/* ========================================
   HIGHSCORES DESIGN SYSTEM - CSS Variables
   ======================================== */

:root {
  /* ================================
     COLOR PALETTE
     ================================ */

  /* Primary - Indigo */
  --color-primary-50: #eef2ff;
  --color-primary-100: #e0e7ff;
  --color-primary-200: #c7d2fe;
  --color-primary-300: #a5b4fc;
  --color-primary-400: #818cf8;
  --color-primary-500: #6366f1;
  --color-primary-600: #4f46e5;
  --color-primary-700: #4338ca;
  --color-primary-800: #3730a3;
  --color-primary-900: #312e81;
  --color-primary-950: #1e1b4b;

  /* Secondary - Slate */
  --color-secondary-50: #f8fafc;
  --color-secondary-100: #f1f5f9;
  --color-secondary-200: #e2e8f0;
  --color-secondary-300: #cbd5e1;
  --color-secondary-400: #94a3b8;
  --color-secondary-500: #64748b;
  --color-secondary-600: #475569;
  --color-secondary-700: #334155;
  --color-secondary-800: #1e293b;
  --color-secondary-900: #0f172a;
  --color-secondary-950: #020617;

  /* Semantic Colors - Error (Red) */
  --color-error-50: #fef2f2;
  --color-error-100: #fee2e2;
  --color-error-light: var(--color-error-100);
  --color-error-500: #ef4444;
  --color-error: #ef4444;
  --color-error-700: #b91c1c;
  --color-error-dark: var(--color-error-700);
  --color-error-800: #991b1b;

  /* Semantic Colors - Warning (Amber) */
  --color-warning-50: #fffbeb;
  --color-warning-100: #fef3c7;
  --color-warning-light: var(--color-warning-100);
  --color-warning-500: #f59e0b;
  --color-warning: #f59e0b;
  --color-warning-700: #b45309;
  --color-warning-dark: var(--color-warning-700);
  --color-warning-800: #92400e;

  /* Semantic Colors - Success (Green) */
  --color-success-50: #f0fdf4;
  --color-success-100: #dcfce7;
  --color-success-light: var(--color-success-100);
  --color-success-500: #22c55e;
  --color-success: #22c55e;
  --color-success-700: #15803d;
  --color-success-dark: var(--color-success-700);
  --color-success-800: #166534;

  /* Semantic Colors - Info (Cyan) */
  --color-info-50: #ecfeff;
  --color-info-100: #cffafe;
  --color-info-light: var(--color-info-100);
  --color-info-500: #06b6d4;
  --color-info: #06b6d4;
  --color-info-700: #0e7490;
  --color-info-dark: var(--color-info-700);

  /* Gamification Colors */
  --color-xp: #a855f7;
  --color-gold: #fbbf24;
  --color-silver: #94a3b8;
  --color-bronze: #d97706;
  --color-streak: #f97316;

  /* ================================
     SPACING SCALE
     ================================ */
  --space-0: 0;
  --space-px: 1px;
  --space-0-5: 0.125rem;  /* 2px */
  --space-1: 0.25rem;     /* 4px */
  --space-1-5: 0.375rem;  /* 6px */
  --space-2: 0.5rem;      /* 8px */
  --space-2-5: 0.625rem;  /* 10px */
  --space-3: 0.75rem;     /* 12px */
  --space-3-5: 0.875rem;  /* 14px */
  --space-4: 1rem;        /* 16px */
  --space-5: 1.25rem;     /* 20px */
  --space-6: 1.5rem;      /* 24px */
  --space-7: 1.75rem;     /* 28px */
  --space-8: 2rem;        /* 32px */
  --space-9: 2.25rem;     /* 36px */
  --space-10: 2.5rem;     /* 40px */
  --space-11: 2.75rem;    /* 44px */
  --space-12: 3rem;       /* 48px */
  --space-14: 3.5rem;     /* 56px */
  --space-16: 4rem;       /* 64px */
  --space-20: 5rem;       /* 80px */
  --space-24: 6rem;       /* 96px */

