.viewport {
    width: 320px;
    overflow: hidden;
    margin: 0 auto;
    -webkit-transform: translateZ(0); /* Optional: When heavy at iOS6+ */
}

.flipsnap {
    width: 960px; /* 320px(item width) * 3(item count) */
}
.flipsnap:after {
    content: '';
    display: block;
    clear: both;
    height: 0;
}

.item {
    float: left;
    width: 310px;
    font-size: 50px;
    text-align: center;
    padding: 50px 0;
    background: #EFEFEF;
    border: 5px solid #999;
    color: #666;
}

/* ここからオリジナル */
.flipsnap {
    width: 405px;
}
.item {
	cursor: pointer;
    float: left;
    width: 100%;
	margin-left: 5px;
    font-size: inherit;
    text-align: center;
    padding: 0;
    background: none;
    border: none;
    color: inherit;
}
.item:first-child {
	margin-left: 0px;
}


.flipsnap {
	width: 100%;
}
.item {
	cursor: pointer;
    float: left;
	margin-left: 0px;
    font-size: inherit;
    text-align: center;
    padding: 0;
    background: none;
    border: none;
    color: inherit;
}
.btn_box {
	margin: 0 auto;
	position: relative;
	z-index: 1;
}
.btn_box button:disabled {
	display: none;
}
.btn_box button {
	position: absolute;
	z-index: 1;
	background: none;
	border: none;
	cursor: pointer;
}
.btn_box button.prev {
	left: 3px;
}
.btn_box button.next {
}
.flipsnap:after {
    display: inline-block;
    clear: both;
    height: auto;
}