:root {
  --ink: #29342f;
  --ink-soft: #53615a;
  --paper: #f3eee4;
  --panel: #fbf8f1;
  --panel-deep: #e8e1d4;
  --line: #d2c7b6;
  --moss: #40594b;
  --moss-dark: #304539;
  --ochre: #c99742;
  --ochre-soft: #f2e1b8;
  --rust: #a9523d;
  --rust-soft: #f0d8d1;
  --shadow: 0 12px 30px rgba(54, 48, 36, .08);
  --radius: 14px;
  --sans: "Trebuchet MS", "Segoe UI", sans-serif;
  --display: Georgia, "Times New Roman", serif;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  min-width: 320px;
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.5;
}
body::before {
  position: fixed;
  inset: 0;
  z-index: -1;
  pointer-events: none;
  content: "";
  opacity: .16;
  background-image: radial-gradient(rgba(54, 48, 36, .12) .7px, transparent .7px);
  background-size: 7px 7px;
}
a { color: inherit; }
button, input, select { font: inherit; }
button, a, select, input { -webkit-tap-highlight-color: transparent; }
:focus-visible { outline: 3px solid var(--ochre); outline-offset: 3px; }

.site-header {
  border-bottom: 1px solid rgba(210, 199, 182, .72);
  background: rgba(243, 238, 228, .88);
}
.header-inner, .footer-inner {
  width: min(1120px, calc(100% - 36px));
  margin: 0 auto;
}
.header-inner {
  display: flex;
  min-height: 76px;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
}
.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: var(--moss-dark);
  text-decoration: none;
}
.brand-mark {
  display: grid;
  width: 38px;
  height: 38px;
  place-items: center;
  border: 1px solid var(--moss);
  border-radius: 11px;
  color: var(--moss);
}
.brand-mark svg { width: 27px; height: 27px; }
.brand strong, .brand small { display: block; }
.brand strong {
  font-size: 14px;
  letter-spacing: .04em;
  text-transform: uppercase;
}
.brand small { margin-top: 1px; color: var(--ink-soft); font-size: 11px; }
.header-note { color: var(--ink-soft); font-size: 12px; letter-spacing: .06em; text-transform: uppercase; }
.back-link {
  color: var(--moss-dark);
  font-size: 14px;
  font-weight: 700;
  text-decoration: none;
}
.back-link span { margin-right: 5px; font-size: 18px; }

.home-main, .calculator-shell { width: min(1120px, calc(100% - 36px)); margin: 0 auto; }
.home-main { padding: 76px 0 92px; }
.home-intro { max-width: 690px; }
.eyebrow {
  margin: 0 0 12px;
  color: var(--moss);
  font-size: 11px;
  font-weight: 800;
  letter-spacing: .16em;
  text-transform: uppercase;
}
h1, h2 { font-family: var(--display); font-weight: 500; }
h1 { margin: 0; color: var(--moss-dark); font-size: clamp(42px, 7vw, 82px); line-height: .98; letter-spacing: -.045em; }
h2 { margin: 0; color: var(--moss-dark); font-size: clamp(27px, 4vw, 38px); line-height: 1.06; letter-spacing: -.03em; }
.intro-copy { max-width: 500px; margin: 26px 0 0; color: var(--ink-soft); font-size: 19px; }
.tool-list { margin-top: 94px; }
.section-heading { margin-bottom: 23px; }
.tool-card {
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: 20px;
  padding: 24px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--panel);
  box-shadow: var(--shadow);
  text-decoration: none;
  transition: transform .2s ease, border-color .2s ease, box-shadow .2s ease;
}
.tool-card:hover { border-color: var(--moss); box-shadow: 0 15px 33px rgba(54, 48, 36, .12); transform: translateY(-2px); }
.tool-card:active { transform: translateY(0); }
.tool-card-icon {
  display: grid;
  width: 60px;
  height: 60px;
  place-items: center;
  border-radius: 12px;
  background: var(--moss);
  color: var(--paper);
}
.tool-card-icon svg { width: 34px; height: 34px; }
.tool-kicker { display: block; margin-bottom: 4px; color: var(--rust); font-size: 11px; font-weight: 800; letter-spacing: .13em; text-transform: uppercase; }
.tool-card-copy strong, .tool-card-copy > span:last-child { display: block; }
.tool-card-copy strong { color: var(--moss-dark); font-family: var(--display); font-size: 25px; font-weight: 500; }
.tool-card-copy > span:last-child { margin-top: 4px; color: var(--ink-soft); font-size: 14px; }
.arrow { color: var(--rust); font-size: 28px; transition: transform .2s ease; }
.tool-card:hover .arrow { transform: translateX(4px); }
.home-note { display: flex; align-items: center; gap: 14px; max-width: 500px; margin-top: 68px; color: var(--ink-soft); font-family: var(--display); font-size: 18px; font-style: italic; }
.home-note p { margin: 0; }
.note-rule { width: 42px; height: 2px; flex: 0 0 auto; background: var(--ochre); }

