/* Zinc Plate — Stencil Plate Editorial
   Industrial letter/number stencil plates on a shop peg rail.
   Distinct from flapindex (split-flap) and framemark (film leader). */

:root {
  color-scheme: light;

  --zinc: #8B9399;
  --zinc-deep: #5C646B;
  --zinc-light: #B8C0C6;
  --floor: #2A2E32;
  --floor-2: #1C1F22;
  --chalk: #F4F5F0;
  --chalk-2: #E8EAE3;
  --safety: #E85D04;
  --safety-dim: #C24E03;
  --rivet: #121416;
  --ink: #1A1D21;
  --muted: #5A6168;
  --line: #C5CAC2;

  --display: "Geologica", "Arial Narrow", sans-serif;
  --text: "Noto Serif", Georgia, serif;
  --mono: "Fira Mono", "Consolas", monospace;

  --shell: 70rem;
  --gutter: clamp(1.1rem, 4vw, 2.75rem);
}

*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: var(--text);
  font-size: 1.05rem;
  line-height: 1.65;
  color: var(--ink);
  background:
    radial-gradient(ellipse 80% 50% at 10% 0%, rgba(232, 93, 4, 0.06), transparent 55%),
    linear-gradient(180deg, var(--chalk) 0%, var(--chalk-2) 100%);
  min-height: 100vh;
}

img { max-width: 100%; height: auto; }
a { color: var(--safety-dim); text-underline-offset: 0.15em; }
a:hover { color: var(--safety); }
.skip {
  position: absolute; left: -999px; top: 0;
  background: var(--floor); color: var(--chalk); padding: 0.5rem 1rem; z-index: 99;
}
.skip:focus { left: var(--gutter); top: 0.5rem; }

.shell {
  width: min(100% - 2 * var(--gutter), var(--shell));
  margin-inline: auto;
}

/* Mast */
.mast {
  position: sticky; top: 0; z-index: 40;
  background: rgba(244, 245, 240, 0.92);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--line);
}
.mast__row {
  display: flex; align-items: center; justify-content: space-between;
  gap: 1rem; padding: 0.85rem 0;
}
.wordmark {
  display: inline-flex; align-items: center; gap: 0.65rem;
  text-decoration: none; color: var(--rivet);
  font-family: var(--display); font-weight: 600; letter-spacing: 0.04em;
  text-transform: uppercase; font-size: 0.95rem;
}
.wordmark__plate {
  width: 1.65rem; height: 1.35rem;
  background: var(--zinc);
  border: 2px solid var(--rivet);
  box-shadow: inset 0 0 0 2px var(--chalk-2);
  position: relative;
  clip-path: polygon(0 0, 100% 0, 100% 100%, 0 100%);
}
.wordmark__plate::before,
.wordmark__plate::after {
  content: ""; position: absolute; width: 4px; height: 4px; border-radius: 50%;
  background: var(--rivet); top: 3px;
}
.wordmark__plate::before { left: 3px; }
.wordmark__plate::after { right: 3px; }
.nav { display: flex; gap: 1.25rem; font-family: var(--mono); font-size: 0.78rem; text-transform: uppercase; letter-spacing: 0.06em; }
.nav a { text-decoration: none; color: var(--muted); }
.nav a[aria-current="page"], .nav a:hover { color: var(--rivet); }

