/* ==========================================================================
   Site header, mobile drawer, brochure rail, footer
   ========================================================================== */

/* ---- Header -------------------------------------------------------------- */

.site-header {
  position: fixed;
  inset: 0 0 auto 0;
  z-index: 90;
  background: transparent;
  transition:
    transform var(--dur) var(--ease),
    background-color var(--dur) var(--ease),
    border-color var(--dur) var(--ease);
  border-bottom: 1px solid transparent;
}

/* Solid state: scrolled past the hero, or any page with a light top. */
.site-header.is-solid,
.site-header[data-theme="light"] {
  background: rgba(255, 255, 255, .85);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom-color: rgba(0, 0, 0, .05);
}

.site-header.is-hidden { transform: translateY(-100%); }

.site-header__inner {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  max-width: var(--container-wide);
  margin-inline: auto;
  padding: .75rem var(--gutter);
}

.site-header__logo { flex-shrink: 0; position: relative; z-index: 2; }

.site-header__logo img {
  width: auto;
  height: 3.25rem;
  transition: height var(--dur-slow) var(--ease);
}

@media (min-width: 768px) {
  .site-header__logo img { height: 5.5rem; }
  .site-header.is-solid .site-header__logo img { height: 4rem; }
}

/* Two logo variants swap with the header theme. */
.site-header__logo .logo--light { display: block; }
.site-header__logo .logo--dark  { display: none; }

.site-header.is-solid .logo--light,
.site-header[data-theme="light"] .logo--light { display: none; }

.site-header.is-solid .logo--dark,
.site-header[data-theme="light"] .logo--dark { display: block; }

/* Centre navigation */
.site-nav {
  display: none;
  align-items: center;
  gap: 2rem;
  position: absolute;
  left: 50%;
  transform: translateX(-50%);
}

@media (min-width: 1024px) { .site-nav { gap: 2.5rem; } }

@media (min-width: 768px) { .site-nav { display: flex; } }

.site-nav__link {
  position: relative;
  font-size: .9375rem;
  letter-spacing: -.005em;
  color: rgba(255, 255, 255, .85);
  transition: color var(--dur-fast) var(--ease);
}

.site-nav__link:hover { color: #fff; }

.site-header.is-solid .site-nav__link,
.site-header[data-theme="light"] .site-nav__link {
  color: rgba(20, 20, 20, .75);
}

.site-header.is-solid .site-nav__link:hover,
.site-header[data-theme="light"] .site-nav__link:hover {
  color: var(--c-fg);
}

.site-nav__link::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -.25rem;
  width: 100%;
  height: 1.5px;
  background: currentColor;
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--dur) var(--ease);
}

.site-nav__link:hover::after { transform: scaleX(1); }

/* Models dropdown */
.site-nav__group { position: relative; }

.site-nav__panel {
  position: absolute;
  top: calc(100% + 1.25rem);
  left: 50%;
  transform: translate(-50%, -.5rem);
  min-width: 13rem;
  padding: .5rem;
  border-radius: var(--radius);
  background: #fff;
  box-shadow: var(--shadow);
  opacity: 0;
  visibility: hidden;
  transition:
    opacity var(--dur-fast) var(--ease),
    transform var(--dur-fast) var(--ease),
    visibility var(--dur-fast);
}

.site-nav__group:hover .site-nav__panel,
.site-nav__group:focus-within .site-nav__panel {
  opacity: 1;
  visibility: visible;
  transform: translate(-50%, 0);
}

.site-nav__panel a {
  display: block;
  padding: .7rem .9rem;
  border-radius: var(--radius-sm);
  font-size: .9375rem;
  color: var(--c-fg);
  transition: background-color var(--dur-fast) var(--ease);
}

.site-nav__panel a:hover { background: var(--c-light); }

.site-nav__panel small {
  display: block;
  font-size: .6875rem;
  color: var(--c-muted);
  margin-top: .1rem;
}

/* Header actions */
.site-header__actions {
  display: none;
  align-items: center;
  gap: .25rem;
}

/* A white pill disappears once the header goes solid — flip it to dark. */
.site-header.is-solid .btn--light,
.site-header[data-theme="light"] .btn--light {
  --btn-bg: var(--c-fg);
  --btn-fg: #fff;
}

@media (min-width: 768px) { .site-header__actions { display: flex; } }

.site-header__mobile {
  display: flex;
  align-items: center;
  gap: .25rem;
  position: relative;
  z-index: 2;
}

@media (min-width: 768px) { .site-header__mobile { display: none; } }

.burger {
  display: grid;
  place-items: center;
  padding: .5rem;
  color: #fff;
}

