/* MeasureLab guides — measure-lab.app
   The paper/ink look of the in-app measuring guide (approved 2026-10-19), with
   the app icon's gold. Light by default, dark by the visitor's setting. */
:root {
  --paper: #ece6d4;
  --paper-hi: #f7f3e8;
  --paper-lo: #dfd7c0;
  --ink: #1d221e;
  --ink-soft: #3a3f36;
  --muted: #76715f;
  --rule: #cfc6ab;
  --moss: #4a5545;
  --clay: #8c3923;
  --sun: #b97d17;
  --gold: #e5b35a;
  --coal: #1d221e;
  --on-coal: #ece4cf;
  --serif: "Instrument Serif", "Iowan Old Style", "Palatino Linotype", Georgia, serif;
  --sans: "Inter", system-ui, -apple-system, "Segoe UI", sans-serif;
  --mono: "IBM Plex Mono", ui-monospace, "SFMono-Regular", Consolas, monospace;
  color-scheme: light;
}
@media (prefers-color-scheme: dark) {
  :root {
    --paper: #26281f;
    --paper-hi: #30322a;
    --paper-lo: #1c1d17;
    --ink: #ece4cf;
    --ink-soft: #d3cbb4;
    --muted: #a39f88;
    --rule: #45473b;
    --moss: #b5b48a;
    --clay: #e09a86;
    --sun: #e5b35a;
    --coal: #141611;
    --on-coal: #ece4cf;
    color-scheme: dark;
  }
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font: 400 17px/1.65 var(--sans);
  text-rendering: optimizeLegibility;
}
a { color: inherit; text-decoration-color: color-mix(in srgb, currentColor 35%, transparent); text-underline-offset: 3px; }
a:hover { text-decoration-color: currentColor; }
img, svg { max-width: 100%; }

.wrap { max-width: 1080px; margin: 0 auto; padding-left: max(20px, env(safe-area-inset-left)); padding-right: max(20px, env(safe-area-inset-right)); }
.measure { max-width: 680px; }

/* Header: the brand, and a ruler running under it */
.site-head { padding-block: 18px 0; }
.site-head .wrap { display: flex; align-items: center; justify-content: space-between; gap: 16px; }
.brand { display: inline-flex; align-items: center; gap: 10px; text-decoration: none; font-weight: 600; letter-spacing: -0.01em; }
.brand img { width: 30px; height: 30px; border-radius: 8px; }
.head-cta { font-size: 14px; font-weight: 600; text-decoration: none; padding: 8px 14px; border-radius: 999px; border: 1px solid var(--rule); background: var(--paper-hi); }
.head-cta:hover { border-color: var(--ink); }
/* Centimetre ticks: tall every 10, middle every 5, short every 1. */
.ruler {
  --tick: color-mix(in srgb, var(--muted) 55%, transparent);
  height: 14px; margin-top: 16px; border-top: 1px solid var(--tick);
  background-image:
    linear-gradient(90deg, var(--tick) 1px, transparent 1px),
    linear-gradient(90deg, var(--tick) 1px, transparent 1px),
    linear-gradient(90deg, var(--tick) 1px, transparent 1px);
  background-size: 100px 13px, 50px 8px, 10px 4px;
  background-position: 20px 0, 20px 0, 20px 0;
  background-repeat: repeat-x;
}

/* Type */
h1, h2, h3 { font-family: var(--serif); font-weight: 400; letter-spacing: -0.01em; line-height: 1.08; text-wrap: balance; margin: 0; }
h1 { font-size: clamp(40px, 6.4vw, 68px); }
h2 { font-size: clamp(28px, 3.6vw, 38px); margin-top: 56px; }
h3 { font-size: 24px; margin-top: 32px; }
p { margin: 14px 0 0; }
.kicker { font: 500 12.5px/1 var(--mono); letter-spacing: 0.08em; text-transform: uppercase; color: var(--muted); }
.lede { font-size: 20px; line-height: 1.55; color: var(--ink-soft); margin-top: 18px; }
.muted { color: var(--muted); }
strong { font-weight: 600; }
.num { font-family: var(--mono); font-size: 0.92em; }

/* Home hero */
.hero { padding-block: 64px 24px; }
.hero h1 em { font-style: italic; color: var(--sun); }

/* Guide list */
.guides { display: grid; grid-template-columns: repeat(auto-fill, minmax(min(100%, 300px), 1fr)); gap: 14px; margin-top: 28px; padding: 0; list-style: none; }
.guide-card { display: flex; flex-direction: column; gap: 10px; height: 100%; padding: 22px 22px 20px; border-radius: 18px; background: var(--paper-hi); border: 1px solid var(--rule); text-decoration: none; transition: border-color .2s ease, transform .2s ease; }
.guide-card:hover { border-color: var(--ink); transform: translateY(-2px); }
.guide-card h3 { margin: 0; font-size: 26px; }
.guide-card p { margin: 0; color: var(--muted); font-size: 15.5px; line-height: 1.5; }
.guide-card .tag { font: 500 12px/1 var(--mono); color: var(--moss); letter-spacing: 0.04em; }
.guide-card.soon { opacity: .62; pointer-events: none; }

/* Article */
.article { padding-block: 44px 24px; }
.article .crumbs { font-size: 14px; color: var(--muted); }
.article .crumbs a { text-decoration: none; }
.article ul, .article ol { padding-left: 22px; margin: 14px 0 0; }
.article li + li { margin-top: 6px; }
.toc { margin-top: 28px; padding: 16px 20px; border-left: 3px solid var(--gold); background: var(--paper-hi); border-radius: 0 12px 12px 0; font-size: 15.5px; }
.toc ol { margin: 6px 0 0; }

