body {
    background-color: #f4f7fa;
    font-family: 'Arial', sans-serif;
}

h2 {
    margin-bottom: 30px;
    font-size: 24px;
    color: #343a40;
}

.table th, .table td {
    vertical-align: middle;
}

.table th {
    background-color: #007bff;
    color: white;
    font-weight: 600;
    text-align: center;
}

.table td {
    background-color: #ffffff;
    text-align: center;
    font-size: 14px;
}

.table-striped tbody tr:nth-of-type(odd) {
    background-color: #f9f9f9;
}

.table-striped tbody tr:nth-of-type(even) {
    background-color: #f1f1f1;
}

.table-striped tbody tr:hover {
    background-color: #e2e6ea;
    cursor: pointer;
    transition: background-color 0.3s;
}

.table-danger {
    background-color: #f8d7da;
}

.alert-warning {
    background-color: #fff3cd;
    border-color: #ffeeba;
    color: #856404;
}

.alert-warning ul {
    margin-bottom: 0;
    list-style: none;
    padding: 0;
}

.alert-warning li {
    font-size: 14px;
    margin-bottom: 12px;
}

.form-label {
    font-weight: 600;
    color: #343a40;
}

.form-control {
    border-radius: 8px;
    border: 1px solid #ced4da;
    font-size: 14px;
    padding: 10px;
}

.form-control:focus {
    border-color: #007bff;
    box-shadow: 0 0 0 0.25rem rgba(38, 143, 255, 0.5);
}

.btn {
    font-size: 14px;
    padding: 10px 15px;
    border-radius: 5px;
    font-weight: bold;
}

.btn-primary {
    background-color: #007bff;
    border-color: #007bff;
    color: white;
}

.btn-primary:hover {
    background-color: #0056b3;
    border-color: #004085;
}

.btn-success {
    background-color: #28a745;
    border-color: #28a745;
    color: white;
}

.btn-success:hover {
    background-color: #218838;
    border-color: #1e7e34;
}

.btn-sm {
    padding: 5px 10px;
    font-size: 12px;
}

.alert {
    font-size: 1rem;
    padding: 15px;
    margin-bottom: 20px;
    border-radius: 8px;
}

.alert-danger {
    background-color: #f8d7da;
    border-color: #f5c6cb;
    color: #721c24;
}

.card {
    background-color: #fff;
    border-radius: 8px;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    padding: 20px;
    margin-bottom: 30px;
}

.card-header {
    font-size: 18px;
    font-weight: 600;
    color: #007bff;
    border-bottom: 2px solid #007bff;
    margin-bottom: 10px;
}

.card-body {
    padding: 0;
}

.card-body .alert {
    margin-bottom: 10px;
}

.table-responsive {
    overflow-x: auto;
    margin-top: 20px;
}

@media (max-width: 768px) {
    .table th, .table td {
        font-size: 12px;
        padding: 8px;
    }

    .btn {
        font-size: 12px;
        padding: 8px 12px;
    }

    .card {
        padding: 15px;
    }

    h2 {
        font-size: 22px;
    }
}