:root {
  --bg: #07111f;
  --bg-soft: #0d1a2c;
  --surface: #ffffff;
  --surface-soft: #f4f7fb;
  --text: #101828;
  --muted: #667085;
  --line: #dbe3ee;
  --accent: #1769e0;
  --accent-light: #55a2ff;
  --white: #ffffff;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: Inter, Arial, Helvetica, sans-serif;
  color: var(--text);
  background: var(--surface);
  line-height: 1.6;
}

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

.container {
  width: min(1180px, calc(100% - 40px));
  margin: 0 auto;
}


/* HEADER */

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(7, 17, 31, .94);
  backdrop-filter: blur(14px);
  border-bottom: 1px solid rgba(255,255,255,.08);
}

.nav {
  min-height: 70px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
}

.brand-mark {
  width: 42px;
  height: 42px;
  display: grid;
  place-items: center;
  border-radius: 12px;
  background: linear-gradient(135deg, var(--accent), var(--accent-light));
  color: white;
  font-weight: 900;
  letter-spacing: -1px;
}

.brand strong,
.brand small {
  display: block;
  color: white;
}

.brand strong {
  font-size: 15px;
  letter-spacing: .08em;
}

.brand small {
  font-size: 10px;
  letter-spacing: .26em;
  opacity: .7;
}

nav {
  display: flex;
  gap: 28px;
}

nav a {
  color: #d5deea;
  font-size: 14px;
}

nav a:hover {
  color: white;
}


/* BUTTONS */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 0 22px;
  border-radius: 10px;
  background: var(--accent);
  color: white;
  font-weight: 700;
  border: 1px solid var(--accent);
  transition: .2s ease;
}

.btn:hover {
  transform: translateY(-1px);
  filter: brightness(1.08);
}

.btn-secondary {
  background: transparent;
  border-color: rgba(255,255,255,.25);
}

.btn-small {
  min-height: 40px;
  padding: 0 18px;
  font-size: 13px;
}

.btn-light {
  background: white;
  color: var(--accent);
  border-color: white;
}


/* HERO */

.hero {
  background:
    radial-gradient(circle at 78% 20%, rgba(23,105,224,.30), transparent 30%),
    linear-gradient(135deg, #07111f, #0a1830 65%, #0d2347);
  color: white;
  min-height: calc(100vh - 70px);
  display: flex;
  align-items: center;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.08fr .92fr;
  gap: 58px;
  align-items: center;
  padding: 62px 0;
}

.eyebrow {
  color: var(--accent-light);
  font-size: 12px;
  font-weight: 800;
  letter-spacing: .18em;
}

.hero h1 {
  margin: 16px 0 18px;
  font-size: clamp(48px, 5.8vw, 78px);
  line-height: .95;
  letter-spacing: -.05em;
}

.hero h1 span {
  color: var(--accent-light);
}

.hero-text {
  max-width: 660px;
  color: #c6d3e4;
  font-size: 17px;
}

.hero-actions {
  display: flex;
  gap: 12px;
  margin-top: 26px;
}

.hero-points {
  display: flex;
  flex-wrap: wrap;
  gap: 20px;
  margin-top: 24px;
  color: #aebed1;
  font-size: 13px;
}


/* NETWORK PANEL */

.hero-panel {
  background: rgba(255,255,255,.06);
  border: 1px solid rgba(255,255,255,.12);
  border-radius: 24px;
  padding: 24px;
  box-shadow: 0 30px 90px rgba(0,0,0,.25);
}

.network-visual {
  min-height: 400px;
  border-radius: 18px;
  background: rgba(5,13,25,.72);
  padding: 22px;
}

.status-row {
  display: flex;
  align-items: center;
  gap: 10px;
  color: #cbd6e5;
  font-size: 12px;
}

.status-row strong {
  margin-left: auto;
  color: #65d89b;
  font-size: 11px;
}

.status-dot {
  width: 8px;
  height: 8px;
  background: #46d88b;
  border-radius: 50%;
  box-shadow: 0 0 18px #46d88b;
}

