:root {
  color-scheme: dark;
  --ink: #ecfff8;
  --ink-muted: #99b8ad;
  --ink-faint: #68857c;
  --ground: #07110f;
  --ground-raised: #0a1714;
  --line: rgba(178, 255, 228, 0.15);
  --line-strong: rgba(178, 255, 228, 0.28);
  --signal: #8df7ce;
  --signal-bright: #c5ffe9;
  --blue: #4bb7ff;
  --mono: "SFMono-Regular", "Cascadia Code", "Roboto Mono", Consolas, monospace;
  --sans: Inter, ui-sans-serif, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --page: min(1180px, calc(100vw - 48px));
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  min-width: 320px;
  margin: 0;
  color: var(--ink);
  background:
    radial-gradient(circle at 73% 14%, rgba(52, 181, 142, 0.1), transparent 29rem),
    radial-gradient(circle at 16% 44%, rgba(75, 183, 255, 0.055), transparent 25rem),
    var(--ground);
  font-family: var(--sans);
  font-size: 1rem;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

body::before {
  position: fixed;
  inset: 0;
  z-index: -1;
  background-image:
    linear-gradient(rgba(141, 247, 206, 0.025) 1px, transparent 1px),
    linear-gradient(90deg, rgba(141, 247, 206, 0.025) 1px, transparent 1px);
  background-size: 48px 48px;
  content: "";
  pointer-events: none;
  mask-image: linear-gradient(to bottom, black, transparent 75%);
}

a {
  color: inherit;
}

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

.skip-link {
  position: fixed;
  top: 12px;
  left: 12px;
  z-index: 100;
  padding: 10px 14px;
  color: var(--ground);
  background: var(--signal);
  border-radius: 4px;
  transform: translateY(-150%);
}

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

.site-header,
.hero,
.route,
.principle,
.site-footer {
  width: var(--page);
  margin-inline: auto;
}

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

.brand {
  display: inline-flex;
  gap: 12px;
  align-items: center;
  color: var(--ink);
  font-size: 0.95rem;
  font-weight: 670;
  letter-spacing: -0.01em;
  text-decoration: none;
}

.brand-mark {
  width: 28px;
  height: 28px;
  overflow: visible;
  fill: none;
  stroke: var(--signal);
  stroke-linecap: round;
  stroke-linejoin: round;
  stroke-width: 1.5;
}

.brand-mark path:last-child {
  opacity: 0.45;
}

.route-state {
  display: flex;
  gap: 9px;
  align-items: center;
  color: var(--ink-muted);
  font-family: var(--mono);
  font-size: 0.76rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.route-state__pulse {
  position: relative;
  display: block;
  width: 7px;
  height: 7px;
  background: var(--signal);
  border-radius: 50%;
  box-shadow: 0 0 14px rgba(141, 247, 206, 0.75);
}

.route-state__pulse::after {
  position: absolute;
  inset: -5px;
  border: 1px solid var(--signal);
  border-radius: inherit;
  content: "";
  opacity: 0;
  animation: pulse 2.4s ease-out infinite;
}

.hero {
  display: grid;
  grid-template-columns: minmax(0, 1.18fr) minmax(360px, 0.82fr);
  gap: clamp(56px, 8vw, 118px);
  align-items: center;
  min-height: 690px;
  padding: 92px 0 110px;
}

.eyebrow {
  margin: 0 0 22px;
  color: var(--signal);
  font-family: var(--mono);
  font-size: 0.76rem;
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

h1,
h2,
h3,
p {
  text-wrap: pretty;
}

h1 {
  max-width: 760px;
  margin: 0;
  font-size: clamp(3.65rem, 6.6vw, 6.2rem);
  font-weight: 560;
  letter-spacing: -0.068em;
  line-height: 0.98;
}

.hero__lede {
  max-width: 630px;
  margin: 34px 0 0;
  color: var(--ink-muted);
  font-size: clamp(1.08rem, 1.4vw, 1.24rem);
  line-height: 1.72;
}

.hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 38px;
}

.button {
  display: inline-flex;
  min-height: 48px;
  padding: 0 20px;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--line-strong);
  border-radius: 4px;
  font-size: 0.91rem;
  font-weight: 620;
  text-decoration: none;
  transition: border-color 160ms ease, background-color 160ms ease, color 160ms ease, transform 160ms ease;
}

