/* General Relay — industrial telemetry.
   Dark plant floor, hairline grid, one signal colour. No framework, no build. */

:root {
  --ink: #0a0a0b;
  --ink-2: #101013;
  --line: #232327;
  --paper: #f2efe9;
  --muted: #8d8b87;
  --signal: #ff4b12;
  --live: #7be0a8;

  --mono: 'JetBrains Mono', ui-monospace, SFMono-Regular, Menlo, monospace;
  --display: 'Bricolage Grotesque', var(--mono);

  --gutter: clamp(1.25rem, 4vw, 5rem);
  --col: 88rem;
}

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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--ink);
  color: var(--paper);
  font-family: var(--mono);
  font-size: clamp(0.875rem, 0.82rem + 0.2vw, 0.95rem);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

::selection {
  background: var(--signal);
  color: var(--ink);
}

a {
  color: inherit;
}

/* ── Atmosphere ─────────────────────────────────────────────────────────── */

/* Vertical hairlines, fixed behind everything, so the page reads as a chart. */
.rules {
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  background: repeating-linear-gradient(
    90deg,
    transparent 0,
    transparent calc(100% / 6 - 1px),
    var(--line) calc(100% / 6 - 1px),
    var(--line) calc(100% / 6)
  );
  opacity: 0.55;
  mask-image: linear-gradient(180deg, transparent, #000 12rem, #000 70%, transparent);
}

/* Film grain. feTurbulence, tiled — cheaper than shipping a texture. */
.grain {
  position: fixed;
  inset: -50%;
  z-index: 1;
  pointer-events: none;
  opacity: 0.16;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='160' height='160'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='3'/%3E%3C/filter%3E%3Crect width='160' height='160' filter='url(%23n)'/%3E%3C/svg%3E");
  animation: drift 6s steps(4) infinite;
}

@keyframes drift {
  0% {
    transform: translate(0, 0);
  }
  25% {
    transform: translate(-2%, 1%);
  }
  50% {
    transform: translate(1%, -2%);
  }
  75% {
    transform: translate(-1%, -1%);
  }
  100% {
    transform: translate(0, 0);
  }
}

/* A slow sweep, like a monitor refreshing. */
.scan {
  position: fixed;
  inset: 0;
  z-index: 2;
  pointer-events: none;
  background: linear-gradient(
    180deg,
    transparent 0%,
    rgba(255, 75, 18, 0.06) 50%,
    transparent 100%
  );
  height: 60vh;
  animation: sweep 14s linear infinite;
}

@keyframes sweep {
  from {
    transform: translateY(-80vh);
  }
  to {
    transform: translateY(140vh);
  }
}

.skip {
  position: absolute;
  left: -9999px;
  z-index: 99;
}
.skip:focus {
  left: var(--gutter);
  top: 1rem;
  background: var(--signal);
  color: var(--ink);
  padding: 0.5rem 0.75rem;
}

/* ── Chrome ─────────────────────────────────────────────────────────────── */

.topbar,
main,
.footer {
  position: relative;
  z-index: 3;
}

.topbar {
  display: flex;
  align-items: center;
  gap: 2rem;
  padding: 1.15rem var(--gutter);
  border-bottom: 1px solid var(--line);
  background: rgba(10, 10, 11, 0.72);
  backdrop-filter: blur(8px);
  position: sticky;
  top: 0;
}

.wordmark {
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  font-family: var(--display);
  font-weight: 800;
  font-size: 1rem;
  letter-spacing: -0.02em;
  text-decoration: none;
  margin-right: auto;
}

.mark {
  width: 1.05rem;
  height: 1.05rem;
  fill: var(--signal);
}
.mark .mark-b {
  fill: var(--paper);
}

.nav {
  display: flex;
  gap: 1.5rem;
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.14em;
}

.nav a {
  color: var(--muted);
  text-decoration: none;
  transition: color 0.2s;
}
.nav a:hover {
  color: var(--paper);
}

.status {
  margin: 0;
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.16em;
  color: var(--muted);
  border: 1px solid var(--line);
  padding: 0.3rem 0.7rem;
}

.dot {
  width: 6px;
  height: 6px;
  background: var(--signal);
  border-radius: 50%;
  animation: pulse 2.4s ease-in-out infinite;
}

@keyframes pulse {
  0%,
  100% {
    opacity: 1;
    box-shadow: 0 0 0 0 rgba(255, 75, 18, 0.5);
  }
  50% {
    opacity: 0.45;
    box-shadow: 0 0 0 5px rgba(255, 75, 18, 0);
  }
}

/* ── Hero ───────────────────────────────────────────────────────────────── */

.hero {
  position: relative;
  max-width: var(--col);
  margin: 0 auto;
  padding: clamp(4rem, 12vh, 9rem) var(--gutter) clamp(3.5rem, 9vh, 6rem);
}

