body {
    font-family: Arial, sans-serif;
    margin: 0;
    padding: 0;
    background: #fefefe;
    color: #333;
}
header {
    background: #101e2b;
    color: white;
    padding: 1em;
    text-align: center;
}
.logo {
    max-width: 80px;
    display: block;
    margin: 0 auto;
}
nav a {
    color: #fff;
    margin: 0 10px;
    text-decoration: none;
}
.hero {
    padding: 2em;
    text-align: center;
}
.btn {
    display: inline-block;
    margin-top: 1em;
    padding: 0.7em 1.5em;
    background: #0055aa;
    color: white;
    border-radius: 5px;
    text-decoration: none;
}
footer {
    background: #f1f1f1;
    color: #555;
    text-align: center;
    padding: 1em;
    font-size: 0.9em;
    position: fixed;
    width: 100%;
    bottom: 0;
}