body {
    margin: 0;
    padding: 0;
    background: url(../img/smwallpaper.jpg) no-repeat fixed center;
    background-size: cover;
    font-family: sans-serif;
  }
  
  .box {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 25rem;
    padding: 2.5rem;
    box-sizing: border-box;
    background: rgba(0, 0, 0, 0.6);
    border-radius: 0.625rem;
  }
  
  .box h2 {
    margin: 0 0 1.875rem;
    padding: 0;
    color: #fff;
    text-align: center;
  }
  
  .box .inputBox {
    position: relative;
  }
  
  .box .inputBox input {
    width: 100%;
    padding: 0.625rem 0;
    font-size: 1rem;
    color: #fff;
    letter-spacing: 0.062rem;
    margin-bottom: 1.875rem;
    border: none;
    border-bottom: 0.065rem solid #fff;
    outline: none;
    background: transparent;
  }
  
  .box .inputBox label {
    position: absolute;
    top: 0;
    left: 0;
    padding: 0.625rem 0;
    font-size: 1rem;
    color: #fff;
    pointer-events: none;
    transition: 0.5s;
  }
  
  .box .inputBox input:focus ~ label,
  .box .inputBox input:valid ~ label,
  .box .inputBox input:not([value=""]) ~ label {
    top: -1.125rem;
    left: 0;
    color: #03a9f4;
    font-size: 0.75rem;
  }
  
  .box input[type="submit"] {
    border: none;
    outline: none;
    color: #fff;
    background-color: #fd0606;
    padding: 0.625rem 1.25rem;
    cursor: pointer;
    border-radius: 0.312rem;
    font-size: 1rem;
  }
  
  .box input[type="submit"]:hover {
    background-color: #1cb1f5;
  }