:root {
  --bg-top: #001a46;
  --bg-bottom: #000000;
  --text: #f2f7ff;
  --muted: #8fa6c4;
  --cyan: #33d6fc;
  --cyan-bright: #49f7fb;
  --cyan-deep: #00a6ff;
  --line: rgba(73, 247, 251, 0.22);
  --max: 960px;
  --pad: 24px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  color: var(--text);
  font-family: "Manrope", "PingFang SC", "Helvetica Neue", sans-serif;
  background: #000;
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }

.shell {
  width: 100%;
  max-width: var(--max);
  margin-left: auto;
  margin-right: auto;
  padding-left: var(--pad);
  padding-right: var(--pad);
}

/* —— Hero —— */
.hero {
  position: relative;
  min-height: 100vh;
  min-height: 100svh;
  overflow: hidden;
  background:
    radial-gradient(ellipse 80% 55% at 70% 15%, rgba(51, 214, 252, 0.18), transparent 55%),
    radial-gradient(ellipse 60% 40% at 15% 80%, rgba(0, 166, 255, 0.12), transparent 50%),
    linear-gradient(180deg, var(--bg-top) 0%, #000814 48%, var(--bg-bottom) 100%);
}
.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    radial-gradient(1px 1px at 20% 30%, rgba(255,255,255,0.45), transparent),
    radial-gradient(1px 1px at 60% 18%, rgba(73,247,251,0.55), transparent),
    radial-gradient(1px 1px at 80% 55%, rgba(255,255,255,0.35), transparent),
    radial-gradient(1.5px 1.5px at 35% 70%, rgba(73,247,251,0.4), transparent),
    radial-gradient(1px 1px at 10% 85%, rgba(255,255,255,0.25), transparent),
    radial-gradient(1px 1px at 90% 25%, rgba(255,255,255,0.3), transparent);
  opacity: 0.85;
  pointer-events: none;
  animation: drift 18s ease-in-out infinite alternate;
}
.hero::after {
  content: "";
  position: absolute;
  inset: auto 0 0;
  height: 160px;
  background: linear-gradient(180deg, transparent, rgba(0,0,0,0.85));
  pointer-events: none;
}
@keyframes drift {
  from { transform: translate3d(0, 0, 0); }
  to { transform: translate3d(-12px, 8px, 0); }
}

.hero-inner {
  position: relative;
  z-index: 2;
  display: flex;
  flex-direction: column;
  min-height: 100vh;
  min-height: 100svh;
  padding-top: 20px;
  padding-bottom: 64px;
}

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  flex-shrink: 0;
}
.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-weight: 800;
  letter-spacing: -0.03em;
  font-size: 18px;
  min-width: 0;
}
.brand-mark {
  flex: 0 0 auto;
  width: 28px;
  height: 28px;
  border-radius: 8px;
  background: linear-gradient(135deg, var(--cyan-bright), var(--cyan-deep));
  box-shadow: 0 0 18px rgba(51, 214, 252, 0.4);
}
.nav {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 16px 20px;
  color: var(--muted);
  font-size: 14px;
  font-weight: 600;
}
.nav a:hover { color: var(--cyan); }

