@import url('https://fonts.googleapis.com/css2?family=DM+Mono:wght@400;500&family=Manrope:wght@400;500;600;700;800&display=swap');

:root {
  --paper: #f7f3ea;
  --paper-deep: #efe8db;
  --ink: #18312d;
  --muted: #63736c;
  --spruce: #164b43;
  --spruce-dark: #103a34;
  --spruce-pale: #dce9e2;
  --clay: #d69572;
  --clay-pale: #f2d9c9;
  --line: #d7d7cc;
  --white: #fffdf8;
  --shadow: 0 16px 40px rgba(25, 49, 45, .11);
  --mono: "DM Mono", ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  --sans: "Manrope", Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; color: var(--ink); background: var(--paper); font-family: var(--sans); line-height: 1.6; }
a { color: inherit; text-decoration: none; }
button, input, select, textarea { font: inherit; }
button, select { cursor: pointer; }
button:focus-visible, a:focus-visible, input:focus-visible, select:focus-visible, summary:focus-visible { outline: 3px solid var(--clay); outline-offset: 3px; }
img { display: block; }
h1, h2, h3, p { margin-top: 0; }
h1, h2, h3 { color: var(--ink); line-height: 1.08; letter-spacing: -.045em; }
h1 { font-size: clamp(2.65rem, 6vw, 5.55rem); max-width: 13ch; margin-bottom: 1.25rem; }
h2 { font-size: clamp(1.8rem, 3vw, 3.1rem); margin-bottom: .8rem; }
h3 { font-size: 1.15rem; margin-bottom: .5rem; }
p { color: var(--muted); }
.shell { width: min(1160px, calc(100% - 2.5rem)); margin: 0 auto; }
.sr-only { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0,0,0,0); white-space: nowrap; border: 0; }
.skip-link { position: fixed; z-index: 20; left: 1rem; top: -4rem; padding: .7rem 1rem; color: var(--white); background: var(--spruce); border-radius: 0 0 .5rem .5rem; transition: top .16s ease; }
.skip-link:focus { top: 0; }
.eyebrow { margin-bottom: .65rem; color: var(--spruce); font-family: var(--mono); font-size: .73rem; font-weight: 500; letter-spacing: .095em; text-transform: uppercase; }
.lede { max-width: 62ch; font-size: clamp(1rem, 1.4vw, 1.18rem); line-height: 1.75; }

/* Header */
.site-header { position: sticky; top: 0; z-index: 10; border-bottom: 1px solid rgba(24,49,45,.1); background: rgba(247,243,234,.93); backdrop-filter: blur(18px); }
.header-inner { min-height: 76px; display: flex; align-items: center; justify-content: space-between; gap: 1.25rem; }
.brand { display: inline-flex; align-items: center; gap: .58rem; color: var(--ink); font-size: 1.05rem; font-weight: 800; letter-spacing: -.06em; white-space: nowrap; }
.brand img { width: 36px; height: 36px; }
.brand b { padding: .1rem .28rem; margin-left: .12rem; border-radius: .2rem; color: var(--paper); background: var(--spruce); font-family: var(--mono); font-size: .66rem; letter-spacing: .055em; vertical-align: .12rem; }
.brand-dot { color: var(--clay); }
.main-nav { display: flex; align-items: center; gap: 1.45rem; color: #40544e; font-size: .88rem; font-weight: 700; }
.main-nav > a:not(.button) { position: relative; }
.main-nav > a:not(.button)::after { content: ""; position: absolute; height: 2px; left: 0; right: 0; bottom: -7px; background: var(--clay); transform: scaleX(0); transform-origin: left; transition: transform .16s ease; }
.main-nav > a:not(.button):hover::after { transform: scaleX(1); }
.menu-button { display: none; width: 42px; height: 42px; padding: .55rem; border: 1px solid var(--line); border-radius: .45rem; background: var(--white); }
.menu-button span:not(.sr-only) { display: block; height: 2px; margin: 4px 0; background: var(--spruce); }

.button { display: inline-flex; align-items: center; justify-content: center; gap: .55rem; min-height: 48px; padding: .8rem 1.1rem; border: 1px solid var(--spruce); border-radius: .4rem; color: var(--paper); background: var(--spruce); font-weight: 800; font-size: .86rem; transition: transform .16s ease, background .16s ease; }
.button:hover { transform: translateY(-2px); background: var(--spruce-dark); }
.button-small { min-height: 38px; padding: .52rem .75rem; font-size: .78rem; }
.button-light { color: var(--spruce); border-color: var(--white); background: var(--white); }
.button-light:hover { background: var(--paper); }
