body{
    font-family: Arial, Helvetica, sans-serif;
    margin: 0px;
    display: flex;
    justify-content: center;
    align-items: center;
}

.calculator {
    height: auto;
    width: auto;
    background-color: black;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding-bottom: 40px;
}

#display {
    color: white;
    font-weight: bolder;
    padding: 25px;
    margin-bottom: 30px;
    width: auto;
    overflow: hidden;
    font-size: 3rem;
    border: none;
    background-color: rgb(60, 60, 60);
    text-align: right;
}

.keypad {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
}

button {
    font-weight: bolder;
    color: white;
    font-size: 2em;
    height: 100px;
    width: 100px;
    border: none;
    margin: 15px;
    background-color: #d8863b;
    border-radius: 25%;
    cursor: pointer;
}

button:hover {
    background-color: #f3b479;
}

.numkeys {
    background-color: rgb(80, 78, 78);
}

.numkeys:hover {
    background-color: rgb(151, 145, 145);
}

button:active {
    background-color: white;
    color: black;
}

#history {
    margin-top: 50px;
    height: inherit;
    width: auto;
    border-radius: 15px;
    padding: 20px;
    font-size: 2em;
}

#history-display {
    background-color: whitesmoke;
    display: flex;
    flex-direction: column;
    position: fixed;
    right: 0px;
    top: 0px;
    display: none;
    z-index: 1;
    height: 100%;
    width: 40%;
}

#cross {
    color: black;
    background-color: whitesmoke;
    right: 0px;
}

#history-list {
    margin: 15px;
    display: flex;
    flex-direction: column;
    width: 100%;
    overflow-y: scroll;
    overflow-x: hidden;
}

#history-tab {
    padding: 15px;
    padding-left: 40px;
    padding-right: 40px;
    width: 80%;
    background-color: lightblue;
    display: flex;
    font-size: 3em;
    justify-content: space-between;
    align-items: center;
    border-radius: 25px;
    margin: 15px;
}

#history-add{
    font-size: 0.5em;
    height: auto;
    width: auto;
    padding: 10px;
    border-radius: 10px;

}