/* =========================================================================
   Shower Seal Fit — stylesheet
   Design language: a workshop spec sheet for glass & water.
   - Cool paper, deep water-teal accent, slate ink.
   - Signature: every measurement rendered as a monospace "spec chip",
     plus thin-line blueprint diagrams.
   - System fonts only (no CDNs), mobile-first, CWV-friendly.
   ========================================================================= */

:root {
  --ink: #1c2b33;
  --ink-soft: #3b4d57;
  --muted: #5f7280;
  --paper: #f6f8f9;
  --card: #ffffff;
  --line: #d8e1e6;
  --line-soft: #e7edf0;
  --accent: #0b7285;
  --accent-deep: #095e6e;
  --accent-wash: #e3f2f5;
  --good: #2b7a3d;
  --good-wash: #e6f4e9;
  --risky: #a35a00;
  --risky-wash: #fdf0dd;
  --bad: #b42323;
  --bad-wash: #fbe9e9;
  --spec-bg: #eef4f6;
  --radius: 6px;
  --font-body: "Avenir Next", "Segoe UI", system-ui, -apple-system, Roboto, "Helvetica Neue", sans-serif;
  --font-mono: ui-monospace, "SF Mono", "Cascadia Mono", Consolas, Menlo, monospace;
  --maxw: 860px;
}

/* ------------------------------------------------------------------ base */
*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  font-family: var(--font-body);
  font-size: 1rem;
  line-height: 1.65;
  color: var(--ink);
  background: var(--paper);
}
img, svg { max-width: 100%; height: auto; }
a { color: var(--accent); text-underline-offset: 2px; }
a:hover { color: var(--accent-deep); }
:focus-visible { outline: 3px solid var(--accent); outline-offset: 2px; border-radius: 2px; }

h1, h2, h3 {
  line-height: 1.22;
  letter-spacing: -0.015em;
  color: var(--ink);
  font-weight: 750;
}
h1 { font-size: clamp(1.65rem, 4.5vw, 2.3rem); margin: 0.4em 0 0.5em; }
h2 { font-size: clamp(1.25rem, 3vw, 1.5rem); margin: 0 0 0.6em; }
h3 { font-size: 1.08rem; margin: 1.2em 0 0.5em; }
p { margin: 0 0 1em; }
ul, ol { padding-left: 1.3em; margin: 0 0 1em; }
li { margin-bottom: 0.35em; }

.visually-hidden {
  position: absolute; width: 1px; height: 1px; margin: -1px;
  padding: 0; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; border: 0;
}
.skip {
  position: absolute; left: -999px; top: 0; z-index: 100;
  background: var(--ink); color: #fff; padding: 0.6em 1em; border-radius: 0 0 var(--radius) 0;
}
.skip:focus { left: 0; }
.muted { color: var(--muted); font-size: 0.92em; }

/* ---------------------------------------------------------- spec chips */
.spec {
  font-family: var(--font-mono);
  font-size: 0.92em;
  background: var(--spec-bg);
  border: 1px solid var(--line);
  border-radius: 4px;
  padding: 0.08em 0.4em;
  white-space: nowrap;
  color: var(--ink);
}
.spec-sub { color: var(--muted); font-size: 0.88em; }
.spec-line { font-size: 1.02rem; margin: -0.2em 0 0.8em; }

/* ---------------------------------------------------------------- header */
.site-head {
  background: var(--card);
  border-bottom: 2px solid var(--accent);
}
.site-head__inner {
  max-width: 1180px; margin: 0 auto; padding: 0.65rem 1rem;
  display: flex; align-items: center; gap: 1rem; flex-wrap: wrap;
}
.brand { display: inline-flex; align-items: center; gap: 0.55rem; text-decoration: none; color: var(--ink); }
.brand__mark { color: var(--accent); flex: none; }
.brand__name { font-weight: 800; letter-spacing: -0.02em; font-size: 1.12rem; }
.nav-toggle {
  margin-left: auto;
  font: inherit; font-weight: 600;
  background: none; border: 1.5px solid var(--line); border-radius: var(--radius);
  padding: 0.35em 0.9em; color: var(--ink); cursor: pointer;
}
.site-nav { display: none; width: 100%; flex-direction: column; gap: 0.15rem; padding-top: 0.4rem; }
.site-nav.is-open { display: flex; }
.site-nav a {
  text-decoration: none; color: var(--ink-soft); font-weight: 600;
  padding: 0.45em 0.4em; border-radius: 4px;
}
.site-nav a:hover { background: var(--accent-wash); color: var(--accent-deep); }
@media (min-width: 760px) {
  .nav-toggle { display: none; }
  .site-nav { display: flex; width: auto; flex-direction: row; gap: 0.4rem; margin-left: auto; padding: 0; }
}

