.abacus-plugin-instance{--wood-dark:#3e2417;--wood-mid:#6b3f22;--wood-light:#8a5a34;--frame-edge:#241209;--rod-color:#d8bc8f;--heaven-1:#e0a94a;--heaven-2:#8a5a10;--earth-1:#b04d35;--earth-2:#5e2015;--screen-bg:#101a14;--screen-fg:#7CFC9A;--paper:#f4ead9;--bead-shape:50%;--bead-clip:none;font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,sans-serif;width:100%;margin:1.5em auto;box-sizing:border-box;user-select:none;-webkit-user-select:none;touch-action:manipulation}.abacus-plugin-instance *{box-sizing:border-box}.abacus-plugin-instance[data-theme="rosewood"]{--wood-dark:#4a1414;--wood-mid:#7a2626;--wood-light:#9a3b3b;--frame-edge:#2c0c0c;--rod-color:#e6c6a0}.abacus-plugin-instance[data-theme="ebony"]{--wood-dark:#171512;--wood-mid:#2b2723;--wood-light:#403a33;--frame-edge:#0a0908;--rod-color:#b9a37c}.abacus-plugin-instance[data-theme="classic"]{--wood-dark:#141414;--wood-mid:#1c1c1c;--wood-light:#262626;--frame-edge:#050505;--rod-color:#3a3a3a;--heaven-1:#f0742a;--heaven-2:#9c3d10;--earth-1:#f0742a;--earth-2:#9c3d10;--bead-clip:polygon(18% 0%, 82% 0%, 100% 50%, 82% 100%, 18% 100%, 0% 50%)}.ap-toolbar{display:flex;align-items:center;justify-content:space-between;gap:8px;padding:0 2px 8px;flex-wrap:wrap}.ap-btn{appearance:none;border:1px solid var(--wood-mid);background:var(--paper);color:var(--wood-dark);font-size:13px;font-weight:600;padding:8px 14px;border-radius:8px;cursor:pointer;display:inline-flex;align-items:center;gap:6px;line-height:1}.ap-btn:hover{filter:brightness(.97)}.ap-btn:active{transform:scale(.96)}.ap-fs-icon{width:11px;height:11px;display:inline-block;border:2px solid var(--wood-dark);border-radius:2px}.ap-sound-icon{font-size:16px;line-height:1}.ap-btn-prominent{font-size:14px;padding:10px 16px;border-width:2px;border-radius:10px;box-shadow:0 2px 4px rgb(0 0 0 / .15)}.ap-btn.ap-sound{background:#2f8f4e;border-color:#1f6b38;color:#fff}.ap-btn.ap-sound:hover{background:#357f47}.ap-btn.ap-sound.muted{background:#8a8f94;border-color:#6d7276;color:#fff}.ap-btn.ap-sound.muted:hover{background:#7c8388}.ap-pause{appearance:none;border:1px solid rgb(255 255 255 / .25);background:rgb(255 255 255 / .08);color:var(--screen-fg);font-size:11px;font-weight:700;letter-spacing:.5px;text-transform:uppercase;padding:6px 10px;border-radius:6px;cursor:pointer;display:inline-flex;align-items:center;gap:5px;flex:0 0 auto}.ap-pause:hover{background:rgb(255 255 255 / .14)}.ap-pause-icon{width:9px;height:11px;display:inline-block;position:relative}.ap-pause-icon::before,.ap-pause-icon::after{content:"";position:absolute;top:0;bottom:0;width:3px;background:var(--screen-fg)}.ap-pause-icon::before{left:0}.ap-pause-icon::after{right:0}.ap-pause.is-paused .ap-pause-icon{border-left:9px solid var(--screen-fg);border-top:5.5px solid #fff0;border-bottom:5.5px solid #fff0;width:0;height:0}.ap-pause.is-paused .ap-pause-icon::before,.ap-pause.is-paused .ap-pause-icon::after{content:none}.ap-practice-icon{width:10px;height:10px;display:inline-block;border-radius:50%;border:2px solid