.sor{--b:34px;--w:calc(var(--b) * 1.589);--p:calc(var(--b) * 1.06);--f:calc(var(--b) * .36);--beam:calc(var(--b) * .32);--col:calc(var(--w) * 1.16);-webkit-user-select:none;user-select:none;-webkit-tap-highlight-color:transparent;max-width:100%;display:inline-block;position:relative}.sor--hero{--b:31px}.sor--lesson{--b:34px}.sor--mini{--b:7px}@media (min-width:640px){.sor--hero,.sor--lesson{--b:40px}}@media (min-width:1024px){.sor--hero{--b:clamp(44px, 3.75vw, 62px)}.sor--lesson{--b:44px}}.sor:after{content:"";z-index:-1;left:4%;right:4%;bottom:calc(var(--b) * -.55);height:calc(var(--b) * 1.1);pointer-events:none;background:radial-gradient(closest-side,#101b2d42,#101b2d14 60%,#0000);transition:opacity .7s;position:absolute}.sor--mini:after{display:none}.sor--fade .sor-body,.sor--fade:after{-webkit-mask-image:linear-gradient(90deg,#0000 0,#000 34%);mask-image:linear-gradient(90deg,#0000 0,#000 34%)}.sor-body{padding:var(--f);transform:perspective(1500px) rotateX(var(--sor-rx,0deg)) 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.7s;position:absolute;left:50%;transform:translate(-50%)}.sor-beam{z-index:1;left:var(--f);right:var(--f);top:calc(var(--f) + var(--b) + var(--p));height:var(--beam);box-shadow:0 calc(var(--b) * .06) calc(var(--b) * .12) #0a060359;background:linear-gradient(#fff0d229,#fff0d200 35%,#00000047),linear-gradient(#3a2417,#23140c);transition:opacity .7s;position:absolute}.sor-dot{z-index:2;left:50%;top:calc(var(--b) + var(--p) + var(--beam) / 2);width:calc(var(--b) * .15);height:calc(var(--b) * .15);background:radial-gradient(circle at 35% 30%,#fbe8b4,#b48c3e 60%,#6e5222);border-radius:50%;transition:opacity .7s;position:absolute;transform:translate(-50%,-50%)}.sor-ring{z-index:3;padding:var(--f);border-radius:calc(var(--b) * .1);-webkit-mask-composite:xor;pointer-events:none;background:linear-gradient(#ffeccd2e,#ffeccd00 22%,#0000 74%,#00000052),repeating-linear-gradient(90deg,#ffffff06 0 2px,#00000009 2px 5px),linear-gradient(#3d2619,#2a1810 48%,#1d100a);transition:opacity .7s;position:absolute;inset:0;-webkit-mask:linear-gradient(#000 0 0) content-box,linear-gradient(#000 0 0);-webkit-mask-composite:xor,source-over;mask:linear-gradient(#000 0 0) content-box exclude,linear-gradient(#000 0 0)}.sor-bead{z-index:2;left:50%;top:calc((var(--b) - var(--p)) / 2);width:var(--col);height:var(--p);margin-left:calc(var(--col) / -2);translate:0 calc(var(--t,0) * var(--p));transition:translate .5s cubic-bezier(.34,1.45,.64,1),opacity .7s,filter .7s;transition-timing-function:linear(0, .0508, .1747, .3279, .4922, .6406, .772, .8741, .9509, 1.0057, 1.039, 1.057, 1.0627, 1.0605, 1.0535, 1.0441, 1.0338, 1.0242, 1.0157, 1.009, 1.0037, 1.0002, .9978, .9966, .9961, .9961, .9965, .9971, .9978, .9984, 1), ease, ease;touch-action:manipulation;position:absolute}.sor-bead:before,.sor-bead:after{content:"";background:url(/soroban/bead-wood-a.webp) center / var(--w) var(--b) no-repeat;position:absolute;inset:0}.sor-bead.is-b:before{background-image:url(/soroban/bead-wood-b.webp)}.sor-bead:after{opacity:0;background-image:url(/soroban/bead-gold.webp);transition:opacity .24s .11s}.sor-bead[data-on=true]:after{opacity:1}[data-theme=dark] .sor-bead:before{background-image:url(/soroban/bead-wood-a-dark.webp)}[data-theme=dark] .sor-bead.is-b:before{background-image:url(/soroban/bead-wood-b-dark.webp)}[data-theme=dark] .sor-ring{background:linear-gradient(#ffeccd33,#ffeccd00 22%,#0000 74%,#0000004d),repeating-linear-gradient(90deg,#ffffff08 0 2px,#0000000a 2px 5px),linear-gradient(#4a2f1f,#352015 48%,#26160d)}.sor .sor-rod:not(.is-active) .sor-bead{pointer-events:none}.sor.is-live .sor-rod.is-active .sor-bead{cursor:grab}.sor.is-live .sor-rod.is-active .sor-bead:active{cursor:grabbing}@media (hover:hover) and (pointer:fine){.sor.is-live .sor-rod.is-active .sor-bead:hover:before,.sor.is-live .sor-rod.is-active .sor-bead:hover:after{filter:brightness(1.07)saturate(1.05)}}.sor-rod.is-hint:after{content:"";z-index:4;inset:calc(var(--b) * -.2) calc(var(--col) * .03);box-shadow:0 0 0 3px #c99a2e38, 0 0 calc(var(--b) * .6) #d4aa468c, inset 0 0 calc(var(--b) * .4) #d4aa4640;pointer-events:none;border:3px solid #c99a2e;border-radius:999px;animation:1.3s ease-in-out infinite sor-hint;position:absolute}.sor-rod.is-hint-heaven .sor-deck--heaven .sor-bead{animation:1.6s ease-in-out infinite sor-hint-glow}@keyframes sor-hint{0%,to{opacity:.55;transform:scale(1)}50%{opacity:1;transform:scale(1.025)}}.sor.has-tags{padding-top:calc(var(--b) * .95)}.sor-tag{z-index:6;left:50%;bottom:calc(100% + var(--f) + calc(var(--b) * .12));background:var(--estate-ink,#101b2d);color:#f0d796;font-family:var(--font-sans,inherit);font-size:var(--type-xs);letter-spacing:.02em;white-space:nowrap;pointer-events:none;border-radius:999px;padding:.3rem .7rem;font-weight:700;line-height:1.2;animation:.32s cubic-bezier(.23,1,.32,1) both sor-tag-in,1.3s ease-in-out .32s infinite sor-tag-bob;position:absolute;transform:translate(-50%);box-shadow:0 8px 18px -8px #101b2d99}.sor-tag:after{content:"";border:5px solid #0000;border-top-color:var(--estate-ink,#101b2d);position:absolute;top:100%;left:50%;transform:translate(-50%)}[data-theme=dark] .sor-tag{color:#101b2d;background:#f0d796}[data-theme=dark] .sor-tag:after{border-top-color:#f0d796}@keyframes sor-tag-in{0%{opacity:0;transform:translate(-50%,6px)}to{opacity:1;transform:translate(-50%)}}@keyframes sor-tag-bob{0%,to{transform:translate(-50%)}50%{transform:translate(-50%,-3px)}}@keyframes sor-hint-glow{0%,to{filter:drop-shadow(0 0 #f0cf8600)}50%{filter:drop-shadow(0 0 calc(var(--b) * .35) #f0cf86d9)}}.sor.is-mind .sor-ring,.sor.is-mind .sor-beam,.sor.is-mind .sor-axle,.sor.is-mind .sor-dot,.sor.is-mind .sor-bead[data-on=false]{opacity:.05}.sor.is-mind:after{opacity:.15}.sor.is-mind .sor-bead[data-on=true]{filter:drop-shadow(0 0 calc(var(--b) * .3) #f0cf8699);animation:3.2s ease-in-out infinite alternate sor-float}@keyframes sor-float{0%{transform:translateY(calc(var(--b) * -.05))}to{transform:translateY(calc(var(--b) * .05))}}@media (prefers-reduced-motion:reduce){.sor-body,.sor-bead,.sor-bead:after{transition:none}.sor.is-mind .sor-bead[data-on=true],.sor-tag,.sor-rod.is-hint:after,.sor-rod.is-hint-heaven .sor-deck--heaven .sor-bead{animation:none}}.aq{position:relative}.aq-q{font-size:var(--type-h2);color:var(--foreground);line-height:1.12}.aq-hint{font-size:var(--type-sm);color:var(--foreground-secondary);margin-top:.5rem;line-height:1.6}.aq-hint-lead{display:block}.aq-rules{flex-wrap:wrap;gap:.25rem 1rem;margin-top:.25rem;display:flex}.aq-rule{white-space:nowrap;color:var(--foreground-muted);align-items:center;gap:.5rem;display:inline-flex}.aq-rule:before{content:"";background:var(--estate-gold,#a07c2f);width:5px;height:5px;transform:rotate(45deg)}.aq-readout{border-top:1px solid var(--estate-gold-soft,var(--border));border-bottom:1px solid var(--border);align-items:center;gap:1rem;min-height:4.25rem;margin-top:1rem;padding:.5rem 0;display:flex}.aq-num{min-width:2ch;font-size:var(--type-h1);text-align:center;color:var(--foreground-muted);font-variant-numeric:lining-nums tabular-nums;flex:none;line-height:1;transition:color .24s,transform .24s cubic-bezier(.23,1,.32,1)}.aq-num.is-ok{color:var(--estate-gold-text,#7d5f1f)}.aq-num.is-demo{color:color-mix(in srgb, var(--foreground-muted) 70%, transparent)}.aq-status{font-size:var(--type-sm);color:var(--foreground-secondary);text-wrap:pretty;line-height:1.45;position:relative}.aq-status-hidden{visibility:hidden}.aq-status-demo{color:var(--foreground-muted);font-style:italic;position:absolute;inset:0}.aq-cta{color:#fff;width:100%;min-height:3.35rem;font-size:var(--type-sm);letter-spacing:.06em;text-transform:uppercase;text-align:center;cursor:pointer;-webkit-tap-highlight-color:transparent;border-radius:999px;justify-content:center;align-items:center;gap:.5rem;margin-top:1rem;padding:1rem 1.5rem;font-weight:700;transition:transform .16s cubic-bezier(.23,1,.32,1),box-shadow .2s;display:flex}.aq-cta:active{transform:scale(.98)}.aq-cta:focus-visible{outline:2px solid var(--estate-ink,#101b2d);outline-offset:3px}[data-theme=dark] .aq-cta:focus-visible{outline-color:var(--estate-gold)}.aq-foot{font-size:var(--type-sm);color:var(--foreground-secondary);justify-content:space-between;align-items:center;gap:1rem;margin-top:.75rem;display:flex}.aq-link{color:var(--foreground-secondary);text-decoration:underline;-webkit-text-decoration-color:var(--estate-gold-soft,var(--border));text-decoration-color:var(--estate-gold-soft,var(--border));text-underline-offset:4px;cursor:pointer;padding:.25rem 0;font-weight:700}.aq-link:hover{color:var(--foreground);-webkit-text-decoration-color:var(--estate-gold,currentColor);text-decoration-color:var(--estate-gold,currentColor)}.aq-foot-note{color:var(--foreground-muted)}.aq-sound{border:1px solid var(--border);min-height:2rem;font-size:var(--type-xs);color:var(--foreground-secondary);cursor:pointer;border-radius:999px;align-items:center;gap:.25rem;padding:0 .5rem;font-weight:700;transition:border-color .2s,color .2s;display:inline-flex}.aq-sound:hover{color:var(--foreground);border-color:var(--estate-gold-soft,var(--border))}.aq-sound:focus-visible{outline:2px solid var(--estate-gold,#a07c2f);outline-offset:2px}@media (max-width:639px){.aq-readout{min-height:3.6rem;margin-top:.75rem}.aq-num{font-size:var(--type-h1)}}.aq-help{border-left:2px solid var(--estate-gold,#a07c2f);background:color-mix(in srgb, var(--estate-gold,#a07c2f) 7%, transparent);margin-top:1rem;padding:.75rem}.aq-help-lead{font-size:var(--type-sm);color:var(--foreground);font-weight:700}.aq-help-links{font-size:var(--type-sm);color:var(--foreground-muted);flex-wrap:wrap;align-items:center;gap:.25rem .5rem;margin-top:.25rem;display:flex}.aq-help-links .aq-link{color:var(--accent-text)}.aq>.aq-foot-note{font-size:var(--type-sm);color:var(--foreground-muted);margin-top:.75rem}.aq>.aq-sound{margin-top:.75rem}.aq-ages{font-size:var(--type-sm);color:var(--foreground-secondary);margin-top:.5rem;line-height:1.5}.estate-booked-note{border:1px solid var(--estate-gold-soft,var(--border));background:color-mix(in srgb, var(--estate-gold,#a07c2f) 6%, transparent);text-align:left;align-items:flex-start;gap:1rem;padding:1rem 1.25rem;display:flex}.estate-booked-note-beads{flex:none;display:inline-flex}.estate-booked-note-title{font-size:var(--type-h3);color:var(--foreground);line-height:1.15}.estate-booked-note-line{font-size:var(--type-sm);color:var(--foreground-secondary);margin-top:.5rem;line-height:1.55}.estate-booked-note.is-compact .estate-booked-note-title{font-size:var(--type-lg)}.aq-booked{border-left:2px solid var(--estate-gold,#a07c2f);background:color-mix(in srgb, var(--estate-gold,#a07c2f) 7%, transparent);font-size:var(--type-sm);color:var(--foreground);margin-top:1rem;padding:.5rem .75rem;font-weight:700}[data-sor-skin=classic] .sor .sor-bead:before,[data-sor-skin=classic] .sor .sor-bead:after{width:calc(var(--b) * 1.5);height:calc(var(--b) * .96);background:radial-gradient(at 35% 30%,#475569 0%,#334155 50%,#1e293b 100%);border:1px solid #0006;border-radius:50%;inset:50% auto auto 50%;transform:translate(-50%,-50%);box-shadow:0 2px 4px #0000004d,inset 0 1px 1px #ffffff1a}[data-sor-skin=classic] .sor .sor-bead:after{background:radial-gradient(at 35% 30%,#2563eb 0%,#1e40af 50%,#1e3a8a 100%);box-shadow:0 2px 4px #1e40af66,inset 0 1px 1px #ffffff26}[data-sor-skin=classic] .sor--mini .sor-bead:before,[data-sor-skin=classic] .sor--mini .sor-bead:after{box-shadow:none;border:0}[data-sor-skin=classic] .sor .sor-body{background:linear-gradient(#f5e6c8 0%,#e8d5a8 100%);transform:none}[data-sor-skin=classic] .sor .sor-ring,[data-theme=dark] [data-sor-skin=classic] .sor .sor-ring{background:linear-gradient(#5a3825 0%,#7a4a2f 50%,#5a3825 100%);border-radius:0}[data-sor-skin=classic] .sor .sor-beam{background:linear-gradient(#4a2f1f 0%,#2a1810 50%,#4a2f1f 100%);box-shadow:0 1px 2px #0006,inset 0 1px #ffffff1a}[data-sor-skin=classic] .sor .sor-axle{background:linear-gradient(#b8954f 