.calc_container {
    display: flex;
    align-items: center;
    flex-direction: column;
    margin: 10px;
}

#calculator {
    background-color: #555;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans", sans-serif, "Apple Color Emoji", "Segoe UI Emoji", "Segoe UI Symbol", "Noto Color Emoji";
    padding: 20px;
    max-width: 400px;
    flex: 1;
    width: 100%; /* only for if it's a flex item */
    box-sizing: border-box;
    overflow: hidden;
    box-sizing: border-box;
    border-radius: 16px;
}

/* note: used to be '.buttons.mobile'; making it global style for now */
#calculator .buttons {
    display: grid;
    gap: 10px;
    grid-template-columns: repeat(4, 1fr);
    /* 4 columns, each takes an equal fraction of the width */
    grid-auto-rows: 1fr;

}

#calculator .button {
    /* font-family: 'Roboto', 'Noto Sans', Arial, sans-serif; */
    font-size: 1.5rem;
    color: #d0d0d0;
    display: flex;
    justify-content: center;
    align-items: center;

    -webkit-user-select: none;
    -moz-user-select: none;
    -ms-user-select: none;
    user-select: none;

    padding: 0;
    box-sizing: content-box;

    border: 1px solid transparent;
    /* border-radius: 8px; */
    aspect-ratio: 1 / 1; /* Enforce 1:1 width-to-height ratio */
    border-radius: 50%; /* Make buttons circular */

}


#calculator .control.button {
    background-color: #a44;
}
#calculator .button.digit,
#calculator .button.operand {
    background-color: #222;
}
#calculator .button.control:active {
    background-color: #722;
}
#calculator .button.digit:active,
#calculator .button.operand:active {
    background-color: #000;
}

/* ----------------------------- */
/* ---- output area ---- */
#calculator #outputArea {
    color: #d0d0d0;
    border: 4px solid transparent;
    border-radius: 4px;
    font-size: 2.5rem;
    background-color: #444;
    height: 80px;
    margin-bottom: 10px;
    text-align: right;

    display: -webkit-box;
    line-clamp: 3;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
    text-overflow: ellipsis;
}

#calculator #outputArea.soft{
    color: #d0d0d040;
}
/* ----------------------------- */

/* ----------------------------- */
/* ---- input area ---- */
#calculator #inputArea {
    border: 4px solid transparent;
    font-size: 2rem;
    border-radius: 4px;
    background-color: #888;
    height: 4rem;
    margin-bottom: 10px;
    display: block;
    width: 100%;
    text-align: right;
    box-sizing: border-box;
    color: white;
    text-align: right;
    word-wrap: none;
}
#calculator #inputArea:focus {
    outline: none;
}
/* ----------------------------- */