* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  background-color:silver;
}

.container {
  height: 100vh;
  width: 320px;
  display: flex;
  flex-direction: column;
  padding: 18px;
  justify-content: center;
  margin: auto;
}

.cls {
  box-shadow: 0 0 15px;
  padding: 20px;
  text-align: center;
  border-radius: 20px;
  transition: all 0.2 ease-in-out;
}

.input {
  all: unset;
  background-color: white;
  padding: 8px;
  border-radius: 6px;
  margin-bottom: 20px;
  text-align: end;
}
input{
    padding: 15px;
    width: 50px;
    border-radius: 50%;
    margin: 5px 2px;
    font-weight: bold;
    background-color:gray;
    color: white;
}
input:hover{
    background-color:lightgray;
    border: 2px solid rgb(119, 9, 9);
}
.poerator{
    color:goldenrod;
}
.equal{
  border-radius: 10px;
  width: 6.5rem ;
}