/* ===== GLOBAL STYLES - RESPONSIVE FOUNDATION ===== */

/* CSS Custom Properties for consistent theming */
:root {
    /* Color palette */
    --primary-color: #0066cc;
    --secondary-color: #67b52b;
    --accent-color: #ff4444;
    --text-primary: #333333;
    --text-secondary: #777777;
    --text-muted: #999999;
    --bg-primary: #ffffff;
    --bg-secondary: #f5f5f5;
    --bg-tertiary: #f8f9fa;
    --border-color: #e0e0e0;
    --shadow-light: rgba(0, 0, 0, 0.05);
    --shadow-medium: rgba(0, 0, 0, 0.1);
    --shadow-dark: rgba(0, 0, 0, 0.2);
    
    /* Typography */
    --font-family-primary: 'Roboto', -apple-system, BlinkMacSystemFont, 'Segoe UI', Oxygen, Ubuntu, Cantarell, sans-serif;
    --font-family-secondary: 'Roboto Slab', Georgia, serif;
    --font-weight-light: 300;
    --font-weight-normal: 400;
    --font-weight-medium: 500;
    --font-weight-bold: 700;
    
    /* Spacing */
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-xxl: 3rem;
    
    /* Border radius */
    --radius-sm: 0.25rem;
    --radius-md: 0.375rem;
    --radius-lg: 0.5rem;
    --radius-xl: 0.75rem;
    
    /* Transitions */
    --transition-fast: 0.15s ease;
    --transition-normal: 0.3s ease;
    --transition-slow: 0.5s ease;
    
    /* Z-index scale */
    --z-dropdown: 1000;
    --z-sticky: 1020;
    --z-fixed: 1030;
    --z-modal-backdrop: 1040;
    --z-modal: 1050;
    --z-popover: 1060;
    --z-tooltip: 1070;
}

/* Dark mode color overrides */
@media (prefers-color-scheme: dark) {
    :root {
        --text-primary: #e0e0e0;
        --text-secondary: #b0b0b0;
        --text-muted: #888888;
        --bg-primary: #1a1a1a;
        --bg-secondary: #2a2a2a;
        --bg-tertiary: #333333;
        --border-color: #404040;
        --shadow-light: rgba(255, 255, 255, 0.05);
        --shadow-medium: rgba(255, 255, 255, 0.1);
        --shadow-dark: rgba(255, 255, 255, 0.2);
    }
}

/* Base typography and layout */
html {
    font-size: 16px;
    line-height: 1.5;
    -webkit-text-size-adjust: 100%;
    -ms-text-size-adjust: 100%;
    -webkit-tap-highlight-color: transparent;
    scroll-behavior: smooth;
}

@media (prefers-reduced-motion: reduce) {
    html {
        scroll-behavior: auto;
    }
}

body {
    font-family: 'Roboto', sans-serif;
    background-color: #ffffff;
    color: #333;
    line-height: 1.6;
    margin: 0;
    margin-top: 40px; /* Space for fixed green header */
    padding: 0;
    overflow-x: hidden;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    /* Ensure header elements are visible and not cut off */
    position: relative;
    padding-top: 0; /* Ensure no default padding pushes content down */
}

/* Ensure main content area takes available space */
#main-content {
    flex: 1;
}

/* Responsive typography scale */
h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-family-primary);
    font-weight: var(--font-weight-medium);
    line-height: 1.2;
    margin-top: 0;
    margin-bottom: var(--spacing-md);
    color: var(--text-primary);
}

h1 { 
    font-size: clamp(1.75rem, 5vw, 3rem);
    font-weight: var(--font-weight-bold);
}

h2 { 
    font-size: clamp(1.5rem, 4vw, 2.5rem);
    font-weight: var(--font-weight-bold);
}

h3 { 
    font-size: clamp(1.25rem, 3vw, 2rem);
}

h4 { 
    font-size: clamp(1.125rem, 2.5vw, 1.5rem);
}

h5 { 
    font-size: clamp(1rem, 2vw, 1.25rem);
}

h6 { 
    font-size: clamp(0.875rem, 1.5vw, 1.125rem);
}

p, li, span, div {
    font-size: clamp(0.875rem, 1.2vw, 1rem);
    line-height: 1.6;
    margin-bottom: var(--spacing-md);
}

