.modal {
  position: fixed;
  top: 0;
  left: 0;
  bottom: 0;
  right: 0;
  display: none;
  overflow: auto;
  background-color: #000000;
  background-color: rgba(0, 0, 0, 0.7);
  z-index: 9999;
}

.modal-window {
  position: relative;
  background-color: #FFFFFF;
  width: 50%;
  margin: 10% auto;
  padding: 20px;
}

.close {
  position: absolute;
  top: 0;
  right: 0;
  color: rgba(0,0,0,0.3);
  height: 30px;
  width: 30px;
  font-size: 30px !important;
  line-height: 30px;
  text-align: center;
}

.close:hover,
.close:focus {
  color: #000000;
  cursor: pointer;
}

.open {
  display: block !important;
}

.modal#modal-birthdate {
  color: #212529;
  font-size: 1.6rem;
}

.modal#modal-birthdate p {
  color: #212529;
  font-size: 1.6rem;
}

.modal#modal-birthdate p.msg {
  display: none;
}

.modal#modal-birthdate p.msg-continue a {
  border: none;
}

.modal#modal-birthdate p.msg-close button {
  background-color: #D8D8D8;
  color: #212529;
}

.modal#modal-birthdate button {
  background-color: #0155b0;
  border: none;
  color: white;
  text-transform: uppercase;
}

input#birth-date {
  margin-bottom: 10px;
  margin-right: 10px;
  width: calc(100% - 100px);
  float: left;
}

div.msg-container .msg {
  font-weight: 700;
}

@media screen and (max-width: 700px) {
  .modal-window {
    width: 90%;
  }
}

@media screen and (max-width: 400px) {
  input#birth-date {
    width: 100%;
    float: initial;
  }
}