/* ---------------------------------------------------------------- layout */
.page { max-width: 1180px; margin: 0 auto; padding: 0 1rem 3rem; }
.content { max-width: var(--maxw); margin: 0 auto; }
.rail { display: none; }
@media (min-width: 1120px) {
  .page--rail { display: grid; grid-template-columns: minmax(0, var(--maxw)) 300px; gap: 2.2rem; justify-content: center; }
  .page--rail .content { margin: 0; }
  .page--rail .rail { display: block; padding-top: 4.4rem; }
  .rail .ad-slot { position: sticky; top: 1rem; }
}
.block { margin: 2.1rem 0; }

/* ----------------------------------------------------------- breadcrumbs */
.crumbs { font-size: 0.86rem; margin-top: 1rem; }
.crumbs ol { list-style: none; padding: 0; margin: 0; display: flex; flex-wrap: wrap; gap: 0.15em; }
.crumbs li + li::before { content: "›"; color: var(--muted); padding: 0 0.45em; }
.crumbs a { color: var(--muted); text-decoration: none; }
.crumbs a:hover { color: var(--accent); text-decoration: underline; }
.crumbs [aria-current] { color: var(--ink-soft); }

/* ------------------------------------------------------------------ hero */
.hero { margin: 1.4rem 0 0.5rem; }
.hero__sub { font-size: 1.08rem; color: var(--ink-soft); max-width: 62ch; }

/* ---------------------------------------------------------- quick answer */
.quick {
  border-left: 4px solid var(--accent);
  background: var(--card);
  border-radius: 0 var(--radius) var(--radius) 0;
  padding: 0.9rem 1.1rem;
  margin: 1.1rem 0 1.2rem;
  box-shadow: 0 1px 2px rgba(28, 43, 51, 0.05);
}
.quick__label {
  font-family: var(--font-mono);
  font-size: 0.72rem; text-transform: uppercase; letter-spacing: 0.12em;
  color: var(--accent-deep); margin: 0 0 0.35em;
}
.quick__text { margin: 0; font-size: 1.03rem; }

/* ----------------------------------------------------------------- forms */
.field { display: block; }
.field__label { display: block; font-weight: 650; font-size: 0.9rem; margin-bottom: 0.3em; }
input[type="text"], input[type="search"], select {
  font: inherit; color: var(--ink);
  width: 100%; padding: 0.55em 0.7em;
  border: 1.5px solid var(--line); border-radius: var(--radius);
  background: var(--card);
}
select { appearance: auto; }
input:focus, select:focus { border-color: var(--accent); outline: none; box-shadow: 0 0 0 3px var(--accent-wash); }

.finder {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 1.2rem;
  box-shadow: 0 1px 3px rgba(28, 43, 51, 0.06);
}
.finder__grid { display: grid; gap: 0.9rem 1.2rem; grid-template-columns: 1fr; }
@media (min-width: 620px) { .finder__grid { grid-template-columns: 1fr 1fr; } }
@media (min-width: 900px) { .finder__grid { grid-template-columns: 1fr 1fr 1fr; } }
.field__custom { display: flex; gap: 0.5rem; margin-top: 0.45rem; }
.field__custom input { flex: 1 1 auto; }
.field__custom select { flex: 0 0 5.2em; width: auto; }
.js .is-hidden-js { display: none; }
.finder__actions { margin: 1.1rem 0 0.2rem; }

/* --------------------------------------------------------------- buttons */
.btn {
  display: inline-block;
  font: inherit; font-weight: 700;
  border: 1.5px solid transparent; border-radius: var(--radius);
  padding: 0.6em 1.25em;
  cursor: pointer; text-decoration: none; text-align: center;
}
.btn--primary { background: var(--accent); color: #fff; }
.btn--primary:hover { background: var(--accent-deep); color: #fff; }
.btn--amazon { background: var(--ink); color: #fff; }
.btn--amazon::after { content: " →"; }
.btn--amazon:hover { background: #0f171c; color: #fff; }
.btn--ghost { background: none; border-color: var(--line); color: var(--ink-soft); padding: 0.4em 0.9em; font-weight: 600; }
.btn--ghost:hover { border-color: var(--accent); color: var(--accent-deep); }

