*,
*::before,
*::after {
    box-sizing: border-box;
}

body {
    font-family: sans-serif;
    margin: 0;
    display: grid;
    justify-content: center;
    grid-template-columns: min(96%, 960px);
    min-height: 100vh;
    background: hsl(200, 25%, 80%);
}

.wrapper {
    display: grid;
    grid-template-rows: auto auto 1fr;
    background: hsl(192, 45%, 98%);
    padding: 0 12px;
}

a {
    color: darkblue;
    transition: .5s;

}

a:hover {
    text-decoration-color: transparent;
}

a:active {
    color: darkred;
    text-decoration-color: currentColor;
}

iframe {
    display: block;
    width: 100%;
    aspect-ratio: 16/9;
    border: 1px solid gray;
}

h1>span,
h2>span,
h3>span {
    display: block;
    font-size: .7em;
    color: gray;
    font-family: monospace;
}

footer {
    display: flex;
    justify-content: flex-end;
    margin: 12px 0;
}

footer a {
    line-height: 2;
    padding: 0 1em;
    margin: 0 0 0 12px;
    border: 1px solid;
    border-radius: 6px;
    text-decoration: none;

}