:root {
  color-scheme: light;
  --ink: #14231d;
  --muted: #5d6a64;
  --canvas: #f5f3ec;
  --surface: #fffefa;
  --surface-strong: #ffffff;
  --line: #d9ded8;
  --line-strong: #aebbb4;
  --green: #174f3a;
  --green-dark: #103b2b;
  --green-soft: #dcebe3;
  --lime: #d5f26a;
  --orange: #b34b20;
  --orange-soft: #f7e4d9;
  --error: #9f2d25;
  --shadow: 0 18px 50px rgba(28, 46, 38, 0.09);
  --radius: 14px;
  --radius-small: 8px;
}

* { box-sizing: border-box; }

html { font-size: 16px; scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--canvas);
  color: var(--ink);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

a { color: var(--green); text-underline-offset: 0.18em; }
a:hover { color: var(--orange); }

button, input, select { font: inherit; }
button, summary, input, select, a { -webkit-tap-highlight-color: transparent; }

:focus-visible {
  outline: 3px solid #1f73b7;
  outline-offset: 3px;
}

.shell { width: min(1160px, calc(100% - 40px)); margin-inline: auto; }
.site-main { min-height: calc(100vh - 220px); padding-block: 26px 88px; }

.skip-link {
  position: fixed;
  left: 16px;
  top: -80px;
  z-index: 100;
  padding: 10px 16px;
  background: var(--ink);
  color: white;
  border-radius: 0 0 8px 8px;
}
.skip-link:focus { top: 0; }

.site-header { background: rgba(255, 254, 250, 0.94); border-bottom: 1px solid var(--line); }
.nav-row { min-height: 72px; display: flex; align-items: center; justify-content: space-between; gap: 30px; }
.brand { display: inline-flex; align-items: center; gap: 10px; color: var(--ink); font-size: 1.08rem; font-weight: 800; text-decoration: none; letter-spacing: -0.02em; }
.brand:hover { color: var(--ink); }
.brand-mark { display: grid; place-items: center; width: 32px; height: 32px; background: var(--green); color: var(--lime); border-radius: 7px; font: 800 1.4rem/1 ui-monospace, monospace; transform: rotate(-45deg); }
.brand-mark + span { letter-spacing: -0.035em; }
.desktop-nav { display: flex; align-items: center; gap: 30px; }
.desktop-nav a { color: var(--ink); font-size: 0.9rem; font-weight: 700; text-decoration: none; }
.desktop-nav a:hover { color: var(--orange); }
.mobile-nav { display: none; position: relative; }
.mobile-nav summary { cursor: pointer; font-weight: 700; }
.mobile-nav div { position: absolute; right: 0; top: 38px; z-index: 20; width: 220px; display: grid; gap: 2px; padding: 10px; background: white; border: 1px solid var(--line); border-radius: 10px; box-shadow: var(--shadow); }
.mobile-nav a { padding: 10px; color: var(--ink); text-decoration: none; font-weight: 650; }

.site-footer { padding-block: 38px; background: var(--ink); color: #dfe8e2; }
.footer-grid { display: flex; justify-content: space-between; gap: 30px; }
.footer-grid strong { color: white; font-size: 1.05rem; }
.footer-grid p { margin: 4px 0 0; color: #9fb2a9; font-size: 0.9rem; }
.footer-grid nav { display: flex; gap: 24px; align-items: start; }
.footer-grid a { color: #dfe8e2; font-size: 0.9rem; }

.breadcrumbs { margin-bottom: 26px; font-size: 0.83rem; color: var(--muted); }
.breadcrumbs ol { display: flex; flex-wrap: wrap; gap: 7px; margin: 0; padding: 0; list-style: none; }
.breadcrumbs li:not(:last-child)::after { content: "/"; margin-left: 7px; color: var(--line-strong); }
.breadcrumbs a { color: var(--muted); }

.eyebrow, .content-kicker { display: block; margin-bottom: 10px; color: var(--orange); font-size: 0.76rem; font-weight: 850; letter-spacing: 0.13em; text-transform: uppercase; }