/* ---------------------------------------------------------------- badges */
.badge {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.72rem; letter-spacing: 0.04em;
  border-radius: 999px; padding: 0.18em 0.7em;
  border: 1px solid var(--line); background: var(--paper); color: var(--ink-soft);
}
.badge--type { background: var(--accent-wash); border-color: transparent; color: var(--accent-deep); }
.badge--good { background: var(--good-wash); border-color: transparent; color: var(--good); }
.badge--risky { background: var(--risky-wash); border-color: transparent; color: var(--risky); }
.badge--no { background: var(--bad-wash); border-color: transparent; color: var(--bad); }

/* --------------------------------------------------------------- callouts */
.callout {
  border: 1px solid var(--line);
  border-left-width: 4px;
  border-radius: 0 var(--radius) var(--radius) 0;
  background: var(--card);
  padding: 0.85rem 1.05rem;
  margin: 1.6rem 0;
}
.callout__title {
  font-family: var(--font-mono);
  font-size: 0.74rem; text-transform: uppercase; letter-spacing: 0.11em;
  margin: 0 0 0.35em;
}
.callout p:last-child { margin-bottom: 0; }
.callout--info { border-left-color: var(--accent); }
.callout--info .callout__title { color: var(--accent-deep); }
.callout--warn { border-left-color: var(--risky); background: var(--risky-wash); }
.callout--warn .callout__title { color: var(--risky); }
.callout--error { border-left-color: var(--bad); background: var(--bad-wash); }
.callout--error .callout__title { color: var(--bad); }
.callout--error ul { margin-bottom: 0; }

/* ------------------------------------------------------------------ lists */
.check-list, .x-list { list-style: none; padding-left: 0; }
.check-list li, .x-list li { padding-left: 1.6em; position: relative; }
.check-list li::before {
  content: "✓"; position: absolute; left: 0; top: 0;
  color: var(--good); font-weight: 800;
}
.x-list li::before {
  content: "✕"; position: absolute; left: 0; top: 0;
  color: var(--bad); font-weight: 800;
}
.steps { counter-reset: step; list-style: none; padding-left: 0; }
.steps > li {
  counter-increment: step;
  padding-left: 2.5em; position: relative; margin-bottom: 0.9em;
}
.steps > li::before {
  content: counter(step);
  position: absolute; left: 0; top: 0.05em;
  width: 1.7em; height: 1.7em; border-radius: 50%;
  background: var(--accent-wash); color: var(--accent-deep);
  font-family: var(--font-mono); font-weight: 700; font-size: 0.9em;
  display: flex; align-items: center; justify-content: center;
}

/* ----------------------------------------------------------------- tables */
.table-wrap { overflow-x: auto; margin: 1rem 0 1.4rem; -webkit-overflow-scrolling: touch; }
table { border-collapse: collapse; width: 100%; min-width: 480px; background: var(--card); font-size: 0.95rem; }
caption {
  caption-side: top; text-align: left;
  font-size: 0.85rem; color: var(--muted); padding-bottom: 0.4em;
}
th, td { border: 1px solid var(--line); padding: 0.55em 0.7em; text-align: left; vertical-align: top; }
th { background: var(--spec-bg); font-weight: 700; font-size: 0.88rem; }
tbody tr:nth-child(even) { background: #fbfcfd; }
tr.row-hl td { background: var(--accent-wash); }