.text-button { padding: 0; border: 0; color: var(--spruce); background: transparent; font-weight: 800; font-size: .87rem; }
.text-button:hover { color: var(--clay); }

/* Homepage */
.home-hero { position: relative; padding: clamp(3rem, 5.2vw, 5.5rem) 0 clamp(4rem, 6vw, 5rem); background: var(--paper); }
.home-hero::before, .tool-hero::before { content: ""; position: absolute; inset: 0; pointer-events: none; opacity: .5; background-image: linear-gradient(rgba(22,75,67,.06) 1px, transparent 1px), linear-gradient(90deg, rgba(22,75,67,.06) 1px, transparent 1px); background-size: 24px 24px; mask-image: linear-gradient(100deg, black 0%, transparent 70%); }
.home-hero-grid { position: relative; display: grid; grid-template-columns: 1.1fr .7fr; align-items: center; gap: clamp(2.3rem, 7vw, 8rem); }
.hero-copy { position: relative; z-index: 3; }
.home-hero h1 { max-width: 11ch; }
.home-hero h1 em { color: var(--spruce); font-style: normal; }
.hero-actions { display: flex; align-items: center; gap: 1.35rem; margin: 1.7rem 0 1.25rem; }
.home-hero .hero-actions { margin-top: 1.15rem; }
.calculator-finder-home { width: min(100%, 620px); margin-top: 1.55rem; }
.calculator-finder-home .calculator-finder-results { z-index: 6; }
.hero-disclaimer { max-width: 57ch; margin: 0; font-size: .76rem; }
.hero-measure-card { position: relative; z-index: 1; width: min(100%, 365px); justify-self: end; padding: 1.5rem; border: 1px solid rgba(22,75,67,.18); border-radius: .8rem; background: var(--white); box-shadow: var(--shadow); transform: rotate(2deg); }
.hero-measure-card::before { content: ""; position: absolute; inset: 10px; border: 1px dashed rgba(22,75,67,.22); border-radius: .4rem; pointer-events: none; }
.measure-card-top, .measure-row, .measure-footer { position: relative; display: flex; justify-content: space-between; align-items: center; gap: 1rem; }
.measure-card-top { color: var(--spruce); font-family: var(--mono); font-size: .7rem; text-transform: uppercase; letter-spacing: .07em; }
.measure-card-top b { padding: .23rem .45rem; color: var(--paper); background: var(--spruce); border-radius: .2rem; }
.measure-rule { position: relative; height: 1px; margin: 1.5rem 0 .5rem; background: var(--line); }
.measure-row { padding: .68rem 0; font-size: .88rem; }
.measure-row b, .measure-footer b { font-family: var(--mono); font-size: .86rem; }
.measure-row.muted { color: var(--muted); }
.measure-row.strong { margin: .25rem -.5rem; padding: .8rem .5rem; color: var(--spruce); background: var(--spruce-pale); border-radius: .2rem; }
.measure-footer { margin-top: .95rem; padding-top: .95rem; border-top: 1px solid var(--line); color: var(--clay); font-size: .75rem; }

@media (min-width: 901px) {
  .home-hero { padding-top: clamp(2rem, 3.4vw, 4.25rem); }
}

.featured-section, .category-section, .related-section { padding: clamp(4rem, 7vw, 7rem) 0; }
.section-heading { display: flex; justify-content: space-between; align-items: end; gap: 2rem; margin-bottom: 2rem; }
.section-heading h2 { margin-bottom: 0; }
.calculator-card-grid { display: grid; grid-template-columns: repeat(4, 1fr); border-top: 1px solid var(--line); border-left: 1px solid var(--line); }
.calculator-card { position: relative; display: flex; min-height: 285px; flex-direction: column; padding: 1.45rem; border-right: 1px solid var(--line); border-bottom: 1px solid var(--line); background: var(--paper); transition: background .16s ease, transform .16s ease; }
.calculator-card:hover { z-index: 1; background: var(--white); box-shadow: var(--shadow); transform: translateY(-4px); }
.card-index { margin-bottom: 1.55rem; color: var(--clay); font-family: var(--mono); font-size: .72rem; }
.calculator-card small, .related-card small { color: var(--spruce); font-family: var(--mono); font-size: .68rem; letter-spacing: .07em; text-transform: uppercase; }
.calculator-card h3 { margin-top: .5rem; font-size: 1.3rem; }
.calculator-card p { margin-bottom: 1.4rem; font-size: .82rem; line-height: 1.6; }
.card-link { margin-top: auto; color: var(--spruce); font-size: .78rem; font-weight: 800; }