.network-core {
  width: 104px;
  height: 104px;
  margin: 34px auto 30px;
  display: grid;
  place-items: center;
  border-radius: 50%;
  border: 1px solid rgba(85,162,255,.5);
  background: radial-gradient(circle, #1769e0, #0c2854);
  font-size: 30px;
  font-weight: 900;
  box-shadow: 0 0 70px rgba(23,105,224,.35);
}

.nodes {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
}

.node {
  background: rgba(255,255,255,.06);
  border: 1px solid rgba(255,255,255,.08);
  padding: 15px;
  border-radius: 12px;
}

.node span {
  color: var(--accent-light);
  font-size: 10px;
  font-weight: 800;
}

.node b,
.node small {
  display: block;
}

.node b {
  margin-top: 4px;
}

.node small {
  color: #91a5be;
}


/* SECTIONS */

.section {
  padding: 100px 0;
}

.section-heading {
  max-width: 760px;
  margin-bottom: 48px;
}

.section h2 {
  margin: 12px 0 18px;
  font-size: clamp(35px, 5vw, 56px);
  line-height: 1.07;
  letter-spacing: -.035em;
}

.section-heading p,
.lead,
.about-section p {
  color: var(--muted);
  font-size: 17px;
}


/* CARDS */

.cards {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 18px;
}

.card {
  border: 1px solid var(--line);
  border-radius: 18px;
  padding: 28px;
  min-height: 230px;
  background: white;
}

.card-number {
  color: var(--accent);
  font-weight: 800;
  font-size: 12px;
}

.card h3 {
  margin: 28px 0 10px;
  font-size: 21px;
}

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


/* ASSISTANT */

.assistant-section {
  background: var(--surface-soft);
}

.assistant-grid {
  display: grid;
  grid-template-columns: .9fr 1.1fr;
  gap: 80px;
  align-items: start;
}

.feature-list {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
}

.feature-list div {
  min-height: 145px;
  padding: 22px;
  background: white;
  border-radius: 14px;
  border: 1px solid var(--line);
}

.feature-list strong,
.feature-list span {
  display: block;
}

.feature-list strong {
  font-size: 17px;
  margin-bottom: 8px;
}

.feature-list span {
  color: var(--muted);
  font-size: 14px;
}


/* ABOUT */

.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 90px;
}


/* CONTACT */

.contact-section {
  padding-top: 30px;
}

.contact-box {
  background: linear-gradient(135deg, #0a1c36, #123a77);
  color: white;
  border-radius: 24px;
  padding: 55px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 40px;
}

.contact-box h2 {
  margin-bottom: 12px;
}

.contact-box p {
  color: #ccdaec;
}


/* FOOTER */

footer {
  margin-top: 100px;
  padding: 42px 0;
  background: var(--bg);
  color: #9fafc4;
}

.footer-grid {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 30px;
  font-size: 13px;
}


/* RESPONSIVE */

@media (max-width: 900px) {

  nav {
    display: none;
  }

  .hero {
    min-height: auto;
  }

  .hero-grid,
  .assistant-grid,
  .about-grid {
    grid-template-columns: 1fr;
  }

  .hero-grid {
    gap: 50px;
  }

  .cards {
    grid-template-columns: 1fr 1fr;
  }

  .contact-box {
    align-items: flex-start;
    flex-direction: column;
  }

}

@media (max-width: 600px) {

  .container {
    width: min(100% - 28px, 1180px);
  }

  .nav {
    min-height: 68px;
  }

  .brand strong {
    font-size: 13px;
  }

  .hero-grid {
    padding: 70px 0;
  }

  .hero h1 {
    font-size: 54px;
  }

  .hero-actions {
    flex-direction: column;
  }

  .hero-actions .btn {
    width: 100%;
  }

  .cards,
  .feature-list {
    grid-template-columns: 1fr;
  }

  .section {
    padding: 76px 0;
  }

  .contact-box {
    padding: 34px 24px;
  }

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

}