/* ==========================================================================
   QASTCO Header — Sticky Nav + Mega Menu
   ========================================================================== */

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

.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: var(--z-header);
  background: transparent;
  transition: background var(--duration-normal) var(--ease-default),
              box-shadow var(--duration-normal) var(--ease-default),
              backdrop-filter var(--duration-normal) var(--ease-default);
}

.site-header--scrolled {
  background: rgba(17, 24, 39, 0.5);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  box-shadow: 0 1px 0 rgba(255, 255, 255, 0.05);
}

.site-header__inner {
  display: flex;
  align-items: center;
  height: 72px;
  transition: height var(--duration-normal) var(--ease-default);
}

.site-header--scrolled .site-header__inner {
  height: 60px;
}

/* --- Logo --- */

.site-header__logo {
  margin-right: auto;
  display: flex;
  align-items: center;
  text-decoration: none;
}

.site-header__logo-text {
  font-size: 22px;
  font-weight: var(--font-weight-black);
  color: var(--color-primary);
  letter-spacing: -0.02em;
}

.site-header__logo-img {
  height: 48px;
  width: auto;
}

.site-header--scrolled .site-header__logo-img {
  height: 38px;
}

/* --- Desktop Nav --- */

.site-nav {
  display: none;
  align-items: center;
  gap: 0;
  height: 100%;
}

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

.site-nav__item {
  position: relative;
  display: flex;
  align-items: center;
  height: 100%;
  padding: 0 var(--space-4);
  font-size: var(--text-sm);
  font-weight: var(--font-weight-semibold);
  color: #CBD5E1;
  cursor: pointer;
  transition: color var(--duration-fast) var(--ease-default);
  text-decoration: none;
  border: none;
  background: none;
}

.site-nav__item:hover,
.site-nav__item[aria-expanded="true"],
.site-nav__item--active {
  color: var(--color-white);
}

.site-nav__item[aria-expanded="true"]::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: var(--space-4);
  right: var(--space-4);
  height: 3px;
  background: var(--color-primary);
  border-radius: 3px 3px 0 0;
}

.site-nav__arrow {
  font-size: 10px;
  margin-left: var(--space-1);
  opacity: 0.6;
  transition: transform var(--duration-fast) var(--ease-default);
}

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

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

.site-header__cta {
  display: none;
  margin-left: var(--space-4);
}

@media (min-width: 1024px) {
  .site-header__cta {
    display: block;
  }
}

.site-header__cta .btn {
  padding: var(--space-2) var(--space-5);
  font-size: var(--text-sm);
  white-space: nowrap;
}

/* --- Mobile Toggle --- */

.site-header__toggle {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 0;
}

@media (min-width: 1024px) {
  .site-header__toggle {
    display: none;
  }
}

.site-header__toggle-icon {
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 24px;
  height: 24px;
}

.site-header__toggle-icon span {
  display: block;
  height: 2px;
  background: var(--color-white);
  border-radius: 2px;
  transition: transform var(--duration-normal) var(--ease-default),
              opacity var(--duration-fast) var(--ease-default);
}

.site-header__toggle[aria-expanded="true"] .site-header__toggle-icon span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.site-header__toggle[aria-expanded="true"] .site-header__toggle-icon span:nth-child(2) {
  opacity: 0;
}

.site-header__toggle[aria-expanded="true"] .site-header__toggle-icon span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* ==========================================================================
   Mega Menu Dropdown
   ========================================================================== */

.mega-menu {
  position: absolute;
  top: 100%;
  left: 0;
  right: 0;
  background: var(--color-white);
  border-top: 1px solid var(--color-line);
  box-shadow: var(--shadow-lg);
  opacity: 0;
  visibility: hidden;
  transform: translateY(-8px);
  transition: opacity var(--duration-normal) var(--ease-default),
              transform var(--duration-normal) var(--ease-default),
              visibility var(--duration-normal) var(--ease-default);
}

.mega-menu--open {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.mega-menu__inner {
  max-width: 1280px;
  margin: 0 auto;
  padding: var(--space-8) var(--space-8);
}

/* --- Featured Strip (Build → Rank → Grow) --- */

.mega-menu__featured {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-3);
  padding-bottom: var(--space-5);
  margin-bottom: var(--space-5);
  border-bottom: 1px solid var(--color-line);
}

.featured-card {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-3) var(--space-4);
  border-radius: var(--radius-md);
  border: 1px solid var(--color-line);
  background: linear-gradient(135deg, var(--color-soft) 0%, var(--color-white) 100%);
  text-decoration: none;
  transition: border-color var(--duration-fast) var(--ease-default),
              box-shadow var(--duration-fast) var(--ease-default);
}

.featured-card:hover {
  border-color: var(--color-primary);
  box-shadow: 0 4px 16px rgba(237, 28, 36, 0.08);
}

.featured-card__icon {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 22px;
  flex-shrink: 0;
}

.featured-card__title {
  font-size: var(--text-sm);
  font-weight: var(--font-weight-bold);
  color: var(--color-ink);
  display: block;
}

.featured-card__desc {
  font-size: var(--text-xs);
  color: var(--color-muted);
  line-height: 1.4;
}

