.app-nav-header {
  position: sticky;
  top: 0;
  z-index: 1030;
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border-color, #e9ecef);
  margin-bottom: 0;
}

.app-nav {
  --app-nav-height: 3.25rem;
  min-height: var(--app-nav-height);
  padding-top: 0.35rem;
  padding-bottom: 0.35rem;
}

.app-nav-brand {
  align-items: center;
  color: var(--text-primary, #1a1a1a) !important;
  display: inline-flex;
  font-size: 1.125rem;
  font-weight: 700;
  gap: 0.45rem;
  letter-spacing: -0.02em;
}

.app-nav-brand i {
  color: var(--primary-color, #2e5bff);
  font-size: 1.35rem;
}

.app-nav-links .nav-link {
  align-items: center;
  border-radius: 999px;
  color: var(--text-secondary, #4a4a4a);
  display: inline-flex;
  font-size: 0.9375rem;
  font-weight: 600;
  gap: 0.35rem;
  padding: 0.45rem 1rem;
  transition: background-color 0.15s ease, color 0.15s ease;
  white-space: nowrap;
}

@media (min-width: 992px) {
  .app-nav-links {
    column-gap: 0.625rem;
    row-gap: 0.25rem;
  }

  .app-nav-links .nav-link {
    padding: 0.45rem 1.05rem;
  }
}

.app-nav-links .nav-link:hover {
  background: rgba(46, 91, 255, 0.08);
  color: var(--primary-color, #2e5bff);
}

.app-nav-links .nav-link.active {
  background: rgba(46, 91, 255, 0.12);
  color: var(--primary-color, #2e5bff);
}

.app-nav-badge {
  border-radius: 999px;
  font-size: 0.625rem;
  font-weight: 800;
  letter-spacing: 0.04em;
  line-height: 1;
  padding: 0.2rem 0.4rem;
  text-transform: uppercase;
}

.app-nav-badge-free {
  background: #dcfce7;
  color: #166534;
}

.app-nav-badge-premium {
  background: #ede9fe;
  color: #5b21b6;
}

.app-nav-actions {
  align-items: center;
  gap: 0.5rem;
}

.app-nav-account {
  align-items: center;
  display: inline-flex !important;
  gap: 0.45rem;
  max-width: 12rem;
}

.app-nav-account-label {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.app-nav-avatar,
.app-nav-avatar-fallback {
  border-radius: 50%;
  flex-shrink: 0;
  height: 28px;
  object-fit: cover;
  width: 28px;
}

.app-nav-avatar-fallback {
  align-items: center;
  background: rgba(46, 91, 255, 0.12);
  color: var(--primary-color, #2e5bff);
  display: inline-flex;
  justify-content: center;
}

.app-nav-admin {
  font-size: 0.875rem;
}

.app-nav-dropdown {
  border: 1px solid var(--border-color, #e9ecef);
  border-radius: 12px;
  box-shadow: 0 12px 32px rgba(15, 23, 42, 0.12);
  padding: 0.35rem;
}

.app-nav-dropdown .dropdown-item {
  border-radius: 8px;
  font-size: 0.875rem;
  font-weight: 500;
}

.app-main {
  min-height: calc(100vh - 4rem);
}

.app-nav-signup,
.app-nav-login {
  border-radius: 999px !important;
  font-weight: 600;
  padding-left: 1rem !important;
  padding-right: 1rem !important;
}

@media (max-width: 991.98px) {
  .app-nav {
    padding-left: 0.25rem;
    padding-right: 0.25rem;
  }

  .app-nav .navbar-collapse {
    background: rgba(255, 255, 255, 0.98);
    border: 1px solid var(--border-color, #e9ecef);
    border-radius: 18px;
    box-shadow: 0 16px 42px rgba(15, 23, 42, 0.12);
    margin-top: 0.75rem;
    padding: 0.75rem;
  }

  .app-nav-links {
    gap: 0.15rem;
    padding-top: 0.5rem;
  }

  .app-nav-links .nav-link {
    justify-content: flex-start;
    width: 100%;
  }

  .app-nav-actions {
    border-top: 1px solid var(--border-color, #e9ecef);
    flex-direction: row;
    padding-top: 0.75rem;
    width: 100%;
  }

  .app-nav-account-label {
    max-width: 10rem;
  }
}

@media (max-width: 575.98px) {
  .app-nav-brand {
    font-size: 1rem;
    max-width: calc(100vw - 5.5rem);
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
  }

  .app-nav-actions {
    align-items: stretch;
    flex-direction: column;
  }

  .app-nav-signup,
  .app-nav-login,
  .app-nav-account {
    justify-content: center;
    width: 100%;
  }
}