.calculator-shell { padding: 54px 0 82px; }
.calculator-heading { max-width: 730px; margin-bottom: 46px; }
.calculator-heading h1 { font-size: clamp(39px, 6vw, 68px); }
.lede { max-width: 650px; margin: 23px 0 0; color: var(--ink-soft); font-size: 17px; }
.calculator-grid { display: grid; grid-template-columns: minmax(0, .93fr) minmax(0, 1.07fr); gap: 22px; align-items: start; }
.input-panel, .result-panel {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--panel);
  box-shadow: var(--shadow);
}
.input-panel { padding: 28px; }
.result-panel { position: sticky; top: 18px; overflow: hidden; }
.panel-heading, .result-topline, .label-row { display: flex; align-items: center; justify-content: space-between; gap: 16px; }
.panel-heading { padding-bottom: 24px; border-bottom: 1px solid var(--line); }
.panel-heading .eyebrow { margin-bottom: 7px; }
.panel-heading h2 { font-size: 30px; }
.field-count { padding: 5px 9px; border-radius: 20px; background: var(--panel-deep); color: var(--ink-soft); font-size: 11px; font-weight: 700; text-transform: uppercase; letter-spacing: .08em; }
.field-group { margin-top: 24px; }
label, legend { display: block; color: var(--moss-dark); font-size: 13px; font-weight: 800; letter-spacing: .02em; }
label span, legend span { color: var(--ink-soft); font-weight: 500; }
select, input[type="number"] {
  width: 100%;
  min-height: 49px;
  margin-top: 8px;
  padding: 11px 13px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fffdf8;
  color: var(--ink);
}
select {
  appearance: none;
  padding-right: 40px;
  background-image: linear-gradient(45deg, transparent 50%, var(--moss) 50%), linear-gradient(135deg, var(--moss) 50%, transparent 50%);
  background-position: calc(100% - 17px) 21px, calc(100% - 12px) 21px;
  background-size: 5px 5px, 5px 5px;
  background-repeat: no-repeat;
}
select:hover, input[type="number"]:hover { border-color: var(--moss); }
.custom-dimensions { padding: 0; }
.custom-dimensions[hidden] { display: none; }
.dimension-fields { display: grid; grid-template-columns: 1fr auto 1fr; align-items: end; gap: 10px; }
.dimension-symbol { padding-bottom: 13px; color: var(--ink-soft); font-family: var(--display); font-size: 25px; }
fieldset { min-width: 0; padding: 0; border: 0; }
.surface-group { margin-top: 28px; }
.radio-stack { display: grid; gap: 9px; margin-top: 10px; }
.radio-option { display: flex; min-height: 61px; align-items: center; gap: 11px; padding: 10px 12px; border: 1px solid var(--line); border-radius: 8px; background: #fffdf8; cursor: pointer; }
.radio-option:has(input:checked) { border-color: var(--moss); background: #f1f4ed; }
.radio-option input { position: absolute; width: 1px; height: 1px; opacity: 0; }
.radio-mark { width: 18px; height: 18px; flex: 0 0 18px; border: 2px solid #9b988d; border-radius: 50%; }
.radio-option input:checked + .radio-mark { border: 5px solid var(--moss); }
.radio-option strong, .radio-option small { display: block; }
.radio-option strong { color: var(--ink); font-size: 13px; }
.radio-option small { margin-top: 2px; color: var(--ink-soft); font-size: 12px; font-weight: 500; }
.slider-group { margin-top: 30px; }
.label-row label { margin: 0; }
output { color: var(--moss-dark); font-family: var(--display); font-size: 23px; }
input[type="range"] { width: 100%; height: 40px; margin: 7px 0 0; accent-color: var(--moss); cursor: pointer; }
.range-ends { display: flex; justify-content: space-between; margin-top: -4px; color: var(--ink-soft); font-size: 11px; }
.field-help { margin: 7px 0 0; color: var(--ink-soft); font-size: 12px; line-height: 1.4; }
.waste-group { position: relative; padding-bottom: 1px; }
.input-suffix { position: absolute; right: 14px; bottom: 39px; color: var(--ink-soft); font-size: 14px; font-weight: 800; }
.waste-group input { padding-right: 35px; }

