@font-face {
  font-family: "B612";
  src: url("/fonts/B612-Regular.ttf") format("truetype");
  font-style: normal;
  font-weight: 400;
  font-display: swap;
}

@font-face {
  font-family: "B612";
  src: url("/fonts/B612-Bold.ttf") format("truetype");
  font-style: normal;
  font-weight: 700;
  font-display: swap;
}

@font-face {
  font-family: "B612 Mono";
  src: url("/fonts/B612Mono-Regular.ttf") format("truetype");
  font-style: normal;
  font-weight: 400;
  font-display: swap;
}

:root {
  --canvas: oklch(13% 0.012 166);
  --surface-1: oklch(17% 0.016 166);
  --surface-2: oklch(21% 0.018 166);
  --ink: oklch(91% 0.018 122);
  --muted: oklch(69% 0.026 145);
  --faint: oklch(50% 0.022 155);
  --line: color-mix(in oklch, var(--ink) 10%, transparent);
  --line-strong: color-mix(in oklch, var(--ink) 18%, transparent);
  --signal: oklch(79% 0.142 145);
  --amber: oklch(74% 0.12 73);
  --danger: oklch(68% 0.16 28);
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 14px;
  --radius-pill: 999px;
  --page-pad: clamp(20px, 4.2vw, 72px);
  --max-width: 1480px;
}

* {
  box-sizing: border-box;
}

html {
  background: var(--canvas);
  color-scheme: dark;
  scroll-behavior: smooth;
  touch-action: manipulation;
}

body {
  min-width: 320px;
  margin: 0;
  overflow-x: hidden;
  color: var(--ink);
  background:
    radial-gradient(circle at 82% 8%, color-mix(in oklch, var(--signal) 8%, transparent), transparent 28rem),
    var(--canvas);
  font-family: "B612", "Avenir Next", system-ui, sans-serif;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

a {
  color: inherit;
}

button,
a {
  -webkit-tap-highlight-color: transparent;
}

button:focus-visible,
a:focus-visible {
  outline: 2px solid var(--amber);
  outline-offset: 4px;
}

.skip-link {
  position: fixed;
  z-index: 20;
  top: 10px;
  left: 10px;
  padding: 10px 14px;
  color: var(--canvas);
  background: var(--signal);
  border-radius: var(--radius-sm);
  transform: translateY(-160%);
  transition: transform 160ms cubic-bezier(0.16, 1, 0.3, 1);
}

.skip-link:focus {
  transform: translateY(0);
}

.grain {
  position: fixed;
  z-index: -1;
  inset: 0;
  pointer-events: none;
  opacity: 0.18;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 180 180' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.92' numOctaves='2' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)' opacity='.14'/%3E%3C/svg%3E");
}

.site-header,
main,
.site-footer {
  width: min(100%, var(--max-width));
  margin-inline: auto;
  padding-inline: var(--page-pad);
}

.site-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 88px;
  border-bottom: 1px solid var(--line);
}

.wordmark {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  gap: 14px;
  color: var(--ink);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-decoration: none;
  text-transform: uppercase;
}

.wordmark-mark {
  display: grid;
  grid-template-columns: repeat(3, 3px);
  align-items: end;
  width: 17px;
  height: 18px;
  gap: 3px;
}

.wordmark-mark i {
  display: block;
  width: 3px;
  background: var(--signal);
  border-radius: var(--radius-pill);
}

.wordmark-mark i:nth-child(1) { height: 7px; }
.wordmark-mark i:nth-child(2) { height: 17px; }
.wordmark-mark i:nth-child(3) { height: 11px; }

.station-id {
  display: flex;
  gap: 24px;
  color: var(--faint);
  font-family: "B612 Mono", ui-monospace, monospace;
  font-size: 11px;
  font-variant-numeric: tabular-nums;
  letter-spacing: 0.04em;
}

.station-id span:first-child {
  color: var(--amber);
}

.overview {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(220px, 0.34fr);
  gap: clamp(44px, 8vw, 132px);
  min-height: 580px;
  padding-block: clamp(76px, 10vw, 150px) clamp(64px, 8vw, 112px);
  border-bottom: 1px solid var(--line);
}

