/* Plumbing for Lotion — trade documentation, not a product page. Drafting-paper
   ground, condensed sans for headings, mono for anything that behaves like data. */

:root {
    --sheet: #eeece5;
    --grid: #ded9cd;
    --ink: #1f2124;
    --muted: #6a6d72;
    --rule: #b9b4a6;
    --mark: #c2410c;
    --panel: #f6f4ef;
}

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

body {
    margin: 0;
    padding: 0 1.5rem 5rem;
    background-color: var(--sheet);
    background-image:
        linear-gradient(to right, var(--grid) 1px, transparent 1px),
        linear-gradient(to bottom, var(--grid) 1px, transparent 1px);
    background-size: 2rem 2rem;
    color: var(--ink);
    font-family: ui-sans-serif, "Helvetica Neue", Arial, sans-serif;
    font-size: 16.5px;
    line-height: 1.55;
}

main,
.masthead,
.colophon {
    max-width: 50rem;
    margin: 0 auto;
}

h1,
h2,
.wordmark span,
.sheet-no,
.stamp,
.label {
    font-family: "Helvetica Neue Condensed", "Arial Narrow", ui-sans-serif, sans-serif;
    font-stretch: condensed;
}

.masthead {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
    flex-wrap: wrap;
    padding: 1.75rem 0;
    border-bottom: 3px solid var(--ink);
}

.wordmark {
    display: inline-flex;
    align-items: center;
    gap: 0.55rem;
    color: inherit;
    text-decoration: none;
    font-size: 1.25rem;
    font-weight: 700;
    letter-spacing: 0.01em;
    text-transform: uppercase;
}

.wordmark img {
    display: block;
}

.stamp {
    margin: 0;
    color: var(--mark);
    font-size: 0.72rem;
    font-weight: 700;
    letter-spacing: 0.2em;
    text-transform: uppercase;
}

.hero {
    padding: 3.5rem 0 2.5rem;
}

.sheet-no {
    margin: 0 0 1.25rem;
    font-family: ui-monospace, "SF Mono", Menlo, Consolas, monospace;
    font-size: 0.72rem;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: var(--muted);
}

.hero h1 {
    margin: 0 0 1.5rem;
    font-size: clamp(2.4rem, 7.5vw, 4.2rem);
    line-height: 1.02;
    letter-spacing: -0.02em;
    font-weight: 700;
    text-transform: uppercase;
}

.lede {
    margin: 0;
    max-width: 34rem;
    font-size: 1.05rem;
}

.block {
    margin-top: 3.5rem;
    padding-top: 1.25rem;
    border-top: 1px solid var(--rule);
}

.block h2 {
    margin: 0 0 1.25rem;
    font-size: 0.78rem;
    font-weight: 700;
    letter-spacing: 0.2em;
    text-transform: uppercase;
    color: var(--mark);
}

.block p {
    margin: 0 0 1rem;
    max-width: 36rem;
}

.riser {
    margin: 0 0 2rem;
    padding: 1.25rem;
    background: var(--panel);
    border: 1px solid var(--rule);
}

.riser svg {
    display: block;
    width: 100%;
    height: auto;
}

.riser-slab line {
    stroke: var(--rule);
    stroke-width: 1;
}

.riser-main line {
    stroke: var(--mark);
    stroke-width: 3;
}

.riser-drop line {
    stroke: var(--mark);
    stroke-width: 1.5;
}

.riser-node circle {
    fill: var(--sheet);
    stroke: var(--mark);
    stroke-width: 1.5;
}

.riser-plant {
    fill: var(--ink);
}

.riser-label text {
    fill: var(--muted);
    font-family: ui-monospace, "SF Mono", Menlo, Consolas, monospace;
    font-size: 9px;
    letter-spacing: 0.12em;
}

.riser figcaption {
    margin-top: 1rem;
    font-size: 0.85rem;
    color: var(--muted);
    max-width: 30rem;
}

.specs {
    margin: 0;
    display: grid;
    gap: 0;
}

.specs > div {
    display: grid;
    grid-template-columns: 8rem 1fr;
    gap: 1.5rem;
    padding: 0.85rem 0;
    border-bottom: 1px solid var(--rule);
}

.specs > div:first-child {
    border-top: 1px solid var(--rule);
}

.specs dt {
    font-family: ui-monospace, "SF Mono", Menlo, Consolas, monospace;
    font-size: 0.75rem;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--muted);
    padding-top: 0.2rem;
}

.specs dd {
    margin: 0;
}

.ladder {
    width: 100%;
    border-collapse: collapse;
    margin: 1.5rem 0 0.75rem;
    font-size: 0.95rem;
}

.ladder caption {
    caption-side: top;
    text-align: left;
    margin-bottom: 0.6rem;
    font-size: 0.8rem;
    color: var(--muted);
}

.ladder th,
.ladder td {
    text-align: left;
    padding: 0.65rem 0.75rem 0.65rem 0;
    border-bottom: 1px solid var(--rule);
    vertical-align: baseline;
}

.ladder thead th {
    border-bottom: 2px solid var(--ink);
    font-family: ui-monospace, "SF Mono", Menlo, Consolas, monospace;
    font-size: 0.7rem;
    font-weight: 500;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: var(--muted);
}

.ladder tbody th {
    font-weight: 500;
}

.ladder td {
    font-family: ui-monospace, "SF Mono", Menlo, Consolas, monospace;
    font-size: 0.85rem;
    color: var(--muted);
}

.ladder tr.fixed th,
.ladder tr.fixed td {
    color: var(--ink);
    font-weight: 700;
}

.ladder tr.fixed td:last-child {
    color: var(--mark);
}

.fine {
    font-size: 0.85rem;
    color: var(--muted);
}

.colophon {
    margin-top: 4rem;
    padding-top: 1.25rem;
    border-top: 3px solid var(--ink);
    font-size: 0.85rem;
    color: var(--muted);
}

.colophon p {
    margin: 0 0 0.45rem;
}

.colophon a {
    color: inherit;
}

.label {
    display: inline-block;
    min-width: 5rem;
    font-size: 0.7rem;
    font-weight: 700;
    letter-spacing: 0.16em;
    text-transform: uppercase;
    color: var(--mark);
}

@media (max-width: 34rem) {
    .specs > div {
        grid-template-columns: 1fr;
        gap: 0.3rem;
    }
}

@media (prefers-color-scheme: dark) {
    :root {
        --sheet: #15171a;
        --grid: #1e2126;
        --ink: #e7e5df;
        --muted: #969aa1;
        --rule: #33373d;
        --mark: #f97316;
        --panel: #1b1e22;
    }

    .riser-plant {
        fill: var(--ink);
    }
}