body { line-height: 1; margin: auto; padding: auto; }
html, body { width: 100%; height: 100%;  }
a:link { text-decoration: none; }
.intro { position: absolute; left: 0; top:20%; padding: 0 20px;  width: 100%;  text-align: center; }
  h1 {
    color: #fff;
    text-transform: uppercase;
    font-size: 100px;
    font-weight: 700;
    letter-spacing: 0.015em;
  }
  h1::after {
    content: '';
    width: 200px;
    display: block;
    background: #b20000;
    height: 6px;
    margin: 30px auto;
    line-height: 1.1;
  }
  .btn {
    display: inline-block;
    padding: 15px 30px;
    border: 2px solid #fff;
    text-transform: uppercase;
    letter-spacing: 0.015em;
    font-size: 18px;
    font-weight: 600;
    line-height: 1;
    color: #fff;
    text-decoration: none;
    -webkit-transition: all 0.4s;
       -moz-transition: all 0.4s;
         -o-transition: all 0.4s;
            transition: all 0.4s;
  }
  .btn:hover {
    color: #000;
    border-color: #fff;
    background-color: #607d8b;
  }
  h2 {
    color: #b20000;
    text-transform: uppercase;
    font-size: 35px;
    font-weight: 700;
    letter-spacing: 0.015em;
  }
  
  @media only screen and (max-width: 1000px) {
    h1 {
      font-size: 70px;
    }
  }
  
  @media only screen and (max-width: 800px) {
    h1 {
      font-size: 48px;
    }
    h1::after {
      height: 8px;
    }
  }
  @media only screen and (max-width: 550px) {
    .btn {
    display: inline-block;
    padding: 5px 15px;
    border: 2px solid #fff;
    text-transform: uppercase;
    letter-spacing: 0.009em;
    font-size: 13px;
    font-weight: 400;
    line-height: 1;
    color: #fff;
    text-decoration: none;
    -webkit-transition: all 0.4s;
       -moz-transition: all 0.4s;
         -o-transition: all 0.4s;
            transition: all 0.4s;
    }
  }
  
  @media only screen and (max-width: 430px) {
    .btn {
    display: inline-block;
    padding: 5px 10px;
    border: 1px solid #fff;
    text-transform: uppercase;
    letter-spacing: 0.005em;
    font-size: 10px;
    font-weight: 400;
    line-height: 1;
    color: #fff;
    text-decoration: none;
    -webkit-transition: all 0.4s;
       -moz-transition: all 0.4s;
         -o-transition: all 0.4s;
            transition: all 0.4s;
    }
  }
  
  @media only screen and (max-width: 568px) {
    .intro {
      padding: 0 10px;
    }
    h1 {
      font-size: 30px;
    }
    h1::after {
      height: 6px;
    }
    p {
      font-size: 18px;
    }
    .btn {
      font-size: 16px;
    }
  }
  
  @media only screen and (max-width: 320px) {
    h1 {
      font-size: 28px;
    }
    h1::after {
      height: 4px;
    }
  }