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About the <head>

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CSS

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CSS Base

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JavaScript

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JavaScript preprocessors can help make authoring JavaScript easier and more convenient.

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Babel includes JSX processing.

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HTML 

              
                
<!--Start of row--> 
  <header class="row header">
  
 <!--Start of header column--> 
    <div class="text-center col-12">
    
    <img class="logo" src="https://i.postimg.cc/8z0dKTcL/cookiesandcupcakes-logo-for-site.png" alt="logo" />
    </div> 
</header>
<!-- end header column -->

<!-- Nav Start-->
<ul class="nav justify-content-center">
  <li class="nav-item">
    <a class="nav-link disabled" href="#" tabindex="-1" aria-disabled="true">Home</a>
  </li>
  <li class="nav-item">
    <a class="nav-link" href="#">About</a>
  </li>
  <li class="nav-item">
    <a class="nav-link" href="#">Treats</a>
  </li>
  <li class="nav-item">
    <a class="nav-link" href="#">Visit Us</a>
  </li>
  <li class="nav-item">
    <a class="nav-link" href="#">Contact</a>
  </li>
</ul>
<!-- Nav End -->
 

  <!--Start Cupcake of Month container-->
  <div class="jumbotron">
  <h1 class="display-4">Try our Cupcake of the Month!</h1>
  <p class="lead">SALTED CARAMEL MOCHA</p>
  <hr class="my-4">
  <p>Inspired by a coffeehouse favorite, you are sure to love this sweet and salty treat.</p>
    <div class="text-center">
      <a class="button btn btn-lg" href="#" role="button">Learn More</a></div>
</div>
<!--End Cupcake of Month container-->

<!-- Start Browse Treats -->
<div class="container col-12">
<div class="col-12">
      <br>
       <h2> Browse our selection of delicious treats</h2> <br>
    </div> 
    <!--End of first column-->
  </div>
  
<div class="container">
  <!--Start of More Treats row-->
 <div class="row">
  
    <!--Start of first column--> 
   <div class="col-12 col-sm-4">
  
      <a href=""><img class="img-responsive" src="https://i.postimg.cc/15DsK1cX/cookie-photo.png" alt="Cookies"/></a>
      <h5>Cookies</h5>
    
   </div>
   <!--End of first column-->
   
  <!--Start of second column-->  
  <div class="col-12 col-sm-4"> 
    
    <a href=""><img class="img-responsive" src="https://i.postimg.cc/wBCw2Zkx/more-cupcakes-photo.png" /></a>
    <div class="container" style="text-align: center;">
    <h5>Cupcakes</h5>
  </div>
   </div>
  <!--End of second column--> 
   
  <!--Start of third column-->  
  <div class="col-12 col-sm-4"> 
    
    <a href=""><img class="img-responsive" src="https://i.postimg.cc/wvFsMs3K/more-treats-photo.png" /></a>
    <h5>More Treats</h5>
    <br>
    
  </div>
  <!--End of third column--> 
     
 </div> <!--End of row--> 
  <div class="text-center">
    <p>Order online for local delivery!</p>
      <a class="button btn btn-lg" href="#" role="button">Place an Order</a></div> <br>
</div>
</div> <!--End of container--> 


<div class="mailinglist container col-12">
  <p> Join our mailing list to stay up to date with what's new and recieve exclusive offers. </p>
  <form>
  <div class="form-group">
    <div class="row col-12"> <!-- start enter email -->
    <input type="email" class="form-control col-7" id="exampleInputEmail1" aria-describedby="emailHelp" placeholder="Enter email"> 
      </div> <!-- end enter email -->
    
        <small style="color: white;" id="emailHelp" class="form-text text-muted">We hate spam and promise to keep your inbox free of it.</small>
    <br>
    
    <div class=" row col-12"> <!--start submit-->
    <button type="submit" class="btn button col-3 submit">Submit</button>
      </div> <!--end submit-->
  </div> <!--end form group-->
  </div> <!--end mailing list-->
  
  <div id="footer">
  <footer class="row footer">
    
  <!--Start of first column-->  
  <div class="col-12 col-sm-6">  
      <h4 class="footer-headline">Our Hours</h4>
      <dl>
        <dt>Monday</dt>
        <dd>8:00-5:00<dd/>
        <dt>Tuesday</dt>
        <dd>8:00-5:00<dd/>
        <dt>Wednesday</dt>
        <dd>8:00-5:00<dd/>
        <dt>Thursday</dt>
        <dd>8:00-5:00<dd/>
        <dt>Friday</dt>
        <dd>8:00-6:00<dd/>
        <dt>Saturday</dt>
        <dd>9:00-12:00<dd/>
        <dt>Sunday</dt>
        <dd>Closed<dd/>
    </dl>
   </div>   <!--End of first column-->  
    
