@font-face {
  font-family: "Archivo Black";
  font-style: normal;
  font-weight: 400;
  font-display: swap;
  src: url("./assets/fonts/archivo-black-latin-400-normal.woff2") format("woff2");
}

@font-face {
  font-family: "IBM Plex Sans";
  font-style: normal;
  font-weight: 400;
  font-display: swap;
  src: url("./assets/fonts/ibm-plex-sans-latin-400-normal.woff2") format("woff2");
}

@font-face {
  font-family: "IBM Plex Sans";
  font-style: normal;
  font-weight: 600;
  font-display: swap;
  src: url("./assets/fonts/ibm-plex-sans-latin-600-normal.woff2") format("woff2");
}

@font-face {
  font-family: "IBM Plex Mono";
  font-style: normal;
  font-weight: 500;
  font-display: swap;
  src: url("./assets/fonts/ibm-plex-mono-latin-500-normal.woff2") format("woff2");
}

@font-face {
  font-family: "IBM Plex Mono";
  font-style: normal;
  font-weight: 600;
  font-display: swap;
  src: url("./assets/fonts/ibm-plex-mono-latin-600-normal.woff2") format("woff2");
}

:root {
  --cold-canvas: #e9e9ee;
  --ink: #0b0b0c;
  --paper: #ffffff;
  --signal-blue: #3157ff;
  --hazard-orange: #ff4d00;
  --steel: #b7bac4;
  --font-display: "Archivo Black", Impact, sans-serif;
  --font-body: "IBM Plex Sans", Arial, sans-serif;
  --font-utility: "IBM Plex Mono", ui-monospace, monospace;
  --gutter: clamp(1rem, 3vw, 3rem);
  --rule: 2px solid var(--ink);
}

*,
*::before,
*::after {
  box-sizing: border-box;
  min-width: 0;
}

html {
  color: var(--ink);
  background: var(--cold-canvas);
  scroll-behavior: smooth;
  overflow-x: clip;
}

body {
  margin: 0;
  min-width: 320px;
  min-height: 100vh;
  font-family: var(--font-body);
  font-size: 1rem;
  line-height: 1.55;
  overflow-wrap: anywhere;
}

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

a,
button {
  color: inherit;
  font: inherit;
}

a {
  text-decoration-thickness: 2px;
  text-underline-offset: 0.2em;
}

button {
  appearance: none;
  border-radius: 0;
  cursor: pointer;
}

:focus-visible {
  outline: 3px solid var(--signal-blue);
  outline-offset: 4px;
  border-radius: 2px;
}

.skip-link:focus-visible,
.brand:focus-visible {
  outline-offset: -3px;
}

[hidden] {
  display: none;
}

.skip-link {
  position: fixed;
  z-index: 20;
  inset: 0 auto auto var(--gutter);
  padding: 0.7rem 1rem;
  color: var(--paper);
  background: var(--ink);
  font-family: var(--font-utility);
  font-weight: 600;
  transform: translateY(-110%);
}

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

.shell,
header > *,
main > section,
footer {
  width: min(100%, 1440px);
  margin-inline: auto;
}

.hazard-rail,
.section-number,
.brand,
.nav-links,
.gate-modes,
.code-heading,
footer ul {
  font-family: var(--font-utility);
  font-size: 0.75rem;
  font-weight: 600;
  line-height: 1.2;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.hazard-rail {
  width: 100%;
  max-width: none;
  margin: 0;
  padding: 0.55rem var(--gutter);
  color: var(--ink);
  background: var(--hazard-orange);
  border-bottom: var(--rule);
  white-space: nowrap;
  overflow: hidden;
}

nav {
  display: grid;
  grid-template-columns: repeat(12, minmax(0, 1fr));
  align-items: stretch;
  min-height: 80px;
  border-inline: var(--rule);
  border-bottom: var(--rule);
}

.brand {
  display: flex;
  grid-column: span 3;
  align-items: center;
  padding-inline: var(--gutter);
  border-right: var(--rule);
  font-family: var(--font-display);
  font-size: 1.15rem;
  letter-spacing: -0.035em;
  text-decoration: none;
}

.nav-links {
  display: flex;
  grid-column: span 9;
  align-items: center;
  justify-content: flex-end;
  gap: clamp(1rem, 2.5vw, 2.5rem);
  padding-inline: var(--gutter);
}

