html {
  font-size: 62.5%;
  box-sizing: border-box;
}

*, *::before, *::after {
  margin: 0;
  padding: 0;
  box-sizing: inherit;
}
.name {
  text-align: center;
  font-size: 20px;
  font-family:'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
  margin-top: 3px;
}

.body {
  border: 2px solid rgb(0, 0, 0);
  border-radius: 5px;
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 400px;
  background-color: rgba(73, 85, 83, 0.308);
}

.screen {
  width: 94%;
  height: 80px;
  border: 1px solid rgb(0, 0, 0);
  margin-left: 12px;
  margin-right: 12px;
  margin-bottom: 5px;
  margin-top: 10px;
  background-color: #fdfdfd;
}

.screen2 {
  width: 100%;
  font-size: 5rem;
  height: 75%;
  padding-right: 10px;
  padding-left: 10px;
  background-color: #fdfdfd;
  color: rgb(15, 15, 15);
  text-align: right;
}
.screen1 {
  width: 100%;
  font-size: 2rem;
  height: 25%;
  padding-right: 10px;
  padding-left: 10px;
  background-color: #fdfdfd;
  color: rgb(15, 15, 15);
  text-align: right;
}

button {
  height: 60px;
  background-color: #fff;
  border-radius: 3px;
  border: 1px solid #c4c4c4;
  background-color: transparent;
  font-size: 3rem;
  color: #333;
  background-image: linear-gradient(to bottom,transparent,transparent 50%,rgba(0,0,0,.04));
  box-shadow: inset 0 0 0 1px rgba(255,255,255,.05), inset 0 1px 0 0 rgba(255,255,255,.45), inset 0 -1px 0 0 rgba(255,255,255,.15), 0 1px 0 0 rgba(255,255,255,.15);
  text-shadow: 0 1px rgba(255,255,255,.4);
}

button:hover {
  background-color: #eaeaea;
}

.operator {
  background-color: #337cac;
  color: #fff;
}

.clear {
  background-color: #f0595f;
  border-color: #b0353a;
  color: #fff;
  grid-column: 1/3;
}
.delete {
  background-color: #f0595f;
  border-color: #b0353a;
  color: #fff;
  grid-column: 3/5;
}

.clear:hover, .delete:hover{
  background-color: #f17377;
}

.equal {
  background-color: #2e86c0;
  border-color: #337cac;
  color: #fff;
}

.equal:hover {
  background-color: #4e9ed4;
}

.keys {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  grid-gap: 10px;
  padding: 20px;  
}
.btn, .point {
 background-color: #fff; 
}