* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  font-family: Arial, Helvetica, sans-serif;
}

body {
  background-color: linen;
  height: 100vh;
  display: flex;
  justify-content: center;
  align-items: center;
}

.calc-container {
  padding: 20px;
  background-color: hsla(19.7, 91%, 13.1%, 0.66);
  width: 375px;
  border-radius: 5%;
}

.calc-header {
  padding: 5px;
  background-color: #d1dd97;
  text-align: end;
  font-size: 35px;
  height: 100px;
  font-weight: 700;
}

.header-para {
  margin: 10px;
}

.calc-body {
  margin-top: 10px;
  display: flex;
  flex-wrap: wrap;
  gap: 5px;
  align-items: flex-end;
  justify-content: flex-end;
}

.btn {
  width: 80px;
  height: 80px;
  background-color: rgba(81, 174, 130, 0.87);
  border: 0;
  border-radius: 40%;
  font-size: 30px;
  font-weight: 600;
  cursor: pointer;
  flex: auto;
}

.btn:hover {
  background-color: rgb(198, 201, 189);
  transition: 0.6s;
}

.operator-btn {
  background-color: rgba(255, 179, 0, 0.87);
}

.delete-btn,
.cancel-btn {
  flex: 160px;
  border-radius: 50%;
}