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<link href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.5/css/bootstrap.min.css" rel="stylesheet" />

body {
  font-family: 'Open Sans', sans-serif;
}

a {
  text-decoration: none;
  color: inherit;
}

.contact-links .fa-4x {
  vertical-align: middle;
}

.navbar {
  background-color: rgba(255, 255, 255, .90)
}

.navbar-toggle {
  float: left;
  margin-left: 15px
}

.navbar-default .navbar-nav>li>a {
  font-weight: bold;
  color: #252525;
}

a:hover {
  color: #252525;
}

h1,
h4 {
  margin: 0;
  font-family: 'Nunito', sans-serif;
}

h4 {}

#logo {
  background-color: rgba(255, 255, 255, .93);
  border-radius: 5px;
  color: #252525;
  width: 350px;
  padding: 35px 0;
}

.social {
  padding-top: 35px;
  padding-left: 0px;
  color: rgb(0, 135, 154);
}

.social li {
  display: inline;
  padding: 20px
}

.container {
  width: 100%;
  margin: 0;
  padding: 0;
}

.header {
  margin: 0;
  padding-top: 200px;
  width: 100%;
  height: 600px;
  background: url("https://easycard.me/imgs/users/0/179/desktopbg_179.jpg") no-repeat;
  background-size: 100% 150%;
}

.about-me {
  
  padding: 75px 20px;
  background-color: rgba(0, 135, 154, .75);
  font-size: 1.15em;
}

.about-me img {
  max-height: 250px;
  border-radius: 50%;
  border: 7px solid #252525;
}

#bio {
  padding: 20px;
}

.content {
  max-width: 900px;
  margin: 0 auto;
}

.contact {
  padding: 2px 20px;
  
  background: url("https://res.cloudinary.com/dck40m3wf/image/upload/v1455475485/Portfolio/tweed.png");
}

.contact-links li,
.contact h4 {
  color: white;
}

.contact-links li {
  font-size: 1.25em;
  
}

.contact-links i{
   color: rgb(0, 135, 154);
}
.contact h1 {
  color: rgb(255, 255, 255);
}

#contact-me {
  padding-top: 75px;
  padding-bottom: 30px;
}

footer {
  text-align: center;
  color: #252525;
  height: 140px;
  background: rgb(255, 255, 255);
  padding-top: 50px
}

#footer-links li {
  display: inline;
  padding: 0px 40px;
  border-right: 1px solid white;
}

#footer-links li:nth-child(4) {
  border-right: none;
}
#footer-links li a{
 
}

@media only screen and (max-width: 770px) {
  .about-me img {
    display:block;
    margin: 0 auto;
  }
  .portfolio img {
    max-width: 150px;
    margin-top: 170px;
  }
  
  #have-chat {
    padding-top: 20px;
  }
  
  .contact-links {
    padding-top: 35px;
  }
  
  #footer-links li {
    padding: 0 15px;
    
  }
  
  
}

<script src="//cdnjs.cloudflare.com/ajax/libs/jquery/2.1.3/jquery.min.js"></script>
<script src="//maxcdn.bootstrapcdn.com/bootstrap/3.3.5/js/bootstrap.min.js"></script>

<nav class="navbar navbar-default navbar-fixed-top">
  <div class="container-fluid">
    <div class="navbar-header">
      <button type="button" class="navbar-toggle" data-toggle="collapse" data-target="#myNavbar">
        <span class="icon-bar"></span>
        <span class="icon-bar"></span>
        <span class="icon-bar"></span> 
      </button>
    </div>
    <div class="collapse navbar-collapse" id="myNavbar">
      <ul class="nav navbar-nav navbar-right">
        <li><a href="#home">Home</a></li>
        <li><a href="#about">About</a></li>
        <li><a href="#portfolio">Blog</a></li> 
        <li><a href="#contact-me">Contact</a></li> 
      </ul>
    </div>
  </div>
</nav><div class="container">
  <div id="home" class="header">
    <div class="text-center center-block" id="logo">
      <h1>HARUN PEHLİVAN</h1>
      <h4>INFORMATION TECHNOLOGY FOUNDER CEO BLOGGER INITIATIVE RESEARCH AND DEVELOPMENT</h4>
      <ul class="social">
        <li><a href="https://twitter.com/HTERCUMANP" target="_blank"><i class="fa fa-4x fa-twitter"></i></a></li>
        <li><a href="https://github.com/harunpehlivan" target="_blank"><i class="fa fa-4x fa-github"></i></a></li>
        <li><a href="https://www.linkedin.com/in/harun-pehlivan-0aa34252" target="_blank"><i class="fa fa-4x fa-linkedin-square"></i></a></li>
      </ul>
    </div>
  </div>
  <div class="about-me">
    <div id="about" class="content">
    <div class="row">
      <div class="col-sm-4"><img src="https://pbs.twimg.com/profile_images/670516115471212544/IQR1JSyu.jpg" alt="" /></div>
      <div class="col-sm-8"><span id="bio"><p><a href="https://harunpehlivantebimtebitagem.site123.me/" target="_blank" itemprop="jobTitle">HARUN PEHLİVAN INFORMATION TECHNOLOGY GROUP</a></p><p><a href="https://shortcutz.link/harunpehlivan" rel="noopener noreferrer" target="_blank"><strong>INFORMATION TECHNOLOGY FOUNDER,CEO BLOGGER</a></p></span></div>
    </div>
      </div>
  </div>
  <div id="contact-me" class="contact">
    <div class="content">
    <div class="row">
      <div id="contact-me" class="col-sm-6">
        <h1>Contact Me at:</h1>
      </div>
      <div class="col-sm-6">
        <ul class="contact-links">
        <li><a href="https://twitter.com/HTERCUMANP" target="_blank"><i class="fa fa-fw fa-4x fa-twitter"></i></a> Twitter</li>
        <li><a href="https://github.com/harunpehlivan"  target="_blank"><i class="fa fa-fw fa-4x fa-github"></i></a> Github</li>
        <li><a href="https://www.linkedin.com/in/harun-pehlivan-0aa34252"  target="_blank"><i class="fa fa-fw fa-4x fa-linkedin-square"></i></a> LinkedIn</li>
      </ul>
      </div>
    </div>
    </div>
  </div>
  <footer>
    <ul id="footer-links">
      <li><a href="#home" class="btn btn-default">Home</a></li>
      <li><a href="#about" class="btn btn-default">About</a></li>
      <li><a href="http://harunpehlivan.blogspot.com/"  class="btn btn-default">Blog</a></li>
      <li><a href="https://harunpehlivanmab.glitch.me/"  class="btn btn-default">Contact</a></li>
    </ul>
    <p>Copyright 1984 HARUN PEHLİVAN INFORMATION TECHNOLOGY GROUP</p>
  </footer>
</div></div>