/* =====================================================================
   PROMO KATALOG — 3D REAL FLIPBOOK (StPageFlip)
   File   : css/promokatalog.css
   Engine : StPageFlip (page-flip) + custom premium UI
   Author : Samudra Supermarket
   ---------------------------------------------------------------------
   Sections:
   1.  Variables & Theme
   2.  Section / Stage backdrop (ambient + spotlight)
   3.  Scene & floating book (3D, glow, ground shadow)
   4.  StPageFlip overrides (crisp pages, gloss, spine)
   5.  Top bar (counter, progress, theme/present)
   6.  Bottom toolbar (glassmorphism, buttons, ripple, tooltip)
   7.  Thumbnail sidebar
   8.  Table of Contents modal
   9.  Search modal
   10. Zoom overlay
   11. Loading (spinner, progress, skeleton)
   12. Snackbar / watermark / logo corner
   13. Animations
   14. Responsive (desktop / tablet / mobile)
   ===================================================================== */

/* ============ 1. VARIABLES & THEME ============ */
.fb-section{
  --fb-bg-1:#1c1f27;
  --fb-bg-2:#0c0e14;
  --fb-ambient:rgba(0,120,210,.20);
  --fb-spot:rgba(120,190,255,.16);
  --fb-glass:rgba(255,255,255,.07);
  --fb-glass-2:rgba(255,255,255,.12);
  --fb-border:rgba(255,255,255,.12);
  --fb-text:#eef2f8;
  --fb-text-dim:#9aa6bd;
  --fb-accent:#00a8e8;
  --fb-accent-2:#0F3193;
  --fb-accent-grad:linear-gradient(135deg,#0F3193,#00a8e8);
  --fb-radius:16px;
  --fb-shadow:0 24px 60px rgba(0,0,0,.55);
  --fb-book-shadow:0 40px 90px rgba(0,0,0,.6);
  position:relative;
  background:radial-gradient(120% 120% at 50% 0%,var(--fb-bg-1) 0%,var(--fb-bg-2) 70%);
  color:var(--fb-text);
  overflow:hidden;
  isolation:isolate;
}
/* Light theme variant (default on load) — white background */
.fb-section.fb-light{
  --fb-bg-1:#ffffff;
  --fb-bg-2:#f3f6fc;
  --fb-ambient:rgba(0,86,179,.10);
  --fb-spot:rgba(0,168,232,.12);
  --fb-glass:rgba(255,255,255,.65);
  --fb-glass-2:rgba(15,49,147,.06);
  --fb-border:rgba(15,49,147,.14);
  --fb-text:#16203a;
  --fb-text-dim:#5a6a8a;
  --fb-shadow:0 24px 60px rgba(15,49,147,.18);
  --fb-book-shadow:0 40px 90px rgba(15,49,147,.25);
}
/* Presentation mode: hide site chrome, focus the book */
body.fb-presenting #default_header,
body.fb-presenting .katalog-hero,
body.fb-presenting footer,
body.fb-presenting #scrollToTop{display:none !important;}
body.fb-presenting{background:#06070b;}

/* When a flipbook overlay (zoom/modal) is open, lift the whole section above
   the site header, footer, PWA bottom nav and indicators. Needed because
   .fb-section uses isolation:isolate, which would otherwise trap the
   overlay's z-index below the header. */
body.fb-overlay-open .fb-section{z-index:1000000;}
body.fb-overlay-open{overflow:hidden;}

/* ============ 2. SECTION / STAGE BACKDROP ============ */
.fb-section{padding:0;}
.fb-stage-wrap{
  position:relative;
  display:flex;
  gap:0;
  min-height:calc(100vh - 80px);
  width:100%;
  max-width:1500px;
  margin:0 auto;
}
/* Ambient light + spotlight behind the book */
.fb-ambient{
  position:absolute;inset:0;z-index:0;pointer-events:none;
  background:
    radial-gradient(60% 50% at 50% 38%,var(--fb-ambient) 0%,transparent 70%),
    radial-gradient(80% 60% at 50% 120%,rgba(0,168,232,.10) 0%,transparent 60%);
  filter:blur(10px);
}
.fb-spotlight{
  position:absolute;left:50%;top:34%;z-index:0;pointer-events:none;
  width:70%;height:60%;transform:translateX(-50%);
  background:radial-gradient(circle at 50% 40%,var(--fb-spot) 0%,transparent 65%);
  filter:blur(24px);opacity:.9;
  animation:fb-breathe 7s ease-in-out infinite;
}
@keyframes fb-breathe{0%,100%{opacity:.65;transform:translateX(-50%) scale(1);}50%{opacity:1;transform:translateX(-50%) scale(1.06);}}

