@import url('https://fonts.googleapis.com/css2?family=DM+Mono:wght@300;400;500&family=Manrope:wght@400;500;600;700&display=swap');

:root {
  color-scheme: dark;
  --bg: #080b12;
  --panel: #0d111b;
  --panel-raised: #111827;
  --ink: #f2f5fb;
  --soft: #a9b3c5;
  --muted: #68758c;
  --line: rgba(142, 161, 194, 0.18);
  --line-strong: rgba(142, 161, 194, 0.34);
  --blue: #68a7ff;
  --blue-dim: rgba(104, 167, 255, 0.14);
  --amber: #ffb454;
  --amber-dim: rgba(255, 180, 84, 0.14);
  --mono: "DM Mono", ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  --sans: Manrope, system-ui, sans-serif;
  --max: 1180px;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  min-width: 320px;
  color: var(--ink);
  background:
    radial-gradient(circle at 82% 18%, rgba(66, 116, 202, 0.13), transparent 27rem),
    radial-gradient(circle at 8% 70%, rgba(255, 180, 84, 0.055), transparent 22rem),
    var(--bg);
  font-family: var(--sans);
  font-size: 1rem;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: -1;
  pointer-events: none;
  opacity: 0.22;
  background-image:
    linear-gradient(var(--line) 1px, transparent 1px),
    linear-gradient(90deg, var(--line) 1px, transparent 1px);
  background-size: 72px 72px;
  mask-image: linear-gradient(to bottom, black, transparent 72%);
}

a { color: inherit; }

button,
input { font: inherit; }

::selection { background: var(--amber); color: var(--bg); }

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

.skip-link {
  position: fixed;
  left: 1rem;
  top: -5rem;
  z-index: 100;
  background: var(--ink);
  color: var(--bg);
  padding: 0.65rem 1rem;
}

.skip-link:focus { top: 1rem; }

.topbar {
  min-height: 76px;
  width: min(calc(100% - 2rem), var(--max));
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  gap: 2rem;
  border-bottom: 1px solid var(--line);
}

.wordmark {
  display: inline-flex;
  align-items: center;
  gap: 0.75rem;
  width: max-content;
  text-decoration: none;
  font-family: var(--mono);
  font-size: 0.88rem;
  font-weight: 500;
}

.wordmark-mark {
  display: grid;
  place-items: center;
  width: 2rem;
  height: 2rem;
  background: var(--blue);
  color: var(--bg);
  font-weight: 500;
}

nav { display: flex; gap: 1.8rem; }

nav a {
  color: var(--soft);
  font-family: var(--mono);
  font-size: 0.76rem;
  text-decoration: none;
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

nav a:hover { color: var(--ink); }

.relay-state {
  justify-self: end;
  display: flex;
  align-items: center;
  gap: 0.55rem;
  color: var(--muted);
  font-family: var(--mono);
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.relay-state span {
  width: 0.52rem;
  height: 0.52rem;
  border: 1px solid var(--blue);
  border-radius: 50%;
  box-shadow: 0 0 12px var(--blue);
  animation: breathe 2.4s ease-in-out infinite;
}

main,
footer { width: min(calc(100% - 2rem), var(--max)); margin-inline: auto; }

.hero {
  position: relative;
  min-height: calc(100vh - 76px);
  min-height: calc(100dvh - 76px);
  display: grid;
  grid-template-columns: minmax(0, 1.08fr) minmax(320px, 0.92fr);
  align-items: center;
  gap: clamp(2rem, 7vw, 7rem);
  padding: clamp(5rem, 10vh, 8rem) 0 6rem;
  border-bottom: 1px solid var(--line);
  overflow: hidden;
}

.hero-copy { position: relative; z-index: 2; }

.eyebrow {
  margin: 0 0 1rem;
  color: var(--blue);
  font-family: var(--mono);
  font-size: 0.74rem;
  font-weight: 500;
  letter-spacing: 0.11em;
  text-transform: uppercase;
}

h1,
h2,
h3,
p { margin-top: 0; }

h1 {
  position: relative;
  width: max-content;
  margin-bottom: 1.6rem;
  font-family: var(--sans);
  font-size: clamp(4.5rem, 11vw, 9rem);
  font-weight: 700;
  letter-spacing: -0.1em;
  line-height: 0.7;
}

h1 span {
  background: linear-gradient(120deg, #ffffff 24%, #a9caff 72%, var(--blue));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

h1 b {
  position: absolute;
  right: -0.45em;
  top: -0.22em;
  color: var(--amber);
  font-family: var(--mono);
  font-size: 0.28em;
  font-weight: 400;
}

.hero-line {
  margin-bottom: 1.25rem;
  color: var(--soft);
  font-family: var(--mono);
  font-size: clamp(0.92rem, 2vw, 1.12rem);
  letter-spacing: 0.08em;
}