/* Ways compared */
.ways { display: grid; gap: 12px; margin-top: 20px; }
.way { padding: 18px 20px; border-radius: 16px; border: 1px solid var(--rule); background: var(--paper-hi); }
.way h3 { margin: 0; font-size: 23px; }
.way .verdict { font: 500 12.5px/1.3 var(--mono); color: var(--muted); margin-top: 6px; }
.way p { margin-top: 8px; font-size: 16px; }

/* The worked example: a working mini calculator */
.calc { margin-top: 22px; border-radius: 20px; background: var(--coal); color: var(--on-coal); padding: 22px; display: grid; gap: 18px; grid-template-columns: 1fr 1fr; }
.calc .row { display: grid; gap: 6px; }
.calc label { font: 500 12.5px/1 var(--mono); letter-spacing: .05em; text-transform: uppercase; opacity: .7; }
.calc input { font: 500 18px/1 var(--mono); color: var(--on-coal); background: transparent; border: 0; border-bottom: 1.5px solid color-mix(in srgb, var(--on-coal) 35%, transparent); padding: 8px 0; width: 100%; min-width: 0; outline: none; }
.calc input:focus { border-bottom-color: var(--gold); }
.calc .out { grid-column: 1 / -1; display: flex; flex-wrap: wrap; align-items: baseline; justify-content: space-between; gap: 6px 16px; border-top: 1px dashed color-mix(in srgb, var(--on-coal) 25%, transparent); padding-top: 14px; }
.calc .total { font: 400 44px/1 var(--serif); color: var(--gold); }
.calc .how { font: 400 13.5px/1.5 var(--mono); opacity: .75; }
.calc-note { font-size: 14px; color: var(--muted); margin-top: 10px; }

/* Steps */
.steps { counter-reset: step; list-style: none; padding: 0 !important; margin-top: 18px !important; display: grid; gap: 10px; }
.steps li { counter-increment: step; position: relative; padding: 14px 16px 14px 56px; border-radius: 14px; background: var(--paper-hi); border: 1px solid var(--rule); margin: 0 !important; }
.steps li::before { content: counter(step, decimal-leading-zero); position: absolute; left: 16px; top: 15px; font: 500 14px/1.6 var(--mono); color: var(--sun); }

/* FAQ */
.faq details { border-top: 1px solid var(--rule); padding: 14px 0; }
.faq details:last-child { border-bottom: 1px solid var(--rule); }
.faq summary { cursor: pointer; font-weight: 600; list-style: none; display: flex; justify-content: space-between; gap: 12px; }
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after { content: "+"; font: 400 20px/1 var(--mono); color: var(--muted); }
.faq details[open] summary::after { content: "–"; }
.faq details p { margin-top: 8px; color: var(--ink-soft); }

/* Call to action */
.cta { margin-top: 56px; padding: 28px; border-radius: 22px; background: var(--coal); color: var(--on-coal); display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 18px; }
.cta h2 { margin: 0; font-size: clamp(26px, 3vw, 34px); color: var(--on-coal); }
.cta p { margin: 6px 0 0; opacity: .75; font-size: 15.5px; }
.btn { display: inline-flex; align-items: center; gap: 8px; padding: 13px 20px; border-radius: 999px; background: var(--gold); color: #1d221e; font-weight: 600; text-decoration: none; white-space: nowrap; }
.btn:hover { filter: brightness(1.05); }

/* Footer */
.site-foot { margin-top: 72px; padding-block: 24px 40px; border-top: 1px solid var(--rule); font-size: 14px; color: var(--muted); }
.site-foot .wrap { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 10px 24px; }
.site-foot a { text-decoration: none; }

@media (max-width: 640px) {
  body { font-size: 16.5px; }
  .calc { grid-template-columns: 1fr; padding: 18px; }
  .hero { padding-block: 40px 12px; }
  .cta { padding: 22px; }
}
@media (prefers-reduced-motion: reduce) { .guide-card { transition: none; } }

/* Dropdowns and checkboxes inside the worked examples */
.calc select { font: 500 16px/1.2 var(--mono); color: var(--on-coal); background: transparent; border: 0; border-bottom: 1.5px solid color-mix(in srgb, var(--on-coal) 35%, transparent); padding: 8px 0; width: 100%; outline: none; }
.calc select option { color: #1d221e; }
.calc select:focus { border-bottom-color: var(--gold); }
.calc .check { display: flex; align-items: center; gap: 10px; font: 500 14px/1.3 var(--sans); opacity: .9; text-transform: none; letter-spacing: 0; padding-top: 18px; }
.calc .check input { width: 18px; height: 18px; accent-color: var(--gold); }

/* A width × drop price grid, with the cell that applies highlighted */
.bands-wrap { overflow-x: auto; margin-top: 18px; }
.bands { border-collapse: collapse; font: 400 14px/1.2 var(--mono); min-width: 520px; width: 100%; }
.bands th, .bands td { border: 1px solid var(--rule); padding: 8px 10px; text-align: right; }
.bands th { background: var(--paper-hi); font-weight: 500; color: var(--muted); }
.bands td.on { background: var(--gold); color: #1d221e; font-weight: 500; }
.bands caption { caption-side: bottom; text-align: left; padding-top: 8px; font: 400 13px/1.4 var(--sans); color: var(--muted); }

/* Related guides */
.related { margin-top: 48px; }
.related ul { list-style: none; padding: 0 !important; display: grid; gap: 8px; }
.related a { display: flex; justify-content: space-between; gap: 12px; padding: 12px 16px; border-radius: 12px; border: 1px solid var(--rule); background: var(--paper-hi); text-decoration: none; font-weight: 500; }
.related a:hover { border-color: var(--ink); }
.related a span { color: var(--muted); font: 400 13px/1.6 var(--mono); }