.page-intro h1, .article-page > h1, .empty-state h1 { margin: 0; max-width: 820px; font-family: Georgia, "Times New Roman", serif; font-size: clamp(2.65rem, 6vw, 5.8rem); line-height: 0.98; letter-spacing: -0.045em; font-weight: 700; }
.visually-hidden { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0, 0, 0, 0); white-space: nowrap; border: 0; }
.calculator-search button { padding: 10px 18px; background: var(--green); border: 0; border-radius: 7px; color: white; font-weight: 800; cursor: pointer; }
.calculator-search button:hover { background: var(--green-dark); }
.primary-link, .secondary-link { display: inline-flex; align-items: center; justify-content: center; min-height: 48px; padding: 11px 19px; border: 1px solid var(--green); border-radius: var(--radius-small); font-weight: 800; text-decoration: none; }
.primary-link { background: var(--green); color: white; }
.primary-link:hover { background: var(--green-dark); color: white; }
.secondary-link { color: var(--green); }

.section-heading { display: flex; align-items: end; justify-content: space-between; gap: 30px; margin-bottom: 24px; }
.section-heading h2 { margin: 0; max-width: 720px; font-family: Georgia, serif; font-size: clamp(1.8rem, 4vw, 3.15rem); line-height: 1.08; letter-spacing: -0.035em; }
.section-heading > a { flex: none; font-weight: 750; }
.tool-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px; }
.category-token { display: inline-grid; place-items: center; align-self: start; min-width: 58px; height: 28px; padding: 0 9px; background: var(--orange-soft); border-radius: 999px; color: #9e421b; font: 800 0.68rem/1 ui-monospace, monospace; letter-spacing: 0.06em; text-transform: uppercase; }
.tool-grid--hub { margin-bottom: 48px; }
.tool-card { display: flex; flex-direction: column; min-height: 236px; padding: 24px; background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); color: var(--ink); text-decoration: none; transition: transform 160ms ease, border-color 160ms ease, box-shadow 160ms ease; }
.tool-card:hover { color: var(--ink); transform: translateY(-3px); border-color: var(--line-strong); box-shadow: 0 12px 35px rgba(28, 46, 38, 0.08); }
.tool-card--featured { background: var(--green-soft); border-color: #a8c5b5; }
.tool-number { color: var(--orange); font: 800 0.72rem/1 ui-monospace, monospace; letter-spacing: 0.11em; text-transform: uppercase; }
.tool-card h2, .tool-card h3 { margin: 42px 0 8px; font-family: Georgia, serif; font-size: 1.45rem; line-height: 1.15; letter-spacing: -0.025em; }
.tool-card p { margin: 0 0 22px; color: var(--muted); font-size: 0.94rem; }
.card-link { margin-top: auto; font-weight: 800; font-size: 0.88rem; color: var(--green); }

/* ---- home page ---- */
.home-hero { display: grid; grid-template-columns: 1.05fr 0.95fr; gap: 44px; align-items: center; padding-block: 40px 36px; }
.home-hero h1 { font-size: clamp(2.3rem, 4.4vw, 3.3rem); line-height: 1.03; }
.home-hero__copy > p { max-width: 46ch; margin: 14px 0 0; color: var(--muted); font-size: 1.02rem; }
.home-finder { margin-top: 22px; }
.home-finder label { display: block; margin-bottom: 6px; font-size: 0.8rem; font-weight: 700; color: var(--ink); }
.home-finder__box { display: flex; align-items: center; gap: 8px; max-width: 460px; padding: 5px 5px 5px 14px; background: var(--surface-strong); border: 1px solid var(--line-strong); border-radius: 11px; box-shadow: 0 10px 30px rgba(28, 46, 38, 0.07); }
.home-finder__box:focus-within { outline: 3px solid #1f73b7; outline-offset: 2px; }
.home-finder__box svg { flex: none; color: var(--muted); }
.home-finder__box input { flex: 1; min-width: 0; min-height: 48px; padding: 10px 0; background: transparent; border: 0; color: var(--ink); }
.home-finder__box input:focus { outline: 0; }
.home-finder__box button { padding: 10px 18px; background: var(--green); border: 0; border-radius: 7px; color: white; font-weight: 800; cursor: pointer; }
.home-finder__box button:hover { background: var(--green-dark); }
.home-finder__hint { margin: 9px 0 0; color: var(--muted); font-size: 0.83rem; }

