadow: var(--shadow-md);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-xl), var(--shadow-glow);
}

.btn-primary:active {
  transform: translateY(0);
}

.btn-secondary {
  background: rgba(139, 92, 246, 0.1);
  color: var(--color-primary);
  border: 2px solid var(--color-primary);
}

.btn-secondary:hover {
  background: var(--color-primary);
  color: var(--color-white);
}

.btn-icon {
  padding: var(--space-3);
  min-width: 44px;
  width: 44px;
  height: 44px;
  background: rgba(255, 255, 255, 0.1);
  backdrop-filter: blur(10px);
  border: 1px solid rgba(255, 255, 255, 0.2);
}

.btn-icon:hover {
  background: rgba(255, 255, 255, 0.2);
  transform: scale(1.05);
}

/* === STATUS MESSAGES === */
.status {
  padding: var(--space-4) var(--space-5);
  border-radius: var(--radius-lg);
  margin: var(--space-4) 0;
  font-weight: var(--font-medium);
  border-left: 4px solid transparent;
  backdrop-filter: blur(10px);
  animation: slideIn var(--transition-normal);
}

.status-success {
  background: rgba(16, 185, 129, 0.9);
  color: var(--color-white);
  border-left-color: var(--color-success);
}

.status-error {
  background: rgba(239, 68, 68, 0.9);
  color: var(--color-white);
  border-left-color: var(--color-error);
}

.status-info {
  background: rgba(139, 92, 246, 0.9);
  color: var(--color-white);
  border-left-color: var(--color-primary);
}

.status-warning {
  background: rgba(245, 158, 11, 0.9);
  color: var(--color-white);
  border-left-color: var(--color-warning);
}

.status-loading {
  background: rgba(139, 92, 246, 0.9);
  color: var(--color-white);
  border-left-color: var(--color-primary);
}

/* === FOCUS STATES === */
*:focus-visible {
  outline: 3px solid var(--color-primary);
  outline-offset: 2px;
}

button:focus-visible {
  outline: 3px solid var(--color-primary-light);
  outline-offset: 2px;
}

/* === ANIMATIONS === */
@keyframes slideIn {
  from {
    opacity: 0;
    transform: translateY(-10px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes pulse {
  0%, 100% {
    opacity: 1;
  }
  50% {
    opacity: 0.6;
  }
}

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

/* === REDUCED MOTION === */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}

/* === DARK MODE SUPPORT (Game Screens) === */
.game-theme {
  --bg-primary: var(--color-game-dark);
  --bg-secondary: var(--color-game-darker);
  --text-primary: var(--color-white);
  --text-secondary: var(--color-gray-300);
}

body.game-theme {
  background: var(--gradient-dark);
  color: var(--text-primary);
}

/* === SAFE AREA SUPPORT === */
.safe-top {
  padding-top: max(var(--space-4), var(--safe-top));
}

.safe-bottom {
  padding-bottom: max(var(--space-4), var(--safe-bottom));
}

.safe-left {
  padding-left: max(var(--space-4), var(--safe-left));
}

.safe-right {
  padding-right: max(var(--space-4), var(--safe-right));
}

/* === UTILITIES === */
.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }

.font-bold { font-weight: var(--font-bold); }
.font-semibold { font-weight: var(--font-semibold); }
.font-medium { font-weight: var(--font-medium); }

.text-primary { color: var(--color-primary); }
.text-secondary { color: var(--color-secondary); }
.text-success { color: var(--color-success); }
.text-error { color: var(--color-error); }
.text-warning { color: var(--color-warning); }

.hidden { display: none; }
.flex { display: flex; }
.inline-flex { display: inline-flex; }
.grid { display: grid; }

.items-center { align-items: center; }
.justify-center { justify-content: center; }
.justify-between { justify-content: space-between; }

.gap-2 { gap: var(--space-2); }
.gap-4 { gap: var(--space-4); }
.gap-6 { gap: var(--space-6); }

.mt-4 { margin-top: var(--space-4); }
.mb-4 { margin-bottom: var(--space-4); }
.mx-auto { margin-left: auto; margin-right: auto; }

.p-4 { padding: var(--space-4); }
.p-6 { padding: var(--space-6); }

.rounded-lg { border-radius: var(--radius-lg); }
.rounded-xl { border-radius: var(--radius-xl); }
.rounded-full { border-radius: var(--radius-full); }

.shadow-md { box-shadow: var(--shadow-md); }
.shadow-lg { box-shadow: var(--shadow-lg); }
.shadow-xl { box-shadow: var(--shadow-xl); }

.cursor-pointer { cursor: pointer; }
.pointer-events-none { pointer-events: none; }

.opacity-50 { opacity: 0.5; }
.opacity-75 { opacity: 0.75; }

.transition-all { transition: all var(--transition-normal); }