.result-panel { background: var(--moss-dark); color: var(--paper); }
.result-topline { padding: 27px 28px 0; }
.result-topline .eyebrow { color: var(--ochre-soft); margin: 0; }
.status-dot { display: inline-flex; align-items: center; gap: 6px; color: #d2dfd2; font-size: 11px; font-weight: 700; text-transform: uppercase; letter-spacing: .07em; }
.status-dot span { width: 7px; height: 7px; border-radius: 50%; background: #b7d39e; }
.result-area { padding: 18px 28px 28px; }
.result-area h2 { color: var(--paper); font-size: 32px; }
.hero-result { padding: 29px 0 27px; border-bottom: 1px solid rgba(243, 238, 228, .22); }
.result-label, .result-unit { display: block; color: #c4d0c4; font-size: 13px; }
.hero-result strong { display: block; margin: 2px 0 2px; color: var(--ochre-soft); font-family: var(--display); font-size: clamp(66px, 10vw, 104px); font-weight: 500; line-height: .94; letter-spacing: -.07em; }
.result-unit { font-size: 14px; }
.result-details { margin: 0; }
.result-details > div { display: flex; align-items: baseline; justify-content: space-between; gap: 18px; padding: 15px 0; border-bottom: 1px solid rgba(243, 238, 228, .16); }
.result-details dt { color: #c4d0c4; font-size: 13px; }
.result-details dd { margin: 0; color: var(--paper); font-size: 14px; text-align: right; }
.result-details dd strong { color: var(--paper); font-family: var(--display); font-size: 20px; font-weight: 500; }
.waste-note { display: inline-block; margin: 21px 0 0; padding: 6px 10px; border-radius: 4px; background: rgba(243, 238, 228, .12); color: var(--ochre-soft); font-size: 12px; font-weight: 700; }
.conversion-note { margin: 17px 0 0; color: #bdc9be; font-size: 11px; line-height: 1.5; }
.print-button {
  display: inline-flex;
  min-height: 51px;
  align-items: center;
  gap: 9px;
  margin: 0 28px 28px;
  padding: 12px 17px;
  border: 1px solid rgba(243, 238, 228, .4);
  border-radius: 8px;
  background: transparent;
  color: var(--paper);
  font-size: 13px;
  font-weight: 800;
  cursor: pointer;
  transition: background .2s ease, color .2s ease;
}
.print-button:hover { background: var(--paper); color: var(--moss-dark); }
.print-button span { font-size: 20px; transform: rotate(-45deg); }
.print-summary { display: none; }

