* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
  }
  
  html,
  body {
    font-family: Arial, Helvetica, sans-serif;
  }
  
  #app {
    width: 400px;
    height: 100vh;
    margin: auto;
    text-align: left;
    display: flex;
    flex-direction: column;
    justify-content: flex-start;
    align-items: left;
  }
  
  h1,
  h3 {
    margin-bottom: 1rem;
    font-weight: normal;
  }

  input {
    margin: .2rem 0;
  }
  
  img {
    width: 200px;
    height: 200px;
    border-radius: 50%;
    border: 5px #333 solid;
    margin-bottom: 1rem;
  }

  .center-form{
    margin-top: 1rem;
    margin-bottom: 1rem;
  }
  
  .number {
    margin: .5rem 0;
    color: orange;
  }
  
  .male {
    border-color: steelblue;
    background-color: steelblue;
  }
  
  .female {
    border-color: pink;
    background-color: pink;
    color: #333;
  }

  .ok {
    color: green;
  }

  .error {
    color: red;
  }
  
  button {
    cursor: pointer;
    display: inline-block;
    background: #333;
    color: white;
    font-size: 18px;
    border: 0;
    padding: 1rem 1.5rem;
  }
  
  button:focus {
    outline: none;
  }
  
  button:hover {
    transform: scale(0.98);
  }