/**
 * UKR Language Learning - Custom Styles
 * Additional styles for the theme
 */

/* ==========================================
   Additional Hero Styles
   ========================================== */
.hero-buttons {
    display: flex;
    gap: var(--spacing-md);
    justify-content: center;
    flex-wrap: wrap;
}

.flag-icon {
    font-size: 2rem;
}

/* ==========================================
   Viewed Lesson Indicator
   ========================================== */
.lesson-card.viewed {
    border-left-color: var(--success);
}

.lesson-card.viewed .lesson-number {
    background: var(--success);
}

/* ==========================================
   Code Blocks
   ========================================== */
pre {
    background: var(--gray-900);
    color: var(--gray-100);
    padding: var(--spacing-lg);
    border-radius: var(--radius-lg);
    overflow-x: auto;
    margin: var(--spacing-lg) 0;
}

code {
    font-family: 'Fira Code', 'Monaco', 'Consolas', monospace;
    font-size: 0.9rem;
}

:not(pre) > code {
    background: var(--gray-100);
    color: var(--gray-800);
    padding: 2px 6px;
    border-radius: var(--radius-sm);
}

/* ==========================================
   Vocabulary Lists
   ========================================== */
.vocabulary-list {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-md);
    margin: var(--spacing-lg) 0;
}

.vocabulary-item {
    background: var(--white);
    border: 1px solid var(--gray-200);
    border-radius: var(--radius-md);
    padding: var(--spacing-md);
    display: flex;
    justify-content: space-between;
    align-items: center;
    transition: all var(--transition-fast);
}

.vocabulary-item:hover {
    border-color: var(--ukr-blue);
    box-shadow: var(--shadow-sm);
}

.vocabulary-item .word {
    font-weight: 600;
    color: var(--ukr-blue-dark);
}

.vocabulary-item .translation {
    color: var(--gray-600);
    font-style: italic;
}

/* ==========================================
   Grammar Tables
   ========================================== */
.grammar-table {
    width: 100%;
    border-collapse: collapse;
    margin: var(--spacing-lg) 0;
    background: var(--white);
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
}

.grammar-table th {
    background: var(--ukr-blue);
    color: var(--white);
    padding: var(--spacing-md);
    text-align: left;
}

.grammar-table td {
    padding: var(--spacing-md);
    border-bottom: 1px solid var(--gray-200);
}

.grammar-table tr:hover td {
    background: var(--gray-50);
}

.grammar-table tr:last-child td {
    border-bottom: none;
}

/* ==========================================
   Audio Player
   ========================================== */
.audio-player {
    background: var(--gray-100);
    border-radius: var(--radius-lg);
    padding: var(--spacing-md);
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    margin: var(--spacing-md) 0;
}

.audio-player .play-btn {
    width: 50px;
    height: 50px;
    border-radius: var(--radius-full);
    background: var(--ukr-blue);
    color: var(--white);
    border: none;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    transition: all var(--transition-fast);
}

.audio-player .play-btn:hover {
    background: var(--ukr-blue-dark);
    transform: scale(1.05);
}

/* ==========================================
   Tip Boxes
   ========================================== */
.tip-box {
    padding: var(--spacing-lg);
    border-radius: var(--radius-lg);
    margin: var(--spacing-lg) 0;
    display: flex;
    gap: var(--spacing-md);
}

.tip-box.info {
    background: rgba(59, 130, 246, 0.1);
    border-left: 4px solid var(--info);
}

.tip-box.warning {
    background: rgba(245, 158, 11, 0.1);
    border-left: 4px solid var(--warning);
}

.tip-box.success {
    background: rgba(16, 185, 129, 0.1);
    border-left: 4px solid var(--success);
}

.tip-box .tip-icon {
    font-size: 1.5rem;
    flex-shrink: 0;
}

.tip-box .tip-content h4 {
    margin-top: 0;
    margin-bottom: var(--spacing-sm);
}

.tip-box .tip-content p:last-child {
    margin-bottom: 0;
}

/* ==========================================
   Lesson Progress
   ========================================== */
.lesson-progress {
    background: var(--gray-100);
    border-radius: var(--radius-md);
    padding: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
}

