style.css

@import url("https://fonts.googleapis.com/css2?family=Poppins:wght@200;300;400;500;600;700&display=swap");

* {
  box-sizing: border-box;
  font-family: "Poppins", sans-serif;
  margin: 0;
  padding: 0;
  font-size: 18px; 
}

.logo{
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 10px;
  font-size: 1.8rem; 
}

main {
  height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
}

.container {
  border-radius: 14px;
  padding: 20px;
  border: 3px solid #121212;
}

.calculator-button {
  height: 50px;
  width: 50px;
  border-radius: 10px;
  cursor: pointer;
  margin: 2px;
  background-color: #FFFFFF;
  display: flex;
  align-items: center;
  justify-content: center;
}

.equal-btn {
  background-color: rgb(254, 160, 10);
  color: #FFFFFF;
}

section > div {
  display: flex;
}