body {
    font-family: Arial, sans-serif;
    margin: 0;
    padding: 0;
    background-color: #f4f4f4;
    color: #333;
}

.container {
    width: 90%;
    max-width: 1200px;
    margin: 20px auto;
    background-color: #fff;
    padding: 20px;
    box-shadow: 0 0 10px rgba(0, 0, 0, 0.1);
    border-radius: 8px;
}

header {
    background-color: #333;
    color: #fff;
    padding: 10px 20px;
    border-radius: 8px 8px 0 0;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

header h1 {
    margin: 0;
    font-size: 24px;
}

nav ul {
    list-style: none;
    padding: 0;
    margin: 0;
}

nav ul li {
    display: inline;
    margin-left: 20px;
}

nav ul li a {
    color: #fff;
    text-decoration: none;
    font-weight: bold;
}

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

main {
    padding: 20px 0;
}

footer {
    text-align: center;
    padding: 10px;
    margin-top: 20px;
    background-color: #eee;
    border-radius: 0 0 8px 8px;
    color: #555;
}

h2 {
    color: #333;
    border-bottom: 2px solid #eee;
    padding-bottom: 10px;
    margin-bottom: 20px;
}

.message.success {
    background-color: #d4edda;
    color: #155724;
    padding: 10px;
    border: 1px solid #c3e6cb;
    border-radius: 5px;
    margin-bottom: 15px;
}

.message.error {
    background-color: #f8d7da;
    color: #721c24;
    padding: 10px;
    border: 1px solid #f5c6cb;
    border-radius: 5px;
    margin-bottom: 15px;
}

form {
    background-color: #f9f9f9;
    padding: 20px;
    border-radius: 5px;
    margin-bottom: 20px;
    border: 1px solid #ddd;
}

form label {
    display: block;
    margin-bottom: 8px;
    font-weight: bold;
}

form input[type="text"],
form input[type="password"],
form input[type="number"],
form textarea,
form select {
    width: calc(100% - 22px);
    padding: 10px;
    margin-bottom: 15px;
    border: 1px solid #ccc;
    border-radius: 4px;
    font-size: 16px;
}

form input[type="submit"],
.button {
    background-color: #007bff;
    color: white;
    padding: 10px 20px;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    font-size: 16px;
    text-decoration: none;
    display: inline-block;
    margin-right: 10px;
}

form input[type="submit"]:hover,
.button:hover {
    background-color: #0056b3;
}

.button.delete {
    background-color: #dc3545;
}

.button.delete:hover {
    background-color: #bd2130;
}

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

table th, table td {
    border: 1px solid #ddd;
    padding: 8px;
    text-align: left;
}

table th {
    background-color: #f2f2f2;
    font-weight: bold;
}

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

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

.actions a {
    margin-right: 5px;
    text-decoration: none;
}