.easyel-reading-progress-bar {
    position: absolute;
    left: 0;
    top: 0;
    width: 100%;
    height: 4px;
    appearance: none;
    -webkit-appearance: none;
    -moz-appearance: none;
    border: none;
    background: transparent;
    z-index: 9999999;
    transition: opacity 0.2s ease;
}

.easyel-reading-progress-bar::-webkit-progress-bar {
    background-color: transparent;
}

.easyel-reading-progress-bar::-webkit-progress-value {
    background-color: var(--easyel-progress-color);
}

.easyel-reading-progress-bar::-moz-progress-bar {
    background-color: var(--easyel-progress-color);
}

.easyel-progress-wrapper {
    position: fixed;
    left: 0;
    width: 100%;
    height: 4px;
    z-index: 9999999;
}