:root {
    --ink: #17142b;
    --paper: #fffaf0;
    --teal: #00a5a8;
    --magenta: #ff3d8b;
    --yellow: #ffd23f;
    --purple: #6c4ee0;
    --orange: #ff7a2f;
    --lcd: #b9c48d;
    --lcd-ink: #2f3a1c;
    --printout: #eef7ea;
    --rule: 3px solid var(--ink);
    --shadow: 6px 6px 0 var(--ink);
    --heading: "Futura", "Avenir Next", "Century Gothic", "Trebuchet MS", sans-serif;
    --body: "Iowan Old Style", "Palatino Linotype", Palatino, "Book Antiqua", Georgia, serif;
    --mono: "Courier New", Courier, ui-monospace, Menlo, monospace;
    --squiggle: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='40' height='12' viewBox='0 0 40 12'%3E%3Cpath d='M0 6 Q5 0 10 6 T20 6 T30 6 T40 6' fill='none' stroke='%23ff3d8b' stroke-width='3'/%3E%3C/svg%3E");
    --confetti: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='220' height='220' viewBox='0 0 220 220'%3E%3Cpath d='M20 30 l14 -14 M60 170 l18 8' stroke='%2317142b' stroke-width='4' stroke-linecap='round'/%3E%3Cpath d='M150 40 Q158 30 166 40 T182 40 T198 40' fill='none' stroke='%2300a5a8' stroke-width='4'/%3E%3Cpath d='M30 110 Q38 100 46 110 T62 110' fill='none' stroke='%236c4ee0' stroke-width='4'/%3E%3Ccircle cx='120' cy='120' r='7' fill='%23ffd23f' stroke='%2317142b' stroke-width='3'/%3E%3Ccircle cx='190' cy='160' r='4' fill='%2317142b'/%3E%3Cpath d='M100 190 l12 -20 l12 20 z' fill='%23ff3d8b'/%3E%3Cpath d='M170 95 l10 0 l0 10 l-10 0 z' fill='none' stroke='%23ff7a2f' stroke-width='3' transform='rotate(20 175 100)'/%3E%3Ccircle cx='80' cy='60' r='3' fill='%23ff3d8b'/%3E%3C/svg%3E");
}

* {
    box-sizing: border-box;
}

html {
    background: #f4ecdc var(--confetti);
    color: var(--ink);
}

body {
    margin: 0 auto;
    max-width: 62rem;
    padding: 1.5rem 1rem 3rem;
    font: 1.06rem/1.6 var(--body);
}

a {
    color: var(--purple);
    text-decoration-thickness: 2px;
    text-underline-offset: 2px;

    &:hover {
        background: var(--yellow);
        color: var(--ink);
    }
}

h1, h2, h3, h4 {
    font-family: var(--heading);
    line-height: 1.15;
}

body > header {
    position: relative;
    margin-bottom: 2rem;
    padding: 1.25rem 1.5rem 1.5rem;
    border: var(--rule);
    box-shadow: var(--shadow);
    background:
        radial-gradient(circle at 92% 30%, var(--yellow) 0 2.2rem, transparent 2.3rem),
        linear-gradient(135deg, transparent 0 78%, var(--magenta) 78% 84%, transparent 84%),
        repeating-linear-gradient(45deg, transparent 0 10px, rgb(23 20 43 / 0.06) 10px 12px),
        var(--teal);
    color: var(--paper);

    & > p:first-child {
        margin: 0;
        font: 700 0.8rem/1 var(--heading);
        letter-spacing: 0.25em;
        text-transform: uppercase;
    }

    & h1 {
        margin: 0.4rem 0 1rem;
        font-size: clamp(1.8rem, 5vw, 3rem);
        text-shadow: 3px 3px 0 var(--ink);

        & small {
            display: block;
            width: fit-content;
            margin-bottom: 0.5rem;
            padding: 0.15rem 0.6rem;
            background: var(--ink);
            color: var(--yellow);
            font-size: 0.9rem;
            letter-spacing: 0.1em;
            text-shadow: none;
            text-transform: uppercase;
            transform: rotate(-2deg);
        }
    }
}

nav ol {
    display: flex;
    flex-wrap: wrap;
    gap: 0.4rem;
    margin: 0;
    padding: 0;
    list-style: none;