.overview-copy {
  align-self: end;
  max-width: 930px;
}

.eyebrow,
.section-index {
  margin: 0 0 24px;
  color: var(--muted);
  font-family: "B612 Mono", ui-monospace, monospace;
  font-size: 11px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.eyebrow {
  display: flex;
  align-items: center;
  gap: 10px;
}

.live-dot {
  position: relative;
  width: 7px;
  height: 7px;
  background: var(--signal);
  border-radius: 50%;
  box-shadow: 0 0 0 5px color-mix(in oklch, var(--signal) 10%, transparent);
}

h1,
h2,
p {
  text-wrap: pretty;
}

h1,
h2 {
  text-wrap: balance;
}

h1 {
  max-width: 930px;
  margin: 0;
  font-size: clamp(48px, 7.3vw, 112px);
  font-weight: 400;
  line-height: 0.91;
  letter-spacing: -0.036em;
}

h1 span {
  color: var(--muted);
}

.intro {
  max-width: 60ch;
  margin: 38px 0 0;
  color: var(--muted);
  font-size: clamp(16px, 1.5vw, 21px);
  line-height: 1.62;
}

.status-rail {
  align-self: end;
  margin: 0;
  border-top: 1px solid var(--line-strong);
}

.status-rail div {
  padding: 18px 0 20px;
  border-bottom: 1px solid var(--line);
}

.status-rail dt {
  margin-bottom: 8px;
  color: var(--faint);
  font-family: "B612 Mono", ui-monospace, monospace;
  font-size: 10px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.status-rail dd {
  display: flex;
  align-items: center;
  gap: 8px;
  margin: 0;
  font-family: "B612 Mono", ui-monospace, monospace;
  font-size: 14px;
  font-variant-numeric: tabular-nums;
}

.status-glyph {
  width: 8px;
  height: 8px;
  background: var(--signal);
  border-radius: 50%;
}

.atlas,
.instrument,
.method {
  padding-block: clamp(72px, 8vw, 120px);
  border-bottom: 1px solid var(--line);
}

.atlas-heading {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 40px;
  margin-bottom: 36px;
}

.atlas-heading .section-index {
  margin-bottom: 12px;
}

h2 {
  margin: 0;
  font-size: clamp(32px, 4vw, 58px);
  font-weight: 400;
  line-height: 1;
  letter-spacing: -0.022em;
}

.atlas-heading > p {
  max-width: 40ch;
  margin: 0;
  color: var(--faint);
  font-size: 12px;
  line-height: 1.6;
  text-align: right;
}

.plot-frame {
  position: relative;
  min-height: clamp(420px, 54vw, 720px);
  overflow: hidden;
  background:
    linear-gradient(color-mix(in oklch, var(--ink) 4%, transparent) 1px, transparent 1px),
    linear-gradient(90deg, color-mix(in oklch, var(--ink) 4%, transparent) 1px, transparent 1px),
    var(--surface-1);
  background-size: 44px 44px;
  border-radius: var(--radius-lg);
  box-shadow: inset 0 0 0 1px var(--line);
}

#atlas-canvas {
  position: absolute;
  inset: 0;
  display: block;
  width: 100%;
  height: 100%;
}

.radar-sweep {
  position: absolute;
  top: 50%;
  left: 50%;
  width: min(74vw, 920px);
  aspect-ratio: 1;
  pointer-events: none;
  opacity: 0.18;
  background: conic-gradient(from 260deg, transparent 0deg 330deg, color-mix(in oklch, var(--signal) 38%, transparent) 352deg, transparent 360deg);
  border-radius: 50%;
  transform: translate(-50%, -50%) rotate(0deg);
  animation: sweep 14s linear infinite;
}

@keyframes sweep {
  to { transform: translate(-50%, -50%) rotate(360deg); }
}

.plot-corner {
  position: absolute;
  color: var(--faint);
  font-family: "B612 Mono", ui-monospace, monospace;
  font-size: 9px;
  letter-spacing: 0.11em;
}

.plot-corner-top { top: 18px; right: 20px; }
.plot-corner-bottom { bottom: 18px; left: 20px; }

.route-ledger {
  margin-top: 22px;
  font-family: "B612 Mono", ui-monospace, monospace;
  font-size: 11px;
  font-variant-numeric: tabular-nums;
}

