/* ============================================
   DONRESOURCES UNIFIED DESIGN SYSTEM
   File: main.css
   Version: 2.0
   Description: Core styles and design tokens
   ============================================ */

/* ============================================
   CSS VARIABLES - DESIGN TOKENS
   ============================================ */
:root {
    /* ---- Primary Colors ---- */
    --color-primary: #003366;
    --color-primary-dark: #002244;
    --color-primary-light: #004488;
    --color-primary-rgb: 0, 51, 102;
    
    /* ---- Secondary Colors ---- */
    --color-secondary: #C9A227;
    --color-secondary-dark: #A8881A;
    --color-secondary-light: #DAB84A;
    --color-secondary-rgb: 201, 162, 39;
    
    /* ---- Accent Colors ---- */
    --color-accent: #2E8B57;
    --color-accent-dark: #1E6B3A;
    --color-accent-light: #3DAF6A;
    
    /* ---- Neutral Colors ---- */
    --color-white: #FFFFFF;
    --color-black: #000000;
    --color-gray-50: #F8F9FA;
    --color-gray-100: #F0F2F5;
    --color-gray-200: #E4E6EB;
    --color-gray-300: #CCCFD4;
    --color-gray-400: #A0A4AB;
    --color-gray-500: #6C757D;
    --color-gray-600: #495057;
    --color-gray-700: #343A40;
    --color-gray-800: #212529;
    --color-gray-900: #1A1A1A;
    
    /* ---- Typography ---- */
    --font-primary: 'Poppins', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --font-secondary: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    
    /* ---- Font Sizes ---- */
    --text-xs: 12px;
    --text-sm: 14px;
    --text-base: 16px;
    --text-lg: 18px;
    --text-xl: 20px;
    --text-2xl: 24px;
    --text-3xl: 30px;
    --text-4xl: 36px;
    --text-5xl: 48px;
    --text-6xl: 60px;
    
    /* ---- Spacing ---- */
    --spacing-xs: 4px;
    --spacing-sm: 8px;
    --spacing-md: 16px;
    --spacing-lg: 24px;
    --spacing-xl: 32px;
    --spacing-2xl: 48px;
    --spacing-3xl: 64px;
    --spacing-4xl: 80px;
    
    /* ---- Borders ---- */
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 12px;
    --radius-xl: 16px;
    --radius-2xl: 20px;
    --radius-full: 9999px;
    
    /* ---- Shadows ---- */
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.08);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.08);
    --shadow-lg: 0 8px 30px rgba(0, 0, 0, 0.10);
    --shadow-xl: 0 12px 48px rgba(0, 0, 0, 0.15);
    --shadow-2xl: 0 24px 64px rgba(0, 0, 0, 0.12);
    
    /* ---- Transitions ---- */
    --transition-fast: 0.15s ease;
    --transition-base: 0.3s ease;
    --transition-slow: 0.5s ease;
    --transition-bounce: 0.3s cubic-bezier(0.34, 1.56, 0.64, 1);
    
    /* ---- Container Widths ---- */
    --container-sm: 640px;
    --container-md: 768px;
    --container-lg: 1024px;
    --container-xl: 1280px;
    --container-2xl: 1440px;
    
    /* ---- Z-Index Layers ---- */
    --z-dropdown: 1000;
    --z-sticky: 1020;
    --z-fixed: 1030;
    --z-modal: 1040;
    --z-popover: 1050;
    --z-tooltip: 1060;
    --z-toast: 1070;
    --z-loader: 9999;
}

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

html {
    scroll-behavior: smooth;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: var(--font-primary);
    font-size: var(--text-base);
    color: var(--color-gray-700);
    background: var(--color-gray-50);
    line-height: 1.6;
    overflow-x: hidden;
}

/* ============================================
   TYPOGRAPHY
   ============================================ */
h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-primary);
    font-weight: 700;
    line-height: 1.2;
    color: var(--color-gray-900);
    margin-bottom: var(--spacing-md);
}

h1 { font-size: var(--text-5xl); }
h2 { font-size: var(--text-4xl); }
h3 { font-size: var(--text-3xl); }
h4 { font-size: var(--text-2xl); }
h5 { font-size: var(--text-xl); }
h6 { font-size: var(--text-lg); }

p {
    margin-bottom: var(--spacing-md);
    color: var(--color-gray-600);
}

a {
    color: var(--color-primary);
    text-decoration: none;
    transition: var(--transition-base);
}

a:hover {
    color: var(--color-primary-dark);
}

/* ============================================
   CONTAINERS
   ============================================ */
.container {
    max-width: var(--container-xl);
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
}

.container-fluid {
    width: 100%;
    padding: 0 var(--spacing-lg);
}

/* ============================================
   GRID SYSTEM
   ============================================ */
.row {
    display: grid;
    grid-template-columns: repeat(12, 1fr);
    gap: var(--spacing-lg);
}

.col-1 { grid-column: span 1; }
.col-2 { grid-column: span 2; }
.col-3 { grid-column: span 3; }
.col-4 { grid-column: span 4; }
.col-5 { grid-column: span 5; }
.col-6 { grid-column: span 6; }
.col-7 { grid-column: span 7; }
.col-8 { grid-column: span 8; }
.col-9 { grid-column: span 9; }
.col-10 { grid-column: span 10; }
.col-11 { grid-column: span 11; }
.col-12 { grid-column: span 12; }

