body {
    font-family: sans-serif;
    margin: 0;
    padding: 0;
    background: #f7f7f7;
}
header {
    background: #004d40;
    color: #fff;
    padding: 10px 0;
}
header .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}
header nav a {
    color: #fff;
    text-decoration: none;
    margin-left: 15px;
}
.hero {
    padding: 60px;
    text-align: center;
    background: linear-gradient(to right, #00695c, #80cbc4);
    color: white;
}
footer {
    text-align: center;
    padding: 20px;
    background: #004d40;
    color: white;
}