/* CycleGuardian global navigation polish.
   Updated: 2026-04-27 09:12 UTC — modernized desktop/mobile nav, grouped dropdown, and robust open/close transitions. */

.site-header-modern {
  isolation: isolate;
}

.nav-shell-modern {
  min-height: 76px;
}

.brand-modern {
  flex: 0 0 auto;
  min-width: 0;
  text-decoration: none;
}

.brand-modern:hover {
  text-decoration: none;
}

.site-nav-primary {
  display: none;
  align-items: center;
  gap: 0.28rem;
  padding: 0.32rem;
  border: 1px solid var(--cn-border);
  border-radius: 999px;
  background: color-mix(in srgb, var(--cn-surface) 88%, transparent);
  box-shadow: var(--cn-shadow);
}

.site-nav-primary a {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.35rem;
  min-height: 40px;
  padding: 0.42rem 0.78rem;
  border-radius: 999px;
  color: var(--cn-text);
  font-weight: 800;
  font-size: 0.92rem;
  text-decoration: none;
  white-space: nowrap;
}

.nav-link-icon {
  font-size: 0.9em;
  line-height: 1;
}

.site-nav-primary a:hover,
.site-nav-primary a:focus-visible,
.site-nav-primary a.is-active,
.site-nav-primary a[aria-current="page"] {
  text-decoration: none;
}

.site-nav-primary a:hover,
.site-nav-primary a:focus-visible {
  background: var(--cn-surface-soft);
  color: var(--cn-primary-strong);
}

.site-nav-primary a:focus-visible,
.site-nav-modern .nav-menu-section a:focus-visible,
.site-nav-modern .install-app-btn:focus-visible,
.site-nav-modern .nav-logout-btn:focus-visible,
.mobile-bottom-nav-modern a:focus-visible {
  outline: 2px solid color-mix(in srgb, var(--cn-primary) 65%, #fff);
  outline-offset: 2px;
}

.site-nav-primary a.is-active,
.site-nav-primary a[aria-current="page"] {
  background: linear-gradient(180deg, var(--cn-primary) 0%, var(--cn-primary-strong) 100%);
  color: #fff;
  box-shadow: 0 7px 16px rgba(26, 133, 74, 0.16);
}

.nav-header-actions-modern {
  flex: 0 0 auto;
}

.site-nav-modern {
  display: flex;
  flex-direction: column;
  align-items: stretch;
  gap: 0.7rem;
  padding: 0.85rem;
  width: min(420px, calc(100vw - 1rem));
  max-height: min(calc(100dvh - 84px), 640px);
  overflow-y: auto;
  border-radius: 22px;
  border: 1px solid var(--cn-border);
  background: color-mix(in srgb, var(--cn-surface) 95%, transparent);
  box-shadow: 0 20px 44px rgba(25, 35, 25, 0.16);
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  transform: translateY(-8px) scale(0.98);
  transform-origin: top right;
  transition: opacity 180ms ease, transform 180ms ease, visibility 180ms ease;
}

.site-nav-modern.open {
  opacity: 1;
  visibility: visible;
  pointer-events: auto;
  transform: translateY(0) scale(1);
}

.nav-menu-section {
  display: grid;
  gap: 0.35rem;
  padding: 0.55rem;
  border: 1px solid var(--cn-border);
  border-radius: 18px;
  background: var(--cn-surface);
}

.nav-menu-heading {
  display: inline-flex;
  align-items: center;
  min-height: 24px;
  padding: 0 0.18rem;
  color: var(--cn-muted);
  font-size: 0.76rem;
  font-weight: 900;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.site-nav-modern .nav-menu-section a,
.site-nav-modern .install-app-btn,
.site-nav-modern .nav-logout-btn {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  min-height: 44px;
  border-radius: 14px;
  padding: 0.62rem 0.75rem;
  color: var(--cn-text);
  background: var(--cn-surface-soft);
  border: 1px solid transparent;
  font-weight: 800;
  text-decoration: none;
  white-space: normal;
}