.card-link i { color: var(--clay); font-style: normal; }
.how-section { padding: clamp(4rem, 8vw, 7rem) 0; color: var(--paper); background: var(--spruce); }
.how-section .eyebrow { color: var(--clay-pale); }
.how-section h2, .how-section h3 { color: var(--paper); }
.steps { display: grid; grid-template-columns: repeat(3, 1fr); gap: 0; margin-top: 2.8rem; border-top: 1px solid rgba(255,255,255,.27); }
.steps article { padding: 1.65rem 1.7rem 1.2rem 0; border-right: 1px solid rgba(255,255,255,.27); }
.steps article + article { padding-left: 1.7rem; }
.steps article:last-child { border-right: 0; }
.steps span { display: block; margin-bottom: 2.3rem; color: var(--clay); font-family: var(--mono); font-size: .72rem; }
.steps p { color: #d8e5de; font-size: .87rem; }
.trust-section { padding: clamp(4rem, 8vw, 7.5rem) 0; background: var(--paper-deep); }
.trust-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 5rem; align-items: start; }
.trust-grid h2 { max-width: 11ch; }
.trust-grid p { font-size: 1.05rem; line-height: 1.8; }
.category-list { border-top: 1px solid var(--line); }
.category-link { display: grid; grid-template-columns: .75fr 1.5fr auto; gap: 1.4rem; align-items: center; padding: 1.3rem .25rem; border-bottom: 1px solid var(--line); transition: padding .16s ease, background .16s ease; }
.category-link:hover { padding-right: .9rem; padding-left: .9rem; background: var(--white); }
.category-link > span { font-weight: 800; }
.category-link p { margin: 0; font-size: .82rem; }
.category-link i { color: var(--clay); font-size: 1.3rem; font-style: normal; }
.closing-section { padding: 3.5rem 0; color: var(--paper); background: var(--ink); }
.closing-inner { display: flex; align-items: center; justify-content: space-between; gap: 2.5rem; }
.closing-section h2 { max-width: 16ch; margin-bottom: .6rem; color: var(--paper); }
.closing-section .eyebrow { color: var(--clay); }
.closing-section p { max-width: 58ch; margin-bottom: 0; color: #ccd9d2; }

/* Shared pages */
.page-hero { padding: clamp(4rem, 8vw, 7.5rem) 0 clamp(3rem, 5vw, 5rem); background: var(--paper-deep); }
.page-hero h1 { max-width: 14ch; }
.breadcrumb { display: flex; gap: .5rem; margin-bottom: 1.5rem; color: var(--muted); font-family: var(--mono); font-size: .7rem; }
.breadcrumb a { color: var(--spruce); }
.calculator-library-hero { position: relative; z-index: 1; }
.calculator-finder { position: relative; z-index: 2; width: min(100%, 720px); margin-top: 2rem; }
.calculator-finder-label { display: block; margin-bottom: .55rem; color: var(--spruce); font-family: var(--mono); font-size: .74rem; font-weight: 700; letter-spacing: .06em; text-transform: uppercase; }
.calculator-finder-control { position: relative; display: flex; align-items: center; min-height: 62px; border: 1px solid rgba(22,75,67,.28); border-radius: .55rem; background: var(--white); box-shadow: 0 12px 26px rgba(25,49,45,.08); transition: border-color .16s ease, box-shadow .16s ease; }
.calculator-finder-control:focus-within { border-color: var(--spruce); box-shadow: 0 0 0 4px rgba(214,149,114,.3), 0 12px 26px rgba(25,49,45,.08); }
.calculator-finder-icon { display: grid; width: 3.5rem; place-items: center; color: var(--spruce); font-size: 1.65rem; line-height: 1; pointer-events: none; }
.calculator-finder input { width: 100%; min-width: 0; height: 60px; padding: .9rem 3.3rem .9rem 0; border: 0; outline: 0; color: var(--ink); background: transparent; font-size: 1rem; font-weight: 600; }
.calculator-finder input::placeholder { color: #829087; font-weight: 500; }
.calculator-finder-clear { position: absolute; right: .65rem; display: grid; width: 2.15rem; height: 2.15rem; place-items: center; border: 0; border-radius: .3rem; color: var(--spruce); background: var(--spruce-pale); font-size: 1.35rem; line-height: 1; }
.calculator-finder-clear:hover { color: var(--paper); background: var(--spruce); }
.calculator-finder-results { position: absolute; top: calc(100% + .5rem); left: 0; right: 0; overflow: hidden; max-height: min(440px, 56vh); border: 1px solid rgba(22,75,67,.2); border-radius: .55rem; background: var(--white); box-shadow: var(--shadow); }
