/* ============================================================
   header.css — Site Header
   ============================================================ */

/* ---------- Site Header Wrapper ---------- */
#site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: var(--z-header);
  transition: all var(--transition-base);
}

/* ---------- Top Bar ---------- */
.header-topbar {
  background: transparent;
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
  padding: 0.45rem 0;
  transition: all 0.4s ease;
  overflow: hidden;
  max-height: 2.8rem;
}

.topbar-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.topbar-contacts {
  display: flex;
  align-items: center;
  gap: 1.5rem;
}

.topbar-contacts a {
  display: flex;
  align-items: center;
  gap: 0.45rem;
  font-size: var(--fs-xs);
  color: var(--clr-text-muted);
  font-family: var(--font-body);
  font-weight: 400;
  transition: color var(--transition-fast);
}

.topbar-contacts a:hover {
  color: var(--clr-primary-light);
}

.topbar-contacts a i {
  color: var(--clr-accent);
  font-size: 0.7rem;
}

.topbar-socials {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.topbar-socials a {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 26px;
  height: 26px;
  border-radius: 50%;
  background: rgba(34, 129, 196, 0.08);
  border: 1px solid rgba(34, 129, 196, 0.18);
  color: var(--clr-primary-dark);
  font-size: 0.7rem;
  transition: all var(--transition-fast);
}

.topbar-socials a:hover {
  background: var(--clr-primary);
  border-color: var(--clr-primary);
  color: var(--clr-white);
  transform: translateY(-2px);
}

/* ---------- Main Bar ---------- */
.header-mainbar {
  padding: 0.9rem 0;
  transition: padding var(--transition-base);
}

/* Transparent by default (on top of page) */
#site-header.at-top {
  background: transparent;
}

/* Frosted glass on scroll */
#site-header.scrolled {
  background: rgba(255, 255, 255, 0.88);
  backdrop-filter: blur(22px) saturate(150%);
  -webkit-backdrop-filter: blur(22px) saturate(150%);
  border-bottom: 1px solid rgba(34, 129, 196, 0.15);
  box-shadow: 0 4px 30px rgba(34, 129, 196, 0.12);
}

#site-header.scrolled .header-topbar {
  max-height: 0;
  padding: 0;
  border-bottom: none;
}

#site-header.scrolled .header-mainbar {
  padding: 0;
}

/* ---- Header at-top: white content for dark video banner ---- */
#site-header.at-top .topbar-contacts a {
  color: rgba(255, 255, 255, 0.75);
}

#site-header.at-top .topbar-contacts a:hover {
  color: #ffffff;
}

#site-header.at-top .topbar-socials a {
  background: rgba(255, 255, 255, 0.1);
  border-color: rgba(255, 255, 255, 0.2);
  color: rgba(255, 255, 255, 0.8);
}

#site-header.at-top .topbar-socials a:hover {
  background: var(--clr-primary);
  border-color: var(--clr-primary);
  color: #ffffff;
}

#site-header.at-top .nav-link {
  color: rgba(255, 255, 255, 0.88);
}

/* #site-header.at-top .nav-link:hover {
  color: #ffffff;
  background: rgba(255, 255, 255, 0.1);
}

#site-header.at-top .nav-link.active {
  color: #ffffff;
} */

#site-header.at-top .icon-btn {
  background: rgba(255, 255, 255, 0.1);
  border-color: rgba(255, 255, 255, 0.18);
  color: rgba(255, 255, 255, 0.88);
}

#site-header.at-top .icon-btn:hover {
  background: rgba(255, 255, 255, 0.2);
  border-color: rgba(255, 255, 255, 0.35);
  color: #ffffff;
}

#site-header.at-top .hamburger span {
  background: #ffffff;
}

#site-header.at-top .header-logo img {
  filter: brightness(0) invert(1)
    drop-shadow(0 2px 16px rgba(255, 255, 255, 0.25));
}

.mainbar-inner {
  display: flex;
  align-items: center;
  gap: 1.5rem;
  justify-content: space-between;
}

/* ---------- Logo ---------- */
.header-logo {
  flex-shrink: 0;
  z-index: 10;
}

.header-logo a {
  display: flex;
  align-items: center;
}

.header-logo img {
  height: 50px;
  width: auto;
  filter: drop-shadow(0 2px 12px rgba(59, 147, 209, 0.3));
  transition: filter var(--transition-base);
}

.header-logo img:hover {
  filter: drop-shadow(0 4px 20px rgba(59, 147, 209, 0.55));
}

/* ---------- Navigation ---------- */
.header-nav {
  flex: 1;
  display: flex;
  justify-content: center;
}

.nav-list {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.nav-item {
  position: relative;
}

