/* Learn Page Specific Styles */

/* Learn Hero Section */
.learn-hero-section {
    padding-top: 120px;
    padding-bottom: var(--spacing-xl);
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    color: var(--white);
    position: relative;
    overflow: hidden;
}

.learn-hero-section::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -20%;
    width: 80%;
    height: 150%;
    background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><text y=".9em" font-size="90" fill="rgba(255,255,255,0.1)">学</text></svg>') no-repeat center;
    background-size: contain;
    opacity: 0.1;
    transform: rotate(-15deg);
}

.learn-hero-section .container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--spacing-xl);
    flex-wrap: wrap;
}

.learn-hero-content {
    flex: 1;
    min-width: 350px;
    position: relative;
    z-index: 2;
}

.learn-hero-content h1 {
    font-size: 3rem;
    margin-bottom: var(--spacing-md);
    font-weight: 700;
    line-height: 1.2;
}

.learn-hero-content p {
    font-size: 1.2rem;
    margin-bottom: var(--spacing-xl);
    opacity: 0.9;
    line-height: 1.6;
    max-width: 500px;
}

.learn-hero-stats {
    display: flex;
    justify-content: flex-start;
    gap: var(--spacing-lg);
    flex-wrap: wrap;
    margin-bottom: var(--spacing-xl);
}

.learn-hero-stats .stat {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-xs);
    background-color: rgba(255, 255, 255, 0.1);
    padding: var(--spacing-md);
    border-radius: var(--border-radius-md);
    backdrop-filter: blur(10px);
    min-width: 120px;
}

.learn-hero-stats .stat i {
    font-size: 1.5rem;
    margin-bottom: var(--spacing-xs);
    color: var(--yuzu);
}

.learn-hero-stats .stat span {
    font-weight: 500;
    font-size: 0.9rem;
    text-align: center;
}

.learn-hero-cta {
    display: flex;
    gap: var(--spacing-md);
    flex-wrap: wrap;
}

.learn-hero-image {
    flex: 1;
    min-width: 350px;
    display: flex;
    justify-content: center;
    position: relative;
    z-index: 2;
}

.learn-hero-image img {
    max-width: 100%;
    border-radius: var(--border-radius-lg);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.2);
    transition: var(--transition-normal);
}

.learn-hero-image img:hover {
    transform: translateY(-10px);
    box-shadow: 0 30px 60px rgba(0, 0, 0, 0.3);
}

/* Learning Categories Section */
.learning-categories-section {
    padding: var(--spacing-xl) 0;
    background-color: var(--bg-secondary);
    position: relative;
}

.learning-categories-section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><circle cx="20" cy="20" r="2" fill="rgba(255,77,109,0.1)"/><circle cx="80" cy="40" r="3" fill="rgba(67,97,238,0.1)"/><circle cx="40" cy="80" r="2" fill="rgba(255,77,109,0.1)"/></svg>') repeat;
    opacity: 0.5;
    z-index: 0;
}

.learning-categories-section .container {
    position: relative;
    z-index: 1;
}

.learning-categories-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: var(--spacing-lg);
    margin-top: var(--spacing-xl);
}

.learning-category-card {
    background-color: var(--bg-primary);
    border-radius: var(--border-radius-lg);
    padding: var(--spacing-lg);
    box-shadow: var(--box-shadow);
    transition: var(--transition-normal);
    border: 1px solid var(--border-light);
    position: relative;
    overflow: hidden;
}

.learning-category-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 4px;
    background: linear-gradient(90deg, var(--primary-color), var(--secondary-color));
}

.learning-category-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--box-shadow-hover);
}

.category-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--spacing-md);
}

.category-icon {
    width: 60px;
    height: 60px;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--white);
    font-size: 1.5rem;
    box-shadow: 0 4px 12px rgba(255, 77, 109, 0.3);
}

.category-badge {
    padding: 4px 12px;
    border-radius: 20px;
    font-size: 0.8rem;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.category-badge.beginner {
    background-color: #d4edda;
    color: #155724;
}

.category-badge.intermediate {
    background-color: #fff3cd;
    color: #856404;
}

.category-badge.advanced {
    background-color: #f8d7da;
    color: #721c24;
}

.category-badge.all-levels {
    background-color: #d1ecf1;
    color: #0c5460;
}

.category-content h3 {
    font-size: 1.5rem;
    margin-bottom: var(--spacing-sm);
    color: var(--text-primary);
    font-family: var(--font-japanese);
}

.category-content p {
    color: var(--text-secondary);
    margin-bottom: var(--spacing-md);
    line-height: 1.6;
}

.category-features {
    margin-bottom: var(--spacing-md);
}

.category-features .feature {
    display: flex;
    align-items: center;
    margin-bottom: var(--spacing-sm);
    font-size: 0.9rem;
}

.category-features .feature i {
    margin-right: var(--spacing-sm);
    color: var(--secondary-color);
    font-size: 0.8rem;
}