  /* ================================
     TYPOGRAPHY
     ================================ */
  --font-family-base: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, sans-serif;
  --font-family-display: 'Poppins', var(--font-family-base);
  --font-family-mono: 'JetBrains Mono', 'Fira Code', Consolas, monospace;

  /* Font Sizes */
  --font-size-xs: 0.75rem;     /* 12px */
  --font-size-sm: 0.875rem;    /* 14px */
  --font-size-base: 1rem;      /* 16px */
  --font-size-lg: 1.125rem;    /* 18px */
  --font-size-xl: 1.25rem;     /* 20px */
  --font-size-2xl: 1.5rem;     /* 24px */
  --font-size-3xl: 1.875rem;   /* 30px */
  --font-size-4xl: 2.25rem;    /* 36px */
  --font-size-5xl: 3rem;       /* 48px */

  /* Line Heights */
  --line-height-none: 1;
  --line-height-tight: 1.25;
  --line-height-snug: 1.375;
  --line-height-normal: 1.5;
  --line-height-relaxed: 1.625;
  --line-height-loose: 2;

  /* Font Weights */
  --font-weight-light: 300;
  --font-weight-normal: 400;
  --font-weight-medium: 500;
  --font-weight-semibold: 600;
  --font-weight-bold: 700;
  --font-weight-extrabold: 800;

  /* Letter Spacing */
  --letter-spacing-tighter: -0.05em;
  --letter-spacing-tight: -0.025em;
  --letter-spacing-normal: 0;
  --letter-spacing-wide: 0.025em;
  --letter-spacing-wider: 0.05em;

  /* ================================
     BORDERS
     ================================ */
  --radius-none: 0;
  --radius-sm: 0.25rem;    /* 4px */
  --radius-md: 0.375rem;   /* 6px */
  --radius-lg: 0.5rem;     /* 8px */
  --radius-xl: 0.75rem;    /* 12px */
  --radius-2xl: 1rem;      /* 16px */
  --radius-3xl: 1.5rem;    /* 24px */
  --radius-full: 9999px;

  --border-width-thin: 1px;
  --border-width-medium: 2px;
  --border-width-thick: 4px;

  /* ================================
     SHADOWS
     ================================ */
  --shadow-xs: 0 1px 2px 0 rgb(0 0 0 / 0.05);
  --shadow-sm: 0 1px 3px 0 rgb(0 0 0 / 0.1), 0 1px 2px -1px rgb(0 0 0 / 0.1);
  --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
  --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
  --shadow-xl: 0 20px 25px -5px rgb(0 0 0 / 0.1), 0 8px 10px -6px rgb(0 0 0 / 0.1);
  --shadow-2xl: 0 25px 50px -12px rgb(0 0 0 / 0.25);
  --shadow-inner: inset 0 2px 4px 0 rgb(0 0 0 / 0.05);

  /* Colored Shadows */
  --shadow-primary: 0 4px 14px 0 rgb(99 102 241 / 0.3);
  --shadow-success: 0 4px 14px 0 rgb(34 197 94 / 0.3);
  --shadow-error: 0 4px 14px 0 rgb(239 68 68 / 0.3);
  --shadow-glow: 0 0 20px rgb(99 102 241 / 0.15);

  /* Gradients */
  --gradient-primary: linear-gradient(135deg, #6366f1, #8b5cf6);
  --gradient-success: linear-gradient(135deg, #10b981, #06b6d4);
  --gradient-warning: linear-gradient(135deg, #f59e0b, #ef4444);
  --gradient-accent: linear-gradient(135deg, #6366f1, #06b6d4);

  /* ================================
     Z-INDEX SCALE
     ================================ */
  --z-base: 0;
  --z-dropdown: 100;
  --z-sticky: 200;
  --z-fixed: 300;
  --z-modal-backdrop: 400;
  --z-modal: 500;
  --z-popover: 600;
  --z-tooltip: 700;
  --z-toast: 800;

