/* ===== Book slot (.bk-) — 5×3 reels, wild+scatter book, expanding special symbol, ante + bonus buy ===== */
.bk-wrap{width:100%;max-width:740px;display:flex;flex-direction:column;align-items:center;gap:10px}
.bk-top{min-height:36px;display:flex;align-items:center;justify-content:center;max-width:100%}

/* frame: an old tome's gilded border in theme colours */
.bk-frame{position:relative;padding:12px;border-radius:26px;background:linear-gradient(160deg,color-mix(in srgb,var(--ta) 70%,#fff) 0%,color-mix(in srgb,var(--ta) 55%,#78350f) 45%,color-mix(in srgb,var(--ta) 80%,#fff) 100%);box-shadow:inset 0 2px 0 rgba(255,255,255,.7),inset 0 -3px 0 rgba(0,0,0,.25),0 0 0 2px rgba(0,0,0,.18),0 24px 60px rgba(0,0,0,.32);transition:box-shadow .4s}
.bk-frame::before,.bk-frame::after{content:"";position:absolute;width:26px;height:26px;border:3px solid rgba(255,255,255,.85);border-radius:4px;transform:rotate(45deg);background:color-mix(in srgb,var(--ta) 65%,#78350f);box-shadow:0 2px 6px rgba(0,0,0,.35);top:50%;margin-top:-13px;z-index:2}
.bk-frame::before{left:-12px}.bk-frame::after{right:-12px}
.bk-frame.fs{box-shadow:inset 0 2px 0 rgba(255,255,255,.7),0 0 0 3px #fde047,0 0 46px rgba(253,224,71,.6),0 24px 60px rgba(0,0,0,.32);animation:bkglow 1.6s ease-in-out infinite alternate}
@keyframes bkglow{to{box-shadow:inset 0 2px 0 rgba(255,255,255,.7),0 0 0 3px #fff7ae,0 0 62px rgba(253,224,71,.85),0 24px 60px rgba(0,0,0,.32)}}
.bk-reels{--cell:80px;display:grid;gap:6px;position:relative;padding:6px;border-radius:16px;background:linear-gradient(180deg,#1c0f05,#2d1708 50%,#1c0f05);box-shadow:inset 0 0 0 2px rgba(0,0,0,.35),inset 0 8px 18px rgba(0,0,0,.55)}
.bk-reel{position:relative;overflow:hidden;height:calc(var(--cell) * 3);width:var(--cell);border-radius:12px;background:radial-gradient(120% 70% at 50% 50%,#fff8e6 0%,#f4e3bd 60%,#e2c890 100%);box-shadow:inset 0 10px 14px -6px rgba(60,30,5,.55),inset 0 -10px 14px -6px rgba(60,30,5,.55)}
.bk-reel::after{content:"";position:absolute;inset:0;pointer-events:none;background:repeating-linear-gradient(0deg,rgba(120,72,20,.05) 0 2px,transparent 2px 7px);border-radius:inherit}
.bk-strip{display:flex;flex-direction:column;will-change:transform}
.bk-reel.blur .bk-strip{filter:blur(2.2px) saturate(1.2)}
.bk-reel.stop .bk-strip{animation:bkland .32s cubic-bezier(.3,1.6,.5,1)}
@keyframes bkland{0%{transform:translateY(-7%)}60%{transform:translateY(2.5%)}100%{transform:translateY(0)}}
.bk-reel.tease{box-shadow:0 0 0 3px #fde047,0 0 26px #fde047,inset 0 0 18px rgba(253,224,71,.8);animation:bktease .35s infinite alternate}
@keyframes bktease{to{box-shadow:0 0 0 3px #f97316,0 0 34px #f97316,inset 0 0 22px rgba(249,115,22,.8)}}
.bk-cell{height:var(--cell);display:grid;place-items:center;position:relative;transition:opacity .25s,filter .25s}
.bk-reels.dim .bk-cell:not(.win){opacity:.42;filter:saturate(.4)}

