body {
    font-family: Arial;
    margin: 0;
    background: #f5f5f5;
}

nav {
    background: #333;
    padding: 10px;
}

nav a {
    color: white;
    margin-right: 15px;
    text-decoration: none;
}

.container {
    padding: 20px;
}

table {
    width: 100%;
    background: white;
    border-collapse: collapse;
}

td, th {
    padding: 10px;
    border: 1px solid #ddd;
}

button {
    padding: 15px;
    font-size: 18px;
    width: 100%;
}