/* ---------------------------------------------------------- product cards */
.disclosure {
  font-size: 0.85rem; color: var(--muted);
  border-top: 1px dashed var(--line); border-bottom: 1px dashed var(--line);
  padding: 0.45em 0; margin: 1.2rem 0;
}
.pgrid { display: grid; gap: 1.1rem; grid-template-columns: 1fr; margin: 1.1rem 0; }
@media (min-width: 680px) { .pgrid { grid-template-columns: 1fr 1fr; } }
.pcard {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 1rem 1.05rem;
  display: flex; flex-direction: column; gap: 0.55rem;
  box-shadow: 0 1px 2px rgba(28, 43, 51, 0.05);
}
.pcard__head { display: flex; align-items: center; gap: 0.55rem; flex-wrap: wrap; }
.pcard__icon { color: var(--accent); display: inline-flex; }
.pcard__name { margin: 0; font-size: 1.02rem; line-height: 1.35; }
.pcard__specs {
  margin: 0; display: grid; grid-template-columns: 1fr 1fr; gap: 0.25rem 0.9rem;
  font-size: 0.88rem;
}
.pcard__specs dt { color: var(--muted); font-size: 0.74rem; text-transform: uppercase; letter-spacing: 0.07em; }
.pcard__specs dd { margin: 0; }
.pcard__note { margin: 0; font-size: 0.92rem; color: var(--ink-soft); }
.pcard__warn {
  margin: 0; font-size: 0.88rem; color: var(--risky);
  background: var(--risky-wash); border-radius: 4px; padding: 0.35em 0.6em;
}
.pcard__reasons { margin: 0; padding-left: 1.15em; font-size: 0.86rem; color: var(--muted); }
.pcard__cta { display: flex; align-items: center; gap: 0.9rem; flex-wrap: wrap; margin-top: auto; padding-top: 0.3rem; }
.pcard__guide { font-size: 0.9rem; }
.pcard__meta { margin: 0; font-family: var(--font-mono); font-size: 0.72rem; color: var(--muted); }
.empty {
  background: var(--card); border: 1px dashed var(--line); border-radius: var(--radius);
  padding: 0.9rem 1.05rem; color: var(--ink-soft);
}

/* --------------------------------------------------------- finder results */
.results { scroll-margin-top: 1rem; }
.summary {
  background: var(--card); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 1rem 1.1rem; margin: 1rem 0 1.3rem;
}
.summary__grid { margin: 0; display: grid; gap: 0.7rem 1.4rem; grid-template-columns: 1fr; }
@media (min-width: 620px) { .summary__grid { grid-template-columns: 1fr 1fr; } }
.summary__grid dt { color: var(--muted); font-size: 0.76rem; text-transform: uppercase; letter-spacing: 0.08em; }
.summary__grid dd { margin: 0.1em 0 0; font-weight: 650; }

/* ------------------------------------------------------------------ chips */
.chips { display: flex; flex-wrap: wrap; gap: 0.55rem; }
.chip {
  display: inline-flex; align-items: center; gap: 0.45em;
  border: 1.5px solid var(--line); border-radius: 999px;
  background: var(--card); color: var(--ink);
  padding: 0.35em 0.95em; text-decoration: none; font-weight: 600; font-size: 0.94rem;
}
.chip:hover { border-color: var(--accent); color: var(--accent-deep); }
.chip__icon { color: var(--accent); }

/* ----------------------------------------------------------------- diagram */
.diagram {
  margin: 1.6rem 0; padding: 1rem;
  background: var(--card); border: 1px solid var(--line); border-radius: var(--radius);
}
.diagram__svg { display: block; width: 100%; max-width: 520px; margin: 0 auto; }
.diagram figcaption { font-size: 0.88rem; color: var(--muted); margin-top: 0.6rem; }
.dg-curb { fill: var(--spec-bg); stroke: var(--line); }
.dg-glass { fill: #dff0f4; stroke: var(--accent); stroke-width: 1.5; }
.dg-seal { fill: var(--accent-wash); stroke: var(--accent-deep); stroke-width: 1.3; }
.dg-wipe { fill: none; stroke: var(--accent-deep); stroke-width: 1.3; }
.dg-rail { fill: var(--accent-wash); stroke: var(--accent-deep); stroke-width: 1.3; }
.dg-dim { stroke: var(--ink-soft); stroke-width: 1.2; }
.dg-guide { stroke: var(--line); stroke-dasharray: 4 3; }
.dg-label { font-family: var(--font-mono); font-size: 11px; fill: var(--muted); }
.dg-dim-label { font-family: var(--font-mono); font-size: 11.5px; fill: var(--ink); font-weight: 600; }

/* --------------------------------------------------------------- converter */
.converter { background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); padding: 1rem 1.1rem; }
.converter__row { display: grid; gap: 0.8rem; grid-template-columns: 1fr; align-items: end; }
@media (min-width: 620px) { .converter__row { grid-template-columns: 2fr 1fr 3fr; } }
.converter__out { margin: 0; font-size: 1rem; }

