/* アニメーション用マスク */

.animation_mask {
	overflow: hidden;
    position: relative;
    animation: mask_opacity 1s cubic-bezier(.4, 0, .2, 1);
}

.animation_mask:before {
    position: absolute;
    top: 0;
    right: 0;
    bottom: 0;
    left: 0;
    z-index: 1;
    content: "";
    background: #fff;

    animation: mask-animation 1s cubic-bezier(.4, 0, .2, 1) forwards;
    pointer-events: none;
}


@keyframes mask_opacity {
    0% {
        opacity: 0;
    }
}

@keyframes mask-animation {
    100% {
        transform: translateX(100%);
    }
}

/* ==========================================================================
   Helper classes
   ========================================================================== */

.hidden {
    display: none !important;
}

.sr-only {
    position: absolute;
    margin: -1px;
    padding: 0;
    width: 1px;
    height: 1px;
    border: 0;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    /* 1 */
}

.sr-only.focusable:active,
.sr-only.focusable:focus {
    position: static;
    margin: 0;
    width: auto;
    height: auto;
    overflow: visible;
    clip: auto;
    white-space: inherit;
}

.invisible {
    visibility: hidden;
}