:root {
  --nav-overlap: 3.6rem;
  --nav-safe-gap: 2.9rem;
  --page-top-buffer: 2.9rem;
  --nav-shell-gutter: clamp(0.28rem, 0.8vw, 0.7rem);
  --nav-shell-max-width: 1800px;
  --nav-shell-bg: linear-gradient(135deg, rgba(232, 245, 249, 0.78), rgba(255, 246, 228, 0.78));
  --nav-shell-line: #dce7f1;
  --nav-shell-shadow: 0 12px 30px rgba(18, 35, 56, 0.08);
  --nav-ink: #1b3148;
  --nav-ink-soft: #36526d;
  --nav-hover-bg: #f4f8fb;
  --nav-hover-line: #d6e1ec;
  --nav-active-start: #124f69;
  --nav-active-end: #0f8f89;
  --nav-active-shadow: 0 8px 18px rgba(15, 122, 125, 0.3);
  --nav-cta-bg: #1a3148;
  --nav-cta-bg-hover: #13283d;
  --nav-cta-shadow: 0 10px 22px rgba(14, 31, 47, 0.26);
}

.site-nav-wrap {
  position: sticky;
  top: 0;
  z-index: 1040;
  padding: 0.8rem var(--nav-shell-gutter);
  background: transparent;
  backdrop-filter: none;
  margin-bottom: calc(-1 * var(--nav-overlap));
  transition: none;
}

.site-nav {
  border: 1px solid var(--nav-shell-line);
  border-radius: 16px;
  background: var(--nav-shell-bg);
  box-shadow: var(--nav-shell-shadow);
  max-width: min(var(--nav-shell-max-width), 100%);
  margin-inline: auto;
  backdrop-filter: blur(12px) saturate(125%);
  -webkit-backdrop-filter: blur(12px) saturate(125%);
  padding: 0.5rem 0.55rem;
  will-change: transform;
  transition: border-color 0.2s ease, box-shadow 0.2s ease, transform 0.2s ease;
}

.site-nav a,
.site-nav a:hover {
  text-decoration: none;
}

.site-brand {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  color: var(--nav-ink);
  text-decoration: none;
  font-weight: 800;
  font-size: 1.12rem;
  letter-spacing: 0.01em;
  line-height: 1;
  transition: transform 0.2s ease;
}

.site-brand-mark {
  width: 36px;
  height: 36px;
  border-radius: 11px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(140deg, #0d4f67, #168f89);
  color: #fff;
  font-size: 0.86rem;
  font-weight: 700;
  box-shadow: 0 8px 18px rgba(13, 79, 103, 0.28);
}

.site-nav .navbar-nav {
  gap: 0.25rem;
}

.site-nav-link {
  border: 1px solid transparent;
  border-radius: 999px;
  padding: 0.46rem 0.92rem !important;
  color: var(--nav-ink-soft);
  font-weight: 600;
  line-height: 1.2;
  transition: color 0.2s ease, background-color 0.2s ease, border-color 0.2s ease;
}

.site-nav-link:hover,
.site-nav-link:focus {
  color: var(--nav-ink);
  background: var(--nav-hover-bg);
  border-color: var(--nav-hover-line);
}

.site-nav-link.active-page {
  color: #fff;
  background: linear-gradient(130deg, var(--nav-active-start), var(--nav-active-end));
  border-color: transparent;
  font-weight: 700;
  box-shadow: var(--nav-active-shadow);
}

.site-nav .dropdown-menu {
  border-radius: 12px;
  border: 1px solid var(--nav-shell-line);
  box-shadow: 0 16px 30px rgba(17, 40, 61, 0.1);
  padding: 0.45rem;
  min-width: 15rem;
  margin-top: 0.5rem;
  opacity: 0;
  transform: translateY(8px);
  transform-origin: top right;
  transition: opacity 0.18s ease, transform 0.18s ease;
}

.site-nav .dropdown-menu.show {
  opacity: 1;
  transform: translateY(0);
}

.site-nav .dropdown-item {
  border-radius: 9px;
  padding: 0.5rem 0.65rem;
}

.site-nav .dropdown-item:hover {
  background: #f1f6fb;
}

.site-nav-cta {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  margin-left: 0.5rem;
  border: 1px solid var(--nav-cta-bg);
  border-radius: 999px;
  background: var(--nav-cta-bg);
  color: #fff;
  padding: 0.54rem 1rem;
  font-weight: 700;
  letter-spacing: 0.01em;
  line-height: 1.2;
  transition: transform 0.2s ease, box-shadow 0.2s ease, background-color 0.2s ease, border-color 0.2s ease;
}