.minicalc { background: var(--surface-strong); border: 1px solid var(--line); border-radius: var(--radius); box-shadow: var(--shadow); overflow: hidden; }
.minicalc__head { padding: 14px 20px; background: var(--green); color: white; }
.minicalc__head strong { display: block; font-size: 1rem; }
.minicalc__head span { color: #bcd4c8; font-size: 0.82rem; }
.minicalc__body { padding: 18px 20px 20px; }
.minicalc__row { display: grid; grid-template-columns: repeat(3, 1fr); gap: 10px; }
.minicalc__field label { display: block; margin-bottom: 5px; font-size: 0.76rem; font-weight: 800; color: var(--ink); }
.minicalc__field input { width: 100%; min-height: 44px; padding: 8px 11px; background: white; border: 1px solid var(--line-strong); border-radius: var(--radius-small); color: var(--ink); font-variant-numeric: tabular-nums; }
.minicalc__field input:hover { border-color: var(--green); }
.minicalc__out { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1px; margin-top: 14px; background: var(--line); border: 1px solid var(--line); border-radius: var(--radius-small); overflow: hidden; }
.minicalc__out div { padding: 12px 12px 11px; background: var(--ink); }
.minicalc__out span { display: block; margin-bottom: 3px; color: #a9bdb2; font-size: 0.72rem; }
.minicalc__out strong { font: 700 1.4rem/1 Georgia, serif; color: var(--lime); letter-spacing: -0.02em; font-variant-numeric: tabular-nums; }
.minicalc__out strong small { margin-left: 3px; color: #9fb3a8; font: 600 0.62rem/1 Inter, sans-serif; }
.minicalc__go { width: 100%; min-height: 48px; margin-top: 16px; background: var(--orange); border: 0; border-radius: var(--radius-small); color: white; font-weight: 850; cursor: pointer; }
.minicalc__go:hover { background: #b95022; }
.minicalc__note { margin: 12px 0 0; color: var(--muted); font-size: 0.79rem; }
.minicalc__note a { font-weight: 700; }

.block { padding-block: 30px 34px; border-top: 1px solid var(--line); }
.block-head { display: flex; align-items: baseline; justify-content: space-between; gap: 20px; margin-bottom: 16px; }
.block-head h2 { margin: 0; font-family: Georgia, serif; font-size: clamp(1.4rem, 2.6vw, 1.9rem); letter-spacing: -0.03em; }
.block-head a { flex: none; font-weight: 750; font-size: 0.87rem; }

.home-tools { display: grid; grid-template-columns: repeat(3, 1fr); gap: 2px; background: var(--line); border: 1px solid var(--line); border-radius: var(--radius); overflow: hidden; }
.home-tool { display: flex; align-items: center; justify-content: space-between; gap: 10px; padding: 12px 15px; background: var(--surface); color: var(--ink); text-decoration: none; }
.home-tool:hover { background: var(--green-soft); }
.home-tool b { font-weight: 650; font-size: 0.92rem; }
.home-tool i { flex: none; margin-left: 10px; color: var(--muted); font: 650 0.66rem/1 ui-monospace, monospace; letter-spacing: 0.05em; text-transform: uppercase; font-style: normal; }

.home-cats { display: grid; grid-template-columns: repeat(4, 1fr); gap: 10px; }
.home-cat { display: flex; flex-direction: column; gap: 6px; padding: 15px 16px 14px; background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius-small); color: var(--ink); text-decoration: none; }
.home-cat:hover { border-color: var(--line-strong); box-shadow: 0 8px 22px rgba(28, 46, 38, 0.06); }
.home-cat b { font-family: Georgia, serif; font-size: 1rem; line-height: 1.2; }
.home-cat span { color: var(--muted); font-size: 0.78rem; font-weight: 650; }
.home-cat--accent { background: var(--green); border-color: var(--green); }
.home-cat--accent b { color: white; }
.home-cat--accent span { color: var(--lime); }