/* symbols */
.bk-s{position:relative;width:90%;height:90%;display:grid;place-items:center;line-height:1;border-radius:22%}
.bk-card b{font-family:var(--display);font-weight:900;font-size:calc(var(--cell) * .58);letter-spacing:-.05em;background:linear-gradient(180deg,#fff 0%,color-mix(in srgb,var(--k) 75%,var(--ta)) 42%,color-mix(in srgb,var(--k) 55%,#1e0b3b) 100%);-webkit-background-clip:text;background-clip:text;color:transparent;-webkit-text-stroke:1.5px rgba(70,35,8,.75);filter:drop-shadow(0 2px 0 rgba(255,255,255,.9)) drop-shadow(0 3px 4px rgba(60,30,5,.35))}
.bk-card.ten b{font-size:calc(var(--cell) * .48)}
.bk-hi{background:radial-gradient(circle at 50% 50%,color-mix(in srgb,var(--k) 55%,transparent) 0 26%,transparent 66%)}
.bk-hi span{font-size:calc(var(--cell) * .6);filter:drop-shadow(0 3px 3px rgba(60,30,5,.45));display:block}
.bk-hi.top{background:radial-gradient(circle at 50% 50%,#fff 0 14%,color-mix(in srgb,var(--k) 70%,transparent) 32%,transparent 68%)}
.bk-hi.top span{font-size:calc(var(--cell) * .66)}

/* the book: original leather tome with the theme's emblem */
.bk-bk em{position:absolute;bottom:1%;left:50%;transform:translateX(-50%);font-style:normal;font-size:max(7px,calc(var(--cell) * .11));font-weight:900;font-family:var(--display);letter-spacing:.08em;color:#fff;background:linear-gradient(135deg,#b45309,#7c2d12);padding:1px 6px;border-radius:5px;border:1px solid #fde68a;line-height:1.3;white-space:nowrap}
.bk-tomei{position:relative;width:70%;height:80%;margin-bottom:8%;border-radius:5px 9px 9px 5px;background:linear-gradient(135deg,color-mix(in srgb,var(--ta) 45%,#9a3412) 0%,#5b210a 55%,#2b0f05 100%);box-shadow:inset 0 0 0 2px #fbbf24,inset 0 0 0 4px rgba(43,15,5,.6),inset 7px 0 0 rgba(0,0,0,.35),3px 3px 0 #f5e6c4,5px 5px 0 #c9ad78,6px 7px 8px rgba(40,20,0,.45);display:grid;place-items:center;overflow:hidden}
.bk-tomei::before{content:"";position:absolute;inset:10% 14% 10% 22%;border:1.5px solid rgba(253,230,138,.75);border-radius:4px}
.bk-tomei::after{content:"";position:absolute;top:0;bottom:0;width:40%;left:-60%;background:linear-gradient(100deg,transparent,rgba(255,255,255,.55),transparent);animation:bkshine 3.2s ease-in-out infinite}
@keyframes bkshine{0%,55%{left:-60%}100%{left:130%}}
.bk-tomei span{position:relative;z-index:1;font-size:calc(var(--cell) * .3);width:calc(var(--cell) * .42);height:calc(var(--cell) * .42);margin-left:12%;display:grid;place-items:center;border-radius:50%;background:radial-gradient(circle at 40% 35%,#fef3c7,#f59e0b 55%,#92400e);box-shadow:0 0 0 2px #fde68a,0 0 12px rgba(253,224,71,.8)}
.bk-cell.land .bk-bk{animation:bkbook .55s cubic-bezier(.2,1.6,.4,1)}
@keyframes bkbook{0%{transform:scale(.6) rotate(-10deg)}60%{transform:scale(1.18) rotate(4deg);filter:brightness(1.4)}100%{transform:scale(1)}}

/* wins */
.bk-cell.win .bk-s{animation:bkwin .5s ease-in-out infinite alternate;z-index:2}
.bk-cell.win::before{content:"";position:absolute;inset:5%;border-radius:18%;background:radial-gradient(circle,rgba(255,255,255,.85),color-mix(in srgb,var(--ta) 35%,transparent) 70%);box-shadow:inset 0 0 0 2.5px var(--ta),0 0 18px color-mix(in srgb,var(--ta) 80%,transparent)}
@keyframes bkwin{from{transform:scale(1)}to{transform:scale(1.12)}}
.bk-lines{position:absolute;inset:0;pointer-events:none;z-index:6;overflow:visible}
.bk-lines polyline{fill:none;stroke-width:5;stroke-linecap:round;stroke-linejoin:round;filter:drop-shadow(0 0 5px rgba(255,255,255,.95)) drop-shadow(0 1px 1px rgba(0,0,0,.6));stroke-dasharray:1400;stroke-dashoffset:1400;animation:bkdash .7s ease-out forwards}
.bk-lines.all polyline{stroke-width:3.5;opacity:.9}
@keyframes bkdash{to{stroke-dashoffset:0}}