/* ------------------------------------------------------------------ helper */
.helper { margin-top: 1rem; }
.helper > summary, .faq__item > summary {
  cursor: pointer; font-weight: 650; padding: 0.5em 0.2em;
  list-style-position: inside;
}
.helper > summary:hover, .faq__item > summary:hover { color: var(--accent-deep); }
.helper__body { padding: 0.3em 0.4em 0.6em; }

/* -------------------------------------------------------------------- FAQ */
.faq__item { border-top: 1px solid var(--line-soft); }
.faq__item:last-child { border-bottom: 1px solid var(--line-soft); }
.faq__item p { margin: 0 0 0.9em; padding: 0 0.2em; color: var(--ink-soft); }

/* -------------------------------------------------------- misc components */
.related ul, .pop-links { list-style: none; padding: 0; columns: 1; }
@media (min-width: 620px) { .related ul, .pop-links { columns: 2; column-gap: 2rem; } }
.related li, .pop-links li { break-inside: avoid; padding: 0.22em 0; }
.reviewed { font-family: var(--font-mono); font-size: 0.76rem; color: var(--muted); margin: -0.4em 0 1.4em; }
.start-grid { display: grid; gap: 1.4rem; grid-template-columns: 1fr; }
@media (min-width: 720px) { .start-grid { grid-template-columns: 1fr 1fr 1fr; } }
.start-grid h3 { margin-top: 0; }
.start-grid ul { list-style: none; padding: 0; }
.twin { display: grid; gap: 1.4rem; grid-template-columns: 1fr; }
@media (min-width: 680px) { .twin { grid-template-columns: 1fr 1fr; } }
.hub-list { list-style: none; padding: 0; display: grid; gap: 1rem; }
.hub-item {
  background: var(--card); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 0.9rem 1.05rem;
}
.hub-item h2 { font-size: 1.12rem; margin: 0 0 0.35em; }
.hub-item p { margin: 0; font-size: 0.94rem; color: var(--ink-soft); }
.searchform { display: flex; gap: 0.7rem; align-items: end; max-width: 560px; margin: 1.2rem 0 1.6rem; }
.searchform .field { flex: 1; }
.contact-email { font-size: 1.35rem; font-weight: 700; }
.prose h2 { margin-top: 1.6em; }
.prose code { font-family: var(--font-mono); background: var(--spec-bg); padding: 0.1em 0.35em; border-radius: 3px; font-size: 0.9em; }

/* --------------------------------------------------------------- ad slots */
.ad-slot { margin: 1.8rem 0; min-height: 120px; text-align: center; }
.rail .ad-slot { min-height: 250px; }

/* ----------------------------------------------------------------- footer */
.site-foot { border-top: 2px solid var(--accent); background: var(--card); margin-top: 2rem; }
.site-foot__grid {
  max-width: 1180px; margin: 0 auto; padding: 1.8rem 1rem 0.6rem;
  display: grid; gap: 1.4rem; grid-template-columns: 1fr 1fr;
}
@media (min-width: 820px) { .site-foot__grid { grid-template-columns: repeat(4, 1fr); } }
.foot-h { font-size: 0.8rem; text-transform: uppercase; letter-spacing: 0.09em; color: var(--muted); margin: 0 0 0.5em; }
.site-foot ul { list-style: none; padding: 0; margin: 0; font-size: 0.9rem; }
.site-foot li { padding: 0.14em 0; }
.site-foot a { color: var(--ink-soft); text-decoration: none; }
.site-foot a:hover { color: var(--accent-deep); text-decoration: underline; }
.site-foot__meta {
  max-width: 1180px; margin: 0 auto; padding: 0.8rem 1rem 1.6rem;
  font-size: 0.8rem; color: var(--muted);
  border-top: 1px solid var(--line-soft);
}
.site-foot__meta p { margin: 0.3em 0; }

/* ------------------------------------------------------------------ motion */
@media (prefers-reduced-motion: no-preference) {
  html { scroll-behavior: smooth; }
}

/* ------------------------------------------------------------------- print */
@media print {
  .site-head, .site-foot, .rail, .ad-slot, .crumbs, .no-print,
  .finder, .btn, .searchform, .site-nav, .nav-toggle { display: none !important; }
  body { background: #fff; color: #000; font-size: 11pt; }
  .page { padding: 0; }
  a { color: #000; text-decoration: none; }
  .quick, .callout, .pcard, .hub-item, .diagram { box-shadow: none; border: 1px solid #999; }
  .check-list li::before { color: #000; }
}