* {
    box-sizing: border-box;
}

body {
    font-family: sans-serif;
    font-size: 20px;
    line-height: 1.3em;
}

main {
    display: flex;
    justify-content: center;
    text-align: center;
}

h1 {
    font-size: 2em;
    text-align: center;
    line-height: 1em;
}

h1 a {
    text-decoration: none;
    color: inherit;
}

span {
    color: deepskyblue;
}

button,
select {
    cursor: pointer;
    font-size: 100%;
    margin: 0.25em;
    min-width: 8em;
}

.controls {
    margin: 1em 0;
    display: flex;
    justify-content: center;
    align-items: center;
    flex-wrap: wrap;
}

.code {
    font-family: monospace;
    box-shadow: #767676 0px 20px 30px -10px;
    border-radius: 0.5em;
    padding: 1em 2em;
    min-width: 32em;
    max-width: 100%;
    min-height: 12em;
    text-align: left;
    border: 1px solid #cecece;
    margin: 1em;
    line-height: 1.4em;
}

.code-picture {
    text-align: center;
}

.code-picture img {
    margin: 1em 0;
    border: 1px solid #cecece;
    max-width: 80%;
    padding: 1em;
}