/* Importing Google Font [style: Cabin] */

@import url('https://fonts.googleapis.com/css2?family=Cabin&display=swap');



* {
  box-sizing: border-box;
}

body {
  margin: 0;
  padding: 0;
  background-color: rgb(176, 97, 250);
  font-family: 'Cabin', sans-serif;
}

.calculator {
  background: aquamarine;
  width: 600px;
  height: 720px;
  padding: 20px;
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  text-align: center;
  border: 10px double red;
  border-radius: 20px;
}

.result {
  background-color: rgb(245, 253, 166);
  width: 90%;
  margin: 8px 0 20px 10px;
  text-align: center;
  height: 60px;
  font-size: 42px;
  padding-right: 12px;
  overflow: hidden;
  box-shadow: inset 0 0 10px rgba(0, 0, 0, 0.5), inset 0 2px 0 #a1a1a1;
}

ul {
  padding: 0;
  margin: 0;
}

ul li {
  list-style: none;
  background: yellowgreen;
  padding: 10px;
  margin: 10px;
  cursor: pointer;
  border-radius: 8px;
  width: 16%;
  height: 16%;
  font-size: large;
  font-weight: 900;
  color: rgb(132, 107, 189);
  float: left;
}

ul li:active {
  position: relative;
  top: 5px;
  box-shadow: inset 0 1px 2px rgba(0, 0, 0, 0.33);
}
ul li:nth-child(16) {
  height: 75px;
}

ul li:last-child {
  margin-top: -48px;
  width: 65%;
}



.signature {
  font-size: 0.75rem;
  text-align: right;
  top: 4px;
  right: 5px;
  color: #fff;
  border: 1px solid;
  position: relative;
  z-index: -1;
}