:root {
  --bg: #0e1210;
  --panel: #171c19;
  --line: #2c3530;
  --text: #eaede6;
  --muted: #a4afa6;
  --amber: #ffb224;
  --sans: "Instrument Sans", system-ui, sans-serif;
  --mono: "IBM Plex Mono", ui-monospace, Menlo, monospace;
  color-scheme: dark;
}

* { box-sizing: border-box; margin: 0; }

html { scroll-padding-top: 88px; -webkit-text-size-adjust: 100%; }

body {
  background: var(--bg);
  color: var(--text);
  font: 400 1.0625rem/1.6 var(--sans);
}

ul { list-style: none; padding: 0; }
a { color: inherit; }
h1, h2, h3 { font-weight: 500; line-height: 1.1; text-wrap: balance; }
h3 { font-size: 1.0625rem; font-weight: 600; line-height: 1.3; }

:focus-visible { outline: 2px solid var(--amber); outline-offset: 3px; }
main:focus { outline: none; }

.wrap { width: min(100% - 32px, 1240px); margin-inline: auto; }

.skip {
  position: absolute;
  left: 16px;
  top: -60px;
  z-index: 20;
  padding: 8px 14px;
  background: var(--amber);
  color: var(--bg);
}
.skip:focus { top: 8px; }

/* Header */
.top {
  position: sticky;
  top: 0;
  z-index: 10;
  background: var(--bg);
  border-bottom: 1px solid var(--line);
}
.top-in {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: center;
  gap: 4px 24px;
  padding-block: 12px;
}
.brand {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-weight: 600;
  font-size: 1.125rem;
  text-decoration: none;
}
.brand svg { color: var(--amber); }
.top nav { display: flex; gap: 4px 22px; }
.top nav a {
  padding-block: 4px;
  color: var(--muted);
  font-size: .9375rem;
  text-decoration: none;
}
.top nav a:hover { color: var(--text); }

/* Hero */
.hero {
  display: grid;
  grid-template-columns: 7fr 5fr;
  gap: 64px;
  align-items: center;
  padding-block: 96px 112px;
}
.tag, .u {
  font-family: var(--mono);
  font-size: .8125rem;
  letter-spacing: .02em;
}
.tag { color: var(--amber); margin-bottom: 24px; }
h1 { font-size: clamp(2.5rem, 5.4vw, 4.75rem); letter-spacing: -.025em; line-height: 1.04; }
.sub { max-width: 54ch; margin-block: 28px 36px; color: var(--muted); font-size: 1.1875rem; }
.btn {
  display: inline-block;
  padding: 12px 24px;
  background: var(--amber);
  color: var(--bg);
  font-weight: 600;
  text-decoration: none;
}
.btn:hover { background: var(--text); }

/* Rack: mounting rails are drawn as repeating holes down each side */
.rack {
  display: grid;
  gap: 4px;
  padding: 10px 26px;
  border: 1px solid var(--line);
  background:
    radial-gradient(circle, #000 3px, transparent 3.5px) 6px 0 / 14px 22px no-repeat round,
    radial-gradient(circle, #000 3px, transparent 3.5px) calc(100% - 6px) 0 / 14px 22px no-repeat round,
    var(--panel);
}
.blank {
  height: 22px;
  background: repeating-linear-gradient(90deg, var(--line) 0 1px, transparent 1px 8px);
  opacity: .55;
}
.unit {
  display: grid;
  grid-template-columns: auto auto 1fr;
  align-items: center;
  gap: 2px 12px;
  padding: 20px 16px;
  background: var(--bg);
  border: 1px solid var(--line);
  text-decoration: none;
  transition: border-color .15s;
}
.unit:hover { border-color: var(--amber); }
.unit b { font-weight: 600; }
.unit .u { color: var(--muted); }
.unit small { grid-column: 3; color: var(--muted); font-size: .875rem; line-height: 1.35; }
.led {
  display: inline-block;
  flex: none;
  width: 8px;
  height: 8px;
  background: var(--amber);
  border-radius: 50%;
  box-shadow: 0 0 8px var(--amber);
  animation: blink 4s steps(1) infinite;
}
.unit:nth-of-type(2) .led { animation-delay: -1.3s; }
.unit:nth-of-type(3) .led { animation-delay: -2.7s; }
@keyframes blink {
  0%, 88%, 94% { opacity: 1; }
  91%, 97% { opacity: .3; }
}

/* Pillars */
.pillar { padding-block: 88px; border-top: 1px solid var(--line); }
.grid { display: grid; grid-template-columns: 4fr 8fr; gap: 32px 64px; }
.head { position: sticky; top: 96px; align-self: start; }
.head .u { color: var(--amber); margin-bottom: 12px; }
h2 { font-size: clamp(2rem, 3.4vw, 3rem); letter-spacing: -.02em; }
.body > p:not(.lead, .note) { max-width: 60ch; color: var(--muted); }
.lead { max-width: 28ch; margin-bottom: 20px; font-size: clamp(1.375rem, 2.2vw, 1.75rem); line-height: 1.25; letter-spacing: -.01em; }

.rows, .apps { margin-top: 40px; }
.rows { border-top: 1px solid var(--line); }
li p { color: var(--muted); }

.rows li {
  display: grid;
  grid-template-columns: 5fr 7fr;
  gap: 4px 24px;
  padding-block: 18px;
  border-bottom: 1px solid var(--line);
}
.note { margin-top: 24px; color: var(--muted); }
.note a { color: var(--text); text-decoration-color: var(--amber); text-underline-offset: 3px; }

.apps li {
  padding: 22px 20px;
  margin-top: 8px;
  background: var(--panel);
  border: 1px solid var(--line);
}
.apps h3 { margin-bottom: 4px; }

/* Contact */
.contact { padding-block: 88px; background: var(--amber); color: var(--bg); }
.contact h2 { max-width: 20ch; margin-bottom: 32px; }
.contact :focus-visible { outline-color: var(--bg); }
.mail {
  font-family: var(--mono);
  font-size: clamp(1.125rem, 3vw, 1.75rem);
  font-weight: 500;
  text-underline-offset: 5px;
  overflow-wrap: anywhere;
}
.mail:hover { text-decoration-thickness: 3px; }

.foot { padding-block: 28px; color: var(--muted); font-size: .9375rem; }

/* Tablet and down */
@media (max-width: 900px) {
  .hero { grid-template-columns: 1fr; gap: 56px; padding-block: 64px 72px; }
  .grid { grid-template-columns: 1fr; }
  .head { position: static; }
  .pillar, .contact { padding-block: 64px; }
}

/* Phone */
@media (max-width: 600px) {
  html { scroll-padding-top: 104px; }
  .top nav { width: 100%; justify-content: space-between; gap: 8px; }
  .top nav a { font-size: .875rem; }
  .sub { font-size: 1.0625rem; }
  .rows li { grid-template-columns: 1fr; }
}

@media (prefers-reduced-motion: no-preference) {
  html { scroll-behavior: smooth; }
}
@media (prefers-reduced-motion: reduce) {
  .led { animation: none; }
  .unit { transition: none; }
}