* {
    box-sizing: border-box;
}

html {
    color: #333;
    font-family: 'OCR-A', Monospace;
    font-size: 80%;
}

body {
    box-sizing: content-box;
    max-inline-size: 80em;
    margin-block: 0.5em 0;
    margin-inline: auto;
    padding-inline: 1em;
}

a {
    color: #666;
}

a:hover {
    color: #000;
}

h1 {
    color: #000;
    font-weight: normal;
    text-transform: uppercase;
    font-size: 120%;
    line-height: 1;
}

footer {
    font-size: 80%;
    text-align: center;
    padding: 0.5em;
    color: #666;
}

dialog {
    border: 1px solid;
    box-shadow: 0 0 0.5em #0004;
}

.top {
    margin-block-end: 1.5em;
}

#canvas {
    border: 1px solid #e6e6e6;
    inline-size: 100%;
}

#grid {
    display: block;
    position: relative;
}

#grid img {
    inline-size: 100%;
    block-size: auto;
    vertical-align: bottom;
}

.grid__focus,
.grid__hover {
    width: 0.8%;
    height: 1.25%;
    position: absolute;
}

.grid__focus {
    background-color: red;
    box-shadow: 0 0 1em red;
}

.grid__hover {
    border: 1px solid black;
}

#more {
    max-inline-size: 40em;
}

#more p {
    margin-block: 3em;
}

#more ul {
    text-align: center;
    padding: 0;
    margin: 0;
}

#more li {
    display: block;
    margin-block: 1.5em;
}

@media (min-width: 600px) {
    .top {
        display: grid;
        grid-template-columns: 20% auto 20%;
        grid-gap: 0.5em;
    }
    header {
        grid-column: 1;
    }
    #canvas {
        grid-column: 2;
    }
}