/* expanding special symbol */
.bk-xp{position:absolute;left:0;right:0;overflow:hidden;z-index:4;border-radius:12px;transition-property:top,height;transition-duration:.52s;transition-timing-function:cubic-bezier(.2,.9,.3,1.12);background:linear-gradient(180deg,#fffbeb,#fde68a 50%,#fbbf24);box-shadow:0 0 0 3px #fde047,0 0 24px rgba(253,224,71,.95),inset 0 0 22px rgba(255,255,255,.85)}
.bk-xp-in{position:absolute;left:0;right:0;transition-property:top;transition-duration:.52s;transition-timing-function:cubic-bezier(.2,.9,.3,1.12)}
.bk-xp-in>div{height:var(--cell);display:grid;place-items:center}
.bk-xp .beam{position:absolute;left:0;right:0;height:40%;top:-40%;background:linear-gradient(180deg,transparent,rgba(255,255,255,.9),transparent);animation:bkbeam 1.1s ease-in-out infinite}
@keyframes bkbeam{to{top:110%}}
.bk-xp.win .bk-xp-in{animation:bkxpw .45s ease-in-out infinite alternate}
@keyframes bkxpw{to{transform:scale(1.06);filter:brightness(1.12)}}

/* mini symbols for messages / paytable */
.bk-mini{display:inline-grid;place-items:center;vertical-align:middle;font-size:1.15em;line-height:1}
.bk-mini.crd{font-family:var(--display);font-weight:900;color:var(--k);-webkit-text-stroke:.6px rgba(0,0,0,.45);font-size:1.05em;letter-spacing:-.04em;min-width:1.2em}
.bk-mini.bkb{width:1.45em;height:1.45em;font-size:.8em;border-radius:3px 5px 5px 3px;background:linear-gradient(135deg,#c2410c,#5b210a);box-shadow:inset 0 0 0 1.5px #fbbf24,2px 2px 0 #f5e6c4}
.bk-pt .e .bk-mini{font-size:28px}.bk-pt .e .bk-mini.bkb{font-size:20px}
.bk-pt small{color:var(--muted);font-weight:700;font-size:11px}

/* free-spins bar */
.bk-fsbar .bk-spec{display:inline-grid;place-items:center;min-width:34px;height:28px;padding:0 6px;border-radius:9px;background:linear-gradient(180deg,#fffbeb,#fbbf24);box-shadow:0 0 0 2px #fff,0 0 14px rgba(253,224,71,.9);font-size:19px;animation:bkspec 1.2s ease-in-out infinite alternate}
@keyframes bkspec{to{box-shadow:0 0 0 2px #fff,0 0 22px rgba(253,224,71,1);transform:scale(1.06)}}