.hero-line i { color: var(--amber); font-style: normal; padding: 0 0.55rem; }

.intro { max-width: 37rem; color: var(--soft); font-size: 1.05rem; }

.hero-actions { display: flex; flex-wrap: wrap; gap: 0.85rem; margin-top: 2rem; }

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.7rem;
  min-height: 48px;
  padding: 0.75rem 1.1rem;
  border: 1px solid var(--line-strong);
  font-family: var(--mono);
  font-size: 0.78rem;
  text-decoration: none;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  transition: 180ms ease;
}

.button-primary { background: var(--blue); border-color: var(--blue); color: var(--bg); }
.button-primary:hover { background: #95c1ff; border-color: #95c1ff; transform: translateY(-2px); }
.button-quiet:hover { border-color: var(--amber); color: var(--amber); }

.signal {
  position: relative;
  width: min(100%, 460px);
  aspect-ratio: 1;
  justify-self: center;
  display: grid;
  place-items: center;
}

.signal::before,
.signal::after {
  content: "";
  position: absolute;
  inset: 5%;
  border-radius: 50%;
  background: repeating-radial-gradient(circle, transparent 0 34px, rgba(104, 167, 255, 0.06) 35px 36px);
}

.signal::after {
  inset: 22%;
  border: 1px solid var(--line);
  background: radial-gradient(circle, var(--blue-dim), transparent 68%);
  box-shadow: inset 0 0 50px rgba(104, 167, 255, 0.08), 0 0 70px rgba(104, 167, 255, 0.05);
}

.signal-orbit {
  position: absolute;
  border: 1px solid var(--line-strong);
  border-radius: 50%;
}

.orbit-one { inset: 7%; animation: spin 18s linear infinite; }
.orbit-two { inset: 18%; border-style: dashed; transform: rotate(42deg); animation: spin-reverse 13s linear infinite; }
.orbit-three { inset: 31%; border-color: rgba(255, 180, 84, 0.32); animation: spin 9s linear infinite; }

.orbit-one::before,
.orbit-two::before,
.orbit-three::before {
  content: "";
  position: absolute;
  left: 50%;
  top: -4px;
  width: 7px;
  height: 7px;
  background: var(--blue);
  border-radius: 50%;
  box-shadow: 0 0 12px var(--blue);
}

.orbit-three::before { background: var(--amber); box-shadow: 0 0 12px var(--amber); }

.signal-core {
  position: relative;
  z-index: 2;
  width: 37%;
  aspect-ratio: 1;
  display: grid;
  place-content: center;
  text-align: center;
  border: 1px solid var(--blue);
  background: rgba(8, 11, 18, 0.78);
  transform: rotate(45deg);
}

.signal-core > * { transform: rotate(-45deg); }
.signal-label { color: var(--ink); font-family: var(--mono); font-size: 1rem; letter-spacing: 0.12em; }
.signal-motto {
  width: 8.5rem;
  margin-top: 0.45rem;
  color: var(--muted);
  font-family: var(--mono);
  font-size: 0.52rem;
  line-height: 1.45;
  letter-spacing: 0.08em;
  text-align: center;
  transition: opacity 180ms ease;
}
.signal-motto.is-changing { opacity: 0; }

.signal-node { position: absolute; width: 5px; height: 5px; background: var(--amber); box-shadow: 0 0 10px var(--amber); }
.node-a { left: 8%; top: 42%; }
.node-b { right: 14%; top: 21%; }
.node-c { right: 24%; bottom: 12%; }

.hero-readout {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 1.35rem;
  display: flex;
  justify-content: space-between;
  color: var(--muted);
  font-family: var(--mono);
  font-size: 0.64rem;
  text-transform: uppercase;
  letter-spacing: 0.07em;
}

.index-section,
.console-section { padding: clamp(5rem, 9vw, 8rem) 0; border-bottom: 1px solid var(--line); }

.section-heading {
  display: grid;
  grid-template-columns: 3rem minmax(0, 1fr);
  gap: 1.25rem;
  align-items: start;
  margin-bottom: 3rem;
}

.section-number { color: var(--amber); font-family: var(--mono); font-size: 0.73rem; }

h2 { margin-bottom: 0; font-size: clamp(2.2rem, 5vw, 4.7rem); line-height: 1; letter-spacing: -0.055em; }

.index-grid { display: grid; grid-template-columns: repeat(3, 1fr); border-top: 1px solid var(--line); }

.index-card {
  position: relative;
  min-height: 280px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  gap: 2rem;
  padding: 1.5rem;
  border-right: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  text-decoration: none;
  transition: 180ms ease;
}

.index-card:first-child { border-left: 1px solid var(--line); }
.index-card:hover { background: var(--blue-dim); border-bottom-color: var(--blue); transform: translateY(-4px); }
.card-count { color: var(--muted); font-family: var(--mono); font-size: 0.7rem; }
.index-card h3 { margin-bottom: 0.65rem; font-size: 1.35rem; }
.index-card p { margin-bottom: 0; color: var(--soft); font-size: 0.92rem; }
.card-arrow { position: absolute; right: 1.5rem; top: 1.3rem; color: var(--amber); }

