.password-input {
  width: 100%;
  height: 80px;
  border: 1px solid #ccc;
  position: relative;
  margin: 10px 0;
  overflow: hidden;
}
.password-input.active {
  border-color: rgba(82, 168, 236, 0.8);
  outline: 0;
  -webkit-box-shadow: inset 0 1px 1px rgba(0, 0, 0, 0.075), 0 0 8px rgba(82, 168, 236, 0.6);
  box-shadow: inset 0 1px 1px rgba(0, 0, 0, 0.075), 0 0 8px rgba(82, 168, 236, 0.6);
}
.password-input.hidden {
  display: none;
}
.password-input input {
  width: 1px;
  height: 1px;
  opacity: 0;
  position: absolute;
  top: 0;
  left: 0;
  font-size: 1px;
}
.password-input .password-input-container {
  width: 100%;
  height: 100%;
  display: -webkit-box;
  display: -webkit-flex;
  display: -ms-flexbox;
  display: flex;
}
.password-input li {
  -webkit-box-flex: 1;
  -webkit-flex: 1;
      -ms-flex: 1;
          flex: 1;
  height: 100%;
  border-right: 1px solid #ccc;
  position: relative;
}
.password-input li:last-child {
  border-right: 0px;
}
.password-input li.password::after {
  content: '';
  position: absolute;
  width: 20px;
  height: 20px;
  border-radius: 20px;
  background-color: black;
  left: 50%;
  top: 50%;
  margin-left: -10px;
  margin-top: -10px;
}