style.css

 @import url('https://fonts.googleapis.com/css2?family=Bebas+Neue&display=swap');

html {
    box-sizing: border-box;
  }
  
  body {
    margin: 0;
    min-height: 100vh;
    background-color: #232323;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='40' height='40' viewBox='0 0 40 40'%3E%3Cg fill-rule='evenodd'%3E%3Cg fill='%238e8e8e' fill-opacity='0.4'%3E%3Cpath d='M0 38.59l2.83-2.83 1.41 1.41L1.41 40H0v-1.41zM0 1.4l2.83 2.83 1.41-1.41L1.41 0H0v1.41zM38.59 40l-2.83-2.83 1.41-1.41L40 38.59V40h-1.41zM40 1.41l-2.83 2.83-1.41-1.41L38.59 0H40v1.41zM20 18.6l2.83-2.83 1.41 1.41L21.41 20l2.83 2.83-1.41 1.41L20 21.41l-2.83 2.83-1.41-1.41L18.59 20l-2.83-2.83 1.41-1.41L20 18.59z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
    font-family: 'Bebas Neue', sans-serif;
  }

  h1{
    text-align: center;
    margin: 25px 0 15px 0 ;
    letter-spacing: 5px;
    font-size: 40px;
    color: whitesmoke;
  }

  /* loader */

  .loader{
    position: fixed;
    top: 0;
    bottom: 0;
    left: 0;
    right: 0;
    background: rgba(255, 255, 255, 0.8);
  }

  .loader img{
    position: fixed;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
  }

  /* image container */

  .image-container{
    margin: 10px 30%;
  }

  .image-container img{
    width: 100%;
    margin-top: 5px;
  }

  /* media query: large smartphone */
  @media screen  and (max-width:600px){
    h1{
      font-size: 20px;
    }

    .image-container{
      margin: 10px;
    }
  }