.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 40;
  background: var(--nav-bg, rgba(245,247,251,0.92));
  border-bottom: 1px solid var(--border-soft, rgba(30,58,95,0.12));
  backdrop-filter: blur(18px);
}

.site-header .nav-shell {
  max-width: 1180px;
  margin: 0 auto;
  height: 75px;
  padding: 0 18px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.site-header .nav-left {
  display: flex;
  align-items: center;
  gap: 18px;
}

.site-header .brand-link {
  display: inline-flex;
  align-items: center;
}

.site-header .brand-mark {
  width: 160px;
  height: auto;
  filter: var(--logo-filter, none);
  transition: filter var(--transition, 0.28s ease);
}

.site-header .nav-links {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
  font-size: 0.92rem;
  color: var(--ink-muted, #68738a);
  font-family: 'Inter', sans-serif;
}

.site-header .nav-link {
  border-radius: 999px;
  padding: 6px 10px;
  position: relative;
  transition: color var(--transition, 0.28s ease), background var(--transition, 0.28s ease);
}


.site-header .nav-link::after {
  content: '';
  position: absolute;
  left: 10px;
  right: 10px;
  bottom: 2px;
  height: 2px;
  border-radius: 999px;
  background: linear-gradient(120deg, var(--accent-primary, #8BB3E8), var(--accent-secondary, #764BA2));
  transform: scaleX(0);
  transform-origin: center;
  transition: transform var(--transition, 0.28s ease);
}

.site-header .nav-link:hover {
  color: var(--accent-primary, #8BB3E8);
  background: rgba(139,179,232,0.12);
}


.site-header .nav-link.nav-active {
  color: var(--accent-primary, #8BB3E8);
  background: rgba(139,179,232,0.16);
}

.site-header .nav-link.nav-active::after {
  transform: scaleX(1);
}

.site-header .nav-actions {
  display: flex;
  align-items: center;
  gap: 12px;
}

.site-header .btn {
  padding: 10px 22px;
  border-radius: var(--radius-md, 9px);
  border: 1px solid var(--border-soft, rgba(30,58,95,0.12));
  background: transparent;
  font-weight: 600;
  font-family: 'Inter', sans-serif;
  color: var(--ink-primary, #3a4357);
  transition: background var(--transition, 0.28s ease), color var(--transition, 0.28s ease), border var(--transition, 0.28s ease);
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  text-decoration: none;
  gap: 8px;
}

.site-header .btn:hover {
  background: var(--surface-hover, rgba(139,179,232,0.16));
}


.site-header .btn-primary {
  background: linear-gradient(125deg, var(--accent-primary, #8BB3E8), var(--accent-secondary, #764BA2));
  color: #ffffff;
  border: none;
  box-shadow: 0 20px 35px var(--shadow-accent, rgba(139,179,232,0.35));
}

.site-header .btn-primary:hover {
  filter: none;
  box-shadow: 0 12px 24px rgba(118, 75, 162, 0.25);
  transform: translateY(-1px);
}

.site-header .theme-toggle {
  width: 48px;
  height: 24px;
  border-radius: 14px;
  border: 1px solid var(--border-soft, rgba(30,58,95,0.12));
  background: var(--surface, rgba(255,255,255,0.98));
  position: relative;
  cursor: pointer;
  transition: background var(--transition, 0.28s ease), border var(--transition, 0.28s ease);
}

.site-header .theme-toggle::before {
  content: '';
  position: absolute;
  top: 3px;
  left: 3px;
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: linear-gradient(120deg, var(--accent-primary, #8BB3E8), var(--accent-secondary, #764BA2));
  transition: transform var(--transition, 0.28s ease);
}

[data-theme="dark"] .site-header .theme-toggle::before {
  transform: translateX(22px);
}

.site-header .desktop-coming-soon {
  display: inline-block;
  padding: 10px 22px;
  border-radius: var(--radius-md, 9px);
  background: rgba(139,179,232,0.18);
  color: var(--ink-muted, #68738a);
  font-weight: 600;
  font-size: 0.9rem;
}


.site-header .nav-coming-soon { font-size: 0.85rem; }
.site-header .pricing-coming-soon { display: block; margin-top: 8px; font-size: 0.85rem; color: var(--ink-muted, #68738a); }

.site-header .mobile-menu-toggle {
  display: none;
  background: transparent;
  border: none;
  color: var(--ink-primary, #3a4357);
  cursor: pointer;
}

.site-header .mobile-menu {
  position: absolute;
  top: 75px;
  left: 0;
  right: 0;
  background: var(--surface, rgba(255,255,255,0.98));
  border-bottom: 1px solid var(--border-soft, rgba(30,58,95,0.12));
  box-shadow: 0 12px 24px var(--shadow-soft, rgba(30,58,95,0.15));
  padding: 16px 24px;
}


.site-header .mobile-menu nav {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.site-header .mobile-link,
.site-header .mobile-cta,
.site-header .mobile-coming-soon {
  font-size: 1rem;
  color: var(--ink-primary, #3a4357);
  font-family: 'Inter', sans-serif;
  text-align: left;
  padding: 8px 0;
}


.site-header .mobile-link:hover { color: var(--accent-primary, #8BB3E8); }
.site-header .mobile-coming-soon { color: var(--ink-muted, #68738a); }

.hidden { display: none !important; }

@media (max-width: 900px) {
  .site-header .nav-links { display: none; }
  .site-header .mobile-menu-toggle { display: inline-flex; }
  .site-header .nav-actions { gap: 10px; }
  .site-header .nav-actions .btn-primary,
  .site-header .nav-actions .nav-login { display: none; }
}