/* ============ 3. SCENE & FLOATING BOOK ============ */
.fb-stage{
  position:relative;z-index:2;
  flex:1;display:flex;flex-direction:column;align-items:center;justify-content:center;
  padding:26px 18px 110px;
  min-height:calc(100vh - 80px);
}
.fb-scene{
  position:relative;
  perspective:2400px;
  perspective-origin:50% 42%;
  width:100%;
  max-width:920px;
  display:flex;align-items:center;justify-content:center;
  transform-style:preserve-3d;
}
/* Floating glow directly behind book */
.fb-book-glow{
  position:absolute;left:50%;top:50%;z-index:0;pointer-events:none;
  width:96%;height:104%;transform:translate(-50%,-50%) translateZ(-40px);
  background:radial-gradient(50% 60% at 50% 50%,rgba(0,168,232,.28),transparent 72%);
  filter:blur(28px);
}
/* Realistic ground / drop shadow under the book */
.fb-book-shadow{
  position:absolute;left:50%;bottom:-26px;z-index:0;pointer-events:none;
  width:78%;height:34px;transform:translateX(-50%);
  background:radial-gradient(50% 50% at 50% 50%,rgba(0,0,0,.55),transparent 72%);
  filter:blur(14px);
  animation:fb-float 6s ease-in-out infinite;
}
@keyframes fb-float{0%,100%{transform:translateX(-50%) translateY(0);}50%{transform:translateX(-50%) translateY(8px);}}

/* The StPageFlip root */
#flipbook.fb-book{
  position:relative;z-index:2;
  width:100%;
  filter:drop-shadow(0 30px 40px rgba(0,0,0,.45));
  transform:rotateX(4deg);
  transform-style:preserve-3d;
  will-change:transform;
  animation:fb-rise .9s cubic-bezier(.22,1,.36,1) both;
}
@keyframes fb-rise{from{opacity:0;transform:rotateX(10deg) translateY(28px);}to{opacity:1;transform:rotateX(4deg) translateY(0);}}

/* Portrait mode (cover only, single page) */
.fb-scene.fb-portrait #flipbook.fb-book {
  max-width: 45%;
  margin: 0 auto;
}
/* Landscape mode (2-page spread) */
.fb-scene.fb-landscape #flipbook.fb-book {
  max-width: 90%;
}

/* ============ 4. STPAGEFLIP OVERRIDES ============ */
.fb-section .stf__parent{margin:0 auto;max-width:100%;}
.fb-section .stf__block{perspective:2600px;}
.fb-section .stf__item{
  transform-style:preserve-3d;
  border-radius:3px 8px 8px 3px;
  overflow:hidden;
  box-shadow:0 0 0 1px rgba(255,255,255,.04);
}
.fb-section .stf__item img{
  width:100%;height:100%;object-fit:cover;display:block;
  image-rendering:auto;
  -webkit-user-drag:none;user-select:none;
}
/* Glossy paper sheen overlay on each rendered page (canvas-safe, pointer none) */
.fb-section .stf__item::after{
  content:"";position:absolute;inset:0;pointer-events:none;
  background:linear-gradient(105deg,rgba(255,255,255,.14) 0%,transparent 22%,transparent 80%,rgba(255,255,255,.06) 100%);
  mix-blend-mode:screen;opacity:.5;
}
/* Subtle vignette on the whole book to add depth */
.fb-scene::after{
  content:"";position:absolute;inset:0;z-index:3;pointer-events:none;
  background:radial-gradient(120% 100% at 50% 40%,transparent 60%,rgba(0,0,0,.18) 100%);
  border-radius:10px;
}

/* ============ 5. TOP BAR ============ */
.fb-topbar{
  position:absolute;top:16px;left:50%;transform:translateX(-50%);
  z-index:20;display:flex;align-items:center;gap:14px;
  padding:8px 14px;border-radius:30px;
  background:var(--fb-glass);backdrop-filter:blur(14px) saturate(140%);
  -webkit-backdrop-filter:blur(14px) saturate(140%);
  border:1px solid var(--fb-border);
  box-shadow:0 8px 26px rgba(0,0,0,.28);
  max-width:calc(100% - 32px);
}
.fb-counter{
  font-weight:700;font-size:14px;letter-spacing:.5px;white-space:nowrap;
  padding:4px 12px;border-radius:20px;background:var(--fb-accent-grad);color:#fff;
  box-shadow:0 4px 14px rgba(0,168,232,.4);
}
.fb-counter span{font-variant-numeric:tabular-nums;}
.fb-progress-wrap{display:flex;align-items:center;gap:8px;}
.fb-progress-bar{
  width:120px;height:7px;border-radius:6px;overflow:hidden;
  background:rgba(255,255,255,.16);
}
.fb-progress-fill{
  height:100%;width:0;border-radius:6px;
  background:var(--fb-accent-grad);
  box-shadow:0 0 10px rgba(0,168,232,.6);
  transition:width .5s cubic-bezier(.22,1,.36,1);
}
.fb-progress-pct{font-size:12px;font-weight:600;color:var(--fb-text-dim);min-width:34px;text-align:right;}
.fb-top-actions{display:flex;gap:6px;}

