.flipbook-header{position:sticky;top:0;z-index:30;display:flex;align-items:center;justify-content:space-between;padding:10px 16px;background:rgba(11,26,85,.92);backdrop-filter:blur(12px);border-bottom:1px solid rgba(255,255,255,.1);color:white;transition:opacity .3s ease,transform .3s ease}.flipbook-header.flipbook-header-hidden{opacity:0;pointer-events:none;transform:translateY(-100%)}.flipbook-header-left{display:flex;align-items:center;gap:10px}.flipbook-header-right{display:flex;align-items:center;gap:12px;font-size:13px;color:rgba(255,255,255,.7)}.flipbook-back-btn{display:flex;align-items:center;justify-content:center;width:36px;height:36px;border-radius:8px;border:1px solid rgba(255,255,255,.2);background:none;color:white;cursor:pointer;transition:border-color .2s,background .2s}.flipbook-back-btn:hover{border-color:rgba(255,255,255,.4);background:rgba(255,255,255,.1)}.flipbook-fullscreen-btn{display:flex;align-items:center;gap:6px;padding:6px 12px;border-radius:8px;border:1px solid rgba(255,255,255,.2);background:none;color:white;cursor:pointer;font-size:13px;transition:border-color .2s,background .2s}.flipbook-fullscreen-btn:hover{border-color:rgba(255,255,255,.4);background:rgba(255,255,255,.1)}.flipbook-desktop{display:flex;align-items:center;justify-content:center;height:calc(100vh - 57px);height:calc(100dvh - 57px);background:#1a1a2e;user-select:none;padding:16px}.flipbook-spread{display:flex;width:min(calc(100vw - 32px),1200px,calc((100dvh - 57px - 32px) * 3 / 2));aspect-ratio:3/2;box-shadow:0 20px 60px rgba(0,0,0,.4),0 0 0 1px rgba(255,255,255,.05);border-radius:4px}.flipbook-page,.flipbook-spread{position:relative;overflow:hidden}.flipbook-page{flex:1;background:#f5f0e8}.flipbook-page-left{border-right:1px solid rgba(0,0,0,.15);box-shadow:inset -8px 0 16px -8px rgba(0,0,0,.12)}.flipbook-page-right{box-shadow:inset 8px 0 16px -8px rgba(0,0,0,.12)}.flipbook-page img{display:block;width:100%;height:100%;object-fit:contain}.flipbook-page-placeholder{display:flex;align-items:center;justify-content:center;width:100%;height:100%;background:#e8e0d4;color:#8a7e6e;font-size:14px}.flipbook-nav-zone{position:absolute;top:0;bottom:0;width:15%;cursor:pointer;z-index:5;display:flex;align-items:center;opacity:0;transition:opacity .2s;border:none;background:none;padding:0}.flipbook-nav-zone:hover{opacity:1}.flipbook-nav-zone-left{left:0;justify-content:flex-start;padding-left:16px;background:linear-gradient(90deg,rgba(0,0,0,.08),transparent)}.flipbook-nav-zone-right{right:0;justify-content:flex-end;padding-right:16px;background:linear-gradient(270deg,rgba(0,0,0,.08),transparent)}.flipbook-nav-arrow{width:40px;height:40px;border-radius:50%;background:rgba(255,255,255,.9);color:#333;box-shadow:0 2px 8px rgba(0,0,0,.15)}.flipbook-mobile,.flipbook-nav-arrow{display:flex;align-items:center;justify-content:center}.flipbook-mobile{position:relative;height:calc(100vh - 57px);height:calc(100dvh - 57px);background:#1a1a2e;user-select:none;padding:16px}.flipbook-mobile-page{display:flex;align-items:center;justify-content:center;width:min(calc(100vw - 32px),600px,calc((100dvh - 57px - 32px) * 3 / 4));aspect-ratio:3/4;background:#f5f0e8;border-radius:4px;overflow:hidden;box-shadow:0 20px 60px rgba(0,0,0,.4),0 0 0 1px rgba(255,255,255,.05)}.flipbook-mobile-page img{display:block;width:100%;height:100%;object-fit:contain}