Generated by SassMeister.com.

SassMeister-input.scss

// ----
// Sass (v3.4.7)
// Compass (v1.0.1)
// ----

.nt-tabs {
  margin: 5%;
  border: 1px solid;
  .nav-tabs>li {
    width: 25%;
    text-align: center;
    background: #666;
    border-right: 1px solid #fff;
    &:last-child {
      border: none;
    }
    a {
      color: #fff;
    }
  }
  li>a, .active>a, .active>a:hover, .active>a:focus {
    border: none;
    border: none !important;
    border-radius: 0;
    margin: 0;
  }
  .active>a, .active>a:hover, .active>a:focus {
    color: #000 !important;
  }
  .nav>li>a:hover, .nav>li>a:focus {
    text-decoration: none;
    background-color: #eee;
    color: #000 !important;
  }  
  .tab-content>.active {
    padding: 40px;
  }
}        

SassMeister-output.css

.nt-tabs {
  margin: 5%;
  border: 1px solid;
}
.nt-tabs .nav-tabs > li {
  width: 25%;
  text-align: center;
  background: #666;
  border-right: 1px solid #fff;
}
.nt-tabs .nav-tabs > li:last-child {
  border: none;
}
.nt-tabs .nav-tabs > li a {
  color: #fff;
}
.nt-tabs li > a, .nt-tabs .active > a, .nt-tabs .active > a:hover, .nt-tabs .active > a:focus {
  border: none;
  border: none !important;
  border-radius: 0;
  margin: 0;
}
.nt-tabs .active > a, .nt-tabs .active > a:hover, .nt-tabs .active > a:focus {
  color: #000 !important;
}
.nt-tabs .nav > li > a:hover, .nt-tabs .nav > li > a:focus {
  text-decoration: none;
  background-color: #eee;
  color: #000 !important;
}
.nt-tabs .tab-content > .active {
  padding: 40px;
}