/* ============ 6. BOTTOM TOOLBAR ============ */
.fb-toolbar{
  position:absolute;left:50%;bottom:22px;transform:translateX(-50%);
  z-index:25;display:flex;align-items:center;gap:6px;flex-wrap:wrap;justify-content:center;
  padding:10px 14px;border-radius:22px;max-width:calc(100% - 24px);
  background:var(--fb-glass);backdrop-filter:blur(18px) saturate(150%);
  -webkit-backdrop-filter:blur(18px) saturate(150%);
  border:1px solid var(--fb-border);
  box-shadow:0 14px 40px rgba(0,0,0,.4);
}
.fb-tb-group{display:flex;align-items:center;gap:5px;}
.fb-tb-divider{width:1px;height:28px;background:var(--fb-border);margin:0 4px;}
.fb-page-input{
  width:54px;height:38px;text-align:center;border-radius:11px;
  background:var(--fb-glass-2);border:1px solid var(--fb-border);
  color:var(--fb-text);font-weight:700;font-size:13px;outline:none;
  font-variant-numeric:tabular-nums;
}
.fb-page-input:focus{border-color:var(--fb-accent);box-shadow:0 0 0 3px rgba(0,168,232,.25);}
/* hide number input spinners */
.fb-page-input::-webkit-outer-spin-button,.fb-page-input::-webkit-inner-spin-button{-webkit-appearance:none;margin:0;}
.fb-page-input{-moz-appearance:textfield;}

/* Icon buttons (shared) */
.fb-icon-btn{
  position:relative;display:inline-flex;align-items:center;justify-content:center;
  width:40px;height:40px;border:none;border-radius:12px;cursor:pointer;
  color:var(--fb-text);background:var(--fb-glass-2);border:1px solid var(--fb-border);
  font-size:16px;transition:transform .18s cubic-bezier(.34,1.56,.64,1),background .2s,box-shadow .2s,color .2s;
  overflow:hidden;flex:0 0 auto;
}
.fb-icon-btn:hover{background:var(--fb-accent-grad);color:#fff;transform:translateY(-3px);box-shadow:0 8px 20px rgba(0,168,232,.35);}
.fb-icon-btn:active{transform:translateY(-1px) scale(.95);}
.fb-icon-btn.active{background:var(--fb-accent-grad);color:#fff;box-shadow:0 6px 16px rgba(0,168,232,.4);}
.fb-icon-btn[disabled]{opacity:.4;cursor:not-allowed;pointer-events:none;}
.fb-icon-btn.is-play.active{background:linear-gradient(135deg,#1bbf72,#16a34a);box-shadow:0 6px 16px rgba(22,163,74,.4);}
.fb-icon-btn.is-stop{background:linear-gradient(135deg,#e0533d,#c1272d);color:#fff;}
.fb-icon-btn.is-stop:hover{transform:translateY(-3px);box-shadow:0 8px 20px rgba(193,39,45,.4);}
/* Tooltip */
.fb-icon-btn[data-tip]:hover::after{
  content:attr(data-tip);position:absolute;bottom:calc(100% + 9px);left:50%;
  transform:translateX(-50%);white-space:nowrap;
  background:#11151f;color:#fff;font-size:11px;font-weight:600;letter-spacing:.3px;
  padding:5px 10px;border-radius:8px;pointer-events:none;
  box-shadow:0 6px 18px rgba(0,0,0,.4);z-index:60;
  animation:fb-tip .18s ease both;
}
.fb-icon-btn[data-tip]:hover::before{
  content:"";position:absolute;bottom:calc(100% + 4px);left:50%;transform:translateX(-50%);
  border:5px solid transparent;border-top-color:#11151f;pointer-events:none;z-index:60;
}
@keyframes fb-tip{from{opacity:0;transform:translateX(-50%) translateY(4px);}to{opacity:1;transform:translateX(-50%) translateY(0);}}

/* Ripple */
.fb-ripple{position:absolute;border-radius:50%;background:rgba(255,255,255,.45);transform:scale(0);animation:fb-ripple .6s ease-out;pointer-events:none;}
@keyframes fb-ripple{to{transform:scale(2.6);opacity:0;}}

