/* Dinosaur Encyclopedia - Custom CSS */

/* CSS Variables */
:root {
    /* Primary Colors - Dinosaur Theme */
    --primary-green: #2d5016;
    --primary-light: #4a7c2e;
    --primary-dark: #1a2f0d;
    --accent-amber: #ff6b35;
    --accent-orange: #ff8c42;
    --earth-brown: #8b4513;
    --stone-gray: #696969;
    
    /* Secondary Colors */
    --secondary-blue: #1e3a8a;
    --sky-blue: #87ceeb;
    --sunset-red: #dc2626;
    --sunset-orange: #f97316;
    
    /* Neutral Colors */
    --white: #ffffff;
    --gray-50: #f9fafb;
    --gray-100: #f3f4f6;
    --gray-200: #e5e7eb;
    --gray-300: #d1d5db;
    --gray-400: #9ca3af;
    --gray-500: #6b7280;
    --gray-600: #4b5563;
    --gray-700: #374151;
    --gray-800: #1f2937;
    --gray-900: #111827;
    --black: #000000;
    
    /* Background Gradients */
    --bg-primary: linear-gradient(135deg, var(--primary-green) 0%, var(--primary-light) 100%);
    --bg-secondary: linear-gradient(135deg, var(--secondary-blue) 0%, var(--sky-blue) 100%);
    --bg-accent: linear-gradient(135deg, var(--accent-amber) 0%, var(--accent-orange) 100%);
    --bg-sunset: linear-gradient(135deg, var(--sunset-red) 0%, var(--sunset-orange) 100%);
    
    /* Typography */
    --font-family-primary: 'Segoe UI', system-ui, -apple-system, sans-serif;
    --font-family-display: 'Trebuchet MS', 'Arial Black', sans-serif;
    --font-family-monospace: 'Courier New', monospace;
    
    /* Spacing */
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-2xl: 3rem;
    --spacing-3xl: 4rem;
    
    /* Border Radius */
    --radius-sm: 0.25rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    --radius-2xl: 1.5rem;
    --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);
    
    /* Transitions */
    --transition-fast: 0.15s ease;
    --transition-normal: 0.3s ease;
    --transition-slow: 0.5s ease;
    
    /* Z-index */
    --z-dropdown: 1000;
    --z-sticky: 1020;
    --z-fixed: 1030;
    --z-modal-backdrop: 1040;
    --z-modal: 1050;
    --z-popover: 1060;
    --z-tooltip: 1070;
}

/* Dark Mode Variables */
@media (prefers-color-scheme: dark) {
    :root {
        --bg-primary: linear-gradient(135deg, #0f172a 0%, #1e293b 100%);
        --text-primary: var(--gray-100);
        --text-secondary: var(--gray-300);
        --bg-card: var(--gray-800);
        --bg-secondary: var(--gray-700);
    }
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-family-primary);
    line-height: 1.6;
    color: var(--gray-800);
    background-color: var(--gray-50);
    overflow-x: hidden;
}

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

h1 { font-size: 3rem; }
h2 { font-size: 2.5rem; }
h3 { font-size: 2rem; }
h4 { font-size: 1.5rem; }
h5 { font-size: 1.25rem; }
h6 { font-size: 1rem; }

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

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

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

/* Header & Navigation */
.header {
    background: var(--bg-primary);
    box-shadow: var(--shadow-md);
    position: sticky;
    top: 0;
    z-index: var(--z-sticky);
    backdrop-filter: blur(10px);
}

.navbar-brand {
    font-family: var(--font-family-display);
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--white) !important;
    text-decoration: none;
    transition: transform var(--transition-fast);
}

.navbar-brand:hover {
    transform: scale(1.05);
    color: var(--white) !important;
}

.nav-link {
    color: var(--gray-100) !important;
    font-weight: 500;
    transition: all var(--transition-fast);
    position: relative;
}

.nav-link:hover {
    color: var(--accent-orange) !important;
    transform: translateY(-2px);
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 50%;
    width: 0;
    height: 2px;
    background: var(--accent-orange);
    transition: all var(--transition-fast);
    transform: translateX(-50%);
}

.nav-link:hover::after {
    width: 100%;
}

/* Hero Section */
.hero-section {
    background: var(--bg-secondary);
    background-image: url('../images/backgrounds/jurassic-bg.jpg');
    background-size: cover;
    background-position: center;
    background-attachment: fixed;
    position: relative;
    min-height: 70vh;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}

.hero-section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.4);
    z-index: 1;
}