.calculator-finder-option { position: relative; display: grid; grid-template-columns: 1fr auto; gap: .08rem 1rem; padding: .92rem 1rem; border-bottom: 1px solid var(--line); background: var(--white); transition: background .15s ease; }
.calculator-finder-option:last-child { border-bottom: 0; }
.calculator-finder-option:hover, .calculator-finder-option[aria-selected="true"] { background: var(--spruce-pale); }
.calculator-finder-option small { grid-column: 1; color: var(--spruce); font-family: var(--mono); font-size: .66rem; font-weight: 700; letter-spacing: .06em; text-transform: uppercase; }
.calculator-finder-option strong { grid-column: 1; color: var(--ink); font-size: .95rem; }
.calculator-finder-option span { grid-column: 1; color: var(--muted); font-size: .76rem; line-height: 1.45; }
.calculator-finder-option i { grid-column: 2; grid-row: 1 / span 3; align-self: center; color: var(--clay); font-size: 1.15rem; font-style: normal; }
.calculator-finder-help, .calculator-finder-noscript { margin: .7rem 0 0; color: var(--muted); font-size: .75rem; }
.calculator-finder-help button { padding: 0; border: 0; color: var(--spruce); background: transparent; font: inherit; font-weight: 800; text-decoration: underline; text-underline-offset: .18em; }
.calculator-finder-help button:hover { color: var(--clay); }
.hub-list { padding: 4rem 0 6rem; }
.hub-group { display: grid; grid-template-columns: 280px 1fr; gap: 3rem; padding: 3.5rem 0; border-bottom: 1px solid var(--line); }
.hub-group:first-child { padding-top: 0; }
.hub-group h2 { font-size: 1.65rem; }
.hub-group > div > p:last-child { font-size: .88rem; }
.hub-cards { display: grid; grid-template-columns: repeat(2, 1fr); border-top: 1px solid var(--line); border-left: 1px solid var(--line); }
.hub-cards .calculator-card { min-height: 220px; }
.content-section { padding: 5rem 0 7rem; }
.prose { font-size: 1rem; }
.prose.narrow { max-width: 780px; }
.prose h2 { margin-top: 2.7rem; font-size: 1.65rem; }
.prose p { max-width: 68ch; }
.prose code { padding: .1rem .3rem; border-radius: .2rem; color: var(--spruce); background: var(--spruce-pale); font-family: var(--mono); font-size: .84em; }
.prose-callout { margin-top: 2rem; padding: 1.2rem 1.3rem; border-left: 4px solid var(--clay); background: var(--paper-deep); color: var(--ink); }

/* Calculator pages */
.tool-hero { position: relative; overflow: hidden; padding: 2rem 0 3.5rem; }
.tool-heading { position: relative; display: flex; justify-content: space-between; align-items: end; gap: 2.5rem; padding-bottom: 2.25rem; }
.tool-heading h1 { margin-bottom: .9rem; font-size: clamp(2.2rem, 4.5vw, 4.55rem); }
.tool-heading .lede { margin-bottom: 0; }
.formula-stamp { max-width: 255px; padding: .75rem .9rem; border: 1px solid rgba(22,75,67,.22); border-radius: .35rem; color: var(--spruce); background: rgba(255,253,248,.76); font-family: var(--mono); font-size: .66rem; line-height: 1.45; }
.formula-stamp span { display: block; margin-bottom: .3rem; color: var(--muted); text-transform: uppercase; letter-spacing: .06em; }
.noscript-note { position: relative; margin-bottom: 1rem; padding: .85rem 1rem; border-left: 3px solid var(--clay); background: var(--clay-pale); color: var(--ink); font-size: .84rem; }
.calculator-workbench { position: relative; display: grid; grid-template-columns: 1.15fr .85fr; overflow: hidden; border: 1px solid rgba(22,75,67,.18); border-radius: .8rem; background: var(--white); box-shadow: var(--shadow); }
.calculator-form { padding: clamp(1.4rem, 3vw, 2.4rem); }
.form-kicker, .results-kicker { display: flex; align-items: center; gap: .6rem; margin-bottom: 1.55rem; color: var(--spruce); font-family: var(--mono); font-size: .7rem; letter-spacing: .04em; text-transform: uppercase; }
.form-kicker span, .results-kicker span { display: inline-grid; width: 1.55rem; height: 1.55rem; place-items: center; border-radius: 50%; color: var(--paper); background: var(--spruce); }
.form-topline { display: flex; align-items: end; justify-content: space-between; gap: 1rem; margin-bottom: 1.25rem; }
.form-note { margin: 0; font-size: .75rem; }
