/* Basic styling  */
* {
  margin: 0;
  padding: 10;
}

body {
  background-color: #fafafa87;
  font-family: "Red Hat Display", sans-serif;
}

/* center calculator */
.calculator {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translateX(-50%) translateY(-50%);
  border-radius: 15px;
  overflow: hidden;
}

/* CSS for screen and screenContent , calculation , result */
.screen {
  height: 150px;
  background: #001e34;
  margin: 20px 20px 20px 20px;
  margin: auto;
}

.screenContent {
  text-align: end;
  padding: 17px;
  font-size: 30px;
  user-select: none;
}

.calculation {
  font-size: 12px;
  color: white;
  overflow: auto;
  padding-top: 2rem;
}

.result {
  font-size: 2.5rem;
  padding-top: 1rem;
  color: #fff;
}

/* CSS For table tr td and button keys , operator keys , math keys  */
table {
  background-color: #001e34;
  border-collapse: collapse;
}

tr,
td {
  border: 0.2px solid black;
  border-collapse: collapse;
}

.btn {
  width: 50px;
  height: 50px;
  font-size: 20px;
  cursor: pointer;
  border: none;
  background: #002b4a;
  color: white;
  outline: none;
}

.operator {
  color: #f3a108;
  font-family: "Fira Sans", sans-serif;
}

.math {
  color: #0dd037;
  font-family: "Fira Sans", sans-serif;
}

/* CSS for button hover  */
input[type="button"]:hover {
  background-color: #5d685e;
  color: #fff;
  transition: all 0.15s linear;
}