/* ==========================================================================
   Header and mobile menu. The header is plain and sticky by
   default (docs and legal pages) and fixed over the hero on the landing page.
   Small screens get a full-screen menu dialog (site.js).
   ========================================================================== */

/* ---------- Header ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  gap: 1rem;
  min-height: var(--header-height);
  padding-inline: var(--margin);
  border-bottom: 1px solid transparent;
  background: rgb(8 8 10 / 0);
  transition: background-color var(--duration-normal) ease, border-color var(--duration-normal) ease;
}

/* Landing page: fixed over the hero, outside the smooth-scroll wrapper. */
.site-header--fixed {
  position: fixed;
  inset: 0 0 auto;
}

.site-header.is-solid {
  border-bottom-color: var(--hairline);
  background: rgb(8 8 10 / 0.72);
  -webkit-backdrop-filter: blur(14px) saturate(140%);
  backdrop-filter: blur(14px) saturate(140%);
}

.site-header__progress {
  position: absolute;
  inset: auto 0 -1px;
  height: 2px;
  background: var(--accent);
  transform: scaleX(0);
  transform-origin: left;
}

.wordmark {
  font-family: var(--font-display);
  font-size: 1.375rem;
  font-weight: 700;
  letter-spacing: 0.01em;
  line-height: 1;
  text-decoration: none;
  text-transform: uppercase;
}

.site-nav {
  display: flex;
  gap: 1.5rem;
  margin: 0;
  padding: 0;
  list-style: none;
}

.site-nav a {
  color: var(--muted);
  font-size: 0.75rem;
  letter-spacing: 0.06em;
  text-decoration: none;
  text-transform: uppercase;
}

.site-nav a:hover {
  color: var(--ink);
  text-decoration: underline;
  text-decoration-color: var(--accent);
  text-decoration-thickness: 2px;
  text-underline-offset: 0.3em;
}

.site-header .button {
  justify-self: end;
}

@media (max-width: 860px) {
  .site-header {
    grid-template-columns: 1fr auto;
  }

  .site-header nav {
    display: none;
  }
}


.site-header__actions {
  display: flex;
  align-items: center;
  justify-self: end;
  gap: 0.5rem;
}

/* ---------- Mobile menu ---------- */
.menu-toggle {
  display: none;
  min-height: 2.25rem;
  padding: 0 0.9rem;
  border: 1px solid var(--hairline-strong);
  border-radius: 999px;
  background: transparent;
  color: inherit;
  font: 700 0.75rem/1 var(--font-body);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  cursor: pointer;
}

@media (max-width: 860px) {
  .menu-toggle {
    display: inline-flex;
    align-items: center;
  }
}

@media (max-width: 480px) {
  .site-header__actions .button {
    display: none;
  }
}

.menu {
  width: 100%;
  max-width: none;
  height: 100%;
  max-height: none;
  margin: 0;
  padding: 0 var(--margin) var(--margin);
  border: 0;
  background: var(--paper);
  color: var(--ink);
}

.menu[open] {
  display: grid;
  grid-template-rows: auto 1fr auto;
}

.menu::backdrop {
  background: var(--paper);
}

.menu__bar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  min-height: var(--header-height);
}

.menu__bar .menu-toggle {
  display: inline-flex;
  align-items: center;
}

.menu__list {
  display: grid;
  align-content: center;
  gap: 0.25rem;
  margin: 0;
  padding: 0;
  list-style: none;
}

.menu__list li {
  overflow: hidden;
}

.menu__link {
  display: block;
  font-family: var(--font-display);
  font-size: clamp(2.5rem, 12vw, 4rem);
  font-weight: 700;
  line-height: 1;
  text-decoration: none;
  text-transform: uppercase;
}

.menu__link:hover,
.menu__link:focus-visible {
  color: var(--accent);
}

.menu__cta {
  justify-self: start;
}

@media (prefers-reduced-motion: no-preference) {
  .menu[open] {
    animation: menu-in 400ms var(--ease-out) both;
  }

  .menu[open] .menu__link {
    animation: menu-rise 800ms var(--ease-out) both;
    animation-delay: calc(var(--i) * 60ms + 120ms);
  }
}

@keyframes menu-in {
  from {
    clip-path: inset(0 0 100% 0);
  }

  to {
    clip-path: inset(0);
  }
}

@keyframes menu-rise {
  from {
    translate: 0 105%;
  }
}