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

.button:focus-visible,
.copy-button:focus-visible,
.brand:focus-visible,
.principle a:focus-visible {
  outline: 2px solid var(--signal-bright);
  outline-offset: 4px;
}

.button--primary {
  color: #03110d;
  background: var(--signal);
  border-color: var(--signal);
}

.button--primary:hover {
  background: var(--signal-bright);
  border-color: var(--signal-bright);
}

.button--quiet {
  color: var(--ink-muted);
  background: rgba(255, 255, 255, 0.015);
}

.button--quiet:hover {
  color: var(--ink);
  border-color: rgba(178, 255, 228, 0.45);
}

.session-card {
  position: relative;
  overflow: hidden;
  padding: 25px;
  background: linear-gradient(145deg, rgba(16, 38, 32, 0.88), rgba(8, 22, 18, 0.92));
  border: 1px solid var(--line-strong);
  border-radius: 6px;
  box-shadow: 0 30px 80px rgba(0, 0, 0, 0.28);
}

.session-card::before {
  position: absolute;
  top: 0;
  right: 0;
  width: 132px;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--signal));
  content: "";
}

.session-card__topline {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 19px;
  color: var(--ink-muted);
  font-family: var(--mono);
  font-size: 0.72rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.session-card__topline p {
  margin: 0;
}

.session-card__topline span {
  color: var(--signal);
}

.request-line {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  gap: 10px;
  align-items: center;
  min-height: 54px;
  padding: 0 13px;
  background: rgba(0, 0, 0, 0.23);
  border: 1px solid var(--line);
  border-radius: 3px;
  font-family: var(--mono);
  font-size: 0.73rem;
}

.request-line__method {
  color: var(--signal);
}

.request-line__host {
  overflow: hidden;
  color: var(--ink-muted);
  text-overflow: ellipsis;
  white-space: nowrap;
}

.copy-button {
  display: grid;
  width: 32px;
  height: 32px;
  padding: 0;
  color: var(--ink-faint);
  background: transparent;
  border: 0;
  border-radius: 3px;
  cursor: pointer;
  place-items: center;
}

.copy-button:hover,
.copy-button.is-copied {
  color: var(--signal);
  background: rgba(141, 247, 206, 0.08);
}

.copy-button svg {
  width: 17px;
  fill: none;
  stroke: currentColor;
  stroke-linecap: round;
  stroke-linejoin: round;
  stroke-width: 1.35;
}

.session-facts {
  margin: 24px 0 0;
}

.session-facts div {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 24px;
  padding: 13px 0;
  border-bottom: 1px solid var(--line);
}

.session-facts dt {
  color: var(--ink-faint);
  font-size: 0.82rem;
}

.session-facts dd {
  margin: 0;
  color: var(--ink);
  font-family: var(--mono);
  font-size: 0.76rem;
  text-align: right;
}

.session-facts dd.is-h3 {
  color: var(--signal);
}

.session-card__proof {
  display: flex;
  gap: 9px;
  align-items: flex-start;
  margin: 21px 0 0;
  color: var(--ink-muted);
  font-size: 0.78rem;
  line-height: 1.55;
}

.session-card__proof span {
  color: var(--signal);
}

.route {
  padding: 106px 0 125px;
  border-top: 1px solid var(--line);
}

.section-heading {
  display: grid;
  grid-template-columns: 1fr 2fr;
  gap: 48px;
  align-items: start;
}

.section-heading .eyebrow {
  margin-top: 9px;
}

h2 {
  max-width: 730px;
  margin: 0;
  font-size: clamp(2.15rem, 4vw, 3.65rem);
  font-weight: 540;
  letter-spacing: -0.048em;
  line-height: 1.08;
}

.route-map {
  position: relative;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 32px;
  margin-top: 92px;
}

.route-map__line {
  position: absolute;
  top: 23px;
  left: 0;
  width: 100%;
  height: 24px;
  overflow: visible;
}

.route-map__line path {
  fill: none;
  stroke: var(--line-strong);
  stroke-width: 2;
  vector-effect: non-scaling-stroke;
}

