/* ==========================================================
   Site header / mega nav — from brandstory-ai-homepage.html
   Scoped under .site-header to avoid Bootstrap collisions.
========================================================== */

.site-header {
  --nav-ivory: #efecca;
  --nav-ivory-soft: #f7f5e4;
  --nav-sage: #a9cbb7;
  --nav-tangerine: #ff934f;
  --nav-taupe: #5e565a;
  --nav-taupe-deep: #3e3739;
  --nav-line: rgba(94, 86, 90, 0.14);
  --nav-max: 1440px;
  --nav-t-fast: 250ms;
  --nav-t-med: 400ms;
  --nav-ease: cubic-bezier(0.22, 0.61, 0.36, 1);
  --site-header-height: 76px;

  position: sticky;
  top: 0;
  z-index: 1030;
  background: rgba(239, 236, 202, 0.92);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--nav-line);
}

.site-header .wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  max-width: var(--nav-max);
  margin: 0 auto;
  padding: 0 32px;
  height: 76px;
}

.site-header .logo {
  display: flex;
  align-items: center;
  white-space: nowrap;
  flex-shrink: 0;
}

.site-header .logo-img {
  height: 34px;
  width: auto;
  display: block;
  max-width: none;
}

.site-header .nav-cta {
  display: flex;
  gap: 12px;
  align-items: center;
  flex-shrink: 0;
}

.site-header .nav-cta .btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 11px 22px;
  border-radius: 100px;
  font-size: 14px;
  font-weight: 500;
  line-height: 1.2;
  border: 1.5px solid transparent;
  white-space: nowrap;
  text-decoration: none;
  transition:
    transform var(--nav-t-fast) var(--nav-ease),
    background var(--nav-t-fast) var(--nav-ease),
    border-color var(--nav-t-fast) var(--nav-ease),
    color var(--nav-t-fast) var(--nav-ease);
}

.site-header .nav-cta .btn-primary {
  background: var(--nav-tangerine);
  color: #2b2224;
  border-color: transparent;
}

.site-header .nav-cta .btn-primary:hover,
.site-header .nav-cta .btn-primary:focus-visible {
  transform: translateY(-2px);
  background: #ff7f2e;
  color: #2b2224;
}

.site-header .nav-cta .btn-secondary {
  background: transparent;
  color: var(--nav-taupe-deep);
  border-color: var(--nav-taupe-deep);
}

.site-header .nav-cta .btn-secondary:hover,
.site-header .nav-cta .btn-secondary:focus-visible {
  transform: translateY(-2px);
  background: var(--nav-taupe-deep);
  color: var(--nav-ivory);
}

.site-header .nav-main {
  display: flex;
  align-items: center;
  gap: 4px;
  height: 100%;
}

.site-header .nav-item {
  position: relative;
  height: 100%;
  display: flex;
  align-items: center;
}

.site-header .nav-link {
  display: flex;
  align-items: center;
  gap: 6px;
  height: 100%;
  padding: 0 16px;
  font-size: 15px;
  font-weight: 500;
  color: var(--nav-taupe-deep);
  position: relative;
  background: none;
  border: none;
  font-family: inherit;
  cursor: pointer;
  text-decoration: none;
  transition: color var(--nav-t-fast) var(--nav-ease);
}

.site-header .nav-link .chev {
  width: 10px;
  height: 10px;
  transition: transform var(--nav-t-med) var(--nav-ease);
}

.site-header .nav-link::after {
  content: "";
  position: absolute;
  left: 16px;
  right: 16px;
  bottom: 14px;
  height: 2px;
  background: var(--nav-tangerine);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--nav-t-med) var(--nav-ease);
}

.site-header .nav-item.open > .nav-link,
.site-header .nav-link.is-active,
.site-header .nav-link:hover,
.site-header .nav-link:focus-visible {
  color: var(--nav-tangerine);
}

.site-header .nav-item.open > .nav-link::after,
.site-header .nav-link.is-active::after {
  transform: scaleX(1);
}

.site-header .nav-item.open > .nav-link .chev {
  transform: rotate(180deg);
}

.site-header .menu-toggle {
  display: none;
  width: 40px;
  height: 40px;
  border-radius: 10px;
  align-items: center;
  justify-content: center;
  background: transparent;
  border: 1px solid var(--nav-line);
  padding: 0;
}

