/* The documentation surface.
   Obsidian and bronze, the same identity as the landing and Studio — but a reading
   surface rather than a product one, so the palette is flatter and nothing animates. */

@import url("./fonts.css");

:root {
    --ground: #0b0a09;
    --raised: #121110;
    --well: #171614;
    --line: rgba(240, 232, 218, 0.11);
    --line-strong: rgba(240, 232, 218, 0.2);
    --text: #ece6dc; /* body */
    --text-2: #b3aa9c; /* secondary */
    --text-3: #857c6e; /* labels; the floor for text */
    --bronze: #c98a4b;
    --bronze-soft: #e0a86b;
    --measure: 74ch;
    --side: 268px;
}

* {
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    margin: 0;
    background: var(--ground);
    color: var(--text);
    font-family: var(--sans);
    font-size: 15.5px;
    line-height: 1.72;
    -webkit-font-smoothing: antialiased;
}

/* Korean breaks between words rather than mid-word — the single most visible
   difference between typeset Korean and Korean that merely wraps. */
html[lang="ko"] body,
[lang="ko"] {
    word-break: keep-all;
}

.skip {
    position: absolute;
    left: -9999px;
}

.skip:focus {
    left: 12px;
    top: 12px;
    z-index: 10;
    padding: 8px 14px;
    border-radius: 6px;
    background: var(--bronze);
    color: #14110d;
}

/* ── chrome ─────────────────────────────────────────────────────────────── */

.top {
    position: sticky;
    top: 0;
    z-index: 5;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 20px;
    height: 58px;
    padding: 0 22px;
    border-bottom: 1px solid var(--line);
    background: rgba(11, 10, 9, 0.86);
    backdrop-filter: blur(14px);
}

.brand {
    display: inline-flex;
    align-items: center;
    gap: 9px;
    color: var(--text);
    text-decoration: none;
    font-weight: 600;
    letter-spacing: 0.01em;
}

.brand img {
    display: block;
}

.brand em {
    color: var(--text-3);
    font-family: var(--mono);
    font-size: 11px;
    font-style: normal;
    letter-spacing: 0.14em;
    text-transform: uppercase;
}

.top-links {
    display: flex;
    gap: 18px;
    font-size: 13px;
}

.top-links a {
    color: var(--text-2);
    text-decoration: none;
}

.top-links a:hover {
    color: var(--text);
}

.frame {
    display: grid;
    grid-template-columns: var(--side) minmax(0, 1fr);
    gap: 0;
    max-width: 1240px;
    margin: 0 auto;
}

/* ── sidebar ────────────────────────────────────────────────────────────── */

.side {
    position: sticky;
    top: 58px;
    align-self: start;
    max-height: calc(100vh - 58px);
    overflow-y: auto;
    padding: 26px 20px 60px;
    border-right: 1px solid var(--line);
    font-size: 13.5px;
}

.side h2 {
    margin: 26px 0 8px;
    color: var(--text-3);
    font-family: var(--mono);
    font-size: 10px;
    font-weight: 500;
    letter-spacing: 0.13em;
    text-transform: uppercase;
}

.side ul {
    margin: 0;
    padding: 0;
    list-style: none;
}

.side li {
    margin: 1px 0;
}

.side a {
    display: block;
    padding: 5px 10px;
    border-radius: 6px;
    color: var(--text-2);
    text-decoration: none;
}

.side a:hover {
    background: rgba(240, 232, 218, 0.05);
    color: var(--text);
}

.side a[aria-current="page"] {
    background: rgba(201, 138, 75, 0.13);
    color: var(--bronze-soft);
    /* Colour alone would not survive a monochrome display or a colour-blind reader; the
       rule carries the same signal geometrically. */
    box-shadow: inset 2px 0 0 var(--bronze);
}

/* ── document ───────────────────────────────────────────────────────────── */

.doc {
    min-width: 0;
    max-width: var(--measure);
    padding: 40px 34px 100px;
}

.doc h1,
.doc h2,
.doc h3,
.doc h4 {
    line-height: 1.32;
    scroll-margin-top: 76px;
}

