html {
    background-color: black;
    color: white;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    justify-content: center;
    height: 100%;
}

#header-img {
    width: 30vw;
}

button {
    border: none;
    background-color: white;
    padding: 10px;
    font-size: 16px;
}

button:hover {
    background-color: #f0f0f0;
}