body {
    background: linear-gradient(135deg, #f8f9fa 0%, #e9ecef 100%);
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}

.header {
    background: linear-gradient(135deg, #007bff 0%, #0056b3 100%);
    color: white;
    padding: 1.5rem 0;
    margin-bottom: 2rem;
    box-shadow: 0 4px 15px rgba(0, 123, 255, 0.2);
}

.form-container {
    background: white;
    border-radius: 12px;
    padding: 2rem;
    margin-bottom: 2rem;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
    border: 1px solid #e9ecef;
}

.form-control,
.form-select {
    border-radius: 8px;
    border: 2px solid #e9ecef;
    padding: 10px 15px;
    transition: all 0.3s ease;
}

.form-control:focus,
.form-select:focus {
    border-color: #007bff;
    box-shadow: 0 0 0 0.2rem rgba(0, 123, 255, 0.15);
}

.btn-primary {
    background: linear-gradient(135deg, #007bff 0%, #0056b3 100%);
    border: none;
    border-radius: 8px;
    padding: 10px 25px;
    font-weight: 600;
    transition: all 0.3s ease;
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(0, 123, 255, 0.3);
}

.btn-danger {
    background: linear-gradient(135deg, #dc3545 0%, #c82333 100%);
    border: none;
    border-radius: 6px;
    transition: all 0.3s ease;
}

.btn-danger:hover {
    transform: translateY(-1px);
    box-shadow: 0 4px 15px rgba(220, 53, 69, 0.3);
}

.table-container {
    background: white;
    border-radius: 12px;
    overflow: hidden;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
    border: 1px solid #e9ecef;
}

.table thead th {
    background: linear-gradient(135deg, #007bff 0%, #0056b3 100%);
    color: white;
    border: none;
    padding: 15px;
    font-weight: 600;
}

.table tbody tr {
    transition: all 0.2s ease;
}

.table tbody tr:hover {
    background-color: #f8f9ff;
    transform: scale(1.005);
}

.table tbody td {
    padding: 12px 15px;
    vertical-align: middle;
}

.course-badge {
    padding: 6px 12px;
    border-radius: 15px;
    font-size: 0.85rem;
    font-weight: 600;
}

.course-fsd {
    background: linear-gradient(135deg, #007bff, #0056b3);
    color: white;
}

.course-uiux {
    background: linear-gradient(135deg, #28a745, #1e7e34);
    color: white;
}

.course-aiml {
    background: linear-gradient(135deg, #ffc107, #e0a800);
    color: #212529;
}

.empty-message {
    text-align: center;
    padding: 3rem;
    color: #6c757d;
}

.empty-message i {
    font-size: 3rem;
    margin-bottom: 1rem;
    opacity: 0.5;
}

.student-id {
    background: #e9ecef;
    padding: 4px 8px;
    border-radius: 4px;
    font-weight: 600;
    font-size: 0.9rem;
}

.fade-in {
    animation: fadeIn 0.4s ease-in;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(10px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}