/* The one thing you remember: 402 set enormous, bled off the right edge. */
.ghost {
  position: absolute;
  top: clamp(1rem, 5vh, 4rem);
  right: -0.08em;
  font-family: var(--display);
  font-weight: 800;
  font-size: clamp(11rem, 34vw, 30rem);
  line-height: 0.72;
  letter-spacing: -0.05em;
  color: transparent;
  -webkit-text-stroke: 1px #1e1e22;
  pointer-events: none;
  user-select: none;
  animation: ghost-in 1.6s cubic-bezier(0.2, 0.7, 0.2, 1) both;
}

@keyframes ghost-in {
  from {
    opacity: 0;
    transform: translateX(2rem);
  }
  to {
    opacity: 1;
    transform: none;
  }
}

.eyebrow {
  margin: 0 0 clamp(1.5rem, 4vh, 2.5rem);
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.22em;
  color: var(--signal);
}
.eyebrow span {
  color: var(--line);
  margin: 0 0.35rem;
}

h1 {
  margin: 0;
  font-family: var(--display);
  font-weight: 800;
  font-size: clamp(2.75rem, 9.5vw, 8rem);
  line-height: 0.92;
  letter-spacing: -0.045em;
  text-wrap: balance;
}

h1 em {
  font-style: normal;
  color: var(--signal);
}

.lede {
  max-width: 46ch;
  margin: clamp(1.5rem, 4vh, 2.25rem) 0 0;
  color: #c8c4bc;
  font-size: clamp(0.95rem, 0.9rem + 0.25vw, 1.1rem);
  line-height: 1.7;
}

.cta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-top: 2.25rem;
}

.btn {
  display: inline-block;
  padding: 0.8rem 1.4rem;
  border: 1px solid var(--line);
  text-decoration: none;
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  transition:
    border-color 0.2s,
    background 0.2s,
    color 0.2s,
    transform 0.2s;
}

.btn:hover {
  border-color: var(--paper);
  transform: translateY(-2px);
}

.btn-solid {
  background: var(--signal);
  border-color: var(--signal);
  color: var(--ink);
  font-weight: 700;
}
.btn-solid:hover {
  background: #ff632f;
  border-color: #ff632f;
}

.rail {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(9rem, 1fr));
  gap: 0;
  margin: clamp(3.5rem, 9vh, 6rem) 0 0;
  border-top: 1px solid var(--line);
}

.rail > div {
  padding: 1.1rem 1.25rem 1.1rem 0;
  border-right: 1px solid var(--line);
}
.rail > div:last-child {
  border-right: 0;
}
.rail > div:not(:first-child) {
  padding-left: 1.25rem;
}

.rail dt {
  font-size: 0.66rem;
  text-transform: uppercase;
  letter-spacing: 0.18em;
  color: var(--muted);
}

.rail dd {
  margin: 0.35rem 0 0;
  font-family: var(--display);
  font-weight: 800;
  font-size: 1.35rem;
  letter-spacing: -0.02em;
}

/* ── Sections ───────────────────────────────────────────────────────────── */

.section {
  max-width: var(--col);
  margin: 0 auto;
  padding: clamp(4rem, 11vh, 7.5rem) var(--gutter);
  border-top: 1px solid var(--line);
}

.section-head {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1rem;
  margin-bottom: clamp(2.5rem, 6vh, 4rem);
}

@media (min-width: 60rem) {
  .section-head {
    grid-template-columns: minmax(0, 20rem) minmax(0, 34rem);
    gap: 4rem;
    align-items: start;
  }
}

.section-head h2 {
  margin: 0;
  font-family: var(--display);
  font-weight: 800;
  font-size: clamp(1.6rem, 3.2vw, 2.6rem);
  line-height: 1;
  letter-spacing: -0.035em;
}

.idx {
  display: block;
  font-family: var(--mono);
  font-weight: 400;
  font-size: 0.7rem;
  letter-spacing: 0.2em;
  color: var(--signal);
  margin-bottom: 0.9rem;
}

.section-head p {
  margin: 0;
  color: var(--muted);
  max-width: 52ch;
}

/* ── Handshake ──────────────────────────────────────────────────────────── */

.handshake {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
}

@media (min-width: 56rem) {
  .handshake {
    grid-template-columns: repeat(3, 1fr);
  }
}

.step {
  background: var(--ink-2);
  padding: 1.5rem;
  display: flex;
  flex-direction: column;
  gap: 1rem;
  position: relative;
  animation: step-in 0.7s cubic-bezier(0.2, 0.7, 0.2, 1) both;
  animation-delay: var(--s);
}

/* The signal travelling left to right between the three panes. */
.step::after {
  content: '';
  position: absolute;
  left: 0;
  right: 0;
  top: -1px;
  height: 1px;
  background: var(--signal);
  transform-origin: left;
  animation: trace 0.6s ease-out both;
  animation-delay: calc(var(--s) + 0.15s);
}

@keyframes trace {
  from {
    transform: scaleX(0);
  }
  to {
    transform: scaleX(1);
  }
}

