body {
    font-family: 'Arial', sans-serif;
    margin: 0;
    padding: 0;
    line-height: 1.6;
    background: #fff;
    color: #000;
}

header {
    background: #fff;
    color: #000;
    padding: 20px;
    text-align: center;
    border-bottom: 1px solid #ddd;
}

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

nav ul li {
    display: inline;
    margin-right: 15px;
}

main {
    padding: 20px;
    text-align: center;
}

section {
    margin-bottom: 40px;
}

table {
    margin: 0 auto;
    border-collapse: collapse;
    width: 90%;
    max-width: 600px;
}

th, td {
    padding: 10px;
    border: 1px solid #ccc;
    text-align: left;
}

.button {
    display: inline-block;
    padding: 10px 20px;
    border: 2px solid black;
    color: black;
    text-decoration: none;
    border-radius: 5px;
    margin-top: 10px;
}