:root {
  --bit: #1C1C1C;
  --copper: #B87333;
  --copper-deep: #8F5A28;
  --chip: #D4A017;
  --bench: #3D4A3A;
  --bench-soft: #4A5A46;
  --paper: #EEF0EA;
  --paper-deep: #E2E5DC;
  --ink: #141816;
  --muted: #3A423C;
  --line: #C5CABE;
  --mist: #F4F6F0;
  --display: "Saira Extra Condensed", "Arial Narrow", sans-serif;
  --body: "Newsreader", Georgia, serif;
  --mono: "Share Tech Mono", ui-monospace, monospace;
  --wrap: min(1120px, calc(100% - 2.5rem));
  --narrow: min(720px, calc(100% - 2.5rem));
}

*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  color: var(--ink);
  background:
    radial-gradient(ellipse 70% 45% at 88% 8%, rgba(184, 115, 51, 0.14), transparent 55%),
    radial-gradient(ellipse 50% 40% at 8% 70%, rgba(61, 74, 58, 0.12), transparent 50%),
    linear-gradient(168deg, var(--paper) 0%, var(--mist) 42%, var(--paper-deep) 100%);
  font-family: var(--body);
  font-size: 1.0625rem;
  line-height: 1.68;
  min-height: 100vh;
}
img, svg { max-width: 100%; height: auto; display: block; }
a { color: var(--copper-deep); text-underline-offset: 0.18em; }
a:hover { color: var(--bench); }
:focus-visible { outline: 2px solid var(--copper); outline-offset: 3px; }

.skip {
  position: absolute; left: -9999px; top: 0;
  background: var(--bit); color: var(--chip); padding: 0.6rem 1rem; z-index: 100;
}
.skip:focus { left: 0.75rem; top: 0.75rem; }

.wrap { width: var(--wrap); margin-inline: auto; }
.narrow { width: var(--narrow); margin-inline: auto; }

.top {
  position: sticky; top: 0; z-index: 20;
  backdrop-filter: blur(11px);
  background: color-mix(in srgb, var(--paper) 86%, transparent);
  border-bottom: 1px solid var(--line);
}
.top__row {
  display: flex; align-items: center; justify-content: space-between;
  gap: 1rem; padding: 0.85rem 0;
}
.brand {
  display: inline-flex; align-items: center; gap: 0.65rem;
  text-decoration: none; color: var(--bit);
  font-family: var(--display); font-weight: 700;
  font-size: 1.7rem; letter-spacing: 0.04em; text-transform: uppercase; line-height: 1;
}
.brand__mark { width: 1.75rem; height: 1.75rem; flex-shrink: 0; }
.nav { display: flex; gap: 1.25rem; flex-wrap: wrap; }
.nav a {
  font-family: var(--mono); font-size: 0.8rem; letter-spacing: 0.06em;
  text-transform: uppercase; text-decoration: none; color: var(--bench);
}
.nav a:hover { color: var(--copper-deep); }

