body {
    margin: 0;
    font-family: Arial, sans-serif;
    background-color: #001f3f;
    color: #ffffff;
}
header nav {
    background-color: #001533;
    padding: 10px;
    text-align: center;
}
header nav a {
    color: #39c0ed;
    font-weight: bold;
    margin: 0 15px;
    text-decoration: none;
}
header nav a:hover {
    text-decoration: underline;
}
table {
    width: 90%;
    max-width: 800px;
    margin: 20px auto;
    border-collapse: collapse;
}
th, td {
    padding: 8px 12px;
    border-bottom: 1px solid #003051;
}
th {
    background-color: #003051;
}
tr:nth-child(even) {
    background-color: #002a4d;
}
tr:nth-child(odd) {
    background-color: #001f3f;
}
.form-container {
    max-width: 400px;
    margin: 30px auto;
    padding: 20px;
    background-color: #002a4d;
    border-radius: 8px;
}
.form-container label {
    display: block;
    margin-bottom: 6px;
}
.form-container input[type="text"],
.form-container select {
    width: 100%;
    padding: 8px;
    margin-bottom: 12px;
    border: none;
    border-radius: 4px;
}
.form-container input[type="submit"] {
    width: 100%;
    padding: 10px;
    background-color: #39c0ed;
    color: #001f3f;
    border: none;
    border-radius: 4px;
    font-size: 16px;
    cursor: pointer;
}
.form-container input[type="submit"]:hover {
    background-color: #2fa8cc;
}
.response-message {
    text-align: center;
    margin-top: 20px;
}