/* ============ 7. THUMBNAIL SIDEBAR ============ */
.fb-thumbs{
  position:relative;z-index:6;width:0;flex:0 0 0;
  background:rgba(8,10,16,.55);backdrop-filter:blur(10px);-webkit-backdrop-filter:blur(10px);
  border-right:1px solid var(--fb-border);
  overflow:hidden;transition:flex-basis .4s cubic-bezier(.22,1,.36,1),width .4s cubic-bezier(.22,1,.36,1);
}
.fb-thumbs.open{flex-basis:188px;width:188px;}
.fb-section.fb-light .fb-thumbs{background:rgba(255,255,255,.5);}
.fb-thumbs-head{
  position:sticky;top:0;z-index:2;display:flex;align-items:center;justify-content:space-between;
  padding:14px 14px 10px;font-weight:700;font-size:13px;letter-spacing:.6px;text-transform:uppercase;
  color:var(--fb-text);background:inherit;
}
.fb-thumbs-close{cursor:pointer;border:none;background:transparent;color:var(--fb-text-dim);font-size:18px;line-height:1;}
.fb-thumbs-list{display:flex;flex-direction:column;gap:12px;padding:4px 12px 24px;overflow-y:auto;max-height:calc(100vh - 70px);}
.fb-thumbs-list::-webkit-scrollbar{width:8px;}
.fb-thumbs-list::-webkit-scrollbar-thumb{background:var(--fb-border);border-radius:8px;}
.fb-thumb{
  position:relative;cursor:pointer;border-radius:8px;overflow:hidden;
  border:2px solid transparent;background:rgba(255,255,255,.06);
  transition:transform .2s,box-shadow .2s,border-color .2s;aspect-ratio:3/4.2;
}
.fb-thumb img{width:100%;height:100%;object-fit:cover;display:block;opacity:.92;transition:opacity .3s;}
.fb-thumb:hover{transform:translateY(-2px) scale(1.02);box-shadow:0 8px 20px rgba(0,0,0,.4);}
.fb-thumb img.fb-lazy{opacity:0;}
.fb-thumb.loaded img.fb-lazy{opacity:.92;}
.fb-thumb.active{border-color:#e53935;box-shadow:0 0 0 2px rgba(229,57,53,.35),0 8px 20px rgba(229,57,53,.3);}
.fb-thumb.active img{opacity:1;}
.fb-thumb-num{
  position:absolute;left:4px;bottom:4px;font-size:10px;font-weight:700;color:#fff;
  background:rgba(0,0,0,.6);padding:2px 6px;border-radius:6px;
}
.fb-thumb-fav{position:absolute;right:4px;top:4px;color:#ffcf4d;font-size:12px;opacity:0;transition:opacity .2s;}
.fb-thumb.faved .fb-thumb-fav{opacity:1;}
.fb-thumb-skel{position:absolute;inset:0;background:linear-gradient(100deg,rgba(255,255,255,.06) 30%,rgba(255,255,255,.14) 50%,rgba(255,255,255,.06) 70%);background-size:200% 100%;animation:fb-skel 1.2s infinite;}
@keyframes fb-skel{from{background-position:200% 0;}to{background-position:-200% 0;}}

/* ============ 8. TABLE OF CONTENTS MODAL ============ */
.fb-modal{
  position:fixed;inset:0;z-index:1200;display:none;align-items:center;justify-content:center;padding:20px;
  background:rgba(4,6,12,.66);backdrop-filter:blur(6px);-webkit-backdrop-filter:blur(6px);
}
.fb-modal.open{display:flex;animation:fb-fade .25s ease;}
@keyframes fb-fade{from{opacity:0;}to{opacity:1;}}
.fb-modal-card{
  width:min(560px,94vw);max-height:84vh;overflow:auto;border-radius:18px;
  background:linear-gradient(160deg,#161a24,#0e1118);color:var(--fb-text);
  border:1px solid var(--fb-border);box-shadow:var(--fb-shadow);
  animation:fb-pop .3s cubic-bezier(.22,1,.36,1);
}
.fb-section.fb-light .fb-modal-card{background:linear-gradient(160deg,#fff,#eef3fb);color:#16203a;}
@keyframes fb-pop{from{opacity:0;transform:translateY(18px) scale(.97);}to{opacity:1;transform:none;}}
.fb-modal-head{
  position:sticky;top:0;display:flex;align-items:center;justify-content:space-between;
  padding:16px 18px;border-bottom:1px solid var(--fb-border);
  background:inherit;z-index:2;
}
.fb-modal-head h3{font-size:16px;font-weight:800;letter-spacing:.4px;margin:0;}
.fb-modal-close{cursor:pointer;border:none;background:transparent;color:var(--fb-text-dim);font-size:22px;line-height:1;}
.fb-modal-close:hover{color:var(--fb-text);}
.fb-toc-list{list-style:none;margin:0;padding:8px 8px 16px;}
.fb-toc-item{
  display:flex;align-items:center;gap:12px;padding:11px 12px;border-radius:12px;cursor:pointer;
  transition:background .2s,transform .2s;
}
.fb-toc-item:hover{background:var(--fb-glass-2);transform:translateX(4px);}
.fb-toc-item.current{background:var(--fb-accent-grad);color:#fff;}
.fb-toc-item.current:hover{transform:translateX(4px) scale(1.01);}
.fb-toc-num{flex:0 0 34px;height:34px;border-radius:9px;display:flex;align-items:center;justify-content:center;font-weight:800;font-size:13px;background:rgba(255,255,255,.12);}
.fb-toc-item.current .fb-toc-num{background:rgba(255,255,255,.25);}
.fb-toc-title{flex:1;font-size:14px;font-weight:600;}
.fb-toc-meta{font-size:12px;color:var(--fb-text-dim);}
.fb-toc-item.current .fb-toc-meta{color:rgba(255,255,255,.85);}
.fb-modal-empty{padding:30px;text-align:center;color:var(--fb-text-dim);font-size:14px;}

