/* YardWise — one design system, no webfonts, no images above the fold, no motion that cannot be reduced. */
:root {
  color-scheme: light dark;
  --bg: #f6f5f1;
  --surface: #ffffff;
  --surface-2: #efede6;
  --ink: #14231d;
  --ink-soft: #4b5a52;
  --line: #d5d2c6;
  --brand: #1f5c46;
  --brand-ink: #0f3a2c;
  --brand-soft: #e3efe9;
  --accent: #b45309;
  --danger: #9a1b1b;
  --radius: 14px;
  --radius-sm: 10px;
  --shadow: 0 1px 2px rgba(20, 35, 29, 0.06), 0 8px 24px rgba(20, 35, 29, 0.06);
  --font: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --mono: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  --maxw: 1120px;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #101613;
    --surface: #161d19;
    --surface-2: #1d2621;
    --ink: #eef2ee;
    --ink-soft: #b3c0b8;
    --line: #2e3a33;
    --brand: #7fd0ae;
    --brand-ink: #c9f0de;
    --brand-soft: #1b2b24;
    --accent: #f0b46a;
    --danger: #ff9b9b;
    --shadow: 0 1px 2px rgba(0, 0, 0, 0.4), 0 8px 24px rgba(0, 0, 0, 0.3);
  }
}

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

html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--font);
  font-size: 1rem;
  line-height: 1.55;
  /* A belt, not the fix: layout below is sized so nothing overflows a 390 px viewport. Evidence
     is qa/overflow-390-768.json, measured in a real 390 px Playwright viewport (every page
     scrollWidth 375, zero uncontained elements). Keep this so a future stray child cannot make
     the phone page scroll sideways. */
  overflow-x: hidden;
}

img, svg { max-width: 100%; }

a { color: var(--brand-ink); text-underline-offset: 3px; }
a:hover { text-decoration-thickness: 2px; }

:focus-visible {
  outline: 3px solid var(--accent);
  outline-offset: 2px;
  border-radius: 4px;
}

.sr-only, .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;
}

.skip {
  position: absolute; left: 0.5rem; top: -4rem; z-index: 50;
  background: var(--surface); color: var(--ink); padding: 0.75rem 1rem;
  border-radius: var(--radius-sm); border: 1px solid var(--line);
}
.skip:focus { top: 0.5rem; }

.preview-banner {
  background: #78350f;
  color: #fff7ed;
  font-size: 0.875rem;
  padding: 0.4rem 1rem;
  text-align: center;
}
.preview-banner strong { letter-spacing: 0.02em; }

.site-header {
  display: flex; flex-wrap: wrap; gap: 0.75rem 1.5rem; align-items: center;
  justify-content: space-between;
  max-width: var(--maxw); margin: 0 auto; padding: 1rem 1.25rem 0.75rem;
}
.brand {
  font-weight: 700; font-size: 1.2rem; letter-spacing: -0.01em;
  text-decoration: none; color: var(--ink);
  display: inline-flex; align-items: center; gap: 0.5rem;
}
.brand-mark {
  width: 1.6rem; height: 1.6rem; border-radius: 6px;
  background: var(--brand); color: #fff; display: inline-grid; place-items: center;
  font-size: 0.9rem; font-weight: 800;
}
.site-nav ul {
  display: flex; flex-wrap: wrap; gap: 0.25rem; list-style: none; margin: 0; padding: 0;
}
.site-nav a {
  display: inline-block; padding: 0.45rem 0.6rem; border-radius: 8px;
  font-size: 0.92rem; text-decoration: none; color: var(--ink-soft);
}
.site-nav a:hover, .site-nav a[aria-current="page"] { background: var(--brand-soft); color: var(--brand-ink); }

main { max-width: var(--maxw); margin: 0 auto; padding: 0.5rem 1.25rem 3rem; }
.narrow { max-width: 760px; }

