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

header {
    background-color: #003366;
    color: white;
    padding: 10px 0;
    text-align: center;
}

nav {
    background-color: #004080;
    overflow: hidden;
}

nav a {
    float: left;
    display: block;
    color: white;
    text-align: center;
    padding: 14px 20px;
    text-decoration: none;
}

nav a:hover {
    background-color: #ddd;
    color: black;
}

.container {
    padding: 20px;
}

h1 {
    color: #004080;
}

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

table, th, td {
    border: 1px solid #ddd;
}

th, td {
    padding: 12px;
    text-align: left;
}

th {
    background-color: #004080;
    color: white;
}

.btn {
    background-color: #004080;
    color: white;
    border: none;
    padding: 10px 15px;
    text-align: center;
    text-decoration: none;
    display: inline-block;
    margin: 4px 2px;
    cursor: pointer;
    border-radius: 4px;
}

.btn-delete {
    background-color: #d9534f;
}

.btn-edit {
    background-color: #5bc0de;
}

form {
    background: white;
    padding: 20px;
    border-radius: 8px;
    box-shadow: 0 0 10px rgba(0, 0, 0, 0.1);
    max-width: 500px;
    margin: auto;
}

label {
    display: block;
    margin: 10px 0 5px;
}

input, select {
    width: 100%;
    padding: 10px;
    margin-bottom: 10px;
    border: 1px solid #ddd;
    border-radius: 4px;
}