.unit-picker { display: flex; min-width: 132px; flex-direction: column; gap: .2rem; color: var(--spruce); font-family: var(--mono); font-size: .64rem; text-transform: uppercase; letter-spacing: .06em; }
.unit-picker select { padding: .38rem .45rem; border: 1px solid var(--line); border-radius: .25rem; color: var(--ink); background: var(--white); font-family: var(--sans); font-size: .78rem; }
fieldset { min-width: 0; margin: 0; padding: 0; border: 0; }
legend { margin-bottom: .75rem; color: var(--ink); font-size: .92rem; font-weight: 800; }
.field-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: .82rem; }
.field { display: flex; min-width: 0; flex-direction: column; gap: .3rem; }
.field-label { color: #43564f; font-size: .73rem; font-weight: 800; line-height: 1.35; }
.field-label em { color: var(--muted); font-style: normal; font-weight: 500; }
.field-unit { color: var(--spruce); font-family: var(--mono); font-size: .72rem; font-weight: 500; }
.field input, .field select { width: 100%; min-height: 43px; padding: .57rem .62rem; border: 1px solid #cbd2ca; border-radius: .3rem; color: var(--ink); background: #fffefa; font-variant-numeric: tabular-nums; }
.field input[aria-invalid="true"] { border-color: #b84432; background: #fff3ef; }
.field small { color: var(--muted); font-size: .64rem; line-height: 1.35; }
.check-stack { display: grid; grid-template-columns: 1fr 1fr; gap: .6rem; margin-top: 1rem; }
.check-field { display: flex; align-items: start; gap: .5rem; padding: .7rem; border: 1px solid var(--line); border-radius: .3rem; background: #fffefa; cursor: pointer; }
.check-field input { width: 1rem; height: 1rem; margin: .15rem 0 0; accent-color: var(--spruce); }
.check-field b { display: block; font-size: .73rem; }
.check-field small { display: block; margin-top: .1rem; color: var(--muted); font-size: .62rem; line-height: 1.35; }
.inline-action { margin-top: 1rem; }
.transfer-use { padding: .3rem 0; font-size: .75rem; }
.validation-message { min-height: 1.2rem; margin: .8rem 0 0; color: #ae3828; font-size: .75rem; font-weight: 700; }
.results-panel { display: flex; flex-direction: column; padding: clamp(1.4rem, 3vw, 2.4rem); color: var(--paper); background: var(--spruce); }
.results-panel .results-kicker { color: #e8f4ee; }
.results-panel .results-kicker span { color: var(--spruce); background: var(--clay); }
.results-panel h2 { max-width: 20ch; margin-bottom: 1.35rem; color: var(--paper); font-size: clamp(1.45rem, 2.2vw, 2rem); letter-spacing: -.035em; }
.result-list { border-top: 1px solid rgba(255,255,255,.25); }
.result-line { display: grid; grid-template-columns: minmax(90px, .8fr) 1.2fr; align-items: baseline; gap: 1rem; padding: .72rem 0; border-bottom: 1px solid rgba(255,255,255,.2); }
.result-line span { color: #cae0d6; font-size: .71rem; }
.result-line output { color: var(--paper); font-family: var(--mono); font-size: .74rem; font-variant-numeric: tabular-nums; text-align: right; }
.result-line.result-primary output { color: #ffd7bd; font-size: .93rem; font-weight: 500; }
.formula-version { margin: 1rem 0 0; color: #b9d2c6; font-family: var(--mono); font-size: .62rem; line-height: 1.5; }
.result-actions { display: flex; flex-wrap: wrap; align-items: center; gap: .7rem 1rem; margin-top: auto; padding-top: 1.25rem; }
.result-actions .text-button { color: #e0eee8; font-size: .73rem; }
.result-actions .text-button:hover { color: var(--clay-pale); }
.quote-inputs { display: grid; gap: .65rem; margin-top: 1.15rem; padding-top: 1rem; border-top: 1px solid rgba(255,255,255,.2); }
.quote-inputs label { display: grid; gap: .25rem; color: #d8e8e0; font-size: .67rem; font-weight: 800; }
.quote-inputs label span em { color: #b9d2c6; font-style: normal; font-weight: 500; }
.quote-inputs input, .quote-inputs textarea { width: 100%; padding: .52rem .58rem; border: 1px solid rgba(255,255,255,.35); border-radius: .28rem; color: var(--ink); background: #fffefa; font-size: .73rem; resize: vertical; }
.quote-inputs textarea { min-height: 66px; }