/* ============ 9. SEARCH MODAL ============ */
.fb-search-input{
  width:100%;padding:13px 16px;border-radius:12px;font-size:15px;outline:none;
  background:var(--fb-glass-2);border:1px solid var(--fb-border);color:var(--fb-text);
}
.fb-search-input:focus{border-color:var(--fb-accent);box-shadow:0 0 0 3px rgba(0,168,232,.25);}
.fb-search-results{margin-top:10px;max-height:50vh;overflow:auto;}
.fb-search-item{display:flex;align-items:center;gap:12px;padding:10px 12px;border-radius:10px;cursor:pointer;transition:background .2s;}
.fb-search-item:hover{background:var(--fb-glass-2);}

/* ============ 10. ZOOM OVERLAY ============ */
.fb-zoom{
  position:fixed;inset:0;z-index:2000;display:none;flex-direction:column;
  background:#050608;opacity:0;transition:opacity .3s ease;
}
.fb-zoom.open{display:flex;opacity:1;}
.fb-zoom-bar{
  position:relative;z-index:3;display:flex;align-items:center;justify-content:center;gap:10px;flex-wrap:wrap;
  padding:12px 16px;background:linear-gradient(transparent,rgba(0,0,0,.55));
}
.fb-zoom-stage{flex:1;display:flex;align-items:center;justify-content:center;overflow:hidden;cursor:grab;touch-action:none;}
.fb-zoom-stage.dragging{cursor:grabbing;}
.fb-zoom-stage img{max-width:96vw;max-height:82vh;object-fit:contain;will-change:transform;transition:transform .12s ease;user-select:none;-webkit-user-drag:none;}
.fb-zoom-stage.no-trans img{transition:none;}
.fb-zoom-close{position:absolute;top:14px;right:16px;z-index:4;}
.fb-zoom-side{position:absolute;top:50%;transform:translateY(-50%);z-index:3;}
.fb-zoom-side.prev{left:14px;}.fb-zoom-side.next{right:14px;}
.fb-zoom-page{color:#fff;font-weight:700;font-size:14px;background:rgba(255,255,255,.14);padding:6px 14px;border-radius:20px;}
.fb-zoom-scale{color:#fff;font-weight:700;font-size:13px;min-width:54px;text-align:center;}
/* Zoom overlay is always dark — force its controls to be visible regardless of theme */
.fb-zoom .fb-icon-btn{
  color:#fff;background:rgba(255,255,255,.14);border:1px solid rgba(255,255,255,.22);
}
.fb-zoom .fb-icon-btn:hover{background:var(--fb-accent-grad);color:#fff;}
.fb-zoom .fb-page-input{
  color:#fff;background:rgba(255,255,255,.14);border:1px solid rgba(255,255,255,.22);
}
.fb-zoom .fb-page-input::placeholder{color:rgba(255,255,255,.6);}

/* ============ 11. LOADING ============ */
.fb-loading{position:absolute;inset:0;z-index:30;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:18px;text-align:center;}
.fb-loading.hide{display:none;}
.fb-spinner{width:58px;height:58px;border-radius:50%;
  border:4px solid rgba(0,168,232,.18);border-top-color:var(--fb-accent);
  animation:fb-spin 1s linear infinite;}
@keyframes fb-spin{to{transform:rotate(360deg);}}
.fb-loading-txt{font-size:14px;font-weight:600;color:var(--fb-text-dim);letter-spacing:.5px;}
.fb-load-track{width:220px;max-width:70vw;height:6px;border-radius:6px;background:rgba(255,255,255,.14);overflow:hidden;}
.fb-load-fill{height:100%;width:0;border-radius:6px;background:var(--fb-accent-grad);box-shadow:0 0 10px rgba(0,168,232,.6);transition:width .3s ease;}
.fb-load-pct{font-size:12px;color:var(--fb-text-dim);}

/* ============ 12. SNACKBAR / WATERMARK / LOGO ============ */
.fb-snackbar{
  position:fixed;left:50%;bottom:96px;transform:translateX(-50%) translateY(40px);
  z-index:2100;display:flex;align-items:center;gap:10px;
  padding:13px 20px;border-radius:14px;font-size:13px;font-weight:600;color:#fff;
  background:linear-gradient(135deg,#11151f,#1a2030);border:1px solid var(--fb-border);
  box-shadow:0 12px 36px rgba(0,0,0,.45);opacity:0;pointer-events:none;
  transition:transform .42s cubic-bezier(.34,1.56,.64,1),opacity .3s ease;max-width:90vw;
}
.fb-snackbar.show{transform:translateX(-50%) translateY(0);opacity:1;}
.fb-snackbar i{color:var(--fb-accent);font-size:16px;}
.fb-snackbar.ok i{color:#1bbf72;}
.fb-snackbar.err i{color:#ff5a5a;}

