:root {
  --frost: #e8eef2;
  --acrylic: #f4f7f9;
  --led: #3aa8c5;
  --led-deep: #1a6f86;
  --graphite: #2a3338;
  --grease: #c9852a;
  --mylar: rgba(255, 255, 255, 0.55);
  --grid: rgba(26, 111, 134, 0.12);
  --ink: #1c2428;
  --muted: #5a676e;
  --font-display: "DM Serif Display", Georgia, serif;
  --font-body: "Atkinson Hyperlegible", "Segoe UI", sans-serif;
  --max: 70rem;
  --pad: clamp(1rem, 3vw, 2rem);
}

*,
*::before,
*::after { box-sizing: border-box; }

html { scroll-behavior: smooth; }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}

body {
  margin: 0;
  font-family: var(--font-body);
  font-size: 1.125rem;
  line-height: 1.65;
  color: var(--ink);
  background:
    radial-gradient(ellipse 80% 50% at 50% 0%, rgba(58, 168, 197, 0.18), transparent 55%),
    linear-gradient(180deg, #cfd9e0 0%, var(--frost) 22%, var(--acrylic) 70%, #dde5ea 100%);
  min-height: 100vh;
}

img { max-width: 100%; height: auto; }

a {
  color: var(--led-deep);
  text-decoration-thickness: 1px;
  text-underline-offset: 0.18em;
}
a:hover { color: var(--grease); }

.skip {
  position: absolute;
  left: -999px;
  top: 0;
  background: var(--graphite);
  color: var(--acrylic);
  padding: 0.5rem 1rem;
  z-index: 100;
}
.skip:focus { left: 0.5rem; top: 0.5rem; }

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

.mast {
  position: sticky;
  top: 0;
  z-index: 20;
  background: color-mix(in srgb, var(--acrylic) 88%, transparent);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid color-mix(in srgb, var(--led) 35%, transparent);
}
.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: 0.55rem;
  font-family: var(--font-display);
  font-size: 1.35rem;
  color: var(--graphite);
  text-decoration: none;
  letter-spacing: 0.01em;
}
.wordmark__lamp {
  width: 1.1rem;
  height: 1.1rem;
  border-radius: 2px;
  background:
    linear-gradient(135deg, var(--led) 0%, #9ad7e8 45%, var(--grease) 100%);
  box-shadow: 0 0 12px rgba(58, 168, 197, 0.55);
}
.nav {
  display: flex;
  gap: 1.15rem;
  flex-wrap: wrap;
}
.nav a {
  color: var(--muted);
  text-decoration: none;
  font-size: 0.95rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}
.nav a[aria-current="page"],
.nav a:hover { color: var(--led-deep); }

.hero {
  position: relative;
  overflow: hidden;
  padding: clamp(3rem, 8vw, 5.5rem) 0 clamp(2.5rem, 6vw, 4rem);
  isolation: isolate;
}
.hero__table {
  position: absolute;
  inset: 8% 6% auto;
  height: min(72%, 28rem);
  border-radius: 4px;
  background:
    linear-gradient(var(--grid) 1px, transparent 1px) 0 0 / 28px 28px,
    linear-gradient(90deg, var(--grid) 1px, transparent 1px) 0 0 / 28px 28px,
    linear-gradient(160deg, #f8fbfd 0%, #d7e8ef 48%, #c4d8e2 100%);
  box-shadow:
    inset 0 0 0 1px rgba(26, 111, 134, 0.2),
    0 24px 60px rgba(42, 51, 56, 0.18),
    0 0 40px rgba(58, 168, 197, 0.25);
  z-index: -2;
  animation: tableGlow 7s ease-in-out infinite alternate;
}
.hero__overlay {
  position: absolute;
  top: 14%;
  right: 12%;
  width: min(42%, 18rem);
  height: min(48%, 16rem);
  background: var(--mylar);
  border: 1px solid rgba(26, 111, 134, 0.25);
  transform: rotate(-4deg);
  z-index: -1;
  box-shadow: 0 8px 24px rgba(42, 51, 56, 0.08);
  animation: overlayDrift 9s ease-in-out infinite alternate;
}
.hero__overlay--2 {
  top: 28%;
  left: 10%;
  right: auto;
  width: min(34%, 14rem);
  height: min(36%, 12rem);
  transform: rotate(3deg);
  animation-delay: -3s;
}
@keyframes tableGlow {
  from { box-shadow: inset 0 0 0 1px rgba(26, 111, 134, 0.2), 0 24px 60px rgba(42, 51, 56, 0.18), 0 0 28px rgba(58, 168, 197, 0.18); }
  to { box-shadow: inset 0 0 0 1px rgba(26, 111, 134, 0.28), 0 28px 70px rgba(42, 51, 56, 0.22), 0 0 52px rgba(58, 168, 197, 0.38); }
}
@keyframes overlayDrift {
  from { transform: rotate(-4deg) translateY(0); }
  to { transform: rotate(-2deg) translateY(6px); }
}
.hero__content { position: relative; max-width: 42rem; }
.hero__brand {
  margin: 0 0 0.75rem;
  font-family: var(--font-display);
  font-size: clamp(2.4rem, 6vw, 3.6rem);
  line-height: 1.05;
  color: var(--graphite);
}
.hero h1 {
  margin: 0 0 1rem;
  font-family: var(--font-body);
  font-weight: 700;
  font-size: clamp(1.2rem, 2.4vw, 1.55rem);
  line-height: 1.35;
  color: var(--ink);
}
.hero__stand {
  margin: 0 0 1.25rem;
  color: var(--muted);
  max-width: 36rem;
}
.hero__stamp {
  display: inline-block;
  margin: 0;
  padding: 0.35rem 0.7rem;
  font-size: 0.8rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--graphite);
  border: 1px dashed var(--grease);
  background: rgba(255, 255, 255, 0.45);
}