/* ---- book opening overlay ---- */
.bk-ov{position:absolute;inset:0;z-index:23;display:grid;place-items:center;background:radial-gradient(circle at 50% 45%,rgba(120,53,15,.55),rgba(20,8,2,.86) 70%);animation:fade .25s;cursor:pointer;overflow:hidden}
.bk-ov.out{opacity:0;transition:opacity .25s}
.bk-ov-in{display:flex;flex-direction:column;align-items:center;gap:14px;width:100%;padding:0 12px}
.bk-ov-h{font-family:var(--display);font-weight:900;font-size:clamp(30px,5.5vw,54px);color:#fde047;text-shadow:0 5px 0 #7c2d12,0 10px 30px rgba(0,0,0,.5);animation:bwpop .6s cubic-bezier(.2,1.6,.4,1);text-align:center;line-height:1.05}
.bk-ov-f{min-height:44px;color:#fff;font-weight:800;text-align:center;font-size:clamp(14px,2.2vw,18px);text-shadow:0 2px 8px rgba(0,0,0,.5);max-width:440px}
.bk-ov-f small{display:block;font-size:12px;opacity:.75;margin-top:4px;font-weight:700;text-transform:uppercase;letter-spacing:.08em}
.bk-ov-f .bk-mini{font-size:1.5em}
.bk-tome-wrap{position:relative;perspective:1400px;width:min(420px,88vw);aspect-ratio:1.55}
.bk-tome{position:absolute;inset:0;transform-style:preserve-3d;transform:translateX(-25%) rotateX(14deg) scale(.82);transition:transform 1s cubic-bezier(.3,.9,.3,1);animation:bktomein .65s cubic-bezier(.2,1.5,.4,1)}
@keyframes bktomein{from{transform:translateX(-25%) rotateX(14deg) scale(.2) rotate(-20deg);opacity:0}}
.bk-ov.open .bk-tome{transform:translateX(0) rotateX(10deg) scale(1)}
.bk-pg{position:absolute;top:0;bottom:0;width:50%;background:radial-gradient(130% 90% at 30% 50%,#fffbeb,#f5e6c4 60%,#e2c890);box-shadow:inset 14px 0 18px -10px rgba(90,50,10,.55),3px 3px 0 #e8d3a6,6px 6px 0 #d2b680,8px 10px 26px rgba(0,0,0,.5)}
.bk-pg.r{left:50%;border-radius:0 10px 10px 0;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:6px}
.bk-pg-cap{font-family:var(--display);font-weight:900;color:#7c2d12;text-transform:uppercase;letter-spacing:.1em;font-size:clamp(10px,1.6vw,13px);opacity:0;transition:opacity .4s .6s}
.bk-ov.open .bk-pg-cap{opacity:1}
.bk-pick{--cell:min(118px,24vw);width:calc(var(--cell) * 1.08);height:calc(var(--cell) * 1.08);border-radius:18px;display:grid;place-items:center;background:radial-gradient(circle,#fff 0 30%,rgba(251,191,36,.35) 70%);box-shadow:inset 0 0 0 2px rgba(180,83,9,.45),inset 0 0 18px rgba(180,83,9,.25);opacity:0;transform:scale(.6);transition:all .45s .55s cubic-bezier(.2,1.5,.4,1);perspective:400px}
.bk-ov.open .bk-pick{opacity:1;transform:none}
.bk-pick-s{width:var(--cell);height:var(--cell);display:grid;place-items:center}
.bk-pick-s.flip{animation:bkflip .16s ease-out}
@keyframes bkflip{from{transform:rotateY(80deg) scale(.85);opacity:.4}}
.bk-ov.picked .bk-pick{box-shadow:inset 0 0 0 3px #f59e0b,0 0 0 4px #fde047,0 0 40px rgba(253,224,71,1);animation:bkpicked .5s cubic-bezier(.2,1.6,.4,1)}
.bk-ov.picked .bk-pick-s{animation:bkwin .5s ease-in-out infinite alternate}
@keyframes bkpicked{0%{transform:scale(1.35)}100%{transform:scale(1)}}
.bk-cv{position:absolute;top:0;bottom:0;left:50%;width:50%;transform-origin:0 50%;transform-style:preserve-3d;transition:transform 1.05s cubic-bezier(.45,.05,.25,1)}
.bk-ov.open .bk-cv{transform:rotateY(-178deg)}
.bk-cv>div{position:absolute;inset:0;backface-visibility:hidden;-webkit-backface-visibility:hidden}
.bk-cv .fr{border-radius:4px 14px 14px 4px;background:linear-gradient(135deg,color-mix(in srgb,var(--ta) 40%,#9a3412) 0%,#5b210a 55%,#2b0f05 100%);box-shadow:inset 0 0 0 3px #fbbf24,inset 0 0 0 7px rgba(43,15,5,.6),inset 0 0 0 9px rgba(251,191,36,.6),inset 14px 0 0 rgba(0,0,0,.3),6px 8px 26px rgba(0,0,0,.55);display:grid;place-items:center;overflow:hidden}
.bk-cv .fr::after{content:"";position:absolute;top:0;bottom:0;width:35%;left:-50%;background:linear-gradient(100deg,transparent,rgba(255,255,255,.4),transparent);animation:bkshine 2.4s ease-in-out infinite}
.bk-cv .fr span{font-size:clamp(34px,8vw,64px);width:1.7em;height:1.7em;display:grid;place-items:center;border-radius:50%;background:radial-gradient(circle at 40% 35%,#fef3c7,#f59e0b 55%,#92400e);box-shadow:0 0 0 4px #fde68a,0 0 30px rgba(253,224,71,.9);animation:bkemb 1s ease-in-out infinite alternate}
@keyframes bkemb{to{box-shadow:0 0 0 4px #fff7ae,0 0 50px rgba(253,224,71,1)}}
.bk-cv .orn{position:absolute;inset:16px 18px;border:2px solid rgba(253,230,138,.75);border-radius:8px}
.bk-cv .orn::before,.bk-cv .orn::after{content:"";position:absolute;left:50%;width:30%;height:2px;margin-left:-15%;background:rgba(253,230,138,.75)}
.bk-cv .orn::before{top:14%}.bk-cv .orn::after{bottom:14%}
.bk-cv .bk{transform:rotateY(180deg);border-radius:10px 0 0 10px;background:radial-gradient(130% 90% at 70% 50%,#fffbeb,#f5e6c4 60%,#e2c890);box-shadow:inset -14px 0 18px -10px rgba(90,50,10,.55),-3px 3px 0 #e8d3a6,-6px 6px 0 #d2b680}
.bk-pg-l{position:absolute;inset:0;display:flex;flex-direction:column;align-items:center;justify-content:center;text-align:center;padding:10px 14px;color:#7c2d12}
.bk-pg-l b{font-family:var(--display);font-size:clamp(40px,8vw,68px);line-height:.95;color:#b45309;text-shadow:0 2px 0 #fff}
.bk-pg-l small{font-family:var(--display);font-weight:900;letter-spacing:.1em;font-size:clamp(11px,1.8vw,15px)}
.bk-pg-l p{margin:8px 0 0;font-size:clamp(10px,1.5vw,12.5px);font-weight:700;opacity:.85;line-height:1.3}
.bk-rays{position:absolute;left:50%;top:50%;width:160%;aspect-ratio:1;transform:translate(-50%,-50%) scale(.2);opacity:0;pointer-events:none;z-index:-1;border-radius:50%;background:repeating-conic-gradient(rgba(253,224,71,.38) 0 7deg,transparent 7deg 20deg);-webkit-mask:radial-gradient(circle,#000 20%,transparent 68%);mask:radial-gradient(circle,#000 20%,transparent 68%);transition:all .9s .3s}
.bk-ov.open .bk-rays{opacity:1;transform:translate(-50%,-50%) scale(1);animation:bkrays 14s linear infinite}
@keyframes bkrays{to{transform:translate(-50%,-50%) rotate(360deg)}}
.bk-msg small .bk-mini{font-size:1.3em}

