/* css/navigation.css — announcement banner, header, hamburger, mobile nav */

/* Announcement Banner */
.announcement-banner {
  background: linear-gradient(90deg, #0f172a 0%, #1e3a5f 50%, #0f172a 100%);
  color: white;
  text-align: center;
  padding: var(--space-xs) var(--space-lg);
  font-size: var(--font-size-sm);
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.announcement-banner a {
  color: rgba(255, 255, 255, 0.9);
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  gap: var(--space-sm);
  transition: color 0.2s ease;
}

.announcement-banner a:hover {
  color: white;
}

.announcement-banner a:hover .banner-arrow {
  transform: translateX(3px);
}

.banner-text {
  display: inline-flex;
  align-items: center;
  gap: var(--space-sm);
}

.banner-badge {
  background: linear-gradient(135deg, #10b981 0%, #059669 100%);
  color: white;
  font-size: 0.7rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  padding: 0.2em 0.6em;
  border-radius: 4px;
}

.banner-arrow {
  transition: transform 0.2s ease;
}

/* Header */
.main-header {
  padding-top: var(--space-lg);
  padding-bottom: var(--space-lg);
}

.main-header .container {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.main-nav {
  display: none;
}

.mobile-nav-toggle {
  display: block;
  background: none;
  border: none;
  padding: var(--space-sm);
  cursor: pointer;
  width: auto;
  height: auto;
  min-width: 44px;
  min-height: 44px;
  position: relative;
  z-index: 1000;
  border-radius: 6px;
}

.mobile-nav-toggle:focus-visible {
  outline: 2px solid var(--color-focus-ring);
  outline-offset: 2px;
  background-color: var(--color-background-subtle);
}

.hamburger-icon {
  display: block;
  width: 24px;
  height: 2px;
  background-color: var(--color-text);
  position: relative;
  transition: background-color 0.2s ease-in-out;
}

.hamburger-icon::before,
.hamburger-icon::after {
  content: "";
  position: absolute;
  width: 100%;
  height: 2px;
  background-color: var(--color-text);
  left: 0;
  transition: transform 0.3s ease-in-out;
}

.hamburger-icon::before {
  top: -8px;
}

.hamburger-icon::after {
  bottom: -8px;
}

/* Mobile Nav Open State */
/* Overlay state is mobile-only: above 900px the toggle is hidden and
   css/responsive.css restores the inline desktop nav, so the fixed
   fullscreen overlay + scroll lock must not persist after a resize. */
@media (max-width: 899px) {
  .nav-open {
    overflow: hidden;
  }

  .nav-open .main-nav {
    display: flex;
    flex-direction: column;
    position: fixed;
    top: 0;
    right: 0;
    bottom: 0;
    left: 0;
    background-color: var(--color-background);
    padding: var(--space-xl) var(--space-lg);
    z-index: 999;
    overflow-y: auto;
  }

  .nav-open .nav-links {
    list-style: none;
    padding: 0;
    margin: auto 0;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-md);
    text-align: center;
    width: 100%;
  }

  .nav-open .nav-links li {
    width: 100%;
    display: flex;
    flex-direction: column;
    align-items: center;
  }

  .nav-open .nav-links a {
    font-size: var(--font-size-2xl);
    text-align: center;
  }

  .nav-open .nav-links .dropdown {
    width: 100%;
    display: flex;
    flex-direction: column;
    align-items: center;
  }

  .nav-open .nav-links .dropdown-toggle {
    font-size: var(--font-size-2xl);
    text-align: center;
    justify-content: center;
  }

  .nav-open .nav-links .btn {
    width: 100%;
    max-width: 300px;
    justify-content: center;
    text-align: center;
  }

  .nav-open .hamburger-icon {
    background-color: transparent;
  }

  .nav-open .hamburger-icon::before {
    transform: translateY(8px) rotate(45deg);
  }

  .nav-open .hamburger-icon::after {
    transform: translateY(-8px) rotate(-45deg);
  }
}