.crumbs ol { display: flex; flex-wrap: wrap; gap: 0.4rem; list-style: none; padding: 0; margin: 0.5rem 0 0.75rem; font-size: 0.85rem; color: var(--ink-soft); }
.crumbs li + li::before { content: "›"; margin-right: 0.4rem; color: var(--ink-soft); }
.crumbs a { color: var(--ink-soft); }

h1 { font-size: clamp(1.65rem, 4vw, 2.4rem); line-height: 1.15; letter-spacing: -0.02em; margin: 0.25rem 0 0.6rem; }
h2 { font-size: clamp(1.25rem, 2.6vw, 1.6rem); line-height: 1.2; margin: 2.2rem 0 0.6rem; }
h3 { font-size: 1.08rem; margin: 1.4rem 0 0.4rem; }
p { margin: 0 0 0.85rem; max-width: 70ch; }
ul, ol { max-width: 70ch; }
.lede { font-size: 1.06rem; color: var(--ink-soft); max-width: 62ch; }
.muted { color: var(--ink-soft); }
.small { font-size: 0.875rem; }

.tool {
  display: grid; gap: 1rem; align-items: start; margin: 1rem 0 1.25rem;
}
/* Grid and flex children default to min-width:auto, i.e. their min-content width. A form
   control's min-content width is its intrinsic size (~180 px), which is how a 442 px form
   was being forced into a 335 px column at 390 px. Every child of a layout grid gets 0. */
.tool > *, .grid > *, .zone-grid > *, .zone-dims > *, .hub-grid > *, .hub-grid > *, .share-row > * { min-width: 0; }
@media (min-width: 900px) {
  .tool { grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); gap: 1.25rem; }
}
.card {
  background: var(--surface); border: 1px solid var(--line);
  border-radius: var(--radius); box-shadow: var(--shadow); padding: 1rem 1.1rem;
}
.card + .card { margin-top: 1rem; }

fieldset { border: 1px solid var(--line); border-radius: var(--radius-sm); padding: 0.8rem 0.9rem 0.9rem; margin: 0 0 0.9rem; min-width: 0; }
legend { font-weight: 650; padding: 0 0.35rem; font-size: 0.92rem; }

/* Column minimums use min(<px>, 100%) so a track can never be wider than the space it
   sits in; a bare 150px minimum overflows a 286 px fieldset content box. */
.grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(min(150px, 100%), 1fr)); gap: 0.75rem; }
.field { display: flex; flex-direction: column; gap: 0.3rem; min-width: 0; }
.field label, .field-label { font-size: 0.86rem; font-weight: 600; color: var(--ink-soft); }
/* min-width:0 on the control itself: an input's min-content width is its intrinsic size
   (~180 px), and that is what stops a grid track shrinking below the phone's column. */
input, select, button { font: inherit; color: inherit; min-width: 0; max-width: 100%; }
input[type="number"], input[type="text"], input[type="email"], select {
  width: 100%; min-height: 44px; padding: 0.5rem 0.6rem;
  background: var(--surface); border: 1px solid var(--line); border-radius: 8px;
}
input[type="number"] { font-variant-numeric: tabular-nums; }
input:hover, select:hover { border-color: var(--ink-soft); }

.units { display: flex; flex-wrap: wrap; gap: 0.35rem; }
.units label {
  display: inline-flex; align-items: center; gap: 0.4rem; min-height: 44px;
  padding: 0.3rem 0.7rem; border: 1px solid var(--line); border-radius: 999px;
  font-size: 0.9rem; cursor: pointer; background: var(--surface);
}
.units input { width: 1.1rem; height: 1.1rem; margin: 0; accent-color: var(--brand); }
.units label:has(input:checked) { background: var(--brand-soft); border-color: var(--brand); color: var(--brand-ink); font-weight: 650; }

.zone { margin-bottom: 0.8rem; }
.zone-head { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1.4fr) auto; gap: 0.6rem; align-items: end; }
.zone-grid { display: grid; gap: 0.6rem; }
.zone-dims { display: grid; grid-template-columns: repeat(auto-fit, minmax(min(130px, 100%), 1fr)); gap: 0.6rem; margin-top: 0.5rem; }
.hub-line { margin-bottom: 0.9rem; }
.hub-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(min(130px, 100%), 1fr)); gap: 0.6rem; align-items: end; }
.field-wide { grid-column: 1 / -1; }
.share-row { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); gap: 0.6rem; margin-bottom: 0.6rem; }

