@font-face {
  font-family: "IBM Plex Sans";
  font-style: normal;
  font-weight: 100 700;
  font-display: swap;
  src: url("/fonts/ibm-plex-sans-latin-wght-normal.woff2") format("woff2-variations");
}

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

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

:root {
  --blueprint: #243bfd;
  --blueprint-dark: #1728ca;
  --ink: #132238;
  --steel: #607089;
  --field: #f4f7fb;
  --paper: #ffffff;
  --signal: #f15a3a;
  --line: #cfd8e5;
  --line-strong: #9eacc0;
  --shadow: 0 24px 70px rgb(27 48 86 / 12%);
  color: var(--ink);
  background: var(--field);
  font-family: "IBM Plex Sans", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-synthesis: none;
  text-rendering: optimizeLegibility;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  min-width: 320px;
  margin: 0;
  background:
    linear-gradient(rgb(36 59 253 / 4%) 1px, transparent 1px),
    linear-gradient(90deg, rgb(36 59 253 / 4%) 1px, transparent 1px),
    var(--field);
  background-size: 32px 32px;
  color: var(--ink);
}

a {
  color: inherit;
}

.page-shell {
  width: min(1180px, calc(100% - 48px));
  margin: 0 auto;
}

.site-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 92px;
  border-bottom: 1px solid var(--line);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  color: var(--ink);
  font-weight: 600;
  text-decoration: none;
}

.brand-mark {
  display: grid;
  width: 38px;
  height: 38px;
  place-items: center;
  border: 2px solid var(--blueprint);
  color: var(--blueprint);
  font-family: "IBM Plex Mono", monospace;
  font-size: 11px;
  font-weight: 600;
  letter-spacing: -0.08em;
  position: relative;
}

.brand-mark::before,
.brand-mark::after {
  position: absolute;
  width: 8px;
  height: 8px;
  content: "";
}

.brand-mark::before {
  top: -2px;
  left: -2px;
  border-top: 3px solid var(--paper);
  border-left: 3px solid var(--paper);
}

.brand-mark::after {
  right: -2px;
  bottom: -2px;
  border-right: 3px solid var(--paper);
  border-bottom: 3px solid var(--paper);
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 28px;
}

.draft-badge,
.utility-label,
.eyebrow,
.provider,
.node-kicker,
.error-code {
  font-family: "IBM Plex Mono", monospace;
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.draft-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: var(--steel);
}

.draft-badge span {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--signal);
  box-shadow: 0 0 0 4px rgb(241 90 58 / 12%);
}

.text-link {
  color: var(--ink);
  font-size: 0.92rem;
  font-weight: 600;
  text-decoration: none;
}

.text-link:hover {
  color: var(--blueprint);
}

.hero {
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(420px, 0.95fr);
  gap: clamp(48px, 8vw, 112px);
  align-items: center;
  min-height: 710px;
  padding: 96px 0 110px;
}

.eyebrow {
  margin: 0 0 22px;
  color: var(--blueprint);
}

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

h1 {
  max-width: 760px;
  margin-bottom: 28px;
  font-size: clamp(3rem, 6vw, 5.55rem);
  font-weight: 600;
  letter-spacing: -0.055em;
  line-height: 0.98;
}

h2 {
  margin-bottom: 20px;
  font-size: clamp(2rem, 3.5vw, 3.4rem);
  font-weight: 600;
  letter-spacing: -0.04em;
  line-height: 1.04;
}

.hero-definition {
  max-width: 640px;
  margin-bottom: 14px;
  font-size: clamp(1.2rem, 2vw, 1.55rem);
  font-weight: 500;
  line-height: 1.45;
}

.hero-support,
.section-heading > p:last-child,
.closing > p:not(.eyebrow) {
  max-width: 660px;
  color: var(--steel);
  font-size: 1.05rem;
  line-height: 1.7;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 34px;
}

.button {
  display: inline-flex;
  min-height: 48px;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 0 20px;
  border: 1px solid var(--ink);
  color: var(--ink);
  font-size: 0.94rem;
  font-weight: 600;
  text-decoration: none;
  transition: transform 160ms ease, box-shadow 160ms ease, background-color 160ms ease;
}

.button:hover {
  transform: translateY(-2px);
}

.button-primary {
  border-color: var(--blueprint);
  background: var(--blueprint);
  color: var(--paper);
  box-shadow: 5px 5px 0 var(--ink);
}

