body {
    margin: 0;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    color: #333;
    background-color: #f8f8f8;
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}
header {
    text-align: center;
    background-color: #fff;
    padding: 10px;
}
header img {
    max-width: 100%;
    height: auto;
}
main {
    flex: 1;
    max-width: 1000px;
    margin: 0 auto;
    padding: 20px;
    text-align: center;
}
h1, h2, h3 {
    margin: 0.5em 0;
}
hr {
    margin: 20px auto;
    border: none;
    height: 1px;
    background-color: #ccc;
    width: 80%;
}
.my-button {
    display: inline-block;
    padding: 10px 20px;
    margin: 10px;
    font-size: 1rem;
    color: #fff;
    background-color: #0077c0;
    border: none;
    border-radius: 5px;
    text-decoration: none;
    transition: background-color 0.3s;
}
.my-button:hover {
    background-color: #005f96;
}
table {
    width: 100%;
    max-width: 800px;
    margin: 20px auto;
    border-collapse: collapse;
    background-color: #fff;
}
th {
    background-color: #0077c0;
    color: #fff;
    padding: 12px;
}
td {
    padding: 10px;
    border: 1px solid #ddd;
}
tr:nth-child(even) {
    background-color: #f2f2f2;
}
footer {
    text-align: center;
    padding: 15px;
    background-color: #fff;
}
footer a {
    margin: 0 10px;
    color: #0077c0;
    font-size: 1.5rem;
    text-decoration: none;
}
footer a:hover {
    color: #005f96;
}
@media (max-width: 600px) {
    .my-button {
        width: 80%;
        font-size: 1rem;
    }
    table, th, td {
        font-size: 0.9rem;
    }
}