index.css

body {
  background-color: #2c3e50;
  color: white;
}

.container{
  text-align: center;
  margin-top: 200px;
}

.js-clock .time{
  font-size: 6rem;

}

.js-form input{
  background-color: rgba(255,255,255,.5);
  color:#2c3e50;
  font-size: 4rem;
  border: 0;
}

.js-toDoList{
  list-style: none;
}

.btn {
  cursor: pointer;
}

.clicked {
  color: #7f8c8d;
}

.form,
.greetings {
  display: none;
}

.showing {
  display: block;
}

@keyframes fadeIn {
  from {
    opacity: 0;
  }
  to {
    opacity: 1;
  }
}

.bgImage {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: -1;
  animation: fadeIn 1s linear;
}