.home-trust { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
.home-trust b { display: block; font-size: 0.95rem; }
.home-trust span { display: block; margin-top: 4px; color: var(--muted); font-size: 0.87rem; }

.page-intro { max-width: 860px; padding: 18px 0 34px; }
.page-intro--hub { padding-bottom: 42px; }
.page-intro h1 { font-size: clamp(2.45rem, 6vw, 5rem); }
.page-intro > p, .lede { max-width: 790px; margin: 22px 0 0; color: var(--muted); font-size: clamp(1.05rem, 2vw, 1.28rem); }

.calculator-card { overflow: hidden; margin-bottom: 20px; background: var(--surface-strong); border: 1px solid var(--line); border-radius: var(--radius); box-shadow: var(--shadow); }
.calculator-heading { padding: 22px 26px; background: var(--green); color: white; }
.calculator-heading h2 { margin: 0; font-size: 1.25rem; }
.calculator-heading p { margin: 3px 0 0; color: #c8dacf; font-size: 0.9rem; }
.calculator-form { padding: 26px; }
.form-section { margin: 0; padding: 0; border: 0; }
.form-section + .form-section { margin-top: 25px; padding-top: 23px; border-top: 1px solid var(--line); }
.form-section legend { margin: 0 0 14px; padding: 0; font-weight: 850; }
.unit-choice { display: flex; flex-wrap: wrap; gap: 10px; margin-bottom: 18px; }
.unit-choice label { display: flex; align-items: center; gap: 8px; min-height: 42px; padding: 8px 14px; background: #f4f7f4; border: 1px solid var(--line); border-radius: 999px; cursor: pointer; font-weight: 750; }
.unit-choice small { color: var(--muted); font-weight: 550; }
.unit-choice input { width: 17px; height: 17px; accent-color: var(--green); }
.field-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; }
.field-grid--three { grid-template-columns: repeat(3, 1fr); }
.field-grid--one { grid-template-columns: minmax(220px, 360px); }
.field { min-width: 0; }
.field > label { display: block; margin-bottom: 7px; font-size: 0.87rem; font-weight: 800; }
.field label small { color: var(--muted); font-weight: 550; }
.field input, .field select { width: 100%; min-height: 48px; padding: 10px 12px; background: white; border: 1px solid var(--line-strong); border-radius: var(--radius-small); color: var(--ink); }
.field textarea { width: 100%; padding: 10px 12px; resize: vertical; background: white; border: 1px solid var(--line-strong); border-radius: var(--radius-small); color: var(--ink); }
.field input:hover, .field select:hover { border-color: var(--green); }
.load-grid { display: grid; grid-template-columns: minmax(170px, 1.4fr) repeat(3, minmax(110px, 1fr)); gap: 10px 14px; align-items: center; }
.load-grid > strong { color: var(--muted); font-size: 0.78rem; text-transform: uppercase; letter-spacing: 0.06em; }
.load-grid > input { width: 100%; min-height: 44px; padding: 9px 11px; background: white; border: 1px solid var(--line-strong); border-radius: var(--radius-small); }
.load-fixed { color: var(--muted); font-size: 0.86rem; font-weight: 750; }
.input-unit { display: grid; grid-template-columns: minmax(0, 1fr) auto; align-items: center; overflow: hidden; background: white; border: 1px solid var(--line-strong); border-radius: var(--radius-small); }
.input-unit--prefix { grid-template-columns: auto minmax(0, 1fr); }
.input-unit input { border: 0; border-radius: 0; }
.input-unit span { padding: 0 13px; color: var(--muted); font-weight: 750; }
.input-unit:focus-within { outline: 3px solid #1f73b7; outline-offset: 3px; }
.input-unit input:focus-visible { outline: 0; }
.form-note { margin: 13px 0 0; color: var(--muted); font-size: 0.83rem; }
.calculate-button { min-height: 52px; margin-top: 25px; padding: 12px 24px; background: var(--orange); border: 0; border-radius: var(--radius-small); color: white; font-weight: 850; cursor: pointer; }
.calculate-button:hover { background: #9e431c; }
.field-error { display: block; margin-top: 5px; color: var(--error); font-size: 0.8rem; font-weight: 700; }
.validation-summary { margin-bottom: 16px; color: var(--error); font-weight: 700; }
.validation-summary:empty, .validation-summary-valid { display: none; }
.validation-summary ul { margin: 0; }

