.overlay {
display: none;
width: 100%;
height: 100%;
background: rgba(0,0,0,0.6);
position: fixed;
z-index: 1
}
.btn_area {
width: 400px;
height: 250px;
position: absolute;
top: 50%;
left: 50%;
transform: translate(-50%,-50%);
background: #fff;
text-align: center;
z-index: 2
}
.btn_area .ttl {
font-weight: bold
}
.btn_area p {
padding: 15px
}
.btn_area button {
display: block;
margin: 0 auto;
background: #333;
color: #fff;
padding: 20px 40px;
border: none
}
.btn_area button:hover {
background: #777
}
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