/* Measure & Buy — shared shell styles only.
   Header, footer, directory, related grid, what-to-buy block, guide/FAQ prose.
   Calculator-specific styles live inline in each tool's index.html.

   Look: field manual / spec sheet. Ink is the primary; hi-vis orange is
   reserved for the number that matters, active state, and the accent glyph.
   Every measurement, unit, and label is set in mono. */

:root {
  /* Ink */
  --ink: #14171c;
  --ink-2: #444b55;
  --ink-3: #767e8a;

  /* Hi-vis accent. --hivis is UI/large-text only (3.0:1 on paper).
     --hivis-ink is the text-safe variant (4.9:1 on paper) — use it for
     anything under 24px. */
  --hivis: #ff5a1f;
  --hivis-ink: #c2410c;
  --hivis-tint: #fff2ec;

  /* Surfaces */
  --paper: #ffffff;
  --paper-2: #f5f6f8;
  --rule: #dcdfe4;
  --rule-soft: #eaecef;
  --grid: #e9ebef;

  --font: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto,
    Helvetica, Arial, sans-serif;
  --mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas,
    "Liberation Mono", monospace;

  --radius: 3px;
  --wrap: 1080px;
  --prose: 700px;
}

* { box-sizing: border-box; }

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

body {
  margin: 0;
  font-family: var(--font);
  font-size: 17px;
  line-height: 1.6;
  color: var(--ink);
  background: var(--paper);
  -webkit-font-smoothing: antialiased;
}

a { color: var(--hivis-ink); }
a:hover { color: var(--ink); }

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

.wrap { max-width: var(--wrap); margin: 0 auto; padding: 0 22px; }
.prose { max-width: var(--prose); }

/* Mono utilities. Numbers are tabular everywhere so columns line up. */

.mono, .num {
  font-family: var(--mono);
  font-variant-numeric: tabular-nums;
}

.label {
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--ink-3);
}

/* Ruler rule — the signature edge. Minor ticks every 8px, major every 64px,
   both rising from a solid baseline. Used under the header and above the
   footer. */

.ruler {
  height: 9px;
  background-color: var(--paper);
  background-image:
    repeating-linear-gradient(90deg, var(--ink) 0 1px, transparent 1px 64px),
    repeating-linear-gradient(90deg, var(--rule) 0 1px, transparent 1px 8px);
  background-size: 100% 9px, 100% 5px;
  background-position: left bottom, left bottom;
  background-repeat: repeat-x;
  border-bottom: 1px solid var(--ink);
}

/* Header */

.site-header { background: var(--paper); }
.site-header .wrap {
  display: flex;
  align-items: baseline;
  gap: 14px;
  padding-top: 18px;
  padding-bottom: 16px;
}
.wordmark {
  font-size: 19px;
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--ink);
  text-decoration: none;
}
.wordmark .amp { color: var(--hivis); }
.wordmark:hover { color: var(--ink); }
.wordmark:hover .amp { color: var(--hivis-ink); }
.site-header .tagline {
  margin: 0;
  font-family: var(--mono);
  font-size: 11.5px;
  letter-spacing: 0.13em;
  text-transform: uppercase;
  color: var(--ink-3);
}
@media (max-width: 560px) {
  .site-header .tagline { display: none; }
}

/* Homepage hero — graph paper fading out, text-forward, no imagery */

.intro {
  position: relative;
  padding: 52px 0 30px;
}
/* Graph paper sits on its own layer so the fade never touches the type */
.intro::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(var(--grid) 1px, transparent 1px),
    linear-gradient(90deg, var(--grid) 1px, transparent 1px);
  background-size: 26px 26px;
  -webkit-mask-image: linear-gradient(to bottom, #000 0%, transparent 82%);
  mask-image: linear-gradient(to bottom, #000 0%, transparent 82%);
  pointer-events: none;
}
.intro .wrap { position: relative; }
.intro .kicker { margin: 0 0 14px; }
.intro h1 {
  margin: 0 0 14px;
  font-size: clamp(32px, 6vw, 52px);
  line-height: 1.05;
  letter-spacing: -0.035em;
}
/* Break between the two sentences, never mid-clause */
.intro h1 span { display: block; }
.intro .lede {
  margin: 0;
  max-width: var(--prose);
  font-size: 18px;
  color: var(--ink-2);
}