.site-nav-search {
  margin-left: 0.45rem;
  margin-right: 0.4rem;
  position: relative;
  align-items: center;
}

.site-nav-search-input {
  width: clamp(180px, 16vw, 240px);
  height: 40px;
  border-radius: 999px;
  border: 1px solid #cfdae6;
  background: rgba(255, 255, 255, 0.88);
  color: var(--nav-ink);
  font-size: 0.9rem;
  font-weight: 500;
  padding: 0 2.5rem 0 0.85rem;
  transition: border-color 0.2s ease, box-shadow 0.2s ease, background-color 0.2s ease;
}

.site-nav-search-input::placeholder {
  color: #6c829b;
}

.site-nav-search-input:focus {
  outline: none;
  border-color: #a4b8cf;
  box-shadow: 0 0 0 0.2rem rgba(15, 143, 137, 0.14);
  background: #fff;
}

.site-nav-search-button {
  position: absolute;
  right: 6px;
  top: 50%;
  transform: translateY(-50%);
  width: 30px;
  height: 30px;
  border: 0;
  border-radius: 999px;
  background: linear-gradient(130deg, var(--nav-active-start), var(--nav-active-end));
  color: #fff;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 8px 16px rgba(15, 122, 125, 0.2);
}

.site-nav-search-button:hover,
.site-nav-search-button:focus {
  background: linear-gradient(130deg, #0f4f69, #0d7b76);
}

.site-nav-cta:hover,
.site-nav-cta:focus {
  transform: translateY(-1px);
  color: #fff;
  background: var(--nav-cta-bg-hover);
  border-color: var(--nav-cta-bg-hover);
  box-shadow: var(--nav-cta-shadow);
}

.site-nav-toggler {
  border: 1px solid #d7e2ed;
  border-radius: 10px;
  width: 42px;
  height: 38px;
  padding: 0;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: #fff;
}

.site-nav-toggler:focus {
  box-shadow: 0 0 0 0.2rem rgba(15, 143, 137, 0.2);
}

.site-nav-toggler-lines {
  display: block;
  width: 18px;
  height: 12px;
  position: relative;
}

.site-nav-toggler-lines::before,
.site-nav-toggler-lines::after,
.site-nav-toggler-lines span {
  content: "";
  position: absolute;
  left: 0;
  width: 100%;
  height: 2px;
  border-radius: 4px;
  background: #203954;
}

.site-nav-toggler-lines::before {
  top: 0;
}

.site-nav-toggler-lines span {
  top: 5px;
}

.site-nav-toggler-lines::after {
  top: 10px;
}

.site-nav-wrap.nav-compact {
  padding-top: 0.8rem;
  padding-bottom: 0.8rem;
}

.site-nav-wrap.nav-compact .site-nav {
  border-color: #d2deea;
  box-shadow: 0 12px 28px rgba(18, 35, 56, 0.15);
  transform: translateY(-1px);
}

.site-nav-wrap.nav-compact .site-brand {
  transform: scale(0.98);
}

.site-nav-wrap.nav-compact .site-brand-mark {
  width: 36px;
  height: 36px;
}

#main-content > :first-child {
  margin-top: calc(-1 * var(--nav-overlap, 3.6rem));
  padding-top: calc(var(--nav-overlap, 3.6rem) + var(--nav-safe-gap, 0.95rem));
}

@media (min-width: 992px) {
  .site-nav .dropdown-menu {
    left: auto;
    right: 0;
  }
}

@media (max-width: 991px) {
  :root {
    --nav-overlap: 2.8rem;
    --nav-safe-gap: 2.1rem;
    --page-top-buffer: 2.1rem;
    --nav-shell-gutter: clamp(0.5rem, 3.5vw, 1rem);
  }

  .site-nav-wrap {
    margin-bottom: calc(-1 * var(--nav-overlap));
  }

  .site-nav {
    border-radius: 14px;
  }

  .site-nav .navbar-collapse {
    margin-top: 0.75rem;
    padding-top: 0.35rem;
    border-top: 1px solid #e1eaf3;
  }

  .site-nav .navbar-nav {
    gap: 0.35rem;
  }

  .site-nav .navbar-nav .nav-link {
    width: 100%;
  }

  .site-nav .dropdown-menu {
    min-width: 100%;
    margin-top: 0.35rem;
    transform-origin: top center;
  }

  .site-nav-cta {
    width: 100%;
    margin: 0.65rem 0 0;
  }

  .site-nav-search {
    margin: 0.65rem 0 0;
  }

  .site-nav-wrap.nav-compact .site-nav {
    transform: none;
  }
}