/* ==============================================
   BASE CSS - Typography, Variables, Reset
   ============================================== */

:root {
    /* Light Theme - Saudi Vision 2030 Inspired */
    /* Primary Colors */
    --primary-green: #009639;          /* Saudi Flag Green - Main accents */
    --primary-gold: #FFD700;           /* Gold - Highlights & secondary CTAs */
    --primary-gold-hover: #E6C200;     /* Deeper gold for hover */
    --primary-green-hover: #007A2E;    /* Darker green for hover */

    /* Background Colors */
    --bg-color: #FFFFFF;
    --bg-secondary: #F5F5F5;           /* Light gray background */
    --section-bg: #FFFFFF;

    /* Text Colors - WCAG AA Compliant */
    --text-color: #1B263B;             /* Dark navy - Primary text */
    --text-muted: #4A5568;             /* Secondary text */
    --text-on-primary: #FFFFFF;        /* Text on green/gold buttons */
    --text-on-dark: #FFFFFF;           /* Text on dark backgrounds */

    /* Header & Footer - Saudi Vision 2030 Gradient */
    --header-bg: linear-gradient(135deg, #009639 0%, #007A2E 50%, #005A22 100%);
    --footer-bg: linear-gradient(135deg, #1B263B 0%, #0D1B2A 100%);

    /* Accent & Interactive */
    --accent-color: #009639;
    --accent-hover: #007A2E;
    --accent-secondary: #FFD700;
    --accent-secondary-hover: #E6C200;
    --link-color: #1E90FF;             /* Accent blue for links */
    --link-hover: #0066CC;

    /* Borders & Shadows */
    --border-color: rgba(27, 38, 59, 0.12);
    --shadow-color: rgba(27, 38, 59, 0.1);

    /* Card Colors */
    --card-bg: #FFFFFF;
    --card-hover-bg: #F5F5F5;
    --card-border: rgba(0, 150, 57, 0.15);

    /* Skill & Badge */
    --skill-border: #009639;

    /* Status Colors */
    --success-color: #009639;
    --warning-color: #FFD700;
    --error-color: #DC2626;

    /* Typography - Modern Serif for Vision 2030 */
    --font-primary: 'Cinzel', serif;
    --font-secondary: 'Cinzel', serif;
    --font-heading: 'Cinzel', serif;
    --font-size-base: 16px;
    --font-size-sm: 0.875rem;
    --font-size-lg: 1.125rem;
    --font-size-xl: 1.25rem;
    --font-size-2xl: 1.5rem;
    --font-size-3xl: 1.875rem;
    --font-size-4xl: 2.25rem;
    --font-size-5xl: 3rem;
    --line-height-base: 1.7;
    --line-height-tight: 1.3;
    --font-weight-normal: 400;
    --font-weight-medium: 500;
    --font-weight-semibold: 600;
    --font-weight-bold: 700;

    /* Transitions */
    --transition-speed: 300ms;
    --transition-speed-slow: 400ms;
    --transition-timing: cubic-bezier(0.4, 0, 0.2, 1);

    /* Shadows */
    --shadow-sm: 0 1px 2px var(--shadow-color);
    --shadow-md: 0 4px 6px var(--shadow-color);
    --shadow-lg: 0 10px 15px var(--shadow-color);
    --shadow-xl: 0 20px 25px var(--shadow-color);

    /* Border Radius */
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 12px;
    --radius-xl: 16px;
    --radius-full: 9999px;

    /* Spacing */
    --space-xs: 0.25rem;
    --space-sm: 0.5rem;
    --space-md: 1rem;
    --space-lg: 1.5rem;
    --space-xl: 2rem;
    --space-2xl: 3rem;
    --space-3xl: 4rem;
    --space-4xl: 6rem;
}

/* Dark Mode - Saudi Vision 2030 Inspired */
body.dark-mode {
    /* Background Colors */
    --bg-color: #0D1B2A;               /* Deep navy - Main background */
    --bg-secondary: #1B263B;           /* Dark gray - Secondary bg */
    --section-bg: #1B263B;

    /* Text Colors - WCAG AA Compliant */
    --text-color: #F5F5F5;             /* Light text */
    --text-muted: #A0AEC0;             /* Muted text */
    --text-on-primary: #FFFFFF;
    --text-on-dark: #F5F5F5;

