* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    transition: all 0.5s ease;
  }
  
  ::-moz-selection {
    color: #fff;
    background: #007AFF;
  }
  
  ::selection {
    color: #fff;
    background: #007AFF;
  }
  
  body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif, "Apple Color Emoji", "Segoe UI Emoji", "Segoe UI Symbol";
    font-size: 16px;
    margin: auto;
  }
  
  
  p {
    font-size: 1rem;
    line-height: 1.5;
  }
  
  header {
    display: flex;
    flex-direction: row;
    align-items: center;
    justify-content: center;
    padding: 0 20px;
    margin-top: 40px;
  }
  
  header.sub-page {
    padding: 40px 20px;
    padding-top: 40px;
    margin-top: 0;
    background: #f9f9f9;
  }
  
  header .header-icon {
    display: block;
  }
  
  .center { 
    text-align: center;
  }
  
  .main .etc {
    text-align: center;
    font-style: italic;
  }
  
  .support {
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    padding: 20px;
  }
  
  .support p {
    max-width: 400px;
    background: #F4F3F9;
    padding: 40px;
    border-radius: 8px;
  }
  
  .support p a {
    color: #007AFF;
  }
  
  .support p a:hover {
    color: #6C5EFF;
  }
  
  footer {
    margin: 50px 0;
    text-align: center;
    clear: both;
  }
  
  footer a {
    color: #A9A9A9;
    text-decoration: none;
    font-weight: 500;
  }