/* Hero — stencil rack */
.hero {
  position: relative;
  overflow: hidden;
  min-height: min(88vh, 42rem);
  display: grid;
  align-items: end;
  background:
    linear-gradient(105deg, var(--floor-2) 0%, var(--floor) 48%, #353b40 100%);
  color: var(--chalk);
  isolation: isolate;
}
.hero__rail {
  position: absolute; inset: 12% 0 auto; height: 0.35rem;
  background: linear-gradient(90deg, transparent, var(--zinc), transparent);
  opacity: 0.55; z-index: 0;
}
.hero__plates {
  position: absolute; inset: 0; z-index: 0;
  display: flex; justify-content: center; align-items: center; gap: clamp(0.4rem, 2vw, 1.1rem);
  padding-top: 4rem; pointer-events: none;
  animation: sway 9s ease-in-out infinite;
}
@keyframes sway {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(6px); }
}
.plate {
  width: clamp(2.4rem, 6vw, 3.6rem);
  height: clamp(3.2rem, 8vw, 4.8rem);
  background: linear-gradient(160deg, var(--zinc-light), var(--zinc) 40%, var(--zinc-deep));
  border: 2px solid #3a4046;
  box-shadow:
    0 10px 18px rgba(0,0,0,0.35),
    inset 0 1px 0 rgba(255,255,255,0.25);
  position: relative;
  display: grid; place-items: center;
  font-family: var(--display); font-weight: 700;
  font-size: clamp(1.4rem, 4vw, 2.1rem);
  color: var(--floor-2);
  letter-spacing: -0.04em;
  clip-path: polygon(8% 0, 92% 0, 100% 8%, 100% 92%, 92% 100%, 8% 100%, 0 92%, 0 8%);
}
.plate::before, .plate::after {
  content: ""; position: absolute; top: 0.35rem; width: 0.35rem; height: 0.35rem;
  border-radius: 50%; background: var(--rivet); box-shadow: 0 0 0 1px #6a7278;
}
.plate::before { left: 0.35rem; }
.plate::after { right: 0.35rem; }
.plate--safety { background: linear-gradient(160deg, #ff8a3d, var(--safety) 45%, var(--safety-dim)); color: var(--chalk); }
.plate:nth-child(2) { transform: translateY(10px) rotate(-2deg); }
.plate:nth-child(3) { transform: translateY(-6px) rotate(1.5deg); }
.plate:nth-child(4) { transform: translateY(14px) rotate(-1deg); }
.plate:nth-child(5) { transform: translateY(2px) rotate(2deg); }
.plate:nth-child(6) { transform: translateY(8px) rotate(-1.5deg); }

.hero__content {
  position: relative; z-index: 1;
  padding: clamp(2rem, 6vw, 4rem) 0 clamp(2.5rem, 7vw, 4.5rem);
  max-width: 42rem;
}
.hero__brand {
  margin: 0 0 0.75rem;
  font-family: var(--display); font-weight: 600;
  letter-spacing: 0.14em; text-transform: uppercase;
  font-size: 0.85rem; color: var(--safety);
}
.hero h1 {
  margin: 0 0 1rem;
  font-family: var(--display); font-weight: 600;
  font-size: clamp(1.55rem, 3.8vw, 2.35rem);
  line-height: 1.15; letter-spacing: -0.02em;
  color: var(--chalk);
}
.hero__stand {
  margin: 0 0 1.25rem;
  font-size: 1.05rem; color: rgba(244,245,240,0.82); max-width: 36rem;
}
.hero__stamp {
  display: inline-block;
  margin: 0;
  font-family: var(--mono); font-size: 0.72rem;
  letter-spacing: 0.08em; text-transform: uppercase;
  color: var(--zinc-light);
  border: 1px dashed var(--zinc); padding: 0.35rem 0.7rem;
}

/* Panels */
.panel { padding: clamp(2.5rem, 6vw, 4.5rem) 0; }
.panel--rack {
  background:
    repeating-linear-gradient(90deg, transparent, transparent 47px, rgba(139,147,153,0.12) 47px, rgba(139,147,153,0.12) 48px),
    var(--chalk-2);
  border-block: 1px solid var(--line);
}
.eyebrow {
  margin: 0 0 0.4rem;
  font-family: var(--mono); font-size: 0.72rem;
  letter-spacing: 0.12em; text-transform: uppercase; color: var(--safety-dim);
}
.panel h2 {
  margin: 0 0 1.25rem;
  font-family: var(--display); font-weight: 600;
  font-size: clamp(1.4rem, 2.8vw, 1.9rem); letter-spacing: -0.02em;
}
.lede p { max-width: 40rem; color: var(--muted); }
.lede p + p { margin-top: 0.85rem; }

.library { display: grid; gap: 1rem; }
.entry {
  display: grid; grid-template-columns: auto 1fr; gap: 1.25rem;
  align-items: start;
  padding: 1.25rem 1.35rem;
  background: var(--chalk);
  border: 1px solid var(--line);
  box-shadow: 3px 3px 0 rgba(42, 46, 50, 0.08);
  transition: transform 0.25s ease, box-shadow 0.25s ease;
}
.entry:hover {
  transform: translate(-2px, -2px);
  box-shadow: 5px 5px 0 rgba(232, 93, 4, 0.18);
}
.entry__id {
  margin: 0;
  font-family: var(--mono); font-size: 0.7rem;
  letter-spacing: 0.06em; text-transform: uppercase;
  color: var(--floor); background: var(--zinc); padding: 0.35rem 0.5rem;
  border: 1px solid var(--rivet);
}
.entry h3 { margin: 0 0 0.4rem; font-family: var(--display); font-size: 1.15rem; font-weight: 600; }
.entry h3 a { text-decoration: none; color: var(--rivet); }
.entry h3 a:hover { color: var(--safety); }
.entry p { margin: 0; color: var(--muted); font-size: 0.98rem; }