.results { scroll-margin-top: 20px; margin: 20px 0; padding: 28px; background: var(--ink); color: white; border-radius: var(--radius); box-shadow: var(--shadow); }
.results a, .results .eyebrow { color: var(--lime); }
.results-heading { display: flex; align-items: start; justify-content: space-between; gap: 30px; margin-bottom: 24px; }
.results-heading h2 { margin: 0; font-family: Georgia, serif; font-size: clamp(2rem, 5vw, 3.5rem); line-height: 1; color: var(--lime); letter-spacing: -0.04em; }
.waste-badge { flex: none; padding: 7px 11px; background: rgba(255,255,255,0.08); border: 1px solid rgba(255,255,255,0.16); border-radius: 999px; color: #dfe8e2; font-size: 0.78rem; font-weight: 750; }
.result-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 10px; }
.result-card { padding: 19px; background: rgba(255,255,255,0.07); border: 1px solid rgba(255,255,255,0.12); border-radius: 10px; }
.result-card--primary { background: rgba(213,242,106,0.11); border-color: rgba(213,242,106,0.36); }
.result-card span, .result-card small { display: block; color: #b8cbc0; font-size: 0.78rem; }
.result-card strong { display: block; margin: 6px 0; font-size: 1.75rem; line-height: 1; }
.breakdown-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 30px; margin-top: 26px; }
.breakdown-grid h3, .cost-strip h3 { margin: 0 0 8px; font-size: 0.95rem; }
.breakdown-list { margin: 0; }
.breakdown-list div { display: flex; justify-content: space-between; gap: 20px; padding: 8px 0; border-bottom: 1px solid rgba(255,255,255,0.11); }
.breakdown-list dt { color: #b8cbc0; }
.breakdown-list dd { margin: 0; font-weight: 800; }
.cost-strip { display: flex; align-items: center; flex-wrap: wrap; gap: 10px 28px; margin-top: 24px; padding: 18px; background: var(--orange-soft); border-radius: 10px; color: var(--ink); }
.cost-strip h3 { flex-basis: 100%; }
.cost-strip p { margin: 0; }
.share-note { margin: 18px 0 0; color: #9fb2a9; font-size: 0.79rem; }

.ad-slot { display: grid; place-items: center; min-height: 118px; margin: 32px 0; border: 1px dashed var(--line-strong); border-radius: var(--radius-small); background: rgba(255,255,255,0.35); color: #89948e; }
.ad-slot span { font-size: 0.68rem; font-weight: 800; letter-spacing: 0.13em; text-transform: uppercase; }

