floats no longer working

/* Web Fonts -------------------- */

@font-face {
  font-family: 'Abolition Regular';
  src: url('../fonts/abolition-regular-webfont.eot');
  src: url('../fonts/abolition-regular-webfont.eot?#iefix') format('embedded-opentype'),
       url('../fonts/abolition-regular-webfont.woff') format('woff'),
       url('../fonts/abolition-regular-webfont.ttf') format('truetype');
}

/* Base Styles -------------------- */

* {
  box-sizing: border-box;
}

body {
  color: #878787;
  margin: 0;
  font: 1em/1.5 "Helvetica Neue", Helvetica, Arial, sans-serif;
}

h1,
h2 {
  font-family: 'Abolition Regular', Helvetica, Arial, sans-serif;
}

h1 {  
  font-size: 5.625rem; /* 90px/16px  */
  color: rgba(255, 255, 255, 1);
  text-transform: uppercase;
  font-weight: normal;
  line-height: 1.3;
  text-shadow: 0 1px 1px rgba(0,0,0, .8);
  margin: 12px 0 0;
}

h2 {
  font-size: 3.3125em; /* 53px/16px  */
  font-weight: normal;
  line-height: 1.1;
  margin: 0 0 .5em; /* 0 0 26px */
}

h3 {
  font-size: 1.25em; /* 20px/16px  */
  color: #48525c;
  line-height: 1.2;
  margin-bottom: 1.7em; /* 34px */
}

img {
  max-width: 100%;
  margin-bottom: 20px;
}

ul,
ol {
  margin: 30px 0;
}

li {
  margin-bottom: 10px;
}

/* Pseudo-classes ------------------ */

a:link {
  color: rgb(255, 169, 73);
  text-decoration: none;
}

a:visited {
  color: lightblue;
}

a:hover {
  color: rgba(255, 169, 73, .4);
}

a:active {
  color: lightcoral;
}

/* Main Styles --------------------- */

.main-header {
  padding-top: 170px;
  height: 850px;

  background:  linear-gradient(#ffa949, transparent 90%),
               linear-gradient(0deg, #fff, transparent),
               #ffa949 url('../img/mountains.jpg') no-repeat center;

  background-size: cover;

}

.title {
  color: white;
  font-size: 1.625rem; /* 26px/16px */
  letter-spacing: .065em;
  font-weight: 200;
  border-bottom: 2px solid;
  padding-bottom: 10px;
}

.intro {
  font-size: 1.25em; /* 20px/16px */
  line-height: 1.6;  
}

.primary-content,
.main-header,
.main-footer {
  text-align: center;
}

.primary-content {
    padding-top: 25px;
  padding-bottom: 95px;
}

.secondary-content {
    padding-top: 80px;
    padding-bottom: 70px;
  border-bottom: 2px solid #dfe2e6;  
}

.callout {
  font-size: 1.25em;
  border-bottom: 3px solid;
  padding: 0 9px 3px;
  margin-top: 20px;
  display: inline-block;
}

.main-footer {
  padding-top: 60px;
  padding-bottom: 60px;
  border-bottom: 10px solid #ffa949;
}

.t-border {
  border-top: 2px solid #dfe2e6;
}

/* Layout Styles ------------------ */

.primary-content, 
.secondary-content {
  width: 75%;
  padding-left: 50px;
  padding-right: 50px;
  margin: auto;
  max-width: 960px;
}

.wildlife {
  color: white;
  text-align: left;
  padding: 18% 24%;
  border-top: 10px solid #ffa949;
  margin: 105px 0 60px;
  background: #434a52 url('../img/bear.jpg') no-repeat center;
  background-size: cover;
  box-shadow: inset 0 0 50px 10px rgba(0,0,0, .8);

  border-radius; 25px;
}

.arrow {
  width: 50px;
  margin-top: 150px;
}

/* Floated Columns ------------------ */

.resorts,
.tips {
  width: 46.5%;
}

.tips {
  float: left;
}

.resorts {
  float: right;
}

/* Float Clearfix ------------------ */

.group:after {
  content: "";
  display: table;
  clear: both;
}

/* Media Queries ------------------ */

/*
@media (max-width: 960px) {
  body {
    background: royalblue;
  } 
}

@media (max-width: 480px) {
  body {
    background: darkred;
  }
}

@media (min-width: 481px) and (max-width: 700px) {
  body {
    background: seagreen;
}
p {
  color: white;
  }
}
*/

@media (max-width: 1024px) {
  .primary-content,
  .secondary-content {
    width: 90%;  
  }
  .wildlife {
    padding: 10% 12%;
    margin: 50px 0 20px;
  }
}

@media (max-width: 768px) {
  .primary-content,
  .secondary-content {
    width: 100%;
    padding: 20px;
    border-top: none;
  }

.main-header {
  max-height: 380px;
  padding: 50px 25px 0;

  }
}

 .title {
 font-size: 1.3rem;
 border: none;
}

h1 {
  font-size: 5rem;
  line-height: 1.1;

}

.arrow {
  display: none;
}
.intro {
  font-size: 1rem;
  }

.resorts,
.tips {
  float: none;
  width: 100%;
 }

}

    <div class="primary-content t-border">
        <p class="intro">
            Lake Tahoe is one of the most breathtaking attractions located in California. It's home to a number of ski resorts, summer outdoor recreation, and tourist attractions. Snow and skiing are a significant part of the area's reputation.
        </p>
        <a class="callout" href="#more">Find out more</a>

  <div class="wildlife">
    <h2>Check out all the Wildlife</h2>
    <p>
      As spawning season approaches, the fish acquire a humpback and protuberant jaw. After spawning, they die and their carcasses provide a feast for gatherings of <a href="#mink">mink</a>, <a href="#bears">bears</a>, and <a href="#eagles">bald eagles</a>.
    </p>
  </div><!-- End .wildlife -->

        <a class="callout" href="#wildlife">See the Wildlife</a>
    </div><!-- End .primary-content -->

    <div class="secondary-content t-border group"> 
  <div class="resorts">
    <img src="img/resort.jpg" alt="Resort">
    <h3>From Tents to Resorts</h3>
    <p>
      Lake Tahoe is full of wonderful places to stay. You have the ability to sleep in the outdoors in a tent, or relax like a king at a five star resort. Here are our top three resorts:
    </p>
    <ul>
      <li><a href="#hotels">Lake Tahoe Resort Hotel</a></li>
      <li><a href="#resorts">South Lake Tahoe Resorts</a></li>
      <li><a href="#lodging">Tahoe Ski Resort Lodging</a></li>
    </ul>       
  </div>

  <div class="tips">
    <img src="img/mtn-landscape.jpg" alt="Mountain Landscape">
    <h3>Pack Accordingly</h3>
    <p>
      One of most important things when it comes to traveling through the great outdoors is packing accordingly. Here are a few tips:
    </p>
    <ol>
      <li>Bring layers of clothing</li>
      <li>Pack sunscreen</li>
      <li>Carry extra water just in case</li>
      <li>Pack light</li>
    </ol>
  </div>
    </div><!-- End .secondary-content -->

    <footer class="main-footer">
        <p>All rights reserved to the state of <a href="#">California</a>.</p>
        <a href="#top">Back to top &raquo;</a>
    </footer>