body {
    font-family: 'Inter', sans-serif;
}

.title-font {
    font-family: 'Playfair Display', serif;
}

.title-underline {
    border-bottom: 3px solid #7dd3fc; 
    display: inline-block;
    padding-bottom: 4px;
}

.table-header {
    background-color: #1e3a8a; 
    color: white;
    font-weight: bold;
}

.table-row-even {
    background-color: white;
    color: black;
}

.table-row-odd {
    background-color: #bbf7d0; 
    color: black;
}

.material-card {
    background: linear-gradient(135deg, #ffffff 0%, #f8fafc 100%);
    border: 1px solid #e2e8f0;
    border-radius: 12px;
    padding: 1.5rem;
    transition: all 0.3s ease;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.05);
}

.material-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.1);
    border-color: #3b82f6;
}

.video-container {
    position: relative;
    width: 100%;
    height: 0;
    padding-bottom: 56.25%; 
    border-radius: 8px;
    overflow: hidden;
}

.video-container iframe {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
}

.link-card {
    display: block;
    text-decoration: none;
    color: inherit;
}

.link-card:hover {
    text-decoration: none;
    color: inherit;
}

.category-icon {
    width: 48px;
    height: 48px;
    background: linear-gradient(135deg, #3b82f6 0%, #1d4ed8 100%);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 1rem;
}