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

body {
  background-color: #ededed;
  display: flex;
  justify-content: center;
  align-items: center;
  height: 100vh;
  font-family: "Inter", sans-serif;
}

.calculator {
  width: 365px;
  height: auto;
  background-color: #1c1c1c;
  display: flex;
  justify-content: center;
  align-items: center;
  flex-direction: column;
  padding: 30px 15px;
  border-radius: 10px;
}

.expression-container {
  background-color: #505050;
  margin-bottom: 20px;
  width: 335px;
  height: 60px;
  padding: 10px;
  display: flex;
  justify-content: flex-end;
  align-items: center;
  font-size: 30px;
  border: none;
  color: #d4d4d2;
  overflow-x: auto;
  white-space: nowrap;
  border-radius: 5px;
}

.button-container {
  display: flex;
  flex-wrap: wrap;
  gap: 5px;
}

button {
  width: 80px;
  height: 80px;
  background-color: #505050;
  font-size: 18px;
  border-radius: 50%;
  border: none;
  color: white;
}

.operand-buttons {
  background-color: #ff9500;
}

.top-buttons {
  background-color: #d4d4d4;
}