html
{
    position: relative;
}
h1, h2, h3, h4, h5{
    color:green;
} 
header.masthead {
    margin-bottom: 50px;
    background: no-repeat center center;
    background-color: #868e96;
    background-attachment: scroll;
    position: relative;
    background-size: cover;
  }
  
  header.masthead .overlay {
    position: absolute;
    top: 0;
    left: 0;
    height: 100%;
    width: 100%;
    background-color: #212529;
    opacity: 0.5;
  }
  
  header.masthead .page-heading,
  header.masthead .post-heading,
  header.masthead .site-heading {
    padding: 200px 0 150px;
    color: white;
  }
  
  @media only screen and (min-width: 768px) {
    header.masthead .page-heading,
    header.masthead .post-heading,
    header.masthead .site-heading {
      padding: 200px 0;
    }
  }
  
  header.masthead .page-heading,
  header.masthead .site-heading {
    text-align: center;
  }
  
  header.masthead .page-heading h1,
  header.masthead .site-heading h1 {
    font-size: 50px;
    margin-top: 0;
  }
  
  header.masthead .page-heading .subheading,
  header.masthead .site-heading .subheading {
    font-size: 24px;
    font-weight: 300;
    line-height: 1.1;
    display: block;
    margin: 10px 0 0;
    font-family: 'Open Sans', 'Helvetica Neue', Helvetica, Arial, sans-serif;
  }
  
  @media only screen and (min-width: 768px) {
    header.masthead .page-heading h1,
    header.masthead .site-heading h1 {
      font-size: 80px;
    }
  }
  
  header.masthead .post-heading h1 {
    font-size: 35px;
  }
  
  header.masthead .post-heading .meta,
  header.masthead .post-heading .subheading {
    line-height: 1.1;
    display: block;
  }
  
  header.masthead .post-heading .subheading {
    font-size: 24px;
    font-weight: 600;
    margin: 10px 0 30px;
    font-family: 'Open Sans', 'Helvetica Neue', Helvetica, Arial, sans-serif;
  }
  
  header.masthead .post-heading .meta {
    font-size: 20px;
    font-weight: 300;
    font-style: italic;
    font-family: 'Lora', 'Times New Roman', serif;
  }
  
  header.masthead .post-heading .meta a {
    color: #fff;
  }
  
  @media only screen and (min-width: 768px) {
    header.masthead .post-heading h1 {
      font-size: 55px;
    }
    header.masthead .post-heading .subheading {
      font-size: 30px;
    }
  }
  
  .preloader {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 99;
    background-color: #fff;
  }
  .preloader .loading {
    position: absolute;
    left: 50%;
    top: 50%;
    transform: translate(-50%,-50%);
    font: 14px arial;
  }