body {
    font-family: 'Segoe UI', Arial, sans-serif;
    margin: 0;
    background: #f7f8fa;
    color: #222;
  }
  
  header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 100;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 16px 24px 16px 24px;
    background: #fff;
    box-sizing: border-box;
    box-shadow: 0 2px 8px rgba(0,0,0,0.03);
  }
  
  .logo {
    font-size: 2rem;
    font-weight: bold;
    color: #2a7cff;
    white-space: nowrap;
  }

  .logo a {
    color: #2a7cff;
    text-decoration: none;
  }

  .lang-switch {
    display: flex;
    gap: 8px;
    min-width: 80px;
  }
  
  .lang-switch button {
    background: none;
    border: none;
    font-size: 1rem;
    cursor: pointer;
    color: #888;
    padding: 4px 8px;
    border-radius: 4px;
    transition: background 0.2s;
    min-width: 36px;
  }
  .lang-switch button.active,
  .lang-switch button:hover {
    background: #e6f0ff;
    color: #2a7cff;
  }