/* =========================================================
   CGW Studios : Site Header & Full-Screen Menu
   Pattern: transparent over hero → solid on scroll → full overlay on menu open
   Loaded after tokens.css and base.css.
   ========================================================= */

/* ---------- Header shell ---------- */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: var(--z-header);
  background: transparent;
  transition:
    background-color 320ms var(--ease-out),
    box-shadow 320ms var(--ease-out),
    border-color 320ms var(--ease-out),
    backdrop-filter 320ms var(--ease-out);
  border-bottom: 1px solid transparent;
  pointer-events: none;
}
.site-header > * { pointer-events: auto; }

/* Solid state (after scroll) */
.site-header.is-scrolled {
  background: rgba(251, 249, 246, 0.92);
  backdrop-filter: saturate(1.4) blur(14px);
  -webkit-backdrop-filter: saturate(1.4) blur(14px);
  border-bottom-color: var(--color-border);
}

/* Open menu state : header sits ABOVE the overlay, solid */
.site-header.is-menu-open {
  background: var(--color-bg);
  border-bottom-color: var(--color-border);
}

/* ---------- Header bar grid ---------- */
.site-header__bar {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  gap: var(--space-4);
  min-height: 84px;
  padding-inline: clamp(1rem, 0.5rem + 2vw, 2rem);
  transition: min-height 320ms var(--ease-out);
}
.site-header.is-scrolled .site-header__bar { min-height: 70px; }

.site-header__left  { justify-self: start;  display: flex; align-items: center; gap: var(--space-3); }
.site-header__center{ justify-self: center; display: flex; align-items: center; }
.site-header__right { justify-self: end;    display: flex; align-items: center; gap: var(--space-3); }

/* ---------- Brand (center) ---------- */
.brand {
  display: inline-flex;
  align-items: center;
  gap: var(--space-3);
  font-family: var(--font-display);
  font-size: 1.5rem;
  font-weight: 600;
  color: var(--color-green);
  letter-spacing: 0.02em;
  line-height: 1;
  white-space: nowrap;
  transition: color 320ms var(--ease-out), font-size 320ms var(--ease-out);
}
.brand__mark {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 38px; height: 38px;
  border-radius: 50%;
  background: var(--color-green);
  color: var(--color-text-on-dark);
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 0.9375rem;
  letter-spacing: 0;
  transition: background-color 320ms var(--ease-out), color 320ms var(--ease-out), width 320ms var(--ease-out), height 320ms var(--ease-out);
  /* TODO: replace with real CGW logo SVG; wordmark "Studios" stays beside it */
}
.brand__name {
  line-height: 1;
}

/* On scroll: brand shrinks slightly */
.site-header.is-scrolled .brand { font-size: 1.25rem; }
.site-header.is-scrolled .brand__mark { width: 34px; height: 34px; font-size: 0.875rem; }

/* ---------- Header buttons ---------- */
.hdr-btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-3);
  height: 44px;
  padding-inline: var(--space-3);
  font-family: var(--font-sans);
  font-size: var(--fs-xs);
  font-weight: 600;
  letter-spacing: var(--tracking-wider);
  text-transform: uppercase;
  color: var(--color-charcoal);
  background: transparent;
  border-radius: var(--radius-pill);
  cursor: pointer;
  transition: background-color var(--dur-base) var(--ease-out), color var(--dur-base) var(--ease-out);
}
.hdr-btn:hover { background: rgba(43, 43, 43, 0.06); }

.hdr-btn--icon {
  width: 44px;
  padding: 0;
  justify-content: center;
}
.hdr-btn--icon svg { width: 20px; height: 20px; }

/* Hamburger icon */
.menu-toggle__icon {
  position: relative;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 22px;
  height: 22px;
  flex-shrink: 0;
}
.menu-toggle__icon span {
  position: absolute;
  left: 1px;
  right: 1px;
  height: 1.5px;
  background: currentColor;
  border-radius: 1px;
  transform-origin: center;
  transition: transform var(--dur-base) var(--ease-out), top var(--dur-base) var(--ease-out), opacity var(--dur-fast) var(--ease-out);
}
.menu-toggle__icon span:nth-child(1) { top: 7px; }
.menu-toggle__icon span:nth-child(2) { top: 13px; }

/* X state when menu open */
.site-header.is-menu-open .menu-toggle__icon span:nth-child(1) {
  top: 10px;
  transform: rotate(45deg);
}
.site-header.is-menu-open .menu-toggle__icon span:nth-child(2) {
  top: 10px;
  transform: rotate(-45deg);
}