    <div class="col-12 col-sm-6 social">
      <h4 class="footer-headline">Let's Socialize</h4>
        <a href=""><i class="fa fa-facebook" style="font-size:30px;"></i></a>
      <a href=">"<i class="fa fa-twitter"style="font-size:30px;"></i></a>
    <a href=">"<i class="fa fa-instagram"style="font-size:30px;"></i></a>
<a href=">"<i class="fa fa-pinterest"style="font-size:30px;"></i></a>
<br>
<br>
<h4 class="footer-headline" style="padding-bottom: 5px;">Visit Us</h4>
<p style="text-align: left;">815 Orange St, Orlando, FL 32801</p>
      </div>

    <div class="text-center col-12 copyright">Copyright © 2019 Cookies and Cupcakes Bakery. All Rights Reserved.</div>
    </footer>
    </div> <!-- end footer -->
!

CSS 

              
                body{
  background-color: #664232;
  color: white;
  font-family: "open sans";
}

.header{
  background-color: white;
  padding-top: 20px;
  padding-bottom: 20px;
}

.nav{
  background-color: white;
  text-transform: capitalize;
  padding-bottom: 20px;
}

.nav a{
  text-transform: capitalize;
  color: #664232;
}

.nav a:hover{
  border: none;
}

.nav-link active{
  background-color: #F78E7B;
  font-weight: bold;
}

p{
  text-align: center;
  font-size: 17px;
}

h1, h2, h3, h4, h5, h6{
  text-align: center;
  font-weight: normal;
  font-family: "Arima Madurai", "open sans", sans-serif;
}

h1{
  color: ;
}

a{
  text-align: center;
  color: #F78E7B;
  font-weight: 500;
  font-size: 18px;
}

a:hover{
  color: #F78E7B;
  text-decoration: none;
}

.button{
  background-color: #F78E7B;
  color: white;
  border: 1px solid white;
  width: 200px;
  border-radius: 10px;
  margin-bottom: 15px;
  font-size: 18px;
}

.caramel{
  text-transform: uppercase;
}

.img-responsive{
  width: 100%;
  height: auto;
  padding-bottom: 10px;
  padding-top: 10px;
}

.logo{
  width: 200px;
}

.btn btn-primary{
  color: white;
  background-color: #F78E7B;
}

.btn:hover{
  color: #664232;
}

#cupcakeofmonth{
  background-color: #F78E7B;
  padding-bottom: 10px;
  padding-top: 20px;
  margin-bottom: 25px;
}

#cupcakeofmonth p{
  text-align: center;
  font-size: 18px;
}

#cupcakeofmonth h1, h3{
  font-weight: bold;
}

#browsetreats{
  padding-bottom:
    50px;
}

.jumbotron{
 background-image:    url(https://i.postimg.cc/qvv2Bss0/cookiesandcupcakes-photo-for-desktop-site2.jpg);
  background-size: cover;
  background-repeat: no-repeat;
  color: #664232;
  border-bottom: 3px solid #F78E7B;
  height: 800px;

}

.lead{
  font-size: 28px;
  font-weight: 400;
}

.mailinglist{
  background-color: #F78E7B;
  padding-top: 25px;
  padding-bottom: 25px;
}

.form-control{
  width: 500px;
  margin: 0 auto;
}

.form-text{
  text-align: center;
}

.submit{
  margin: 0 auto;
}

.text-muted {
    color: #fff !important;
}

footer{
  padding: 35px;
}


footer dt {
  float:left;
  width:50%;
}

.footer-headline{
  text-align: left;
  padding-bottom: 10px;
  padding-top: 20px;
}

.copyright{
  margin: 0 auto -40px;
  text-align: center;
  font-size: 14px;
  padding-top: 10px;
}

ul{
  list-style: none;
}

.fa{
  padding-right: 20px;
}

.social{
  margin-bottom: 20px;
}
!

JS 

              
                var paragraphs = document.getElementsByTagName("p");
paragraphs[0];
!
999px

Console