.site-nav-modern .nav-menu-section a::after {
  content: "›";
  color: var(--cn-muted);
  font-weight: 900;
  margin-left: 0.8rem;
}

.site-nav-modern .nav-menu-section a:hover,
.site-nav-modern .nav-menu-section a:focus-visible,
.site-nav-modern .install-app-btn:hover,
.site-nav-modern .install-app-btn:focus-visible,
.site-nav-modern .nav-logout-btn:hover,
.site-nav-modern .nav-logout-btn:focus-visible {
  border-color: color-mix(in srgb, var(--cn-primary) 40%, transparent);
  background: color-mix(in srgb, var(--cn-primary) 14%, var(--cn-surface-soft));
  color: var(--cn-primary-strong);
  text-decoration: none;
}

.nav-menu-section-account {
  background: linear-gradient(180deg, color-mix(in srgb, var(--cn-primary) 14%, transparent), var(--cn-surface));
}

.nav-logout-form {
  display: block;
  width: 100%;
}

.site-nav-modern .nav-logout-btn {
  justify-content: center;
  color: #fff;
  background: linear-gradient(180deg, var(--cn-primary) 0%, var(--cn-primary-strong) 100%);
}

.mobile-bottom-nav-modern {
  position: fixed;
  left: max(0.75rem, env(safe-area-inset-left));
  right: max(0.75rem, env(safe-area-inset-right));
  bottom: max(0.75rem, env(safe-area-inset-bottom));
  z-index: 4900;
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 0.28rem;
  padding: 0.42rem;
  border: 1px solid var(--cn-border);
  border-radius: 24px;
  background: color-mix(in srgb, var(--cn-surface) 95%, transparent);
  box-shadow: 0 18px 36px rgba(25, 35, 25, 0.16);
  backdrop-filter: blur(16px);
}

.mobile-bottom-nav-modern a {
  display: inline-flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 0.12rem;
  min-height: 48px;
  padding: 0.34rem 0.24rem;
  border-radius: 18px;
  color: var(--cn-text);
  font-size: 0.76rem;
  font-weight: 900;
  text-decoration: none;
  white-space: nowrap;
}

.mobile-bottom-nav-modern a:hover,
.mobile-bottom-nav-modern a:focus-visible,
.mobile-bottom-nav-modern a.is-active {
  background: var(--cn-surface-soft);
  color: var(--cn-primary-strong);
  text-decoration: none;
}

.mobile-bottom-nav-modern .mobile-record-link {
  color: #fff;
  background: linear-gradient(180deg, var(--cn-primary) 0%, var(--cn-primary-strong) 100%);
  box-shadow: 0 8px 18px rgba(26, 133, 74, 0.2);
}

.mobile-bottom-nav-modern .mobile-record-link.is-active {
  filter: brightness(1.05);
}

body:has(.mobile-bottom-nav-modern) .page-shell {
  padding-bottom: calc(6.7rem + env(safe-area-inset-bottom));
}

@media (min-width: 900px) {
  .site-nav-primary {
    display: inline-flex;
  }

  .mobile-bottom-nav-modern {
    display: none;
  }

  body:has(.mobile-bottom-nav-modern) .page-shell {
    padding-bottom: clamp(1.4rem, 4vw, 2rem);
  }
}

@media (max-width: 640px) {
  .nav-shell-modern {
    gap: 0.55rem;
  }

  .brand-modern img {
    height: 34px;
    max-width: 152px;
  }

  .theme-toggle-label {
    display: none;
  }

  .theme-toggle {
    min-width: 76px;
    max-width: 82px;
  }

  .nav-header-actions-modern {
    gap: 0.35rem;
    padding: 0.24rem;
  }

  .site-nav-modern {
    position: fixed;
    top: 76px;
    left: 0.5rem;
    right: 0.5rem;
    width: auto;
    max-height: calc(100dvh - 92px - env(safe-area-inset-bottom));
  }
}

@media (max-width: 420px) {
  .nav-bell-link {
    width: 40px;
    height: 40px;
  }

  .theme-toggle {
    display: none;
  }

  .mobile-bottom-nav-modern a {
    font-size: 0.72rem;
  }
}