/* Tranche éditoriale : épaisseur visuelle calibrée pour 58 pages. */
.cover-book{display:flex;aspect-ratio:auto;transform-style:preserve-3d;overflow:visible}.book-block{position:relative;height:100%;aspect-ratio:2/3;transform:translateZ(2px)}.cover-book .book-block img{display:block;height:100%;width:100%;object-fit:cover;border-radius:0 10px 10px 0;border-right:0;box-shadow:inset 8px 0 13px #000b}.book-spine{width:34px;height:100%;flex:0 0 34px;position:relative;display:flex;align-items:center;justify-content:center;background:linear-gradient(90deg,#020303,#17130e 42%,#080706 82%,#020202);border:1px solid #8d692d;border-right:0;border-radius:7px 0 0 7px;box-shadow:inset 3px 0 5px #000,inset -3px 0 5px #000,0 1px 0 #d5ad5b;overflow:hidden}.book-spine:before,.book-spine:after{content:"";position:absolute;left:4px;right:4px;height:1px;background:linear-gradient(90deg,transparent,#d3a950,transparent)}.book-spine:before{top:18px}.book-spine:after{bottom:18px}.book-spine strong,.book-spine span,.book-spine small{position:absolute;writing-mode:vertical-rl;transform:rotate(180deg);color:#d5b16b;white-space:nowrap;text-shadow:0 1px 2px #000}.book-spine strong{top:8%;font-size:14px;letter-spacing:.22em}.book-spine span{top:34%;font-size:7px;letter-spacing:.13em;color:#c7a465}.book-spine small{bottom:7%;font-size:6px;letter-spacing:.16em}.page-edges{position:absolute;right:-7px;top:9px;bottom:9px;width:8px;border-radius:0 4px 4px 0;background:repeating-linear-gradient(0deg,#e5dcc8 0 1px,#9f9583 1px 2px);box-shadow:2px 0 6px #0008;z-index:-1}@media(max-width:700px){.book-spine{width:26px;flex-basis:26px}.book-spine strong{font-size:11px}.book-spine span{font-size:5px}.book-spine small{font-size:5px}}