    & a {
        display: block;
        padding: 0.2rem 0.6rem;
        border: 2px solid var(--ink);
        background: var(--paper);
        color: var(--ink);
        font: 700 0.8rem/1.4 var(--heading);
        text-decoration: none;

        &:hover {
            background: var(--yellow);
        }

        &[aria-current] {
            background: var(--magenta);
            color: var(--paper);
        }
    }
}

main {
    min-width: 0;
    overflow-wrap: break-word;
    padding: 1rem clamp(1rem, 4vw, 3rem) 2rem;
    border: var(--rule);
    box-shadow: var(--shadow);
    background: var(--paper);
}

main > section,
article > section {
    margin-top: 2.5rem;
}

h2 {
    width: fit-content;
    margin: 2.5rem 0 1rem;
    padding: 0.25rem 0.75rem 0.4rem;
    background: var(--ink);
    box-shadow: 5px 5px 0 var(--magenta);
    color: var(--paper);
    font-size: 1.6rem;
    transform: rotate(-1deg);

    & + p::first-letter {
        float: left;
        margin: 0.05em 0.1em 0 0;
        color: var(--teal);
        font: 700 3.1em/0.8 var(--heading);
    }
}

section:nth-of-type(3n + 2) > h2 {
    box-shadow: 5px 5px 0 var(--teal);
}

section:nth-of-type(3n) > h2 {
    box-shadow: 5px 5px 0 var(--yellow);
}

h3 {
    margin: 2rem 0 0.5rem;
    padding-bottom: 0.4rem;
    background: var(--squiggle) left bottom / 40px 8px repeat-x;
    font-size: 1.2rem;

    &::before {
        content: "";
        display: inline-block;
        width: 0.7em;
        height: 0.7em;
        margin-right: 0.45em;
        border: 2px solid var(--ink);
        border-radius: 50%;
        background: var(--yellow);
    }
}

h4 {
    margin: 1.5rem 0 0.25rem;
    font-size: 1rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

code, kbd, pre {
    font-family: var(--mono);
}

:not(pre) > code {
    padding: 0 0.2em;
    background: rgb(255 210 63 / 0.45);
    font-size: 0.92em;
    overflow-wrap: anywhere;
}

kbd {
    padding: 0 0.35em;
    border: 2px solid var(--ink);
    border-bottom-width: 4px;
    border-radius: 4px;
    background: var(--paper);
    font-size: 0.85em;
    white-space: nowrap;
}

pre {
    position: relative;
    margin: 1.25rem 0;
    padding: 0;
    overflow-x: auto;
    border: 0 solid transparent;
    border-inline-width: 2.2rem;
    outline: 2px solid var(--ink);
    box-shadow: 6px 6px 0 -2px var(--purple);
    background:
        radial-gradient(circle, #f4ecdc 0 0.32rem, var(--ink) 0.36rem 0.42rem, transparent 0.46rem) left 0.45rem top 0.3rem / 1.1rem 1.5rem repeat-y border-box,
        radial-gradient(circle, #f4ecdc 0 0.32rem, var(--ink) 0.36rem 0.42rem, transparent 0.46rem) right 0.45rem top 0.3rem / 1.1rem 1.5rem repeat-y border-box,
        repeating-linear-gradient(var(--printout) 0 3em, #fff 3em 6em) 0 0.75em border-box;
    font-size: 0.86rem;
    line-height: 1.5;

    & code {
        display: block;
        width: fit-content;
        min-width: 100%;
        padding: 0.75em 0;
    }

    & .keyword,
    & .preprocessor {
        color: #5b21b6;
        font-weight: 700;
    }

    & .type {
        color: #00686b;
        font-weight: 700;
    }

    & .constant {
        color: #a3004a;
    }

    & .function {
        color: #1e3a8a;
    }

    & .string {
        color: #8a3b00;
    }

    & .number {
        color: #b4001e;
    }

    & .comment {
        color: #5f6368;
        font-style: italic;
    }

    &[data-file]::before {
        content: attr(data-file);
        position: sticky;
        left: 0;
        display: block;
        width: fit-content;
        margin: 0;
        padding: 0.1rem 0.6rem;
        background: var(--ink);
        color: var(--yellow);
        font: 700 0.75rem/1.5 var(--heading);
        letter-spacing: 0.05em;
    }
}

aside {
    position: relative;
    margin: 1.75rem 0;
    padding: 1.4rem 1.25rem 0.75rem;
    border: 2px solid var(--ink);
    box-shadow: 4px 4px 0 var(--ink);
    background: #fff3c4;