.featured-card__badge {
  display: inline-block;
  font-size: 9px;
  font-weight: var(--font-weight-black);
  letter-spacing: 0.06em;
  text-transform: uppercase;
  padding: 3px 7px;
  border-radius: 4px;
  margin-top: var(--space-1);
}

.featured-card__badge--step1 { background: #FEF2F2; color: var(--color-primary); }
.featured-card__badge--step2 { background: #EEF2FF; color: #4F46E5; }
.featured-card__badge--step3 { background: #F0FDF4; color: #166534; }

/* --- Mega Menu Grid --- */

.mega-menu__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-6);
}

.mega-menu__col-title {
  font-size: var(--text-xs);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--color-muted);
  font-weight: var(--font-weight-bold);
  margin-bottom: var(--space-4);
}

/* --- Mega Menu Items --- */

.mega-menu__link {
  display: flex;
  align-items: flex-start;
  gap: var(--space-3);
  padding: var(--space-3);
  border-radius: var(--radius-sm);
  text-decoration: none;
  transition: background var(--duration-fast) var(--ease-default);
  margin-bottom: var(--space-1);
}

.mega-menu__link:hover {
  background: var(--color-soft);
}

.mega-menu__link-icon {
  width: 40px;
  height: 40px;
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
  flex-shrink: 0;
}

.mega-menu__link-icon--dm { background: #EEF2FF; color: #4F46E5; }
.mega-menu__link-icon--dev { background: #F0FDF4; color: #16A34A; }
.mega-menu__link-icon--sol { background: #FFF7ED; color: #EA580C; }
.mega-menu__link-icon--platform { background: #FEF2F2; color: var(--color-primary); }

.mega-menu__link-title {
  font-size: var(--text-sm);
  font-weight: var(--font-weight-bold);
  color: var(--color-ink);
  display: block;
}

.mega-menu__link-desc {
  font-size: var(--text-xs);
  color: var(--color-muted);
  line-height: 1.4;
}

.mega-menu__link-tag {
  display: inline-block;
  font-size: 10px;
  font-weight: var(--font-weight-bold);
  padding: 2px 6px;
  border-radius: 4px;
  margin-top: var(--space-1);
}

.mega-menu__link-tag--core { background: #FEF2F2; color: var(--color-primary); }
.mega-menu__link-tag--built { background: #EEF2FF; color: #4F46E5; }

.mega-menu__separator {
  border-top: 1px solid var(--color-line);
  padding-top: var(--space-3);
  margin-top: var(--space-2);
}

/* --- Mega Menu Footer --- */

.mega-menu__footer {
  border-top: 1px solid var(--color-line);
  padding-top: var(--space-4);
  margin-top: var(--space-4);
  display: flex;
  align-items: center;
  gap: var(--space-6);
}

.mega-menu__footer-link {
  font-size: var(--text-sm);
  font-weight: var(--font-weight-bold);
  color: var(--color-primary);
  display: flex;
  align-items: center;
  gap: var(--space-2);
  text-decoration: none;
}

.mega-menu__footer-link:hover {
  color: var(--color-primary-dark);
}

/* ==========================================================================
   Industries Dropdown (Simpler)
   ========================================================================== */

.industries-menu {
  position: absolute;
  top: 100%;
  left: 0;
  right: 0;
  background: var(--color-white);
  border-top: 1px solid var(--color-line);
  box-shadow: var(--shadow-lg);
  opacity: 0;
  visibility: hidden;
  transform: translateY(-8px);
  transition: opacity var(--duration-normal) var(--ease-default),
              transform var(--duration-normal) var(--ease-default),
              visibility var(--duration-normal) var(--ease-default);
}

.industries-menu--open {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.industries-menu__inner {
  max-width: 960px;
  margin: 0 auto;
  padding: var(--space-8);
}

.industries-menu__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-4);
}

.industry-card {
  display: flex;
  align-items: flex-start;
  gap: var(--space-3);
  padding: var(--space-4);
  border-radius: var(--radius-sm);
  text-decoration: none;
  transition: background var(--duration-fast) var(--ease-default);
}

.industry-card:hover {
  background: var(--color-soft);
}

.industry-card--featured {
  border: 1px solid;
  border-radius: var(--radius-md);
}

.industry-card--pharmacy {
  border-color: #C7D2FE;
  background: #FAFAFF;
}

.industry-card--pharmacy:hover {
  background: #F0F0FF;
}

.industry-card--clinic {
  border-color: #BBF7D0;
  background: #F8FFF8;
}

.industry-card--clinic:hover {
  background: #EFFFEF;
}

.industry-card__icon {
  width: 40px;
  height: 40px;
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
  flex-shrink: 0;
}

.industry-card__title {
  font-size: var(--text-sm);
  font-weight: var(--font-weight-bold);
  color: var(--color-ink);
  display: block;
}

.industry-card__desc {
  font-size: var(--text-xs);
  color: var(--color-muted);
  line-height: 1.4;
}

.industry-card__badge {
  display: inline-block;
  font-size: 10px;
  font-weight: var(--font-weight-bold);
  padding: 2px 6px;
  border-radius: 4px;
  margin-top: var(--space-1);
}

/* --- Header spacer (push content below fixed header) --- */

.site-header-spacer {
  height: 72px;
}

/* Hide spacer when hero overlaps header (dark hero pages) */
.has-hero-overlap .site-header-spacer {
  display: none;
}