.progress-section {
    margin-bottom: var(--spacing-md);
}

.progress-bar {
    width: 100%;
    height: 6px;
    background-color: var(--bg-secondary);
    border-radius: 3px;
    overflow: hidden;
    margin-bottom: var(--spacing-xs);
}

.progress-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--primary-color), var(--secondary-color));
    transition: width 0.3s ease;
    border-radius: 3px;
}

.progress-text {
    font-size: 0.8rem;
    color: var(--text-secondary);
}

.category-actions {
    display: flex;
    gap: var(--spacing-sm);
}

.category-actions .btn {
    flex: 1;
    padding: 10px 16px;
    font-size: 0.9rem;
}

.category-actions .btn-primary {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    border: none;
}

.category-actions .btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(255, 77, 109, 0.3);
}

.category-actions .btn-outline {
    background-color: transparent;
    color: var(--text-secondary);
    border: 1px solid var(--border-medium);
}

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

/* Grammar Section */
.grammar-section {
    padding: var(--spacing-xl) 0;
    background-color: var(--bg-primary);
    position: relative;
}

.grammar-section::before {
    content: '';
    position: absolute;
    top: 0;
    right: 0;
    width: 300px;
    height: 300px;
    background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><text y=".9em" font-size="90" fill="rgba(67,97,238,0.05)">文</text></svg>') no-repeat center;
    background-size: contain;
    opacity: 0.3;
}

.grammar-content {
    position: relative;
    z-index: 1;
}

.grammar-intro {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: var(--spacing-xl);
    align-items: center;
    margin-bottom: var(--spacing-xl);
    padding: var(--spacing-lg);
    background-color: var(--bg-secondary);
    border-radius: var(--border-radius-lg);
    border: 1px solid var(--border-light);
}

.grammar-intro-text h3 {
    font-size: 1.8rem;
    margin-bottom: var(--spacing-md);
    color: var(--text-primary);
}

.grammar-intro-text p {
    color: var(--text-secondary);
    margin-bottom: var(--spacing-lg);
    line-height: 1.6;
}

.grammar-benefits {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.grammar-benefits .benefit {
    display: flex;
    align-items: center;
    font-size: 0.9rem;
}

.grammar-benefits .benefit i {
    margin-right: var(--spacing-sm);
    color: var(--secondary-color);
    font-size: 1rem;
}

.grammar-intro-image {
    display: flex;
    justify-content: center;
}

.grammar-intro-image img {
    max-width: 100%;
    border-radius: var(--border-radius-md);
    box-shadow: var(--box-shadow);
}

.grammar-levels {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-xl);
}

.grammar-level-card {
    background-color: var(--bg-secondary);
    border-radius: var(--border-radius-lg);
    padding: var(--spacing-lg);
    box-shadow: var(--box-shadow-light);
    transition: var(--transition-normal);
    border: 1px solid var(--border-light);
    position: relative;
    overflow: hidden;
}

.grammar-level-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 3px;
    background: linear-gradient(90deg, var(--primary-color), var(--secondary-color));
}

.grammar-level-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--box-shadow-hover);
}

.level-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--spacing-md);
}

.level-header h3 {
    font-size: 1.3rem;
    color: var(--text-primary);
    margin-bottom: 0;
}

.level-badge {
    padding: 4px 12px;
    border-radius: 20px;
    font-size: 0.8rem;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.level-badge.beginner {
    background-color: #d4edda;
    color: #155724;
}

.level-badge.intermediate {
    background-color: #fff3cd;
    color: #856404;
}

.level-badge.advanced {
    background-color: #f8d7da;
    color: #721c24;
}

/* Trial Badge Style */
.level-badge.trial {
    background-color: #e7f3ff;
    color: #0066cc;
    font-weight: 600;
}

.level-content p {
    color: var(--text-secondary);
    margin-bottom: var(--spacing-md);
    line-height: 1.6;
}

.grammar-topics {
    margin-bottom: var(--spacing-md);
}

.grammar-topics .topic {
    display: flex;
    align-items: center;
    margin-bottom: var(--spacing-sm);
    font-size: 0.9rem;
    color: var(--text-secondary);
}

.grammar-topics .topic i {
    margin-right: var(--spacing-sm);
    color: var(--primary-color);
    font-size: 0.6rem;
}

.level-progress {
    margin-bottom: var(--spacing-md);
}

.level-progress .progress-bar {
    margin-bottom: var(--spacing-xs);
}

.level-progress .progress-text {
    font-size: 0.8rem;
    color: var(--text-secondary);
}

.level-actions {
    display: flex;
    gap: var(--spacing-sm);
}

.level-actions .btn {
    flex: 1;
    padding: 10px 16px;
    font-size: 0.9rem;
}

.level-actions .btn-primary {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    border: none;
}

.level-actions .btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(255, 77, 109, 0.3);
}

.level-actions .btn-outline {
    background-color: transparent;
    color: var(--text-secondary);
    border: 1px solid var(--border-medium);
}

.level-actions .btn-outline:hover {
    background-color: var(--bg-primary);
    color: var(--text-primary);
}

