.timeline {
  background: #EEEEEE;
  /* border: 1px solid black; */
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0.8;
}

.main-timeline {
  font-family: 'Quicksand', sans-serif;
  font-size: 18px;
  display: flex;
}

.main-timeline p {
  font-size: 20px;
  color: #F9F9F9;
  margin-left: 6px;
  background-color: rgba(0, 0, 0, 0.5);
  padding: 10px 13px;
  box-shadow: 2px 2px 10px black;
  border-radius: 5px;
}

.main-timeline p:first-of-type {
  margin-left: 12px;
}

.main-timeline p:last-of-type {
  margin-right: 6px;
}

body {
  background-image: url("./images/piano_wallpaper.jpg");
  font-family: 'Quicksand', sans-serif;
  background-size: cover;
}

h1 {
  font-size: 50px;
  color: #F9F9F9;
}

#description {
  font-size: 24px;
  color: #F9F9F9;
  background-color: rgba(0, 0, 0, 0.5);
  padding: 10px 15px;
  box-shadow: 2px 2px 10px black;
  border-radius: 5px;
  text-align: center;
}

.timeline {
  height: 250px;
  width: 750px;
  border-radius: 5px;
  box-shadow: 2px 2px 10px;
}

.app-content {
  height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
}

.keyboard {
  display: flex;
  height: 120px;
  padding-bottom: 30px;
}

.button {
  padding: 10px;
  background: #EEEEEE;
  box-shadow: 2px 2px 10px;
  border-radius: 5px;
}

.button:hover {
  cursor: pointer;
}

.play-button {
  margin-right: 15px;
  font-weight: 600;
}

.undo-button {
  margin-right: 15px;
}

.loop-button {
  margin-left: 15px;
}

.white-key {
  width: 50px;
  /* border: 1px solid black; */
  position: relative;
  top: 0;
  transition: top ease 0.5s;

  box-shadow: 2px 2px 10px;
  font-weight: 600;
  margin-right: 10px;
  display: flex;
  flex-direction: column;
  padding-bottom: 10px;
  justify-content: flex-end;
  text-align: center;
  border-radius: 3px;
  background-color: white;
  border: 1px solid #F9F9F9;
  cursor: pointer;
}

.invalid-key {
  background-color: rgba(0,0,0,.0975);
  cursor: not-allowed;
  border: 1px solid black;
}

.initial-valid-key:hover {
  background-color: #F9F9F9;
}

.valid-key {
  background-color: white;
  border: 1px solid gray;
  box-shadow: 2px 2px 10px #38EEFF;
}

.valid-key:hover {
  background-color: #F9F9F9;
  top: -10;
}

.buttons {
  display: flex;
  margin: 15px;
  padding: 15px 20px;
  align-items: center;
  border-top: 1px solid white;
  border-bottom: 1px solid white;
}

.links {
  position: fixed;
  left: 10px;
  bottom: 10px;

  display: flex;
  align-items: center;
  background-color: rgba(0, 0, 0, 0.5);
  border-radius: 5px;
  padding: 5px 10px;
}

.credit-text {
  color: #F9F9F9;
  font-size: 18px;
}

.links img {
  padding: 5px;
  background-color: white;
  margin-left: 10px;
  border-radius: 5px;
}

.links img:hover {
  opacity: 0.7;
}