/**
 * PGATC Stats Website - Design System
 *
 * CSS Variables for colors, typography, spacing, and shadows.
 * This file should be loaded first, before other CSS files.
 */

/* ============================================================================
   CSS CUSTOM PROPERTIES (DESIGN TOKENS)
   ============================================================================ */

:root {
    /* --------------------------------------------------------------------
       COLOR PALETTE
       -------------------------------------------------------------------- */

    /* Primary Colors - Navy Blue (PGA branding) */
    --color-primary-900: #0f2744;
    --color-primary-800: #132e4d;
    --color-primary-700: #1a3a5c;
    --color-primary-600: #2563eb;
    --color-primary-500: #3b82f6;
    --color-primary-400: #60a5fa;
    --color-primary-300: #93c5fd;
    --color-primary-200: #bfdbfe;
    --color-primary-100: #dbeafe;
    --color-primary-50: #eff6ff;

    /* Secondary Colors - Golf Green */
    --color-secondary-900: #0a2e1f;
    --color-secondary-800: #1a4d3a;
    --color-secondary-700: #166534;
    --color-secondary-600: #16a34a;
    --color-secondary-500: #32CD32;
    --color-secondary-400: #4ade80;
    --color-secondary-300: #86efac;
    --color-secondary-200: #bbf7d0;
    --color-secondary-100: #dcfce7;
    --color-secondary-50: #f0fdf4;

    /* Neutral Colors - Gray Scale */
    --color-gray-900: #111827;
    --color-gray-800: #1f2937;
    --color-gray-700: #374151;
    --color-gray-600: #4b5563;
    --color-gray-500: #6b7280;
    --color-gray-400: #9ca3af;
    --color-gray-300: #d1d5db;
    --color-gray-200: #e5e7eb;
    --color-gray-100: #f3f4f6;
    --color-gray-50: #f9fafb;
    --color-white: #ffffff;

    /* Score Colors */
    --color-score-under: #dc2626;   /* Red for under par (good) */
    --color-score-par: #059669;     /* Green for par */
    --color-score-over: #ea580c;    /* Orange for over par */
    --color-score-bogey: #f59e0b;   /* Amber for bogey */
    --color-score-double: #b45309;  /* Dark amber for double bogey+ */

    /* Achievement Colors */
    --color-gold: #fbbf24;
    --color-silver: #9ca3af;
    --color-bronze: #d97706;

    /* Status Colors */
    --color-success: #22c55e;
    --color-warning: #f59e0b;
    --color-error: #ef4444;
    --color-info: #3b82f6;

    /* Tournament Type Colors */
    --color-weekly: #2563eb;
    --color-oneday: #16a34a;
    --color-challenge: #d97706;
    --color-world: #7c3aed;

    /* Achievement Club Colors */
    --color-hole-in-one: #dc2626;
    --color-double-eagle: #7c3aed;
    --color-eagle: #ea580c;
    --color-birdie: #16a34a;

    /* --------------------------------------------------------------------
       TYPOGRAPHY
       -------------------------------------------------------------------- */

    /* Font Families */
    --font-sans: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    --font-mono: 'SF Mono', 'Monaco', 'Inconsolata', 'Fira Mono', 'Droid Sans Mono', monospace;

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

    /* Font Weights */
    --font-normal: 400;
    --font-medium: 500;
    --font-semibold: 600;
    --font-bold: 700;

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

    /* Letter Spacing */
    --tracking-tight: -0.025em;
    --tracking-normal: 0;
    --tracking-wide: 0.025em;
    --tracking-wider: 0.05em;

    /* --------------------------------------------------------------------
       SPACING
       -------------------------------------------------------------------- */

    --space-0: 0;
    --space-1: 0.25rem;      /* 4px */
    --space-2: 0.5rem;       /* 8px */
    --space-3: 0.75rem;      /* 12px */
    --space-4: 1rem;         /* 16px */
    --space-5: 1.25rem;      /* 20px */
    --space-6: 1.5rem;       /* 24px */
    --space-8: 2rem;         /* 32px */
    --space-10: 2.5rem;      /* 40px */
    --space-12: 3rem;        /* 48px */
    --space-16: 4rem;        /* 64px */
    --space-20: 5rem;        /* 80px */
    --space-24: 6rem;        /* 96px */