.content-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; margin-block: 28px; }
.content-card { padding: 27px; background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); }
.prose h2 { margin: 0 0 13px; font-family: Georgia, serif; font-size: clamp(1.45rem, 3vw, 2rem); line-height: 1.15; letter-spacing: -0.025em; }
.prose h3 { margin: 28px 0 8px; }
.prose p { margin: 0 0 14px; }
.prose p:last-child { margin-bottom: 0; }
.prose li + li { margin-top: 7px; }
.prose ul, .prose ol { padding-left: 1.3rem; }
.formula-block { overflow-x: auto; margin: 15px 0; padding: 15px 17px; background: #edf2ee; border-left: 4px solid var(--green); border-radius: 4px 8px 8px 4px; }
.formula-block code { color: var(--ink); font: 700 0.9rem/1.5 ui-monospace, SFMono-Regular, Menlo, Consolas, monospace; }
.worked-example { display: grid; grid-template-columns: 0.7fr 1.3fr; gap: 40px; margin: 28px 0; padding: 30px; background: var(--green-soft); border: 1px solid #b8d0c2; border-radius: var(--radius); }
.example-steps p { display: grid; grid-template-columns: 155px 1fr; gap: 18px; margin: 0; padding: 10px 0; border-bottom: 1px solid #b8d0c2; }
.example-steps p:last-child { border-bottom: 0; }
.example-steps span { color: var(--muted); }
.notice { margin-top: 18px; padding: 16px; background: var(--orange-soft); border-left: 4px solid var(--orange); border-radius: 4px 8px 8px 4px; }
.notice p { margin-top: 4px; }
.notice + .calculator-card, .notice + .content-card { margin-top: 20px; }
.appliance-row { margin: 18px 0; padding: 18px; border: 1px solid var(--line); border-radius: var(--radius-small); min-width: 0; }
.table-scroll { overflow-x: auto; margin: 16px 0; }
.energy-table { width: 100%; border-collapse: collapse; font-size: 0.9rem; }
.energy-table caption { text-align: left; margin-bottom: 10px; }
.energy-table th, .energy-table td { text-align: left; padding: 10px; border-bottom: 1px solid var(--line); }
.energy-table th[scope="row"] { overflow-wrap: anywhere; min-width: 100px; }
.reference-table { width: 100%; border-collapse: collapse; font-size: 0.9rem; }
.reference-table caption { margin-bottom: 10px; text-align: left; color: var(--muted); }
.reference-table th, .reference-table td { padding: 10px 12px; border-bottom: 1px solid var(--line); text-align: left; vertical-align: top; }
.reference-table thead th { background: #edf2ee; color: var(--ink); }
.reference-table tbody th { color: var(--ink); }
.reference-note { color: var(--muted); font-size: 0.84rem; }
.calculator-supplement { margin-block: 28px; }
.feedback-form { margin-top: 20px; }
.feedback-form .field + .field { margin-top: 16px; }
.feedback-trap { position: absolute; left: -10000px; width: 1px; height: 1px; overflow: hidden; }
.calculator-diagram { margin: 20px 0; padding: 22px; background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); }
.calculator-diagram svg { display: block; width: 100%; height: auto; max-height: 360px; }
.calculator-diagram figcaption { margin-top: 12px; color: var(--muted); font-size: 0.86rem; }
.roof-plan { display: block; width: 100%; max-height: 400px; border: 1px solid var(--line); margin: 20px 0 10px; }
@media print {
  .site-header, .site-footer, .skip-link, .print-help { display: none; }
  .energy-worksheet > :not(.results):not(.page-intro):not(.notice) { display: none; }
  .energy-worksheet .results, .energy-worksheet .notice { background: white; color: black; box-shadow: none; border: 1px solid #777; }
  .energy-worksheet .results, .energy-worksheet .results * { color: black !important; background: transparent !important; outline: none !important; }
  .energy-worksheet .results p:has(a) { display: none; }
  .energy-worksheet .results { margin-top: 12px; padding: 14px; }
  .energy-worksheet .results h2 { font-size: 22pt; }
  .energy-worksheet .page-intro { padding: 0; }
  .energy-worksheet .page-intro p { font-size: 10pt; margin-bottom: 10px; }
  .energy-worksheet .notice { font-size: 9pt; padding: 10px; margin-top: 10px; }
  .energy-worksheet .table-scroll { overflow: visible; }
  .energy-worksheet .energy-table { font-size: 9pt; }
  .energy-worksheet .energy-table th, .energy-worksheet .energy-table td { padding: 5px; }
  .energy-worksheet tr { break-inside: avoid; }
  .energy-worksheet h1 { font-size: 24pt; }
}

