body {
    font-family: Arial, sans-serif;
    margin: 0;
    padding: 0;
}

header {
    background-color: #4CAF50;
    color: white;
    padding: 1rem;
    text-align: center;
}

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

nav ul li {
    display: inline;
    margin: 0 15px;
}

nav a {
    color: white;
    text-decoration: none;
}

main {
    padding: 1rem;
}

section {
    margin-bottom: 2rem;
}

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

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

th, td {
    padding: 0.8rem;
    text-align: left;
}

th {
    background-color: #f2f2f2;
}

footer {
    text-align: center;
    padding: 1rem;
    background-color: #f1f1f1;
    position: relative;
    bottom: 0;
    width: 100%;
}