.menu-toggle__label {
  display: inline-block;
}

/* ---------- BOOK A TOUR : header CTA variants ---------- */
.btn--book {
  height: 44px;
  min-height: 44px;
  padding: 0 var(--space-6);
  font-size: var(--fs-xs);
  font-weight: 600;
  letter-spacing: var(--tracking-wider);
  text-transform: uppercase;
  border-radius: var(--radius-pill);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  transition: background-color var(--dur-base) var(--ease-out), color var(--dur-base) var(--ease-out), border-color var(--dur-base) var(--ease-out), transform var(--dur-base) var(--ease-out);
  white-space: nowrap;
}
/* Initial state: outlined button on transparent header */
.btn--book {
  background: transparent;
  color: var(--color-charcoal);
  box-shadow: inset 0 0 0 1.5px var(--color-charcoal);
}
.btn--book:hover {
  background: var(--color-charcoal);
  color: var(--color-text-on-dark);
  transform: translateY(-1px);
}
/* Solid state: filled green */
.site-header.is-scrolled .btn--book,
.site-header.is-menu-open .btn--book {
  background: var(--color-green);
  color: var(--color-text-on-dark);
  box-shadow: none;
}
.site-header.is-scrolled .btn--book:hover,
.site-header.is-menu-open .btn--book:hover {
  background: #25382F;
}

/* ---------- Mobile responsive header ---------- */
@media (max-width: 720px) {
  .site-header__bar {
    grid-template-columns: auto 1fr auto;
    min-height: 68px;
  }
  .site-header.is-scrolled .site-header__bar { min-height: 60px; }
  .menu-toggle__label { display: none; }
  .hdr-btn--icon.hdr-btn--phone { display: none; } /* hide phone icon on mobile (use sticky CTA) */
  .brand { font-size: 1.25rem; gap: var(--space-2); }
  .brand__mark { width: 32px; height: 32px; font-size: 0.8125rem; }
  .btn--book { padding: 0 var(--space-4); font-size: 0.6875rem; height: 38px; }
}

/* Very narrow screens */
@media (max-width: 380px) {
  .brand { font-size: 1.0625rem; }
  .brand__mark { width: 28px; height: 28px; font-size: 0.6875rem; }
  .btn--book { padding: 0 var(--space-3); font-size: 0.625rem; height: 36px; }
  .menu-toggle.hdr-btn { padding-inline: var(--space-2); }
}

/* ---------- Full-screen menu overlay ---------- */
.menu-overlay {
  position: fixed;
  inset: 0;
  z-index: calc(var(--z-header) - 1);
  background: var(--color-bg);
  padding-top: 84px; /* clears the header bar */
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  transition: opacity 320ms var(--ease-out), visibility 0ms 320ms;
  overflow-y: auto;
  overscroll-behavior: contain;
}
.menu-overlay.is-open {
  opacity: 1;
  visibility: visible;
  pointer-events: auto;
  transition: opacity 320ms var(--ease-out), visibility 0ms 0ms;
}
@media (max-width: 720px) {
  .menu-overlay { padding-top: 68px; }
}

.menu-overlay__inner {
  display: grid;
  gap: clamp(2rem, 1rem + 4vw, 4rem);
  padding-block: clamp(2.5rem, 1rem + 5vw, 5rem) clamp(2rem, 1rem + 3vw, 3.5rem);
}

@media (min-width: 960px) {
  .menu-overlay__inner {
    grid-template-columns: 1fr 1.4fr 1fr;
    grid-template-areas:
      "featured nav card";
    align-items: start;
  }
  .menu-overlay__featured { grid-area: featured; }
  .menu-overlay__nav      { grid-area: nav; }
  .menu-overlay__card     { grid-area: card; }
}

/* Featured area (left column) */
.menu-overlay__featured {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
}
.menu-overlay__featured-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: var(--space-3);
  font-family: var(--font-sans);
  font-size: var(--fs-xs);
  font-weight: 500;
  letter-spacing: var(--tracking-wider);
  text-transform: uppercase;
  color: var(--color-bronze);
}
.menu-overlay__featured-eyebrow::before {
  content: "";
  width: 10px; height: 10px;
  background: var(--color-bronze);
  transform: rotate(45deg);
  flex-shrink: 0;
}
.menu-overlay__featured-title {
  font-family: var(--font-display);
  font-size: var(--fs-xl);
  font-weight: 600;
  line-height: 1.15;
  color: var(--color-green);
  margin: 0;
}
.menu-overlay__featured p {
  font-size: var(--fs-sm);
  color: var(--color-text-muted);
  line-height: var(--lh-normal);
  margin: 0;
  max-width: 32ch;
}
.menu-overlay__featured-list {
  list-style: none;
  padding: 0;
  margin: var(--space-3) 0 0;
  display: grid;
  gap: var(--space-2);
}
.menu-overlay__featured-list a {
  display: inline-flex;
  align-items: center;
  gap: var(--space-3);
  font-family: var(--font-sans);
  font-size: var(--fs-sm);
  font-weight: 500;
  color: var(--color-charcoal);
  transition: color var(--dur-base) var(--ease-out), gap var(--dur-base) var(--ease-out);
}
.menu-overlay__featured-list a::after {
  content: "→";
  font-family: var(--font-sans);
  font-size: var(--fs-sm);
  color: var(--color-bronze);
  transition: transform var(--dur-base) var(--ease-out);
}
.menu-overlay__featured-list a:hover {
  color: var(--color-green);
  gap: var(--space-4);
}

