/* ==========================================================================
   Professional Header & Top Bar Navigation
   ========================================================================== */

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

/* Top bar layout */
.top-bar__inner {
  display: grid;
  grid-template-columns: 1fr auto auto;
  align-items: center;
  gap: 1.25rem;
}

.top-bar__info a,
.top-bar__info span {
  font-size: 0.8125rem;
  font-weight: 500;
  letter-spacing: 0.01em;
}

.top-bar__info svg {
  flex-shrink: 0;
  opacity: 0.85;
}

.top-bar__icon {
  font-size: 0.875rem;
  opacity: 0.85;
}

/* Rounded search box */
.top-bar-search {
  display: flex;
  align-items: stretch;
  width: min(320px, 100%);
  height: 36px;
  border: 1px solid rgba(255, 255, 255, 0.25);
  background: rgba(255, 255, 255, 0.1);
  border-radius: 8px;
  overflow: hidden;
  transition: border-color 0.2s ease, box-shadow 0.2s ease, background 0.2s ease;
}

.top-bar-search:focus-within {
  border-color: rgba(0, 212, 232, 0.65);
  background: rgba(255, 255, 255, 0.12);
  box-shadow: 0 0 0 2px rgba(0, 212, 232, 0.15);
}

.top-bar-search__input {
  flex: 1;
  min-width: 0;
  padding: 0 0.75rem;
  border: none;
  background: transparent;
  color: #fff;
  font-size: 0.8125rem;
  font-weight: 500;
  outline: none;
  border-radius: 8px 0 0 8px;
}

.top-bar-search__input::placeholder {
  color: rgba(255, 255, 255, 0.5);
}

.top-bar-search__btn {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  flex-shrink: 0;
  border: none;
  border-left: 1px solid rgba(255, 255, 255, 0.15);
  background: rgba(0, 212, 232, 0.18);
  color: #fff;
  cursor: pointer;
  border-radius: 0 8px 8px 0;
  transition: background 0.2s ease, color 0.2s ease;
}

.top-bar-search__btn:hover {
  background: rgba(0, 212, 232, 0.32);
  color: #fff;
}

/* Main navbar — always visible & readable */
.site-header {
  background: #ffffff;
  border-bottom: 1px solid rgba(11, 61, 107, 0.14);
  box-shadow: 0 2px 12px rgba(15, 23, 42, 0.08);
  transition: background 0.3s ease, border-color 0.3s ease, box-shadow 0.3s ease;
}

.top-bar {
  transition: background 0.3s ease, border-color 0.3s ease;
}

.site-header.transparent .navbar {
  background: transparent;
}

.navbar {
  gap: 1rem;
}

.logo {
  font-size: 1.125rem;
  font-weight: 800;
  letter-spacing: -0.02em;
}

.logo svg,
.site-logo__img {
  border-radius: 50%;
  box-shadow: 0 2px 8px rgba(11, 61, 107, 0.15);
}

.site-logo--header .site-logo__img {
  width: 48px;
  height: 48px;
}

.site-logo--header .site-logo__title {
  font-size: 1rem;
}

/* Nav links — clean professional style */
.nav-menu {
  gap: 0.125rem;
}

.nav-menu > li > a,
.nav-menu > li > button.nav-trigger {
  position: relative;
  padding: 0.55rem 0.9rem;
  font-size: 0.875rem;
  font-weight: 600;
  letter-spacing: 0.01em;
  color: #1e293b;
  border-radius: 6px;
  transition: color 0.2s ease, background 0.2s ease;
}

.nav-menu > li > a::after,
.nav-menu > li > button.nav-trigger::after {
  content: '';
  position: absolute;
  left: 0.9rem;
  right: 0.9rem;
  bottom: 0.35rem;
  height: 2px;
  background: var(--accent);
  transform: scaleX(0);
  transition: transform 0.25s ease;
}

.nav-menu > li > a:hover,
.nav-menu > li > button.nav-trigger:hover {
  color: #0f4c81;
  background: rgba(15, 76, 129, 0.07);
}

.nav-menu > li > a.active {
  color: #0f4c81;
  background: rgba(0, 188, 212, 0.1);
  font-weight: 700;
}

.nav-menu > li > a.active::after {
  transform: scaleX(1);
  background: #06b6d4;
}

.nav-menu > li > a:hover::after {
  transform: scaleX(1);
}

.nav-menu > li.has-dropdown:hover > .nav-trigger,
.nav-menu > li.has-dropdown:focus-within > .nav-trigger {
  color: var(--primary);
  background: rgba(15, 76, 129, 0.05);
}

/* Nav action buttons */
.nav-actions {
  gap: 0.625rem;
}

.nav-icon-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 38px;
  height: 38px;
  padding: 0;
  border: 1px solid rgba(11, 61, 107, 0.12);
  border-radius: 8px;
  background: #f8fafc;
  color: #475569;
  cursor: pointer;
  transition: border-color 0.2s ease, color 0.2s ease, background 0.2s ease;
}

.nav-icon-btn:hover {
  border-color: rgba(0, 188, 212, 0.4);
  color: var(--primary);
  background: rgba(0, 188, 212, 0.06);
}

.theme-icon--sun { display: none; }
[data-theme="dark"] .theme-icon--moon { display: none; }
[data-theme="dark"] .theme-icon--sun { display: block; }

