/* ==========================================================================
   nav.css — floating pill header and mobile drawer

   The header is a fixed pill that sits over the page with no background of
   its own. Once the reader scrolls, a glass layer fades in behind it via a
   ::before pseudo-element, so the pill gains a surface without the bar
   itself shifting position.
   ========================================================================== */

.site-nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: var(--ds-z-header);
  width: var(--ds-container);
  margin-inline: auto;
  padding-block: var(--ds-space-2) 0;
  pointer-events: none;
}

.site-nav > * {
  pointer-events: auto;
}

@media (min-width: 768px) {
  .site-nav {
    width: min(100% - 96px, 1140px);
  }
}

@media (min-width: 1560px) {
  .site-nav {
    width: min(100% - 120px, 1280px);
  }
}

.site-nav__inner {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--ds-space-4);
  margin-inline: auto;
  padding: var(--ds-space-1) var(--ds-space-1) var(--ds-space-1) var(--ds-space-4);
  border: var(--ds-border-width) solid transparent;
  border-radius: 16px;
  background: transparent;
}

.site-nav.has-open-drawer {
  z-index: calc(var(--ds-z-drawer) + 1);
}

/* The glass surface. Kept on a pseudo-element so it can cross-fade without
   the bar resizing. `visibility` is delayed on the way out so the fade is
   allowed to finish before the layer stops being painted. */
.site-nav__inner::before {
  content: '';
  position: absolute;
  inset: -1px;
  z-index: -1;
  border-radius: 16px;
  border: var(--ds-border-width) solid rgba(255, 255, 255, 0.2);
  background-color: rgba(25, 35, 50, 0.64);
  backdrop-filter: blur(var(--ds-blur-glass));
  -webkit-backdrop-filter: blur(var(--ds-blur-glass));
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  transition: opacity 400ms var(--ds-ease-in-out), visibility 0s 400ms;
}

.site-nav.is-scrolled .site-nav__inner::before {
  background-color: rgba(25, 35, 50, 0.72);
  opacity: 1;
  visibility: visible;
  transition: opacity 400ms var(--ds-ease-in-out), visibility 0s;
}

/* --- brand ---------------------------------------------------------------- */

.site-nav__lead {
  display: flex;
  align-items: center;
  gap: var(--ds-space-2);
  min-width: 0;
}

.site-nav__brand {
  display: inline-flex;
  align-items: center;
  gap: var(--ds-space-2);
  min-width: 0;
  color: var(--ds-color-text-primary);
  text-decoration: none;
}

.site-nav__brand:hover {
  color: var(--ds-color-text-primary);
}

/* Sized by height so the header pill keeps its rhythm; the lockup is about
   5.9:1, so the width follows. Held back a little on narrow screens, where the
   nav also has the menu toggle and the CTA to fit in. */
.site-nav__logo {
  height: 22px;
  width: auto;
  flex: 0 0 auto;
}

/* The lockup stacks two lines of text inside its height, so it needs a little
   more than a bare mark would to stay legible. */
@media (min-width: 600px) {
  .site-nav__logo {
    height: 32px;
  }
}

/* --- links ---------------------------------------------------------------- */

.site-nav__links {
  display: none;
  align-items: center;
  gap: var(--ds-space-1);
}

.site-nav__link {
  position: relative;
  padding: var(--ds-space-2) var(--ds-space-3);
  border-radius: var(--ds-radius-pill);
  color: rgba(255, 255, 255, 0.82);
  font-size: 14px;
  font-weight: 500;
  text-decoration: none;
  white-space: nowrap;
  transition: color var(--ds-duration-base) var(--ds-ease-standard),
    background-color var(--ds-duration-base) var(--ds-ease-standard);
}

.site-nav__link:hover,
.site-nav__link[aria-current='page'] {
  color: var(--ds-color-text-primary);
  background-color: var(--ds-color-bg-hover);
}

/* --- actions -------------------------------------------------------------- */

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

.site-nav__signin {
  display: none;
  align-items: center;
  gap: var(--ds-space-1);
  padding: var(--ds-space-2) var(--ds-space-3);
  border-radius: var(--ds-radius-pill);
  color: rgba(255, 255, 255, 0.82);
  font-size: 14px;
  font-weight: 500;
  text-decoration: none;
  transition: color var(--ds-duration-base) var(--ds-ease-standard);
}