.doc h1 {
    margin: 0 0 24px;
    font-size: 30px;
    letter-spacing: -0.015em;
}

.doc h2 {
    margin: 46px 0 14px;
    padding-top: 22px;
    border-top: 1px solid var(--line);
    font-size: 21px;
    letter-spacing: -0.01em;
}

.doc h3 {
    margin: 32px 0 10px;
    font-size: 16.5px;
}

.doc h4 {
    margin: 24px 0 8px;
    color: var(--text-2);
    font-size: 14.5px;
}

.doc .anchor {
    color: inherit;
    text-decoration: none;
}

.doc .anchor:hover {
    color: var(--bronze-soft);
}

.doc p,
.doc li {
    color: var(--text);
}

.doc a {
    color: var(--bronze-soft);
    text-decoration: underline;
    text-decoration-color: rgba(224, 168, 107, 0.35);
    text-underline-offset: 3px;
}

.doc a:hover {
    text-decoration-color: var(--bronze-soft);
}

.doc strong {
    color: #fff;
    font-weight: 650;
}

.doc blockquote {
    margin: 20px 0;
    padding: 2px 0 2px 18px;
    border-left: 2px solid var(--bronze);
    color: var(--text-2);
}

.doc hr {
    height: 1px;
    margin: 40px 0;
    border: 0;
    background: var(--line);
}

/* ── code ───────────────────────────────────────────────────────────────── */

.doc code {
    padding: 1.5px 5px;
    border-radius: 4px;
    background: var(--well);
    color: var(--bronze-soft);
    font-family: var(--mono);
    font-size: 0.875em;
}

.doc pre {
    overflow-x: auto;
    margin: 20px 0;
    padding: 15px 17px;
    border: 1px solid var(--line);
    border-radius: 9px;
    background: var(--well);
    line-height: 1.6;
}

.doc pre code {
    padding: 0;
    background: none;
    color: var(--text);
    font-size: 13px;
}

/* ── tables ─────────────────────────────────────────────────────────────── */

/* The evidence tables are the widest thing in this book and several exceed the measure.
   The wrapper scrolls rather than the page: a document whose body scrolls sideways is
   unreadable on a phone, and these tables are exactly what a phone reader came for. */
.doc table {
    display: block;
    overflow-x: auto;
    width: 100%;
    margin: 22px 0;
    border-collapse: collapse;
    font-size: 13.5px;
}

.doc th,
.doc td {
    padding: 9px 13px;
    border: 1px solid var(--line);
    text-align: left;
    vertical-align: top;
}

.doc th {
    background: var(--raised);
    color: var(--text-2);
    font-family: var(--mono);
    font-size: 11px;
    font-weight: 500;
    letter-spacing: 0.07em;
    text-transform: uppercase;
    white-space: nowrap;
}

.doc tbody tr:nth-child(even) td {
    background: rgba(240, 232, 218, 0.022);
}

/* ── diagrams ───────────────────────────────────────────────────────────── */

.doc pre.mermaid {
    padding: 22px;
    border-radius: 9px;
    background: var(--raised);
    text-align: center;
    /* Hidden until drawn: the raw `sequenceDiagram …` source flashing before mermaid
       runs reads as a broken page. `diagrams.js` reveals it. */
    visibility: hidden;
}

.doc pre.mermaid[data-drawn] {
    visibility: visible;
}

.foot {
    max-width: 1240px;
    margin: 0 auto;
    padding: 22px;
    border-top: 1px solid var(--line);
    color: var(--text-3);
    font-family: var(--mono);
    font-size: 11px;
    letter-spacing: 0.05em;
}

.foot p {
    margin: 0;
}

/* ── narrow ─────────────────────────────────────────────────────────────── */

@media (max-width: 900px) {
    .frame {
        grid-template-columns: minmax(0, 1fr);
    }

    .side {
        position: static;
        max-height: none;
        border-right: 0;
        border-bottom: 1px solid var(--line);
        padding-bottom: 22px;
    }

    .doc {
        padding: 28px 20px 80px;
    }

    .top-links a:first-child {
        display: none;
    }
}