/* Link styles */
a {
    color: var(--primary-color);
    text-decoration: none;
    transition: color var(--transition-fast);
}

a:hover, a:focus {
    color: var(--accent-color);
    text-decoration: underline;
}

a:focus {
    outline: 2px solid var(--primary-color);
    outline-offset: 2px;
}

/* Button base styles */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-sm) var(--spacing-md);
    border: 1px solid transparent;
    border-radius: var(--radius-md);
    font-family: inherit;
    font-size: clamp(0.875rem, 1vw, 1rem);
    font-weight: var(--font-weight-medium);
    line-height: 1.4;
    text-align: center;
    text-decoration: none;
    cursor: pointer;
    transition: all var(--transition-fast);
    min-height: 44px; /* Touch-friendly */
    user-select: none;
}

.btn:focus {
    outline: 2px solid var(--primary-color);
    outline-offset: 2px;
}

.btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

/* Form elements */
input, textarea, select {
    font-family: inherit;
    font-size: clamp(0.875rem, 1vw, 1rem);
    line-height: 1.4;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: var(--spacing-sm) var(--spacing-md);
    background-color: var(--bg-primary);
    color: var(--text-primary);
    transition: border-color var(--transition-fast);
    min-height: 44px; /* Touch-friendly */
}

input:focus, textarea:focus, select:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 2px rgba(0, 102, 204, 0.2);
}

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

/* Screen reader only content */
.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;
}

/* Skip link for accessibility */
.skip-link {
    position: absolute;
    top: -40px;
    left: 6px;
    background: var(--bg-primary);
    color: var(--text-primary);
    padding: 8px;
    text-decoration: none;
    border-radius: var(--radius-md);
    z-index: var(--z-tooltip);
}

.skip-link:focus {
    top: 6px;
}

/* Focus management */
.focus-trap {
    outline: none;
}

/* Smooth scrolling for anchors */
@media (prefers-reduced-motion: no-preference) {
    html {
        scroll-behavior: smooth;
    }
}

/* High contrast mode support */
@media (prefers-contrast: high) {
    :root {
        --border-color: #000000;
        --shadow-light: rgba(0, 0, 0, 0.8);
        --shadow-medium: rgba(0, 0, 0, 0.9);
        --shadow-dark: rgba(0, 0, 0, 1);
    }
    
    .btn, input, textarea, select {
        border-width: 2px;
    }
}

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

/* Print styles */
@media print {
    :root {
        --bg-primary: white;
        --bg-secondary: white;
        --bg-tertiary: white;
        --text-primary: black;
        --text-secondary: black;
        --border-color: black;
    }
    
    body {
        background: white !important;
        color: black !important;
        font-size: 12pt;
        line-height: 1.4;
    }
    
    .btn {
        border: 1px solid black;
        background: white;
        color: black;
    }
    
    a {
        color: black;
        text-decoration: underline;
    }
    
    h1, h2, h3, h4, h5, h6 {
        page-break-after: avoid;
        color: black;
    }
    
    img {
        max-width: 100% !important;
        page-break-inside: avoid;
    }
}

/* Container queries support (progressive enhancement) */
@supports (container-type: inline-size) {
    .responsive-container {
        container-type: inline-size;
    }
    
    @container (max-width: 300px) {
        .responsive-text {
            font-size: 0.8rem;
        }
    }
    
    @container (min-width: 600px) {
        .responsive-text {
            font-size: 1.1rem;
        }
    }
}

/* Modern layout support */
@supports (display: grid) {
    .grid-container {
        display: grid;
        gap: var(--spacing-md);
    }
}

@supports (display: flex) {
    .flex-container {
        display: flex;
        gap: var(--spacing-md);
    }
}

/* Animation performance */
.animate {
    will-change: transform, opacity;
    backface-visibility: hidden;
    perspective: 1000px;
}

/* Loading states */
.loading {
    pointer-events: none;
    opacity: 0.7;
}

.loading::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 20px;
    height: 20px;
    margin: -10px 0 0 -10px;
    border: 2px solid var(--border-color);
    border-top-color: var(--primary-color);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

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

/* Custom scrollbar (webkit browsers) */
::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}

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

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

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

/* Selection styles */
::selection {
    background-color: var(--primary-color);
    color: white;
}

::-moz-selection {
    background-color: var(--primary-color);
    color: white;
}

/* Global Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

/* Ensure main container has white background */
.page-body-container-bs {
    background-color: #ffffff;
}

/* Container wrapper for consistent white background */
.container {
    background-color: transparent;
}