:root {
  --ink: #0b1830;
  --muted: #4f6077;
  --paper: #f5efe4;
  --white: #ffffff;
  --oxide: #c4452d;
  --rust: #8f2819;
  --gold: #dbad52;
  --sky: #8bc3d6;
  --line: rgba(11, 24, 48, 0.1);
  --shadow: 0 24px 60px rgba(11, 24, 48, 0.12);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  color: var(--ink);
  background:
    radial-gradient(circle at top right, rgba(139, 195, 214, 0.22), transparent 22%),
    radial-gradient(circle at top left, rgba(219, 173, 82, 0.14), transparent 20%),
    linear-gradient(180deg, #fbf6ee 0%, #f1e6d3 100%);
  font-family: "IBM Plex Sans", "Segoe UI", sans-serif;
}

.page-shell {
  width: min(1240px, calc(100vw - 36px));
  margin: 18px auto 32px;
}

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 14px 0 24px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 14px;
}

.brand-mark {
  width: 48px;
  height: 48px;
  display: grid;
  place-items: center;
  border-radius: 50%;
  overflow: hidden;
  background: rgba(255, 255, 255, 0.14);
  box-shadow: var(--shadow);
}

.brand-mark img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.brand strong,
h1, h2, h3 {
  font-family: "Sora", "Segoe UI", sans-serif;
}

.brand strong {
  display: block;
  font-size: 18px;
}

.brand span {
  display: block;
  color: var(--muted);
  font-size: 13px;
  margin-top: 2px;
}

.nav {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
}

.nav a,
.footer-links a,
.btn {
  text-decoration: none;
}

.nav a {
  color: var(--ink);
  font-weight: 600;
}

.hero {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 28px;
  align-items: stretch;
  padding: 18px 0 32px;
}

.hero-copy,
.hero-visual,
.feature-card,
.tech-card,
.scenario,
.step {
  border-radius: 28px;
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.72);
  backdrop-filter: blur(12px);
  box-shadow: var(--shadow);
}

.hero-copy {
  padding: 36px;
}

.kicker {
  margin: 0 0 12px;
  color: var(--oxide);
  text-transform: uppercase;
  letter-spacing: 0.14em;
  font-size: 12px;
  font-weight: 700;
}

h1 {
  margin: 0 0 18px;
  font-size: clamp(38px, 5vw, 66px);
  line-height: 0.98;
}

.lede {
  margin: 0;
  color: var(--muted);
  font-size: 19px;
  line-height: 1.7;
  max-width: 700px;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 30px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 14px 18px;
  border-radius: 999px;
  font-weight: 700;
}

.btn.solid {
  color: var(--white);
  background: linear-gradient(160deg, var(--oxide), var(--rust));
}

.btn.ghost {
  color: var(--ink);
  border: 1px solid rgba(11, 24, 48, 0.12);
  background: rgba(255, 255, 255, 0.7);
}

.hero-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 26px;
}

.hero-tags span {
  padding: 10px 14px;
  border-radius: 999px;
  background: rgba(11, 24, 48, 0.06);
  border: 1px solid rgba(11, 24, 48, 0.08);
  color: var(--ink);
  font-weight: 600;
  font-size: 14px;
}

.hero-visual {
  padding: 28px;
  position: relative;
  overflow: hidden;
  background:
    radial-gradient(circle at top left, rgba(219, 173, 82, 0.22), transparent 34%),
    linear-gradient(155deg, #13284d 0%, #0b1830 100%);
  color: var(--white);
}

.hero-visual::after {
  content: "";
  position: absolute;
  inset: auto -40px -60px auto;
  width: 220px;
  height: 220px;
  border-radius: 36px;
  transform: rotate(20deg);
  background: linear-gradient(180deg, rgba(196, 69, 45, 0.95), rgba(219, 173, 82, 0.5));
}

.product-stage {
  position: relative;
  z-index: 2;
  border-radius: 24px;
  background: rgba(255, 255, 255, 0.12);
  border: 1px solid rgba(255, 255, 255, 0.14);
  padding: 16px;
  box-shadow: 0 22px 48px rgba(0, 0, 0, 0.22);
}

.hero-product {
  display: block;
  width: min(100%, 320px);
  margin: 0 auto;
  border-radius: 20px;
  background: rgba(255, 255, 255, 0.96);
}

.hero-specs {
  position: relative;
  z-index: 2;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
  margin-top: 18px;
}

