:root {
  color-scheme: dark;
  --ink: #f5f7fb;
  --muted: #a8b1c0;
  --soft: #d7e1ec;
  --line: rgba(255, 255, 255, 0.14);
  --panel: rgba(14, 20, 28, 0.82);
  --cyan: #4ee4d4;
  --blue: #5a8dff;
  --amber: #f4be6c;
  --green: #77dfa3;
  --night: #070a0f;
  --steel: #151d27;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--night);
  color: var(--ink);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  line-height: 1.5;
}

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

.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 10;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 18px clamp(20px, 4vw, 56px);
  background: rgba(6, 9, 13, 0.62);
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  backdrop-filter: blur(18px);
}

.brand,
.nav-links,
.hero-actions,
.hero-metrics,
.security-strip,
.footer-bottom {
  display: flex;
  align-items: center;
}

.brand {
  gap: 10px;
  font-size: 15px;
  font-weight: 800;
  letter-spacing: 0;
}

.brand-mark {
  display: grid;
  width: 34px;
  height: 34px;
  place-items: center;
  border: 1px solid rgba(78, 228, 212, 0.52);
  border-radius: 8px;
  background: linear-gradient(135deg, rgba(78, 228, 212, 0.28), rgba(90, 141, 255, 0.18));
  color: #fff;
}

.nav-links {
  gap: clamp(16px, 3vw, 36px);
  color: var(--muted);
  font-size: 14px;
  font-weight: 600;
}

.nav-links a:hover,
.header-action:hover {
  color: var(--ink);
}

.header-action {
  padding: 10px 16px;
  border: 1px solid var(--line);
  border-radius: 8px;
  color: var(--soft);
  font-size: 14px;
  font-weight: 700;
}

.hero {
  position: relative;
  min-height: 92vh;
  display: grid;
  align-items: center;
  overflow: hidden;
  padding: 124px clamp(20px, 5vw, 72px) 64px;
}

.hero-image,
.hero-scrim {
  position: absolute;
  inset: 0;
}

.hero-image {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
}

.hero-scrim {
  background:
    linear-gradient(90deg, rgba(5, 8, 13, 0.94) 0%, rgba(5, 8, 13, 0.82) 34%, rgba(5, 8, 13, 0.24) 68%, rgba(5, 8, 13, 0.46) 100%),
    linear-gradient(180deg, rgba(5, 8, 13, 0.1) 0%, rgba(5, 8, 13, 0.82) 100%);
}

.hero-content {
  position: relative;
  z-index: 1;
  width: min(690px, 100%);
}

.eyebrow {
  margin: 0 0 14px;
  color: var(--cyan);
  font-size: 12px;
  font-weight: 800;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

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

h1 {
  margin-bottom: 20px;
  font-size: clamp(64px, 11vw, 156px);
  line-height: 0.9;
  letter-spacing: 0;
}

.hero-copy {
  width: min(560px, 100%);
  margin-bottom: 32px;
  color: var(--soft);
  font-size: clamp(18px, 2vw, 23px);
}

.hero-actions {
  flex-wrap: wrap;
  gap: 12px;
  margin-bottom: 52px;
}

.button {
  display: inline-flex;
  min-height: 48px;
  align-items: center;
  justify-content: center;
  padding: 0 20px;
  border-radius: 8px;
  font-weight: 800;
}

.button.primary {
  background: var(--cyan);
  color: #041111;
  box-shadow: 0 16px 40px rgba(78, 228, 212, 0.22);
}

.button.secondary {
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.07);
  color: var(--ink);
}

.button.light {
  background: #f8fbff;
  color: #09111a;
  box-shadow: none;
}

.hero-metrics {
  width: min(660px, 100%);
  align-items: stretch;
  gap: 1px;
  padding: 1px;
  background: var(--line);
  border-radius: 8px;
  overflow: hidden;
}

.hero-metrics div {
  flex: 1 1 160px;
  min-width: 0;
  padding: 18px;
  background: rgba(10, 17, 25, 0.76);
}

.hero-metrics dt {
  font-size: clamp(24px, 4vw, 38px);
  font-weight: 800;
  line-height: 1;
}

.hero-metrics dd {
  margin: 8px 0 0;
  color: var(--muted);
  font-size: 13px;
  font-weight: 700;
}

.section {
  padding: clamp(70px, 9vw, 124px) clamp(20px, 5vw, 72px);
}

.platform {
  background: #091018;
}

.section-heading {
  display: grid;
  grid-template-columns: minmax(0, 0.9fr) minmax(280px, 1.1fr);
  gap: clamp(20px, 5vw, 80px);
  max-width: 1180px;
  margin: 0 auto 42px;
}

.section-heading h2,
.signal-panel h2,
.demo-band h2 {
  margin-bottom: 0;
  font-size: clamp(34px, 5vw, 68px);
  line-height: 1;
  letter-spacing: 0;
}