.panel { padding: clamp(2rem, 5vw, 3.5rem) 0; }
.panel--glass {
  background: color-mix(in srgb, #fff 55%, transparent);
  border-block: 1px solid rgba(26, 111, 134, 0.12);
}
.eyebrow {
  margin: 0 0 0.4rem;
  font-size: 0.78rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--grease);
}
.panel h2 {
  margin: 0 0 1.25rem;
  font-family: var(--font-display);
  font-size: clamp(1.7rem, 3vw, 2.2rem);
  font-weight: 400;
  color: var(--graphite);
}
.lede p { margin: 0 0 0.9rem; max-width: 48rem; }

.library { display: grid; gap: 1.25rem; }
.entry {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 1rem 1.25rem;
  padding: 1.15rem 1.25rem;
  background: rgba(255, 255, 255, 0.62);
  border: 1px solid rgba(26, 111, 134, 0.16);
  box-shadow: 0 10px 28px rgba(42, 51, 56, 0.06);
  transition: transform 0.25s ease, box-shadow 0.25s ease;
}
.entry:hover {
  transform: translateY(-2px);
  box-shadow: 0 14px 32px rgba(42, 51, 56, 0.1);
}
.entry__id {
  margin: 0;
  font-size: 0.75rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--led-deep);
  writing-mode: vertical-rl;
  transform: rotate(180deg);
  border-right: 2px solid var(--led);
  padding-right: 0.55rem;
}
.entry h3 {
  margin: 0 0 0.4rem;
  font-family: var(--font-display);
  font-size: 1.35rem;
  font-weight: 400;
  line-height: 1.25;
}
.entry h3 a { color: var(--graphite); text-decoration: none; }
.entry h3 a:hover { color: var(--led-deep); }
.entry p { margin: 0; color: var(--muted); font-size: 1rem; }

.standards {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 0.9rem;
}
.standards li {
  padding: 0.9rem 1rem;
  background: rgba(255, 255, 255, 0.5);
  border-left: 3px solid var(--led);
}
.not-list {
  margin: 0;
  padding-left: 1.2rem;
  max-width: 48rem;
}
.not-list li { margin-bottom: 0.55rem; }

.faq { display: grid; gap: 1rem; max-width: 48rem; }
.faq details {
  padding: 0.85rem 1rem;
  background: rgba(255, 255, 255, 0.55);
  border: 1px solid rgba(26, 111, 134, 0.14);
}
.faq summary {
  cursor: pointer;
  font-weight: 700;
  color: var(--graphite);
}
.faq p { margin: 0.65rem 0 0; color: var(--muted); }

.support-box {
  max-width: 40rem;
  padding: 1.25rem 1.4rem;
  border: 1px solid rgba(201, 133, 42, 0.45);
  background:
    linear-gradient(135deg, rgba(58, 168, 197, 0.08), transparent 55%),
    rgba(255, 255, 255, 0.65);
}
.support-box p { margin: 0 0 0.5rem; }

.page-hero {
  padding: clamp(2.2rem, 5vw, 3.5rem) 0 1.5rem;
}
.page-hero h1 {
  margin: 0.35rem 0 0.75rem;
  font-family: var(--font-display);
  font-size: clamp(2rem, 4vw, 2.8rem);
  font-weight: 400;
  color: var(--graphite);
}
.prose { max-width: 44rem; }
.prose h2 {
  margin: 2rem 0 0.75rem;
  font-family: var(--font-display);
  font-size: 1.55rem;
  font-weight: 400;
}
.prose p, .prose li { color: var(--ink); }
.prose ul { padding-left: 1.2rem; }

.article-meta {
  margin: 0 0 1.5rem;
  font-size: 0.9rem;
  color: var(--muted);
  letter-spacing: 0.04em;
}

.foot {
  margin-top: 2rem;
  padding: 2rem 0 2.5rem;
  border-top: 1px solid rgba(26, 111, 134, 0.18);
  color: var(--muted);
  font-size: 0.95rem;
}
.foot__row {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem 1.5rem;
  justify-content: space-between;
  align-items: flex-start;
}
.foot nav { display: flex; flex-wrap: wrap; gap: 0.85rem 1.1rem; }
.foot a { color: var(--muted); text-decoration: none; }
.foot a:hover { color: var(--led-deep); }

@media (max-width: 720px) {
  .entry { grid-template-columns: 1fr; }
  .entry__id {
    writing-mode: horizontal-tb;
    transform: none;
    border-right: 0;
    border-bottom: 2px solid var(--led);
    padding: 0 0 0.35rem;
    width: fit-content;
  }
  .hero__overlay { display: none; }
}