/* ... (previous CSS code) ... */

/* Main Content Layout for Landing Page */
.category-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
    gap: 20px;
    padding: 20px;
    justify-items: center;
}

.category-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    text-align: center;
    text-decoration: none;
    color: var(--text-color);
    background-color: var(--card-background);
    padding: 20px;
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
    transition: transform 0.3s, box-shadow 0.3s;
    width: 100%;
    max-width: 150px;
}

.category-item:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 16px rgba(0, 0, 0, 0.15);
}

.icon {
    font-size: 3em;
    color: var(--primary-color);
    margin-bottom: 10px;
}

.category-name {
    font-size: 1em;
    font-weight: bold;
}

/* Styles for Subpages */
.subpage-header {
    text-align: center;
    padding: 20px;
    border-bottom: 2px solid var(--secondary-color);
}

.back-link {
    display: block;
    margin-bottom: 15px;
    text-decoration: none;
    color: var(--primary-color);
    font-weight: bold;
}