:root {
  --ink: #1f1d1b;
  --muted: #5d5853;
  --paper: #faf7f2;
  --card: #ffffff;
  --line: #e2d9cc;
  --ember: #c4532c;
  --ember-dark: #9c3f1f;
  --soot: #24201d;
  --stone: #efe8dd;
  --ok: #3f7d4e;
  --max: 1120px;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font: 17px/1.6 "Public Sans", system-ui, -apple-system, "Segoe UI", sans-serif;
}
img { max-width: 100%; display: block; }
a { color: var(--ember-dark); }
h1, h2, h3 { font-family: "Zilla Slab", Rockwell, Georgia, serif; line-height: 1.15; margin: 0 0 .5em; letter-spacing: -0.01em; }
h1 { font-size: clamp(2.2rem, 5vw, 3.6rem); font-weight: 700; }
h2 { font-size: clamp(1.7rem, 3.2vw, 2.4rem); font-weight: 650; }
h3 { font-size: 1.25rem; font-weight: 650; }
p { margin: 0 0 1em; }
.wrap { max-width: var(--max); margin: 0 auto; padding-left: max(20px, env(safe-area-inset-left, 0px)); padding-right: max(20px, env(safe-area-inset-right, 0px)); }
.eyebrow { text-transform: uppercase; letter-spacing: .12em; font-size: .78rem; font-weight: 700; color: var(--ember); margin-bottom: .6em; }

/* header */
.site-header { background: var(--soot); color: #f3ece2; position: sticky; top: env(safe-area-inset-top, 0px); z-index: 10; }
body::before { content: ""; position: fixed; inset: 0 0 auto; height: env(safe-area-inset-top, 0px); z-index: 11; background: var(--soot); }
:root { color-scheme: light; }
a:focus-visible, button:focus-visible, input:focus-visible, textarea:focus-visible { outline: 3px solid var(--ember); outline-offset: 2px; }
h1, h2, h3 { text-wrap: balance; }
.split > *, .guide-item > * { min-width: 0; }
.site-header .wrap { display: flex; align-items: center; justify-content: space-between; gap: 16px; min-height: 64px; flex-wrap: wrap; }
.brand { font-family: "Zilla Slab", Rockwell, Georgia, serif; font-size: 1.35rem; font-weight: 700; color: #fff; text-decoration: none; }
.brand span { color: #f0a36e; }
.nav { display: flex; gap: 18px; flex-wrap: wrap; align-items: center; }
.nav a { color: #e8dfd3; text-decoration: none; font-size: .95rem; }
.nav a:hover, .nav a[aria-current="page"] { color: #fff; text-decoration: underline; text-underline-offset: 4px; }
.nav .call { background: var(--ember); color: #fff; padding: 8px 14px; border-radius: 999px; font-weight: 600; }
.nav .call:hover { background: var(--ember-dark); text-decoration: none; }

/* hero */
.hero { background: linear-gradient(180deg, var(--soot) 0%, #3a2f28 100%); color: #f6efe6; padding: 72px 0 84px; }
.hero p.lead { font-size: 1.2rem; max-width: 640px; color: #e5dacd; }
.hero .eyebrow { color: #f0a36e; }
.btns { display: flex; gap: 12px; flex-wrap: wrap; margin-top: 28px; }
.btn { display: inline-block; padding: 13px 22px; border-radius: 10px; font-weight: 650; text-decoration: none; }
.btn-primary { background: var(--ember); color: #fff; }
.btn-primary:hover { background: var(--ember-dark); }
.btn-ghost { border: 2px solid #e5dacd; color: #fff; }
.btn-ghost:hover { background: rgba(255,255,255,.08); }
.btn-dark { background: var(--soot); color: #fff; }

section { padding: 72px 0; }
section.alt { background: var(--stone); }

.split { display: grid; grid-template-columns: 1fr 1.1fr; gap: 48px; align-items: center; }
.figure-card { background: var(--card); border: 1px solid var(--line); border-radius: 14px; padding: 10px; box-shadow: 0 10px 30px rgba(36,32,29,.08); }
.figure-card a { display: block; }

.cards { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; margin-top: 32px; }
.card { background: var(--card); border: 1px solid var(--line); border-radius: 14px; padding: 26px; }
.card .num { font-family: "Zilla Slab", Rockwell, Georgia, serif; font-size: 2rem; color: var(--ember); line-height: 1; margin-bottom: 10px; }

.services { display: grid; grid-template-columns: repeat(2, 1fr); gap: 0 40px; margin-top: 28px; }
.svc { padding: 18px 0; border-bottom: 1px solid var(--line); }
.svc h3 { margin-bottom: .25em; font-size: 1.12rem; }
.svc p { margin: 0; color: var(--muted); }

.labels { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; margin-top: 24px; }
.label { border-radius: 12px; padding: 20px; background: var(--card); border: 1px solid var(--line); border-top: 6px solid; }
.label.hazard { border-top-color: #c8372d; }
.label.def { border-top-color: #d9901f; }
.label.noted { border-top-color: var(--ok); }
.label h3 { font-size: 1.05rem; }

.quote { font-family: "Zilla Slab", Rockwell, Georgia, serif; font-size: 1.35rem; line-height: 1.45; border-left: 5px solid var(--ember); padding-left: 22px; margin: 28px 0; }