.supplier-cta { margin-top: 1rem; padding: .9rem; border: 1px solid rgba(255,255,255,.3); border-radius: .42rem; background: rgba(255,255,255,.08); }
.supplier-cta > p { margin-bottom: .3rem; color: #ffd7bd; font-family: var(--mono); font-size: .58rem; font-weight: 500; letter-spacing: .08em; text-transform: uppercase; }
.supplier-cta h3 { margin: 0 0 .4rem; color: var(--paper); font-size: 1rem; letter-spacing: -.03em; }
.supplier-cta > span { display: block; color: #cfe1d8; font-size: .7rem; line-height: 1.5; }
.supplier-cta .text-button { margin-top: .65rem; color: var(--paper); font-size: .72rem; }
.supplier-cta .text-button:hover { color: var(--clay-pale); }
.supplier-cta small { display: block; margin-top: .5rem; color: #b9d2c6; font-size: .62rem; line-height: 1.4; }
.quote-dialog { width: min(980px, calc(100vw - 2rem)); height: min(900px, calc(100vh - 2rem)); padding: 0; overflow: hidden; border: 1px solid var(--line); border-radius: .65rem; background: var(--paper); box-shadow: 0 22px 70px rgba(12,36,31,.38); }
.quote-dialog::backdrop { background: rgba(14,36,31,.62); backdrop-filter: blur(4px); }
.quote-dialog-bar { display: flex; align-items: center; justify-content: space-between; gap: 1rem; min-height: 68px; padding: .75rem 1rem; border-bottom: 1px solid var(--line); background: var(--paper); }
.quote-dialog-bar p { margin: 0; color: var(--spruce); font-family: var(--mono); font-size: .59rem; font-weight: 500; letter-spacing: .08em; text-transform: uppercase; }
.quote-dialog-bar strong { display: block; font-size: .94rem; letter-spacing: -.02em; }
.quote-dialog-bar .text-button { white-space: nowrap; }
.quote-dialog iframe { display: block; width: 100%; height: calc(100% - 68px); border: 0; background: #eef0ea; }
.transfer-block { margin-top: 1rem; padding-top: 1rem; border-top: 1px solid rgba(255,255,255,.2); }
.transfer-block p { margin: .55rem 0 0; color: #cce2d8; font-size: .68rem; line-height: 1.45; }
.boundary { position: relative; max-width: 900px; margin: 1.2rem auto 0; padding: .8rem 1rem; border-left: 3px solid var(--clay); color: #40564f; background: rgba(242,217,201,.55); font-size: .8rem; }
.boundary strong { color: var(--ink); }
.detail-section { padding: clamp(3.8rem, 6vw, 6rem) 0; background: var(--white); }
.detail-section-alt { background: var(--paper-deep); }
.detail-grid { display: grid; grid-template-columns: 1.2fr .8fr; gap: clamp(2rem, 6vw, 6rem); align-items: start; }
.detail-copy > p { max-width: 53ch; }
.audit-list { display: grid; gap: 0; margin: 1.7rem 0 0; padding: 0; list-style: none; border-top: 1px solid var(--line); }
.audit-row { display: grid; grid-template-columns: 34px 1fr minmax(95px, auto); align-items: center; gap: .85rem; padding: .8rem 0; border-bottom: 1px solid var(--line); }
.audit-step { color: var(--clay); font-family: var(--mono); font-size: .67rem; }
.audit-row strong { display: block; font-size: .79rem; }
.audit-row small { display: block; color: var(--muted); font-size: .66rem; line-height: 1.45; }
.audit-row output { color: var(--spruce); font-family: var(--mono); font-size: .7rem; font-variant-numeric: tabular-nums; text-align: right; }
.assumption-card { padding: 1.4rem; border: 1px solid var(--line); border-radius: .55rem; background: var(--paper); }
.assumption-card h2 { font-size: 1.45rem; }
.assumption-card details { padding: .7rem 0; border-top: 1px solid var(--line); }
.assumption-card summary { color: var(--ink); cursor: pointer; font-size: .78rem; font-weight: 800; }
.assumption-card details p { margin: .55rem 0 0; font-size: .73rem; line-height: 1.55; }
.guidance-grid { display: grid; grid-template-columns: 1fr 1fr; gap: clamp(2rem, 7vw, 8rem); align-items: center; }
.guidance-grid > div > p:not(.eyebrow) { max-width: 49ch; }
.measure-diagram { margin: 1.8rem 0 0; padding: 1rem; border: 1px solid var(--line); border-radius: .5rem; background: var(--white); }
.measure-diagram svg { width: 100%; height: auto; max-height: 255px; }
.measure-diagram figcaption { margin-top: .3rem; color: var(--muted); font-size: .67rem; }
.worked-example { padding: clamp(1.45rem, 3vw, 2.4rem); border-radius: .6rem; color: var(--paper); background: var(--ink); }