.hero {
  position: relative; overflow: hidden;
  padding: 3.75rem 0 3.25rem;
  border-bottom: 1px solid var(--line);
  background:
    linear-gradient(105deg, rgba(28, 28, 28, 0.04) 0%, transparent 38%),
    linear-gradient(180deg, transparent 70%, rgba(61, 74, 58, 0.08));
}
.hero::before {
  content: ""; position: absolute; inset: 0; pointer-events: none;
  background:
    repeating-linear-gradient(
      0deg,
      transparent,
      transparent 38px,
      rgba(61, 74, 58, 0.06) 38px,
      rgba(61, 74, 58, 0.06) 39px
    ),
    radial-gradient(circle at 76% 48%, rgba(212, 160, 23, 0.12), transparent 38%);
}
.hero__grid {
  position: relative;
  display: grid; grid-template-columns: 1.05fr 0.95fr;
  gap: 2.5rem; align-items: center;
}
.auger-label {
  margin: 0 0 0.75rem;
  font-family: var(--mono); font-size: 0.78rem;
  letter-spacing: 0.14em; text-transform: uppercase; color: var(--copper);
}
.hero h1 {
  margin: 0 0 1rem;
  font-family: var(--display); font-weight: 700;
  font-size: clamp(3rem, 7vw, 5rem); line-height: 0.92;
  letter-spacing: 0.02em; text-transform: uppercase; color: var(--bit);
  max-width: 10ch;
}
.hero__lead {
  margin: 0 0 1.6rem; color: var(--muted);
  max-width: 40ch; font-size: 1.12rem; font-weight: 400;
}
.hero__art { margin: 0; position: relative; }
.hero__art svg {
  width: 100%;
  border: 1px solid var(--line);
  background:
    linear-gradient(160deg, #E8EBE3 0%, #F2F4EE 48%, #D8DDD2 100%);
}
.auger-spin {
  transform-origin: 200px 168px;
  animation: augerSpin 22s linear infinite;
}
@keyframes augerSpin {
  from { transform: rotate(0deg); }
  to { transform: rotate(360deg); }
}
.chip-drift {
  animation: chipDrift 7s ease-in-out infinite alternate;
}
.chip-drift--b { animation-delay: -2.4s; animation-duration: 9s; }
.chip-drift--c { animation-delay: -4.1s; animation-duration: 8s; }
@keyframes chipDrift {
  from { transform: translate(0, 0); opacity: 0.85; }
  to { transform: translate(10px, -14px); opacity: 1; }
}

.btn {
  display: inline-block; padding: 0.72rem 1.2rem;
  background: var(--bit); color: var(--paper);
  text-decoration: none; font-family: var(--mono); font-size: 0.78rem;
  letter-spacing: 0.07em; text-transform: uppercase;
  border: 1px solid var(--bit);
  transition: background 0.2s, color 0.2s, border-color 0.2s;
}
.btn:hover { background: var(--copper); border-color: var(--copper); color: var(--bit); }
.btn--ghost {
  background: transparent; color: var(--bit); border-color: var(--bench);
  margin-left: 0.5rem;
}
.btn--ghost:hover {
  background: var(--mist); border-color: var(--copper); color: var(--copper-deep);
}

.band {
  padding: 2.85rem 0;
  background:
    linear-gradient(90deg, rgba(184, 115, 51, 0.08), transparent 45%),
    var(--mist);
  border-bottom: 1px solid var(--line);
}
.flute {
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 1.6rem;
}
.flute__step {
  position: relative;
  padding: 0.2rem 0 0.2rem 1.05rem;
  border-left: 3px solid var(--copper);
}
.flute__step h3 {
  margin: 0 0 0.4rem;
  font-family: var(--display); font-size: 1.55rem;
  text-transform: uppercase; letter-spacing: 0.04em; color: var(--bit);
}
.flute__step p { margin: 0; color: var(--muted); font-size: 0.98rem; }
.flute__n {
  font-family: var(--mono); font-size: 0.72rem;
  color: var(--bench); letter-spacing: 0.1em; margin-bottom: 0.35rem;
}

.section { padding: 3rem 0; }
.section h2 {
  margin: 0 0 1.25rem;
  font-family: var(--display);
  font-size: clamp(2rem, 3.4vw, 2.7rem);
  text-transform: uppercase; letter-spacing: 0.04em; color: var(--bit);
}

.library { display: grid; gap: 0; }
.bore {
  display: grid; grid-template-columns: 5rem 1fr; gap: 1.25rem;
  padding: 1.4rem 0; border-top: 1px solid var(--line);
}
.bore:last-child { border-bottom: 1px solid var(--line); }
.bore__n {
  font-family: var(--mono); font-size: 0.85rem;
  color: var(--copper-deep); padding-top: 0.4rem;
}
.bore h3 {
  margin: 0 0 0.4rem;
  font-family: var(--display); font-size: 1.55rem;
  text-transform: uppercase; letter-spacing: 0.03em;
}
.bore h3 a { text-decoration: none; color: var(--bit); }
.bore h3 a:hover { color: var(--copper-deep); }
.bore p { margin: 0 0 0.55rem; color: var(--muted); }
.bore__more {
  font-family: var(--mono); font-size: 0.75rem;
  letter-spacing: 0.07em; text-transform: uppercase;
  text-decoration: none; color: var(--bench);
}

