/* ===== Shared Site Header & Navigation ===== */
/* Included on every page via <link rel="stylesheet" href="/css/site-header.css">.
   Classes are prefixed with "site-" to avoid collisions with per-page/per-cluster styles. */

.site-header {
  position: sticky;
  top: 0;
  z-index: 500;
  background: rgba(255, 255, 255, 0.94);
  backdrop-filter: saturate(180%) blur(10px);
  -webkit-backdrop-filter: saturate(180%) blur(10px);
  border-bottom: 1px solid #e7ebf3;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Arial, sans-serif;
}

.site-header-inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 12px 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.site-logo {
  display: flex;
  align-items: center;
  gap: 6px;
  font-weight: 800;
  font-size: 1.2rem;
  color: #2b5cff;
  text-decoration: none;
  white-space: nowrap;
}

.site-logo .site-logo-dot {
  color: #b45309;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 4px;
}

.site-nav a {
  text-decoration: none;
  color: #5b6472;
  font-weight: 600;
  font-size: 0.9rem;
  padding: 9px 13px;
  border-radius: 10px;
  transition: background-color .15s, color .15s;
  white-space: nowrap;
}

.site-nav a:hover,
.site-nav a.site-nav-active {
  background: #eef2ff;
  color: #2b5cff;
}

.site-header-cta {
  display: flex;
  align-items: center;
  gap: 10px;
}

.site-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 9px 16px;
  border-radius: 999px;
  font-weight: 700;
  font-size: 0.86rem;
  text-decoration: none;
  border: 1.5px solid #dbe3ff;
  background: #fff;
  color: #2b5cff;
  white-space: nowrap;
  transition: background-color .15s, transform .15s, box-shadow .15s;
}

.site-btn:hover {
  background: #eef2ff;
}

.site-btn-primary {
  background: linear-gradient(135deg, #c2410c 0%, #c62828 100%);
  color: #fff;
  border: none;
  box-shadow: 0 6px 16px rgba(255, 107, 107, 0.35);
}

.site-btn-primary:hover {
  transform: translateY(-1px);
  box-shadow: 0 8px 20px rgba(255, 107, 107, 0.45);
  background: linear-gradient(135deg, #9a3412 0%, #b71c1c 100%);
}

.site-mobile-nav .site-mobile-primary {
  background: linear-gradient(135deg, #c2410c 0%, #c62828 100%);
  color: #fff;
  border-radius: 12px;
  text-align: center;
  margin: 6px 0 10px;
  font-weight: 800;
}

.site-hamburger {
  display: none;
  flex-direction: column;
  gap: 4px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
}

.site-hamburger span {
  width: 22px;
  height: 2px;
  background: #1f2937;
  border-radius: 2px;
  transition: transform .2s, opacity .2s;
}

.site-hamburger.site-open span:nth-child(1) { transform: translateY(6px) rotate(45deg); }
.site-hamburger.site-open span:nth-child(2) { opacity: 0; }
.site-hamburger.site-open span:nth-child(3) { transform: translateY(-6px) rotate(-45deg); }

.site-mobile-nav {
  display: none;
  flex-direction: column;
  gap: 2px;
  padding: 8px 20px 16px;
  border-top: 1px solid #e7ebf3;
  background: #fff;
}

.site-mobile-nav.site-open {
  display: flex;
}

.site-mobile-nav a {
  text-decoration: none;
  color: #1f2937;
  font-weight: 600;
  padding: 12px 8px;
  border-bottom: 1px solid #f1f3f9;
  font-size: 0.96rem;
}

.site-mobile-nav a:last-child {
  border-bottom: none;
}

@media (max-width: 860px) {
  .site-nav { display: none; }
  .site-hamburger { display: flex; }
  .site-header-cta .site-btn-desktop-only { display: none; }
}