body {
  margin: 0;
}

#frame {
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  min-height: 100vh;
  width: 100vw;
  background: linear-gradient(135deg, #1c1f26, #243447);
}

#main-container {
  display: flex;
  justify-content: center;
  flex-direction: column;
  background: #2a2f38;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.5);
}

#headings {
  display: flex;
  justify-content: space-evenly;
  color: #fff;
}

#container {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  width: 500px;
  margin: 0 auto;
}

.block {
  width: 100px;
  height: 100px;
  background: rgb(213, 213, 255);
  margin: 20px;
}

.fa-heart {
  margin: 5px;
}

#buttons {
  display: flex;
  justify-content: center;
}

button {
  background: rgb(235, 235, 253);
  border: #004 1px solid;
  width: 200px;
  height: 70px;
  margin: 20px;
  font-size: 20px;
}

.fa-heart {
  color: #f00;
}

/* Animtaion */

.block.active {
  width: 100px;
  height: 100px;
  margin: 20px;
  animation-name: example;
  animation-duration: 4s;
}

@keyframes example {
  0% {
    background-color: #004;
  }
  25% {
    background-color: #004;
  }
  50% {
    background-color: rgb(235, 235, 253);
  }
  75% {
    background-color: rgb(235, 235, 253);
  }
  100% {
    background-color: #004;
  }
}