/* Tamil Dictionary - Main Stylesheet */

/* CSS Variables */
:root {
    --primary-color: #0066cc;
    --secondary-color: #6c757d;
    --success-color: #28a745;
    --danger-color: #dc3545;
    --warning-color: #ffc107;
    --info-color: #17a2b8;
    --light-color: #f8f9fa;
    --dark-color: #343a40;
    
    --tamil-font: 'Noto Sans Tamil', Arial, sans-serif;
    --english-font: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    
    --border-radius: 0.375rem;
    --box-shadow: 0 0.125rem 0.25rem rgba(0, 0, 0, 0.075);
    --box-shadow-lg: 0 0.5rem 1rem rgba(0, 0, 0, 0.15);
    
    --transition: all 0.3s ease;
}

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

body {
    font-family: var(--english-font);
    line-height: 1.6;
    color: var(--dark-color);
    background-color: #ffffff;
}

/* Tamil Text Styling */
.tamil-word,
.tamil-text,
[lang="ta"] {
    font-family: var(--tamil-font);
    font-weight: 500;
    line-height: 1.8;
}

.tamil-word {
    font-size: 1.25em;
    color: var(--primary-color);
}

/* Header Styles */
.site-header {
    position: sticky;
    top: 0;
    z-index: 1000;
    background: white;
    box-shadow: var(--box-shadow);
}

.top-bar {
    font-size: 0.875rem;
}

.navbar-brand img {
    transition: var(--transition);
}

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

.navbar-nav .nav-link {
    font-weight: 500;
    transition: var(--transition);
    position: relative;
}

.navbar-nav .nav-link:hover,
.navbar-nav .nav-link.active {
    color: var(--primary-color) !important;
}

.navbar-nav .nav-link.active::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 30px;
    height: 2px;
    background-color: var(--primary-color);
}

/* Search Form */
.navbar .input-group {
    min-width: 250px;
}

.navbar .form-control {
    border-right: none;
}

.navbar .btn {
    border-left: none;
}

/* Hero Section */
.hero-section {
    background: linear-gradient(135deg, var(--primary-color) 0%, #004499 100%);
    position: relative;
    overflow: hidden;
}

.hero-section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('../images/pattern.svg') repeat;
    opacity: 0.1;
}

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

.hero-search .input-group {
    max-width: 500px;
}

.hero-stats .stat-item {
    text-align: center;
}

.hero-stats .h3 {
    font-weight: 700;
    margin-bottom: 0;
}

/* Cards */
.card {
    border: none;
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
    transition: var(--transition);
}

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

.card-header {
    background-color: transparent;
    border-bottom: 1px solid rgba(0, 0, 0, 0.125);
    font-weight: 600;
}

/* Word Cards */
.word-card {
    transition: var(--transition);
    border: 1px solid #e9ecef;
}

.word-card:hover {
    border-color: var(--primary-color);
    box-shadow: var(--box-shadow);
}

.word-result {
    transition: var(--transition);
}

.word-result:hover {
    box-shadow: var(--box-shadow-lg);
}

/* Alphabet Grid */
.alphabet-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(40px, 1fr));
    gap: 0.5rem;
    margin-bottom: 1rem;
}

.alphabet-link {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    background-color: var(--light-color);
    color: var(--dark-color);
    text-decoration: none;
    border-radius: var(--border-radius);
    font-family: var(--tamil-font);
    font-weight: 600;
    font-size: 1.1rem;
    transition: var(--transition);
}

.alphabet-link:hover {
    background-color: var(--primary-color);
    color: white;
    transform: scale(1.1);
}

.tamil-letter-link {
    font-family: var(--tamil-font);
    font-size: 1.1rem;
    font-weight: 600;
    transition: var(--transition);
}

.tamil-letter-link:hover {
    color: var(--primary-color) !important;
}

/* Feature Cards */
.feature-card {
    height: 100%;
    transition: var(--transition);
}

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

.feature-icon {
    width: 80px;
    height: 80px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 1rem;
}

/* Buttons */
.btn {
    font-weight: 500;
    border-radius: var(--border-radius);
    transition: var(--transition);
}

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

.btn-floating {
    position: fixed;
    bottom: 20px;
    right: 20px;
    width: 50px;
    height: 50px;
    border-radius: 50%;
    display: none;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    box-shadow: var(--box-shadow-lg);
}

.btn-floating.show {
    display: flex;
}

/* Forms */
.form-control {
    border-radius: var(--border-radius);
    transition: var(--transition);
}

.form-control:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 0.2rem rgba(0, 102, 204, 0.25);
}

/* Badges */
.badge {
    font-weight: 500;
}

/* Pagination */
.pagination .page-link {
    color: var(--primary-color);
    border-color: #dee2e6;
    transition: var(--transition);
}

.pagination .page-link:hover {
    color: white;
    background-color: var(--primary-color);
    border-color: var(--primary-color);
}

.pagination .page-item.active .page-link {
    background-color: var(--primary-color);
    border-color: var(--primary-color);
}

/* Breadcrumb */
.breadcrumb {
    background-color: transparent;
    padding: 0;
}

.breadcrumb-item + .breadcrumb-item::before {
    content: "›";
    font-weight: bold;
}

/* Footer */
.site-footer {
    margin-top: auto;
}

.social-links a {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background-color: rgba(255, 255, 255, 0.1);
    transition: var(--transition);
}

.social-links a:hover {
    background-color: rgba(255, 255, 255, 0.2);
    transform: translateY(-2px);
}

.tamil-alphabet-grid {
    display: grid;
    grid-template-columns: repeat(6, 1fr);
    gap: 0.5rem;
}

