/* ==========================================================================
   Canonical site navigation — header + responsive menu panel.
   Single source of truth for every public page. Loaded after each page's
   own stylesheet. Uses its own custom properties so it never depends on a
   host page's --ink/--paper/--cream names.
   ========================================================================== */

:root {
  --nav-paper: #f3f0e9;
  --nav-ink: #0b0b0a;
  --nav-line: rgba(11, 11, 10, .16);
  --nav-muted: rgba(11, 11, 10, .6);
  --nav-sans: "Century Gothic", CenturyGothic, Arial, sans-serif;
  --nav-serif: "New Baskerville", "Baskerville Old Face", Baskerville, Georgia, serif;
  --nav-height: 80px;
}

[data-nav-theme="dark"] {
  --nav-paper: #080807;
  --nav-ink: #eee7dc;
  --nav-line: rgba(238, 231, 220, .18);
  --nav-muted: rgba(238, 231, 220, .6);
}

.site-header,
.site-menu,
.site-header * ,
.site-menu * {
  box-sizing: border-box;
}

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

.site-header {
  position: sticky;
  top: 0;
  z-index: 80;
  height: var(--nav-height);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 0 4vw;
  background: var(--nav-paper);
  color: var(--nav-ink);
  border-bottom: 1px solid var(--nav-line);
}

.site-header__brand {
  display: flex;
  flex-shrink: 0;
  align-items: center;
  width: clamp(170px, 14vw, 230px);
  text-decoration: none;
}

.site-header__brand img {
  display: block;
  width: 100%;
  height: auto;
}

.site-header__nav {
  display: flex;
  align-items: center;
  gap: clamp(24px, 3vw, 48px);
  font: 400 11px/1 var(--nav-mono, var(--nav-sans));
  letter-spacing: .08em;
  text-transform: uppercase;
}

.site-header__nav a {
  color: var(--nav-ink);
  text-decoration: none;
  white-space: nowrap;
  padding-bottom: 3px;
  border-bottom: 1px solid transparent;
  transition: border-color .2s ease, opacity .2s ease;
}

.site-header__nav a:hover {
  border-bottom-color: var(--nav-line);
}

.site-header__nav a[aria-current="page"] {
  border-bottom-color: currentColor;
}

/* ---------- Toggle (responsive only) ---------- */

.site-header__toggle {
  display: none;
  align-items: center;
  justify-content: center;
  gap: 8px;
  flex-shrink: 0;
  min-width: 44px;
  min-height: 44px;
  padding: 0 4px;
  margin: 0;
  border: 0;
  background: none;
  color: var(--nav-ink);
  cursor: pointer;
  font: 400 10px/1 var(--nav-sans);
  letter-spacing: .1em;
  text-transform: uppercase;
}

.site-header__toggle-text {
  display: block;
}

.site-header__chevron {
  display: block;
  overflow: visible;
  flex-shrink: 0;
}

.site-header__chevron path {
  fill: none;
  stroke: currentColor;
  stroke-width: 2;
  transform-box: fill-box;
  transform-origin: center;
  transition: transform .3s cubic-bezier(.16, 1, .3, 1);
}

.site-header__toggle[aria-expanded="true"] .site-header__chevron path {
  transform: rotate(180deg);
}

/* ---------- Responsive menu panel ---------- */

.site-menu {
  position: fixed;
  z-index: 79;
  top: var(--nav-height);
  display: flex;
  flex-direction: column;
  background: var(--nav-paper);
  color: var(--nav-ink);
  border: 1px solid var(--nav-line);
  border-radius: 8px;
  box-shadow: 0 12px 30px rgba(11, 11, 10, .12);
  opacity: 0;
  transform: translateY(-6px);
  pointer-events: none;
  transition: opacity .16s ease, transform .16s ease;
}

.site-menu[aria-hidden="false"] {
  opacity: 1;
  transform: none;
  pointer-events: auto;
}

.site-menu a {
  display: flex;
  align-items: center;
  min-height: 52px;
  padding: 0 20px;
  color: var(--nav-ink);
  text-decoration: none;
  font: 400 11px/1 var(--nav-sans);
  letter-spacing: .08em;
  text-transform: uppercase;
  border-bottom: 1px solid var(--nav-line);
}

.site-menu a[aria-current="page"] {
  color: var(--nav-muted);
}

.site-menu__enquiry {
  border-top: 1px solid var(--nav-line);
  margin-top: 2px;
}

/* Phone: inset 12px, full width */
@media (max-width: 600px) {
  .site-menu {
    left: 12px;
    right: 12px;
  }
}

/* Tablet: anchored right, capped width */
@media (min-width: 601px) and (max-width: 900px) {
  .site-menu {
    left: auto;
    right: 4vw;
    width: min(360px, calc(100vw - 48px));
  }
}

/* ---------- Breakpoint: single switch at 900px ---------- */

@media (max-width: 900px) {
  .site-header__nav {
    display: none;
  }

  .site-header__toggle {
    display: flex;
  }
}

@media (min-width: 901px) {
  .site-menu {
    display: none;
  }
}

/* ---------- Focus ---------- */

.site-header__brand:focus-visible,
.site-header__nav a:focus-visible,
.site-header__toggle:focus-visible,
.site-menu a:focus-visible {
  outline: 2px solid currentColor;
  outline-offset: 3px;
}

/* ---------- Reduced motion ---------- */

@media (prefers-reduced-motion: reduce) {
  .site-menu,
  .site-header__chevron path {
    transition: none !important;
  }
}