:root {
  color-scheme: dark;
  --bg: #0b1117;
  --panel: #111a23;
  --panel-strong: #172331;
  --ink: #eef5f7;
  --muted: #9fb0bd;
  --line: rgba(255, 255, 255, .12);
  --teal: #25d0ab;
  --gold: #f2b84b;
  --blue: #72a7ff;
  --shadow: 0 28px 90px rgba(0, 0, 0, .34);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  background:
    radial-gradient(circle at 20% 12%, rgba(37, 208, 171, .18), transparent 30rem),
    radial-gradient(circle at 82% 20%, rgba(114, 167, 255, .16), transparent 28rem),
    linear-gradient(180deg, #0b1117 0%, #101820 56%, #0c1218 100%);
  color: var(--ink);
  margin: 0;
  min-height: 100vh;
}

a {
  color: inherit;
  text-decoration: none;
}

.topbar {
  align-items: center;
  display: flex;
  justify-content: space-between;
  margin: 0 auto;
  max-width: 1180px;
  padding: 1.25rem 1.25rem 0;
}

.brand {
  align-items: center;
  display: inline-flex;
  font-size: 1.05rem;
  font-weight: 760;
  gap: .65rem;
}

nav {
  display: flex;
  gap: .35rem;
}

nav a {
  border: 1px solid transparent;
  border-radius: 999px;
  color: var(--muted);
  font-size: .92rem;
  padding: .55rem .85rem;
}

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

main {
  margin: 0 auto;
  max-width: 1180px;
  padding: 0 1.25rem 3rem;
}

.hero {
  align-items: center;
  display: grid;
  gap: 3rem;
  grid-template-columns: minmax(0, 1.08fr) minmax(20rem, .92fr);
  min-height: 72vh;
  padding: 4.25rem 0 3rem;
}

.eyebrow,
.section-kicker,
.status {
  color: var(--teal);
  font-size: .76rem;
  font-weight: 800;
  letter-spacing: .11em;
  text-transform: uppercase;
}

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

h1 {
  font-size: clamp(3rem, 7vw, 6.7rem);
  letter-spacing: 0;
  line-height: .92;
  margin-top: .8rem;
  max-width: 10.7ch;
}

.lede {
  color: var(--muted);
  font-size: clamp(1.05rem, 2vw, 1.3rem);
  line-height: 1.6;
  margin-top: 1.45rem;
  max-width: 43rem;
}

.hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: .85rem;
  margin-top: 2rem;
}

.button {
  align-items: center;
  border-radius: 8px;
  display: inline-flex;
  font-weight: 750;
  min-height: 3rem;
  padding: .85rem 1.05rem;
}

.button--primary {
  background: var(--teal);
  color: #07110f;
}

.button--secondary {
  border: 1px solid var(--line);
  color: var(--ink);
}

.code-panel {
  background: rgba(17, 26, 35, .86);
  border: 1px solid var(--line);
  border-radius: 14px;
  box-shadow: var(--shadow);
  overflow: hidden;
}

.code-panel__header {
  align-items: center;
  background: rgba(255, 255, 255, .04);
  border-bottom: 1px solid var(--line);
  display: flex;
  gap: .45rem;
  padding: .8rem 1rem;
}

.code-panel__header span {
  background: var(--gold);
  border-radius: 50%;
  height: .7rem;
  width: .7rem;
}

.code-panel__header span:nth-child(2) {
  background: var(--teal);
}

.code-panel__header span:nth-child(3) {
  background: var(--blue);
}

pre {
  margin: 0;
  overflow-x: auto;
  padding: 1.35rem;
}

code {
  color: #d9f7ef;
  font-family: "Cascadia Code", "SFMono-Regular", Consolas, monospace;
  font-size: .94rem;
  line-height: 1.7;
}

.principles,
.specs {
  border-top: 1px solid var(--line);
  padding: 3rem 0;
}

h2 {
  font-size: clamp(2rem, 4vw, 3.4rem);
  line-height: 1;
  margin-top: .65rem;
}

.principles__grid,
.specs__grid {
  display: grid;
  gap: 1rem;
  margin-top: 1.6rem;
}

.principles__grid {
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

.principles article,
.spec-card {
  background: rgba(255, 255, 255, .045);
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 1.15rem;
}

.principles h3,
.spec-card h3 {
  font-size: 1.08rem;
  margin-bottom: .65rem;
}

.principles p,
.spec-card p {
  color: var(--muted);
  line-height: 1.55;
}

.specs__grid {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.spec-card {
  min-height: 15rem;
  transition: border-color .16s ease, transform .16s ease, background .16s ease;
}

.spec-card:hover {
  background: rgba(255, 255, 255, .07);
  border-color: rgba(37, 208, 171, .62);
  transform: translateY(-2px);
}

.spec-card--ready {
  background: rgba(37, 208, 171, .10);
}

.spec-card h3 {
  font-size: 1.45rem;
  line-height: 1.15;
  margin-top: 1.1rem;
}

.spec-card strong {
  color: var(--ink);
  display: block;
  margin-top: 1.25rem;
}

footer {
  border-top: 1px solid var(--line);
  color: var(--muted);
  display: flex;
  justify-content: space-between;
  margin: 0 auto;
  max-width: 1180px;
  padding: 1.25rem;
}

footer span:first-child {
  color: var(--ink);
  font-weight: 800;
}

@media (max-width: 920px) {
  .hero,
  .principles__grid,
  .specs__grid {
    grid-template-columns: 1fr;
  }

  .hero {
    min-height: auto;
  }
}

@media (max-width: 640px) {
  .topbar,
  footer {
    align-items: flex-start;
    flex-direction: column;
    gap: 1rem;
  }

  nav {
    flex-wrap: wrap;
  }

  h1 {
    font-size: 3rem;
  }
}