.site-header {
  position: sticky;
  top: 0;
  z-index: 40;
}
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  max-width: var(--max-width-wide);
  margin-inline: auto;
  padding-inline: var(--space-4);
  padding-block: 14px;
}
.brand-mark {
  display: inline-flex;
  align-items: center;
  gap: 10px;
}
.brand-initials {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  border: 1px solid var(--color-border-subtle);
  background: radial-gradient(circle at 0 0, #f5f5f7 0, #ffffff 45%, #f5f5f7 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.7rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
}
.brand-text {
  display: flex;
  flex-direction: column;
  line-height: 1.1;
}
.brand-primary {
  font-size: 0.92rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}
.brand-secondary {
  font-size: 0.7rem;
  letter-spacing: 0.24em;
  text-transform: uppercase;
  color: var(--color-text-muted);
}
.site-nav {
  display: flex;
  align-items: center;
}
.nav-list {
  display: flex;
  align-items: center;
  gap: 22px;
}
.nav-link {
  font-size: var(--font-size-xs);
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--color-text-muted);
  padding-block: 4px;
  position: relative;
}
.nav-link::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -6px;
  width: 100%;
  height: 1px;
  background: linear-gradient(90deg, rgba(76, 111, 255, 0.8), rgba(76, 111, 255, 0));
  transform-origin: left;
  transform: scaleX(0);
  transition: transform var(--transition-base);
}
.nav-link:hover::after,
.nav-link:focus-visible::after {
  transform: scaleX(1);
}
.nav-link[aria-current="page"] {
  color: var(--color-text);
}
.nav-link[aria-current="page"]::after {
  transform: scaleX(1);
}
.nav-cta-link {
  padding-inline: 16px;
  padding-block: 7px;
  border-radius: 999px;
  border: 1px solid rgba(12, 16, 32, 0.08);
  background-color: #ffffff;
  box-shadow: var(--shadow-xs);
}
.nav-cta-link:hover,
.nav-cta-link:focus-visible {
  border-color: rgba(12, 16, 32, 0.16);
}
.nav-toggle {
  display: none;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  border-radius: 999px;
  border: 1px solid rgba(12, 16, 32, 0.1);
  background-color: rgba(255, 255, 255, 0.9);
  cursor: pointer;
  gap: 5px;
}
.nav-toggle-bar {
  width: 18px;
  height: 1.5px;
  background-color: var(--color-text);
  transition: transform var(--transition-base), opacity var(--transition-base);
}
.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);
}
@media (max-width: 768px) {
  .site-nav {
    position: fixed;
    inset-inline: 0;
    top: 56px;
    background: rgba(255, 255, 255, 0.98);
    border-bottom: 1px solid var(--color-border-subtle);
    transform: translateY(-100%);
    opacity: 0;
    visibility: hidden;
    transition: transform var(--transition-base), opacity var(--transition-base), visibility var(--transition-base);
  }
  .site-nav.is-open {
    transform: translateY(0);
    opacity: 1;
    visibility: visible;
  }
  .nav-list {
    flex-direction: column;
    align-items: flex-start;
    gap: 10px;
    padding-inline: var(--space-4);
    padding-block: var(--space-4);
  }
  .nav-toggle {
    display: inline-flex;
  }
}
@media (max-width: 640px) {
  .header-inner {
    padding-inline: var(--space-3);
  }
}