.fb-watermark{
  position:absolute;right:14px;bottom:14px;z-index:8;pointer-events:none;
  font-size:11px;font-weight:700;letter-spacing:2px;color:rgba(255,255,255,.22);
  text-transform:uppercase;writing-mode:vertical-rl;transform:rotate(180deg);
}
.fb-section.fb-light .fb-watermark{color:rgba(15,49,147,.18);}
.fb-logo-corner{
  position:absolute;left:14px;bottom:14px;z-index:8;pointer-events:none;
  display:flex;align-items:center;gap:8px;opacity:.85;
}
.fb-logo-corner img{height:26px;width:auto;filter:drop-shadow(0 2px 6px rgba(0,0,0,.4));}

/* Bookmark badge on top bar */
.fb-bookmark-badge{position:absolute;top:-4px;right:-4px;width:14px;height:14px;border-radius:50%;background:#e53935;border:2px solid var(--fb-bg-2);display:none;}
.fb-icon-btn.has-bookmark .fb-bookmark-badge{display:block;}

/* ============ 13. RESPONSIVE ============ */
@media (max-width:1100px){
  .fb-scene{max-width:760px;}
}
@media (max-width:920px){
  .fb-stage{padding:22px 12px 110px;}
  .fb-thumbs.open{flex-basis:150px;width:150px;}
  .fb-scene{max-width:100%;}
}
@media (max-width:760px){
  /* Mobile: single page handled by StPageFlip portrait mode */
  .fb-topbar{gap:8px;padding:7px 10px;}
  .fb-progress-bar{width:80px;}
  .fb-progress-pct{display:none;}
  .fb-stage{padding:18px 10px 188px;}
  /* Toolbar: exactly 2 landscape rows — every button visible */
  .fb-toolbar{
    display:grid;
    grid-template-columns:repeat(8, auto);
    justify-content:center;align-items:center;
    gap:4px;padding:7px 7px;border-radius:16px;
    max-width:calc(100% - 12px);
    bottom:86px;
    z-index:10020;
  }
  .fb-tb-group{display:contents;}
  .fb-tb-divider{display:none;}
  .fb-icon-btn{width:33px;height:33px;font-size:13px;border-radius:9px;}
  .fb-page-input{width:44px;height:33px;font-size:12px;}
  .fb-thumbs{position:fixed;top:0;left:0;bottom:0;z-index:60;width:0 !important;flex-basis:0 !important;}
  .fb-thumbs.open{width:78vw !important;flex-basis:78vw !important;box-shadow:0 0 50px rgba(0,0,0,.6);}
  .fb-thumbs-backdrop{position:fixed;inset:0;z-index:55;background:rgba(0,0,0,.5);display:none;}
  .fb-thumbs-backdrop.open{display:block;}
  .fb-watermark{display:none;}
}
@media (max-width:480px){
  .fb-topbar{top:10px;}
  .fb-counter{font-size:12px;padding:3px 9px;}
  .fb-stage{padding-bottom:184px;}
  .fb-toolbar{bottom:82px;}
  .fb-icon-btn{width:31px;height:31px;font-size:12px;}
  .fb-page-input{width:40px;height:31px;font-size:11px;}
}

/* Fullscreen tweaks */
.fb-section:fullscreen{width:100vw;height:100vh;max-width:none;background:#05060a;border-radius:0;}
.fb-section:fullscreen .fb-stage-wrap{min-height:100vh;max-width:1700px;}
.fb-section:-webkit-full-screen{width:100vw;height:100vh;background:#05060a;}

/* ============ FLOATING SLIDE NAVIGATION ARROWS ============ */
.fb-nav-arrow{
  position:absolute;top:50%;transform:translateY(-50%);z-index:22;
  width:54px;height:54px;border:none;border-radius:50%;cursor:pointer;
  display:flex;align-items:center;justify-content:center;
  font-size:20px;color:#fff;
  background:rgba(15,49,147,.78);
  border:1px solid rgba(255,255,255,.22);
  box-shadow:0 8px 28px rgba(0,0,0,.45);
  backdrop-filter:blur(10px);-webkit-backdrop-filter:blur(10px);
  opacity:.5;
  transition:transform .25s cubic-bezier(.34,1.56,.64,1),background .25s,box-shadow .25s,opacity .3s;
}
.fb-nav-prev{left:18px;}
.fb-nav-next{right:18px;}
.fb-nav-arrow:hover{
  opacity:1;
  background:linear-gradient(135deg,#0F3193,#00a8e8);
  transform:translateY(-50%) scale(1.14);
  box-shadow:0 12px 38px rgba(0,168,232,.5);
}
.fb-nav-arrow:active{transform:translateY(-50%) scale(.94);}
.fb-section.fb-light .fb-nav-arrow{background:rgba(15,49,147,.85);color:#fff;}
/* Tooltip */
.fb-nav-arrow[data-tip]:hover::after{
  content:attr(data-tip);position:absolute;top:50%;transform:translateY(-50%);
  white-space:nowrap;background:#11151f;color:#fff;font-size:12px;font-weight:600;
  padding:6px 12px;border-radius:8px;pointer-events:none;z-index:60;
  box-shadow:0 6px 18px rgba(0,0,0,.4);
}
.fb-nav-prev[data-tip]:hover::after{left:calc(100% + 12px);}
.fb-nav-next[data-tip]:hover::after{right:calc(100% + 12px);}
/* Hide on mobile (toolbar covers navigation) */
@media (max-width:760px){
  .fb-nav-arrow{display:none !important;}
}
/* Prominent & always visible in fullscreen */
.fb-section:fullscreen .fb-nav-arrow,
.fb-section:-webkit-full-screen .fb-nav-arrow{
  width:84px;height:84px;font-size:38px;opacity:1;
  box-shadow:0 12px 40px rgba(0,0,0,.7);
  animation:fb-nav-pulse 2.6s ease-in-out infinite;
  border-width:2px;
}
.fb-section:fullscreen .fb-nav-arrow:hover,
.fb-section:-webkit-full-screen .fb-nav-arrow:hover{
  transform:translateY(-50%) scale(1.18);
  box-shadow:0 16px 48px rgba(0,168,232,.6);
}
.fb-section:fullscreen .fb-nav-prev,
.fb-section:-webkit-full-screen .fb-nav-prev{left:34px;}
.fb-section:fullscreen .fb-nav-next,
.fb-section:-webkit-full-screen .fb-nav-next{right:34px;}
@keyframes fb-nav-pulse{
  0%,100%{box-shadow:0 12px 40px rgba(0,0,0,.7);}
  50%{box-shadow:0 12px 40px rgba(0,168,232,.6);}
}