.tamil-letter-link {
    padding: 0.25rem;
    text-align: center;
    border-radius: var(--border-radius);
    transition: var(--transition);
}

.tamil-letter-link:hover {
    background-color: rgba(255, 255, 255, 0.1);
}

/* Word Details Page */
.word-header .display-4 {
    font-family: var(--tamil-font);
    font-weight: 600;
}

.pronunciation {
    font-style: italic;
}

.definition-content,
.translation-content,
.etymology-content {
    background-color: var(--light-color);
    border-left: 4px solid var(--primary-color);
}

.example-item {
    background-color: var(--light-color);
    border-left: 3px solid var(--info-color);
}

.word-stats .stat-item {
    padding: 0.5rem 0;
}

.rating-stars {
    display: flex;
    gap: 0.25rem;
}

.rating-stars input[type="radio"] {
    display: none;
}

.rating-stars .star-label {
    cursor: pointer;
    color: #ddd;
    font-size: 1.2rem;
    transition: var(--transition);
}

.rating-stars input[type="radio"]:checked ~ .star-label,
.rating-stars .star-label:hover {
    color: var(--warning-color);
}

/* Comments */
.comment-item {
    transition: var(--transition);
}

.comment-item:hover {
    background-color: rgba(0, 0, 0, 0.02);
    border-radius: var(--border-radius);
}

.comment-avatar {
    flex-shrink: 0;
}

/* Search Results */
.search-results .word-result {
    border-left: 4px solid transparent;
    transition: var(--transition);
}

.search-results .word-result:hover {
    border-left-color: var(--primary-color);
}

/* No Results */
.no-results {
    color: var(--secondary-color);
}

.no-results .fa-search {
    opacity: 0.3;
}

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

.spinner-border-sm {
    width: 1rem;
    height: 1rem;
}

/* Responsive Design */
@media (max-width: 768px) {
    .hero-section {
        text-align: center;
    }
    
    .hero-stats {
        justify-content: center;
        margin-top: 2rem;
    }
    
    .navbar .input-group {
        min-width: 200px;
    }
    
    .alphabet-grid {
        grid-template-columns: repeat(6, 1fr);
    }
    
    .feature-icon {
        width: 60px;
        height: 60px;
    }
    
    .word-header .display-4 {
        font-size: 2rem;
    }
    
    .btn-floating {
        bottom: 15px;
        right: 15px;
        width: 45px;
        height: 45px;
    }
}

@media (max-width: 576px) {
    .hero-section .display-4 {
        font-size: 2rem;
    }
    
    .hero-search .input-group {
        max-width: 100%;
    }
    
    .alphabet-grid {
        grid-template-columns: repeat(4, 1fr);
    }
    
    .tamil-alphabet-grid {
        grid-template-columns: repeat(4, 1fr);
    }
    
    .card-body {
        padding: 1rem;
    }
}

/* Print Styles */
@media print {
    .site-header,
    .site-footer,
    .btn,
    .pagination,
    .breadcrumb {
        display: none !important;
    }
    
    .card {
        box-shadow: none;
        border: 1px solid #ddd;
    }
    
    .word-header .display-4 {
        color: black !important;
    }
}

/* Dark Mode Support */
@media (prefers-color-scheme: dark) {
    :root {
        --dark-color: #f8f9fa;
        --light-color: #343a40;
    }
    
    body {
        background-color: #1a1a1a;
        color: var(--dark-color);
    }
    
    .card {
        background-color: #2d2d2d;
        color: var(--dark-color);
    }
    
    .navbar {
        background-color: #2d2d2d !important;
    }
    
    .form-control {
        background-color: #3d3d3d;
        border-color: #555;
        color: var(--dark-color);
    }
    
    .form-control:focus {
        background-color: #3d3d3d;
        border-color: var(--primary-color);
        color: var(--dark-color);
    }
}

/* Accessibility */
.skip-link {
    position: absolute;
    top: -40px;
    left: 6px;
    background: var(--dark-color);
    color: white;
    padding: 8px;
    text-decoration: none;
    border-radius: var(--border-radius);
    z-index: 1001;
}

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

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

/* High contrast mode */
@media (prefers-contrast: high) {
    .card {
        border: 2px solid var(--dark-color);
    }
    
    .btn {
        border-width: 2px;
    }
}

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

/* 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);
}

/* Animation Classes */
.fade-in {
    animation: fadeIn 0.5s ease-in;
}

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

.slide-up {
    animation: slideUp 0.5s ease-out;
}

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

/* Utility Classes */
.text-tamil {
    font-family: var(--tamil-font);
}

.bg-gradient-primary {
    background: linear-gradient(135deg, var(--primary-color) 0%, #004499 100%);
}

.border-primary {
    border-color: var(--primary-color) !important;
}

.shadow-hover {
    transition: var(--transition);
}

.shadow-hover:hover {
    box-shadow: var(--box-shadow-lg);
}

/* Word of the Day Special Styling */
.word-of-day {
    position: relative;
    overflow: hidden;
}

.word-of-day::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 4px;
    background: linear-gradient(90deg, var(--primary-color), var(--success-color));
}

/* Search Highlighting */
.search-highlight {
    background-color: yellow;
    padding: 0 2px;
    border-radius: 2px;
}

/* Loading Animation */
.loading-spinner {
    display: inline-block;
    width: 20px;
    height: 20px;
    border: 3px solid rgba(0, 102, 204, 0.3);
    border-radius: 50%;
    border-top-color: var(--primary-color);
    animation: spin 1s ease-in-out infinite;
}

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