styles.css

*{
  font-family:  'Kumbh Sans', sans-serif;
  box-sizing: border-box;
}
.container{
  display: flex;
  align-items: center;
  justify-content: center;
  width: 90vw;
  height: 700px;
  background: cornsilk;
  background: linear-gradient(to bottom, rgb(171, 193, 206), rgb(188, 248, 235));
  background: -webkit-linear-gradient(to bottom, rgb(171, 193, 206), rgb(188, 248, 235));
  margin: 20px auto;
}
.calculator{
  background-color: rgb(84, 83, 90);
  width: 400px;
  height: 540px;
  border: 1px solid white;
  border-radius: 6px;
  position: relative;
}
.result{
  width: 90%;
  height: 120px;
  border: 1px solid white;
  border-radius: 4px;
  margin: 20px auto;
  padding: 4px;
  display: flex;
  flex-direction: column;
  flex-wrap: wrap;
  background: rgb(235, 246, 248);
}
.compute{
  height: 50%;
  width: 348px;
  overflow: hidden;
  ;
}
.compute p{
  float: right;
  font-size: 30px;
  margin: 10px auto;
  text-align: center;
  color: rgb(25, 22, 46);
}
.output{
  height: 50%;
  width: 348px;
  padding: auto 4px;
  overflow: hidden;
}
.output p{
  float: right;
  font-size: 40px;
  margin: 8px auto;
  text-align: center;
  color: rgb(9, 1, 31);
}
.keyboard{
  width: 90%;
  height: 360px;
  border: 1px solid rgb(221, 220, 220);
  margin: 20px auto;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  border-radius: 4px;
}
button{
  margin: auto;
  width: 60px;
  height: 60px;
  border-radius: 50px;
  border: none;
  font-size: 25px;
  cursor: pointer;
}
.operator{
  background-color: rgb(221, 220, 220);
  color: rgb(0, 0, 0);
  font-size: 30px;
}

#clear{
  background-color: rgb(238, 102, 142);
  color: white;
  border: 0.25px solid rgb(199, 178, 178);
  font-size: 25px;
}
#backspace{
  background-color: rgb(170, 167, 5);
  color: white;
  border: 0.25px solid rgb(199, 178, 178);
  font-size: 25px;
}
#percent{
  background-color: rgb(80, 143, 119);
  color: white;
  border: 0.25px solid rgb(199, 178, 178);
  font-size: 25px;
}
.number{
  background-color: rgb(46, 42, 42);
  color: white;
  border: 0.25px solid rgb(128, 128, 128);
}
.float-point{
  background-color: rgb(46, 42, 42);
  color: white;
  border: 0.25px solid rgb(128, 128, 128);
  font-size: 30px;
}