.pd-preview-root--book{padding:8px;align-items:center}.pd-preview-sheet--book{display:flex;flex-direction:column;height:calc(100dvh - 16px);width:min(94vw,620px);max-height:none;max-width:620px}.pd-preview-sheet--book .pd-preview-sheet__head{padding:12px 14px;flex:none}.pd-preview-sheet--book .pd-preview-sheet__title{font-size:1.05rem}.pd-preview-sheet__body--book{padding:0 10px;overflow:hidden;display:flex;flex-direction:column;flex:1;min-height:0}.pd-preview-sheet--book .pd-preview-sheet__foot{padding:10px 14px 12px;flex:none}.pd-preview-sheet__actions--book{flex-wrap:wrap;gap:8px}.bk-flip{display:flex;flex-direction:column;flex:1;min-height:0;width:100%;background:var(--color-bg);color:var(--color-text)}.bk-flip__status{margin:auto;padding:48px 20px;text-align:center;font-size:14px;color:var(--color-text-2)}.bk-flip__toolbar{display:flex;align-items:center;justify-content:space-between;gap:12px;padding:6px 0 8px;flex:none}.bk-flip__label{font-family:var(--font-mono),monospace;font-size:11px;letter-spacing:.08em;text-transform:uppercase;color:var(--color-text-3)}.bk-flip__zoom{display:inline-flex;align-items:center;gap:4px}.bk-flip__zoom-btn,.bk-flip__zoom-label{min-width:44px;min-height:44px;border:1px solid var(--color-line);border-radius:8px;background:var(--color-bg);color:var(--color-text);font-family:var(--font-mono),monospace;font-size:12px;cursor:pointer}.bk-flip__zoom-label{min-width:64px;letter-spacing:.04em}.bk-flip__zoom-btn:hover:not(:disabled),.bk-flip__zoom-label:hover{border-color:var(--color-text-3)}.bk-flip__zoom-btn:disabled{opacity:.35;cursor:not-allowed}.bk-flip__stage{position:relative;flex:1;min-height:0;width:100%;aspect-ratio:var(--bk-aspect,.72);display:flex;align-items:center;justify-content:center;overflow:hidden;perspective:1600px;background:#fff;box-shadow:0 12px 40px rgba(0,0,0,.12),0 0 0 1px var(--color-line)}.bk-flip__stage--pan{cursor:grab}.bk-flip__stage--pan:active{cursor:grabbing}.bk-flip__page{position:relative;width:100%;height:100%;transform-style:preserve-3d}.bk-flip__sheet{display:flex;align-items:center;justify-content:center;width:100%;height:100%}.bk-flip__page--flip-next{animation:bk-flip-next .56s ease forwards}.bk-flip__page--flip-prev{animation:bk-flip-prev .56s ease forwards}@keyframes bk-flip-next{0%{transform:rotateY(0deg) translateX(0);opacity:1}45%{transform:rotateY(-78deg) translateX(-8%);opacity:.35}to{transform:rotateY(0deg) translateX(0);opacity:1}}@keyframes bk-flip-prev{0%{transform:rotateY(0deg) translateX(0);opacity:1}45%{transform:rotateY(78deg) translateX(8%);opacity:.35}to{transform:rotateY(0deg) translateX(0);opacity:1}}.bk-flip__canvas{display:block;width:100%;height:100%;background:#fff}.bk-flip__nav{display:grid;grid-template-columns:1fr auto 1fr;align-items:center;gap:10px;width:100%;padding:10px 0 4px;flex:none}.bk-flip__nav-btn{min-height:44px;padding:0 14px;border:1px solid var(--color-line);border-radius:8px;background:var(--color-bg);color:var(--color-text);font-family:var(--font-mono),monospace;font-size:12px;letter-spacing:.04em;cursor:pointer}.bk-flip__nav-btn:first-child{justify-self:start}.bk-flip__nav-btn:last-child{justify-self:end}.bk-flip__nav-btn:hover:not(:disabled){border-color:var(--color-text-3);color:var(--color-red)}.bk-flip__nav-btn:disabled{opacity:.35;cursor:not-allowed}.bk-flip__nav-count{font-family:var(--font-mono),monospace;font-size:11px;letter-spacing:.06em;text-transform:uppercase;white-space:nowrap}.bk-flip__hint,.bk-flip__nav-count{color:var(--color-text-3);text-align:center}.bk-flip__hint{margin:0;padding:4px 0 0;font-size:12px;line-height:1.45;flex:none}@media (max-width:719px){.pd-preview-root--book{padding:6px}.pd-preview-sheet--book{height:calc(100dvh - 12px);width:min(96vw,560px);max-width:560px}.bk-flip__nav{grid-template-columns:1fr 1fr;grid-template-rows:auto auto}.bk-flip__nav-count{grid-column:1/-1;order:-1;padding-bottom:4px}.bk-flip__nav-btn:first-child,.bk-flip__nav-btn:last-child{justify-self:stretch}}@media (prefers-reduced-motion:reduce){.bk-flip__page--flip-next,.bk-flip__page--flip-prev{animation:none}}