.myTextBoxArea {
    height: -webkit-fill-available;
    width: -webkit-fill-available;
}

.myTextBoxArea {
    height: -webkit-fill-available;
    width: -webkit-fill-available;
}

mytextboxarea.myTextBoxArea-can-copy {
    position: relative;
    display: block;
}

    mytextboxarea.myTextBoxArea-can-copy > .myTextBoxArea {
        width: 100%;
        box-sizing: border-box;
        /* Le texte ne passe pas sous le bouton. */
        padding-right: 2.4rem;
        padding-bottom: 2.1rem;
    }

.myTextBoxArea-copy {
    position: absolute;
    right: 1.4rem;
    top: 0.4rem;
    width: 1.8rem;
    height: 1.8rem;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0;
    border: 0;
    border-radius: 0.3rem;
    background: rgba(255, 255, 255, 0.9);
    color: #555;
    cursor: pointer;
    z-index: 2;
}

    .myTextBoxArea-copy:hover {
        background: #fff;
        color: #111;
    }

    .myTextBoxArea-copy.copy-success {
        color: #198754;
    }

    .myTextBoxArea-copy.copy-error {
        color: #dc3545;
    }

mytextboxarea.myTextBoxArea-can-copy > .myTextBoxArea-copy {
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
    transition: opacity 120ms ease, visibility 120ms ease;
}

mytextboxarea.myTextBoxArea-can-copy:hover > .myTextBoxArea-copy,
mytextboxarea.myTextBoxArea-can-copy:focus-within > .myTextBoxArea-copy {
    opacity: 1;
    visibility: visible;
    pointer-events: auto;
}

@media (hover: none) {
    mytextboxarea.myTextBoxArea-can-copy > .myTextBoxArea-copy {
        opacity: 1;
        visibility: visible;
        pointer-events: auto;
    }
}

mytextboxarea > .myTextBoxArea-copy[hidden] {
    display: none !important;
}