.nav-link {
  display: flex;
  align-items: center;
  gap: 0.35rem;
  font-family: var(--font-heading);
  font-size: var(--fs-base);
  font-weight: 500;
  color: var(--clr-text);
  padding: 0.5rem 0.9rem;
  border-radius: var(--radius-sm);
  transition: all var(--transition-fast);
  letter-spacing: 0.01em;
  white-space: nowrap;
  box-shadow: 0 0 5px rgba(255, 255, 255, 0.5);
}
header.scrolled .nav-link{
  box-shadow: 0 0 5px rgba(0, 0, 0, 0.2);
}
.nav-link:hover,
.nav-link.active {
  color: var(--clr-primary);
  background: rgba(34, 129, 196, 0.08);
}
#site-header.at-top .nav-link:hover,
#site-header.at-top .nav-link.active {
  color: #ffffff;
  background: rgba(255, 255, 255, 0.1);
}

.nav-link i.fa-chevron-down {
  font-size: 0.6rem;
  transition: transform var(--transition-fast);
}

.nav-item:hover .nav-link i.fa-chevron-down {
  transform: rotate(180deg);
}

/* Dropdown */
.nav-dropdown {
  position: absolute;
  top: 100%;
  left: 50%;
  transform: translateX(-50%);
  min-width: 220px;
  background: rgba(255, 255, 255, 0.96);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1px solid rgba(34, 129, 196, 0.16);
  border-radius: var(--radius-md);
  box-shadow:
    0 20px 60px rgba(34, 129, 196, 0.15),
    0 1px 0 rgba(34, 129, 196, 0.08) inset;
  padding: 0.5rem;
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  transform: translateX(-50%) translateY(-8px);
  transition: all 0.25s ease;
  z-index: 999;
}

.nav-item:hover .nav-dropdown {
  opacity: 1;
  visibility: visible;
  pointer-events: all;
  transform: translateX(-50%) translateY(0);
}

.nav-dropdown a {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  padding: 0.6rem 0.9rem;
  border-radius: var(--radius-sm);
  font-size: var(--fs-sm);
  color: var(--clr-text-muted);
  transition: all var(--transition-fast);
}

.nav-dropdown a i {
  color: var(--clr-primary);
  width: 16px;
  text-align: center;
  font-size: 0.75rem;
}

.nav-dropdown a:hover {
  background: rgba(34, 129, 196, 0.08);
  color: var(--clr-primary-dark);
}

/* ---------- Header Actions ---------- */
.header-actions {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  flex-shrink: 0;
}

.icon-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 38px;
  height: 38px;
  border-radius: 50%;
  background: rgba(34, 129, 196, 0.07);
  border: 1px solid rgba(34, 129, 196, 0.15);
  color: var(--clr-primary);
  font-size: 0.95rem;
  transition: all var(--transition-fast);
  cursor: pointer;
}

.icon-btn:hover {
  background: rgba(34, 129, 196, 0.14);
  border-color: rgba(34, 129, 196, 0.35);
  color: var(--clr-primary-dark);
  transform: scale(1.08);
}

.header-cta-btn {
  background: linear-gradient(
    135deg,
    var(--clr-accent) 0%,
    var(--clr-accent-dark) 100%
  );
  color: var(--clr-white) !important;
  font-family: var(--font-heading);
  font-size: var(--fs-sm);
  font-weight: 600;
  padding: 0.62rem 1.4rem;
  border-radius: var(--radius-full);
  border: none;
  letter-spacing: 0.03em;
  box-shadow: 0 4px 20px rgba(244, 126, 32, 0.4);
  transition: all var(--transition-base);
  white-space: nowrap;
  cursor: pointer;
}

.header-cta-btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 30px rgba(244, 126, 32, 0.55);
}

/* ---------- Hamburger ---------- */
.hamburger {
  display: none;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 5px;
  width: 38px;
  height: 38px;
  cursor: pointer;
  padding: 4px;
  border-radius: var(--radius-sm);
  transition: background var(--transition-fast);
}

.hamburger:hover {
  background: rgba(59, 147, 209, 0.1);
}

.hamburger span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--clr-primary-dark);
  border-radius: 2px;
  transition: all 0.3s ease;
  transform-origin: center;
}

.hamburger.active span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}
.hamburger.active span:nth-child(2) {
  opacity: 0;
  transform: scaleX(0);
}
.hamburger.active span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* ---------- Mobile Menu ---------- */
.mobile-menu {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(245, 250, 255, 0.5);
  backdrop-filter: blur(24px);
  -webkit-backdrop-filter: blur(24px);
  z-index: calc(var(--z-header) - 1);
  display: flex;
  flex-direction: column;
  padding: 8rem 2rem 2rem;
  transform: translateX(100%);
  transition: transform 0.4s cubic-bezier(0.77, 0, 0.175, 1);
  overflow-y: auto;
}