.worked-example h2 { color: var(--paper); font-size: 1.9rem; }
.worked-example .eyebrow { color: var(--clay); }
.worked-example p { color: #d4dfd9; }
.example-note { display: flex; gap: .65rem; margin-top: 1.5rem; padding-top: 1rem; border-top: 1px solid rgba(255,255,255,.18); color: #d4dfd9; font-size: .74rem; line-height: 1.45; }
.example-note b { min-width: max-content; color: var(--clay); }
.review-grid { display: flex; justify-content: space-between; align-items: end; gap: 2rem; }
.review-grid > div { max-width: 720px; }
.review-grid p { margin-bottom: 0; font-size: .87rem; }
.source-button { white-space: nowrap; }
.related-section { background: var(--paper); }
.related-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1rem; }
.related-card { display: flex; min-height: 190px; flex-direction: column; padding: 1.25rem; border: 1px solid var(--line); border-radius: .5rem; background: var(--white); transition: transform .16s ease, box-shadow .16s ease; }
.related-card:hover { box-shadow: var(--shadow); transform: translateY(-3px); }
.related-card strong { display: block; margin: .45rem 0; font-size: 1.1rem; letter-spacing: -.035em; }
.related-card span { color: var(--muted); font-size: .73rem; line-height: 1.55; }
.related-card i { margin-top: auto; padding-top: 1rem; color: var(--spruce); font-size: .74rem; font-style: normal; font-weight: 800; }

/* Footer */
.site-footer { padding: 3.8rem 0 1.2rem; color: #d2e0d8; background: var(--ink); }
.footer-grid { display: grid; grid-template-columns: 1.4fr .7fr .7fr; gap: 3rem; padding-bottom: 3rem; }
.brand-footer { color: var(--paper); }
.site-footer p { max-width: 32ch; margin-top: 1rem; color: #abc2b7; font-size: .78rem; }
.site-footer h2 { margin: 0 0 .7rem; color: var(--paper); font-family: var(--mono); font-size: .67rem; letter-spacing: .08em; text-transform: uppercase; }
.site-footer ul { display: grid; gap: .35rem; margin: 0; padding: 0; list-style: none; }
.site-footer li { font-size: .77rem; }
.site-footer li a:hover { color: var(--clay); }
.footer-link { padding: 0; border: 0; color: inherit; background: transparent; font: inherit; text-align: left; }
.footer-link:hover { color: var(--clay); }
.footer-bottom { display: flex; justify-content: space-between; gap: 1rem; padding-top: 1.2rem; border-top: 1px solid rgba(255,255,255,.14); color: #90aa9d; font-family: var(--mono); font-size: .6rem; }
.scroll-top { position: fixed; z-index: 9; right: 1.2rem; bottom: 1.2rem; display: grid; width: 44px; height: 44px; place-items: center; border: 1px solid rgba(22,75,67,.35); border-radius: 50%; color: var(--paper); background: var(--spruce); box-shadow: 0 8px 20px rgba(24,49,45,.22); font-size: 1.15rem; transition: transform .16s ease, background .16s ease; }
.scroll-top:hover { background: var(--spruce-dark); transform: translateY(-2px); }
.analytics-consent { position: fixed; z-index: 18; right: 1.25rem; bottom: 1.25rem; left: 1.25rem; display: flex; max-width: 820px; align-items: end; justify-content: space-between; gap: 1.25rem; margin-left: auto; padding: 1.15rem 1.25rem; border: 1px solid rgba(22,75,67,.25); border-radius: .65rem; color: var(--ink); background: var(--white); box-shadow: 0 18px 45px rgba(24,49,45,.22); }
.analytics-consent[hidden] { display: none; }
.analytics-consent .eyebrow { margin-bottom: .3rem; font-size: .62rem; }
.analytics-consent h2 { margin-bottom: .3rem; font-size: 1.15rem; }
.analytics-consent p { max-width: 62ch; margin-bottom: .35rem; font-size: .73rem; line-height: 1.55; }
.analytics-consent a { color: var(--spruce); font-size: .72rem; font-weight: 800; text-decoration: underline; text-underline-offset: .18em; }
.analytics-consent-actions { display: flex; flex: 0 0 auto; align-items: center; gap: .8rem; }
.analytics-consent-actions .text-button { white-space: nowrap; }

@media (max-width: 900px) {
  .calculator-card-grid { grid-template-columns: repeat(2, 1fr); }
  .home-hero-grid, .trust-grid, .detail-grid, .guidance-grid { grid-template-columns: 1fr; }
  .home-hero-grid { gap: 2.5rem; }
  .hero-measure-card { justify-self: start; }
