/* Page Header */
.page-header {
    /* background: linear-gradient(135deg, var(--bs-primary) 0%, var(--bs-primary) 100%); */
    background-image: linear-gradient(to right, #4facfe 0%, #00f2fe 100%);
    color: white;
    padding: 3rem 0;
    text-align: center;
}

.page-header > .container{
    margin-top: 100px;
}

.page-header h1 {
    font-size: 2.5rem;
    margin-bottom: 0.5rem;
}

.page-subtitle {
    font-size: 1.1rem;
    opacity: 0.9;
}

/* Subjects Grid */
.subjects-grid {
    padding: 3rem 0;
}

.subjects-list {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 2rem;
}

.subject-card {
    background-color: var(--bs-white);
    padding: 2rem;
    border-radius: 0.75rem;
    box-shadow: var(--bs-box-shadow);
    text-align: center;
    transition: transform 0.3s, box-shadow 0.3s;
}

.subject-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--bs-box-shadow-lg);
}

.subject-icon {
    font-size: 3.5rem;
    margin-bottom: 1rem;
}

.subject-card h3 {
    font-size: 1.5rem;
    margin-bottom: 0.75rem;
    color: var(--bs-dark);
}

.subject-card p {
    color: var(--bs-dark);
    margin-bottom: 1rem;
    line-height: 1.6;
}

.subject-meta {
    margin-bottom: 1.5rem;
    color: var(--bs-dark);
    font-size: 0.9rem;
}