.nav-links a {
  text-decoration: none;
}

.nav-links a:hover {
  text-decoration: underline;
}

.hero {
  display: grid;
  grid-template-columns: repeat(12, minmax(0, 1fr));
  min-height: max(650px, calc(100svh - 118px));
  padding: clamp(3.5rem, 8vh, 7rem) var(--gutter) clamp(2.5rem, 5vh, 4.5rem);
  border-inline: var(--rule);
  border-bottom: var(--rule);
}

.hero-copy {
  display: flex;
  grid-column: span 5;
  flex-direction: column;
  align-items: flex-start;
  justify-content: center;
  padding-right: 1rem;
}

.section-number {
  margin: 0 0 1rem;
}

h1,
h2,
p {
  margin-top: 0;
}

h1,
h2 {
  font-family: var(--font-display);
  font-weight: 400;
  text-transform: uppercase;
}

h1 {
  width: 119%;
  max-width: none;
  margin-bottom: 1.5rem;
  font-size: clamp(4.8rem, 9.4vw, 9.7rem);
  line-height: 0.79;
  letter-spacing: -0.075em;
  transform: scaleX(0.84);
  transform-origin: left center;
}

h2 {
  margin-bottom: clamp(1.5rem, 3vw, 3rem);
  font-size: clamp(2.35rem, 5vw, 5.25rem);
  line-height: 0.9;
  letter-spacing: -0.055em;
}

.hero-thesis {
  margin-bottom: 0.6rem;
  font-size: clamp(1.35rem, 2.2vw, 2.1rem);
  font-weight: 600;
  line-height: 1.1;
}

.hero-copy > p:last-of-type {
  max-width: 31rem;
  margin-bottom: 2rem;
}

.primary-action {
  display: inline-flex;
  align-items: center;
  justify-content: space-between;
  gap: 2rem;
  padding: 1rem 1.15rem;
  color: var(--paper);
  background: var(--signal-blue);
  border: var(--rule);
  font-family: var(--font-utility);
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.035em;
  text-decoration: none;
  text-transform: uppercase;
}

.primary-action:hover {
  color: var(--signal-blue);
  background: var(--paper);
}

.gate-demo {
  position: relative;
  display: flex;
  grid-column: span 7;
  flex-direction: column;
  justify-content: center;
  min-height: 26rem;
  padding: clamp(2rem, 4vw, 4rem);
  overflow: hidden;
  background: var(--paper);
  border: var(--rule);
  isolation: isolate;
}

.gate-demo::before {
  position: absolute;
  z-index: 0;
  top: 20%;
  left: 49%;
  width: 4.5rem;
  height: 62%;
  border-inline: 0.85rem solid var(--ink);
  content: "";
  transform: translateX(-50%);
}

.gate-demo::after {
  position: absolute;
  z-index: 0;
  top: 37%;
  left: 49%;
  width: 5.25rem;
  height: 1rem;
  background: var(--hazard-orange);
  content: "";
  transform: translateX(-50%) translateY(0);
  transition:
    transform 480ms cubic-bezier(0.2, 0.8, 0.2, 1),
    background-color 180ms linear;
}

.gate-demo > * {
  position: relative;
  z-index: 1;
}

.gate-door {
  transform: translateY(0);
  transition: transform 480ms cubic-bezier(0.2, 0.8, 0.2, 1);
}

.gate-demo[data-mode="authenticated"] .gate-door {
  transform: translateY(-5.5rem);
}

.gate-demo[data-mode="authenticated"]::after {
  background: var(--signal-blue);
  transform: translateX(-50%) translateY(-5.5rem);
}

.request-path {
  position: relative;
  display: grid;
  grid-template-columns: 1fr auto 1fr auto 1fr;
  align-items: center;
  gap: 0.65rem;
  margin-block: auto;
  padding-block: 2.5rem;
  border-block: 1px solid var(--steel);
  font-family: var(--font-utility);
  font-size: clamp(0.65rem, 1.05vw, 0.9rem);
  font-weight: 600;
  text-align: center;
}

.request-path::before {
  position: absolute;
  top: calc(50% - 0.35rem);
  left: 22%;
  width: 0.7rem;
  height: 0.7rem;
  background: var(--hazard-orange);
  border: 2px solid var(--ink);
  content: "";
  transition:
    left 480ms cubic-bezier(0.2, 0.8, 0.2, 1),
    background-color 180ms linear;
}

.gate-demo[data-mode="authenticated"] .request-path::before {
  left: 82%;
  background: var(--signal-blue);
}

