* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  font-family: "Segoe UI", Roboto, sans-serif;
  min-height: 100vh;
  display: flex;
  justify-content: center;
  align-items: center;
  background: rgb(20, 138, 255);
  color: white;
}

#calculator {
  max-width: 25rem;
  width: 100%;
  margin: auto;
}

.display {
  width: 100%;
  display: block;
  min-height: 100%;
  box-sizing: border-box;
  padding: 1rem;
  margin-bottom: 0.8rem;
  background-color: rgb(171, 174, 174);
  text-align: right;
  font-size: 1.6rem;
}

.buttons {
  display: grid;
  width: 100%;
  justify-items: stretch;
  grid-template-columns: repeat(4, 1fr);
  gap: 0.5rem;
  border: none;
  color: gray;
  margin: auto;
  text-align: center;
  text-decoration: none;
}

.clear_entry,
.clear,
.delete,
.percent,
.operator,
.equal,
.numbers {
  width: 100%;
  padding: 0.8rem;
  box-sizing: border-box;
  border: none;
  background-color: white;
  color: black;
  cursor: pointer;
  transition: background-color 0.3s ease;
  font-size: 1.5rem;
}


/*Responsiveness*/