.nav-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.45rem;
  min-height: 38px;
  padding: 0.5rem 1rem;
  font-size: 0.8125rem;
  font-weight: 700;
  letter-spacing: 0.02em;
  text-decoration: none;
  border-radius: 8px;
  white-space: nowrap;
  transition: transform 0.2s ease, box-shadow 0.2s ease, background 0.2s ease, border-color 0.2s ease;
}

.nav-btn svg {
  flex-shrink: 0;
}

.nav-btn--primary {
  color: #fff;
  background: linear-gradient(135deg, #0F4C81 0%, #1565C0 100%);
  border: 1px solid rgba(15, 76, 129, 0.2);
  box-shadow: 0 2px 8px rgba(15, 76, 129, 0.22);
}

.nav-btn--primary:hover {
  transform: translateY(-1px);
  box-shadow: 0 4px 14px rgba(15, 76, 129, 0.32);
  color: #fff;
}

.nav-btn--call {
  color: #fff;
  background: linear-gradient(135deg, #00838F 0%, #00ACC1 100%);
  border: 1px solid rgba(0, 172, 193, 0.3);
  box-shadow: 0 2px 8px rgba(0, 172, 193, 0.25);
}

.nav-btn--call:hover {
  transform: translateY(-1px);
  box-shadow: 0 4px 14px rgba(0, 172, 193, 0.35);
  color: #fff;
}

.nav-toggle {
  display: none;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border: 1px solid rgba(11, 61, 107, 0.12);
  border-radius: 8px;
  background: #f8fafc;
  color: var(--primary);
  cursor: pointer;
  transition: background 0.2s ease, border-color 0.2s ease;
}

.nav-toggle:hover {
  background: rgba(15, 76, 129, 0.06);
  border-color: rgba(15, 76, 129, 0.2);
}

/* Dropdown refinement */
.nav-dropdown {
  border-radius: 0;
  border: 1px solid rgba(11, 61, 107, 0.1);
  box-shadow: 0 12px 32px rgba(15, 23, 42, 0.12);
}

.nav-dropdown li a {
  border-radius: 0;
}

/* Hero page — frosted bar, dark readable links */
.hero-page .site-header.header-over-hero:not(.scrolled) {
  background: rgba(255, 255, 255, 0.97);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid rgba(11, 61, 107, 0.12);
  box-shadow: 0 4px 20px rgba(15, 23, 42, 0.1);
}

.hero-page .site-header.header-over-hero:not(.scrolled) .nav-menu > li > a,
.hero-page .site-header.header-over-hero:not(.scrolled) .nav-menu > li > button.nav-trigger {
  color: #1e293b;
}

.hero-page .site-header.header-over-hero:not(.scrolled) .nav-menu > li > a.active {
  color: #0f4c81;
}

.hero-page .site-header.scrolled {
  background: #ffffff;
  box-shadow: 0 2px 16px rgba(15, 23, 42, 0.1);
}

/* Responsive */
@media (max-width: 1200px) {
  .top-bar__inner {
    grid-template-columns: 1fr auto;
    grid-template-areas:
      "info actions"
      "search search";
  }

  .top-bar__info { grid-area: info; }
  .top-bar-search { grid-area: search; width: 100%; max-width: none; }
  .top-bar__actions { grid-area: actions; }
}

@media (max-width: 1024px) {
  .nav-menu,
  .nav-actions .nav-btn {
    display: none;
  }

  .nav-toggle {
    display: inline-flex;
  }

  .nav-actions .theme-toggle {
    display: inline-flex;
  }
}

@media (max-width: 768px) {
  :root {
    --header-height: 56px;
    --topbar-height: 0px;
    --site-chrome-height: var(--header-height);
  }

  /* Search lives in mobile sidebar only */
  .top-bar {
    display: none;
  }

  .site-header {
    margin-top: 0;
    border-radius: 0;
    border-top: none;
    box-shadow: 0 2px 12px rgba(15, 23, 42, 0.08);
  }

  .navbar {
    height: var(--header-height);
    min-height: var(--header-height);
  }

  .nav-toggle {
    display: none !important;
  }

  .logo {
    font-size: 1rem;
  }

  .logo svg,
  .site-logo--header .site-logo__img {
    width: 40px;
    height: 40px;
  }
}

@media (max-width: 480px) {
  .site-header {
    margin-top: 0;
  }
}

/* Mobile drawer search */
.mobile-nav__search {
  padding: 0 0 1rem;
  margin-bottom: 0.5rem;
  border-bottom: 1px solid var(--border);
}

.top-bar-search--mobile {
  width: 100%;
  height: 40px;
  border-radius: 8px;
  border-color: var(--border);
  background: var(--bg-alt);
}

.top-bar-search--mobile .top-bar-search__input {
  color: var(--text);
}

.top-bar-search--mobile .top-bar-search__input::placeholder {
  color: var(--text-muted);
}

.top-bar-search--mobile .top-bar-search__btn {
  border-left-color: var(--border);
  background: var(--primary);
  color: #fff;
}

.top-bar-search--mobile:focus-within {
  border-color: rgba(0, 188, 212, 0.5);
  box-shadow: 0 0 0 2px rgba(0, 188, 212, 0.12);
}