@keyframes step-in {
  from {
    opacity: 0;
    transform: translateY(1.25rem);
  }
  to {
    opacity: 1;
    transform: none;
  }
}

.step-no {
  margin: 0;
  font-size: 0.7rem;
  letter-spacing: 0.2em;
  color: var(--signal);
}
.step-no span {
  color: var(--muted);
  text-transform: uppercase;
  margin-left: 0.6rem;
}

.step pre {
  margin: 0;
  padding: 1rem;
  background: #000;
  border: 1px solid var(--line);
  overflow-x: auto;
  font-size: 0.78rem;
  line-height: 1.7;
  color: #a9a6a0;
}

.step code b {
  color: var(--paper);
}
.step code b.warn {
  color: var(--signal);
}
.step code b.ok {
  color: var(--live);
}
.step code i {
  font-style: normal;
  color: #5f5d59;
}

.step-note {
  margin: 0;
  color: var(--muted);
  font-size: 0.8rem;
  margin-top: auto;
}

/* ── Catalog ────────────────────────────────────────────────────────────── */

.catalog {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.82rem;
}

.catalog th {
  text-align: left;
  font-weight: 400;
  font-size: 0.66rem;
  text-transform: uppercase;
  letter-spacing: 0.18em;
  color: var(--muted);
  padding: 0 0 0.9rem;
  border-bottom: 1px solid var(--line);
}

.catalog td {
  padding: 1.05rem 1rem 1.05rem 0;
  border-bottom: 1px solid var(--line);
  color: var(--muted);
}

.catalog tbody tr {
  transition: background 0.2s;
}
.catalog tbody tr:hover {
  background: var(--ink-2);
}

.catalog td:first-child {
  color: var(--paper);
}
.catalog code {
  font-size: 0.85em;
}

.tag {
  display: inline-block;
  padding: 0.2rem 0.55rem;
  border: 1px solid var(--line);
  font-size: 0.62rem;
  text-transform: uppercase;
  letter-spacing: 0.16em;
  color: var(--muted);
}

.tag-live {
  color: var(--live);
  border-color: rgba(123, 224, 168, 0.35);
}

.fineprint {
  margin: 1.5rem 0 0;
  font-size: 0.75rem;
  color: #5f5d59;
  max-width: 60ch;
}

/* ── Specs ──────────────────────────────────────────────────────────────── */

.specs {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
}

@media (min-width: 42rem) {
  .specs {
    grid-template-columns: repeat(2, 1fr);
  }
}
@media (min-width: 70rem) {
  .specs {
    grid-template-columns: repeat(3, 1fr);
  }
}

.specs li {
  background: var(--ink);
  padding: 1.4rem 1.5rem;
  transition: background 0.25s;
}
.specs li:hover {
  background: var(--ink-2);
}

.specs b {
  display: block;
  font-family: var(--display);
  font-weight: 800;
  font-size: 1.25rem;
  letter-spacing: -0.02em;
  margin-bottom: 0.3rem;
}

.specs span {
  color: var(--muted);
  font-size: 0.8rem;
}

/* ── Footer ─────────────────────────────────────────────────────────────── */

.footer {
  border-top: 1px solid var(--line);
  margin-top: clamp(3rem, 8vh, 6rem);
}

.ticker {
  overflow: hidden;
  border-bottom: 1px solid var(--line);
  padding: 0.9rem 0;
  font-size: 0.72rem;
  letter-spacing: 0.28em;
  color: #2e2e33;
  white-space: nowrap;
}

.ticker-track {
  display: inline-flex;
  animation: roll 38s linear infinite;
}
.ticker-track span {
  padding-right: 2rem;
}
.ticker i {
  color: var(--signal);
  font-style: normal;
  opacity: 0.55;
}

@keyframes roll {
  to {
    transform: translateX(-50%);
  }
}

.footer-grid {
  max-width: var(--col);
  margin: 0 auto;
  padding: 2rem var(--gutter) 3rem;
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 1.25rem 2.5rem;
}

.footer-mark {
  margin: 0 auto 0 0;
  font-family: var(--display);
  font-weight: 800;
  letter-spacing: -0.02em;
}

.footer-grid nav {
  display: flex;
  gap: 1.5rem;
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.14em;
}

.footer-grid nav a {
  color: var(--muted);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition:
    color 0.2s,
    border-color 0.2s;
}
.footer-grid nav a:hover {
  color: var(--paper);
  border-color: var(--signal);
}

.colophon {
  margin: 0;
  font-size: 0.72rem;
  color: #4c4a47;
}

/* ── Load-in ────────────────────────────────────────────────────────────── */

.reveal {
  animation: reveal 0.8s cubic-bezier(0.2, 0.7, 0.2, 1) both;
  animation-delay: var(--d, 0ms);
}

@keyframes reveal {
  from {
    opacity: 0;
    transform: translateY(1rem);
  }
  to {
    opacity: 1;
    transform: none;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation: none !important;
    transition: none !important;
  }
  html {
    scroll-behavior: auto;
  }
}