    /* Header & Footer */
    --header-bg: linear-gradient(135deg, #0D1B2A 0%, #1B263B 50%, #009639 100%);
    --footer-bg: linear-gradient(135deg, #0D1B2A 0%, #1B263B 100%);

    /* Accent & Interactive - Green stays prominent */
    --accent-color: #00B347;           /* Brighter green for dark mode */
    --accent-hover: #009639;
    --accent-secondary: #FFD700;
    --accent-secondary-hover: #E6C200;
    --link-color: #1E90FF;
    --link-hover: #4DA6FF;

    /* Borders & Shadows */
    --border-color: rgba(245, 245, 245, 0.12);
    --shadow-color: rgba(0, 0, 0, 0.4);

    /* Card Colors */
    --card-bg: rgba(27, 38, 59, 0.95);
    --card-hover-bg: rgba(39, 55, 77, 0.98);
    --card-border: rgba(0, 179, 71, 0.2);

    /* Skill & Badge */
    --skill-border: #00B347;

    /* Status Colors */
    --success-color: #00B347;
    --warning-color: #FFD700;
    --error-color: #EF4444;
}

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

html {
    scroll-behavior: smooth;
    font-size: var(--font-size-base);
    -webkit-text-size-adjust: 100%;
    text-size-adjust: 100%;
}

body {
    font-family: var(--font-secondary);
    background: var(--bg-color);
    color: var(--text-color);
    line-height: var(--line-height-base);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    transition: background-color var(--transition-speed) var(--transition-timing),
                color var(--transition-speed) var(--transition-timing);
    overflow-x: hidden;
    padding-left: env(safe-area-inset-left, 0);
    padding-right: env(safe-area-inset-right, 0);
    font-weight: var(--font-weight-normal);
    letter-spacing: -0.01em;
}

main {
    flex: 1;
    width: 100%;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-heading);
    font-weight: var(--font-weight-bold);
    line-height: var(--line-height-tight);
    color: var(--text-color);
    margin-bottom: var(--space-md);
    letter-spacing: -0.02em;
}

h1 { font-size: clamp(2rem, 5vw, var(--font-size-5xl)); font-weight: 800; }
h2 { font-size: clamp(1.5rem, 4vw, var(--font-size-4xl)); }
h3 { font-size: clamp(1.25rem, 3vw, var(--font-size-3xl)); }
h4 { font-size: var(--font-size-2xl); }
h5 { font-size: var(--font-size-xl); font-weight: var(--font-weight-semibold); }
h6 { font-size: var(--font-size-lg); font-weight: var(--font-weight-semibold); }

p {
    margin-bottom: var(--space-md);
    line-height: var(--line-height-base);
}

a {
    color: var(--link-color);
    text-decoration: none;
    transition: color var(--transition-speed) var(--transition-timing);
}

a:hover {
    color: var(--accent-color);
}

img, video {
    max-width: 100%;
    height: auto;
    display: block;
}

ul, ol {
    padding-left: var(--space-lg);
    margin-bottom: var(--space-md);
}

li {
    margin-bottom: var(--space-xs);
}

strong, b {
    font-weight: 700;
}

/* Selection - Saudi Vision 2030 Branded */
::selection {
    background: var(--accent-color);
    color: var(--text-on-primary);
}

::-moz-selection {
    background: var(--accent-color);
    color: var(--text-on-primary);
}

/* Scrollbar */
::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}

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

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

::-webkit-scrollbar-thumb:hover {
    background: var(--text-muted);
}

/* Focus styles for accessibility - WCAG AA Compliant */
:focus-visible {
    outline: 3px solid var(--accent-secondary);
    outline-offset: 2px;
}

/* Enhanced focus for links */
a:focus-visible {
    outline: 2px solid var(--accent-color);
    outline-offset: 3px;
    border-radius: 2px;
}

/* High contrast focus for buttons */
.btn:focus-visible {
    outline: 3px solid var(--accent-secondary);
    outline-offset: 3px;
    box-shadow: 0 0 0 6px rgba(255, 215, 0, 0.2);
}

/* Screen reader only */
.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

/* Hidden utility */
.hidden {
    display: none !important;
}

/* Reduced motion support */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }

    html {
        scroll-behavior: auto;
    }
}