/* ================================================================
   Site navbar — shared across all pages (loaded via base.html)
   landing-page and auth-page specific overrides stay in their own
   CSS files (home.css and auth.css).
   ================================================================ */

/* Base .site-nav: light background for all non-landing pages */
.site-nav {
  position: relative;
  background: rgba(248, 250, 252, 0.97);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid rgba(15, 23, 41, 0.08);
  box-shadow: 0 1px 0 rgba(15, 23, 41, 0.04);
  z-index: 1000;
}

.site-nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-block: 1.25rem;
  transition: padding 0.3s var(--ease-out);
}

.site-nav-brand {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  position: relative;
  z-index: 1001;
}

.site-nav-logo {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-family: 'Space Grotesk', sans-serif;
  font-weight: 700;
  font-size: 1.3rem;
  color: var(--navy);
  transition: var(--transition-fast);
  position: relative;
  z-index: 1001;
}

.site-nav-logo .logo-mark {
  display: flex;
  color: var(--sage);
  transition: transform 0.6s var(--ease-spring);
}

.site-nav-logo:hover .logo-mark {
  transform: rotate(120deg);
}

.site-nav-logo:hover {
  color: var(--sage);
}

.site-nav-logo-img {
  height: 42px;
  width: auto;
  display: block;
  border-radius: 8px;
  background: #fff;
  padding: 4px 8px;
  box-shadow: 0 1px 4px rgba(0, 0, 0, 0.12);
}

.site-nav-brand-sep {
  width: 1px;
  height: 28px;
  background: rgba(15, 23, 41, 0.15);
  flex-shrink: 0;
}

.site-nav-observatory-chip {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: rgba(255, 255, 255, 0.98);
  border-radius: 8px;
  padding: 4px 8px;
  border: 1px solid rgba(15, 23, 41, 0.1);
  box-shadow: 0 1px 3px rgba(15, 23, 41, 0.08);
}

.site-nav-observatory-img {
  height: 34px;
  width: auto;
  display: block;
  opacity: 1;
}

.site-nav-actions {
  display: flex;
  align-items: center;
  gap: 0.25rem;
}

.site-nav-link {
  font-size: var(--fs-sm);
  font-weight: 500;
  padding: 0.5rem 1rem;
  border-radius: var(--radius-sm);
  transition: var(--transition-fast);
  color: var(--text-secondary, #52525b);
  position: relative;
}

.site-nav-link::after {
  content: '';
  position: absolute;
  bottom: 4px;
  left: 50%;
  width: 0;
  height: 2px;
  background: var(--sage);
  border-radius: 2px;
  transition: width 0.3s var(--ease-out), left 0.3s var(--ease-out);
}

.site-nav-link:hover {
  color: var(--navy);
}

.site-nav-link:hover::after {
  width: 60%;
  left: 20%;
}

.site-nav-auth {
  display: flex;
  align-items: center;
  gap: 0.25rem;
  margin-left: 1rem;
  padding-left: 1rem;
  border-left: 1px solid rgba(15, 23, 41, 0.1);
}

.site-nav-greeting,
.site-nav-greeting-btn {
  color: var(--navy, #1e3a5f);
}

.site-nav-greeting-btn:hover {
  opacity: 0.8;
}

.site-nav-link-logout {
  color: var(--text-secondary, #52525b);
}

.site-nav-link-logout:hover {
  color: var(--navy);
}

.site-nav-link-login {
  color: var(--text-secondary, #52525b);
}

.site-nav-link-register {
  background: var(--sage);
  color: var(--navy) !important;
  padding: 0.5rem 1.25rem;
  border-radius: var(--radius-sm);
  font-weight: 600;
}

.site-nav-link-register::after {
  display: none;
}

.site-nav-link-register:hover {
  background: var(--sage-light);
  color: var(--navy) !important;
  transform: translateY(-1px);
  box-shadow: 0 4px 20px rgba(139, 168, 136, 0.4);
}

/* Mobile toggle button */
.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: 0.5rem;
  z-index: 1001;
  position: relative;
}

.nav-toggle-bar {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--navy, #1e3a5f);
  border-radius: 2px;
  transition: var(--transition-fast);
  transform-origin: center;
}

/* Mobile */
@media (max-width: 768px) {
  .nav-toggle {
    display: flex;
  }

  .site-nav-actions {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(15, 23, 41, 0.97);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    z-index: 999;
  }

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

  .site-nav-actions .site-nav-link {
    font-size: var(--fs-xl);
    padding: 0.75rem 1.5rem;
    color: var(--cream-light);
  }

  .site-nav-actions .site-nav-link::after {
    display: none;
  }

  .site-nav-auth {
    flex-direction: column;
    margin-left: 0;
    padding-left: 0;
    border-left: none;
    margin-top: 1.5rem;
    padding-top: 1.5rem;
    border-top: 1px solid rgba(139, 168, 136, 0.15);
    width: 80%;
    align-items: center;
  }

  .nav-toggle.active .nav-toggle-bar:nth-child(1) {
    transform: translateY(7px) rotate(45deg);
  }

  .nav-toggle.active .nav-toggle-bar:nth-child(2) {
    opacity: 0;
  }

  .nav-toggle.active .nav-toggle-bar:nth-child(3) {
    transform: translateY(-7px) rotate(-45deg);
  }
}