/* Loomcard — Punch-Card Loom editorial
   Manila card stock, machine charcoal, amber lamp, indigo warp thread.
   IBM Plex Mono + Source Serif 4. Distinct from FIDS, galley tray, chalk, mullion. */

:root {
  color-scheme: light;
  --manila: #E8D9B8;
  --manila-deep: #D4C19A;
  --charcoal: #2A241C;
  --ink: #1F1A14;
  --ink-soft: #5A5246;
  --amber: #C47A2A;
  --amber-lamp: #E8A04A;
  --indigo: #2F3F6B;
  --indigo-soft: #4A5F8C;
  --hole: #1A1612;
  --card: #F3E8CF;
  --rail: #B8A888;
  --mono: "IBM Plex Mono", ui-monospace, monospace;
  --serif: "Source Serif 4", "Georgia", serif;
  --shell: min(1080px, calc(100% - 2.25rem));
  --ease: cubic-bezier(0.2, 0.85, 0.25, 1);
}

*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: var(--serif);
  font-size: 1.08rem;
  line-height: 1.7;
  color: var(--ink);
  background:
    radial-gradient(ellipse 80% 50% at 10% 0%, rgba(196, 122, 42, 0.12), transparent 55%),
    repeating-linear-gradient(
      90deg,
      transparent 0,
      transparent 11px,
      rgba(47, 63, 107, 0.045) 11px,
      rgba(47, 63, 107, 0.045) 12px
    ),
    linear-gradient(180deg, var(--manila) 0%, var(--manila-deep) 100%);
  min-height: 100vh;
}
img { max-width: 100%; height: auto; }
a { color: var(--indigo); text-decoration-thickness: 1px; text-underline-offset: 0.18em; }
a:hover { color: var(--amber); }
.skip {
  position: absolute; left: -999px; top: 0;
  background: var(--indigo); color: var(--card); padding: 0.5rem 1rem; z-index: 20;
}
.skip:focus { left: 0.5rem; top: 0.5rem; }
.shell { width: var(--shell); margin-inline: auto; }

.top {
  border-bottom: 1px solid var(--rail);
  background: rgba(243, 232, 207, 0.92);
  backdrop-filter: blur(6px);
  position: sticky; top: 0; z-index: 10;
}
.top__row {
  display: flex; align-items: baseline; justify-content: space-between;
  gap: 1rem; padding: 0.9rem 0 0.4rem;
}
.brand {
  font-family: var(--mono);
  font-weight: 600;
  font-size: clamp(1.15rem, 2.5vw, 1.35rem);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--charcoal);
  text-decoration: none;
  display: inline-flex; align-items: center; gap: 0.55rem;
}
.brand__mark {
  width: 1.35rem; height: 0.95rem;
  background:
    radial-gradient(circle at 20% 50%, var(--hole) 0 2px, transparent 2.5px),
    radial-gradient(circle at 40% 50%, var(--hole) 0 2px, transparent 2.5px),
    radial-gradient(circle at 60% 50%, var(--hole) 0 2px, transparent 2.5px),
    radial-gradient(circle at 80% 50%, var(--hole) 0 2px, transparent 2.5px),
    var(--manila-deep);
  border: 1px solid var(--charcoal);
  box-shadow: inset 0 0 0 1px rgba(255,255,255,0.35);
}
.top__meta {
  font-family: var(--mono);
  font-size: 0.7rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--ink-soft);
}
.nav {
  display: flex; gap: 1.25rem; padding: 0.35rem 0 0.85rem;
  font-family: var(--mono); font-size: 0.75rem; letter-spacing: 0.1em;
  text-transform: uppercase;
}
.nav a { color: var(--ink-soft); text-decoration: none; }
.nav a[aria-current="page"], .nav a:hover { color: var(--indigo); }

.hero {
  position: relative;
  padding: clamp(2.75rem, 8vw, 5rem) 0 clamp(2.25rem, 5vw, 3.5rem);
  overflow: hidden;
  border-bottom: 1px solid var(--rail);
}
.hero__loom {
  position: absolute; inset: 0;
  background:
    linear-gradient(105deg, rgba(232, 217, 184, 0.2), transparent 45%),
    repeating-linear-gradient(
      0deg,
      transparent 0 14px,
      rgba(42, 36, 28, 0.06) 14px 15px
    );
  pointer-events: none;
}
.punch {
  position: absolute;
  right: clamp(0.5rem, 4vw, 3rem);
  top: 18%;
  width: min(280px, 38vw);
  aspect-ratio: 1.6 / 1;
  background: var(--card);
  border: 2px solid var(--charcoal);
  box-shadow:
    6px 8px 0 rgba(42, 36, 28, 0.18),
    inset 0 0 0 1px rgba(255,255,255,0.4);
  display: grid;
  grid-template-columns: repeat(12, 1fr);
  grid-template-rows: repeat(6, 1fr);
  gap: 4px;
  padding: 12px 14px 10px;
  transform: rotate(-3deg);
  animation: cardIn 1.1s var(--ease) both;
  pointer-events: none;
}
.punch span {
  border-radius: 50%;
  background: transparent;
}
.punch span.on {
  background: var(--hole);
  box-shadow: inset 0 1px 2px rgba(0,0,0,0.45);
  animation: punchPop 0.55s var(--ease) both;
}
.punch span.on:nth-child(3n) { animation-delay: 0.08s; }
.punch span.on:nth-child(5n) { animation-delay: 0.16s; }
.punch span.on:nth-child(7n) { animation-delay: 0.24s; }
@keyframes cardIn {
  from { opacity: 0; transform: rotate(-8deg) translateY(18px); }
  to { opacity: 1; transform: rotate(-3deg) translateY(0); }
}
@keyframes punchPop {
  from { transform: scale(0); }
  to { transform: scale(1); }
}
.hero__content { position: relative; z-index: 1; max-width: 36rem; }
.hero__brand {
  font-family: var(--mono);
  font-size: clamp(2.4rem, 8vw, 4.2rem);
  font-weight: 600;
  line-height: 0.95;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--charcoal);
  margin: 0 0 0.9rem;
  animation: brandSlide 0.9s var(--ease) both;
}
@keyframes brandSlide {
  from { opacity: 0; transform: translateX(-12px); }
  to { opacity: 1; transform: none; }
}
.hero h1 {
  font-family: var(--serif);
  font-weight: 600;
  font-size: clamp(1.2rem, 2.6vw, 1.55rem);
  line-height: 1.4;
  color: var(--ink);
  margin: 0 0 0.85rem;
  max-width: 34rem;
}
.hero__stand {
  margin: 0;
  color: var(--ink-soft);
  font-size: 1.05rem;
  max-width: 32rem;
  font-style: italic;
}

