:root{--bio-navy:#06254e;--bio-accent:#fc1044;--bio-bg:var(--bio-fb-bg,#eef2f7);color-scheme:light}
*{box-sizing:border-box}html,body{margin:0;width:100%;height:100%;overflow:hidden;background:var(--bio-bg);font-family:Inter,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;-webkit-text-size-adjust:100%}body{overscroll-behavior:none}
.bio-viewer{width:100%;height:100%;display:flex;flex-direction:column;background:var(--bio-bg)}
.bio-toolbar{height:38px;flex:0 0 38px;background:var(--bio-navy);display:flex;align-items:center;justify-content:space-between;padding:0 6px;gap:5px}.bio-group{display:flex;align-items:center;gap:4px;min-width:0}
.bio-btn{width:28px;height:28px;padding:0;border:1px solid rgba(255,255,255,.12);border-radius:7px;background:#fff;color:var(--bio-navy);display:inline-flex;align-items:center;justify-content:center;cursor:pointer;text-decoration:none;-webkit-tap-highlight-color:transparent;touch-action:manipulation}.bio-btn:hover{transform:translateY(-1px)}.bio-btn:disabled{opacity:.4;cursor:default;transform:none}.bio-btn svg{width:13px;height:13px;fill:none;stroke:currentColor;stroke-width:2.35;stroke-linecap:round;stroke-linejoin:round}.bio-counter{color:#fff;font-size:13px;line-height:1;font-weight:800;white-space:nowrap;padding:0 4px}.bio-tools{gap:4px}.bio-zoom-level{min-width:38px;color:#fff;font-size:11px;line-height:1;font-weight:800;text-align:center;white-space:nowrap;font-variant-numeric:tabular-nums}
.bio-stage{position:relative;flex:1;min-height:0;width:100%;overflow:hidden;background:var(--bio-bg);outline:0;perspective:1800px;touch-action:pan-y pinch-zoom;overscroll-behavior:none;-webkit-user-select:none;user-select:none}
.bio-book{position:absolute;inset:0;display:flex;align-items:center;justify-content:center;overflow:hidden;perspective:1800px}
.bio-sheet{position:absolute;inset:0;display:flex;align-items:center;justify-content:center;opacity:0;pointer-events:none;backface-visibility:hidden;transform-style:preserve-3d;padding:8px}.bio-sheet.current{opacity:1;z-index:3;pointer-events:auto}.bio-sheet.incoming{opacity:1;z-index:2}.bio-sheet canvas{display:block;max-width:100%;max-height:100%;width:auto;height:auto;background:#fff;box-shadow:0 10px 28px rgba(6,37,78,.12);pointer-events:none;user-select:none;transform-origin:center center;will-change:transform;backface-visibility:hidden}.bio-stage:not(.bio-zoomed){cursor:zoom-in}.bio-stage.bio-zoomed{cursor:grab}.bio-stage.bio-zoomed:active{cursor:grabbing}
.bio-sheet.turn-next{z-index:5;transform-origin:left center;animation:bioTurnNext .36s cubic-bezier(.55,.06,.68,.19) forwards}.bio-sheet.turn-prev{z-index:5;transform-origin:right center;animation:bioTurnPrev .36s cubic-bezier(.55,.06,.68,.19) forwards}
@keyframes bioTurnNext{0%{transform:rotateY(0) translateZ(0);opacity:1;filter:brightness(1)}55%{filter:brightness(.86)}100%{transform:rotateY(-86deg) translateZ(0);opacity:.05;filter:brightness(.7)}}
@keyframes bioTurnPrev{0%{transform:rotateY(0) translateZ(0);opacity:1;filter:brightness(1)}55%{filter:brightness(.86)}100%{transform:rotateY(86deg) translateZ(0);opacity:.05;filter:brightness(.7)}}
.bio-side-nav{position:absolute;top:50%;z-index:14;width:46px;height:58px;margin:0;padding:0;border:1px solid rgba(6,37,78,.12);border-radius:14px;background:rgba(255,255,255,.94);color:var(--bio-navy);display:flex;align-items:center;justify-content:center;cursor:pointer;box-shadow:0 8px 24px rgba(6,37,78,.18);transform:translateY(-50%);transition:transform .18s ease,opacity .18s ease,background .18s ease;backdrop-filter:blur(5px);-webkit-backdrop-filter:blur(5px);touch-action:manipulation;-webkit-tap-highlight-color:transparent}.bio-side-prev{left:10px}.bio-side-next{right:10px}.bio-side-nav:hover{background:#fff;transform:translateY(-50%) scale(1.045)}.bio-side-nav:disabled{opacity:.28;cursor:default;transform:translateY(-50%)}.bio-side-nav svg{width:23px;height:23px;fill:none;stroke:currentColor;stroke-width:2.35;stroke-linecap:round;stroke-linejoin:round}
.bio-loading{position:absolute;inset:0;z-index:20;display:flex;align-items:center;justify-content:center;flex-direction:column;gap:10px;background:rgba(238,242,247,.92);color:#263a56;text-align:center;padding:18px}.bio-loading[hidden]{display:none}.bio-spinner{width:31px;height:31px;border:4px solid #ccdaec;border-top-color:#204d95;border-radius:50%;animation:bioSpin .8s linear infinite}@keyframes bioSpin{to{transform:rotate(360deg)}}.bio-loading strong{font-size:14px}
.bio-error{position:absolute;inset:0;z-index:25;display:none;align-items:center;justify-content:center;flex-direction:column;gap:10px;background:var(--bio-bg);padding:20px;text-align:center;color:#263a56}.bio-error.show{display:flex}.bio-error strong{font-size:16px}.bio-error p{margin:0;max-width:500px;font-size:13px;line-height:1.5}.bio-error-actions{display:flex;gap:8px;flex-wrap:wrap;justify-content:center}.bio-action{display:inline-flex;align-items:center;gap:6px;border:0;border-radius:8px;padding:9px 11px;background:var(--bio-navy);color:#fff;font-weight:750;text-decoration:none;cursor:pointer;font-size:13px}.bio-action svg{width:15px;height:15px;fill:none;stroke:currentColor;stroke-width:2.2;stroke-linecap:round;stroke-linejoin:round}
.bio-pseudo-full{position:fixed!important;inset:0!important;z-index:2147483646!important;background:var(--bio-bg)!important}
@media(max-width:767px){.bio-side-nav{width:40px;height:50px;border-radius:12px}.bio-side-prev{left:5px}.bio-side-next{right:5px}.bio-side-nav svg{width:20px;height:20px}.bio-toolbar{height:36px;flex-basis:36px;padding:0 max(5px,env(safe-area-inset-right)) 0 max(5px,env(safe-area-inset-left))}.bio-btn{width:27px;height:27px;border-radius:6px}.bio-btn svg{width:12px;height:12px}.bio-counter{font-size:12px;padding:0 2px}.bio-zoom-level{min-width:34px;font-size:10px}.bio-sheet{padding:4px}.bio-sheet canvas{max-width:calc(100% - 2px);max-height:calc(100% - 2px);box-shadow:0 7px 20px rgba(6,37,78,.1)}}

@media(max-width:360px){.bio-zoom-level{display:none}.bio-tools{gap:3px}}