modal.css

.modal .modal-content {
  width: 100%;
  margin: 15% auto;
  background-color: #FEFEFE;
  border: none;
  border-radius: 0;
}

.modal .modal-content.modal-content-nav {
  width: 60%;
}

.modal .modal-content .modal-header {
  padding: 5px;
  text-align: center;
  letter-spacing: 1px;
  font-family: 'Saira Semi Condensed', sans-serif;
  color: white;
  background-color: #7F6CAF;
  text-transform: uppercase;
  border: none;
  -webkit-box-shadow: 0px 0px 6px #5D4A8D;
  -moz-box-shadow: 0px 0px 6px #5D4A8D;
  box-shadow: 0px 0px 6px #5D4A8D;
}

.modal .modal-content .modal-header .close {
  color: white;
  float: right;
  font-size: 28px;
  font-weight: bold;
}

.modal .modal-content .modal-header .close:hover,
.modal .modal-content .modal-header .close:focus {
  color: black;
  text-decoration: none;
  cursor: pointer;
}

.modal .modal-content .modal-body {
  padding: 20px 10px;
}

.modal .modal-content .modal-body p {
  margin: 0;
}

.modal .modal-content .modal-body a {
  color: #337AB7;
  border-bottom: 1px solid #337AB7;
}

.modal .modal-content .modal-body a:hover {
  text-decoration: none;
}

.modal .modal-content .modal-body .author {
  font-size: 12px;
  padding-bottom: 10px;
  letter-spacing: 1px;
}

.modal .modal-content .modal-body .description {
  font-size: 16px;
}

.modal .modal-content .modal-footer {
  padding: 15px;
  text-align: center;
  border: none;
  background-color: #7F6CAF;
  color: white;
  letter-spacing: 1px;
  -webkit-box-shadow: 0px 0px 6px #5D4A8D;
  -moz-box-shadow: 0px 0px 6px #5D4A8D;
  box-shadow: 0px 0px 6px #5D4A8D;
}

@media (max-width: 767px) {
  .modal .modal-content {
    margin: 30% auto 15%;
  }
}

@media (max-width: 1200px) {
  .modal .modal-content {
    width: 80%;
  }
}