25/assets/app.css

body {
    background: #e1740d;
    margin: 0;
    font-family:
        system-ui,
        -apple-system,
        BlinkMacSystemFont,
        "Segoe UI",
        Roboto,
        Oxygen,
        Ubuntu,
        Cantarell,
        "Open Sans",
        "Helvetica Neue",
        sans-serif;
}

input,
button {
    font-size: 1.25em;
}

dl {
    display: flex;
    margin: 0;
    justify-content: flex-end;
    align-items: center;
}

dt {
    color: #888;
    padding-right: 0.25em;
    font-size: 0.75em;
    text-transform: uppercase;
}

dd {
    margin-left: 0;
    margin-right: 1em;
}

body > header {
    margin-bottom: 3em;
    background: #f1f1f1;
    display: grid;
    grid-template-rows: 1fr 1fr;
    grid-template-columns: auto 1fr;
    grid-template-areas: "name nav" "name banner";
    border: 3px solid #000;
}

body > header > div {
    grid-area: banner;
    padding: 0.5em;
}

body > header > strong {
    grid-area: name;
    font-size: 2.66em;
    padding: 0.66rem;
    display: flex;
    place-items: center;
    border-right: 3px solid #000;
}

@media (max-width: 700px) {
    body > header {
        grid-template-rows: auto auto;
    }
    body > header > strong {
        writing-mode: vertical-rl;
        text-orientation: mixed;
        padding: 0.33rem 0;
    }

    body > header > nav > ul {
        flex-direction: column;
        width: 100%;
    }
}

body > header > nav {
    grid-area: nav;
    display: flex;
    align-items: center;
    border-bottom: 3px solid #000;

    > ul {
        list-style: none;
        margin: 0;
        padding: 0;
        display: flex;
        gap: 0.1em;
        border-left-width: 0;
    }

    a {
        font-weight: bold;
        text-decoration: none;
        color: #261603;
        line-height: 1;
        padding: 0.5rem;
        display: block;

        &:hover,
        &:focus {
            background-color: #261603;
            color: #ff7c14;
        }

        &.current {
            pointer-events: none;
            background-color: #C0430D;
            color: #fff;
        }
    }
}

h1 {
    font-size: 1.75em;
    letter-spacing: -0.066em;
}

h2 {
    font-size: 1.33em;
}

p,
li {
    line-height: 1.66em;
}

h3,
h4 {
    font-size: 1em;
}

main {
    margin: 2em auto;
    max-width: 40em;
}

.cards {
    display: flex;
    flex-direction: column;
    gap: 4em;
}

.card {
    position: relative;
    background-color: #fff;
    border: 6px solid #261603;
    padding: 3em;
    box-sizing: border-box;

    :first-child {
        margin-top: 0;
    }

    :last-child {
        margin-bottom: 0;
    }

    &.collapsed {
        border-top-left-radius: 0;
        border-top-right-radius: 0;
    }
}

@media (max-width: 400px) {
    .card {
        padding: 0.5em;
    }
}

pre {
    padding: 0.5em;
    background-color: #1e2025;
    color: #96df71;
    position: relative;
    margin: 1em 2em;
    overflow-y: auto;

    button {
        position: absolute;
        top: 2px;
        right: 2px;
    }
}

.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    border: 0;
}

.breadcrumbs {
    > .trail > span::after {
        content: "/";
    }
    color: #bbb;

    a {
        color: #777;
    }
}

.head {
    background: #ff7c14;
    border: 10px solid #c0430d;
    position: relative;
    padding: 0.5em;
    margin: 3em 0 7em;
    font-size: 1.25em;

    padding: 1em 2em;

    :first-child {
        margin-top: 0;
    }

    :last-child {
        margin-bottom: 0;
    }

    &::after {
        display: block;
        width: 10px;
        height: 40px;
        content: "";
        background: #c0430d;
        position: absolute;
        left: 50%;
        transform: translateX(-10px) translateY(100%);
        bottom: -10px;
    }
}

.skiplink {
    position: absolute;
    top: -2em;
    left: 1em;
    background-color: #ff0;
    color: #000;
    text-decoration: none;
    padding: 0.25em;
    transition: top 0.25s ease-out;

    &:focus {
        top: 1em;
    }
}

.anders {
    img {
        position: fixed;
        top: 1em;
        left: 1em;
        aspect-ratio: 1;
        border-radius: 50%;
        width: 175px;

        &:hover {
            animation: 1s ease-out 0s infinite alternate burst;
        }
    }

    img + img {
        top: 12.5em;
        left: 5em;
        width: 125px;
    }

    img + img + img {
        top: 18.5em;
        left: 0.5em;
        width: 90px;
    }
}

body > footer {
    max-width: 30em;
    margin: 7em auto;
    display: flex;
    align-items: center;
    gap: 2em;

    img {
        width: 100px;
        height: 100px;
        aspect-ratio: 1 / 1;
        border: 6px solid #c0430d;
        border-radius: 8px;
    }

    p {
        background: #ff7c14;
        border: 6px solid #c0430d;
        border-radius: 8px;
        padding: 0.5em;
        position: relative;

        &::before {
            content: "";
            display: block;
            background: #c0430d;
            width: 12px;
            height: 6px;
            position: absolute;
            top: 45%;
            left: -16px;
        }
    }
}

@media (max-width: 400px) {
    body > footer {
        gap: 10px;
        margin: 2em 0.5em 0;
        font-size: small;

        img {
            width: 60px;
            height: 60px;
        }
    }
}

.bookmarks {
    display: flex;
    flex-direction: column;
    gap: 4em;
}

.bookmark {
    h3 {
        font-weight: normal;
        font-size: 1.5em;
        line-height: 1.33;
        margin-top: 0;
        margin-bottom: 0.25em;
    }

    footer {
        text-align: right;
        font-size: 1em;
        color: #888;

        a {
            color: #444;
        }
    }
}

.article {
    img {
        max-width: 100%;
        display: block;
    }

    margin: 2.8em 0;
    h3 {
        margin: 0;
        font-size: 1.4em;
        line-height: 1.33;
    }

    ul {
        padding-left: 1em;
        margin: 2em;
    }

    li + li {
        margin-top: 0.5em;
    }

    footer {
        margin-top: 3em;
        font-size: 0.75em;
        font-style: italic;
    }

    h2 {
        margin-top: 3rem;
    }
}

.vert {
    position: absolute;
    left: calc(-6px - 2.1em);
    top: 1em;
    background: #fff;
    padding: 0.25em;
    border: 2px solid #261603;
    border-top: 0;
    margin: 0;
    transform: rotate(90deg);
}

@keyframes burst {
    0% {
        transform: scale(1);
    }
    50% {
        transform: scale(1.2);
    }
    100% {
        transform: scale(0.8);
    }
}