:root {
  --color1: #434a5e;
  --color2: #464239;
  --color3: #deb983;
  --color4: #83d4de;
  --color5: #839ade;
}

* {
  margin: 0px;
  border: 0px;
  padding: 0px;
}

body {
  overflow: hidden;
  background-color: var(--color2);
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: monospace;
  font-weight: 500;
  height: 100vh;
}
.calculator {
  background-color: var(--color1);
  display: flex;
  flex-direction: column;
  width: fit-content;
  height: fit-content;
  padding: 40px 24px;
  border-radius: 10px;
  border: 2px solid rgba(0, 0, 0, 0.427);
  box-shadow: 4px 2px 3px rgba(0, 0, 0, 0.427);
}

p {
  text-align: center;
  font-size: 1.8em;
  font-weight: 700;
  color: white;
  text-shadow: 1px 2px 3px rgba(0, 0, 0, 0.436);
  grid-area: cal;
  user-select: none;
}

.display {
  align-self: center;
  margin: 10px 0px;
  padding: 15px 20px;
  border: 0px;
  border-radius: 4px;
  outline: none;
  font-size: 15px;
  grid-area: display;
  text-align: right;
  box-shadow: 2px 3px 3px rgba(0, 0, 0, 0.26);
  font-size: 18px;
}

.calculator-keys {
  display: grid;
  grid-template-areas: 
  "cal cal cal cal"
  "display display display display"
  "key key key key"
  "key key key key"
  "key key key key"
  "key key key key";
  User-select: none
}

.keys,
.dell {
  padding: 18px;
  border-radius: 50%;
  margin: 4px;
  box-shadow: 2px 3px 3px rgba(0, 0, 0, 0.342);
}
.keys:hover, .dell:hover, .submit:hover {
  cursor: pointer;
}

.operator {
  background-color: var(--color3);
  color: #fefefe;
  font-size: 15px;
  font-weight: bold;
}

.keys:active, .dell:active, .submit:active, .operator:active{
  transform: scale(.95);
}

@media screen and (min-width:800px) {
  .number:hover, .dell:hover, .submit:hover {
    background-color: var(--color2);
    color: white;
    font-weight: bold;
  
  }

  .operator:hover {
    background-color: var(--color5);
    color: #000;
  }
  
}