.ledger-row {
  display: grid;
  grid-template-columns: minmax(180px, 1.3fr) 0.65fr 1fr 0.65fr;
  gap: 24px;
  align-items: center;
  min-height: 52px;
  border-bottom: 1px solid var(--line);
}

.ledger-row span:not(:first-child) {
  text-align: right;
}

.ledger-head {
  min-height: 38px;
  color: var(--faint);
  font-size: 9px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.ledger-row b {
  margin-right: 10px;
  color: var(--amber);
  font-weight: 400;
}

.state-active {
  color: var(--signal);
}

.instrument {
  display: grid;
  grid-template-columns: minmax(0, 0.8fr) minmax(320px, 1.2fr);
  gap: clamp(52px, 9vw, 150px);
  align-items: end;
}

.instrument-copy > p:not(.section-index),
.method > div p {
  max-width: 62ch;
  margin: 28px 0 0;
  color: var(--muted);
  font-size: 15px;
  line-height: 1.75;
}

#pulse-button {
  display: inline-flex;
  align-items: center;
  justify-content: space-between;
  min-width: 174px;
  min-height: 48px;
  margin-top: 34px;
  padding: 0 16px 0 18px;
  color: var(--canvas);
  background: var(--signal);
  border: 0;
  border-radius: var(--radius-sm);
  font: 700 12px/1 "B612", sans-serif;
  cursor: pointer;
  transition-property: transform, opacity;
  transition-duration: 160ms;
  transition-timing-function: cubic-bezier(0.16, 1, 0.3, 1);
}

#pulse-button:active {
  transform: scale(0.96);
}

#pulse-button[disabled] {
  cursor: wait;
  opacity: 0.58;
}

.pulse-readout {
  position: relative;
  min-height: 270px;
  padding: clamp(28px, 5vw, 62px);
  overflow: hidden;
  background: var(--surface-2);
  border-radius: var(--radius-lg);
  box-shadow: inset 0 0 0 1px var(--line);
}

.pulse-readout::after {
  position: absolute;
  right: -8%;
  bottom: -46%;
  width: 44%;
  aspect-ratio: 1;
  content: "";
  border: 1px solid color-mix(in oklch, var(--signal) 28%, transparent);
  border-radius: 50%;
  box-shadow:
    0 0 0 34px color-mix(in oklch, var(--signal) 4%, transparent),
    0 0 0 68px color-mix(in oklch, var(--signal) 3%, transparent);
}

.readout-value {
  display: flex;
  align-items: end;
  gap: 12px;
  color: var(--signal);
  font-family: "B612 Mono", ui-monospace, monospace;
  font-variant-numeric: tabular-nums;
}

.readout-value span {
  font-size: clamp(76px, 11vw, 164px);
  line-height: 0.82;
  letter-spacing: -0.06em;
}

.readout-value small {
  margin-bottom: 8px;
  color: var(--muted);
  font-size: 14px;
}

#pulse-label {
  margin: 24px 0 0;
  color: var(--muted);
  font-size: 12px;
}

.readout-scale {
  display: flex;
  gap: 7px;
  margin-top: 30px;
}

.readout-scale i {
  width: 22px;
  height: 3px;
  background: var(--faint);
  opacity: 0.5;
  transform-origin: left center;
}

.pulse-readout.is-sampling .readout-scale i {
  animation: meter 900ms ease-in-out infinite alternate;
}

.pulse-readout.is-sampling .readout-scale i:nth-child(2) { animation-delay: 80ms; }
.pulse-readout.is-sampling .readout-scale i:nth-child(3) { animation-delay: 160ms; }
.pulse-readout.is-sampling .readout-scale i:nth-child(4) { animation-delay: 240ms; }
.pulse-readout.is-sampling .readout-scale i:nth-child(5) { animation-delay: 320ms; }
.pulse-readout.is-sampling .readout-scale i:nth-child(6) { animation-delay: 400ms; }
.pulse-readout.is-sampling .readout-scale i:nth-child(7) { animation-delay: 480ms; }
.pulse-readout.is-sampling .readout-scale i:nth-child(8) { animation-delay: 560ms; }

@keyframes meter {
  to { opacity: 1; transform: scaleX(0.55); }
}

.method {
  display: grid;
  grid-template-columns: 0.3fr 1fr 0.85fr;
  gap: clamp(36px, 6vw, 100px);
  align-items: start;
}

