/**
 * Custom CSS for FontHub - Font Showcase Website
 * Optimized for performance and accessibility
 */

/* Root Variables */
:root {
    --primary-color: #007bff;
    --secondary-color: #6c757d;
    --success-color: #28a745;
    --info-color: #17a2b8;
    --warning-color: #ffc107;
    --danger-color: #dc3545;
    --light-color: #f8f9fa;
    --dark-color: #343a40;
    --font-family-sans-serif: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    --font-family-monospace: 'Monaco', 'Consolas', 'Courier New', monospace;
    --border-radius: 0.375rem;
    --box-shadow: 0 0.125rem 0.25rem rgba(0, 0, 0, 0.075);
    --box-shadow-lg: 0 1rem 3rem rgba(0, 0, 0, 0.175);
    --transition: all 0.15s ease-in-out;
}

/* Base Styles */
body {
    font-family: var(--font-family-sans-serif);
    line-height: 1.6;
    color: var(--dark-color);
    background-color: #ffffff;
}

/* Typography Enhancements */
h1, h2, h3, h4, h5, h6 {
    font-weight: 600;
    line-height: 1.3;
    margin-bottom: 1rem;
}

.display-1, .display-2, .display-3, .display-4, .display-5, .display-6 {
    font-weight: 700;
    line-height: 1.2;
}

/* Layout Improvements */
.main-content {
    min-height: calc(100vh - 200px);
}

/* Hero Section */
.hero-section {
    background: linear-gradient(135deg, var(--primary-color) 0%, #0056b3 100%);
    position: relative;
    overflow: hidden;
}

.hero-section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><defs><pattern id="grain" width="100" height="100" patternUnits="userSpaceOnUse"><circle cx="50" cy="50" r="1" fill="white" opacity="0.1"/></pattern></defs><rect width="100" height="100" fill="url(%23grain)"/></svg>');
    opacity: 0.3;
}

.hero-typography {
    position: relative;
    z-index: 2;
}

.font-preview-large {
    font-size: 4rem;
    font-weight: 300;
    opacity: 0.9;
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

/* Font Cards */
.font-card {
    transition: var(--transition);
    border: none;
    border-radius: var(--border-radius);
    overflow: hidden;
    height: 100%;
}

.font-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--box-shadow-lg);
}

.font-preview-container {
    position: relative;
    height: 200px;
    overflow: hidden;
    background: linear-gradient(45deg, #f8f9fa 0%, #e9ecef 100%);
}

.font-preview-img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: var(--transition);
}

.font-card:hover .font-preview-img {
    transform: scale(1.05);
}

.font-preview-placeholder {
    height: 200px;
    background: linear-gradient(45deg, var(--light-color) 0%, #e9ecef 100%);
    display: flex;
    align-items: center;
    justify-content: center;
}

.font-preview-text {
    font-size: 3rem;
    font-weight: 300;
    color: var(--secondary-color);
    opacity: 0.8;
}

/* Font Meta Information */
.font-meta {
    font-size: 0.875rem;
    color: var(--secondary-color);
}

.font-tags .badge {
    font-size: 0.75rem;
    font-weight: 400;
    padding: 0.25rem 0.5rem;
    border-radius: 1rem;
}

.font-actions {
    display: flex;
    gap: 0.5rem;
    align-items: center;
}

/* Download Button Enhancements */
.download-btn {
    position: relative;
    overflow: hidden;
    transition: var(--transition);
}

.download-btn:hover {
    transform: translateY(-1px);
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.15);
}

.download-btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
    transition: left 0.5s;
}

.download-btn:hover::before {
    left: 100%;
}

/* Category Cards */
.category-card {
    transition: var(--transition);
    border: 1px solid #dee2e6;
    cursor: pointer;
}

.category-card:hover {
    border-color: var(--primary-color);
    box-shadow: var(--box-shadow);
    transform: translateY(-2px);
}

.category-icon {
    transition: var(--transition);
}

.category-card:hover .category-icon {
    transform: scale(1.1);
}

/* Font Detail Page */
.font-info-sidebar .card {
    border: none;
    box-shadow: var(--box-shadow);
    margin-bottom: 1.5rem;
}

.font-playground {
    background: #f8f9fa;
    border-radius: var(--border-radius);
    padding: 1.5rem;
}

.preview-output {
    background: #ffffff;
    border: 2px dashed #dee2e6;
    min-height: 120px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--border-radius);
}

.preview-text {
    text-align: center;
    word-break: break-word;
    font-family: inherit;
    color: var(--dark-color);
}

/* Search Enhancements */
.search-form .input-group {
    box-shadow: var(--box-shadow);
    border-radius: var(--border-radius);
    overflow: hidden;
}

.search-form .form-control {
    border: none;
    padding: 0.75rem 1rem;
    font-size: 1.1rem;
}

.search-form .form-control:focus {
    box-shadow: none;
    border-color: transparent;
}

.search-result-item mark {
    background-color: #fff3cd;
    padding: 0.1rem 0.2rem;
    border-radius: 0.25rem;
    font-weight: 600;
}

/* Empty States */
.empty-state {
    padding: 3rem 1rem;
    text-align: center;
}

.empty-state i {
    opacity: 0.5;
    margin-bottom: 1.5rem;
}

/* Navigation Enhancements */
.navbar-brand {
    font-weight: 700;
    font-size: 1.5rem;
    transition: var(--transition);
}

.navbar-brand:hover {
    transform: scale(1.05);
}

.navbar-nav .nav-link {
    font-weight: 500;
    padding: 0.5rem 1rem !important;
    border-radius: var(--border-radius);
    transition: var(--transition);
    margin: 0 0.25rem;
}

