.grade-teacher-hero {
    border-radius: 24px;
    background: linear-gradient(135deg, #0f172a, #1e3a5f);
    color: white;
    padding: 24px;
    box-shadow: 0 18px 45px rgba(15, 23, 42, 0.18);
}
.grade-level-card {
    border: 1px solid #e5e7eb;
    border-radius: 22px;
    background: #fff;
    box-shadow: 0 12px 30px rgba(15, 23, 42, 0.06);
    overflow: hidden;
}
.grade-level-header {
    padding: 18px 20px;
    background: #f8fafc;
    border-bottom: 1px solid #e5e7eb;
}
.grade-class-card {
    border: 1px solid #e5e7eb;
    border-radius: 18px;
    padding: 16px;
    background: #fff;
    cursor: pointer;
    transition: 0.2s;
}
.grade-class-card:hover {
    transform: translateY(-3px);
    box-shadow: 0 15px 35px rgba(15, 23, 42, 0.12);
}