body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    background-color: #f4f7f9;
    color: #333;
    line-height: 1.6;
    margin: 0;
    padding: 20px;
}

.container {
    max-width: 1000px;
    margin: 0 auto;
}

header {
    text-align: center;
    margin-bottom: 30px;
    padding: 20px;
    background: #fff;
    border-radius: 8px;
    border: 1px solid #e0e0e0;
}

header h1 {
    margin: 0;
    font-size: 28px;
    color: #0056b3;
}

header p {
    margin: 5px 0 0;
    color: #666;
    font-size: 16px;
}

.card {
    background-color: #ffffff;
    border-radius: 8px;
    border: 1px solid #e0e0e0;
    padding: 25px;
    margin-bottom: 25px;
}

.card h2 {
    margin-top: 0;
    border-bottom: 2px solid #f0f0f0;
    padding-bottom: 10px;
    margin-bottom: 20px;
    font-size: 22px;
    color: #333;
}

.form-group {
    margin-bottom: 15px;
}

.form-group label {
    display: block;
    font-weight: 600;
    margin-bottom: 5px;
}

.form-control {
    width: 100%;
    padding: 10px;
    border: 1px solid #ccc;
    border-radius: 5px;
    font-size: 16px;
}

.btn {
    padding: 10px 20px;
    border: none;
    border-radius: 5px;
    background-color: #0056b3;
    color: white;
    font-size: 16px;
    cursor: pointer;
    transition: background-color 0.3s;
    margin-right: 10px;
}

.btn:hover {
    background-color: #004494;
}

.btn-secondary {
    background-color: #6c757d;
}

.btn-secondary:hover {
    background-color: #5a6268;
}

.btn-danger {
    background-color: #dc3545;
}

.btn-danger:hover {
    background-color: #c82333;
}

table {
    width: 100%;
    border-collapse: collapse;
    margin-top: 20px;
}

th, td {
    padding: 12px;
    text-align: left;
    border-bottom: 1px solid #ddd;
}

th {
    background-color: #f8f9fa;
    font-weight: 600;
}

tbody tr:hover {
    background-color: #f1f1f1;
}

footer {
    text-align: center;
    margin-top: 40px;
    padding-top: 20px;
    border-top: 1px solid #e0e0e0;
    color: #888;
}