/* ---- controls: bonus buy + ante ---- */
.bk-buy{display:flex;align-items:center;gap:10px;width:100%;border:0;cursor:pointer;border-radius:16px;padding:10px 14px;text-align:left;color:#fff;background:linear-gradient(135deg,#b45309,#db2777 60%,#7c3aed);box-shadow:0 8px 22px rgba(219,39,119,.3),inset 0 2px 0 rgba(255,255,255,.35),inset 0 -3px 0 rgba(0,0,0,.18);transition:transform .15s,filter .2s,opacity .2s;position:relative;overflow:hidden}
.bk-buy::after{content:"";position:absolute;top:0;bottom:0;width:30%;left:-40%;background:linear-gradient(100deg,transparent,rgba(255,255,255,.35),transparent);animation:bkshine 3.4s ease-in-out infinite}
.bk-buy:hover:not(:disabled){transform:translateY(-1px);filter:brightness(1.08)}
.bk-buy:disabled{opacity:.45;cursor:not-allowed;filter:grayscale(.5)}
.bk-buy:disabled::after{display:none}
.bk-buy .ic{flex:none;width:38px;height:38px;display:grid;place-items:center;background:rgba(255,255,255,.18);border-radius:12px}
.bk-buy .ic .bk-mini.bkb{font-size:17px}
.bk-buy .tx{display:flex;flex-direction:column;min-width:0}
.bk-buy b{font-family:var(--display);font-weight:900;font-size:15px;letter-spacing:.04em;line-height:1.15}
.bk-buy small{font-weight:800;font-size:13px;opacity:.95;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.bk-ante{position:relative;display:flex;align-items:center;gap:10px;margin:0;padding:9px 12px;border-radius:16px;background:var(--lilac);border:2px solid transparent;cursor:pointer;transition:all .2s;user-select:none}
.bk-ante input{position:absolute;left:0;top:0;width:1px;height:1px;opacity:0;pointer-events:none;margin:0}
.bk-ante .sw{flex:none;width:44px;height:26px;border-radius:20px;background:#d8c9f1;position:relative;transition:background .2s}
.bk-ante .sw i{position:absolute;left:3px;top:3px;width:20px;height:20px;border-radius:50%;background:#fff;box-shadow:0 2px 5px rgba(0,0,0,.25);transition:transform .2s cubic-bezier(.3,1.4,.5,1)}
.bk-ante .tx{display:flex;flex-direction:column;min-width:0}
.bk-ante b{font-family:var(--display);font-weight:900;font-size:14px;color:var(--p-dark);letter-spacing:.03em}
.bk-ante small{font-size:12px;font-weight:700;color:var(--muted)}
.bk-ante.on{background:linear-gradient(135deg,#fef3c7,#fde68a);border-color:#f59e0b;box-shadow:0 6px 18px rgba(245,158,11,.25)}
.bk-ante.on .sw{background:linear-gradient(135deg,#f59e0b,#db2777)}
.bk-ante.on .sw i{transform:translateX(18px)}
.bk-ante.on b{color:#92400e}
.bk-ante.off{opacity:.55;cursor:not-allowed}

