style.css

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

.calc-container {
    width: 550px;
    height: 70%;
    display: flex;
    flex-direction: column;
    background-color: rgb(52, 52, 75);;
}

.display {
    display: flex;
    height: 20%;
    background: rgb(49, 47, 47);
    color: white;
    font-size: 20px;
    align-items: center;
    padding-left: 50px;
}

.buttons .line {
    display: flex;
    justify-content: space-between; /* Align buttons evenly within each line */
  }
  
  .buttons .line > button {
    flex-grow: 1; /* Allow buttons to expand and fill the available space */
    background-color: rgb(34, 34, 44);
    height: 100%;
  }

.buttons {
    flex-grow: 5;
}

.line { 
    height: 20%;
}

.line>button {
    background-color: brown;
    width: 24%;
    height: 95%;
    color: white;
    border: solid 2px rgb(52, 52, 75);
    font-size: 20px;
    display: flex;
    justify-content: center;
    align-items: center;
}

#button-clear {
    background-color: rgb(52, 52, 75);;
}

#clear {
    color: orangered;
    border: solid 2px white;
    width: 90px;
    height: 90px;
    display: flex;
    justify-content: center;
    align-items: center;
    border-radius: 50%;
    background-color: white;
}