body {
    margin: 0;
    font-family: 'Poppins', sans-serif;
    background: linear-gradient(to bottom, #111, #333);
    color: #eee;
}
header {
    background: #000;
    color: gold;
    padding: 1em;
    display: flex;
    justify-content: space-between;
    align-items: center;
    position: sticky;
    top: 0;
}
nav a {
    color: gold;
    margin-left: 1em;
    text-decoration: none;
}
.hero {
    padding: 5em 2em;
    text-align: center;
}
.hero .btn {
    background: gold;
    color: #000;
    padding: 1em 2em;
    display: inline-block;
    text-decoration: none;
    margin-top: 1em;
}
footer {
    background: #000;
    color: #aaa;
    padding: 2em;
    text-align: center;
}