HTMLify

* {
    box-sizing: border-box;
  }
body {
   
    font-family: Arial, Helvetica, sans-serif;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    height: 100vh;
    margin: 0;
    padding: 20px;
    background-image: linear-gradient(rgb(42, 105, 177),rgb(67, 207, 67) );
  }
  
  h1 {
    color:blanchedalmond;
    text-align: center;
  }
  h3{
    text-align: center;
  }
  
  p {
    text-align: center;
  }

  .main-box{
    border:12px solid rgb(56, 27, 187);
    background-color: #ff3399; 
    border-radius: 25px;
    padding:40px;

  }
  .second-box{
    border:2px solid ;
    background-color:#ff99cc;
    border-radius:20px;
    padding:10px;
  }
  
  .currency {
    padding: 40px 0;
    display: flex;
    align-items: center;
    justify-content: space-between;
  }
  
  .currency select {
    padding: 10px 20px 10px 10px;
    
    appearance: none;
    border: 1px solid #dedede;
    font-size: 16px;
    background: transparent;
    background-image: url('data:image/svg+xml;charset=US-ASCII,%3Csvg%20xmlns%3D%22http%3A%2F%2Fwww.w3.org%2F2000%2Fsvg%22%20width%3D%22292.4%22%20height%3D%22292.4%22%3E%3Cpath%20fill%3D%22%20000002%22%20d%3D%22M287%2069.4a17.6%2017.6%200%200%200-13-5.4H18.4c-5%200-9.3%201.8-12.9%205.4A17.6%2017.6%200%200%200%200%2082.2c0%205%201.8%209.3%205.4%2012.9l128%20127.9c3.6%203.6%207.8%205.4%2012.8%205.4s9.2-1.8%2012.8-5.4L287%2095c3.5-3.5%205.4-7.8%205.4-12.8%200-5-1.9-9.2-5.5-12.8z%22%2F%3E%3C%2Fsvg%3E');
    background-position: right 10px top 50%, 0, 0;
    background-size: 12px auto, 100%;
    background-repeat: no-repeat;
  }
  
  .currency input {
    border:0px;
    background: transparent;
    font-size: 30px;
    text-align: right;
  }
  
  
  
  .exchange-rate {
    color:aliceblue;
    font-size: 14px;
    padding: 0 10px;
  }
  
  select:focus,
  input:focus,
  button:focus {
    outline: 0;
  }

  .swap {
    text-align: end;
  }

  .swap button {
    background-color:#ff99cc;
    border: 1px solid #dedede;
    color: white;
  }

  .swap button:active {
    background-color: #ffc1e0;
  }

  .swap-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    align-items: baseline;
  }