* {
    font-family: 'Tajawal', sans-serif;
}

body {
    background-color: var(--color-bg-page);
    
}

/* =================== Search Bar =================== */
.search-bar {
    background: white;
    border-radius: var(--radius-md);
    padding: 12px 20px;
    display: flex;
    align-items: center;
    gap: 12px;
    box-shadow: var(--shadow-sm);
    margin-bottom: 30px;
    border: 2px solid transparent;
    transition: border-color 0.3s;
}

.search-bar:focus-within {
    border-color: var(--color-secondary);
}

.search-bar i {
    color: var(--color-text-grey);
    font-size: 16px;
}

.search-bar input {
    border: none;
    outline: none;
    flex: 1;
    font-size: 15px;
    font-family: 'Tajawal', sans-serif;
    background: transparent;
}

.search-bar input::placeholder {
    color: #adb5bd;
}

/* =================== Categories Grid =================== */
.categories-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
}

/* =================== Category Card =================== */
.category-card {
    background: white;
    border-radius: 14px;
    overflow: hidden;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.04);
    border: 2px solid transparent;
    transition: all 0.3s;
}

.category-card:hover {
    border-color: var(--color-secondary);
    transform: translateY(-3px);
    box-shadow: 0 8px 25px rgba(72, 202, 228, 0.12);
}

.category-link {
    display: block;
    text-decoration: none;
    padding: 22px;
}

.category-header {
    display: flex;
    align-items: center;
    gap: 16px;
}

.category-icon {
    width: 52px;
    height: 52px;
    border-radius: var(--radius-md);
    background: linear-gradient(135deg, rgba(72, 202, 228, 0.1), rgba(44, 75, 121, 0.1));
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.category-icon i {
    font-size: 1.3rem;
    color: var(--color-primary);
}

.category-info h3 {
    font-size: 1rem;
    font-weight: 700;
    color: #2c3e50;
    margin: 0 0 4px;
}

.books-count {
    font-size: 13px;
    color: var(--color-secondary);
    font-weight: 600;
}

/* =================== Toggle Button =================== */
.category-toggle {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 10px 22px;
    background: var(--color-bg-light);
    cursor: pointer;
    border-top: 1px solid var(--color-border-light);
    transition: background 0.3s;
    font-size: 13px;
    color: var(--color-text-grey);
    font-weight: 500;
}

.category-toggle:hover {
    background: #f0f4f8;
    color: var(--color-primary);
}

.category-toggle i {
    font-size: 12px;
    transition: transform 0.3s;
}

/* =================== Children Container =================== */
.children-container {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.4s ease;
    background: #fafbfc;
}

.children-container.open {
    max-height: 500px;
}

.child-item {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 10px 22px;
    text-decoration: none;
    color: #495057;
    font-size: 14px;
    border-top: 1px solid var(--color-border-light);
    transition: all 0.2s;
}

.child-item:hover {
    background: #e8f8f5;
    color: var(--color-primary);
    padding-right: 28px;
}

.child-item i {
    color: var(--color-secondary);
    font-size: 11px;
}

.child-item span:first-of-type {
    flex: 1;
}

.child-count {
    background: var(--color-border);
    color: var(--color-text-grey);
    font-size: 12px;
    padding: 2px 8px;
    border-radius: 10px;
    font-weight: 600;
}

/* =================== Empty & No Results =================== */
.empty-state,
.no-results {
    text-align: center;
    padding: 60px 20px;
    grid-column: 1 / -1;
}

.empty-state i,
.no-results i {
    font-size: 3rem;
    color: var(--color-border-dark);
    margin-bottom: 16px;
    display: block;
}

.empty-state h3,
.no-results h3 {
    font-size: 1.2rem;
    color: #495057;
    margin-bottom: 8px;
}

.empty-state p,
.no-results p {
    color: var(--color-text-grey);
    font-size: 14px;
}

/* =================== Responsive =================== */
@media (max-width: 992px) {
    .categories-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 576px) {
    .hero-title {
        font-size: 1.8rem;
    }

    .categories-grid {
        grid-template-columns: 1fr;
    }

    .category-link {
        padding: 16px;
    }

    .category-icon {
        width: 44px;
        height: 44px;
    }

    .category-icon i {
        font-size: 1.1rem;
    }
}