wagtail/client/scss/components/_comments-controls.scss

.comments-controls {
    position: relative;
    display: flex;
    justify-content: flex-end;
    padding-right: 2px;
    height: 42px;
    box-sizing: border-box;

    @include media-breakpoint-up(sm) {
        padding-right: 30px;
        height: 43px;
    }
}

.comments-toggle {
    $root: &;
    float: none;
    position: relative;
    cursor: pointer;
    display: flex;
    width: auto;
    align-items: center;

    // Wagtail adds some top padding to labels on mobile
    padding: 0;

    &--active,
    &:hover {
        #{$root}__label {
            opacity: 1;
        }

        #{$root}__icon {
            color: $color-white;
        }
    }

    &__icon {
        position: absolute;
        left: -12px;
        bottom: 3px;
        width: 52px;
        height: 52px;
        color: $color-teal-dark;
        transition: color 100ms cubic-bezier(0.4, 0, 0.2, 1);
    }

    &__count {
        position: absolute;
        top: -1px;
        right: -8px;
        width: 19px;
        height: 19px;
        box-sizing: border-box;
        border-radius: 50%;
        background-color: $color-salmon;
        border: 1px solid $color-teal;
        color: $color-white;
        font-size: 9px;
        font-weight: 700;
        text-align: center;
        line-height: 17px;

        &:empty {
            display: none;
        }
    }

    &__icon-wrapper {
        width: 28px;
        height: 52px;
        position: relative;
    }

    &__label {
        font-size: 12px;
        text-transform: uppercase;
        color: $color-white;
        font-weight: 400;
        margin-right: 10px;
        opacity: 0;
        pointer-events: none;
        transition: opacity 100ms cubic-bezier(0.4, 0, 0.2, 1);
    }

    [type=checkbox] {
        position: absolute;
        opacity: 0;
        pointer-events: none;
        top: -20px;
    }

    [type=checkbox]:checked + &__icon {
        opacity: 1;
    }
}

.comment-notifications-toggle {
    label {
        padding: 0;
        margin: 0;
        padding-top: 5px;
        font-weight: normal;
        font-size: 13px;
        color: $color-white;
        display: flex;
        justify-content: space-between;
    }

    .switch__toggle {
        margin-left: 15px;
    }
}