.advisory-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 22px; margin-top: 22px; }
.warning-stack { display: grid; gap: 12px; }
.warning { display: flex; gap: 13px; padding: 17px 18px; border: 1px solid; border-radius: var(--radius); }
.warning[hidden] { display: none; }
.warning-icon { display: grid; width: 23px; height: 23px; flex: 0 0 23px; place-items: center; border-radius: 50%; font-weight: 900; }
.warning p { margin: 0; font-size: 13px; line-height: 1.45; }
.warning-amber { border-color: #d4b469; background: var(--ochre-soft); color: #5d4822; }
.warning-amber .warning-icon { background: var(--ochre); color: #fff8e9; }
.warning-red { border-color: #cb9284; background: var(--rust-soft); color: #653329; }
.warning-red .warning-icon { background: var(--rust); color: #fff4ef; }
.base-details { align-self: start; border: 1px solid var(--line); border-radius: var(--radius); background: var(--panel); }
.base-details summary { display: flex; min-height: 65px; align-items: center; justify-content: space-between; gap: 12px; padding: 17px 19px; color: var(--moss-dark); font-family: var(--display); font-size: 21px; cursor: pointer; list-style: none; }
.base-details summary::-webkit-details-marker { display: none; }
.summary-plus { color: var(--rust); font-family: var(--sans); font-size: 27px; font-weight: 300; transition: transform .2s ease; }
.base-details[open] .summary-plus { transform: rotate(45deg); }
.details-content { padding: 0 19px 19px; color: var(--ink-soft); font-size: 13px; }
.details-content p { margin: 0; }
.details-content p + p { margin-top: 13px; }
.details-content strong { color: var(--ink); }
.details-content .caution { padding-top: 13px; border-top: 1px solid var(--line); }

.sources { display: grid; grid-template-columns: minmax(210px, .7fr) 1.3fr; gap: 30px; margin-top: 76px; padding-top: 30px; border-top: 1px solid var(--line); }
.sources h2 { font-size: 32px; }
.sources ul { display: grid; grid-template-columns: repeat(3, 1fr); gap: 10px; margin: 0; padding: 0; list-style: none; }
.sources li { padding: 13px; border-left: 2px solid var(--ochre); background: rgba(251, 248, 241, .58); }
.sources a { color: var(--moss-dark); font-size: 13px; font-weight: 800; text-decoration: none; }
.sources a:hover { color: var(--rust); }
.sources a span { color: var(--rust); }
.sources small { display: block; margin-top: 6px; color: var(--ink-soft); font-size: 11px; line-height: 1.35; }
.site-footer { border-top: 1px solid rgba(210, 199, 182, .72); }
.footer-inner { display: flex; min-height: 72px; align-items: center; justify-content: space-between; gap: 20px; color: var(--ink-soft); font-size: 11px; letter-spacing: .04em; }
.footer-inner span:first-child { color: var(--moss-dark); font-weight: 800; text-transform: uppercase; }

@media (max-width: 760px) {
  .header-inner, .footer-inner, .home-main, .calculator-shell { width: min(100% - 28px, 650px); }
  .header-inner { min-height: 68px; }
  .header-note { display: none; }
  .home-main { padding: 57px 0 68px; }
  .tool-list { margin-top: 70px; }
  .tool-card { grid-template-columns: auto 1fr auto; gap: 12px; padding: 17px; }
  .tool-card-icon { width: 48px; height: 48px; }
  .tool-card-icon svg { width: 29px; height: 29px; }
  .tool-card-copy strong { font-size: 20px; }
  .tool-card-copy > span:last-child { font-size: 12px; line-height: 1.35; }
  .calculator-shell { padding: 39px 0 62px; }
  .calculator-heading { margin-bottom: 32px; }
  .calculator-heading h1 { font-size: clamp(37px, 11vw, 55px); }
  .calculator-grid, .advisory-grid, .sources { grid-template-columns: 1fr; }
  .result-panel { position: static; }
  .input-panel { padding: 21px 18px; }
  .result-topline { padding: 22px 19px 0; }
  .result-area { padding: 16px 19px 23px; }
  .print-button { width: calc(100% - 38px); justify-content: center; margin: 0 19px 20px; }
  .hero-result strong { font-size: clamp(70px, 24vw, 108px); }
  .advisory-grid { gap: 12px; }
  .sources { gap: 22px; margin-top: 58px; }
  .sources ul { grid-template-columns: 1fr; }
  .footer-inner { min-height: 65px; flex-wrap: wrap; padding: 15px 0; }
}
@media (max-width: 390px) {
  .brand small { display: none; }
  .brand-mark { width: 34px; height: 34px; }
  .brand strong { font-size: 12px; }
  .back-link { font-size: 12px; }
  .tool-card { padding: 14px 12px; }
  .tool-card-copy strong { font-size: 17px; }
}

