HTML/CSS - A Beautiful Landing Page Online Editor and JavaScript Compiler

html

<!DOCTYPE html>
<html lang="en">
<!-- 2017/09/15 22:42 -->
  <head>
    <!-- Required meta tags -->
    <meta charset="utf-8">
    <meta name="viewport" content="width=device-width, initial-scale=1">
    <title>PC Help- The One & Only Blog For your Gadgets</title>  
    <!-- Bootstrap CSS -->
    <link href="https://fonts.googleapis.com/css?family=Baloo+Tammudu" rel="stylesheet">   
    <link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0-beta/css/bootstrap.min.css" integrity="sha384-/Y6pD6FV/Vv2HJnA6t+vslU6fwYXjCFtcEpHbNJ0lyAFsXTsjBbfaDjzALeQsN6M" crossorigin="anonymous">
    <link href="style.css" rel="stylesheet">
    <link rel="stylesheet" href="font-awesome-4.7.0/css/font-awesome.min.css">
      <link rel="stylesheet" href="css/styles.css" />
     <link type="text/css" rel="stylesheet" href="animate.css">
   <script
              src="https://code.jquery.com/jquery-3.2.1.min.js"
              integrity="sha256-hwg4gsxgFZhOsEEamdOYGBf13FyQuiTwlAQgxVSNgt4="
              crossorigin="anonymous"></script>
    <script type="text/javascript" src="js/jquery.aniview.js"></script>
  </head>
  <body>
     <div class="container"> 
        <nav class="navbar navbar-expand-lg navbar-light">
              <a class="navbar-brand" href="#"></a>
              <button class="navbar-toggler" type="button" data-toggle="collapse" data-target="#navbarSupportedContent" aria-controls="navbarSupportedContent" aria-expanded="false" aria-label="Toggle navigation">
                <span class="navbar-toggler-icon"></span>
              </button>

css

body{
    margin:0px auto;
}
h1,h2,h3,h4,h5,h6,a{
    font-family:'Baloo Tammudu', cursive;
}
.navbar{
    background:  yellow;
    opacity: .6;
    width: 1110px;
    box-shadow: 0 4px 8px 0  rgba(0, 0, 0, 0.2), 0 6px 20px 0  rgba(0, 0, 0, 0.29);
    text-align: center;
}
#black-shadow{
    border-bottom-right-radius: 7px;
    border-bottom-left-radius: 7px;
}
#black-shadow img{
    max-width: inherit;
    width: 325px;
}
.circle-item{
    background-color:  #424242;
    box-shadow: 0 4px 8px 0  rgba(0, 0, 0, 0.2), 0 6px 20px 0  rgba(0, 0, 0, 0.29);
    text-align: center;
    border-top: 10px solid #red;
    padding-bottom:5%;
}

BROWSER

Console