.block { padding: clamp(2rem, 5vw, 3.25rem) 0; }
.block--card {
  background: rgba(243, 232, 207, 0.55);
  border-block: 1px solid var(--rail);
}
.eyebrow {
  font-family: var(--mono);
  font-size: 0.7rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--amber);
  margin: 0 0 0.55rem;
}
h2 {
  font-family: var(--mono);
  font-size: clamp(1.15rem, 2.4vw, 1.45rem);
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  margin: 0 0 1rem;
  color: var(--charcoal);
}
.lede { display: grid; gap: 0.85rem; max-width: 42rem; }
.lede p { margin: 0; color: var(--ink-soft); }

.library { display: grid; gap: 0.9rem; margin-top: 1.35rem; }
.entry {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 1rem 1.25rem;
  padding: 1.05rem 1.15rem;
  background: var(--card);
  border: 1px solid var(--rail);
  border-left: 4px solid var(--indigo);
  box-shadow: 3px 3px 0 rgba(42, 36, 28, 0.08);
  transition: transform 0.25s var(--ease), border-color 0.25s var(--ease);
}
.entry:hover {
  transform: translateX(4px);
  border-left-color: var(--amber);
}
.entry__id {
  font-family: var(--mono);
  font-size: 0.68rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--indigo);
  margin: 0.2rem 0 0;
  white-space: nowrap;
}
.entry h3 {
  font-family: var(--serif);
  font-size: 1.2rem;
  font-weight: 600;
  margin: 0 0 0.35rem;
  line-height: 1.3;
}
.entry h3 a { color: var(--ink); text-decoration: none; }
.entry h3 a:hover { color: var(--amber); }
.entry p { margin: 0; color: var(--ink-soft); font-size: 0.98rem; }

.standards, .not-list, .faq {
  display: grid; gap: 0.85rem; margin-top: 1rem; max-width: 44rem;
}
.standards article, .faq details, .not-list li {
  background: var(--card);
  border: 1px solid var(--rail);
  padding: 0.9rem 1.05rem;
}
.standards h3, .faq summary {
  font-family: var(--mono);
  font-size: 0.82rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  margin: 0 0 0.4rem;
  color: var(--indigo);
}
.standards p, .faq p, .not-list { margin: 0; color: var(--ink-soft); }
.not-list { padding-left: 1.2rem; }
.faq details { cursor: pointer; }
.faq summary { list-style: none; }
.faq summary::-webkit-details-marker { display: none; }

.article__head { padding: clamp(2rem, 5vw, 3rem) 0 0.5rem; border-bottom: 1px solid var(--rail); }
.article__head h1 {
  font-family: var(--serif);
  font-size: clamp(1.75rem, 4vw, 2.55rem);
  font-weight: 600;
  line-height: 1.15;
  margin: 0 0 0.75rem;
  color: var(--charcoal);
}
.article__meta {
  font-family: var(--mono);
  font-size: 0.75rem;
  color: var(--ink-soft);
  letter-spacing: 0.04em;
  display: grid; gap: 0.25rem;
}
.prose { max-width: 42rem; }
.prose p, .prose li { color: var(--ink-soft); }
.prose h2 {
  margin-top: 2rem;
  font-size: 1.05rem;
}
.prose ul { padding-left: 1.15rem; }
.mail { font-family: var(--mono); }

.foot {
  margin-top: 2rem;
  border-top: 1px solid var(--rail);
  padding: 1.5rem 0 2.25rem;
  font-size: 0.92rem;
  color: var(--ink-soft);
  background: rgba(42, 36, 28, 0.04);
}
.foot__grid {
  display: flex; flex-wrap: wrap; gap: 0.75rem 1.25rem;
  margin-bottom: 1rem;
  font-family: var(--mono);
  font-size: 0.7rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}
.foot__grid a { color: var(--ink-soft); text-decoration: none; }
.foot__grid a:hover { color: var(--indigo); }
.foot p { margin: 0.35rem 0; max-width: 40rem; }

@media (max-width: 820px) {
  .punch { display: none; }
}
@media (max-width: 720px) {
  .top__row { flex-direction: column; align-items: flex-start; }
  .entry { grid-template-columns: 1fr; gap: 0.35rem; }
}
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation: none !important;
    transition: none !important;
  }
}