* {
  margin: 0;
  padding: 0;
}

html,
body {
  height: 100vh;
}

.container {
  height: 100%;
  display: flex;
  justify-content: center;
  align-items: center;
}

.innerDiv {
  position: absolute;
  z-index: 1;
}

#calculator {
  -webkit-box-shadow: 0px 0px 9px 0px #000000;
  box-shadow: 0px 0px 9px 0px #000000;
  border: 1px solid black;
  background-color: #ded4e8;
  text-align: center;
}

input[type="button"] {
  width: 100%;
  padding: 30px 40px;
  --rgb: 199,57,95;
  background-color: rgb(var(--rgb));
  color: white;
  font-size: 24px;
  font-weight: bold;
  border: none;
  border-radius: 5px;
}

input[type="button"]:hover {
  background-color: rgb(var(--rgb), 0.8);
}

input[type="button"]:active {
  background-color: rgb(var(--rgb), 0.5);
}

input[type="button"].active {
  background-color: rgb(var(--rgb), 0.5);
}
 
input[type="text"] {
  background-color: #ded4e8;
  height: 90px;
  width: 430px;
  padding-left: 10px;
  font-size: 52px;
  font-weight: bold;
  border: none;
  border-radius: 5px;
  border: 2px solid rgb(0, 0, 0, 0.2);
  caret-color: transparent;
}

td > .key--clear,
td > .key--operator {
  --rgb: 232, 186, 64;
  background-color: rgb(var(--rgb));
  
}

td > .key--equal {
  --rgb: 46, 129, 179;
  background-color: rgb(var(--rgb));
}

#calculator td > .is-depressed {
  --rgb: 232, 186, 64, 0.8;
  background-color: rgb(var(--rgb));;
  backdrop-filter: brightness(50%);
}

/*Animation from codepen by Mohammad Abdul Mohaiman.*/
.area {
  background: #4e54c8;
  background: -webkit-linear-gradient(to left, #8f94fb, #4e54c8);
  width: 100%;
  height: 100vh;
}

.circles {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  overflow: hidden;
}

.circles li {
  position: absolute;
  display: block;
  list-style: none;
  width: 20px;
  height: 20px;
  background: rgba(255, 255, 255, 0.2);
  animation: animate 25s linear infinite;
  bottom: -150px;
}

.circles li:nth-child(1) {
  left: 25%;
  width: 80px;
  height: 80px;
  animation-delay: 0s;
}

.circles li:nth-child(2) {
  left: 10%;
  width: 20px;
  height: 20px;
  animation-delay: 2s;
  animation-duration: 12s;
}

.circles li:nth-child(3) {
  left: 70%;
  width: 20px;
  height: 20px;
  animation-delay: 4s;
}

.circles li:nth-child(4) {
  left: 40%;
  width: 60px;
  height: 60px;
  animation-delay: 0s;
  animation-duration: 18s;
}

.circles li:nth-child(5) {
  left: 65%;
  width: 20px;
  height: 20px;
  animation-delay: 0s;
}

.circles li:nth-child(6) {
  left: 75%;
  width: 110px;
  height: 110px;
  animation-delay: 3s;
}

.circles li:nth-child(7) {
  left: 35%;
  width: 150px;
  height: 150px;
  animation-delay: 7s;
}

.circles li:nth-child(8) {
  left: 50%;
  width: 25px;
  height: 25px;
  animation-delay: 15s;
  animation-duration: 45s;
}

.circles li:nth-child(9) {
  left: 20%;
  width: 15px;
  height: 15px;
  animation-delay: 2s;
  animation-duration: 35s;
}

.circles li:nth-child(10) {
  left: 85%;
  width: 150px;
  height: 150px;
  animation-delay: 0s;
  animation-duration: 11s;
}

@keyframes animate {
  0% {
    transform: translateY(0) rotate(0deg);
    opacity: 1;
    border-radius: 0;
  }

  100% {
    transform: translateY(-1000px) rotate(720deg);
    opacity: 0;
    border-radius: 50%;
  }
}