.site-nav__signin svg {
  width: 15px;
  height: 15px;
}

.site-nav__signin:hover {
  color: var(--ds-color-text-primary);
}

.site-nav__cta {
  white-space: nowrap;
}

.site-nav__cta-label--short {
  display: none;
}

/* Hamburger */
.site-nav__toggle {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 38px;
  height: 38px;
  border-radius: var(--ds-radius-pill);
  color: var(--ds-color-text-primary);
  cursor: pointer;
  transition: background-color var(--ds-duration-base) var(--ds-ease-standard);
}

.site-nav__toggle:hover {
  background-color: var(--ds-color-bg-hover);
}

.site-nav__toggle-bars {
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 4px;
  width: 17px;
}

.site-nav__toggle-bars span {
  display: block;
  height: 1.5px;
  border-radius: var(--ds-radius-pill);
  background-color: currentColor;
  transition: transform var(--ds-duration-base) var(--ds-ease-standard),
    opacity var(--ds-duration-base) var(--ds-ease-standard);
}

/* Morph the bars into a cross while the drawer is open */
.site-nav__toggle[aria-expanded='true'] .site-nav__toggle-bars span:nth-child(1) {
  transform: translateY(5.5px) rotate(45deg);
}

.site-nav__toggle[aria-expanded='true'] .site-nav__toggle-bars span:nth-child(2) {
  opacity: 0;
}

.site-nav__toggle[aria-expanded='true'] .site-nav__toggle-bars span:nth-child(3) {
  transform: translateY(-5.5px) rotate(-45deg);
}

@media (min-width: 1008px) {
  .site-nav__links,
  .site-nav__signin {
    display: flex;
  }

  .site-nav__toggle {
    display: none;
  }
}

/* On compact screens the header is an always-readable glass bar. The shorter
   CTA, smaller wordmark and tighter rhythm prevent the three controls from
   fighting for the same horizontal space. */
@media (max-width: 1007px) {
  .site-nav__inner::before {
    opacity: 0.9;
    visibility: visible;
    transition: opacity 220ms var(--ds-ease-standard);
  }

  .site-nav.is-scrolled .site-nav__inner::before {
    opacity: 1;
  }
}

@media (max-width: 599px) {
  .site-nav {
    width: calc(100% - 24px);
    padding-top: 8px;
  }

  .site-nav__inner {
    gap: 4px;
    padding: 4px 4px 4px 8px;
  }

  .site-nav__logo {
    height: 20px;
  }

  .site-nav__actions {
    gap: 2px;
  }

  .site-nav__cta {
    min-height: 36px;
    padding: 9px 12px;
    font-size: 14px;
  }

  .site-nav__cta-label--long {
    display: none;
  }

  .site-nav__cta-label--short {
    display: inline;
  }

  .site-nav__toggle {
    width: 36px;
    height: 36px;
  }
}

/* ==========================================================================
   Mobile drawer — full-screen panel, matching the reference's mobile menu
   ========================================================================== */

.nav-drawer {
  position: fixed;
  inset: 0;
  z-index: var(--ds-z-drawer);
  display: flex;
  flex-direction: column;
  background-color: var(--ds-color-bg-page);
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--ds-duration-base) var(--ds-ease-standard);
}

.nav-drawer.is-open {
  opacity: 1;
  pointer-events: auto;
}

/* The full-screen panel is opaque, so the backdrop is only a click target */
.nav-drawer__backdrop {
  position: absolute;
  inset: 0;
}

.nav-drawer__panel {
  position: relative;
  display: flex;
  flex-direction: column;
  height: 100%;
  padding: calc(var(--ds-header-height) + var(--ds-space-5)) var(--ds-space-5)
    var(--ds-space-7);
  overflow-y: auto;
}

.nav-drawer__list {
  display: flex;
  flex-direction: column;
}

.nav-drawer__link {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--ds-space-5) 0;
  border-bottom: var(--ds-border-width) solid var(--ds-color-border-divider);
  color: var(--ds-color-text-primary);
  font-family: var(--ds-font-sans);
  font-size: 18px;
  font-weight: 500;
  text-decoration: none;
  transition: color var(--ds-duration-base) var(--ds-ease-standard);
}

.nav-drawer__link svg {
  width: 16px;
  height: 16px;
  color: var(--ds-color-text-description);
}

.nav-drawer__link:hover {
  color: var(--ds-color-brand);
}

.nav-drawer__actions {
  display: flex;
  flex-direction: column;
  gap: var(--ds-space-3);
  margin-top: var(--ds-space-7);
}

.nav-drawer__actions .btn {
  width: 100%;
}

@media (min-width: 1008px) {
  .nav-drawer {
    display: none;
  }
}