.bookbg{
	background:linear-gradient(90deg, #a9feef, #93dec5);
}
/*color*/
    .book__model::before{
      background:linear-gradient(180deg, #1b3b28, #28613f);
    }

    .cover{
      background: linear-gradient(135deg, rgba(255,255,255,.06), rgba(0,0,0,.12)),
                  linear-gradient(180deg, #1b3b28, #28613f);
    }

    .spine{
      background:
        linear-gradient(60deg, rgba(255,255,255,.26), rgba(255,255,255,0) 28%),
        linear-gradient(180deg, #5abf84, #206b3f);
    }
/*書間距*/
    .shelf{
      gap: 100px; 
      transform-style:preserve-3d;
      padding-right: 100px;
	  padding-bottom:40px; 
    }

.float-title{
	white-space: normal;
    height: 140%;
}