.navbar-custom {
    background: linear-gradient(135deg, #1e3c72 0%, #2a5298 50%, #1e3c72 100%);
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.15);
    padding: 0.5rem 1rem;
}

.navbar-custom .navbar-brand {
    font-size: 1.4rem;
    font-weight: 700;
    color: #ffffff;
    text-shadow: 1px 1px 2px rgba(0, 0, 0, 0.2);
    letter-spacing: 1px;
}

.navbar-custom .navbar-brand:hover {
    color: #f0f0f0;
}

.navbar-custom .navbar-nav .nav-link {
    color: rgba(255, 255, 255, 0.9);
    font-weight: 500;
    padding: 0.75rem 1rem;
    margin: 0 0.25rem;
    border-radius: 8px;
    transition: all 0.3s ease;
    position: relative;
}

.navbar-custom .navbar-nav .nav-link:hover {
    color: #ffffff;
    background: rgba(255, 255, 255, 0.1);
    transform: translateY(-2px);
}

.navbar-custom .navbar-nav .nav-link.active {
    color: #ffffff;
    background: rgba(255, 255, 255, 0.15);
    box-shadow: inset 0 2px 4px rgba(0, 0, 0, 0.1);
}

.navbar-custom .navbar-nav .nav-link.active::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 60%;
    height: 3px;
    background: linear-gradient(90deg, #ffd700, #ffec8b);
    border-radius: 3px;
}

.navbar-custom .navbar-collapse {
    justify-content: flex-end;
}

body {
    background: linear-gradient(135deg, #f5f7fa 0%, #e4e8ec 100%);
    min-height: 100vh;
}

.dashboard-card {
    height: 240px;
    display: flex;
    flex-direction: column;
    justify-content: space-around;
    padding: 1.25rem;
}

.dashboard-card .exam-name {
    font-size: 1.8rem;
    font-weight: 700;
    line-height: 1.3;
    margin: 0.5rem 0;
}

.card {
    border: none;
    border-radius: 12px;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.08);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.card:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.12);
}

.card-header {
    background: linear-gradient(135deg, #f8f9fa 0%, #e9ecef 100%);
    border-bottom: 1px solid rgba(0, 0, 0, 0.05);
    border-radius: 12px 12px 0 0 !important;
    font-weight: 600;
}

.btn-primary {
    background: linear-gradient(135deg, #2a5298 0%, #1e3c72 100%);
    border: none;
    border-radius: 8px;
    padding: 0.5rem 1.5rem;
    font-weight: 500;
    transition: all 0.3s ease;
}

.btn-primary:hover {
    background: linear-gradient(135deg, #3a62a8 0%, #2e4c82 100%);
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(42, 82, 152, 0.4);
}

.btn-success {
    background: linear-gradient(135deg, #28a745 0%, #1e7e34 100%);
    border: none;
    border-radius: 8px;
    font-weight: 500;
    transition: all 0.3s ease;
}

.btn-success:hover {
    background: linear-gradient(135deg, #38b755 0%, #2e8e44 100%);
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(40, 167, 69, 0.4);
}

.btn-danger {
    background: linear-gradient(135deg, #dc3545 0%, #c82333 100%);
    border: none;
    border-radius: 8px;
    font-weight: 500;
    transition: all 0.3s ease;
}

.btn-danger:hover {
    background: linear-gradient(135deg, #ec4555 0%, #d83343 100%);
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(220, 53, 69, 0.4);
}

.form-select, .form-control {
    border-radius: 8px;
    border: 1px solid #e0e0e0;
    transition: all 0.3s ease;
}

.form-select:focus, .form-control:focus {
    border-color: #2a5298;
    box-shadow: 0 0 0 3px rgba(42, 82, 152, 0.1);
}

.table {
    background: white;
    border-radius: 8px;
    overflow: hidden;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.06);
}

.table th {
    background: linear-gradient(135deg, #f8f9fa 0%, #e9ecef 100%);
    font-weight: 600;
    border-bottom: 2px solid #dee2e6;
}

.table-striped tbody tr:nth-of-type(odd) {
    background-color: rgba(42, 82, 152, 0.02);
}

.table-hover tbody tr:hover {
    background-color: rgba(42, 82, 152, 0.06);
}