nav {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--bg-card);
  border-bottom: 1px solid var(--border);
  padding: 0 24px;
  height: 64px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-logo {
  font-size: 20px;
  font-weight: 600;
  color: var(--accent);
  letter-spacing: -0.5px;
}

.nav-logo span {
  color: var(--text-primary);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 12px;
}

.nav-link {
  font-size: 14px;
  font-weight: 500;
  color: var(--text-secondary);
  padding: 6px 12px;
  border-radius: var(--radius-sm);
  transition: color 0.2s, background 0.2s;
}

.nav-link:hover {
  color: var(--text-primary);
  background: var(--bg-secondary);
}

.nav-avatar {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: var(--accent);
  color: #ffffff;
  font-size: 14px;
  font-weight: 600;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
}

.theme-toggle {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  color: var(--text-secondary);
  font-size: 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background 0.2s;
}

.theme-toggle:hover {
  background: var(--border);
}

.nav-guest {
  display: flex;
  align-items: center;
  gap: 8px;
}

.nav-user {
  display: flex;
  align-items: center;
  gap: 12px;
}

.dropdown {
  position: relative;
}

.dropdown-menu {
  display: none;
  position: absolute;
  top: 44px;
  right: 0;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  box-shadow: var(--card-shadow);
  min-width: 160px;
  overflow: hidden;
  z-index: 200;
}

.dropdown-menu.open {
  display: block;
}

.dropdown-item {
  display: block;
  padding: 10px 16px;
  font-size: 13px;
  color: var(--text-primary);
  transition: background 0.15s;
}

.dropdown-item:hover {
  background: var(--bg-secondary);
}

.dropdown-item.danger {
  color: var(--danger);
}