0%,#8a6d3b 50%,#b8954f 100%)}[data-sor-skin=classic] .sor .sor-dot{background:#d4c08a;box-shadow:0 1px 1px #0006}[data-sor-skin=classic] .sor:after{background:radial-gradient(closest-side,#0003,#0000)}@media (max-width:639px){.aq-help{background:0 0;border:0;flex-wrap:wrap;align-items:center;gap:0 .5rem;margin-top:.5rem;padding:0;display:flex}.aq-help-lead{color:var(--foreground-muted);font-weight:400}.aq-help-links{gap:0 1rem;margin-top:0}.aq-help-links>span[aria-hidden]{display:none}.aq-help-links .aq-link{align-items:center;min-height:2.5rem;display:inline-flex}.aq>.aq-sound{justify-content:center;width:2.75rem;min-height:2.75rem;margin:0;padding:0;position:absolute;top:0;right:0}.aq-sound-label{clip:rect(0 0 0 0);white-space:nowrap;width:1px;height:1px;position:absolute;overflow:hidden}.aq-q{padding-right:3rem}}.sor-cap,.sor-readout{display:none}@media (max-width:1023px){.sor.has-caps{margin-top:2.4rem;margin-bottom:3.3rem}.sor.has-caps.has-tags{margin-top:2.4rem}.sor-cap{pointer-events:none;display:block;position:absolute;bottom:calc(100% + .55rem);left:0;right:0}.sor-readout{z-index:4;pointer-events:none;justify-content:center;display:flex;position:absolute;top:calc(100% - .3rem);left:0;right:0}.sor--fade .sor-readout{justify-content:flex-end}.sor--fade .sor-cap{text-align:right}}.aqb-ask{font-size:var(--type-sm,.875rem);color:var(--foreground-secondary);text-wrap:balance;line-height:1.35;display:block}.aqb-ask-q{color:var(--foreground);font-size:1.15rem;font-weight:600}.aqb{background:var(--surface,#fffdf8);border:1px solid var(--estate-gold-soft,var(--border));border-radius:999px;align-items:center;gap:.65rem;width:min(21.5rem,100vw - 2.5rem);height:3.35rem;padding:.4rem .95rem .4rem .4rem;display:inline-flex;box-shadow:0 12px 26px -16px #101b2d8c,0 2px 6px -3px #101b2d2e}.aqb-num{background:var(--estate-ink,#101b2d);color:#fff;font-variant-numeric:lining-nums tabular-nums;border-radius:999px;flex:none;place-items:center;min-width:2.35rem;height:2.35rem;padding:0 .35rem;font-size:1.45rem;font-weight:600;line-height:1;animation:.38s cubic-bezier(.23,1,.32,1) aqb-pop;display:grid}.aqb.is-ok .aqb-num{background:var(--estate-gold-text,#7d5f1f)}.aqb.is-demo .aqb-num{background:color-mix(in srgb, var(--foreground-muted) 75%, transparent)}.aqb-text{-webkit-line-clamp:2;font-size:var(--type-sm,.875rem);color:var(--foreground);text-wrap:pretty;-webkit-box-orient:vertical;font-weight:600;line-height:1.3;display:-webkit-box;overflow:hidden}.aqb.is-demo .aqb-text{color:var(--foreground-secondary);font-style:italic;font-weight:500}@keyframes aqb-pop{0%{opacity:.4;transform:scale(.82)}to{opacity:1;transform:scale(1)}}@media (max-width:1023px){.aq--board .aq-q,.aq--board .aq-hint-lead,.aq--board .aq-readout{clip:rect(0 0 0 0);white-space:nowrap;border:0;width:1px;height:1px;margin:-1px;padding:0;overflow:hidden;position:absolute!important}.aq--board .aq-hint{padding-right:3.25rem}}@media (prefers-reduced-motion:reduce){.aqb-num{animation:none}}