.base_div{
  margin: auto;
  width: 90%;
  border: 3px;
  padding: 10px;
  background-color: AliceBlue;
}

.header_div {
  /*position: fixed;*/
  width: 95%;
  top: 0;
  margin-bottom: 100;
  background-color: black;
}

.header_nav{
  display: flex;
  flex-flow: row wrap;
  justify-content: space-between;
  align-items: center;
  background: black;
  margin: 0;
  width: 100%;
  height: 70px;
}

.header_title{
  color: white;
  padding: 0px 100px;
  margin-right: auto;
}

.nav_bar{
  display: flex;
  flex-flow: row wrap;
  justify-content: flex-end;
  list-style: none;
  background: black;
  margin = 0;
}

.nav_bar > li {               /* style li inside nav */
  padding: 20px 20px;
}

.nav_bar > li:hover {               /* style li inside nav */
  padding: 20px 20px;
  background-color: grey;
}

.nav_bar > li > a {            /* style li elements having link */
  color: white;
  text-decoration: none;       /* To remove underline */
}

.body_div{
  margin: auto;
  width: 100%;
}

.section_div{
  margin: auto;
  width: 90%;
  padding-top: 20px;
}

.Intro_text{
  position: relative;
  align: left;
  display: inline-block;
  width: 70%;
  height: 200px;
  padding: 20px 20px 20px 20px;
}

.section_header{
  margin: auto;
  width: 100%;
  height: 30px;
  background-color: black;
}

.section_header > h3 {
  color: white;
  padding: 5px 50px;
}

.Softwares_box{
  background-color: grey;
  width: 150px;
  height: 150px;
  margin: 10px;
  padding: 2px;
  text-align: center;
}

.Softwares_flexbox {
  display: flex;
  flex-flow: row wrap;
  justify-content: space-evenly;

  padding: 0px;
  margin: 0px;
  list-style: none;
}

.Intro_flexbox {
  display: flex;
  flex-flow: row wrap;
  justify-content: space-evenly;
  list-style: none;
}

.fa {
  padding: 15px;
  font-size: 30px;
  width: 20px;
  text-align: center;
  text-decoration: none;
  margin: 5px 2px;
  border-radius: 30%;
}
.fa:hover {
    opacity: 0.7;
}
.fa-linkedin {
  background: #007bb5;
  color: white;
}
.fa-twitter {
  background: #55ACEE;
  color: white;
}

/*grid and flex-box */