:root {
  color-scheme: light;
  --ink: #172c38;
  --muted: #47616e;
  --blue: #006d93;
  --line: #d5e1e7;
  --soft: #f3f7f9;
  --navy: #102d3b;
  --radius: 16px;
  font-family:
    system-ui,
    -apple-system,
    BlinkMacSystemFont,
    "Segoe UI",
    sans-serif;
  color: var(--ink);
  background: #fff;
  font-synthesis: none;
  scrollbar-color: #849eab var(--soft);
}
* {
  box-sizing: border-box;
}
body {
  margin: 0;
  font-size: 16px;
  line-height: 1.65;
}
::selection {
  background: #c5ecfa;
  color: #102d3b;
}
a {
  color: var(--blue);
  text-underline-offset: 0.22em;
}
a:hover {
  text-decoration-thickness: 2px;
  color: #004a66;
}
button,
a,
summary {
  touch-action: manipulation;
  -webkit-tap-highlight-color: #c5ecfa;
}
a:focus-visible,
button:focus-visible,
summary:focus-visible {
  outline: 3px solid #1689bc;
  outline-offset: 5px;
}
button {
  font: inherit;
  cursor: pointer;
}
p {
  margin: 0 0 1.2em;
  max-width: 72ch;
}
h1,
h2,
h3 {
  line-height: 1.15;
  text-wrap: balance;
}
h1 {
  font-size: clamp(3rem, 5.6vw, 5.3rem);
  font-weight: 650;
  letter-spacing: -0.04em;
  margin: 0 0 26px;
}
h2 {
  font-size: clamp(1.8rem, 3vw, 2.7rem);
  letter-spacing: -0.03em;
  font-weight: 650;
  margin: 0 0 22px;
}
h3 {
  font-size: 1.15rem;
  letter-spacing: -0.015em;
  margin: 0 0 12px;
}
h3:not(:first-child) {
  margin-top: 28px;
}
.wrap {
  width: min(1180px, calc(100% - 80px));
  margin-inline: auto;
}
.header {
  min-height: 100px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 28px;
  border-bottom: 1px solid var(--line);
}
.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  color: var(--ink);
  font-size: 1.22rem;
  font-weight: 700;
  text-decoration: none;
  white-space: nowrap;
}
.brand svg {
  fill: none;
  stroke: var(--blue);
  stroke-width: 2;
  stroke-linecap: round;
  stroke-linejoin: round;
}
.header nav {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 28px;
}
.header nav a {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  font-size: 0.92rem;
  font-weight: 550;
  text-decoration: none;
  color: var(--muted);
}
.header nav a:hover {
  color: var(--blue);
  text-decoration: underline;
}
.skip {
  position: absolute;
  left: 20px;
  top: 10px;
  z-index: 20;
  background: #fff;
  padding: 12px;
  transform: translateY(-150%);
}
.skip:focus {
  transform: translateY(0);
}
.hero {
  display: grid;
  grid-template-columns: 1.12fr 1fr;
  gap: 78px;
  padding-block: 78px 84px;
  align-items: center;
}
.intro > p {
  color: var(--muted);
}
.lead {
  font-size: 1.24rem;
  line-height: 1.6;
}
.actions {
  display: flex;
  gap: 22px;
  align-items: center;
  flex-wrap: wrap;
  margin-top: 30px;
}
.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 20px;
  padding: 13px 21px;
  border-radius: 8px;
  font-size: 0.96rem;
  font-weight: 600;
  text-decoration: none;
  min-height: 48px;
}
.primary {
  color: #fff;
  background: var(--blue);
}
.primary:hover {
  color: #fff;
  background: #005777;
}
.text-link {
  font-size: 0.94rem;
  font-weight: 600;
}
.preview {
  display: flex;
  align-items: center;
  gap: 9px;
  font-size: 0.8rem;
  margin-top: 26px !important;
  margin-bottom: 0;
  flex-wrap: wrap;
}
.status-dot {
  height: 7px;
  width: 7px;
  border-radius: 50%;
  background: var(--blue);
}
.flow-demo {
  background: var(--navy);
  color: #f2f9fc;
  border-radius: var(--radius);
  padding: 28px;
}
.demo-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 22px;
}
.demo-top h2 {
  font-size: 1.05rem;
  letter-spacing: 0;
  margin: 0;
}
.demo-top > span {
  font-size: 0.72rem;
  color: #b6d3e0;
}
.example-controls {