    & > strong:first-child {
        position: absolute;
        top: -0.85rem;
        left: 0.9rem;
        padding: 0.1rem 0.6rem;
        background: var(--magenta);
        color: var(--paper);
        font: 700 0.8rem/1.4 var(--heading);
        letter-spacing: 0.1em;
        text-transform: uppercase;
        transform: rotate(-3deg);
    }

    & > p:first-of-type {
        margin-top: 0;
    }

    &:nth-of-type(even) {
        background: #dcf5f3;

        & > strong:first-child {
            background: var(--purple);
        }
    }
}

figure {
    margin: 2rem 0;

    & img {
        display: block;
        max-width: 100%;
        height: auto;
        border: 2px solid var(--ink);
        box-shadow: 4px 4px 0 var(--ink);
        image-rendering: auto;
    }

    & > figcaption {
        margin-top: 0.75rem;
        font-style: italic;
    }

    &:has(> figure) {
        display: grid;
        grid-template-columns: repeat(auto-fit, minmax(min(100%, 22rem), 1fr));
        gap: 1.5rem;
        padding: 1.25rem;
        border: 2px dashed var(--ink);
        background: rgb(255 61 139 / 0.06);

        & > figcaption {
            grid-column: 1 / -1;
            margin: 0;
        }
    }

    & figure {
        min-width: 0;
        margin: 0;

        &:nth-of-type(odd) {
            transform: rotate(-0.6deg);
        }

        &:nth-of-type(even) {
            transform: rotate(0.6deg);
        }

        & figcaption {
            width: fit-content;
            margin: -0.75rem 0 0 1rem;
            padding: 0.1rem 0.5rem;
            position: relative;
            background: var(--yellow);
            border: 2px solid var(--ink);
            font: 700 0.8rem/1.4 var(--heading);
            font-style: normal;
        }
    }
}

table {
    width: 100%;
    margin: 1.25rem 0;
    border-collapse: collapse;
    border: var(--rule);
    background: #fff;
    font-size: 0.92rem;

    & caption {
        padding: 0.4rem;
        caption-side: bottom;
        font-style: italic;
        text-align: left;
    }

    & th, & td {
        padding: 0.35rem 0.6rem;
        border: 1px solid var(--ink);
        text-align: left;
        vertical-align: top;
    }

    & thead th {
        background: var(--teal);
        color: var(--paper);
        font-family: var(--heading);
    }

    & tbody tr:nth-child(even) {
        background: #f6f0ff;
    }

    & tbody th {
        font-weight: normal;
    }

    & tbody th[scope="rowgroup"] {
        background: var(--yellow);
        font: 700 0.9rem/1.4 var(--heading);
    }

    & td:is(:empty) {
        background: repeating-linear-gradient(45deg, transparent 0 4px, rgb(23 20 43 / 0.12) 4px 6px);
    }
}

figure:has(> table) {
    overflow-x: auto;

    & table {
        margin: 0;
    }
}

dl {
    display: grid;
    grid-template-columns: minmax(8rem, max-content) 1fr;
    gap: 0.4rem 1.25rem;

    & dt {
        font-weight: 700;
    }

    & dd {
        margin: 0;
    }
}

@media (max-width: 40rem) {
    dl {
        grid-template-columns: 1fr;

        & dd {
            margin: 0 0 0.6rem 1rem;
        }
    }
}

hr {
    height: 14px;
    margin: 2.5rem 0;
    border: 0;
    background: var(--squiggle) center / 40px 12px repeat-x;
}

blockquote {
    margin: 1.5rem 0;
    padding: 0.5rem 1.25rem;
    border-left: 8px solid var(--orange);
    background: #fff;
    font-style: italic;
}

body > footer {
    margin-top: 1.5rem;

    & ul {
        display: flex;
        justify-content: space-between;
        gap: 1rem;
        margin: 0;
        padding: 0;
        list-style: none;
    }

    & a {
        display: block;
        padding: 0.5rem 1rem;
        border: var(--rule);
        box-shadow: 4px 4px 0 var(--ink);
        background: var(--yellow);
        color: var(--ink);
        font: 700 0.95rem/1.3 var(--heading);
        text-decoration: none;

        &:hover {
            background: var(--magenta);
            color: var(--paper);
        }
    }

