* {
    margin: 0;
    padding: 0;
    user-select: none;
}

body {
    background-color: rgb(83, 83, 83);
    display: flex;
    justify-content: center;
    align-items: center;
    flex-direction: column;
}

button {
    width: 50px;
    height: 50px;
    border-radius: 50%;
    border: none;
    background-color: rgb(59, 59, 59);
    color: white;
    font-size: 2rem;
    cursor: pointer;
}

.btn-div {
    display: flex;
    gap: 2rem;
}

.bg-black {
    background-color: rgb(0, 0, 0);
}

#keys {
    /* display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 1rem;
    padding: 2rem; */

    display: flex;
    flex-direction: column;
    gap: 1rem;
    justify-content: center;
    align-items: center;
    padding-top: 2rem;
}

#calculator {
    background-color: rgb(255, 255, 255);
    padding: 2rem;
    margin: 2rem;
    border-radius: 15px;
    display: flex;
    justify-content: center;
    flex-direction: column;
    align-items: center;
}

#display {
    border-radius: 15px;
    /* width: 50dvw; */
    padding: 15px;
    border: none;
    background-color: rgb(255, 255, 255);
    color: rgb(0, 0, 0);
    font-size: 1.5rem;
    border: 2px solid black;
}

#history-container {
    color: rgb(0, 0, 0);
    padding-top: 1.5rem;
}

#history-container>h3 {
    text-decoration: 1px solid rgb(0, 0, 0) underline;
    text-underline-offset: .5rem;

}

#history-list>li {
    padding-top: 1rem;
}

.hidden {
    display: none;
}


.small-font {
    font-size: larger !important;
}