/* guide */
.guide-item { display: grid; grid-template-columns: 1.5fr 1fr; gap: 40px; padding: 48px 0; border-bottom: 1px solid var(--line); align-items: start; }
.guide-item:last-of-type { border-bottom: 0; }
.guide-item ul { padding-left: 1.1em; margin: 0 0 1em; }
.guide-item li { margin-bottom: .5em; }
.ref { font-size: .85rem; color: var(--muted); }
.callout { background: #fff4ec; border: 1px solid #f1cdb6; border-radius: 12px; padding: 18px 20px; margin-top: 14px; }
.toc { display: flex; gap: 10px; flex-wrap: wrap; margin-top: 22px; }
.toc a { background: var(--card); border: 1px solid var(--line); padding: 8px 14px; border-radius: 999px; text-decoration: none; color: var(--ink); font-size: .95rem; }
.toc a:hover { border-color: var(--ember); }

/* form */
form.contact { display: grid; gap: 14px; max-width: 560px; }
form.contact label { font-weight: 600; font-size: .95rem; display: grid; gap: 6px; }
form.contact input, form.contact textarea { font: inherit; padding: 12px 14px; border: 1px solid var(--line); border-radius: 10px; background: #fff; }
form.contact button { justify-self: start; border: 0; cursor: pointer; font: inherit; }
.hidden { display: none; }

.site-footer { background: var(--soot); color: #cfc5b8; padding: 40px 0; font-size: .92rem; }
.site-footer a { color: #f0a36e; }
.sample-banner { background: #fff4ec; color: var(--ember-dark); text-align: center; font-size: .85rem; padding: 6px 12px; border-bottom: 1px solid #f1cdb6; }

@media (max-width: 860px) {
  .split, .guide-item { grid-template-columns: 1fr; gap: 24px; }
  .cards, .labels { grid-template-columns: 1fr; }
  .services { grid-template-columns: 1fr; }
  section { padding: 52px 0; }
  .hero { padding: 52px 0 60px; }
}

.video-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 24px; }
.video-card { padding: 16px; }
.video { position: relative; aspect-ratio: 16 / 9; max-width: 100%; border-radius: 10px; overflow: hidden; background: var(--soot); margin-bottom: 14px; }
.video iframe { position: absolute; inset: 0; width: 100%; height: 100%; border: 0; }
.video-link { display: flex; align-items: center; justify-content: center; gap: 12px; color: #fff; text-decoration: none; font-weight: 650; background: radial-gradient(circle at 30% 30%, #5a3b2c, var(--soot)); }
.video-link:hover { color: #f0a36e; }
.play { width: 0; height: 0; border-left: 22px solid var(--ember); border-top: 14px solid transparent; border-bottom: 14px solid transparent; }
.tools { padding-left: 1.1em; }
.tools li { margin-bottom: .5em; }
@media (max-width: 860px) { .video-grid { grid-template-columns: 1fr; } }

.checklist { padding-left: 1.4em; display: grid; gap: 10px; }
.checklist li::marker { font-weight: 700; color: var(--ember); }
.label ul.tools { padding-left: 1.1em; }

.guide-links { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; margin-top: 24px; }
.guide-links a.card { text-decoration: none; color: var(--ink); transition: border-color .15s; }
.guide-links a.card:hover { border-color: var(--ember); }
.guide-links a.card p { color: var(--muted); margin: 0; }
@media (max-width: 860px) { .guide-links { grid-template-columns: 1fr; } }
.calc-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 20px; margin-top: 20px; }
.calc { display: grid; gap: 14px; align-content: start; }
.calc h3 { margin: 0; }
.calc label { font-weight: 600; font-size: .95rem; display: grid; gap: 6px; }
.calc label.check { display: flex; gap: 10px; align-items: flex-start; font-weight: 400; }
.calc label.check input { margin-top: 5px; }
.calc input[type=number] { font: inherit; padding: 10px 12px; border: 1px solid var(--line); border-radius: 10px; background: #fff; width: 100%; }
.row2 { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
.calc select { font: inherit; padding: 10px 12px; border: 1px solid var(--line); border-radius: 10px; background: #fff; width: 100%; }
.minor { font-size: .88rem; color: var(--muted); margin: 0; }
.calc-out { background: #fff4ec; border: 1px solid #f1cdb6; border-radius: 10px; padding: 14px 16px; margin: 0; font-variant-numeric: tabular-nums; }
.rules ul { padding-left: 1.1em; }
.table-wrap { overflow-x: auto; margin-top: 28px; }
.size-table { border-collapse: collapse; width: 100%; min-width: 560px; background: var(--card); border: 1px solid var(--line); border-radius: 12px; overflow: hidden; font-variant-numeric: tabular-nums; }
.size-table caption { text-align: left; font-weight: 700; padding: 0 0 10px; }
.size-table th, .size-table td { padding: 12px 14px; text-align: left; border-bottom: 1px solid var(--line); }
.size-table thead th { background: var(--stone); font-size: .9rem; }
.manuals { display: grid; grid-template-columns: repeat(2, 1fr); gap: 20px; margin-top: 24px; }
.manual dl { margin: 0 0 16px; display: grid; grid-template-columns: max-content 1fr; gap: 8px 14px; font-size: .94rem; flex: 1; }
.manual dt { font-weight: 700; color: var(--ink); }
.manual dd { margin: 0; color: var(--muted); min-width: 0; }
@media (max-width: 520px) { .manual dl { grid-template-columns: 1fr; } .manual dd { margin-bottom: 6px; } }
.manual { display: flex; flex-direction: column; }
.manual .doc { color: var(--muted); font-size: .95rem; }
.manual ul { padding-left: 1.1em; flex: 1; font-size: .95rem; }
.manual .btn { align-self: flex-start; }
@media (max-width: 860px) { .calc-grid, .manuals { grid-template-columns: 1fr; } }
@media (max-width: 420px) { .row2 { grid-template-columns: 1fr; } }