/* ============ FULLSCREEN UI ENLARGEMENT ============ */
/* Bigger toolbar buttons in fullscreen */
.fb-section:fullscreen .fb-toolbar,
.fb-section:-webkit-full-screen .fb-toolbar{
  gap:10px;padding:16px 22px;border-radius:24px;
}
.fb-section:fullscreen .fb-icon-btn,
.fb-section:-webkit-full-screen .fb-icon-btn{
  width:54px;height:54px;font-size:22px;border-radius:14px;
}
.fb-section:fullscreen .fb-icon-btn:hover,
.fb-section:-webkit-full-screen .fb-icon-btn:hover{
  transform:translateY(-4px) scale(1.06);
  box-shadow:0 10px 26px rgba(0,168,232,.5);
}
.fb-section:fullscreen .fb-page-input,
.fb-section:-webkit-full-screen .fb-page-input{
  width:68px;height:54px;font-size:16px;border-radius:13px;
}
.fb-section:fullscreen .fb-tb-divider,
.fb-section:-webkit-full-screen .fb-tb-divider{height:40px;margin:0 6px;}
/* Bigger top bar in fullscreen */
.fb-section:fullscreen .fb-topbar,
.fb-section:-webkit-full-screen .fb-topbar{
  gap:18px;padding:12px 22px;border-radius:34px;
}
.fb-section:fullscreen .fb-counter,
.fb-section:-webkit-full-screen .fb-counter{font-size:18px;padding:6px 16px;}
.fb-section:fullscreen .fb-progress-bar,
.fb-section:-webkit-full-screen .fb-progress-bar{width:160px;height:9px;}
.fb-section:fullscreen .fb-progress-pct,
.fb-section:-webkit-full-screen .fb-progress-pct{font-size:14px;}
/* Bigger tooltips in fullscreen */
.fb-section:fullscreen .fb-icon-btn[data-tip]:hover::after,
.fb-section:-webkit-full-screen .fb-icon-btn[data-tip]:hover::after{
  font-size:13px;padding:7px 13px;bottom:calc(100% + 12px);
}
.fb-section:fullscreen .fb-nav-arrow[data-tip]:hover::after,
.fb-section:-webkit-full-screen .fb-nav-arrow[data-tip]:hover::after{
  font-size:14px;padding:8px 14px;
}
/* Fullscreen responsive: tablet */
@media (max-width:1100px){
  .fb-section:fullscreen .fb-nav-arrow,
  .fb-section:-webkit-full-screen .fb-nav-arrow{width:72px;height:72px;font-size:32px;}
  .fb-section:fullscreen .fb-nav-prev,
  .fb-section:-webkit-full-screen .fb-nav-prev{left:22px;}
  .fb-section:fullscreen .fb-nav-next,
  .fb-section:-webkit-full-screen .fb-nav-next{right:22px;}
  .fb-section:fullscreen .fb-icon-btn,
  .fb-section:-webkit-full-screen .fb-icon-btn{width:48px;height:48px;font-size:20px;}
  .fb-section:fullscreen .fb-toolbar,
  .fb-section:-webkit-full-screen .fb-toolbar{padding:12px 16px;gap:8px;}
}
/* Fullscreen responsive: mobile — show arrows again, bigger tap targets */
@media (max-width:760px){
  .fb-section:fullscreen .fb-nav-arrow,
  .fb-section:-webkit-full-screen .fb-nav-arrow{
    display:flex !important;width:64px;height:64px;font-size:28px;
  }
  .fb-section:fullscreen .fb-nav-prev,
  .fb-section:-webkit-full-screen .fb-nav-prev{left:14px;}
  .fb-section:fullscreen .fb-nav-next,
  .fb-section:-webkit-full-screen .fb-nav-next{right:14px;}
  .fb-section:fullscreen .fb-toolbar,
  .fb-section:-webkit-full-screen .fb-toolbar{bottom:90px;padding:10px 12px;}
  .fb-section:fullscreen .fb-icon-btn,
  .fb-section:-webkit-full-screen .fb-icon-btn{width:44px;height:44px;font-size:18px;}
}