[data-gate-status] {
  align-self: flex-start;
  margin: 1.5rem 0;
  padding: 0.45rem 0.65rem;
  color: var(--ink);
  background: var(--hazard-orange);
  font-family: var(--font-utility);
  font-size: 0.8rem;
  font-weight: 600;
  text-transform: uppercase;
}

.gate-demo[data-mode="authenticated"] [data-gate-status] {
  color: var(--paper);
  background: var(--signal-blue);
}

.gate-modes {
  display: grid;
  grid-template-columns: 1fr 1fr;
  margin: 0;
  padding: 0;
  border: var(--rule);
}

.gate-modes legend {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip-path: inset(50%);
  white-space: nowrap;
}

.gate-modes button {
  padding: 0.85rem 0.65rem;
  background: var(--paper);
  border: 0;
  text-transform: uppercase;
}

.gate-modes button + button {
  border-left: var(--rule);
}

.gate-modes button[aria-pressed="true"] {
  color: var(--ink);
  background: var(--hazard-orange);
}

.gate-demo[data-mode="authenticated"] .gate-modes button[aria-pressed="true"] {
  color: var(--paper);
  background: var(--signal-blue);
}

main > section:not(.hero) {
  padding: clamp(4.5rem, 9vw, 8rem) var(--gutter);
  border-inline: var(--rule);
  border-bottom: var(--rule);
}

#setup {
  display: grid;
  grid-template-columns: repeat(12, minmax(0, 1fr));
  column-gap: var(--gutter);
  background: var(--paper);
}

#setup .section-number,
#setup h2,
#setup > p {
  grid-column: 1 / span 5;
}

#setup h2 {
  grid-row: 2;
}

#setup > p {
  grid-row: 3;
  max-width: 34rem;
}

.setup-block {
  grid-column: 7 / -1;
  grid-row: 1 / span 4;
  align-self: center;
  color: var(--paper);
  background: var(--ink);
  border: var(--rule);
}

.code-heading {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.8rem 1rem;
  border-bottom: 1px solid var(--steel);
}

.code-heading button {
  padding: 0.4rem 0.65rem;
  color: var(--ink);
  background: var(--paper);
  border: 0;
  font-family: var(--font-utility);
  font-size: 0.72rem;
  font-weight: 600;
  text-transform: uppercase;
}

pre {
  max-width: 100%;
  margin: 0;
  padding: clamp(1rem, 3vw, 2rem);
  overflow-x: auto;
  font: 500 0.84rem / 1.8 var(--font-utility);
  white-space: pre;
}

code {
  font-family: var(--font-utility);
  font-size: 0.9em;
}

#how-it-works {
  background: var(--cold-canvas);
}

#how-it-works ol {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  margin: 0;
  padding: 0;
  border-top: var(--rule);
  list-style: none;
  counter-reset: gate-step;
}

#how-it-works li {
  position: relative;
  padding: 4.5rem clamp(1rem, 2.5vw, 2.5rem) 1.5rem 0;
  counter-increment: gate-step;
}

#how-it-works li:not(:last-child) {
  border-right: var(--rule);
}

#how-it-works li:not(:first-child) {
  padding-left: clamp(1rem, 2.5vw, 2.5rem);
}

#how-it-works li::before {
  position: absolute;
  top: 0.8rem;
  left: 0;
  content: "0" counter(gate-step);
  font-family: var(--font-utility);
  font-size: 0.75rem;
  font-weight: 600;
}

#how-it-works li:not(:first-child)::before {
  left: clamp(1rem, 2.5vw, 2.5rem);
}

#how-it-works strong {
  display: block;
  margin-bottom: 0.65rem;
  font-size: 1.2rem;
}

#security {
  background: var(--paper);
}

#security dl {
  margin: 0 0 2rem;
  border-top: var(--rule);
}

#security dl > div {
  display: grid;
  grid-template-columns: 3fr 9fr;
  border-bottom: 1px solid var(--ink);
}

#security dt,
#security dd {
  margin: 0;
  padding: 1rem 0;
}

#security dt {
  font-family: var(--font-utility);
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

#security dd {
  padding-left: var(--gutter);
  border-left: 1px solid var(--ink);
}

#deploy {
  display: grid;
  grid-template-columns: repeat(12, minmax(0, 1fr));
  gap: 0 var(--gutter);
}

