body {
    font-family: Arial, sans-serif;
    background-color: black;
    color: white;
    text-align: center;
}

header {
    background: url('header-background.jpg') no-repeat center;
    background-size: cover;
    padding: 50px;
    color: white;
}

header h1 {
    font-size: 3em;
}

header a {
    display: inline-block;
    margin-top: 10px;
    color: white;
    text-decoration: none;
    font-size: 1.2em;
}

section#color-change-section {
    margin-top: 40px;
}

button {
    margin: 10px;
    padding: 10px 20px;
    font-size: 16px;
    border: none;
    cursor: pointer;
    color: white;
    background-color: gray;
    border-radius: 5px;
}

button:hover {
    background-color: darkgray;
}

#text {
    font-size: 2em;
    margin-top: 20px;
}