/* Reduced motion */
@media (prefers-reduced-motion:reduce){
  .fb-spotlight,.fb-book-shadow{animation:none;}
  *{scroll-behavior:auto;}
}

/* ============ HERO (page header) ============ */
.katalog-hero{
  background:linear-gradient(135deg,#0056b3 0%,#00a8e8 100%);
  color:#fff;padding:100px 20px;text-align:center;
  border-bottom-left-radius:50px;border-bottom-right-radius:50px;
  position:relative;overflow:hidden;
}
.katalog-hero::before{
  content:"";position:absolute;inset:0;opacity:.2;pointer-events:none;
  background:url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><defs><pattern id="grain" width="100" height="100" patternUnits="userSpaceOnUse"><circle cx="25" cy="25" r="1" fill="rgba(255,255,255,0.1)"/><circle cx="75" cy="75" r="1.5" fill="rgba(255,255,255,0.05)"/></pattern></defs><rect width="100" height="100" fill="url(%23grain)"/></svg>');
}
.katalog-hero h1{color:#fff !important;font-weight:700;font-size:2.8rem;margin-bottom:20px;line-height:1.2;}
.katalog-hero p{color:#fff !important;font-weight:500;font-size:1.2rem;margin-bottom:35px;max-width:700px;margin-left:auto;margin-right:auto;opacity:.95;}
.katalog-btn-primary{
  background-color:#ffc107 !important;
  color:#212529 !important;
  padding:15px 35px !important;
  border-radius:25px;
  text-decoration:none !important;
  font-weight:600 !important;
  font-size:1.1rem !important;
  transition:all .3s ease !important;
  border:none !important;
  display:inline-flex !important;
  align-items:center;
  gap:10px;
  box-shadow:0 8px 25px rgba(255,193,7,.4) !important;
}
.katalog-btn-primary:hover{
  background-color:#ffb300 !important;
  transform:translateY(-3px) !important;
  box-shadow:0 12px 35px rgba(255,193,7,.6) !important;
  color:#212529 !important;
}
@media(max-width:768px){.katalog-hero{padding:70px 20px;}.katalog-hero h1{font-size:2.2rem;}.katalog-hero p{font-size:1.1rem;}}
@media(max-width:576px){.katalog-hero{padding:60px 20px;}.katalog-hero h1{font-size:1.9rem;}.katalog-hero p{font-size:1rem;}.katalog-btn-primary{width:100%;justify-content:center;}}

/* ============ AUTOPLAY TIMER BAR ============ */
.fb-autoplay-bar{
  position:absolute;left:0;bottom:0;z-index:7;height:4px;width:0;
  background:linear-gradient(90deg,#1bbf72,#00a8e8);border-radius:0 2px 0 0;
  box-shadow:0 0 8px rgba(0,168,232,.6);transition:width .1s linear;pointer-events:none;
}

/* ============ SHARE MODAL ============ */
.fb-share-icons{display:flex;justify-content:center;gap:14px;flex-wrap:wrap;margin-bottom:18px;}
.fb-share-ico{
  width:54px;height:54px;border:none;border-radius:50%;color:#fff;font-size:20px;cursor:pointer;
  display:flex;align-items:center;justify-content:center;transition:transform .3s cubic-bezier(.34,1.56,.64,1),box-shadow .3s;
  box-shadow:0 6px 18px rgba(0,0,0,.18);
}
.fb-share-ico:hover{transform:translateY(-5px) scale(1.08);box-shadow:0 12px 26px rgba(0,0,0,.3);}
.fb-share-ico:active{transform:translateY(-2px) scale(.95);}
.ico-wa{background:linear-gradient(145deg,#25D366,#128C7E);}
.ico-fb{background:linear-gradient(145deg,#1877F2,#0a52c4);}
.ico-x{background:#000;}
.ico-share{background:linear-gradient(145deg,#0F3193,#00a8e8);}
.fb-share-copy-row{display:flex;align-items:center;max-width:420px;margin:0 auto;background:#fff;border-radius:12px;overflow:hidden;border:2px solid rgba(15,49,147,.15);}
.fb-section.fb-light .fb-share-copy-row{background:#fff;}
.fb-share-copy-row input{flex:1;border:none;outline:none;padding:11px 14px;font-size:13px;color:#444;background:transparent;min-width:0;}
.fb-share-copy-row button{border:none;background:linear-gradient(135deg,#0F3193,#00a8e8);color:#fff;font-weight:600;font-size:13px;padding:11px 18px;cursor:pointer;white-space:nowrap;}
.fb-share-copy-row button:hover{filter:brightness(1.1);}