/* Primary nav (middle area) */
.menu-overlay__nav {
  display: grid;
  gap: var(--space-7);
}
@media (min-width: 600px) {
  .menu-overlay__nav { grid-template-columns: 1fr 1fr; }
}
.menu-overlay__nav ul {
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  gap: var(--space-3);
}
.menu-overlay__nav a {
  font-family: var(--font-display);
  font-size: var(--fs-lg);
  font-weight: 500;
  line-height: 1.2;
  color: var(--color-charcoal);
  display: inline-block;
  position: relative;
  transition: color var(--dur-base) var(--ease-out), transform var(--dur-base) var(--ease-out);
}
.menu-overlay__nav a::before {
  content: "";
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 1.5px;
  background: var(--color-green);
  transition: width var(--dur-base) var(--ease-out);
}
.menu-overlay__nav a:hover {
  color: var(--color-green);
  transform: translateX(4px);
}
.menu-overlay__nav a:hover::before { width: 100%; }

/* Image CTA card (right column) */
.menu-overlay__card {
  position: relative;
  border-radius: var(--radius-lg);
  overflow: hidden;
  aspect-ratio: 4 / 5;
  min-height: 320px;
  box-shadow: var(--shadow-md);
  isolation: isolate;
}
.menu-overlay__card picture { display: contents; }
.menu-overlay__card img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 600ms var(--ease-out);
}
.menu-overlay__card:hover img { transform: scale(1.04); }
.menu-overlay__card::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, transparent 35%, rgba(43, 43, 43, 0.75) 100%);
  z-index: 1;
}
.menu-overlay__card-content {
  position: absolute;
  left: var(--space-6);
  right: var(--space-6);
  bottom: var(--space-6);
  z-index: 2;
  color: var(--color-text-on-dark);
}
.menu-overlay__card-content .eyebrow {
  color: var(--color-stone);
  margin-bottom: var(--space-2);
}
.menu-overlay__card-title {
  font-family: var(--font-display);
  font-size: var(--fs-xl);
  font-weight: 600;
  color: var(--color-text-on-dark);
  margin: 0 0 var(--space-3);
  line-height: 1.15;
}
.menu-overlay__card-content p {
  font-size: var(--fs-sm);
  color: var(--color-text-on-dark-muted);
  margin: 0 0 var(--space-4);
  max-width: 28ch;
}
.menu-overlay__card-content .menu-overlay__card-cta {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-family: var(--font-sans);
  font-size: var(--fs-xs);
  font-weight: 600;
  letter-spacing: var(--tracking-wider);
  text-transform: uppercase;
  color: var(--color-text-on-dark);
  padding: var(--space-3) var(--space-5);
  border: 1.5px solid var(--color-text-on-dark);
  border-radius: var(--radius-pill);
  transition: background-color var(--dur-base) var(--ease-out), color var(--dur-base) var(--ease-out);
}
.menu-overlay__card-content .menu-overlay__card-cta:hover {
  background: var(--color-text-on-dark);
  color: var(--color-charcoal);
}

/* Bottom secondary nav strip */
.menu-overlay__bottom {
  border-top: 1px solid var(--color-border);
  padding-block: var(--space-6);
  margin-top: clamp(2rem, 1rem + 3vw, 3rem);
}
.menu-overlay__bottom ul {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-5) var(--space-7);
  justify-content: center;
}
.menu-overlay__bottom a {
  font-family: var(--font-sans);
  font-size: var(--fs-xs);
  font-weight: 500;
  letter-spacing: var(--tracking-wide);
  text-transform: uppercase;
  color: var(--color-text-muted);
  transition: color var(--dur-base) var(--ease-out);
}
.menu-overlay__bottom a:hover { color: var(--color-green); }

/* Body lock when menu is open */
body.is-menu-open {
  overflow: hidden;
}