    /* --------------------------------------------------------------------
       BORDERS
       -------------------------------------------------------------------- */

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

    --border-radius-none: 0;
    --border-radius-sm: 0.125rem;    /* 2px */
    --border-radius-md: 0.375rem;    /* 6px */
    --border-radius-lg: 0.5rem;      /* 8px */
    --border-radius-xl: 0.75rem;     /* 12px */
    --border-radius-2xl: 1rem;       /* 16px */
    --border-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-2xl: 0 25px 50px -12px rgba(0, 0, 0, 0.25);
    --shadow-inner: inset 0 2px 4px 0 rgba(0, 0, 0, 0.06);
    --shadow-none: none;

    /* Card Shadows */
    --shadow-card: 0 1px 3px rgba(0, 0, 0, 0.12), 0 1px 2px rgba(0, 0, 0, 0.08);
    --shadow-card-hover: 0 10px 20px rgba(0, 0, 0, 0.12), 0 4px 8px rgba(0, 0, 0, 0.06);

    /* --------------------------------------------------------------------
       TRANSITIONS
       -------------------------------------------------------------------- */

    --transition-fast: 150ms ease;
    --transition-normal: 250ms ease;
    --transition-slow: 350ms ease;

    /* --------------------------------------------------------------------
       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;

    /* --------------------------------------------------------------------
       LAYOUT
       -------------------------------------------------------------------- */

    --container-sm: 640px;
    --container-md: 768px;
    --container-lg: 1024px;
    --container-xl: 1280px;
    --container-2xl: 1536px;

    /* Header Height */
    --header-height: 80px;

    /* --------------------------------------------------------------------
       FOCUS STATES
       -------------------------------------------------------------------- */

    --focus-ring-color: var(--color-primary-500);
    --focus-ring-offset: 2px;
    --focus-ring-width: 2px;
}

/* ============================================================================
   BASE STYLES
   ============================================================================ */

*,
*::before,
*::after {
    box-sizing: border-box;
}

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

body {
    margin: 0;
    padding: 0;
    font-family: var(--font-sans);
    font-size: var(--text-base);
    font-weight: var(--font-normal);
    line-height: var(--leading-normal);
    color: var(--color-gray-100);
    background: linear-gradient(180deg, #00205B 0%, #0a1628 50%, #001a0d 100%);
    background-attachment: fixed;
    min-height: 100vh;
}

/* Focus visible for accessibility */
:focus-visible {
    outline: var(--focus-ring-width) solid var(--focus-ring-color);
    outline-offset: var(--focus-ring-offset);
}

/* Remove default focus for mouse users */
:focus:not(:focus-visible) {
    outline: none;
}

/* Links */
a {
    color: var(--color-secondary-400);
    text-decoration: none;
    transition: color var(--transition-fast);
}

a:hover {
    color: var(--color-secondary-300);
    text-decoration: underline;
}

/* Images */
img {
    max-width: 100%;
    height: auto;
    display: block;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
    margin: 0 0 var(--space-4);
    font-weight: var(--font-bold);
    line-height: var(--leading-tight);
    color: var(--color-white);
}

h1 { font-size: var(--text-4xl); }
h2 { font-size: var(--text-3xl); }
h3 { font-size: var(--text-2xl); }
h4 { font-size: var(--text-xl); }
h5 { font-size: var(--text-lg); }
h6 { font-size: var(--text-base); }

p {
    margin: 0 0 var(--space-4);
}

/* Selection */
::selection {
    background-color: var(--color-primary-200);
    color: var(--color-primary-900);
}

/* Scrollbar styling (WebKit) */
::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}

::-webkit-scrollbar-track {
    background: var(--color-gray-100);
}

::-webkit-scrollbar-thumb {
    background: var(--color-gray-400);
    border-radius: var(--border-radius-full);
}

::-webkit-scrollbar-thumb:hover {
    background: var(--color-gray-500);
}