.color-background {
  display: flex;
  flex-flow: column nowrap;
  align-items: center;
  justify-content: center;

  padding: 1rem;
  min-height: 100vh;
  background-color: goldenrod;
  transition: all 0.25s;
}

.game {
  max-width: 400px;
  padding: 15px 15px 10px 15px;
  margin: 0 auto;
  border-radius: 0.5rem;

  box-shadow: 0 0 10px 15px rgba(126, 75, 75, 0.05);
  background-color: #fff;
}

@media only screen and (min-width: 768px) {
  .game {
    padding: 30px 50px;
  }
}

.game__title {
  font-weight: bold;
  text-align: center;
  text-transform: uppercase;
  color: mediumslateblue;
}

.game__timer {
  margin-top: 0.5rem;
  text-align: center;
  font-size: 1.5rem;
}

.game__button-wrapper {
  text-align: center;
  margin: 0.5rem 1rem;
}

.game__button {
  display: none;
  padding: 0.5rem 2.5rem;
  margin: 0 auto;
  border: 1px solid goldenrod;
  border-radius: 0.25rem;

  color: white;
  background-color: goldenrod;

  outline: none;
  transition: all 0.25s;
  cursor: pointer;
}

.game__button.show {
  display: inline-block;
}

.game__button:hover {
  opacity: 0.9;
}

.game__button:active {
  opacity: 0.7;
}

.color-list {
  display: flex;
  flex-flow: row wrap;
  width: 300px;
  margin: 0 auto;
}

.color-list > li {
  position: relative;

  width: 65px;
  height: 65px;
  border-radius: 4px;
  margin: 5px;
  overflow: hidden;

  background-color: #ccc;
  transition: all 0.25s ease 0s;
  cursor: pointer;
}

.color-list > li .overlay {
  content: '';
  position: absolute;
  left: 0;
  bottom: 0;
  right: 0;

  height: 100%;
  max-height: 0;

  transition: all 0.25s;
  background-color: black;
}

.color-list > li.active .overlay {
  max-height: 100%;
}

.color-list > li:hover {
  background-color: #ddd;
}

/* ************ */
/*    FOOTER    */
/* ************ */
footer {
  margin-top: 1rem;
  color: rgba(255, 255, 255, 0.75);
  font-size: 14px;
}