*{
    box-sizing: border-box;
  }
  :root {
    --font1: Verdana, Tahoma;
  }
  body {
    width: 100%;
    height: 100vh;
    background-color: rgb(0, 255, 255);
  }
  h1 {
    text-align: center;
    font-family: var(--font1);
    font-size: 45px;
  }
  h3 {
    margin: 0;
    position: relative;
    text-align: center;
    bottom: 30px;
    font-family: var(--font1);
    font-size: 18px;
  }
  #text-input {
    position: relative;
    padding: 10px;
    width: 300px;
  }
  #check-btn {
    position: relative;
    padding: 10px;
    width: 90px;
    border-radius: 9px;
    font-family: var(--font1);
    background-color: rgb(46, 103, 230);
    color: white;
  }
  .checker {
    background-color: rgb(165, 230, 46);
    position: relative;
    width: 500px;
    height: 180px;
    margin-left: auto;
    margin-right: auto;
    padding: 50px;
    border-radius: 9px;
  }
  .definition {
    background-color: rgb(230, 76, 46);
    position: relative;
    width: 400px;
    height: 205px;
    margin-left: auto;
    margin-right: auto;
    padding: 50px;
    border-radius: 9px;
    top: 20px;
  }
  h4 {
    text-align: center;
    position: relative;
    bottom: 50px;
    font-family: var(--font1);
    font-size: 1,2rem;
  }
  #result {
    text-align: center;
    font-family: var(--font1);
    font-size: 25px;
    position: relative;
    bottom: 12px;
  }
  #result strong {
    font-weight: bold;
  }