.method ol {
  margin: 2px 0 0;
  padding: 0;
  list-style: none;
  border-top: 1px solid var(--line-strong);
}

.method li {
  display: grid;
  grid-template-columns: 34px 1fr;
  gap: 16px;
  padding: 18px 0;
  border-bottom: 1px solid var(--line);
}

.method li span {
  color: var(--amber);
  font-family: "B612 Mono", ui-monospace, monospace;
  font-size: 10px;
}

.method li p {
  margin: 0;
  color: var(--muted);
  font-size: 13px;
  line-height: 1.5;
}

.method li b {
  color: var(--ink);
  font-weight: 400;
}

.site-footer {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  gap: 30px;
  align-items: center;
  min-height: 112px;
  color: var(--faint);
  font-family: "B612 Mono", ui-monospace, monospace;
  font-size: 9px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.site-footer p:last-child {
  text-align: right;
}

.site-footer nav {
  display: flex;
  gap: 20px;
}

.site-footer a {
  min-height: 40px;
  display: inline-flex;
  align-items: center;
  text-underline-offset: 4px;
}

.legal {
  min-height: 100vh;
}

.legal main {
  max-width: 880px;
  padding-block: clamp(72px, 10vw, 150px);
}

.legal h1 {
  font-size: clamp(48px, 8vw, 86px);
  line-height: 0.96;
}

.legal article {
  max-width: 66ch;
  margin-top: 54px;
  color: var(--muted);
  line-height: 1.78;
}

.legal article h2 {
  margin-top: 42px;
  color: var(--ink);
  font-size: 22px;
}

.legal article a {
  color: var(--signal);
  text-underline-offset: 4px;
}

.not-found {
  display: grid;
  min-height: 100vh;
  place-items: center;
  padding: var(--page-pad);
}

.not-found main {
  width: min(100%, 920px);
  padding: 0;
}

.not-found .error-code {
  margin: 0;
  color: var(--amber);
  font: 11px/1 "B612 Mono", monospace;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.not-found h1 {
  margin-top: 28px;
}

.not-found p:not(.error-code) {
  max-width: 48ch;
  margin: 30px 0;
  color: var(--muted);
  line-height: 1.65;
}

.not-found a {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  color: var(--signal);
  text-underline-offset: 5px;
}

@media (hover: hover) {
  #pulse-button:hover {
    transform: translateY(-2px);
  }

  .site-footer a:hover,
  .not-found a:hover {
    color: var(--ink);
  }
}

@media (max-width: 860px) {
  .overview,
  .instrument,
  .method {
    grid-template-columns: 1fr;
  }

  .overview {
    min-height: 0;
    gap: 56px;
  }

  .status-rail {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
  }

  .status-rail div {
    padding-right: 18px;
  }

  .method {
    gap: 32px;
  }

  .method ol {
    margin-top: 16px;
  }
}

@media (max-width: 620px) {
  .site-header {
    min-height: 76px;
  }

  .station-id span:last-child {
    display: none;
  }

  .overview {
    padding-top: 72px;
  }

  h1 {
    font-size: clamp(44px, 14vw, 68px);
  }

  .intro {
    margin-top: 28px;
  }

  .status-rail {
    grid-template-columns: 1fr;
  }

  .atlas-heading {
    display: block;
  }

  .atlas-heading > p {
    margin-top: 18px;
    text-align: left;
  }

  .plot-frame {
    min-height: 440px;
    background-size: 32px 32px;
  }

  .ledger-head {
    display: none;
  }

  .ledger-row {
    grid-template-columns: 1fr auto;
    gap: 8px 20px;
    padding-block: 14px;
  }

  .ledger-row span:nth-child(2),
  .ledger-row span:nth-child(3) {
    display: none;
  }

  .pulse-readout {
    min-height: 240px;
  }

  .readout-value span {
    font-size: clamp(72px, 27vw, 112px);
  }

  .site-footer {
    grid-template-columns: 1fr auto;
    min-height: 130px;
  }

  .site-footer p:last-child {
    display: none;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after {
    animation-duration: 1ms !important;
    animation-iteration-count: 1 !important;
  }
}