.button-primary:hover {
  background: var(--blueprint-dark);
  box-shadow: 7px 7px 0 var(--ink);
}

.button-secondary {
  background: rgb(255 255 255 / 65%);
}

.button-secondary:hover {
  background: var(--paper);
}

.token-card {
  position: relative;
  overflow: hidden;
  border: 1px solid var(--line-strong);
  background: var(--paper);
  box-shadow: var(--shadow);
}

.token-card::before {
  position: absolute;
  top: 0;
  bottom: 0;
  left: 0;
  width: 4px;
  background: var(--blueprint);
  content: "";
}

.token-card-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 16px;
  padding: 26px 28px 24px 32px;
  border-bottom: 1px solid var(--line);
}

.utility-label {
  margin-bottom: 9px;
  color: var(--steel);
}

.token-card h2 {
  margin: 0;
  font-family: "IBM Plex Mono", monospace;
  font-size: clamp(1rem, 1.7vw, 1.25rem);
  letter-spacing: -0.02em;
}

.token-state {
  padding: 5px 8px;
  border: 1px solid rgb(36 59 253 / 30%);
  background: rgb(36 59 253 / 7%);
  color: var(--blueprint);
  font-family: "IBM Plex Mono", monospace;
  font-size: 0.68rem;
}

pre {
  overflow-x: auto;
  margin: 0;
  padding: 30px 32px 34px;
  color: #35445a;
  font-family: "IBM Plex Mono", monospace;
  font-size: clamp(0.78rem, 1.15vw, 0.9rem);
  line-height: 1.75;
  tab-size: 2;
}

.code-key {
  color: var(--blueprint);
  font-weight: 600;
}

.code-value {
  color: var(--signal);
}

.mapping-section {
  padding: 116px 0 124px;
  border-top: 1px solid var(--line);
}

.section-heading {
  max-width: 760px;
  margin-bottom: 68px;
}

.section-heading.compact {
  margin-bottom: 0;
}

.mapping-diagram {
  display: grid;
  grid-template-columns: minmax(210px, 0.8fr) minmax(80px, 0.35fr) minmax(0, 1.8fr);
  align-items: center;
}

.semantic-node {
  position: relative;
  padding: 28px;
  border: 2px solid var(--blueprint);
  background: var(--paper);
  box-shadow: 7px 7px 0 rgb(36 59 253 / 13%);
}

.semantic-node::after {
  position: absolute;
  top: 50%;
  right: -7px;
  width: 12px;
  height: 12px;
  border: 2px solid var(--blueprint);
  border-radius: 50%;
  background: var(--paper);
  content: "";
  transform: translate(50%, -50%);
}

.node-kicker {
  display: block;
  margin-bottom: 14px;
  color: var(--blueprint);
}

.semantic-node strong {
  display: block;
  margin-bottom: 7px;
  font-size: 1.45rem;
}

.semantic-node code {
  color: var(--steel);
  font-family: "IBM Plex Mono", monospace;
  font-size: 0.78rem;
}

.mapping-rail {
  height: 2px;
  background: var(--blueprint);
  position: relative;
}

.mapping-rail span {
  position: absolute;
  top: 50%;
  right: -1px;
  width: 8px;
  height: 8px;
  border-top: 2px solid var(--blueprint);
  border-right: 2px solid var(--blueprint);
  transform: translateY(-50%) rotate(45deg);
}

.mapping-targets {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.mapping-targets li {
  min-height: 128px;
  padding: 24px;
  border: 1px solid var(--line);
  background: rgb(255 255 255 / 70%);
}

.mapping-targets li:first-child {
  border-left-color: var(--blueprint);
}

.provider {
  display: block;
  min-height: 30px;
  margin-bottom: 14px;
  color: var(--steel);
}

.mapping-targets strong {
  font-size: 1.08rem;
}

.principles {
  display: grid;
  grid-template-columns: minmax(0, 0.8fr) minmax(440px, 1.2fr);
  gap: 72px;
  padding: 116px 0;
  border-top: 1px solid var(--line);
}

.principle-list {
  margin: 0;
  padding: 0;
  list-style: none;
}

.principle-list li {
  display: grid;
  grid-template-columns: 48px 1fr;
  gap: 20px;
  padding: 28px 0;
  border-top: 1px solid var(--line);
}

.principle-list li:last-child {
  border-bottom: 1px solid var(--line);
}

.principle-index {
  color: var(--blueprint);
  font-family: "IBM Plex Mono", monospace;
  font-size: 0.72rem;
  font-weight: 600;
}