.standards { margin: 0; padding: 0; list-style: none; display: grid; gap: 0.85rem; }
.standards li {
  padding: 0.95rem 1.05rem;
  border-left: 3px solid var(--bench);
  background: color-mix(in srgb, var(--paper) 55%, white);
}

.not-list { margin: 0; padding-left: 1.15rem; color: var(--muted); }
.not-list li { margin-bottom: 0.45rem; }

.faq { display: grid; gap: 0.85rem; }
.faq details {
  border: 1px solid var(--line);
  background: var(--paper);
  padding: 0.9rem 1.05rem;
}
.faq summary {
  cursor: pointer;
  font-family: var(--display); font-size: 1.25rem;
  text-transform: uppercase; letter-spacing: 0.03em; color: var(--bit);
}
.faq p { margin: 0.65rem 0 0; color: var(--muted); }

.support-block {
  margin-top: 2rem; padding: 1.3rem 1.4rem;
  border: 1px solid var(--copper);
  background:
    linear-gradient(135deg, rgba(212, 160, 23, 0.12), transparent 55%),
    var(--paper);
}
.support-block h2 { margin-bottom: 0.5rem; }
.support-block p { margin: 0; color: var(--muted); }

.pagehead {
  padding: 2.75rem 0 1.5rem; border-bottom: 1px solid var(--line);
  background: radial-gradient(circle at 88% 18%, rgba(184, 115, 51, 0.12), transparent 42%);
}
.pagehead h1 {
  margin: 0 0 0.5rem;
  font-family: var(--display);
  font-size: clamp(2.2rem, 4.5vw, 3.2rem);
  text-transform: uppercase; letter-spacing: 0.03em;
}
.pagehead__intro { margin: 0; color: var(--muted); max-width: 44ch; }

.paper { padding: 2.25rem 0 3rem; }
.prose h2 {
  margin: 1.75rem 0 0.6rem;
  font-family: var(--display); font-size: 1.55rem;
  text-transform: uppercase; letter-spacing: 0.03em; color: var(--bit);
}
.prose p { margin: 0 0 1rem; }
.prose ul { margin: 0 0 1rem; padding-left: 1.2rem; color: var(--muted); }
.prose .note {
  margin-top: 1.5rem; padding: 0.85rem 1rem;
  border-left: 3px solid var(--copper);
  background: var(--mist); color: var(--muted); font-size: 0.95rem;
}

.foot {
  margin-top: 2rem; padding: 2.5rem 0 1.5rem;
  background: var(--bit); color: var(--paper);
}
.foot a { color: var(--chip); }
.foot a:hover { color: #E8C24A; }
.foot__grid {
  display: grid; grid-template-columns: 1.4fr 1fr; gap: 2rem;
  padding-bottom: 1.5rem;
  border-bottom: 1px solid rgba(238, 240, 234, 0.16);
}
.foot__brand {
  display: inline-flex; align-items: center; gap: 0.55rem;
  margin: 0 0 0.65rem;
  font-family: var(--display); font-size: 1.4rem;
  text-transform: uppercase; letter-spacing: 0.04em; color: var(--paper);
}
.foot__lead { margin: 0; color: rgba(238, 240, 234, 0.72); max-width: 40ch; }
.foot__nav {
  display: grid; grid-template-columns: 1fr 1fr;
  gap: 0.45rem 1rem; align-content: start;
}
.foot__nav a {
  font-family: var(--mono); font-size: 0.75rem;
  letter-spacing: 0.06em; text-transform: uppercase; text-decoration: none;
}
.foot__base {
  display: flex; justify-content: space-between; gap: 1rem; flex-wrap: wrap;
  padding-top: 1rem; font-size: 0.9rem; color: rgba(238, 240, 234, 0.58);
}
.foot__base p { margin: 0; }

@media (max-width: 840px) {
  .hero__grid, .flute, .foot__grid { grid-template-columns: 1fr; }
  .hero { padding-top: 2.5rem; }
  .bore { grid-template-columns: 3.25rem 1fr; }
  .hero h1 { font-size: clamp(2.6rem, 12vw, 3.6rem); }
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .auger-spin, .chip-drift, .chip-drift--b, .chip-drift--c { animation: none; }
}