/* Spec strip — three standing promises, read as a datasheet row */

.spec-strip {
  border-top: 1px solid var(--ink);
  border-bottom: 1px solid var(--rule);
  background: var(--paper);
}
.spec-strip ul {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0;
  margin: 0;
  padding: 0;
  list-style: none;
}
.spec-strip li {
  padding: 16px 22px 18px;
  border-left: 1px solid var(--rule);
}
.spec-strip li:first-child { border-left: 0; padding-left: 0; }
.spec-strip .k { display: block; margin-bottom: 4px; }
.spec-strip .v {
  font-size: 15px;
  color: var(--ink-2);
}
@media (max-width: 720px) {
  .spec-strip ul { grid-template-columns: 1fr; }
  .spec-strip li {
    border-left: 0;
    border-top: 1px solid var(--rule-soft);
    padding: 13px 0 14px;
  }
  .spec-strip li:first-child { border-top: 0; }
}

/* Tool directory */

.directory { padding: 8px 0 48px; }

/* Numbered section header with a rule running to the margin */
.sec {
  display: flex;
  align-items: center;
  gap: 12px;
  margin: 40px 0 16px;
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.13em;
  text-transform: uppercase;
}
.sec::after {
  content: "";
  flex: 1;
  height: 1px;
  background: var(--rule);
}
.sec .n {
  font-family: var(--mono);
  font-weight: 400;
  letter-spacing: 0;
  color: var(--hivis-ink);
}

.tool-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(248px, 1fr));
  gap: 12px;
  padding: 0;
  margin: 0;
  list-style: none;
}

.tool-card {
  position: relative;
  display: flex;
  flex-direction: column;
  border: 1px solid var(--rule);
  border-radius: var(--radius);
  padding: 15px 16px 12px;
  background: var(--paper);
}
/* Hi-vis edge on the live cards, drawn on hover/focus */
.tool-card::before {
  content: "";
  position: absolute;
  left: -1px;
  right: -1px;
  top: -1px;
  height: 3px;
  border-radius: var(--radius) var(--radius) 0 0;
  background: var(--hivis);
  opacity: 0;
  transition: opacity 120ms ease;
}
.tool-card:hover:not(.is-soon)::before,
.tool-card:focus-within:not(.is-soon)::before { opacity: 1; }
.tool-card:hover:not(.is-soon) { border-color: var(--ink); }

.tool-card h3 {
  margin: 0 0 5px;
  font-size: 16.5px;
  letter-spacing: -0.01em;
}
.tool-card h3 a { color: var(--ink); text-decoration: none; }
.tool-card h3 a:hover { color: var(--ink); }
.tool-card p {
  margin: 0 0 14px;
  font-size: 14.5px;
  line-height: 1.5;
  color: var(--ink-2);
}

/* Card footer: what unit it answers in, and whether it's built */
.tool-meta {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 10px;
  margin-top: auto;
  padding-top: 10px;
  border-top: 1px solid var(--rule-soft);
  font-family: var(--mono);
  font-size: 12px;
}
.tool-meta .unit { color: var(--ink-2); }
.tool-meta .unit .arrow { color: var(--hivis-ink); }
.tool-meta .status { color: var(--ink-3); letter-spacing: 0.06em; }

.tool-card.is-soon { background: var(--paper-2); border-style: dashed; }
.tool-card.is-soon h3 { color: var(--ink-2); }
.tool-card.is-soon .tool-meta { border-top-color: var(--rule); }

/* Trust block — numbered field notes */

.trust {
  background: var(--paper-2);
  border-top: 1px solid var(--ink);
  padding: 40px 0 46px;
}
.trust h2 {
  margin: 0 0 20px;
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.13em;
  text-transform: uppercase;
}
.trust ol {
  max-width: var(--prose);
  margin: 0;
  padding: 0;
  list-style: none;
  counter-reset: note;
}
.trust li {
  position: relative;
  padding: 14px 0 14px 44px;
  border-top: 1px solid var(--rule);
  color: var(--ink-2);
}
.trust li:first-child { border-top: 0; padding-top: 0; }
.trust li::before {
  counter-increment: note;
  content: counter(note, decimal-leading-zero);
  position: absolute;
  left: 0;
  top: 15px;
  font-family: var(--mono);
  font-size: 12px;
  color: var(--hivis-ink);
}
.trust li:first-child::before { top: 1px; }

