:root {
  --ink: #07131a;
  --ink-2: #0c1f2a;
  --fog: #d7e6df;
  --mist: #9bb8ad;
  --signal: #2fe3c0;
  --signal-dim: #1a9f86;
  --copper: #c47a3a;
  --line: rgba(215, 230, 223, 0.14);
  --font-display: "Syne", system-ui, sans-serif;
  --font-body: "Source Serif 4", Georgia, serif;
  --font-mono: "IBM Plex Mono", ui-monospace, monospace;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100vh;
  color: var(--fog);
  background: var(--ink);
  font-family: var(--font-body);
  font-size: 1.125rem;
  line-height: 1.55;
  overflow-x: hidden;
}

a {
  color: inherit;
  text-decoration-thickness: 1px;
  text-underline-offset: 0.2em;
}

.noise,
.mesh {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 0;
}

.mesh {
  background:
    radial-gradient(ellipse 80% 50% at 70% 10%, rgba(47, 227, 192, 0.16), transparent 55%),
    radial-gradient(ellipse 60% 40% at 10% 80%, rgba(196, 122, 58, 0.12), transparent 50%),
    linear-gradient(165deg, var(--ink) 0%, var(--ink-2) 45%, #061018 100%);
}

.noise {
  opacity: 0.07;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 200 200' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
  mix-blend-mode: overlay;
}

.top,
main,
footer {
  position: relative;
  z-index: 1;
}

.top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1.25rem 6vw;
  border-bottom: 1px solid var(--line);
}

.brand-mark {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 1rem;
  letter-spacing: 0.02em;
  text-decoration: none;
}

nav {
  display: flex;
  gap: 1.5rem;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

nav a {
  text-decoration: none;
  color: var(--mist);
  transition: color 0.25s ease;
}

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

.hero {
  min-height: calc(100vh - 4rem);
  display: grid;
  align-content: end;
  padding: 8vh 6vw 0;
  gap: 1rem;
}

.brand {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(3.5rem, 12vw, 8.5rem);
  line-height: 0.9;
  letter-spacing: -0.04em;
  color: var(--fog);
  animation: rise 0.9s ease both;
}

.hero h1 {
  margin: 0.5rem 0 0;
  max-width: 18ch;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(1.5rem, 3.2vw, 2.35rem);
  line-height: 1.15;
  letter-spacing: -0.02em;
  color: var(--mist);
  animation: rise 1s ease 0.08s both;
}

.lede {
  margin: 0.75rem 0 0;
  max-width: 38rem;
  color: rgba(215, 230, 223, 0.78);
  animation: rise 1s ease 0.16s both;
}

.cta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-top: 1.5rem;
  animation: rise 1s ease 0.24s both;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.85rem 1.25rem;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  text-decoration: none;
  border: 1px solid transparent;
  transition: transform 0.2s ease, background 0.2s ease, border-color 0.2s ease;
}

.btn:hover {
  transform: translateY(-1px);
}

.btn.primary {
  background: var(--signal);
  color: var(--ink);
}

.btn.primary:hover {
  background: #57f0d0;
}

.btn.ghost {
  border-color: var(--line);
  color: var(--fog);
}

.btn.ghost:hover {
  border-color: var(--signal-dim);
}

.hero-visual {
  margin: 2.5rem -6vw 0;
  width: calc(100% + 12vw);
  border-top: 1px solid var(--line);
  overflow: hidden;
  animation: fade 1.2s ease 0.35s both;
}

#signal {
  display: block;
  width: 100%;
  height: auto;
  max-height: 42vh;
  opacity: 0.9;
}

.panel {
  padding: 7rem 6vw;
  border-top: 1px solid var(--line);
}

.panel h2 {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(2rem, 4vw, 3rem);
  letter-spacing: -0.03em;
  max-width: 16ch;
}

.support {
  margin: 0.85rem 0 0;
  max-width: 36rem;
  color: rgba(215, 230, 223, 0.72);
}

.steps {
  list-style: none;
  margin: 3rem 0 0;
  padding: 0;
  display: grid;
  gap: 0;
}

.steps li {
  display: grid;
  grid-template-columns: 4rem 1fr;
  gap: 1.25rem;
  padding: 1.5rem 0;
  border-top: 1px solid var(--line);
}

.steps .n {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--signal);
  padding-top: 0.2rem;
}

.steps strong {
  font-family: var(--font-display);
  font-size: 1.15rem;
  letter-spacing: -0.01em;
}

.steps p {
  margin: 0.35rem 0 0;
  color: rgba(215, 230, 223, 0.68);
  font-size: 1rem;
}

.stack-list {
  margin: 2rem 0 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 0.75rem;
  max-width: 40rem;
  font-family: var(--font-mono);
  font-size: 0.9rem;
  color: var(--mist);
}

.stack-list li {
  padding-left: 1rem;
  border-left: 2px solid var(--copper);
}

.prove .steps {
  margin-top: 2.5rem;
}

.prove-note {
  margin-top: 2.5rem;
  max-width: 40rem;
  padding-top: 1.25rem;
  border-top: 1px solid var(--line);
  color: rgba(215, 230, 223, 0.62);
  font-size: 1rem;
}

.terminal {
  margin: 2.5rem 0 0;
  padding: 1.25rem 1.4rem;
  background: rgba(0, 0, 0, 0.35);
  border: 1px solid var(--line);
  overflow-x: auto;
  font-family: var(--font-mono);
  font-size: 0.82rem;
  line-height: 1.7;
  color: var(--signal);
}

.close {
  text-align: left;
}

.close .btn {
  margin-top: 1.75rem;
}

footer {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  flex-wrap: wrap;
  padding: 1.5rem 6vw 2rem;
  border-top: 1px solid var(--line);
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--mist);
}

#status[data-ok="true"] {
  color: var(--signal);
}

#status[data-ok="false"] {
  color: var(--copper);
}

@keyframes rise {
  from {
    opacity: 0;
    transform: translateY(18px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes fade {
  from {
    opacity: 0;
  }
  to {
    opacity: 0.9;
  }
}

@media (max-width: 720px) {
  nav {
    display: none;
  }

  .hero {
    align-content: center;
    padding-top: 12vh;
  }

  .steps li {
    grid-template-columns: 2.5rem 1fr;
  }
}