.route-map__line .route-map__energy {
  stroke: url(#route-gradient);
  stroke-dasharray: 80 920;
  stroke-linecap: round;
  animation: flow 5s linear infinite;
}

.route-node {
  position: relative;
  z-index: 1;
}

.route-node__index {
  display: block;
  margin-bottom: 11px;
  color: var(--ink-faint);
  font-family: var(--mono);
  font-size: 0.7rem;
}

.route-node__dot {
  width: 13px;
  height: 13px;
  margin-bottom: 29px;
  background: var(--ground);
  border: 2px solid var(--signal);
  border-radius: 50%;
  box-shadow: 0 0 0 7px var(--ground), 0 0 0 8px var(--line);
}

.route-node:last-child .route-node__dot {
  border-color: var(--blue);
}

.route-node h3 {
  margin: 0;
  font-size: 1.02rem;
  font-weight: 640;
  letter-spacing: -0.015em;
}

.route-node p {
  max-width: 225px;
  margin: 10px 0 0;
  color: var(--ink-muted);
  font-size: 0.89rem;
  line-height: 1.65;
}

.principle {
  display: grid;
  grid-template-columns: 1.08fr 0.92fr;
  gap: 9vw;
  padding: 105px 0 116px;
  border-top: 1px solid var(--line);
}

.principle__detail {
  padding-top: 6px;
}

.principle__detail p {
  margin: 0;
  color: var(--ink-muted);
  font-size: 1.03rem;
  line-height: 1.8;
}

.principle__detail a {
  display: inline-flex;
  gap: 8px;
  align-items: center;
  margin-top: 30px;
  color: var(--signal);
  font-size: 0.91rem;
  font-weight: 620;
  text-underline-offset: 5px;
}

.site-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 104px;
  color: var(--ink-faint);
  border-top: 1px solid var(--line);
  font-family: var(--mono);
  font-size: 0.7rem;
  letter-spacing: 0.035em;
  text-transform: uppercase;
}

.site-footer p {
  margin: 0;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

@keyframes pulse {
  0% { opacity: 0.75; transform: scale(0.45); }
  75%, 100% { opacity: 0; transform: scale(1.35); }
}

@keyframes flow {
  to { stroke-dashoffset: -1000; }
}

@media (max-width: 900px) {
  :root {
    --page: min(100% - 34px, 720px);
  }

  .hero {
    grid-template-columns: 1fr;
    gap: 64px;
    min-height: auto;
    padding: 78px 0 88px;
  }

  .session-card {
    max-width: 590px;
  }

  .section-heading {
    grid-template-columns: 1fr;
    gap: 4px;
  }

  .route-map {
    grid-template-columns: 1fr 1fr;
    row-gap: 52px;
  }

  .route-map__line {
    display: none;
  }

  .route-node__dot {
    margin-bottom: 23px;
  }

  .principle {
    grid-template-columns: 1fr;
    gap: 48px;
  }
}

@media (max-width: 560px) {
  :root {
    --page: calc(100% - 28px);
  }

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

  .route-state {
    font-size: 0;
  }

  h1 {
    font-size: clamp(3.2rem, 15vw, 4.45rem);
  }

  .hero {
    gap: 52px;
    padding: 64px 0 76px;
  }

  .hero__lede {
    margin-top: 27px;
    font-size: 1.02rem;
  }

  .hero__actions {
    display: grid;
  }

  .session-card {
    padding: 19px;
  }

  .session-facts div {
    align-items: flex-start;
  }

  .session-facts dd {
    max-width: 58%;
  }

  .route {
    padding: 82px 0 92px;
  }

  .route-map {
    grid-template-columns: 1fr;
    gap: 46px;
    margin-top: 65px;
    padding-left: 12px;
    border-left: 1px solid var(--line-strong);
  }

  .route-node__dot {
    position: absolute;
    top: 28px;
    left: -18.5px;
    width: 11px;
    height: 11px;
    margin: 0;
    box-shadow: 0 0 0 5px var(--ground);
  }

  .route-node h3,
  .route-node p {
    margin-left: 11px;
  }

  .principle {
    padding: 83px 0 90px;
  }

  .site-footer {
    display: grid;
    gap: 8px;
    align-content: center;
    padding: 24px 0;
  }
}

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

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