.orbitron-font {
  font-family: "Orbitron", sans-serif;
  font-optical-sizing: auto;
  font-weight: 400;
  font-style: normal;
}
body {
    box-sizing: border-box;
    margin: 0;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    font-family: sans-serif;
    /* background-color: darkslategray;  */
}
#heading {
    font-weight: 900;
    font-size: xx-large;
    margin-bottom: 0;
}
#container {
    display: flex;
    flex-direction: column;
    border: 2px solid black;
    width: 350px;
    height: 550px;
    padding: 20px;
    margin-top: 30px;
    background-color: #001524;
}
.display {
    display: flex;
    justify-content: flex-end;
    align-items: flex-end;
    background-color: rgb(237, 245, 201);
    height: 80px;
    margin-bottom: 20px;
    padding: 7px;
    font-size: 50px;
    font-weight: 600;
    font-family: "Orbitron";
}
.button-container {
    display: flex;
    flex-direction: row;
    justify-content: center;;
    flex-wrap: wrap;
    gap: 7px 7px;
    font-weight: 700;
    font-size: x-large;
}
.operator {
    background-color: #FF7D00;
    color: white;
}
.button {
    display: flex;
    width: 80px;
    height: 80px;
    justify-content: center;
    align-items: center;
    border-radius: 10%;
    cursor: default;
}
.clear {
    display: flex; 
    background-color: #FFECD1;
    color: black;
    width: 165px;
    border-radius: 5%;
}
.clear:active {
    background-color: #fabc65;
}
.backspace {
    display: flex;
    background-color: #78290F;
    width: 165px;
    color: white;
    border-radius: 5%;
}
.backspace:active {
    background-color: #c55b37;
}
.number {
    background-color: #15616D;
    color: white;
}
.number:active {
    background-color: #2ac1d8;
    color: white;
}
.operator:active {
    background-color: #ffb978;
    color: white;
}