.site-header.is-solid .burger,
.site-header[data-theme="light"] .burger { color: var(--c-fg); }

.burger svg { width: 1.25rem; height: 1.25rem; }

/* ---- Mobile drawer ------------------------------------------------------- */

.drawer {
  position: fixed;
  inset: 0;
  z-index: 95;
  display: flex;
  flex-direction: column;
  padding: 6rem var(--gutter) 2.5rem;
  background: var(--c-bg);
  transform: translateY(-100%);
  visibility: hidden;
  transition: transform var(--dur) var(--ease), visibility var(--dur);
}

.drawer[data-open="true"] { transform: none; visibility: visible; }

@media (min-width: 768px) { .drawer { display: none; } }

.drawer__close {
  position: absolute;
  top: 1.5rem;
  right: var(--gutter);
  padding: .5rem;
}

.drawer__close svg { width: 1.5rem; height: 1.5rem; }

.drawer__nav { display: grid; gap: .25rem; }

.drawer__link {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-block: 1rem;
  border-bottom: 1px solid var(--c-border-soft);
  font-size: 1.75rem;
  font-weight: var(--fw-light);
  letter-spacing: -.02em;
}

.drawer__link small {
  font-size: .6875rem;
  text-transform: uppercase;
  letter-spacing: .16em;
  color: var(--c-muted);
}

.drawer__foot { margin-top: auto; padding-top: 2rem; display: grid; gap: 1rem; }

.drawer__meta {
  font-size: .8125rem;
  color: var(--c-muted);
}

/* ---- Brochure rail ------------------------------------------------------- */

.brochure-rail {
  position: fixed;
  left: 0;
  top: 50%;
  transform: translateY(-50%);
  z-index: 80;
  display: none;
  flex-direction: column;
  align-items: center;
  background: var(--c-fg);
  color: #fff;
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  overflow: hidden;
}

@media (min-width: 1024px) { .brochure-rail { display: flex; } }

.brochure-rail[hidden] { display: none; }

.brochure-rail__btn {
  display: flex;
  align-items: center;
  gap: .75rem;
  padding: 1.5rem .5rem;
  writing-mode: vertical-rl;
  transform: rotate(180deg);
  font-size: .625rem;
  text-transform: uppercase;
  letter-spacing: .22em;
  color: #fff;
  transition: background-color var(--dur-fast) var(--ease);
}

.brochure-rail__btn:hover { background: rgba(255, 255, 255, .1); }

.brochure-rail__btn svg { width: .85rem; height: .85rem; }

.brochure-rail__close {
  display: grid;
  place-items: center;
  width: 100%;
  padding: .55rem 0;
  border-top: 1px solid rgba(255, 255, 255, .15);
  color: rgba(255, 255, 255, .7);
}

.brochure-rail__close svg { width: .75rem; height: .75rem; }

/* ---- Footer -------------------------------------------------------------- */

.site-footer {
  background: var(--c-footer);
  color: #fff;
  border-top: 1px solid rgba(255, 255, 255, .1);
}

.site-footer__inner {
  max-width: var(--container-wide);
  margin-inline: auto;
  padding: 4rem var(--gutter);
}

.site-footer__grid {
  display: grid;
  gap: 3rem;
  margin-bottom: 4rem;
}

@media (min-width: 768px) {
  .site-footer__grid { grid-template-columns: repeat(4, minmax(0, 1fr)); }
}

.site-footer__logo {
  height: 5rem;
  width: auto;
  object-fit: contain;
  margin: -1rem 0 1.5rem;
}

@media (min-width: 768px) {
  .site-footer__logo { height: 6rem; margin-top: -1.5rem; }
}

.site-footer__heading {
  font-size: .6875rem;
  font-weight: var(--fw-regular);
  text-transform: uppercase;
  letter-spacing: .18em;
  color: rgba(255, 255, 255, .4);
  margin-bottom: 1.25rem;
}

.site-footer__list { display: grid; gap: .875rem; }

.site-footer__list a,
.site-footer__list li {
  display: inline-flex;
  align-items: center;
  gap: .5rem;
  font-size: 1.0625rem;
  font-weight: var(--fw-regular);
  color: rgba(255, 255, 255, .78);
  transition: color var(--dur-fast) var(--ease);
}

.site-footer__list a:hover { color: #fff; }

.site-footer__list svg { width: .9rem; height: .9rem; }

.site-footer__bar {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  padding-top: 2rem;
  border-top: 1px solid rgba(255, 255, 255, .1);
  font-size: .75rem;
  color: rgba(255, 255, 255, .5);
}

@media (min-width: 768px) {
  .site-footer__bar {
    flex-direction: row;
    align-items: center;
    justify-content: space-between;
  }
}