body {
    font-family: Arial, sans-serif;
    margin: 0;
    padding: 0;
    background-color: #fafafa;
    color: #333;
}
header {
    background-color: #20232a;
    color: #61dafb;
    padding: 20px;
    text-align: center;
}
header h1 {
    margin: 0;
    font-size: 2rem;
}
header nav ul {
    list-style: none;
    padding: 0;
    margin: 10px 0;
    display: flex;
    justify-content: center;
    gap: 15px;
}
header nav a {
    color: #61dafb;
    text-decoration: none;
    font-weight: bold;
}
header nav a:hover {
    text-decoration: underline;
}
main {
    max-width: 800px;
    margin: auto;
    padding: 20px;
    background-color: #fff;
    box-shadow: 0 0 10px rgba(0,0,0,0.1);
}
h1, h2, h3 {
    color: #20232a;
}
table {
    width: 100%;
    border-collapse: collapse;
    margin-top: 20px;
}
table, th, td {
    border: 1px solid #ccc;
}
th, td {
    padding: 10px;
    text-align: left;
}
footer {
    text-align: center;
    padding: 20px;
    background-color: #20232a;
    color: #61dafb;
    margin-top: 20px;
}
a {
    color: #007acc;
}