.hero-spec {
  border-radius: 18px;
  padding: 14px 16px;
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.08);
}

.hero-spec small {
  display: block;
  font-size: 12px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: rgba(255, 255, 255, 0.72);
  margin-bottom: 8px;
}

.hero-spec strong {
  display: block;
  font-size: 18px;
  line-height: 1.35;
}

.signal-map {
  position: relative;
  z-index: 2;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
  margin-top: 28px;
}

.signal-line {
  position: absolute;
  left: 12%;
  right: 12%;
  height: 2px;
  background: linear-gradient(90deg, rgba(255,255,255,0.2), rgba(219,173,82,0.85), rgba(255,255,255,0.2));
}

.signal-node {
  position: relative;
  z-index: 1;
  width: 108px;
  height: 108px;
  border-radius: 50%;
  display: grid;
  place-items: center;
  text-align: center;
  padding: 16px;
  background: rgba(255, 255, 255, 0.1);
  border: 1px solid rgba(255, 255, 255, 0.12);
  font-weight: 700;
}

.signal-node.accent {
  background: linear-gradient(160deg, rgba(196, 69, 45, 0.95), rgba(219, 173, 82, 0.85));
}

.section {
  padding: 26px 0;
}

.section-heading {
  margin-bottom: 24px;
}

h2 {
  margin: 0;
  font-size: clamp(30px, 4vw, 48px);
  line-height: 1.05;
}

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

.feature-card,
.tech-card,
.scenario {
  padding: 24px;
}

.feature-card h3,
.tech-card h3,
.scenario h3,
.step h3 {
  margin: 0 0 10px;
  font-size: 22px;
}

.feature-card p,
.scenario p,
.step p,
.tech-card p,
.tech-card li,
.footer p {
  margin: 0;
  color: var(--muted);
  line-height: 1.7;
}

.contrast {
  padding: 34px;
  border-radius: 36px;
  background:
    radial-gradient(circle at top right, rgba(219, 173, 82, 0.18), transparent 28%),
    linear-gradient(155deg, #10203d 0%, #081222 100%);
  color: var(--white);
  box-shadow: var(--shadow);
}

.contrast .section-heading .kicker { color: #ffd66c; }
.contrast h2,
.contrast h3 { color: var(--white); }
.contrast p { color: rgba(255, 255, 255, 0.78); }

.timeline {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 18px;
}

.step {
  padding: 22px;
  background: rgba(255, 255, 255, 0.08);
  border-color: rgba(255, 255, 255, 0.12);
}

.step span {
  display: inline-grid;
  place-items: center;
  width: 44px;
  height: 44px;
  margin-bottom: 16px;
  border-radius: 14px;
  background: linear-gradient(160deg, rgba(196, 69, 45, 1), rgba(219, 173, 82, 0.9));
  font-family: "Sora", sans-serif;
  font-weight: 800;
}

.tech-layout {
  display: grid;
  grid-template-columns: 1fr 1fr 0.8fr;
  gap: 18px;
}

.tech-card ul {
  margin: 14px 0 0;
  padding-left: 18px;
}

.tech-card li { margin-bottom: 8px; }

.tech-card.highlight {
  background: linear-gradient(165deg, rgba(196, 69, 45, 0.08), rgba(219, 173, 82, 0.18));
}

.version {
  margin: 14px 0 10px;
  font-size: 32px;
  color: var(--oxide);
  font-family: "Sora", sans-serif;
  font-weight: 800;
}

.scenario {
  background: linear-gradient(165deg, rgba(255,255,255,0.88), rgba(255,255,255,0.62));
}

.footer {
  display: flex;
  justify-content: space-between;
  gap: 20px;
  align-items: center;
  padding: 28px 0 12px;
}

.footer-links {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
}

.footer-links a {
  color: var(--ink);
  font-weight: 700;
}

code {
  padding: 2px 6px;
  border-radius: 8px;
  background: rgba(11, 24, 48, 0.08);
  font-family: Consolas, monospace;
  font-size: 0.95em;
}

@media (max-width: 980px) {
  .hero,
  .feature-grid,
  .scenario-grid,
  .timeline,
  .tech-layout {
    grid-template-columns: 1fr;
  }

  .hero-specs {
    grid-template-columns: 1fr;
  }

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

  .nav {
    gap: 10px 16px;
  }
}