@media (max-width: $screen-sm-min) {
  #landing-page,
  #signup-success {
    padding-top: 15px;
    text-align: center;

    #registration-links {

      #sign_up_button {
        display: block;
      }

      #sign_in {
        display: block;
      }
    }

    .jumbotron {
      margin-bottom: 15px;

      padding: {
        left: 1px;
        right: 1px;
      }

      .page-header {
        margin: {
          left: 15px;
          right: 15px;
          bottom: 0;
        }
      }
    }
  }
}

@media (min-width: $screen-sm-min) {
  #landing-page,
  #signup-success {
    padding-top: 50px;
  }
}

#landing-page,
#signup-success {

  .jumbotron {
    background-color: rgba(238, 238, 238, 0.95);
  
    .page-header {
      img {
        margin-right: 10px;
        max-width: 20%;
      }
    }

    .lead {
      font-size: 25px;
      font-weight: 400;
    }
  }

  #registration-links {
    padding-top: 20px;
    font-size: 21px;

    #sign_in {
	  font-weight: bolder;
    }
  }

  #demo-link {
    font-size: 16px;
    margin-top: 20px;
  }
}

@media (max-width: $screen-sm-min) {
  #landing-page,
  #signup-success {
    padding-top: 15px;
    text-align: center;

    #registration-links {

      #sign_up_button {
        display: block;
      }

      #sign_in {
        display: block;
      }
    }

    .jumbotron {
      margin-bottom: 15px;

      padding: {
        left: 1px;
        right: 1px;
      }

      .page-header {
        margin: {
          left: 15px;
          right: 15px;
          bottom: 0;
        }
      }
    }
  }
}

@media (min-width: $screen-sm-min) {
  #landing-page,
  #signup-success {
    padding-top: 50px;
  }
}

#landing-page,
#signup-success {

  .jumbotron {
    background-color: rgba(238, 238, 238, 0.95);
  
    .page-header {
      border: 0;

      img {
        margin-right: 10px;
        max-width: 20%;
      }
    }

    .lead {
      font-size: 25px;
      font-weight: 400;
    }
  }

  #registration-links {
    padding-top: 20px;
    font-size: 21px;

    #sign_in {
	  font-weight: bolder;
    }
  }

  #demo-link {
    font-size: 16px;
    margin-top: 20px;
  }
}

Remove unnecessary border from CSS.
Remove unnecessary border from CSS.