    & li:last-child {
        margin-left: auto;
        text-align: right;
    }

    & p {
        margin-top: 2rem;
        font-size: 0.8rem;
        text-align: center;
    }
}

article > header {
    position: relative;
    display: grid;
    grid-template-columns: minmax(0, 1.2fr) minmax(0, 1fr);
    align-items: center;
    gap: 2rem;
    margin: -1rem calc(-1 * clamp(1rem, 4vw, 3rem)) 0;
    padding: 2.5rem clamp(1rem, 4vw, 3rem);
    overflow: hidden;
    border-bottom: var(--rule);
    background:
        radial-gradient(circle at 0 100%, var(--yellow) 0 3rem, transparent 3.1rem),
        conic-gradient(from 45deg at 100% 0, var(--magenta) 0 25%, transparent 25%) top right / 9rem 9rem no-repeat,
        repeating-linear-gradient(-45deg, transparent 0 14px, rgb(0 165 168 / 0.18) 14px 18px),
        var(--paper);

    & > p:first-child {
        grid-column: 1 / -1;
        margin: 0;
        font: 700 0.85rem/1 var(--heading);
        letter-spacing: 0.3em;
        text-transform: uppercase;
    }

    & h1 {
        margin: 0;
        font-size: clamp(2.2rem, 6vw, 4rem);
        line-height: 0.95;
        text-transform: uppercase;
        text-shadow: 4px 4px 0 var(--teal), 8px 8px 0 var(--magenta);

        & small {
            display: block;
            margin-top: 1rem;
            color: var(--purple);
            font-size: 0.35em;
            letter-spacing: 0.08em;
            text-shadow: none;
        }
    }

    & svg {
        width: 100%;
        height: auto;
        filter: drop-shadow(6px 6px 0 var(--ink));
    }

    & mark {
        position: absolute;
        right: 1.5rem;
        bottom: 1.25rem;
        display: grid;
        place-items: center;
        width: 10.5rem;
        aspect-ratio: 1;
        padding: 2.4rem;
        background: var(--yellow);
        clip-path: polygon(50% 0, 61% 18%, 82% 10%, 80% 32%, 100% 40%, 85% 56%, 96% 76%, 74% 78%, 68% 100%, 50% 86%, 32% 100%, 26% 78%, 4% 76%, 15% 56%, 0 40%, 20% 32%, 18% 10%, 39% 18%);
        color: var(--ink);
        font: 700 0.72rem/1.15 var(--heading);
        text-align: center;
        text-transform: uppercase;
        transform: rotate(12deg);
    }

    & > p:last-of-type:not(:first-child) {
        grid-column: 1 / -1;
        margin: 0;
        max-width: 34rem;
        font-size: 1.15rem;
    }
}

@media (max-width: 44rem) {
    article > header {
        grid-template-columns: 1fr;

        & mark {
            position: static;
            justify-self: end;
            width: 9rem;
            margin-top: -1rem;
            padding: 2.2rem;
            font-size: 0.62rem;
        }
    }
}

ol:has(> li > a > strong) {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(min(100%, 17rem), 1fr));
    gap: 1rem;
    margin: 1.5rem 0;
    padding: 0;
    counter-reset: chapter;
    list-style: none;

    & li {
        counter-increment: chapter;
    }

    & a {
        position: relative;
        display: block;
        height: 100%;
        padding: 1rem 1rem 1rem 4.2rem;
        border: 2px solid var(--ink);
        box-shadow: 4px 4px 0 var(--ink);
        background: #fff;
        color: var(--ink);
        text-decoration: none;

        &::before {
            content: counter(chapter);
            position: absolute;
            top: 0.9rem;
            left: 0.8rem;
            display: grid;
            place-items: center;
            width: 2.6rem;
            height: 2.6rem;
            border: 2px solid var(--ink);
            border-radius: 50%;
            background: var(--teal);
            color: var(--paper);
            font: 700 1.3rem/1 var(--heading);
        }

        &:hover {
            background: var(--yellow);
            transform: translate(-2px, -2px);
            box-shadow: 6px 6px 0 var(--ink);
        }

        & strong {
            display: block;
            font: 700 1.05rem/1.25 var(--heading);
        }

        & span {
            display: block;
            margin-top: 0.3rem;
            font-size: 0.9rem;
        }
    }

    & li:nth-child(3n + 2) a::before {
        background: var(--magenta);
    }

    & li:nth-child(3n) a::before {
        background: var(--purple);
    }
}