.site-header .menu-toggle svg {
  width: 20px;
  height: 20px;
}

.site-header .mega {
  position: fixed;
  top: 76px;
  left: 0;
  right: 0;
  width: 100vw;
  display: flex;
  justify-content: center;
  pointer-events: none;
  opacity: 0;
  transform: translateY(-8px);
  transition:
    opacity var(--nav-t-med) var(--nav-ease),
    transform var(--nav-t-med) var(--nav-ease);
  z-index: 1029;
}

.site-header .nav-item.open > .mega {
  pointer-events: auto;
  opacity: 1;
  transform: translateY(0);
}

.site-header .mega-inner {
  width: 100%;
  background: var(--nav-ivory-soft);
  border-top: 1px solid var(--nav-line);
  border-bottom: 1px solid var(--nav-line);
  box-shadow: 0 24px 48px -16px rgba(62, 55, 57, 0.18);
  padding: 36px 0;
}

.site-header .mega-content {
  max-width: var(--nav-max);
  margin: 0 auto;
  padding: 0 32px;
}

.site-header .mega-grid {
  display: grid;
  gap: 8px;
  grid-template-columns: repeat(auto-fit, minmax(230px, 1fr));
}

.site-header .mm-item {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  padding: 16px;
  border-radius: 10px;
  min-height: 88px;
  text-decoration: none;
  color: inherit;
  transition:
    background var(--nav-t-fast) var(--nav-ease),
    transform var(--nav-t-fast) var(--nav-ease);
}

.site-header .mm-item:hover,
.site-header .mm-item:focus-visible {
  background: #fff;
  transform: translateX(2px);
  color: inherit;
}

.site-header .mm-item .icon-badge {
  width: 44px;
  height: 44px;
  border-radius: 12px;
  background: #fff;
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
}

.site-header .mm-item:hover .icon-badge,
.site-header .mm-item:focus-visible .icon-badge {
  background: var(--nav-sage);
}

.site-header .mm-item .icon-badge svg {
  width: 20px;
  height: 20px;
  stroke: var(--nav-taupe-deep);
}

.site-header .mm-text strong {
  font-size: 15px;
  font-weight: 500;
  display: block;
  margin-bottom: 3px;
  color: var(--nav-taupe-deep);
}

.site-header .mm-text p {
  margin: 0;
  font-size: 12.5px;
  color: var(--nav-taupe);
  line-height: 1.4;
}

.site-header .mega-side-label {
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--nav-taupe);
  margin-bottom: 18px;
}

@media (max-width: 900px) {
  .site-header .wrap {
    padding: 0 20px;
  }

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

  .site-header .nav-cta .btn-secondary {
    display: none;
  }

  .site-header .menu-toggle {
    display: flex;
  }

  .site-header .mega {
    position: static;
    opacity: 1;
    transform: none;
    pointer-events: auto;
    display: none;
    width: 100%;
  }

  .site-header .nav-item.open > .mega {
    display: flex;
  }

  .site-header .mega-inner {
    margin: 0;
    border-radius: 0;
    box-shadow: none;
    border: none;
    border-top: 1px solid var(--nav-line);
    padding: 12px 0 20px;
  }

  .site-header .mega-content {
    padding: 0;
  }

  .site-header .mega-grid {
    grid-template-columns: 1fr;
  }

  body.nav-open .site-header .nav-main {
    display: flex;
    flex-direction: column;
    align-items: stretch;
    position: fixed;
    top: 76px;
    right: 0;
    bottom: 0;
    left: 0;
    height: fit-content;
    max-height: calc(100vh - 76px);
    max-height: calc(100dvh - 76px);
    background: var(--nav-ivory);
    overflow-x: hidden;
    overflow-y: auto;
    -webkit-overflow-scrolling: touch;
    overscroll-behavior: contain;
    padding: 8px 20px 40px;
    gap: 0;
    z-index: 1028;
  }

  body.nav-open .site-header .nav-item {
    height: auto;
    flex-direction: column;
    align-items: stretch;
    flex-shrink: 0;
    border-bottom: 1px solid var(--nav-line);
  }

  body.nav-open .site-header .nav-link {
    height: 56px;
    flex-shrink: 0;
    justify-content: space-between;
  }

  body.nav-open .site-header .nav-link::after {
    display: none;
  }

  body.nav-open .site-header .mega,
  body.nav-open .site-header .mega-inner,
  body.nav-open .site-header .mega-content {
    flex-shrink: 0;
  }
}

body.nav-open {
  overflow: hidden;
}

@media (prefers-reduced-motion: reduce) {
  .site-header .nav-link,
  .site-header .nav-link::after,
  .site-header .nav-link .chev,
  .site-header .mega,
  .site-header .mm-item,
  .site-header .nav-cta .btn {
    transition: none;
  }
}