.faq-section { margin-block: 46px; }
.faq-section > h2 { margin-bottom: 18px; }
.faq-section details { padding: 17px 0; border-top: 1px solid var(--line); }
.faq-section details:last-child { border-bottom: 1px solid var(--line); }
.faq-section summary { cursor: pointer; font-weight: 800; }
.faq-section details p { max-width: 820px; margin: 12px 0 0; color: var(--muted); }
.related-section { margin-top: 50px; }
.related-links { display: grid; grid-template-columns: repeat(3, 1fr); gap: 12px; }
.related-links a { display: flex; flex-direction: column; gap: 4px; padding: 19px; background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius-small); color: var(--ink); text-decoration: none; }
.related-links a:hover { border-color: var(--green); }
.related-links span { color: var(--green); font-size: 0.85rem; }

.directory-intro { padding-bottom: 25px; }
.calculator-search { max-width: 760px; margin-bottom: 48px; }
.calculator-search > label { display: block; margin-bottom: 8px; font-weight: 800; }
.calculator-search > div { display: grid; grid-template-columns: minmax(0, 1fr) auto; gap: 7px; padding: 5px; background: white; border: 1px solid var(--line-strong); border-radius: 11px; }
.calculator-search > div:focus-within { outline: 3px solid #1f73b7; outline-offset: 3px; }
.calculator-search input { min-width: 0; min-height: 50px; padding: 10px 13px; border: 0; background: transparent; }
.calculator-search input:focus { outline: 0; }
.directory-results { margin-bottom: 46px; }
.directory-results .section-heading h2 { font-size: 2rem; }
.directory-list { display: grid; grid-template-columns: repeat(2, 1fr); gap: 10px; }
.directory-list a { display: flex; flex-direction: column; gap: 3px; padding: 18px; background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius-small); color: var(--ink); text-decoration: none; }
.directory-list a:hover { border-color: var(--green); }
.directory-list span { color: var(--muted); font-size: 0.86rem; }
.category-directory { display: grid; gap: 14px; }
.directory-category { padding: 27px; background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); }
.directory-category__heading { display: flex; align-items: center; justify-content: space-between; gap: 20px; }
.directory-category__heading > div { display: flex; align-items: center; gap: 13px; }
.directory-category h2 { margin: 0; font-family: Georgia, serif; font-size: 1.65rem; }
.directory-category > p { max-width: 760px; margin: 13px 0 18px; color: var(--muted); }
.directory-links { display: flex; flex-wrap: wrap; gap: 8px; }
.directory-links a { padding: 8px 11px; background: #edf2ee; border-radius: 7px; color: var(--ink); font-size: 0.85rem; font-weight: 750; text-decoration: none; }
.directory-links a span { color: var(--green); }
.category-guidance { margin-top: 10px; }

.article-page { max-width: 820px; margin: 12px auto 0; }
.article-page > h1 { font-size: clamp(2.6rem, 6vw, 4.8rem); }
.article-page > h2 { margin-top: 42px; }
.article-page .formula-block { margin-block: 13px; }
.empty-state { max-width: 720px; padding-block: 100px; }
.empty-state p { margin: 22px 0 30px; color: var(--muted); font-size: 1.12rem; }

@media (max-width: 900px) {
  .home-hero { grid-template-columns: 1fr; padding-top: 32px; }
  .home-cats { grid-template-columns: repeat(3, 1fr); }
  .tool-grid { grid-template-columns: repeat(2, 1fr); }
  .desktop-nav { gap: 18px; }
  .field-grid, .field-grid--four { grid-template-columns: repeat(2, 1fr); }
  .worked-example { grid-template-columns: 1fr; gap: 15px; }
}