.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 0.4rem;
  min-height: 44px; padding: 0.45rem 0.9rem; border-radius: 999px;
  border: 1px solid var(--line); background: var(--surface); color: var(--ink);
  font-size: 0.9rem; font-weight: 600; cursor: pointer; text-decoration: none;
}
.btn:hover { border-color: var(--ink-soft); }
.btn-primary { background: var(--brand); border-color: var(--brand); color: #fff; }
.btn-primary:hover { background: var(--brand-ink); border-color: var(--brand-ink); }
.btn-quiet { background: transparent; }
.actions { display: flex; flex-wrap: wrap; gap: 0.5rem; margin-top: 0.9rem; }

.result {
  background: var(--surface); border: 1px solid var(--line);
  border-radius: var(--radius); box-shadow: var(--shadow); padding: 1rem 1.1rem; min-height: 220px;
}
.result-kicker { font-size: 0.78rem; text-transform: uppercase; letter-spacing: 0.08em; color: var(--ink-soft); margin: 0 0 0.3rem; }
.result-need { font-size: 1.18rem; line-height: 1.35; margin: 0 0 0.9rem; }
.result-need strong { color: var(--brand-ink); }
.result-buy p { margin: 0 0 0.45rem; }
.result-lines p { margin: 0 0 0.5rem; }
.compare {
  background: var(--brand-soft); color: var(--brand-ink);
  border-radius: var(--radius-sm); padding: 0.55rem 0.75rem; font-weight: 600; margin: 0.6rem 0;
}
.result-facts { margin: 0.6rem 0 0; padding-left: 1.1rem; font-size: 0.92rem; }
.result-facts li { margin-bottom: 0.3rem; }
.sub-list { margin: 0.3rem 0 0; padding-left: 1.1rem; font-size: 0.88rem; }
.result-notes { border-top: 1px solid var(--line); margin-top: 0.9rem; padding-top: 0.7rem; font-size: 0.84rem; color: var(--ink-soft); }
.result-notes p { margin: 0 0 0.4rem; max-width: none; }
.result-error { border: 2px solid var(--danger); border-radius: var(--radius-sm); padding: 0.7rem 0.85rem; color: var(--danger); }
.result-error ul { margin: 0.3rem 0 0; padding-left: 1.1rem; }
.result-warning { background: var(--surface-2); border-radius: var(--radius-sm); padding: 0.6rem 0.8rem; font-size: 0.9rem; margin-top: 0.6rem; }
.result-warning ul { margin: 0.3rem 0 0; padding-left: 1.1rem; }

#result-status { min-height: 1.4rem; font-size: 0.88rem; margin-top: 0.5rem; }

.table-wrap { overflow-x: auto; margin: 0.6rem 0; border: 1px solid var(--line); border-radius: var(--radius-sm); }

/* Formula and worked-example notation: fixed-width, so it scrolls inside its own block
   instead of widening the page at 768 px or below. */
.formula {
  overflow-x: auto; max-width: 100%; margin: 0.6rem 0;
  padding: 0.75rem 0.85rem; background: var(--surface-2);
  border: 1px solid var(--line); border-radius: var(--radius-sm);
  font-family: var(--mono); font-size: 0.85rem; line-height: 1.55;
  -webkit-overflow-scrolling: touch;
}
table { border-collapse: collapse; width: 100%; font-size: 0.9rem; }
caption { text-align: left; padding: 0.5rem 0.6rem; font-weight: 650; font-size: 0.86rem; color: var(--ink-soft); }
th, td { padding: 0.45rem 0.6rem; text-align: left; vertical-align: top; border-bottom: 1px solid var(--line); }
thead th { background: var(--surface-2); font-size: 0.82rem; text-transform: uppercase; letter-spacing: 0.04em; }
tfoot th, tfoot td { border-top: 2px solid var(--line); border-bottom: 0; font-weight: 650; }
tbody th[scope="row"] { font-weight: 600; }

