/**
 * Resource Pages Design System
 * Shared styles for all resource pages
 */

:root {
    /* Brand Colors */
    --color-primary: #4A90E2;
    --color-primary-dark: #357ABD;
    --color-primary-light: #6BA3E8;
    --color-secondary: #2ECC71;
    --color-accent: #9B59B6;
    --color-warning: #F39C12;
    --color-danger: #E74C3C;
    
    /* Background Colors */
    --bg-primary: #07152a;
    --bg-secondary: #0d1f3a;
    --bg-card: rgba(255, 255, 255, 0.03);
    --bg-card-hover: rgba(255, 255, 255, 0.05);
    --bg-glass: rgba(255, 255, 255, 0.08);
    
    /* Text Colors */
    --text-primary: #ffffff;
    --text-secondary: rgba(255, 255, 255, 0.8);
    --text-tertiary: rgba(255, 255, 255, 0.6);
    --text-muted: rgba(255, 255, 255, 0.4);
    
    /* Border Colors */
    --border-primary: rgba(74, 144, 226, 0.2);
    --border-secondary: rgba(255, 255, 255, 0.1);
    --border-accent: rgba(74, 144, 226, 0.4);
    
    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;
    --spacing-2xl: 4rem;
    
    /* Border Radius */
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 24px;
    
    /* Shadows */
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.1);
    --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.15);
    --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.2);
    --shadow-glow: 0 0 20px rgba(74, 144, 226, 0.3);
    
    /* Transitions */
    --transition-fast: 0.15s ease;
    --transition-base: 0.3s ease;
    --transition-slow: 0.5s ease;
    
    /* Typography */
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-size-xs: 0.75rem;
    --font-size-sm: 0.875rem;
    --font-size-base: 1rem;
    --font-size-lg: 1.125rem;
    --font-size-xl: 1.25rem;
    --font-size-2xl: 1.5rem;
    --font-size-3xl: 2rem;
    --font-size-4xl: 2.5rem;
    --font-size-5xl: 3rem;
    
    /* Z-index layers */
    --z-base: 1;
    --z-sticky: 10;
    --z-dropdown: 20;
    --z-modal: 30;
    --z-tooltip: 40;
}

/* Base Resource Page Layout */
.resource-page {
    min-height: 100vh;
    background: linear-gradient(180deg, var(--bg-primary) 0%, var(--bg-secondary) 100%);
    color: var(--text-primary);
    padding-top: 80px;
    position: relative;
    overflow-x: hidden;
}

.resource-page::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: 
        radial-gradient(circle at 20% 80%, rgba(74, 158, 255, 0.1) 0%, transparent 50%),
        radial-gradient(circle at 80% 20%, rgba(46, 204, 113, 0.1) 0%, transparent 50%),
        radial-gradient(circle at 50% 50%, rgba(91, 181, 255, 0.08) 0%, transparent 70%);
    z-index: -2;
    animation: backgroundPulse 20s ease-in-out infinite;
    pointer-events: none;
}

@keyframes backgroundPulse {
    0%, 100% { opacity: 1; transform: scale(1); }
    50% { opacity: 0.9; transform: scale(1.05); }
}

.resource-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: var(--spacing-lg) var(--spacing-md);
    position: relative;
    z-index: var(--z-base);
}

/* Header Styles */
.resource-header {
    text-align: center;
    margin-bottom: var(--spacing-2xl);
    padding: var(--spacing-xl) var(--spacing-lg);
    background: var(--bg-glass);
    backdrop-filter: blur(20px);
    border-radius: var(--radius-lg);
    border: 1px solid var(--border-primary);
    box-shadow: var(--shadow-md);
    animation: fadeInUp 0.6s ease-out;
}

.resource-header h1 {
    font-size: var(--font-size-5xl);
    font-weight: 900;
    margin-bottom: var(--spacing-md);
    background: linear-gradient(135deg, var(--text-primary) 0%, var(--color-primary) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    line-height: 1.2;
}

.resource-header p {
    font-size: var(--font-size-xl);
    color: var(--text-secondary);
    line-height: 1.8;
    max-width: 800px;
    margin: 0 auto;
}

/* Content Cards */
.resource-card {
    background: var(--bg-glass);
    backdrop-filter: blur(20px);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    border: 1px solid var(--border-primary);
    margin-bottom: var(--spacing-lg);
    transition: all var(--transition-base);
    animation: fadeIn 0.6s ease-out;
}

.resource-card:hover {
    background: var(--bg-card-hover);
    border-color: var(--border-accent);
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg), var(--shadow-glow);
}

.resource-card h2 {
    font-size: var(--font-size-3xl);
    font-weight: 700;
    margin: 0 0 var(--spacing-md) 0;
    color: var(--color-primary);
    border-bottom: 2px solid var(--border-primary);
    padding-bottom: var(--spacing-sm);
}

.resource-card h3 {
    font-size: var(--font-size-2xl);
    font-weight: 600;
    margin: var(--spacing-lg) 0 var(--spacing-sm) 0;
    color: var(--color-secondary);
}

.resource-card h4 {
    font-size: var(--font-size-xl);
    font-weight: 600;
    margin: var(--spacing-md) 0 var(--spacing-xs) 0;
    color: var(--text-primary);
}

.resource-card p {
    margin-bottom: var(--spacing-md);
    color: var(--text-secondary);
    font-size: var(--font-size-base);
    line-height: 1.8;
}

