style.css

*{
    box-sizing: border-box;
  }

body {
    background: url(bgFood.jpg) no-repeat;
	-webkit-background-size: cover;
	background-size: cover;
    margin: 0;
    padding: 0;
    line-height: 1.5;
    font-size: 16px;
	font-family: 'Montserrat', sans-serif;
}
/* styling our header */
header   {
    background: #222;
    color: #FFF;
    padding: 20px 30px;
  }
  
  /* logo */
  #logo         {
    display: inline-block;
    color: #FFF;
    text-decoration: none;
    width: 49%;
  }
  #logo img    {
    width: 50px;
    border-radius: 3px;
    margin-right: 8px;
    vertical-align: middle;
  }
  #logo span   {
    display: inline-block;
  }
  
  /* main navigation */
  nav     {
    width: 50%;
    display: inline-block;
    text-align: right;
  }
  nav ul   {
    list-style: none;
    margin: 0;
  }
  nav ul li {
    display: inline-block;
  }
  nav ul li a    {
    color: #FFF;
    text-decoration: none;
    display: block;
    padding: 10px 15px;
    border-radius: 3px;
    transition: 0.3s ease all;
  }
  nav ul li a:hover   {
    background: #444;
  }

  .head_section {
      background: url(bgFood.jpg) no-repeat;
      -webkit-background-size: cover;
      background-repeat: no-repeat;
      background-size: cover;
      height: 100vh;
      position: relative;
  }
  
  .head_wrapper {
      color:white;
      position: absolute;
      top: 50%;
      left: 50%;
      transform: translate(-50%,-50%);
  }
  
  .head_wrapper h1 {
      font-size: 3.28rem;
      text-align: center;
  }
  .head_wrapper h2 {
    font-size: 2.0rem;
    text-align: center;
}
  
  .form_code {
      text-align: center;
  }
  
  .form_code .pin_code {
      display: block;
      width: 80%;
      margin-left: auto;
      margin-right: auto;
      border-radius: 2rem;
      padding: .6rem;
      border:none;
      outline:none;
  }
  .form_code ::placeholder{
    font-size: 1.4rem;
    text-align: center;
  }
  .form_code a {
    display: inline-block;
    color: rgb(5, 6, 97);
    border: 3px solid rgb(28, 6, 87);
    background-color: rgb(113, 203, 238);
    border-radius: 3px;
    padding: 15px 30px;
    margin-right: 20px;
    text-decoration: none;
    font-size: 28px;
  }

  .form_code a:hover{
  background: rgb(206, 21, 98);
  transform: translateX(-0.5rem);
  }  
  
  /*  Product Section */
  
  .products {
      width: 90%;
      height: 150%;
      margin-top: .3rem;
      margin-left: auto;
      margin-right: auto;
      background-color: rgb(230, 217, 217);
  }
  
.img-responsive {
    width: 376px;
    height: 280px;
  }
  
 .product_item1 {
      float: left;
      width: 31%;
      margin-left: .5rem;
      background-color: rgb(203, 218, 231);
  }
  .product_item2 {
    float: left;
    width: 31%;
    margin-left: .5rem;
    background-color: rgb(203, 218, 231);
}
.product_item3 {
  float: left;
  width: 31%;
  margin-left: .5rem;
  background-color: rgb(203, 218, 231);
}
.product_item4 {
    float: left;
    width: 31%;
    margin-left: .5rem;
    background-color: rgb(224, 198, 198);
}
.product_item5 {
  float: left;
  width: 31%;
  margin-left: .5rem;
  background-color: rgb(224, 198, 198);
}
.product_item6 {
  float: left;
  width: 376px;
  height: 522px;
  margin-left: .5rem;
  background-color: rgb(224, 198, 198);
}

/* For mobile phones: 
[class*="col-"] {
    width: 100%;
  }
  
  @media only screen and (min-width: 600px) {
    For tablets: 
    .col-s-1 {width: 8.33%;}
    .col-s-2 {width: 16.66%;}
    .col-s-3 {width: 25%;}
    .col-s-4 {width: 33.33%;}
    .col-s-5 {width: 41.66%;}
    .col-s-6 {width: 50%;}
    .col-s-7 {width: 58.33%;}
    .col-s-8 {width: 66.66%;}
    .col-s-9 {width: 75%;}
    .col-s-10 {width: 83.33%;}
    .col-s-11 {width: 91.66%;}
    .col-s-12 {width: 100%;}
  }
  @media only screen and (min-width: 768px) {
    For desktop: 
    .col-1 {width: 8.33%;}
    .col-2 {width: 16.66%;}
    .col-3 {width: 25%;}
    .col-4 {width: 33.33%;}
    .col-5 {width: 41.66%;}
    .col-6 {width: 50%;}
    .col-7 {width: 58.33%;}
    .col-8 {width: 66.66%;}
    .col-9 {width: 75%;}
    .col-10 {width: 83.33%;}
    .col-11 {width: 91.66%;}
    .col-12 {width: 100%;}
  }*/