.grammar-cta {
    text-align: center;
    padding: var(--spacing-xl);
    background: linear-gradient(135deg, var(--secondary-color) 0%, var(--primary-color) 100%);
    border-radius: var(--border-radius-lg);
    color: var(--white);
    position: relative;
    overflow: hidden;
}

.grammar-cta::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -20%;
    width: 80%;
    height: 150%;
    background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><text y=".9em" font-size="90" fill="rgba(255,255,255,0.1)">語</text></svg>') no-repeat center;
    background-size: contain;
    opacity: 0.1;
    transform: rotate(15deg);
}

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

.cta-content h3 {
    font-size: 2rem;
    margin-bottom: var(--spacing-md);
}

.cta-content p {
    font-size: 1.1rem;
    margin-bottom: var(--spacing-lg);
    opacity: 0.9;
}

.cta-content .btn {
    background-color: var(--white);
    color: var(--secondary-color);
    border: none;
    padding: 14px 30px;
    font-size: 1.1rem;
}

.cta-content .btn:hover {
    background-color: var(--off-white);
    transform: translateY(-3px);
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.2);
}

/* Dark Mode Adjustments */
[data-theme="dark"] .category-badge.beginner {
    background-color: #1e4620;
    color: #a3d9a5;
}

[data-theme="dark"] .category-badge.intermediate {
    background-color: #4a3b00;
    color: #ffeb9c;
}

[data-theme="dark"] .category-badge.advanced {
    background-color: #4a1e23;
    color: #f5b7b1;
}

[data-theme="dark"] .category-badge.all-levels {
    background-color: #1e3d42;
    color: #a2d2ff;
}

[data-theme="dark"] .level-badge.beginner {
    background-color: #1e4620;
    color: #a3d9a5;
}

[data-theme="dark"] .level-badge.intermediate {
    background-color: #4a3b00;
    color: #ffeb9c;
}

[data-theme="dark"] .level-badge.advanced {
    background-color: #4a1e23;
    color: #f5b7b1;
}

/* Dark mode for trial badge */
[data-theme="dark"] .level-badge.trial {
    background-color: #1a365d;
    color: #63b3ed;
}

/* Responsive Design */
@media screen and (max-width: 991px) {
    .learn-hero-section .container {
        flex-direction: column;
        text-align: center;
    }
    
    .learn-hero-content {
        margin-bottom: var(--spacing-xl);
    }
    
    .learn-hero-content h1 {
        font-size: 2.5rem;
    }
    
    .learn-hero-stats {
        justify-content: center;
    }
    
    .grammar-intro {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .grammar-intro-image {
        order: -1;
    }
}

@media screen and (max-width: 768px) {
    .learning-categories-grid {
        grid-template-columns: 1fr;
    }
    
    .grammar-levels {
        grid-template-columns: 1fr;
    }
    
    .learn-hero-content h1 {
        font-size: 2rem;
    }
    
    .learn-hero-content p {
        font-size: 1rem;
    }
    
    .learn-hero-stats {
        flex-wrap: wrap;
        gap: var(--spacing-md);
    }
    
    .learn-hero-stats .stat {
        min-width: 100px;
    }
    
    .category-actions {
        flex-direction: column;
    }
    
    .level-actions {
        flex-direction: column;
    }
}

@media screen and (max-width: 576px) {
    .learn-hero-cta {
        flex-direction: column;
        gap: var(--spacing-sm);
    }
    
    .learning-category-card {
        padding: var(--spacing-md);
    }
    
    .grammar-level-card {
        padding: var(--spacing-md);
    }
    
    .learn-hero-stats {
        flex-direction: column;
        align-items: center;
    }
    
    .learn-hero-stats .stat {
        width: 100%;
        max-width: 200px;
    }
    
    .cta-content h3 {
        font-size: 1.5rem;
    }
    
    .cta-content p {
        font-size: 1rem;
    }
}

/* Animation for cards */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.learning-category-card,
.grammar-level-card {
    animation: fadeInUp 0.6s ease forwards;
}

.learning-category-card:nth-child(2) {
    animation-delay: 0.1s;
}

.learning-category-card:nth-child(3) {
    animation-delay: 0.2s;
}

.learning-category-card:nth-child(4) {
    animation-delay: 0.3s;
}

.learning-category-card:nth-child(5) {
    animation-delay: 0.4s;
}

.learning-category-card:nth-child(6) {
    animation-delay: 0.5s;
}

/* Hover effects for interactive elements */
.category-icon:hover {
    transform: scale(1.1) rotate(5deg);
    transition: var(--transition-normal);
}

.grammar-level-card:hover .level-badge {
    transform: scale(1.05);
    transition: var(--transition-normal);
}

/* Focus states for accessibility */
.btn:focus {
    outline: 2px solid var(--primary-color);
    outline-offset: 2px;
}

.learning-category-card:focus-within,
.grammar-level-card:focus-within {
    outline: 2px solid var(--primary-color);
    outline-offset: 2px;
}