.section-heading.compact {
  display: block;
  max-width: 860px;
  margin-bottom: 34px;
  text-align: center;
}

.feature-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
  max-width: 1180px;
  margin: 0 auto;
}

.feature-card {
  min-height: 290px;
  padding: 28px;
  border: 1px solid rgba(255, 255, 255, 0.11);
  border-radius: 8px;
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.07), rgba(255, 255, 255, 0.03));
}

.feature-icon {
  display: inline-flex;
  margin-bottom: 58px;
  color: var(--amber);
  font-weight: 800;
}

.feature-card h3 {
  margin-bottom: 12px;
  font-size: 24px;
}

.feature-card p {
  margin-bottom: 0;
  color: var(--muted);
}

.signals {
  background:
    linear-gradient(120deg, rgba(21, 29, 39, 0.92), rgba(8, 15, 22, 0.98)),
    #101923;
}

.signal-panel {
  display: grid;
  grid-template-columns: minmax(280px, 1.1fr) minmax(260px, 0.9fr);
  gap: clamp(24px, 5vw, 80px);
  max-width: 1180px;
  margin: 0 auto;
  align-items: center;
}

.signal-list {
  border: 1px solid var(--line);
  border-radius: 8px;
  overflow: hidden;
}

.signal-row {
  display: flex;
  justify-content: space-between;
  gap: 18px;
  padding: 22px 24px;
  border-bottom: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.04);
}

.signal-row:last-child {
  border-bottom: 0;
}

.signal-row span {
  color: var(--muted);
  font-weight: 700;
}

.signal-row strong {
  color: var(--green);
}

.security {
  background: #f3f7f7;
  color: #111820;
}

.security .eyebrow {
  color: #11756f;
}

.security-strip {
  max-width: 1040px;
  margin: 0 auto;
  flex-wrap: wrap;
  justify-content: center;
  gap: 12px;
}

.security-strip span {
  padding: 12px 16px;
  border: 1px solid rgba(17, 24, 32, 0.14);
  border-radius: 8px;
  background: #fff;
  color: #2c3a46;
  font-weight: 800;
}

.demo-band {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: clamp(54px, 7vw, 86px) clamp(20px, 5vw, 72px);
  background: #0a1018;
}

.demo-band h2 {
  max-width: 780px;
}

.site-footer {
  padding: 56px clamp(20px, 5vw, 72px) 28px;
  background: #05080d;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-main {
  display: grid;
  grid-template-columns: minmax(240px, 1fr) minmax(360px, 1.35fr);
  gap: clamp(34px, 6vw, 96px);
  max-width: 1180px;
  margin: 0 auto 42px;
}

.footer-brand p {
  max-width: 390px;
  margin: 20px 0 0;
  color: var(--muted);
}

.footer-links {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 28px;
}

.footer-links h2 {
  margin: 0 0 16px;
  color: var(--ink);
  font-size: 13px;
  line-height: 1;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.footer-links a {
  display: block;
  margin-bottom: 10px;
  color: var(--muted);
  font-size: 14px;
  font-weight: 700;
}

.footer-links a:hover,
.footer-bottom a:hover {
  color: var(--cyan);
}

.footer-bottom {
  max-width: 1180px;
  margin: 0 auto;
  justify-content: space-between;
  gap: 18px;
  padding-top: 24px;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  color: #7f8a98;
  font-size: 13px;
  font-weight: 700;
}

@media (max-width: 860px) {
  .site-header {
    position: absolute;
  }

  .nav-links {
    display: none;
  }

  .hero {
    min-height: 92vh;
    align-items: end;
  }

  .hero-scrim {
    background:
      linear-gradient(90deg, rgba(5, 8, 13, 0.94), rgba(5, 8, 13, 0.5)),
      linear-gradient(180deg, rgba(5, 8, 13, 0.06), rgba(5, 8, 13, 0.94) 64%);
  }

  .hero-metrics,
  .section-heading,
  .feature-grid,
  .signal-panel,
  .demo-band,
  .footer-main {
    display: grid;
    grid-template-columns: 1fr;
  }

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

  .hero-metrics div {
    padding: 16px;
  }

  .feature-card {
    min-height: 0;
  }

  .feature-icon {
    margin-bottom: 34px;
  }

  .demo-band {
    align-items: start;
  }
}

@media (max-width: 520px) {
  .site-header {
    padding: 14px 16px;
  }

  .header-action {
    display: none;
  }

  .hero {
    padding: 104px 16px 38px;
  }

  h1 {
    font-size: 58px;
  }

  .button {
    width: 100%;
  }

  .section,
  .demo-band,
  .site-footer {
    padding-left: 16px;
    padding-right: 16px;
  }

  .footer-links {
    grid-template-columns: 1fr;
  }

  .footer-bottom {
    align-items: flex-start;
    flex-direction: column;
  }
}