  .tool-heading { display: block; }
  .formula-stamp { margin-top: 1.2rem; }
  .calculator-workbench { grid-template-columns: 1fr; }
  .results-panel { min-height: 350px; }
  .hub-group { grid-template-columns: 1fr; gap: 1.3rem; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .footer-grid > :first-child { grid-column: 1 / -1; }
}

@media (max-width: 800px) {
  .header-inner { min-height: 68px; }
  .menu-button { display: block; }
  .main-nav { position: absolute; top: 68px; left: 0; right: 0; display: none; flex-direction: column; align-items: stretch; gap: 0; padding: .75rem; border-bottom: 1px solid var(--line); background: var(--paper); box-shadow: 0 12px 18px rgba(0,0,0,.07); }
  .main-nav[data-open="true"] { display: flex; }
  .main-nav a { padding: .78rem .55rem; }
  .main-nav .button { margin-top: .35rem; }
  .main-nav > a:not(.button)::after { display: none; }
}

@media (max-width: 680px) {
  .shell { width: min(100% - 1.4rem, 1160px); }
  h1 { font-size: clamp(2.45rem, 12vw, 4.1rem); }
  .hero-actions { align-items: start; flex-direction: column; gap: 1rem; }
  .calculator-finder { margin-top: 1.6rem; }
  .calculator-finder-control { min-height: 58px; }
  .calculator-finder input { height: 56px; font-size: .9rem; }
  .calculator-finder-icon { width: 3rem; font-size: 1.45rem; }
  .calculator-finder-results { max-height: 50vh; }
  .calculator-finder-option { padding: .82rem .85rem; }
  .calculator-finder-option span { font-size: .72rem; }
  .calculator-finder-help { font-size: .7rem; line-height: 1.55; }
  .calculator-card-grid, .hub-cards { grid-template-columns: 1fr; }
  .calculator-card { min-height: 205px; }
  .steps { grid-template-columns: 1fr; }
  .steps article, .steps article + article { padding: 1.25rem 0; border-right: 0; border-bottom: 1px solid rgba(255,255,255,.27); }
  .steps article:last-child { border-bottom: 0; }
  .steps span { margin-bottom: .8rem; }
  .category-link { grid-template-columns: 1fr auto; padding: 1rem 0; }
  .category-link p { grid-column: 1 / -1; }
  .category-link i { grid-column: 2; grid-row: 1; }
  .closing-inner, .review-grid, .section-heading, .footer-bottom { align-items: start; flex-direction: column; }
  .field-grid, .check-stack { grid-template-columns: 1fr; }
  .form-topline { align-items: start; flex-direction: column; }
  .unit-picker { width: 100%; }
  .unit-picker select { max-width: 180px; }
  .tool-hero { padding-top: 1.5rem; }
  .tool-heading { padding-bottom: 1.5rem; }
  .calculator-workbench { border-radius: .55rem; }
  .result-line { grid-template-columns: 1fr; gap: .15rem; }
  .result-line output { text-align: left; }
  .audit-row { grid-template-columns: 26px 1fr; }
  .audit-row output { grid-column: 2; text-align: left; }
  .related-grid { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; gap: 2rem; }
  .footer-grid > :first-child { grid-column: auto; }
  .footer-bottom { gap: .4rem; }
  .analytics-consent { right: .7rem; bottom: .7rem; left: .7rem; align-items: start; flex-direction: column; gap: .75rem; padding: 1rem; }
  .analytics-consent-actions { width: 100%; justify-content: space-between; }
  .scroll-top { right: .8rem; bottom: .8rem; }
  .quote-dialog { width: calc(100vw - 1rem); height: calc(100vh - 1rem); border-radius: .45rem; }
}

@media print {
  .site-header, .site-footer, .skip-link, .button, .text-button, .menu-button, .related-section, .boundary, .measure-diagram, .quote-inputs, .supplier-cta, .scroll-top, .quote-dialog { display: none !important; }
  body, .results-panel, .detail-section, .tool-hero { background: #fff !important; color: #111 !important; }
  .tool-hero { padding: 0 !important; }
  .calculator-workbench { display: block; border: 0; box-shadow: none; }
  .calculator-form { display: none; }
  .results-panel { padding: 0; }
  .results-panel *, .results-panel h2, .result-line output { color: #111 !important; }
  .detail-section { padding: 1.5rem 0; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { scroll-behavior: auto !important; transition-duration: .01ms !important; animation-duration: .01ms !important; }
}