/* ========================================
   Home Page CSS
   ======================================== */

.home-page {
    background: var(--bg-primary);
}

/* Home Container */
.home-container {
    display: flex;
    max-width: 1600px;
    margin: 0 auto;
    padding: var(--spacing-lg);
    gap: var(--spacing-xl);
}

/* Sidebar */
.sidebar {
    width: 280px;
    flex-shrink: 0;
    position: sticky;
    top: calc(var(--site-header-height) + 20px);
    height: fit-content;
}

.sidebar-title {
    font-size: 1rem;
    color: var(--text-secondary);
    margin-bottom: var(--spacing-md);
}

.category-nav {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-xl);
}

.category-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    padding: var(--spacing-md) var(--spacing-lg);
    border-radius: var(--border-radius-md);
    color: var(--text-secondary);
    transition: all var(--transition-fast);
}

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

.category-item.active {
    background: linear-gradient(135deg, var(--primary-color), var(--primary-dark));
    color: white;
}

.cat-icon {
    font-size: 1.3rem;
}

.sidebar-section {
    background: var(--bg-card);
    border-radius: var(--border-radius-lg);
    padding: var(--spacing-lg);
    margin-bottom: var(--spacing-lg);
    box-shadow: var(--shadow-sm);
}

.progress-stats {
    display: flex;
    gap: var(--spacing-md);
}

.stat-box {
    flex: 1;
    text-align: center;
    padding: var(--spacing-md);
    background: var(--bg-secondary);
    border-radius: var(--border-radius-md);
}

.stat-number {
    display: block;
    font-size: 1.8rem;
    font-weight: 700;
    color: var(--primary-color);
}

.stat-label {
    font-size: 0.85rem;
    color: var(--text-secondary);
}

.streak-display {
    text-align: center;
    padding: var(--spacing-md);
    background: linear-gradient(135deg, #FF8C42, #FF6B9D);
    border-radius: var(--border-radius-md);
    color: white;
}

.streak-number {
    display: block;
    font-size: 2.5rem;
    font-weight: 700;
}

.streak-label {
    font-size: 0.9rem;
    opacity: 0.9;
}

/* Main Content */
.main-content {
    flex: 1;
    min-width: 0;
}

.mobile-categories {
    display: none;
    margin-bottom: var(--spacing-lg);
}

.mobile-categories-header h3 {
    font-size: 1rem;
    color: var(--text-secondary);
    margin-bottom: var(--spacing-sm);
}

.mobile-categories-nav {
    display: flex;
    gap: var(--spacing-sm);
    overflow-x: auto;
    padding-bottom: var(--spacing-xs);
}

.mobile-categories-nav .category-item {
    flex-shrink: 0;
}

/* Daily Challenge */
.daily-challenge {
    background: linear-gradient(135deg, #667eea, #764ba2);
    border-radius: var(--border-radius-lg);
    padding: 14px 18px;
    margin-bottom: var(--spacing-lg);
    box-shadow: var(--shadow-lg);
}

.challenge-content {
    display: flex;
    align-items: center;
    gap: 12px;
    flex-wrap: wrap;
}

.challenge-icon {
    font-size: 2.2rem;
    filter: drop-shadow(0 2px 4px rgba(0, 0, 0, 0.2));
}

.challenge-text {
    flex: 1;
    min-width: 160px;
}

.challenge-text h3 {
    color: white;
    margin-bottom: 2px;
    font-size: 1.05rem;
}

.challenge-text p {
    color: rgba(255, 255, 255, 0.9);
    margin: 0;
    font-size: 0.9rem;
}

.challenge-progress {
    display: flex;
    align-items: center;
    gap: 10px;
    min-width: 170px;
}

.challenge-progress .progress-bar {
    flex: 1;
    height: 8px;
    background: rgba(255, 255, 255, 0.2);
}

.challenge-progress .progress-fill {
    background: var(--accent-yellow);
}

.progress-text {
    color: white;
    font-weight: 600;
    font-size: 0.82rem;
}

/* Books Section */
.books-section {
    margin-bottom: var(--spacing-xxl);
}

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

.section-title {
    font-size: 1.3rem;
    color: var(--text-primary);
}

.see-all {
    color: var(--primary-color);
    font-weight: 500;
}

/* Books Grid */
.books-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
    gap: var(--spacing-lg);
}

/* Book Card */
.book-card {
    background: var(--bg-card);
    border-radius: var(--border-radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    transition: all var(--transition-normal);
    cursor: pointer;
}

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

.book-card-cover {
    position: relative;
    aspect-ratio: 3/4;
    background: linear-gradient(135deg, var(--bg-secondary), var(--primary-light));
    overflow: hidden;
}

.book-card-cover img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.book-card-progress {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: rgba(0, 0, 0, 0.2);
}

.book-card-progress .progress-fill {
    background: var(--accent-green);
}

.book-card-info {
    padding: var(--spacing-md);
}

.book-card-title {
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: var(--spacing-xs);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.book-card-author {
    font-size: 0.85rem;
    color: var(--text-secondary);
    margin-bottom: var(--spacing-sm);
}

.book-card-tags {
    display: flex;
    gap: var(--spacing-xs);
    flex-wrap: wrap;
}

.book-tag {
    font-size: 0.75rem;
    padding: 2px 8px;
    background: var(--bg-secondary);
    border-radius: var(--border-radius-sm);
    color: var(--text-secondary);
}

/* Empty State */
.empty-state {
    text-align: center;
    padding: var(--spacing-xxl);
    color: var(--text-secondary);
}

.empty-icon {
    font-size: 4rem;
    display: block;
    margin-bottom: var(--spacing-md);
    opacity: 0.5;
}

/* Responsive */
@media (max-width: 1024px) {
    .sidebar {
        display: none;
    }

    .mobile-categories {
        display: block;
    }
}

@media (max-width: 768px) {
    .home-container {
        padding: var(--spacing-md);
    }

    .books-grid {
        grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
    }

    .challenge-content {
        flex-wrap: nowrap;
        align-items: center;
        text-align: left;
        gap: 8px;
    }

    .challenge-progress {
        width: 42%;
        min-width: 120px;
    }

    .challenge-icon {
        font-size: 1.7rem;
    }

    .challenge-text {
        min-width: 0;
    }

    .challenge-text h3 {
        font-size: 0.9rem;
        margin: 0;
    }

    .challenge-text p {
        display: none;
    }

    .daily-challenge {
        padding: 10px 12px;
    }
}