.scroll-progress {
  position: fixed;
  inset: 0 auto auto 0;
  z-index: 900;
  width: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--primary), var(--teal), var(--coral));
}

.site-header {
  position: fixed;
  inset: 0 0 auto;
  z-index: 800;
  height: var(--header-height);
  background: rgba(255, 255, 255, .86);
  border-bottom: 1px solid rgba(226, 232, 240, .75);
  backdrop-filter: blur(18px);
}

.site-header.is-scrolled {
  box-shadow: var(--shadow-sm);
}

.site-header__inner {
  display: flex;
  width: min(100% - 24px, 1180px);
  height: 100%;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
  margin-inline: auto;
}

.brand {
  display: inline-flex;
  min-width: 0;
  align-items: center;
  gap: .7rem;
  color: var(--ink);
}

.brand:hover {
  color: var(--ink);
}

.brand__mark {
  width: 40px;
  height: 40px;
  flex: 0 0 auto;
}

.brand__text {
  display: grid;
  min-width: 0;
  line-height: 1.1;
}

.brand__name {
  color: var(--ink);
  font-weight: 900;
  white-space: nowrap;
}

.brand__tagline {
  color: var(--subtle);
  font-size: .78rem;
  white-space: nowrap;
}

.desktop-nav {
  display: none;
  align-items: center;
  gap: .2rem;
}

.desktop-nav__link,
.nav-menu__trigger {
  display: inline-flex;
  min-height: 44px;
  align-items: center;
  gap: .35rem;
  padding: .6rem .8rem;
  color: var(--ink);
  background: transparent;
  border: 0;
  border-radius: var(--radius);
  font-weight: 750;
}

.desktop-nav__link:hover,
.desktop-nav__link.is-active,
.nav-menu__trigger:hover,
.nav-menu.is-open .nav-menu__trigger {
  color: var(--primary);
  background: var(--primary-50);
}

.nav-menu {
  position: relative;
}

.nav-menu__trigger svg {
  width: 16px;
  height: 16px;
}

.nav-menu__panel {
  position: absolute;
  top: calc(100% + 12px);
  left: 50%;
  width: min(720px, calc(100vw - 32px));
  padding: var(--space-4);
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  opacity: 0;
  pointer-events: none;
  transform: translate(-50%, 8px);
  transition: opacity .18s var(--ease), transform .18s var(--ease);
}

.nav-menu__panel--compact {
  width: min(520px, calc(100vw - 32px));
}

.nav-menu.is-open .nav-menu__panel,
.nav-menu:hover .nav-menu__panel,
.nav-menu:focus-within .nav-menu__panel {
  opacity: 1;
  pointer-events: auto;
  transform: translate(-50%, 0);
}

.nav-menu__grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: var(--space-2);
}

.nav-menu__grid--compact {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.nav-tool {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: .7rem;
  min-height: 60px;
  align-items: center;
  padding: .7rem;
  color: var(--ink);
  border-radius: var(--radius);
}

.nav-tool:hover {
  color: var(--ink);
  background: var(--surface-soft);
}

.nav-tool__icon {
  display: grid;
  width: 36px;
  height: 36px;
  place-items: center;
  color: var(--tool-color);
  background: color-mix(in srgb, var(--tool-color) 12%, #fff);
  border-radius: var(--radius);
}

.nav-tool__icon svg {
  width: 20px;
  height: 20px;
}

.nav-tool__name,
.nav-tool__desc {
  display: block;
}

.nav-tool__name {
  font-size: .92rem;
  font-weight: 850;
}

.nav-tool__desc {
  color: var(--subtle);
  font-size: .78rem;
  line-height: 1.25;
}

.nav-menu__all {
  display: flex;
  min-height: 44px;
  align-items: center;
  justify-content: center;
  margin-top: var(--space-3);
  color: var(--primary);
  background: var(--primary-50);
  border-radius: var(--radius);
  font-weight: 850;
}

.site-header__actions {
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

.theme-toggle,
.hamburger {
  display: inline-grid;
  width: 44px;
  height: 44px;
  place-items: center;
  color: var(--ink);
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.theme-toggle svg {
  width: 20px;
  height: 20px;
  fill: none;
  stroke: currentColor;
  stroke-width: 2;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.theme-toggle__moon {
  display: none;
}

.hamburger {
  gap: 4px;
}

.hamburger span {
  width: 20px;
  height: 2px;
  background: currentColor;
  border-radius: 2px;
  transition: transform .18s var(--ease), opacity .18s var(--ease);
}

.hamburger.is-open span:nth-child(1) {
  transform: translateY(6px) rotate(45deg);
}

.hamburger.is-open span:nth-child(2) {
  opacity: 0;
}

.hamburger.is-open span:nth-child(3) {
  transform: translateY(-6px) rotate(-45deg);
}

.site-header__cta {
  display: none;
}

.mobile-nav {
  position: fixed;
  inset: var(--header-height) 0 0;
  z-index: 790;
  overflow-y: auto;
  background: rgba(255, 255, 255, .98);
  border-top: 1px solid var(--line);
}

.mobile-nav__inner {
  display: grid;
  gap: var(--space-5);
  width: min(100% - 32px, 560px);
  margin: 0 auto;
  padding: var(--space-5) 0 96px;
}

.mobile-nav__group {
  display: grid;
  gap: var(--space-2);
}

.mobile-nav__label {
  margin: 0 0 var(--space-1);
  color: var(--subtle);
  font-size: .8rem;
  font-weight: 850;
  text-transform: uppercase;
}

.mobile-nav__link {
  display: flex;
  min-height: 48px;
  align-items: center;
  gap: var(--space-3);
  padding: .75rem;
  color: var(--ink);
  background: var(--surface-soft);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  font-weight: 800;
}

.mobile-nav__icon {
  display: grid;
  width: 32px;
  height: 32px;
  place-items: center;
  color: var(--tool-color);
}

.mobile-nav__icon svg {
  width: 20px;
  height: 20px;
}

@media (min-width: 980px) {
  .desktop-nav {
    display: flex;
  }

  .hamburger {
    display: none;
  }

  .site-header__cta {
    display: inline-flex;
  }
}