@media print {
  @page { margin: 16mm; }
  body { background: #fff; color: #111; }
  body::before, .site-header, .calculator-heading, .input-panel, .result-topline, .result-area, .print-button, .advisory-grid, .sources, .site-footer { display: none !important; }
  .calculator-shell, .calculator-grid, .result-panel { display: block; width: auto; margin: 0; padding: 0; border: 0; box-shadow: none; background: #fff; }
  .print-summary { display: block; color: #111; }
  .print-summary h2 { margin: 6px 0 5px; color: #253a2e; font-size: 25px; }
  .print-summary p { color: #51534d; font-size: 11px; }
  .print-summary .print-kicker { margin: 0; color: #596d5c; font-size: 10px; font-weight: 700; letter-spacing: .12em; text-transform: uppercase; }
  .print-summary dl { margin: 22px 0; border-top: 1px solid #bbb; }
  .print-summary dl div { display: flex; justify-content: space-between; gap: 20px; padding: 9px 0; border-bottom: 1px solid #ddd; font-size: 12px; }
  .print-summary dt { color: #5c615a; }
  .print-summary dd { margin: 0; color: #111; font-weight: 700; text-align: right; }
}
/* ---- FAQ (calculator page) ---- */
.faq { display: grid; grid-template-columns: minmax(210px, .7fr) 1.3fr; gap: 30px; margin-top: 76px; padding-top: 30px; border-top: 1px solid var(--line); }
.faq h2 { margin: 0; font-size: 32px; }
.faq-list { display: grid; gap: 4px; margin: 0; }
.faq-list > div { padding: 17px 19px; border-left: 2px solid var(--moss); background: rgba(251, 248, 241, .58); }
.faq-list dt { color: var(--moss-dark); font-family: var(--display); font-size: 19px; }
.faq-list dd { margin: 7px 0 0; color: var(--ink-soft); font-size: 14px; line-height: 1.55; }

/* ---- Prose pages (about, contact, privacy, terms) ---- */
.prose-shell { width: min(1120px, calc(100% - 36px)); margin: 0 auto; padding: 54px 0 82px; }
.prose-heading { max-width: 730px; margin-bottom: 46px; }
.prose-heading h1 { margin: 0; font-size: clamp(36px, 5vw, 58px); }
.prose { max-width: 720px; }
.prose h2 { margin: 42px 0 13px; color: var(--moss-dark); font-size: 25px; }
.prose h2:first-child { margin-top: 0; }
.prose p { margin: 0 0 15px; font-size: 16px; line-height: 1.68; }
.prose ul { margin: 0 0 15px; padding-left: 0; list-style: none; }
.prose li { position: relative; margin-bottom: 11px; padding-left: 21px; font-size: 16px; line-height: 1.6; }
.prose li::before { position: absolute; left: 0; top: 0; color: var(--ochre); content: "\2014"; }
.prose strong { color: var(--ink); }
.prose a { color: var(--moss-dark); font-weight: 700; text-decoration: underline; text-underline-offset: 3px; text-decoration-color: var(--line); }
.prose a:hover { color: var(--rust); text-decoration-color: var(--rust); }
.prose .updated { margin-bottom: 34px; padding-bottom: 17px; border-bottom: 1px solid var(--line); color: var(--ink-soft); font-size: 11px; letter-spacing: .08em; text-transform: uppercase; }
.prose .contact-email { margin-bottom: 8px; font-family: var(--display); font-size: clamp(23px, 4vw, 33px); }
.prose .contact-email a { color: var(--moss-dark); font-weight: 500; text-decoration-color: var(--ochre); }

/* ---- Footer navigation ---- */
.footer-nav { display: flex; flex-wrap: wrap; gap: 18px; }
.footer-nav a { color: var(--ink-soft); font-size: 11px; letter-spacing: .04em; text-decoration: none; }
.footer-nav a:hover { color: var(--rust); text-decoration: underline; text-underline-offset: 3px; }

@media (max-width: 760px) {
  .faq { grid-template-columns: 1fr; gap: 22px; margin-top: 58px; }
  .prose-shell { width: min(100% - 28px, 650px); padding: 39px 0 62px; }
  .prose-heading { margin-bottom: 32px; }
  .prose-heading h1 { font-size: clamp(33px, 10vw, 48px); }
  .prose h2 { margin-top: 34px; font-size: 22px; }
  .footer-nav { order: 3; width: 100%; gap: 14px; }
}