/* ---- buy confirm ---- */
.bk-confirm{position:absolute;inset:0;z-index:24;display:grid;place-items:center;background:rgba(30,10,5,.62);backdrop-filter:blur(3px);animation:fade .2s;padding:14px}
.bk-cf{--cell:84px;width:min(360px,100%);background:#fff;border-radius:22px;padding:18px 20px;text-align:center;box-shadow:0 24px 60px rgba(0,0,0,.4);border:3px solid #fbbf24;animation:bwpop .4s cubic-bezier(.2,1.5,.4,1)}
.bk-cf-ico{width:84px;height:84px;margin:-58px auto 4px;display:grid;place-items:center;background:radial-gradient(circle,#fffbeb,#fde68a);border-radius:50%;box-shadow:0 0 0 4px #fff,0 0 24px rgba(251,191,36,.9)}
.bk-cf h3{margin:4px 0 6px;font-size:20px}
.bk-cf p{margin:0 0 14px;color:var(--ink);font-size:14px;line-height:1.45}
.bk-cf-b{display:flex;gap:10px}.bk-cf-b .btn{flex:1}

@media (max-width:760px){
  .bk-wrap{gap:7px}
  .bk-frame{padding:7px;border-radius:18px}
  .bk-frame::before,.bk-frame::after{width:16px;height:16px;margin-top:-8px;border-width:2px}
  .bk-frame::before{left:-7px}.bk-frame::after{right:-7px}
  .bk-reels{gap:4px;padding:4px;border-radius:12px}
  .bk-reel{border-radius:9px}
  .bk-lines polyline{stroke-width:3.5}
  .bk-fsbar .bk-spec{min-width:28px;height:24px;font-size:16px}
  .bk-tome-wrap{width:min(340px,90vw)}
  .bk-ov-in{gap:10px}
  .bk-buy{padding:9px 12px}
}
.bk-fsbar .bk-spec .bk-mini{font-size:19px;letter-spacing:0}
.bk-fsbar .bk-spec .bk-mini.crd{color:var(--k);font-size:18px}
@media (max-width:760px){.bk-fsbar .bk-spec .bk-mini{font-size:16px}.bk-fsbar .bk-spec .bk-mini.crd{font-size:15px}}