.resource-card ul,
.resource-card ol {
    margin: var(--spacing-md) 0;
    padding-left: var(--spacing-xl);
    color: var(--text-secondary);
}

.resource-card li {
    margin-bottom: var(--spacing-sm);
    line-height: 1.8;
}

.resource-card a {
    color: var(--color-primary-light);
    text-decoration: none;
    border-bottom: 1px solid transparent;
    transition: all var(--transition-fast);
}

.resource-card a:hover {
    color: var(--color-primary);
    border-bottom-color: var(--color-primary);
}

/* Key Takeaways Box */
.key-takeaways {
    background: linear-gradient(135deg, rgba(74, 144, 226, 0.1) 0%, rgba(46, 204, 113, 0.1) 100%);
    border-left: 4px solid var(--color-primary);
    padding: var(--spacing-lg);
    border-radius: var(--radius-md);
    margin: var(--spacing-xl) 0;
}

.key-takeaways h3 {
    margin-top: 0;
    color: var(--color-primary);
}

.key-takeaways ul {
    list-style: none;
    padding-left: 0;
}

.key-takeaways li {
    padding-left: var(--spacing-lg);
    position: relative;
}

.key-takeaways li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: var(--color-secondary);
    font-weight: bold;
}

/* Info Boxes */
.info-box {
    background: rgba(74, 144, 226, 0.1);
    border: 1px solid var(--border-primary);
    border-radius: var(--radius-md);
    padding: var(--spacing-md);
    margin: var(--spacing-lg) 0;
}

.info-box.warning {
    background: rgba(243, 156, 18, 0.1);
    border-color: rgba(243, 156, 18, 0.3);
}

.info-box.success {
    background: rgba(46, 204, 113, 0.1);
    border-color: rgba(46, 204, 113, 0.3);
}

.info-box.danger {
    background: rgba(231, 76, 60, 0.1);
    border-color: rgba(231, 76, 60, 0.3);
}

/* Buttons */
.btn {
    display: inline-block;
    padding: var(--spacing-sm) var(--spacing-lg);
    background: var(--color-primary);
    color: var(--text-primary);
    border: none;
    border-radius: var(--radius-md);
    font-size: var(--font-size-base);
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition-base);
    text-decoration: none;
}

.btn:hover {
    background: var(--color-primary-dark);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.btn-secondary {
    background: transparent;
    border: 2px solid var(--color-primary);
    color: var(--color-primary);
}

.btn-secondary:hover {
    background: var(--color-primary);
    color: var(--text-primary);
}

/* Animations */
@keyframes fadeIn {
    from {
        opacity: 0;
    }
    to {
        opacity: 1;
    }
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.fade-in {
    animation: fadeIn 0.6s ease-out;
}

.fade-in-up {
    animation: fadeInUp 0.6s ease-out;
}

/* Responsive Design */
@media (max-width: 768px) {
    .resource-header h1 {
        font-size: var(--font-size-3xl);
    }
    
    .resource-header p {
        font-size: var(--font-size-lg);
    }
    
    .resource-container {
        padding: var(--spacing-md) var(--spacing-sm);
    }
    
    .resource-card {
        padding: var(--spacing-md);
    }
    
    .resource-card h2 {
        font-size: var(--font-size-2xl);
    }
    
    .table-of-contents {
        position: relative;
        top: 0;
        max-height: none;
        margin-bottom: var(--spacing-lg);
    }
    
    .share-buttons {
        flex-direction: column;
    }
    
    .share-btn {
        width: 100%;
        justify-content: center;
    }
    
    .related-resources {
        grid-template-columns: 1fr !important;
    }
    
    .back-to-top {
        bottom: var(--spacing-md);
        right: var(--spacing-md);
        width: 45px;
        height: 45px;
        font-size: var(--font-size-lg);
    }
}

@media (max-width: 480px) {
    .resource-header h1 {
        font-size: var(--font-size-2xl);
    }
    
    .resource-content {
        padding: var(--spacing-sm);
    }
    
    h2 {
        font-size: var(--font-size-xl);
    }
    
    h3 {
        font-size: var(--font-size-lg);
    }
}

/* Touch Device Enhancements */
@media (hover: none) and (pointer: coarse) {
    .share-btn,
    .related-resources a {
        min-height: 44px; /* Minimum touch target size */
    }
    
    .table-of-contents a {
        min-height: 40px;
        display: flex;
        align-items: center;
    }
}

/* High Contrast Mode Support */
@media (prefers-contrast: high) {
    .table-of-contents,
    .quiz-container,
    .tool-container {
        border-width: 2px;
    }
    
    a, button {
        text-decoration: underline;
    }
}

/* 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;
        scroll-behavior: auto !important;
    }
}

/* Print Styles */
@media print {
    .resource-page::before {
        display: none;
    }
    
    .resource-card {
        background: white;
        color: black;
        border: 1px solid #ccc;
        page-break-inside: avoid;
    }
    
    .table-of-contents,
    .share-buttons,
    .back-to-top,
    .reading-progress,
    .quiz-container,
    .tool-container {
        display: none !important;
    }
    
    a {
        color: #000 !important;
        text-decoration: underline !important;
    }
    
    h1, h2, h3, h4, h5, h6 {
        color: #000 !important;
        page-break-after: avoid;
    }
}