/* ============================================
   SECTION SPACING
   ============================================ */
.section {
    padding: var(--spacing-3xl) 0;
}

.section-sm {
    padding: var(--spacing-2xl) 0;
}

.section-lg {
    padding: var(--spacing-4xl) 0;
}

.section-title {
    text-align: center;
    margin-bottom: var(--spacing-2xl);
}

.section-title h2 {
    font-size: var(--text-4xl);
    color: var(--color-gray-900);
    margin-bottom: var(--spacing-sm);
}

.section-title h2::after {
    content: '';
    display: block;
    width: 60px;
    height: 3px;
    background: linear-gradient(135deg, var(--color-secondary), var(--color-primary));
    margin: var(--spacing-sm) auto 0;
    border-radius: var(--radius-sm);
}

.section-title p {
    max-width: 600px;
    margin: var(--spacing-md) auto 0;
    color: var(--color-gray-500);
    word-wrap: break-word;
    overflow-wrap: break-word;
    padding: 0 15px;
}

/* ============================================
   BACKGROUND COLORS
   ============================================ */
.bg-white { background: var(--color-white); }
.bg-gray { background: var(--color-gray-50); }
.bg-primary { background: var(--color-primary); color: var(--color-white); }
.bg-secondary { background: var(--color-secondary); color: var(--color-white); }
.bg-accent { background: var(--color-accent); color: var(--color-white); }
.bg-dark { background: var(--color-gray-900); color: var(--color-white); }

.bg-gradient-primary {
    background: linear-gradient(135deg, var(--color-primary), var(--color-primary-dark));
    color: var(--color-white);
}

.bg-gradient-secondary {
    background: linear-gradient(135deg, var(--color-secondary), var(--color-secondary-dark));
    color: var(--color-white);
}

.bg-gradient-hero {
    background: linear-gradient(135deg, rgba(0, 51, 102, 0.9), rgba(0, 34, 68, 0.95));
    color: var(--color-white);
}

/* ============================================
   TEXT COLORS
   ============================================ */
.text-primary { color: var(--color-primary); }
.text-secondary { color: var(--color-secondary); }
.text-accent { color: var(--color-accent); }
.text-white { color: var(--color-white); }
.text-dark { color: var(--color-gray-900); }
.text-gray { color: var(--color-gray-500); }
.text-muted { color: var(--color-gray-400); }

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

.mt-1 { margin-top: var(--spacing-sm); }
.mt-2 { margin-top: var(--spacing-md); }
.mt-3 { margin-top: var(--spacing-lg); }
.mt-4 { margin-top: var(--spacing-xl); }
.mt-5 { margin-top: var(--spacing-2xl); }

.mb-1 { margin-bottom: var(--spacing-sm); }
.mb-2 { margin-bottom: var(--spacing-md); }
.mb-3 { margin-bottom: var(--spacing-lg); }
.mb-4 { margin-bottom: var(--spacing-xl); }
.mb-5 { margin-bottom: var(--spacing-2xl); }

.p-1 { padding: var(--spacing-sm); }
.p-2 { padding: var(--spacing-md); }
.p-3 { padding: var(--spacing-lg); }
.p-4 { padding: var(--spacing-xl); }
.p-5 { padding: var(--spacing-2xl); }

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

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

.hidden { display: none !important; }
.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    border: 0;
}

/* ============================================
   CUSTOM SCROLLBAR
   ============================================ */
::-webkit-scrollbar {
    width: 10px;
}
::-webkit-scrollbar-track {
    background: var(--color-gray-100);
    border-radius: var(--radius-full);
}
::-webkit-scrollbar-thumb {
    background: linear-gradient(135deg, var(--color-secondary), var(--color-primary));
    border-radius: var(--radius-full);
}
::-webkit-scrollbar-thumb:hover {
    background: linear-gradient(135deg, var(--color-secondary-dark), var(--color-primary-dark));
}

* {
    scrollbar-width: thin;
    scrollbar-color: var(--color-secondary) var(--color-gray-100);
}

/* ============================================
   RESPONSIVE HELPERS
   ============================================ */
@media (max-width: 1200px) {
    .container { max-width: 1024px; }
}

@media (max-width: 992px) {
    .container { max-width: 768px; }
    .row { gap: var(--spacing-md); }
}

@media (max-width: 768px) {
    .container { padding: 0 var(--spacing-md); }
    .row { gap: var(--spacing-md); }
    
    h1 { font-size: var(--text-3xl); }
    h2 { font-size: var(--text-2xl); }
    h3 { font-size: var(--text-xl); }
    .section-title h2 { font-size: var(--text-2xl); }
    .section { padding: var(--spacing-2xl) 0; }
}

@media (max-width: 576px) {
    .container { padding: 0 var(--spacing-sm); }
    .row { gap: var(--spacing-sm); }
    
    .section-title h2 { font-size: var(--text-xl); }
    .section-title p { font-size: var(--text-sm); }
}