:root {
    --color-primary: #ffdb3a;
}


html {
    font-size: 62.5%;
    background-color: var(--color-primary);
    color: #fff;
}

body {
    font-family: -apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,"Helvetica Neue",Oxygen-Sans,Ubuntu,Cantarell,sans-serif;
    font-size: 1.5rem;
    line-height: 1.4;
    font-weight: 300;
    text-align: center;

    padding: 15px;
    min-height: 100vh;
    
    display: flex;
    flex-direction: column;
}

header {
    padding: 20px;
}

h1 {
    font-size: 2rem;
    font-weight: 600;
}


iframe {
    width: 100%;
    flex: 1;
}

@media (min-width: 500px) {
    body {
        padding: 20px;
    }
}