.principle-list strong {
  font-size: 1.08rem;
}

.principle-list p {
  margin: 7px 0 0;
  color: var(--steel);
  line-height: 1.55;
}

.closing {
  margin-bottom: 72px;
  padding: clamp(42px, 7vw, 82px);
  border: 1px solid var(--ink);
  background: var(--ink);
  color: var(--paper);
  position: relative;
  overflow: hidden;
}

.closing::after {
  position: absolute;
  right: -95px;
  bottom: -170px;
  width: 360px;
  height: 360px;
  border: 44px solid rgb(36 59 253 / 55%);
  border-radius: 50%;
  content: "";
}

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

.closing .eyebrow {
  color: #9aa6ff;
}

.closing h2 {
  max-width: 690px;
}

.closing > p:not(.eyebrow) {
  color: #bdc8d8;
}

.closing .button {
  margin-top: 20px;
  border-color: var(--paper);
  background: var(--paper);
  color: var(--ink);
  box-shadow: 5px 5px 0 var(--blueprint);
}

footer {
  display: grid;
  grid-template-columns: 1fr auto auto;
  gap: 28px;
  align-items: center;
  min-height: 96px;
  border-top: 1px solid var(--line);
  color: var(--steel);
  font-size: 0.85rem;
}

footer span:first-child {
  color: var(--ink);
  font-weight: 600;
}

footer a:hover {
  color: var(--blueprint);
}

.error-page {
  display: grid;
  min-height: 100vh;
  place-items: center;
  padding: 24px;
}

.error-card {
  width: min(700px, 100%);
  padding: clamp(36px, 8vw, 72px);
  border: 1px solid var(--line-strong);
  background: var(--paper);
  box-shadow: var(--shadow);
}

.error-card .brand {
  margin-bottom: 72px;
}

.error-code {
  margin-bottom: 18px;
  color: var(--signal);
}

.error-card h1 {
  margin-bottom: 20px;
  font-size: clamp(2.4rem, 7vw, 4.5rem);
}

.error-card > p:not(.error-code) {
  max-width: 510px;
  margin-bottom: 34px;
  color: var(--steel);
  font-size: 1.05rem;
  line-height: 1.65;
}

a:focus-visible {
  outline: 3px solid var(--signal);
  outline-offset: 4px;
}

.reveal {
  animation: reveal 620ms both cubic-bezier(0.2, 0.8, 0.2, 1);
}

.reveal-two {
  animation-delay: 100ms;
}

.reveal-three {
  animation-delay: 180ms;
}

@keyframes reveal {
  from {
    opacity: 0;
    transform: translateY(18px);
  }

  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@media (max-width: 920px) {
  .hero {
    grid-template-columns: 1fr;
    min-height: auto;
    padding: 80px 0 96px;
  }

  .token-card {
    max-width: 650px;
  }

  .mapping-diagram {
    grid-template-columns: 1fr;
    max-width: 650px;
  }

  .semantic-node::after {
    top: auto;
    right: 50%;
    bottom: -7px;
    transform: translate(50%, 50%);
  }

  .mapping-rail {
    width: 2px;
    height: 52px;
    margin-left: 50%;
  }

  .mapping-rail span {
    top: auto;
    right: auto;
    bottom: 0;
    left: 50%;
    transform: translate(-50%, 0) rotate(135deg);
  }

  .principles {
    grid-template-columns: 1fr;
    gap: 32px;
  }
}

@media (max-width: 620px) {
  .page-shell {
    width: min(100% - 32px, 1180px);
  }

  .site-header {
    min-height: 76px;
  }

  .brand > span:last-child,
  .header-actions .draft-badge {
    display: none;
  }

  .hero {
    gap: 52px;
    padding: 64px 0 80px;
  }

  h1 {
    font-size: clamp(2.8rem, 15vw, 4.2rem);
  }

  .hero-actions {
    align-items: stretch;
    flex-direction: column;
  }

  .button {
    width: 100%;
  }

  .token-card-header,
  pre {
    padding-right: 20px;
    padding-left: 24px;
  }

  .mapping-section,
  .principles {
    padding: 88px 0;
  }

  .mapping-targets {
    grid-template-columns: 1fr;
  }

  .mapping-targets li {
    min-height: auto;
  }

  .closing {
    margin-right: -16px;
    margin-left: -16px;
  }

  footer {
    grid-template-columns: 1fr;
    gap: 10px;
    padding: 30px 0;
  }
}

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

  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}