.navbar-nav .nav-link:hover {
    background-color: rgba(255, 255, 255, 0.1);
    transform: translateY(-1px);
}

/* Footer Enhancements */
footer {
    background: linear-gradient(135deg, var(--dark-color) 0%, #1a1a1a 100%);
}

.social-links a {
    display: inline-block;
    transition: var(--transition);
}

.social-links a:hover {
    transform: translateY(-2px) scale(1.1);
    color: var(--primary-color) !important;
}

/* Form Enhancements */
.form-control, .form-select {
    border: 1px solid #ced4da;
    border-radius: var(--border-radius);
    transition: var(--transition);
}

.form-control:focus, .form-select:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 0.2rem rgba(0, 123, 255, 0.25);
}

.form-check-input:checked {
    background-color: var(--primary-color);
    border-color: var(--primary-color);
}

/* Button Enhancements */
.btn {
    border-radius: var(--border-radius);
    font-weight: 500;
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.btn:hover {
    transform: translateY(-1px);
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary-color) 0%, #0056b3 100%);
    border-color: var(--primary-color);
}

.btn-primary:hover {
    background: linear-gradient(135deg, #0056b3 0%, #004494 100%);
    border-color: #0056b3;
}

/* Pagination */
.pagination .page-link {
    border-radius: var(--border-radius);
    margin: 0 0.125rem;
    border: 1px solid #dee2e6;
    transition: var(--transition);
}

.pagination .page-link:hover {
    transform: translateY(-1px);
    box-shadow: var(--box-shadow);
}

.pagination .page-item.active .page-link {
    background: linear-gradient(135deg, var(--primary-color) 0%, #0056b3 100%);
    border-color: var(--primary-color);
}

/* Breadcrumb */
.breadcrumb {
    background: transparent;
    padding: 0;
    margin-bottom: 1rem;
}

.breadcrumb-item a {
    color: var(--primary-color);
    text-decoration: none;
    transition: var(--transition);
}

.breadcrumb-item a:hover {
    color: #0056b3;
    text-decoration: underline;
}

/* Statistics Section */
.stat-item {
    padding: 1rem;
    transition: var(--transition);
}

.stat-item:hover {
    transform: translateY(-2px);
}

.stat-item h3 {
    font-size: 3rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
    background: linear-gradient(135deg, var(--primary-color) 0%, #0056b3 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* Timeline (About Page) */
.timeline {
    position: relative;
    padding-left: 2rem;
}

.timeline::before {
    content: '';
    position: absolute;
    left: 0.5rem;
    top: 0;
    bottom: 0;
    width: 2px;
    background: linear-gradient(to bottom, var(--primary-color), var(--light-color));
}

.timeline-marker {
    position: absolute;
    left: 0;
    width: 1rem;
    height: 1rem;
    border-radius: 50%;
    transform: translateX(-50%);
    border: 2px solid #ffffff;
    box-shadow: var(--box-shadow);
}

.timeline-content {
    padding-bottom: 1.5rem;
}

/* Lazy Loading */
.lazy {
    opacity: 0;
    transition: opacity 0.3s;
}

.lazy.loaded {
    opacity: 1;
}

/* Loading States */
.loading {
    pointer-events: none;
    opacity: 0.6;
}

.loading::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 20px;
    height: 20px;
    margin: -10px 0 0 -10px;
    border: 2px solid #f3f3f3;
    border-top: 2px solid var(--primary-color);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

/* Responsive Design */
@media (max-width: 768px) {
    .hero-section {
        text-align: center;
    }
    
    .font-preview-large {
        font-size: 2.5rem;
    }
    
    .hero-typography {
        margin-top: 2rem;
    }
    
    .font-actions {
        flex-direction: column;
        gap: 0.5rem;
    }
    
    .font-actions .btn {
        width: 100%;
    }
    
    .navbar-nav .nav-link {
        padding: 0.5rem 0 !important;
        margin: 0;
    }
    
    .search-form .input-group {
        margin-bottom: 1rem;
    }
    
    .stat-item h3 {
        font-size: 2rem;
    }
}

@media (max-width: 576px) {
    .display-4, .display-5, .display-6 {
        font-size: 1.75rem;
    }
    
    .font-preview-container {
        height: 150px;
    }
    
    .font-preview-text {
        font-size: 2rem;
    }
    
    .timeline {
        padding-left: 1.5rem;
    }
    
    .hero-section .container {
        padding-left: 1rem;
        padding-right: 1rem;
    }
}

/* Print Styles */
@media print {
    .navbar,
    .footer,
    .btn,
    .pagination {
        display: none !important;
    }
    
    .font-card {
        break-inside: avoid;
    }
    
    body {
        font-size: 12pt;
        line-height: 1.4;
    }
}

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

/* High Contrast Mode */
@media (prefers-contrast: high) {
    .font-card,
    .card {
        border: 2px solid var(--dark-color);
    }
    
    .btn-outline-primary {
        border-width: 2px;
    }
}

/* Focus Styles */
.btn:focus,
.form-control:focus,
.form-select:focus {
    outline: 2px solid var(--primary-color);
    outline-offset: 2px;
}

/* Skip Link */
.skip-link {
    position: absolute;
    top: -40px;
    left: 6px;
    background: var(--dark-color);
    color: white;
    padding: 8px;
    text-decoration: none;
    z-index: 1000;
}

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

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

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

::-webkit-scrollbar-thumb {
    background: var(--secondary-color);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--primary-color);
}