*{box-sizing:border-box;
}

body, html {
    height: 100%;
    margin: 0;
    font-family: Arial, Helvetica, sans-serif;
  }
  
  .hero-image {
    background-image: linear-gradient(rgba(0, 0, 0, 0.5), rgba(0, 0, 0, 0.5)), url("images/storm.jpg");
    height: 50%;
    background-position: center;
    background-repeat: no-repeat;
    background-size: cover;
    position: relative;
  }
  
  .hero-text {
    text-align: center;
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    color: white;       
  }