section { padding: 0 20px; }
.wrap { max-width: var(--container); margin: 0 auto; }

.grain {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 999;
  opacity: 0.025;
  mix-blend-mode: overlay;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='120' height='120'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='2' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
}

/* ---------- nav ---------- */
.nav {
  position: fixed;
  top: 16px;
  left: 0; right: 0;
  z-index: 100;
  display: flex;
  justify-content: center;
  padding: 0 20px;
}
.nav__inner {
  width: 100%;
  max-width: 760px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 10px 10px 10px 22px;
  border-radius: 999px;
  background: color-mix(in srgb, var(--surface) 72%, transparent);
  border: 1px solid var(--line);
  backdrop-filter: blur(20px) saturate(160%);
  -webkit-backdrop-filter: blur(20px) saturate(160%);
  transition: background 300ms var(--ease-out), box-shadow 300ms var(--ease-out);
}
.nav.is-scrolled .nav__inner {
  background: color-mix(in srgb, var(--surface) 90%, transparent);
  box-shadow: 0 8px 30px rgba(0, 0, 0, 0.08);
}
.nav__brand { display: flex; align-items: center; }
.nav__mark { height: 22px; width: auto; display: block; }
.nav__links { display: flex; align-items: center; gap: 22px; }
.nav__links a:not(.nav__cta) {
  font-size: 14px;
  color: var(--ink-dim);
  transition: color 150ms ease;
}
.nav__links a:not(.nav__cta):hover { color: var(--ink); }

@media (max-width: 860px) {
  .nav__links a:not(.nav__cta) { display: none; }
}

/* ---------- footer ---------- */
.footer {
  max-width: var(--container);
  margin: 0 auto;
  padding: 40px 20px 70px;
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  flex-wrap: wrap;
  gap: 32px;
  border-top: 1px solid var(--line);
}
.footer__mark { width: 150px; height: auto; display: block; }
.footer__tagline { font-size: 13px; color: var(--ink-dim); margin-top: 10px; max-width: 28ch; }
.footer__links { display: flex; gap: 40px; flex-wrap: wrap; }
.footer__group { display: flex; flex-direction: column; gap: 8px; }
.footer__group h4 { font-size: 12px; font-weight: 700; text-transform: uppercase; letter-spacing: 0.1em; color: var(--ink-dim); margin-bottom: 4px; }
.footer__group a { font-size: 14px; color: var(--ink); }
.footer__group a:hover { color: var(--signal); }