@media (max-width: 680px) {
  .shell { width: min(100% - 26px, 1160px); }
  .site-main { padding-top: 18px; padding-bottom: 60px; }
  .desktop-nav { display: none; }
  .mobile-nav { display: block; }
  .home-hero { padding-block: 26px 34px; gap: 26px; }
  .page-intro h1, .article-page > h1, .empty-state h1 { font-size: clamp(2.3rem, 13vw, 3.7rem); }
  .primary-link, .secondary-link { width: 100%; }
  .section-heading, .block-head { align-items: start; flex-direction: column; gap: 12px; }
  .tool-grid, .home-tools, .home-cats, .home-trust, .content-grid, .related-links, .result-grid, .breakdown-grid, .directory-list { grid-template-columns: 1fr; }
  .minicalc__row, .minicalc__out { grid-template-columns: 1fr 1fr; }
  .minicalc__out > div:last-child { grid-column: 1 / -1; }
  .home-finder__box { flex-wrap: wrap; padding: 10px 14px; }
  .home-finder__box input { min-width: 160px; }
  .home-finder__box button { width: 100%; margin-top: 4px; }
  .calculator-search > div { grid-template-columns: 1fr; }
  .calculator-search button { min-height: 48px; }
  .directory-category__heading { align-items: flex-start; flex-direction: column; }
  .tool-card { min-height: 205px; }
  .calculator-heading { padding: 18px; }
  .calculator-form, .results, .content-card, .worked-example { padding: 20px; }
  .field-grid, .field-grid--three, .field-grid--four, .field-grid--one { grid-template-columns: 1fr; }
  .load-grid { grid-template-columns: minmax(105px, 1.25fr) repeat(3, minmax(58px, 1fr)); gap: 6px; font-size: 0.72rem; overflow-x: auto; }
  .load-grid > input { min-height: 40px; padding: 6px; }
  .load-grid .input-unit input { min-width: 0; padding: 6px; }
  .load-grid .input-unit span { padding: 0 6px; }
  .unit-choice { display: grid; }
  .results-heading { flex-direction: column; gap: 13px; }
  .waste-badge { align-self: start; }
  .example-steps p { grid-template-columns: 1fr; gap: 2px; }
  .ad-slot { min-height: 90px; }
  .footer-grid, .footer-grid nav { flex-direction: column; }
  .footer-grid nav { gap: 10px; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .tool-card { transition: none; }
}

/* Saved plans reuse the site's cards, type, and green action color. */
.article-page .eyebrow { color: #a84e24; }
.plans-page > .content-card { margin-top: 24px; }
.save-plan { margin-top: 32px; }
.save-plan .calculator-form { padding: 0; }
.save-plan .calculator-form > button[type="submit"] { margin-top: 20px; }
.save-plan button, .article-page form button, .plan-actions button {
  min-height: 44px; padding: 10px 16px; border: 1px solid var(--green);
  border-radius: var(--radius-small); background: var(--green); color: white; cursor: pointer;
}
.plan-actions .secondary, .plan-rename .secondary, .account-delete .secondary { background: var(--surface); color: var(--green); }
.save-plan button:disabled, .plan-card button:disabled { opacity: .65; cursor: wait; }
.plan-card { border-top: 1px solid var(--line); padding-block: 20px; overflow-wrap: anywhere; }
.plan-card h3 { margin-top: 0; }
.plan-card ul, .plan-compare-grid ul { padding-left: 20px; }
.plan-snapshot { white-space: pre-line; font-size: .92rem; }
.plan-actions { display: flex; gap: 12px; flex-wrap: wrap; align-items: center; }
.plan-actions label, .account-delete label { display: flex; gap: 10px; align-items: center; min-height: 44px; }
.plan-actions input[type=checkbox], .account-delete input[type=checkbox] { width: 20px; height: 20px; flex-shrink: 0; }
.plan-rename { margin-top: 16px; display: flex; gap: 12px; align-items: end; flex-wrap: wrap; }
.plan-rename label { display: grid; gap: 6px; flex: 1; min-width: 160px; }
.plan-rename input { width: 100%; min-height: 44px; border: 1px solid var(--line-strong); border-radius: 7px; padding: 8px; }
.account-delete { margin-block: 24px; }
.plan-compare-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 24px; overflow-wrap: anywhere; }
#plans-status:not(:empty) { padding: 16px; border-left: 4px solid var(--green); background: var(--green-soft); }
@media (max-width: 1000px) { .desktop-nav { display: none; } .mobile-nav { display: block; } }
@media (max-width: 680px) { .plan-compare-grid { grid-template-columns: 1fr; } }
@media print { .save-plan, .plan-actions, .plan-rename, .account-delete { display: none; } }