  display: flex;
  gap: 5px;
  border-bottom: 1px solid #49636e;
  padding-bottom: 12px;
}
.example-controls button {
  flex: 1;
  min-height: 40px;
  background: transparent;
  color: #c2dce8;
  border: 1px solid transparent;
  border-radius: 7px;
  padding: 7px 10px;
  font-size: 0.82rem;
  font-weight: 600;
}
.example-controls button[aria-pressed="true"] {
  background: #21495b;
  color: #fff;
  border-color: #638797;
}
.example-controls button:hover {
  background: #28566c;
  color: #fff;
}
.flow-demo button:focus-visible {
  outline-color: #9fddf7;
}
.request {
  font-size: 1.3rem;
  font-weight: 550;
  line-height: 1.4;
  margin: 24px 0;
  min-height: 3em;
  text-wrap: balance;
}
.route {
  list-style: none;
  padding: 0;
  margin: 0;
}
.route li {
  position: relative;
  display: flex;
  gap: 16px;
  padding-bottom: 22px;
}
.route li:not(:last-child)::after {
  content: "";
  position: absolute;
  top: 17px;
  left: 5px;
  width: 1px;
  height: calc(100% - 18px);
  background: #557788;
}
.route-dot {
  width: 11px;
  height: 11px;
  background: #9adcf3;
  border-radius: 50%;
  flex: none;
  margin-top: 7px;
}
.route strong {
  font-size: 0.9rem;
  font-weight: 600;
}
.route p {
  color: #bbd4df;
  font-size: 0.84rem;
  line-height: 1.5;
  margin: 3px 0 0;
}
.reply {
  background: #1d4354;
  padding: 17px 20px;
  border-radius: 10px;
}
.reply span {
  font-size: 0.74rem;
  color: #bbd4df;
}
.reply p {
  font-size: 1rem;
  margin: 4px 0 0;
}
.demo-note {
  font-size: 0.73rem;
  line-height: 1.6;
  color: #b6d3e0;
  margin: 18px 0 0;
}
.facts-band {
  background: var(--soft);
  border-block: 1px solid var(--line);
}
.facts {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 30px;
  padding-block: 26px;
}
.facts dt {
  font-size: 0.78rem;
  color: var(--muted);
  margin-bottom: 4px;
}
.facts dd {
  font-size: 0.88rem;
  font-weight: 600;
  margin: 0;
}
.section {
  padding-block: 85px;
  border-bottom: 1px solid var(--line);
  scroll-margin-top: 30px;
}
.split {
  display: grid;
  grid-template-columns: 1fr 1.6fr;
  gap: 90px;
}
.section-heading p {
  color: var(--muted);
}
.wide {
  max-width: 740px;
}
.notice {
  background: var(--soft);
  border-radius: 12px;
  padding: 24px;
  margin-bottom: 28px;
}
.notice p {
  font-size: 0.92rem;
  margin-bottom: 0;
  color: var(--muted);
}
.installation {
  padding-left: 26px;
  margin: 0;
}
.installation > li {
  padding: 0 0 30px 14px;
}
.installation > li::marker {
  color: var(--blue);
  font-weight: 650;
  font-size: 1.1rem;
}
.installation p {
  font-size: 0.95rem;
}
code {
  font-family: ui-monospace, SFMono-Regular, Consolas, monospace;
  background: var(--soft);
  border-radius: 4px;
  padding: 2px 4px;
  overflow-wrap: anywhere;
  font-size: 0.85em;
}
pre {
  padding: 20px;
  background: var(--soft);
  border-radius: 10px;
  overflow: auto;
  line-height: 1.65;
  margin-block: 16px;
}
pre code {
  padding: 0;
  background: none;
  font-size: 0.8rem;
  overflow-wrap: normal;
}
.small {
  font-size: 0.84rem !important;
  color: var(--muted);
}
details {
  border-bottom: 1px solid var(--line);
  padding: 0 0 16px;
  margin-bottom: 16px;
}
summary {
  cursor: pointer;
  min-height: 44px;
  padding: 10px 20px 8px 0;
  font-weight: 600;
  font-size: 0.95rem;
}
summary:hover {
  color: var(--blue);
}
details p {
  font-size: 0.93rem;
  margin: 12px 0;
  color: var(--muted);
}
.hacs-note {
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 10px 22px;
}
.architecture {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  margin-top: 40px;
}
.architecture article p {
  color: var(--muted);
  font-size: 0.95rem;