.ad-slot {
  display: flex; align-items: center; justify-content: center;
  margin: 1.5rem 0; border: 1px dashed var(--line); border-radius: var(--radius-sm);
  background: var(--surface-2); color: var(--ink-soft); font-size: 0.8rem;
  text-transform: uppercase; letter-spacing: 0.08em;
  height: 250px;
}
.ad-slot[hidden] { display: none; }
@media (min-width: 900px) { .ad-slot { height: 280px; } }

.fence {
  border-left: 4px solid var(--accent);
  background: var(--surface); border-radius: var(--radius-sm);
  padding: 0.8rem 1rem; margin: 1.5rem 0; font-size: 0.92rem;
}
.fence p { margin: 0; }
.fence strong { color: var(--accent); }

.faq details {
  background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius-sm);
  padding: 0.7rem 0.9rem; margin-bottom: 0.5rem;
}
.faq summary { cursor: pointer; font-weight: 650; min-height: 24px; }
.faq summary::marker { color: var(--brand); }
.faq p { margin: 0.5rem 0 0; }

.related ul { list-style: none; padding: 0; display: grid; gap: 0.6rem; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); }
.related li { background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius-sm); padding: 0.75rem 0.85rem; }
.related a { font-weight: 650; text-decoration: none; }
.related p { margin: 0.25rem 0 0; font-size: 0.88rem; color: var(--ink-soft); }

.sources { background: var(--surface-2); border-radius: var(--radius-sm); padding: 0.85rem 1rem; font-size: 0.86rem; color: var(--ink-soft); margin: 1.5rem 0; }
.sources p { margin: 0 0 0.5rem; max-width: none; }
.sources code { font-family: var(--mono); font-size: 0.84em; }
.corrections { font-size: 0.9rem; margin: 1rem 0 0; }

.site-footer {
  border-top: 1px solid var(--line); margin-top: 2rem; padding: 1.4rem 1.25rem 2.5rem;
  background: var(--surface);
}
.site-footer .inner { max-width: var(--maxw); margin: 0 auto; display: grid; gap: 1rem; }
.site-footer nav ul { display: flex; flex-wrap: wrap; gap: 0.4rem 1rem; list-style: none; padding: 0; margin: 0; }
.site-footer a { color: var(--ink-soft); font-size: 0.9rem; }
.site-footer p { font-size: 0.85rem; color: var(--ink-soft); margin: 0; }

.print-only { display: none; }

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: 0.001ms !important; animation-iteration-count: 1 !important; transition-duration: 0.001ms !important; scroll-behavior: auto !important; }
}

@media (forced-colors: active) {
  .card, .result, .btn, input, select, .ad-slot, .faq details { border: 1px solid CanvasText; }
  .brand-mark { forced-color-adjust: none; }
}

@media (max-width: 620px) {
  .zone-head { grid-template-columns: 1fr 1fr; }
  .zone-head .btn { grid-column: 1 / -1; justify-self: start; }
  .share-row { grid-template-columns: 1fr; }
  .site-nav a { padding: 0.5rem 0.5rem; font-size: 0.86rem; }
}

@media print {
  :root { --bg: #fff; --surface: #fff; --surface-2: #fff; --ink: #000; --ink-soft: #333; --line: #999; }
  body { background: #fff; color: #000; font-size: 11pt; }
  .preview-banner, .site-header, .site-footer, .skip, .crumbs, .site-nav,
  .tool-form, .lede, .how, .worked, .faq, .related, .fence, .sources,
  .corrections, .actions, .ad-slot, .result-live, #result-status, .page-intro { display: none !important; }
  main { max-width: none; padding: 0; }
  .tool { display: block; }
  .result { border: 0; box-shadow: none; padding: 0; }
  .print-only { display: block !important; }
  .print-summary h2 { font-size: 14pt; margin: 0 0 6pt; }
  .print-table { width: 100%; margin: 0 0 10pt; font-size: 10pt; }
  .print-table th, .print-table td { border: 0; border-bottom: 1px solid #ccc; padding: 3pt 4pt; }
  .print-caption { font-weight: bold; text-align: left; padding: 0 0 3pt; }
  .print-foot { font-size: 9pt; color: #444; }
  a { color: #000; text-decoration: none; }
  h1 { font-size: 18pt; }
}