body {
    font-family: Arial, sans-serif;
    margin: 0;
    padding: 0;
    background-color: #f4f4f9;
}

header {
    background-color: #2c3e50;
    color: white;
    padding: 12px 0;
}

.menu ul {
    list-style: none;
    margin: 0;
    padding: 0;
    display: flex;
    justify-content: center;
}

.menu ul li {
    margin: 0 15px;
}

.menu ul li a {
    color: white;
    text-decoration: none;
    font-weight: bold;
}

.menu ul li a:hover {
    text-decoration: underline;
}

.container {
    max-width: 900px;
    margin: 20px auto;
    background: white;
    padding: 20px;
    border-radius: 8px;
    box-shadow: 0px 4px 6px rgba(0, 0, 0, 0.1);
}

h1 {
    text-align: center;
    margin-bottom: 20px;
}

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

.form-group label {
    display: block;
    font-weight: bold;
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 10px;
    margin-top: 5px;
    border: 1px solid #ccc;
    border-radius: 4px;
}

.btn {
    display: inline-block;
    padding: 10px 15px;
    background-color: #27ae60;
    color: white;
    text-decoration: none;
    border: none;
    border-radius: 4px;
    font-weight: bold;
    cursor: pointer;
}

.btn:hover {
    background-color: #2ecc71;
}

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

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

table th {
    background-color: #f4f4f9;
    font-weight: bold;
}

table tbody tr:nth-child(even) {
    background-color: #f9f9f9;
}