.hero-content {
    position: relative;
    z-index: 2;
    text-align: center;
    color: var(--white);
    padding: var(--spacing-3xl);
}

.hero-title {
    font-size: 3.5rem;
    font-weight: 800;
    margin-bottom: var(--spacing-lg);
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.5);
    animation: fadeInDown 1s ease;
}

.hero-subtitle {
    font-size: 1.5rem;
    margin-bottom: var(--spacing-2xl);
    opacity: 0.9;
    animation: fadeInUp 1s ease 0.3s both;
}

/* Dinosaur Cards */
.dinosaur-card {
    background: var(--white);
    border-radius: var(--radius-xl);
    overflow: hidden;
    box-shadow: var(--shadow-lg);
    transition: all var(--transition-normal);
    position: relative;
    height: 100%;
    display: flex;
    flex-direction: column;
}

.dinosaur-card:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-2xl);
}

.dinosaur-card-image {
    position: relative;
    height: 250px;
    overflow: hidden;
    background: var(--gray-200);
}

.dinosaur-card-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform var(--transition-slow);
}

.dinosaur-card:hover .dinosaur-card-image img {
    transform: scale(1.1);
}

.dinosaur-card-content {
    padding: var(--spacing-lg);
    flex: 1;
    display: flex;
    flex-direction: column;
}

.dinosaur-card-title {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary-dark);
    margin-bottom: var(--spacing-sm);
}

.dinosaur-card-period {
    display: inline-block;
    background: var(--bg-accent);
    color: var(--white);
    padding: var(--spacing-xs) var(--spacing-md);
    border-radius: var(--radius-full);
    font-size: 0.875rem;
    font-weight: 600;
    margin-bottom: var(--spacing-md);
}

.dinosaur-card-description {
    color: var(--gray-600);
    flex: 1;
    margin-bottom: var(--spacing-md);
}

.dinosaur-card-footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: var(--spacing-md);
    border-top: 1px solid var(--gray-200);
}

.dinosaur-card-diet {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    font-size: 0.875rem;
    color: var(--gray-500);
}

.diet-icon {
    width: 20px;
    height: 20px;
    border-radius: var(--radius-full);
}

.diet-icon.herbivore {
    background: var(--primary-green);
}

.diet-icon.carnivore {
    background: var(--sunset-red);
}

.diet-icon.omnivore {
    background: var(--accent-amber);
}

/* Buttons */
.btn-dino-primary {
    background: var(--bg-primary);
    color: var(--white);
    border: none;
    padding: var(--spacing-md) var(--spacing-xl);
    border-radius: var(--radius-md);
    font-weight: 600;
    transition: all var(--transition-fast);
    text-decoration: none;
    display: inline-block;
    text-align: center;
    cursor: pointer;
}

.btn-dino-primary:hover {
    background: var(--primary-light);
    color: var(--white);
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.btn-dino-secondary {
    background: var(--bg-accent);
    color: var(--white);
    border: none;
    padding: var(--spacing-md) var(--spacing-xl);
    border-radius: var(--radius-md);
    font-weight: 600;
    transition: all var(--transition-fast);
    text-decoration: none;
    display: inline-block;
    text-align: center;
    cursor: pointer;
}

.btn-dino-secondary:hover {
    background: var(--sunset-orange);
    color: var(--white);
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

/* Search & Filters */
.search-container {
    background: var(--white);
    border-radius: var(--radius-xl);
    padding: var(--spacing-2xl);
    box-shadow: var(--shadow-md);
    margin-bottom: var(--spacing-2xl);
}

.search-input {
    border: 2px solid var(--gray-200);
    border-radius: var(--radius-md);
    padding: var(--spacing-md) var(--spacing-lg);
    font-size: 1rem;
    transition: all var(--transition-fast);
    width: 100%;
}

.search-input:focus {
    outline: none;
    border-color: var(--primary-light);
    box-shadow: 0 0 0 3px rgba(74, 124, 46, 0.1);
}

.filter-dropdown {
    border: 2px solid var(--gray-200);
    border-radius: var(--radius-md);
    padding: var(--spacing-md);
    transition: all var(--transition-fast);
}

.filter-dropdown:focus {
    outline: none;
    border-color: var(--primary-light);
    box-shadow: 0 0 0 3px rgba(74, 124, 46, 0.1);
}

/* Dinosaur Detail Page */
.dinosaur-detail-header {
    background: var(--bg-primary);
    color: var(--white);
    padding: var(--spacing-3xl) 0;
    position: relative;
    overflow: hidden;
}