  /* ================================
     TRANSITIONS
     ================================ */
  --transition-fast: 150ms;
  --transition-normal: 250ms;
  --transition-slow: 350ms;

  --ease-in: cubic-bezier(0.4, 0, 1, 1);
  --ease-out: cubic-bezier(0, 0, 0.2, 1);
  --ease-in-out: cubic-bezier(0.4, 0, 0.2, 1);
  --ease-bounce: cubic-bezier(0.68, -0.55, 0.265, 1.55);

  /* ================================
     LAYOUT
     ================================ */
  --container-sm: 640px;
  --container-md: 768px;
  --container-lg: 1024px;
  --container-xl: 1280px;
  --container-2xl: 1536px;

  --header-height: 64px;
  --header-height-mobile: 56px;
  --bottom-nav-height: 64px;
  --sidebar-width: 280px;
  --sidebar-width-collapsed: 72px;

  /* Safe Areas (iOS) */
  --safe-area-inset-top: env(safe-area-inset-top, 0px);
  --safe-area-inset-right: env(safe-area-inset-right, 0px);
  --safe-area-inset-bottom: env(safe-area-inset-bottom, 0px);
  --safe-area-inset-left: env(safe-area-inset-left, 0px);

  /* ================================
     SEMANTIC ALIASES (Light Theme Default)
     ================================ */

  /* Primary color shorthand */
  --primary-color: var(--color-primary-500);
  --primary-light: var(--color-primary-100);
  --primary-dark: var(--color-primary-700);

  /* Background colors */
  --bg-primary: #ffffff;
  --bg-secondary: var(--color-secondary-50);
  --bg-tertiary: var(--color-secondary-100);

  /* Text colors */
  --text-primary: var(--color-secondary-900);
  --text-secondary: var(--color-secondary-600);
  --text-tertiary: var(--color-secondary-400);

  /* Border color */
  --border-color: var(--color-secondary-200);

  /* Success colors */
  --success-color: var(--color-success);
  --success-light: var(--color-success-light);
  --success-dark: var(--color-success-dark);

  /* Warning colors */
  --warning-color: var(--color-warning);
  --warning-light: var(--color-warning-light);

  /* Error colors */
  --error-color: var(--color-error);
  --error-light: var(--color-error-light);

  /* ================================
     COMPONENT-SPECIFIC
     ================================ */

  /* Buttons */
  --btn-padding-x: var(--space-4);
  --btn-padding-y: var(--space-2-5);
  --btn-padding-x-sm: var(--space-3);
  --btn-padding-y-sm: var(--space-1-5);
  --btn-padding-x-lg: var(--space-6);
  --btn-padding-y-lg: var(--space-3);
  --btn-radius: var(--radius-lg);
  --btn-font-weight: var(--font-weight-semibold);

  /* Inputs */
  --input-padding-x: var(--space-3);
  --input-padding-y: var(--space-2-5);
  --input-radius: var(--radius-lg);
  --input-bg: white;
  --input-border: var(--color-secondary-300);
  --input-border-color: var(--color-secondary-300);
  --input-placeholder: var(--color-secondary-400);
  --input-focus-ring-color: #6366f1;

  /* Cards */
  --card-padding: var(--space-4);
  --card-radius: var(--radius-2xl);
  --card-bg: white;
  --card-bg-solid: white;
  --card-border: rgba(0, 0, 0, 0.06);
  --card-shadow: 0 2px 8px 0 rgb(0 0 0 / 0.08), 0 0 0 1px rgb(0 0 0 / 0.02);

  /* Avatar */
  --avatar-size-xs: 24px;
  --avatar-size-sm: 32px;
  --avatar-size-md: 40px;
  --avatar-size-lg: 48px;
  --avatar-size-xl: 64px;
  --avatar-size-2xl: 96px;

  /* Component shorthand aliases (used across game score wizards) */
  --color-text-muted: var(--color-secondary-400);   /* muted label text */
  --color-border: var(--color-secondary-200);        /* panel/card borders */
  --color-surface: white;                            /* card background */
  --color-surface-elevated: white;                   /* elevated panel background */
}