.mobile-menu.open {
  transform: translateX(0);
}

.mobile-nav-list {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
}

.mobile-nav-link {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1rem 1rem;
  font-family: var(--font-heading);
  font-size: var(--fs-lg);
  font-weight: 600;
  color: var(--clr-heading);
  border-bottom: 1px solid rgba(34, 129, 196, 0.1);
  transition: color var(--transition-fast);
}

.mobile-nav-link:hover {
  color: var(--clr-primary);
}

.mobile-sub-list {
  display: none;
  flex-direction: column;
  padding: 0.5rem 0 0.5rem 1.2rem;
  gap: 0.1rem;
}

.mobile-sub-list.open {
  display: flex;
}

.mobile-sub-list a {
  padding: 0.55rem 0.8rem;
  font-size: var(--fs-sm);
  color: var(--clr-text-muted);
  border-radius: var(--radius-sm);
  transition: all var(--transition-fast);
}

.mobile-sub-list a:hover {
  color: var(--clr-primary-light);
  background: rgba(59, 147, 209, 0.08);
}

.mobile-menu-footer {
  margin-top: 2rem;
  padding-top: 1.5rem;
  border-top: 1px solid rgba(59, 147, 209, 0.1);
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

/* ---------- Search Overlay ---------- */
.search-overlay {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  transform: translateY(-110%);
  transition: transform 0.45s cubic-bezier(0.25, 0.46, 0.45, 0.94);
  background: rgba(248, 251, 255, 0.97);
  backdrop-filter: blur(24px) saturate(150%);
  -webkit-backdrop-filter: blur(24px) saturate(150%);
  border-bottom: 1px solid rgba(34, 129, 196, 0.15);
  padding: 1.5rem 0;
  box-shadow: 0 20px 60px rgba(34, 129, 196, 0.15);
}

.search-overlay.open {
  transform: translateY(0);
}

.search-overlay-inner {
  display: flex;
  align-items: center;
  gap: 1rem;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--page-padding);
}

.search-input-wrap {
  flex: 1;
  position: relative;
}

.search-input-wrap i {
  position: absolute;
  left: 1.1rem;
  top: 50%;
  transform: translateY(-50%);
  color: var(--clr-primary);
  font-size: 1.1rem;
}

.search-input {
  width: 100%;
  padding: 0.9rem 1.2rem 0.9rem 3rem;
  background: rgba(255, 255, 255, 0.9);
  border: 1.5px solid rgba(34, 129, 196, 0.2);
  border-radius: var(--radius-full);
  color: var(--clr-text);
  font-size: var(--fs-md);
  outline: none;
  transition: border-color var(--transition-fast);
}

.search-input::placeholder {
  color: var(--clr-text-dim);
}

.search-input:focus {
  border-color: var(--clr-primary);
  background: rgba(255, 255, 255, 1);
  box-shadow: 0 0 0 3px rgba(34, 129, 196, 0.1);
}

.search-submit-btn {
  padding: 0.9rem 2rem;
  background: linear-gradient(
    135deg,
    var(--clr-primary),
    var(--clr-primary-dark)
  );
  color: var(--clr-white);
  border-radius: var(--radius-full);
  font-family: var(--font-heading);
  font-weight: 600;
  font-size: var(--fs-sm);
  border: none;
  cursor: pointer;
  transition: all var(--transition-fast);
  white-space: nowrap;
}

.search-submit-btn:hover {
  filter: brightness(1.15);
  transform: translateY(-1px);
}

.search-close-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: rgba(34, 129, 196, 0.06);
  border: 1px solid rgba(34, 129, 196, 0.14);
  color: var(--clr-text-muted);
  font-size: 1.1rem;
  cursor: pointer;
  transition: all var(--transition-fast);
  flex-shrink: 0;
}

.search-close-btn:hover {
  background: rgba(244, 126, 32, 0.15);
  border-color: rgba(244, 126, 32, 0.3);
  color: var(--clr-accent);
}

/* ---------- Responsive ---------- */
@media (max-width: 1100px) {
  .header-nav {
    display: none;
  }
  .hamburger {
    display: flex;
  }
  .header-cta-btn {
    display: none;
  }
}

@media (max-width: 768px) {
  #site-header.scrolled .header-mainbar {
    padding: 0.9rem 0;
  }
  .topbar-contacts .hide-mobile {
    display: none;
  }
  .header-logo img {
    height: 38px;
  }
}

@media (max-width: 480px) {
  .search-submit-btn {
    padding: 0.9rem 1.2rem;
  }
  .topbar-contacts {
    display: none;
  }
  .topbar-socials {
    margin-left: auto;
  }
}