html { scroll-behavior: smooth; }
    nav a.active { 
      color: #4f46e5; 
      font-weight: 600;
      text-decoration: underline;
      text-underline-offset: 4px;
    }
    svg path, svg rect, svg line, svg circle { stroke-linecap: round; stroke-linejoin: round; }
    .lang-switcher {
      display: flex;
      align-items: center;
      gap: 8px;
      padding: 0 12px;
      margin-left: 16px;
      border-left: 1px solid #e5e7eb;
    }
    .lang-switcher a {
      padding: 4px 8px;
      font-size: 14px;
      font-weight: 500;
      color: #6b7280;
      transition: all 0.2s;
    }
    .lang-switcher a:hover {
      color: #4f46e5;
    }
    .lang-switcher a.active-lang {
      background: #4f46e5;
      color: white;
    }