.dv-header{position:sticky;top:0;z-index:40;background:radial-gradient(circle at top left,rgba(15,23,42,0.94),rgba(8,13,26,0.98));backdrop-filter:blur(18px);border-bottom:1px solid rgba(15,23,42,0.9)}.dv-header-inner{display:flex;align-items:center;justify-content:space-between;gap:var(--space-6);padding-top:var(--space-3);padding-bottom:var(--space-3)}.dv-header-brand{display:flex;flex-direction:column;gap:0.1rem}.dv-header-brand-mark{font-family:var(--font-serif-display);font-size:1.25rem;letter-spacing:0.26em;text-transform:uppercase}.dv-header-tagline{font-family:var(--font-sans-body);font-size:0.7rem;letter-spacing:0.18em;text-transform:uppercase;color:var(--color-text-muted)}.dv-header-nav{display:flex;align-items:center;gap:var(--space-4)}.dv-header-nav-list{display:flex;align-items:center;gap:var(--space-6);font-family:var(--font-sans-body);font-size:var(--text-xs);text-transform:uppercase;letter-spacing:0.16em;color:var(--color-text-muted)}.dv-header-nav-link{position:relative;padding-bottom:0.15rem;transition:color var(--transition-normal)}.dv-header-nav-link::after{content:"";position:absolute;left:0;bottom:0;width:0;height:1px;background:linear-gradient(90deg,var(--color-primary),#f97316);transition:width var(--transition-normal)}.dv-header-nav-link:hover,.dv-header-nav-link:focus-visible{color:var(--color-text)}.dv-header-nav-link:hover::after,.dv-header-nav-link:focus-visible::after{width:100%}.dv-header-nav-cta .dv-header-nav-link-cta{padding:0.5rem 1.4rem;border-radius:var(--radius-pill);border:1px solid rgba(245,158,11,0.8);background:linear-gradient(135deg,var(--color-primary),#f97316);color:#020617;box-shadow:0 16px 40px rgba(245,158,11,0.45)}.dv-header-nav-cta .dv-header-nav-link-cta::after{display:none}.dv-header-nav-cta .dv-header-nav-link-cta:hover,.dv-header-nav-cta .dv-header-nav-link-cta:focus-visible{background:linear-gradient(135deg,#fbbf24,#f97316);transform:translateY(-1px)}.nav-toggle{display:none;align-items:center;justify-content:center;width:40px;height:40px;border-radius:999px;border:1px solid rgba(148,163,184,0.6);background:rgba(15,23,42,0.9);transition:background-color var(--transition-normal),border-color var(--transition-normal),transform var(--transition-fast)}.nav-toggle-line{width:18px;height:1px;border-radius:999px;background:var(--color-neutral-100);transition:transform var(--transition-fast),opacity var(--transition-fast)}.nav-toggle:focus-visible{box-shadow:var(--shadow-outline)}.nav-toggle.is-active{background:rgba(15,23,42,1);border-color:var(--color-primary)}.nav-toggle.is-active .nav-toggle-line:first-child{transform:translateY(3px) rotate(45deg)}.nav-toggle.is-active .nav-toggle-line:last-child{transform:translateY(-3px) rotate(-45deg)}@media (max-width:960px){.dv-header-nav-list{position:fixed;inset-inline:var(--space-4);top:4.25rem;display:flex;flex-direction:column;align-items:flex-start;gap:var(--space-4);padding:var(--space-5);border-radius:var(--radius-lg);background:radial-gradient(circle at top,rgba(15,23,42,0.98),#020617 70%);border:1px solid rgba(148,163,184,0.6);box-shadow:var(--shadow-soft);transform-origin:top right;transform:scale(0.96);opacity:0;pointer-events:none;visibility:hidden;transition:opacity var(--transition-normal),transform var(--transition-normal),visibility var(--transition-normal)}.dv-header-nav-list.is-open{opacity:1;visibility:visible;pointer-events:auto;transform:scale(1)}.dv-header-nav-item{width:100%}.dv-header-nav-link,.dv-header-nav-link-cta{display:flex;justify-content:space-between;align-items:center;width:100%}.dv-header-nav-cta .dv-header-nav-link-cta{justify-content:center}.nav-toggle{display:flex}.dv-header-inner{padding-top:var(--space-3);padding-bottom:var(--space-3)}}@media (max-width:640px){.dv-header-brand-mark{font-size:1.05rem}.dv-header-tagline{display:none}}

/* checklist: hamburger X */
.nav-toggle {
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 5px;
  width: 44px;
  height: 44px;
}
.nav-toggle[aria-expanded="true"] .nav-toggle__bar:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}
.nav-toggle[aria-expanded="true"] .nav-toggle__bar:nth-child(2) {
  opacity: 0;
}
.nav-toggle[aria-expanded="true"] .nav-toggle__bar:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}
.nav-toggle__bar {
  display: block;
  width: 22px;
  height: 2px;
  border-radius: 999px;
  background: var(--color-neutral-100);
  transition: transform 0.2s ease, opacity 0.2s ease;
}

@media (max-width: 960px) {
  .dv-header-nav-list {
    background: linear-gradient(180deg, #0f172a 0%, #020617 70%);
    max-height: calc(100vh - 6rem);
    overflow-y: auto;
    overscroll-behavior: contain;
  }
  .dv-header-nav-link,
  .dv-header-nav-link-cta {
    min-height: 44px;
  }
}

@media (max-width: 640px) {
  .dv-header-inner {
    gap: var(--space-3);
  }
  .dv-header-brand-mark {
    letter-spacing: 0.16em;
  }
}