.terminal { border: 1px solid var(--line-strong); background: rgba(7, 10, 16, 0.84); box-shadow: 0 28px 80px rgba(0, 0, 0, 0.3); }

.terminal-bar {
  display: flex;
  justify-content: space-between;
  padding: 0.8rem 1rem;
  border-bottom: 1px solid var(--line);
  color: var(--muted);
  font-family: var(--mono);
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

.terminal-status { color: var(--blue); }

.terminal-output {
  min-height: 220px;
  max-height: 360px;
  overflow-y: auto;
  padding: 1.25rem;
  color: #dce7f8;
  font-family: var(--mono);
  font-size: 0.84rem;
}

.terminal-output p { margin-bottom: 0.45rem; }
.terminal-output .muted { display: inline-block; min-width: 4.5rem; color: var(--muted); }
.terminal-output .answer { color: var(--blue); }
.terminal-output .error { color: var(--amber); }

.terminal form {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  gap: 0.75rem;
  align-items: center;
  padding: 0.9rem 1rem;
  border-top: 1px solid var(--line);
}

.prompt { color: var(--amber); font-family: var(--mono); font-size: 0.8rem; }

.terminal input {
  width: 100%;
  border: 0;
  outline: 0;
  background: transparent;
  color: var(--ink);
  font-family: var(--mono);
  font-size: 0.84rem;
}

.terminal button {
  border: 1px solid var(--line-strong);
  background: transparent;
  color: var(--soft);
  padding: 0.38rem 0.7rem;
  font-family: var(--mono);
  font-size: 0.7rem;
  cursor: pointer;
}

.terminal button:hover { border-color: var(--blue); color: var(--blue); }

.scope-section {
  display: grid;
  grid-template-columns: 3rem minmax(0, 1fr) auto;
  gap: 1.25rem;
  align-items: center;
  padding: clamp(5rem, 9vw, 8rem) 0;
}

.scope-section > div:nth-child(2) { max-width: 43rem; }
.scope-section h2 { margin-bottom: 1.5rem; }
.scope-section p:last-child { margin-bottom: 0; color: var(--soft); }

.scope-stamp {
  width: 154px;
  height: 154px;
  display: grid;
  place-content: center;
  gap: 0.2rem;
  border: 1px solid var(--amber);
  border-radius: 50%;
  color: var(--amber);
  text-align: center;
  font-family: var(--mono);
  transform: rotate(-8deg);
}

.scope-stamp span { font-size: 0.72rem; letter-spacing: 0.1em; }
.scope-stamp small { color: var(--muted); font-size: 0.58rem; }

footer {
  min-height: 100px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 2rem;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-family: var(--mono);
  font-size: 0.68rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

footer p { margin-bottom: 0; }
footer strong { color: var(--soft); font-weight: 500; }

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

@keyframes spin { to { transform: rotate(360deg); } }
@keyframes spin-reverse { from { transform: rotate(42deg); } to { transform: rotate(-318deg); } }
@keyframes breathe { 50% { opacity: 0.28; box-shadow: 0 0 4px var(--blue); } }

@media (max-width: 860px) {
  .topbar { grid-template-columns: 1fr auto; }
  .topbar nav { display: none; }
  .hero { grid-template-columns: 1fr; padding-top: 5rem; }
  .signal { position: absolute; right: -16%; top: 12%; width: 60vw; min-width: 330px; opacity: 0.35; }
  .hero-copy { max-width: 38rem; }
  .index-grid { grid-template-columns: 1fr; }
  .index-card { min-height: 210px; border-left: 1px solid var(--line); }
  .scope-section { grid-template-columns: 3rem minmax(0, 1fr); }
  .scope-stamp { grid-column: 2; margin-top: 1.5rem; }
}

@media (max-width: 560px) {
  .topbar { width: min(calc(100% - 1.25rem), var(--max)); gap: 0.75rem; }
  .wordmark { font-size: 0.78rem; }
  .relay-state { font-size: 0.61rem; }
  main, footer { width: min(calc(100% - 1.25rem), var(--max)); }
  .hero { min-height: calc(100dvh - 76px); }
  h1 { font-size: clamp(4rem, 21vw, 6.5rem); }
  .hero-readout { align-items: flex-end; }
  .hero-readout span:first-child { max-width: 12rem; }
  .section-heading, .scope-section { grid-template-columns: 2rem minmax(0, 1fr); }
  .terminal form { grid-template-columns: 1fr auto; }
  .prompt { grid-column: 1 / -1; }
  footer { padding: 2rem 0; flex-direction: column; align-items: flex-start; gap: 0.5rem; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { scroll-behavior: auto !important; animation: none !important; transition: none !important; }
}