.dinosaur-detail-header::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('../images/backgrounds/cretaceous-bg.jpg');
    background-size: cover;
    background-position: center;
    opacity: 0.3;
    z-index: 1;
}

.dinosaur-detail-content {
    position: relative;
    z-index: 2;
}

.dinosaur-detail-title {
    font-size: 3rem;
    font-weight: 800;
    margin-bottom: var(--spacing-md);
}

.dinosaur-detail-subtitle {
    font-size: 1.5rem;
    font-style: italic;
    opacity: 0.8;
    margin-bottom: var(--spacing-xl);
}

.dinosaur-info-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-2xl);
}

.dinosaur-info-card {
    background: var(--white);
    padding: var(--spacing-lg);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
    text-align: center;
    transition: transform var(--transition-fast);
}

.dinosaur-info-card:hover {
    transform: translateY(-5px);
}

.dinosaur-info-label {
    font-size: 0.875rem;
    color: var(--gray-500);
    margin-bottom: var(--spacing-xs);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.dinosaur-info-value {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--primary-dark);
}

/* Image Gallery */
.gallery-container {
    background: var(--white);
    border-radius: var(--radius-xl);
    padding: var(--spacing-2xl);
    box-shadow: var(--shadow-md);
    margin-bottom: var(--spacing-2xl);
}

.gallery-main-image {
    width: 100%;
    height: 500px;
    object-fit: cover;
    border-radius: var(--radius-lg);
    margin-bottom: var(--spacing-lg);
}

.gallery-thumbnails {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(100px, 1fr));
    gap: var(--spacing-sm);
}

.gallery-thumbnail {
    width: 100%;
    height: 80px;
    object-fit: cover;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all var(--transition-fast);
    border: 2px solid transparent;
}

.gallery-thumbnail:hover,
.gallery-thumbnail.active {
    border-color: var(--primary-light);
    transform: scale(1.05);
}

/* Footer */
.footer {
    background: var(--primary-dark);
    color: var(--gray-300);
    padding: var(--spacing-3xl) 0 var(--spacing-lg);
    margin-top: var(--spacing-3xl);
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-2xl);
    margin-bottom: var(--spacing-2xl);
}

.footer-section h3 {
    color: var(--white);
    font-size: 1.25rem;
    margin-bottom: var(--spacing-md);
}

.footer-section ul {
    list-style: none;
    padding: 0;
}

.footer-section ul li {
    margin-bottom: var(--spacing-sm);
}

.footer-section a {
    color: var(--gray-400);
    transition: color var(--transition-fast);
}

.footer-section a:hover {
    color: var(--accent-orange);
}

.footer-bottom {
    border-top: 1px solid var(--gray-700);
    padding-top: var(--spacing-lg);
    text-align: center;
    color: var(--gray-400);
}

/* Responsive Design */
@media (max-width: 1200px) {
    .hero-title { font-size: 3rem; }
    .hero-subtitle { font-size: 1.25rem; }
    .dinosaur-detail-title { font-size: 2.5rem; }
}

@media (max-width: 992px) {
    .hero-title { font-size: 2.5rem; }
    .hero-subtitle { font-size: 1.125rem; }
    .dinosaur-detail-title { font-size: 2rem; }
    .dinosaur-info-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 768px) {
    .hero-title { font-size: 2rem; }
    .hero-subtitle { font-size: 1rem; }
    .dinosaur-detail-title { font-size: 1.75rem; }
    .dinosaur-info-grid { grid-template-columns: 1fr; }
    .footer-content { grid-template-columns: 1fr; }
    .gallery-main-image { height: 300px; }
}

@media (max-width: 576px) {
    .hero-content { padding: var(--spacing-xl); }
    .hero-title { font-size: 1.5rem; }
    .hero-subtitle { font-size: 0.875rem; }
    .dinosaur-detail-title { font-size: 1.5rem; }
    .dinosaur-card-image { height: 200px; }
    .gallery-thumbnails { grid-template-columns: repeat(3, 1fr); }
}

/* Accessibility */
.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;
}

.focus-visible {
    outline: 2px solid var(--accent-amber);
    outline-offset: 2px;
}

/* Print Styles */
@media print {
    .header, .footer, .btn, .gallery-thumbnails {
        display: none !important;
    }
    
    .dinosaur-card {
        break-inside: avoid;
        box-shadow: none;
        border: 1px solid var(--gray-300);
    }
    
    body {
        background: var(--white);
        color: var(--black);
    }
}