.standards {
  display: grid; gap: 1rem;
  grid-template-columns: repeat(auto-fit, minmax(14rem, 1fr));
}
.standard {
  padding: 1.1rem 1.2rem;
  border-left: 3px solid var(--safety);
  background: rgba(255,255,255,0.55);
}
.standard h3 {
  margin: 0 0 0.45rem;
  font-family: var(--display); font-size: 1rem; font-weight: 600;
}
.standard p { margin: 0; font-size: 0.95rem; color: var(--muted); }

.not-list {
  list-style: none; margin: 0; padding: 0;
  display: grid; gap: 0.65rem;
}
.not-list li {
  padding: 0.85rem 1rem 0.85rem 2.5rem;
  background: var(--floor); color: var(--chalk);
  position: relative; font-size: 0.95rem;
}
.not-list li::before {
  content: "∅";
  position: absolute; left: 0.9rem; top: 0.85rem;
  font-family: var(--mono); color: var(--safety);
}

.faq details {
  border-bottom: 1px solid var(--line);
  padding: 0.9rem 0;
}
.faq summary {
  cursor: pointer;
  font-family: var(--display); font-weight: 600;
  list-style: none;
}
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after {
  content: "+"; float: right; font-family: var(--mono); color: var(--safety);
}
.faq details[open] summary::after { content: "−"; }
.faq details p { margin: 0.65rem 0 0; color: var(--muted); max-width: 40rem; }

.support {
  display: flex; flex-wrap: wrap; gap: 1rem; align-items: center;
  padding: 1.25rem 1.4rem;
  border: 2px solid var(--floor);
  background:
    repeating-linear-gradient(-45deg, transparent, transparent 6px, rgba(232,93,4,0.07) 6px, rgba(232,93,4,0.07) 7px),
    var(--chalk);
}
.support a { font-family: var(--mono); font-size: 0.9rem; }

/* Article / prose */
.article__head { padding: clamp(2rem, 5vw, 3.5rem) 0 0; }
.article__head h1 {
  margin: 0 0 0.75rem;
  font-family: var(--display); font-weight: 600;
  font-size: clamp(1.5rem, 3.2vw, 2.2rem); line-height: 1.2;
}
.article__meta {
  margin: 0; font-family: var(--mono); font-size: 0.75rem;
  letter-spacing: 0.04em; text-transform: uppercase; color: var(--muted);
}
.prose { max-width: 42rem; }
.prose h2 {
  margin: 2rem 0 0.75rem;
  font-family: var(--display); font-size: 1.25rem; font-weight: 600;
}
.prose p, .prose li { color: var(--ink); }
.prose ul { padding-left: 1.2rem; }
.backlink {
  display: inline-block; margin-top: 2rem;
  font-family: var(--mono); font-size: 0.8rem; text-transform: uppercase;
  letter-spacing: 0.06em; text-decoration: none;
  border-bottom: 1px solid var(--safety);
}

/* Legal shared */
.page-head {
  padding: clamp(2rem, 5vw, 3.25rem) 0 0;
}
.page-head h1 {
  margin: 0 0 0.5rem;
  font-family: var(--display); font-weight: 600;
  font-size: clamp(1.6rem, 3vw, 2.1rem);
}
.page-head p { margin: 0; color: var(--muted); max-width: 38rem; }

/* Footer */
.colophon {
  margin-top: 2rem;
  padding: 2rem 0 2.5rem;
  background: var(--floor-2); color: rgba(244,245,240,0.75);
  font-size: 0.9rem;
}
.colophon a { color: var(--zinc-light); }
.colophon__row {
  display: flex; flex-wrap: wrap; gap: 1rem 2rem;
  justify-content: space-between; align-items: flex-start;
}
.colophon nav { display: flex; flex-wrap: wrap; gap: 0.85rem 1.25rem; font-family: var(--mono); font-size: 0.72rem; text-transform: uppercase; letter-spacing: 0.05em; }
.colophon p { margin: 0.75rem 0 0; max-width: 36rem; }

@media (max-width: 640px) {
  .hero__plates { opacity: 0.35; }
  .entry { grid-template-columns: 1fr; }
  .nav { gap: 0.75rem; font-size: 0.7rem; }
}