.lesson-progress-label {
    display: flex;
    justify-content: space-between;
    margin-bottom: var(--spacing-sm);
    font-size: 0.875rem;
    color: var(--gray-600);
}

.lesson-progress-bar {
    height: 8px;
    background: var(--gray-300);
    border-radius: var(--radius-full);
    overflow: hidden;
}

.lesson-progress-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--ukr-blue) 0%, var(--ukr-yellow) 100%);
    border-radius: var(--radius-full);
    transition: width var(--transition-normal);
}

/* ==========================================
   Flashcards
   ========================================== */
.flashcard-container {
    perspective: 1000px;
    margin: var(--spacing-lg) 0;
}

.flashcard {
    width: 100%;
    max-width: 400px;
    height: 250px;
    margin: 0 auto;
    cursor: pointer;
    position: relative;
    transform-style: preserve-3d;
    transition: transform 0.6s;
}

.flashcard.flipped {
    transform: rotateY(180deg);
}

.flashcard-front,
.flashcard-back {
    position: absolute;
    width: 100%;
    height: 100%;
    backface-visibility: hidden;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-xl);
    border-radius: var(--radius-xl);
    font-size: 1.5rem;
    font-weight: 600;
    text-align: center;
}

.flashcard-front {
    background: var(--ukr-blue);
    color: var(--white);
}

.flashcard-back {
    background: var(--ukr-yellow);
    color: var(--ukr-blue-dark);
    transform: rotateY(180deg);
}

.flashcard-hint {
    text-align: center;
    color: var(--gray-500);
    font-size: 0.875rem;
    margin-top: var(--spacing-md);
}

/* ==========================================
   Search Results
   ========================================== */
.search-results-header {
    padding: var(--spacing-xl) 0;
    background: var(--gray-50);
    margin-bottom: var(--spacing-xl);
}

.search-results-header h1 {
    margin: 0;
}

.search-results-header .search-query {
    color: var(--ukr-blue);
}

.search-form {
    display: flex;
    gap: var(--spacing-sm);
    max-width: 500px;
}

.search-form input[type="search"] {
    flex: 1;
    padding: var(--spacing-md);
    border: 2px solid var(--gray-300);
    border-radius: var(--radius-md);
    font-size: 1rem;
}

.search-form input[type="search"]:focus {
    border-color: var(--ukr-blue);
    outline: none;
}

/* ==========================================
   Pagination
   ========================================== */
.pagination {
    display: flex;
    justify-content: center;
    gap: var(--spacing-sm);
    margin-top: var(--spacing-2xl);
}

.pagination a,
.pagination span {
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--radius-md);
    text-decoration: none;
}

.pagination a {
    background: var(--gray-100);
    color: var(--gray-700);
}

.pagination a:hover {
    background: var(--ukr-blue);
    color: var(--white);
}

.pagination .current {
    background: var(--ukr-blue);
    color: var(--white);
}

/* ==========================================
   404 Page
   ========================================== */
.error-404 {
    text-align: center;
    padding: var(--spacing-3xl) 0;
}

.error-404 h1 {
    font-size: 8rem;
    color: var(--ukr-blue);
    margin: 0;
    line-height: 1;
}

.error-404 h2 {
    color: var(--gray-600);
    margin-bottom: var(--spacing-xl);
}

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

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

.animate-fade-in-up {
    animation: fadeInUp 0.5s ease forwards;
}

.animate-pulse {
    animation: pulse 2s ease infinite;
}

/* ==========================================
   Loading State
   ========================================== */
.loading {
    position: relative;
    pointer-events: none;
}

.loading::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 30px;
    height: 30px;
    margin: -15px 0 0 -15px;
    border: 3px solid var(--gray-300);
    border-top-color: var(--ukr-blue);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

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

/* ==========================================
   Dark Mode Support (Optional)
   ========================================== */
@media (prefers-color-scheme: dark) {
    /* Uncomment to enable dark mode
    :root {
        --white: #1a1a2e;
        --gray-50: #16213e;
        --gray-100: #1f2937;
        --gray-800: #e5e7eb;
        --gray-900: #f3f4f6;
    }
    */
}