#deploy .section-number,
#deploy h2 {
  grid-column: 1 / span 6;
}

#deploy > p {
  grid-column: 7 / -1;
  margin: 0;
  padding: 1rem 0;
  border-top: 1px solid var(--ink);
}

#deploy > p:last-child {
  border-bottom: 1px solid var(--ink);
}

#limits {
  color: var(--paper);
  background: var(--ink);
}

#limits h2 {
  max-width: 12ch;
}

#limits > p:last-child {
  max-width: 62rem;
  margin-bottom: 0;
  font-size: clamp(1.15rem, 2.2vw, 1.75rem);
}

.final-action {
  display: grid;
  grid-template-columns: repeat(12, minmax(0, 1fr));
  align-items: end;
  gap: 1.5rem var(--gutter);
  color: var(--paper);
  background: var(--signal-blue);
}

.final-action .section-number,
.final-action h2 {
  grid-column: 1 / span 8;
}

.final-action .primary-action,
.final-action > [data-source-link] {
  grid-column: 9 / -1;
}

.final-action .primary-action {
  color: var(--ink);
  background: var(--paper);
}

footer {
  display: grid;
  grid-template-columns: 1fr auto;
  align-items: center;
  gap: 2rem;
  padding: 2rem var(--gutter);
  color: var(--paper);
  background: var(--ink);
  border-inline: var(--rule);
}

footer p {
  margin: 0;
  font-family: var(--font-display);
  font-size: 1.15rem;
  text-transform: uppercase;
}

footer ul {
  display: flex;
  gap: 1.5rem;
  margin: 0;
  padding: 0;
  list-style: none;
}

@media (max-width: 760px) {
  nav,
  .hero,
  #setup,
  #deploy,
  .final-action {
    grid-template-columns: 1fr;
  }

  .brand,
  .nav-links,
  .hero-copy,
  .gate-demo,
  #setup .section-number,
  #setup h2,
  #setup > p,
  .setup-block,
  #deploy .section-number,
  #deploy h2,
  #deploy > p,
  .final-action .section-number,
  .final-action h2,
  .final-action .primary-action,
  .final-action > [data-source-link] {
    grid-column: 1;
    grid-row: auto;
  }

  nav {
    min-height: auto;
  }

  .brand {
    min-height: 3.5rem;
    border-right: 0;
    border-bottom: var(--rule);
  }

  .nav-links {
    justify-content: flex-start;
    min-height: 3.5rem;
  }

  .hero {
    gap: 3rem;
    min-height: 0;
  }

  .hero-copy {
    padding-right: 0;
  }

  .gate-demo {
    min-height: 24rem;
  }

  .setup-block {
    margin-top: 2rem;
  }

  #how-it-works ol {
    grid-template-columns: 1fr;
    border-bottom: var(--rule);
  }

  #how-it-works li,
  #how-it-works li:not(:first-child) {
    padding: 3.5rem 0 1.5rem;
    border-right: 0;
    border-bottom: 1px solid var(--ink);
  }

  #how-it-works li:last-child {
    border-bottom: 0;
  }

  #how-it-works li:not(:first-child)::before {
    left: 0;
  }

  #security dl > div {
    grid-template-columns: 1fr;
  }

  #security dd {
    padding-top: 0;
    padding-left: 0;
    border-left: 0;
  }

  footer {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 480px) {
  h1 {
    font-size: clamp(3.35rem, 17vw, 5rem);
  }

  .nav-links a:not([data-source-link]) {
    display: none;
  }

  .nav-links::before {
    content: "SECTIONS / SCROLL";
  }

  .hero,
  main > section:not(.hero) {
    padding-block: 3.5rem;
  }

  .primary-action {
    width: 100%;
  }

  .gate-demo {
    min-height: 20rem;
    padding: 1rem;
  }

  .request-path {
    gap: 0.25rem;
    font-size: 0.58rem;
  }

  .gate-modes {
    grid-template-columns: 1fr;
  }

  .gate-modes button + button {
    border-top: var(--rule);
    border-left: 0;
  }

  pre {
    overflow-x: auto;
    font-size: 0.72rem;
  }

  footer ul {
    flex-wrap: wrap;
  }
}

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

  *,
  *::before,
  *::after {
    animation-duration: 0.01ms;
    animation-iteration-count: 1;
  }

  .gate-demo::after,
  .gate-door,
  .request-path::before {
    transition-duration: 0.01ms;
  }
}