:root {
  color-scheme: dark;
  --bg: #000000;
  --panel: #0c171e;
  --panel-strong: #10222b;
  --text: #f4f8fb;
  --body: #c7d2db;
  --muted: #8fa4b2;
  --hairline: #21323c;
  --cyan: #009ecc;
  --teal: #3288a7;
  --slate: #487182;
  font-family:
    Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

* {
  box-sizing: border-box;
}

html {
  background: var(--bg);
  color: var(--body);
  scroll-behavior: smooth;
}

body {
  min-width: 320px;
  margin: 0;
  background:
    linear-gradient(180deg, rgba(12, 23, 30, 0.7) 0%, rgba(0, 0, 0, 0) 36rem),
    var(--bg);
}

a {
  color: inherit;
}

a:focus-visible {
  outline: 3px solid var(--cyan);
  outline-offset: 4px;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  min-height: 72px;
  padding: 1rem clamp(1rem, 4vw, 3rem);
  border-bottom: 1px solid rgba(33, 50, 60, 0.82);
  background: rgba(0, 0, 0, 0.86);
  backdrop-filter: blur(16px);
}

.brand {
  display: inline-flex;
  align-items: center;
}

.brand img {
  display: block;
  width: 144px;
  height: auto;
}

nav {
  display: flex;
  align-items: center;
  gap: clamp(0.75rem, 3vw, 1.5rem);
}

nav a {
  font-size: 0.92rem;
  font-weight: 700;
  color: var(--body);
  text-decoration: none;
}

main {
  overflow: hidden;
}

.hero {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(18rem, 28rem);
  gap: clamp(2rem, 6vw, 5rem);
  align-items: center;
  min-height: calc(100vh - 72px);
  padding: clamp(3rem, 8vw, 6rem) clamp(1rem, 5vw, 4rem) clamp(2rem, 6vw, 4rem);
}

.hero-copy {
  max-width: 62rem;
}

.kicker,
.eyebrow {
  margin: 0 0 0.75rem;
  color: #7fc8dd;
  font-size: 0.78rem;
  font-weight: 800;
  letter-spacing: 0;
  text-transform: uppercase;
}

h1,
h2,
p {
  overflow-wrap: anywhere;
}

h1 {
  max-width: 11ch;
  margin: 0;
  color: var(--text);
  font-size: 7rem;
  line-height: 0.92;
  letter-spacing: 0;
}

h2 {
  margin: 0;
  color: var(--text);
  font-size: 2rem;
  line-height: 1.08;
  letter-spacing: 0;
}

.hero-text {
  max-width: 48rem;
  margin: 1.5rem 0 0;
  color: var(--body);
  font-size: 1.25rem;
  line-height: 1.55;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  margin-top: 2rem;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 0.85rem 1.05rem;
  border: 1px solid var(--hairline);
  color: var(--text);
  font-weight: 800;
  line-height: 1.1;
  text-decoration: none;
}

.button.primary {
  border-color: var(--cyan);
  background: var(--cyan);
  color: #001018;
}

.button.secondary {
  background: rgba(16, 34, 43, 0.86);
}

.signal-panel {
  align-self: stretch;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  min-height: 31rem;
  padding: 1.25rem;
  border: 1px solid var(--hairline);
  background:
    linear-gradient(135deg, rgba(50, 136, 167, 0.2), rgba(72, 113, 130, 0.08)),
    var(--panel);
}

.signal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  color: var(--muted);
  font-size: 0.82rem;
  text-transform: uppercase;
}

.signal-header strong {
  color: var(--text);
}

.signal-panel ol,
.proof ul {
  display: grid;
  gap: 1rem;
  margin: 0;
  padding: 0;
  list-style: none;
}

.signal-panel li {
  display: grid;
  grid-template-columns: 3rem minmax(0, 1fr);
  gap: 1rem;
  align-items: start;
  padding: 1rem 0;
  border-top: 1px solid var(--hairline);
}

.signal-panel span {
  color: #7fc8dd;
  font-weight: 900;
}

.signal-panel p,
.doors p,
.proof li {
  margin: 0;
  color: var(--body);
  line-height: 1.55;
}

.doors {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  border-block: 1px solid var(--hairline);
  background: var(--hairline);
}

.doors article {
  display: grid;
  align-content: start;
  gap: 1rem;
  min-height: 24rem;
  padding: clamp(1.25rem, 5vw, 3rem);
  background: var(--bg);
}

.doors article:first-child {
  background: var(--panel);
}

.proof {
  display: grid;
  grid-template-columns: minmax(0, 0.9fr) minmax(16rem, 1.1fr);
  gap: clamp(1.5rem, 6vw, 4rem);
  padding: clamp(3rem, 8vw, 6rem) clamp(1rem, 5vw, 4rem);
  background: var(--panel-strong);
}

.proof li {
  padding: 1rem;
  border-left: 3px solid var(--teal);
  background: rgba(0, 0, 0, 0.28);
}

@media (max-width: 760px) {
  .site-header {
    align-items: flex-start;
    flex-direction: column;
  }

  .hero,
  .doors,
  .proof {
    grid-template-columns: 1fr;
  }

  .hero {
    min-height: auto;
  }

  h1 {
    max-width: 8ch;
    font-size: 4rem;
  }

  h2 {
    font-size: 1.6rem;
  }

  .hero-text {
    font-size: 1.08rem;
  }

  .signal-panel,
  .doors article {
    min-height: auto;
  }
}