.site-header {
  position: fixed;
  z-index: 20;
  top: 0;
  left: 0;
  right: 0;
  font-size: 1.95rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  min-height: 72px;
  padding: 16px clamp(20px, 5vw, 64px);
  color: #fcfffc;
  background: linear-gradient(180deg, var(--teal), var(--teal-dark));
  backdrop-filter: blur(12px);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-weight: 800;
  letter-spacing: 0;
}

.brand-mark {
  width: 28px;
  height: 28px;
  border: 2px solid currentColor;
  border-radius: 8px;
  position: relative;
}

.brand-mark::before,
.brand-mark::after {
  content: "";
  position: absolute;
  left: 5px;
  right: 5px;
  border-top: 2px solid currentColor;
}

.brand-mark::before { top: 9px; transform: rotate(-14deg); }
.brand-mark::after { bottom: 8px; transform: rotate(14deg); }

.nav-links {
  display: flex;
  align-items: center;
  gap: clamp(16px, 3vw, 34px);
  font-size: 1.5rem;
  font-weight: 700;
}

.nav-links a {
  opacity: 0.62;
  font-size: 1.3rem;
  transition: opacity 0.15s ease, font-size 0.15s ease;
}

.nav-links a:hover,
.nav-links a:focus-visible { opacity: 1; }

.nav-links a.nav-active {
  opacity: 1;
  font-size: 1.6rem;
  color: #ffffff;
  position: relative;
}

.nav-links a.nav-active::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: -4px;
  height: 2px;
  background: #93f2e6;
  border-radius: 2px;
}

.hero {
  position: relative;
  min-height: 86svh;
  display: flex;
  align-items: center;
  overflow: hidden;
  color: #f8fbf8;
  background: #0b1d21;
}

#motion-canvas,
.hero-shade {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
}

#motion-canvas { z-index: 0; }

.hero-shade {
  z-index: 1;
  background:
    radial-gradient(circle at 72% 48%, rgba(216, 166, 64, 0.18), transparent 28%),
    linear-gradient(90deg, rgba(5, 18, 19, 0.9) 0%, rgba(5, 18, 19, 0.72) 42%, rgba(5, 18, 19, 0.22) 100%),
    linear-gradient(180deg, rgba(5, 18, 19, 0.42) 0%, rgba(5, 18, 19, 0.1) 58%, rgba(247, 244, 238, 1) 100%);
}

.hero-content {
  position: relative;
  z-index: 2;
  width: min(1120px, calc(100% - 40px));
  margin: 0 auto;
  padding: clamp(96px, 14svh, 118px) 0 clamp(42px, 7svh, 64px);
}

.hero-copy {
  max-width: 690px;
  margin: 24px 0 0;
  color: rgba(248, 251, 248, 0.86);
  font-size: clamp(1.05rem, 1.6vw, 1.35rem);
}

.intro-band {
  padding: clamp(42px, 7vw, 80px) 0;
  background: var(--paper);
}

.intro-grid {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: clamp(32px, 7vw, 96px);
  align-items: end;
}

.intro-grid p:last-child,
.section-heading p,
.waitlist-copy p {
  margin: 18px 0 0;
  color: var(--ink-soft);
  font-size: 1.05rem;
}

.section-heading {
  max-width: 760px;
  margin-bottom: 36px;
}

.split {
  display: grid;
  grid-template-columns: 0.8fr 1.2fr;
  gap: clamp(34px, 7vw, 88px);
  align-items: start;
}

.sticky-heading {
  position: sticky;
  top: 104px;
  margin: 0;
}

.site-footer {
  padding: 28px 0;
  color: #dce6e0;
  background: #102224;
}

.footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.footer-inner span { font-weight: 800; }
.footer-inner a { color: #93f2e6; font-weight: 800; }

@media (max-width: 900px) {
  .site-header { position: absolute; }
  .nav-links { display: none; }
  .hero { min-height: 86svh; }
  .hero-content { padding-top: 112px; }
  .signal-strip, .intro-grid, .use-case-grid, .split, .example-row, .workflow-rail, .waitlist-grid {
    grid-template-columns: 1fr;
  }
  .signal-strip { max-width: 620px; }
  .sticky-heading { position: static; }
}