/* Result block (tool pages — the answer, above everything else) */

.result {
  max-width: var(--prose);
  border: 2px solid var(--ink);
  border-radius: var(--radius);
  padding: 18px 20px 20px;
  margin: 22px 0;
  background: var(--paper);
}
.result .answer {
  margin: 8px 0 0;
  font-size: clamp(21px, 3.4vw, 27px);
  line-height: 1.3;
  letter-spacing: -0.02em;
}
.result .answer .num {
  font-weight: 700;
  color: var(--hivis-ink);
}
.result .raw {
  margin: 12px 0 0;
  padding-top: 12px;
  border-top: 1px solid var(--rule);
  font-family: var(--mono);
  font-size: 13px;
  color: var(--ink-2);
}

/* Guide + FAQ prose (tool pages) */

.guide, .faq { padding: 8px 0 24px; }
.guide h2, .faq h2 {
  font-size: 23px;
  margin: 38px 0 12px;
  letter-spacing: -0.02em;
}
.guide h3, .faq h3 { font-size: 18px; margin: 26px 0 8px; letter-spacing: -0.01em; }
.guide p, .faq p, .guide li { max-width: var(--prose); }

.guide .formula {
  max-width: var(--prose);
  padding: 15px 18px;
  border: 1px solid var(--rule);
  border-left: 3px solid var(--hivis);
  background: var(--paper-2);
  border-radius: 0 var(--radius) var(--radius) 0;
  font-family: var(--mono);
  font-variant-numeric: tabular-nums;
  font-size: 14.5px;
  line-height: 1.7;
  overflow-x: auto;
}
/* Source citation inline in the guide */
.guide .source {
  display: block;
  margin-top: 6px;
  font-family: var(--mono);
  font-size: 12px;
  color: var(--ink-3);
}

/* "What to buy" block (tool pages, below results) */

.buy-block {
  max-width: var(--prose);
  border: 1px solid var(--rule);
  border-radius: var(--radius);
  padding: 18px 20px;
  margin: 26px 0;
}
.buy-block h2 {
  margin: 0 0 4px;
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.13em;
  text-transform: uppercase;
}
.buy-block .disclosure {
  font-family: var(--mono);
  font-size: 12px;
  color: var(--ink-3);
  margin: 0 0 14px;
}
.buy-block ul { margin: 0; padding: 0; list-style: none; }
.buy-block li { padding: 11px 0; border-top: 1px solid var(--rule-soft); }
.buy-block li:first-child { border-top: 0; padding-top: 0; }
.buy-block .why { font-size: 14.5px; color: var(--ink-2); margin: 2px 0 0; }

/* Related tools grid (tool pages) */

.related { padding: 10px 0 38px; }
.related h2 {
  margin: 0 0 16px;
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.13em;
  text-transform: uppercase;
}

/* Footer (injected by site.js) */

/* The footer ruler carries the gap so it stays welded to the footer below it */
.ruler.is-footer { margin-top: 48px; }
.site-footer { background: var(--paper); }
.site-footer .wrap { padding-top: 24px; padding-bottom: 30px; }
.site-footer p {
  margin: 0 0 6px;
  font-family: var(--mono);
  font-size: 12.5px;
  color: var(--ink-3);
}
.site-footer a { color: var(--ink-2); text-decoration: none; }
.site-footer a:hover { color: var(--hivis-ink); text-decoration: underline; }
#traffic-layer:not(:empty) { margin-bottom: 20px; }

/* Generic page content (404 and other shell pages) */

.page { padding: 56px 0 40px; }
.page h1 { margin: 0 0 12px; font-size: 32px; letter-spacing: -0.03em; }
.page p { max-width: var(--prose); }

@media (prefers-reduced-motion: reduce) {
  * { transition: none !important; }
}