.hero-copy {
  flex: 1;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  text-align: center;
  width: 100%;
  max-width: 640px;
  margin: 0 auto;
  padding: 48px 0 24px;
}
.hero-brand {
  margin: 0 0 16px;
  width: 100%;
  font-family: "Syne", "Manrope", sans-serif;
  font-size: clamp(40px, 11vw, 72px);
  font-weight: 800;
  letter-spacing: -0.04em;
  line-height: 1.05;
  background: linear-gradient(90deg, #fff 0%, #fff 52%, #CDDFDE 58%, #49f7fb 100%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  animation: brandIn 0.9s ease both;
}
.hero h1 {
  margin: 0 0 14px;
  font-family: "Syne", "Manrope", sans-serif;
  font-size: clamp(24px, 5.5vw, 38px);
  font-weight: 700;
  letter-spacing: -0.03em;
  line-height: 1.2;
  animation: rise 0.8s 0.1s ease both;
}
.hero p.lead {
  margin: 0 0 28px;
  max-width: 34em;
  color: var(--muted);
  font-size: 16px;
  animation: rise 0.8s 0.2s ease both;
}
.cta-row {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 12px;
  animation: rise 0.8s 0.3s ease both;
}
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 0 22px;
  border-radius: 999px;
  font-weight: 700;
  font-size: 15px;
  border: 1px solid transparent;
  transition: transform 0.2s ease, box-shadow 0.2s ease, background 0.2s ease;
}
.btn:hover { transform: translateY(-1px); }
.btn-primary {
  color: #041018;
  background: linear-gradient(90deg, #00d2dd, #00a6ff);
  box-shadow: 0 10px 40px rgba(0, 166, 255, 0.35);
}
.btn-ghost {
  color: #7cebf0;
  border-color: #00d2dd;
  background: transparent;
}

@keyframes brandIn {
  from { opacity: 0; transform: translateY(16px) scale(0.98); filter: blur(4px); }
  to { opacity: 1; transform: none; filter: none; }
}
@keyframes rise {
  from { opacity: 0; transform: translateY(18px); }
  to { opacity: 1; transform: none; }
}

/* —— Sections —— */
.section {
  padding: 88px 0;
  background: #000;
}
.section-head {
  margin: 0 0 36px;
  max-width: 560px;
}
.section-head h2 {
  margin: 0 0 10px;
  font-family: "Syne", "Manrope", sans-serif;
  font-size: clamp(28px, 4vw, 36px);
  letter-spacing: -0.04em;
}
.section-head p {
  margin: 0;
  color: var(--muted);
}

.feature-list {
  display: grid;
  gap: 18px;
}
.feature {
  display: grid;
  grid-template-columns: 88px 1fr;
  gap: 20px;
  align-items: start;
  padding: 22px 0;
  border-top: 1px solid var(--line);
}
.feature:last-child { border-bottom: 1px solid var(--line); }
.feature-index {
  font-family: "Syne", sans-serif;
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.14em;
  color: var(--cyan);
  padding-top: 6px;
}
.feature h3 {
  margin: 0 0 8px;
  font-size: 22px;
  letter-spacing: -0.03em;
}
.feature p {
  margin: 0;
  color: var(--muted);
  max-width: 52em;
}

.band {
  padding: 72px 0;
  background:
    radial-gradient(ellipse 70% 80% at 50% 0%, rgba(51, 214, 252, 0.1), transparent 60%),
    #02060f;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  text-align: center;
}
.band h2 {
  margin: 0 0 12px;
  font-family: "Syne", "Manrope", sans-serif;
  font-size: clamp(26px, 4vw, 34px);
  letter-spacing: -0.04em;
}
.band p {
  margin: 0 auto 24px;
  max-width: 36em;
  color: var(--muted);
}
.band-cta { justify-content: center; }

.site-footer {
  padding: 40px 0 48px;
  background: #000;
  color: var(--muted);
  font-size: 13px;
}
.site-footer .shell {
  display: flex;
  flex-wrap: wrap;
  gap: 16px 28px;
  justify-content: space-between;
  align-items: center;
}
.site-footer nav {
  display: flex;
  gap: 18px;
}
.site-footer a:hover { color: var(--cyan); }

@media (max-width: 720px) {
  :root { --pad: 20px; }
  .nav { gap: 12px 14px; font-size: 13px; }
  .hero-inner { padding-bottom: 48px; }
  .hero-copy { padding-top: 36px; }
  .feature {
    grid-template-columns: 1fr;
    gap: 8px;
  }
  .section { padding: 64px 0; }
  .cta-row .btn { width: 100%; }
}