}
.table-scroll {
  overflow-x: auto;
  margin-top: 28px;
}
table {
  border-collapse: collapse;
  width: 100%;
  text-align: left;
  font-size: 0.9rem;
}
caption {
  text-align: left;
  font-size: 1rem;
  font-weight: 650;
  margin-bottom: 16px;
}
th,
td {
  padding: 16px;
  border-bottom: 1px solid var(--line);
  vertical-align: top;
}
thead {
  background: var(--soft);
}
tbody th {
  font-weight: 500;
  width: 48%;
}
td {
  color: var(--muted);
}
.privacy {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 68px;
}
.privacy p {
  color: var(--muted);
}
.boundaries {
  padding-left: 30px;
  border-left: 1px solid var(--line);
  font-size: 0.94rem;
}
.boundaries ul {
  padding-left: 20px;
  margin: 0 0 22px;
}
.boundaries li {
  margin-bottom: 12px;
}
.closing {
  text-align: center;
  padding: 75px 0;
}
.closing p {
  margin: 0 auto 24px;
  color: var(--muted);
}
.footer {
  border-top: 1px solid var(--line);
  padding-block: 40px;
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 20px 40px;
  font-size: 0.84rem;
}
.footer strong {
  font-size: 1rem;
}
.footer p {
  margin: 8px 0 0;
  color: var(--muted);
}
.footer nav {
  display: flex;
  flex-wrap: wrap;
  align-content: flex-start;
  gap: 12px 24px;
}
.footer nav a {
  min-height: 44px;
  display: flex;
  align-items: center;
}
.footer .site-note {
  width: 100%;
  font-size: 0.76rem;
}
html {
  scroll-behavior: smooth;
}
#main {
  scroll-margin-top: 20px;
}
@media (max-width: 1000px) {
  .hero {
    gap: 40px;
  }
  .split {
    gap: 48px;
  }
  .wrap {
    width: calc(100% - 48px);
  }
  .header nav {
    gap: 10px 18px;
  }
  .facts {
    grid-template-columns: repeat(2, 1fr);
    gap: 18px;
  }
  .privacy {
    gap: 34px;
  }
}
@media (max-width: 720px) {
  .wrap {
    width: calc(100% - 36px);
  }
  .header {
    padding-block: 20px;
    align-items: flex-start;
    flex-direction: column;
    gap: 10px;
  }
  .header nav {
    gap: 4px 24px;
  }
  .hero {
    grid-template-columns: 1fr;
    gap: 38px;
    padding-block: 46px;
  }
  .intro {
    max-width: 550px;
  }
  h1 {
    font-size: 3.5rem;
  }
  .flow-demo {
    padding: 24px;
  }
  .request {
    min-height: 0;
  }
  .split,
  .privacy,
  .architecture {
    grid-template-columns: 1fr;
    gap: 28px;
  }
  .section {
    padding-block: 54px;
  }
  .section-heading h2 br {
    display: none;
  }
  .boundaries {
    padding-left: 0;
    border-left: 0;
    border-top: 1px solid var(--line);
    padding-top: 28px;
  }
  .facts {
    gap: 22px 16px;
  }
  .facts dd {
    font-size: 0.82rem;
  }
  .facts dt {
    font-size: 0.75rem;
  }
  .lead {
    font-size: 1.15rem;
  }
  .architecture {
    margin-top: 28px;
  }
  th,
  td {
    padding: 12px 10px;
  }
  .closing {
    padding-block: 52px;
  }
  .footer {
    padding-bottom: max(30px, env(safe-area-inset-bottom));
  }
  .footer nav {
    gap: 8px 20px;
  }
  .installation > li {
    padding-left: 6px;
  }
  .actions {
    gap: 18px;
  }
  .button {
    padding-inline: 18px;
  }
}
@media (max-width: 360px) {
  h1 {
    font-size: 3rem;
  }
  .header nav {
    gap: 4px 17px;
  }
  .flow-demo {
    padding: 20px;
  }
  .facts {
    grid-template-columns: 1fr;
  }
  .example-controls button {
    padding-inline: 5px;
  }
}
@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
}

/* Keep grid content shrinkable when readers enlarge text. */
.hero > *,
.split > *,
.privacy > *,
.architecture > *,
.facts > *,
.route li > div {
  min-width: 0;
}
.demo-note,
.demo-top > span,
.reply span,
.preview,
.facts dt,
.footer .site-note {
  font-size: 0.875rem;
}
[hidden] {
  display: none !important;
}