var(--wood-dark);position:relative}.ap-practice-icon::after{content:"";position:absolute;left:50%;top:-4px;width:2px;height:5px;background:var(--wood-dark);transform:translateX(-50%)}.ap-btn.ap-practice-toggle[aria-pressed="true"]{background:var(--wood-dark);color:var(--paper)}.ap-btn.ap-practice-toggle[aria-pressed="true"] .ap-practice-icon,.ap-btn.ap-practice-toggle[aria-pressed="true"] .ap-practice-icon::after{border-color:var(--paper);background-color:var(--paper)}.ap-practice-panel{background:#fffaf1;border:1px solid var(--wood-mid);border-radius:10px;padding:12px 14px;margin-bottom:10px}.ap-practice-row{display:flex;align-items:flex-end;justify-content:space-between;gap:10px;flex-wrap:wrap}.ap-practice-target{display:flex;flex-direction:column;gap:2px}.ap-practice-target .ap-label{font-size:11px;letter-spacing:1px;color:var(--wood-mid);font-weight:700;text-transform:uppercase}.ap-target-value{font-family:"Courier New",monospace;font-size:clamp(22px,5vw,30px);font-weight:700;color:var(--wood-dark);letter-spacing:1px}.ap-practice-difficulty{font-size:12px;font-weight:600;color:var(--wood-mid);display:flex;align-items:center;gap:6px}.ap-practice-difficulty select{font-size:13px;padding:4px 6px;border-radius:6px;border:1px solid var(--wood-mid);background:#fff}.ap-practice-actions{display:flex;gap:8px;flex-wrap:wrap;margin-top:10px}.ap-practice-feedback{margin-top:8px;font-size:13px;font-weight:700;min-height:1.2em}.ap-practice-feedback.correct{color:#1c7d3e}.ap-practice-feedback.incorrect{color:#a3271c}.ap-screen{background:var(--screen-bg);border-radius:10px;padding:14px 16px;margin-bottom:10px;box-shadow:inset 0 2px 10px rgb(0 0 0 / .65),inset 0 0 0 1px rgb(255 255 255 / .03);display:flex;align-items:center;justify-content:space-between;gap:10px;flex-wrap:wrap}.ap-screen .ap-label-value{display:flex;flex-direction:column;gap:2px}.ap-screen .ap-label{font-size:11px;letter-spacing:1.5px;color:#4c8a5e;font-weight:700;text-transform:uppercase}.ap-screen .ap-value{font-family:"Courier New",monospace;font-size:clamp(24px,6vw,34px);font-weight:700;color:var(--screen-fg);text-shadow:0 0 6px rgb(124 252 154 / .55);letter-spacing:1px;word-break:break-all}.ap-screen.ap-screen-frozen .ap-value{color:rgb(124 252 154 / .18);text-shadow:none}.ap-screen.ap-screen-frozen::after{content:"live count paused";font-size:11px;color:rgb(255 255 255 / .4);font-style:italic}.ap-frame{position:relative;background:repeating-linear-gradient(95deg,rgb(0 0 0 / .06) 0,transparent 3px,transparent 7px),linear-gradient(180deg,var(--wood-light),var(--wood-mid) 45%,var(--wood-dark) 100%);border:10px solid var(--frame-edge);border-radius:10px;padding:16px 10px 20px;box-shadow:0 10px 24px rgb(0 0 0 / .4),inset 0 0 30px rgb(0 0 0 / .35),inset 0 2px 0 rgb(255 255 255 / .06)}.ap-frame::before,.ap-frame::after{content:"";position:absolute;width:8px;height:8px;border-radius:50%;background:radial-gradient(circle at 35% 30%,#f3d98b,#8a6a2a 80%);box-shadow:0 1px 2px rgb(0 0 0 / .6);top:-4px}.ap-frame::before{left:-4px}.ap-frame::after{right:-4px}.ap-bar{position:absolute;left:8px;right:8px;top:var(--bar-top,62px);height:9px;background:linear-gradient(180deg,#171310,#000);box-shadow:0 2px 5px rgb(0 0 0 / .65),inset 0 1px 0 rgb(255 255 255 / .08);border-radius:3px;z-index:3}.ap-bar-dot{position:absolute;top:50%;width:5px;height:5px;border-radius:50%;background:#f2f2f2;box-shadow:0 0 2px rgb(0 0 0 / .6);transform:translate(-50%,-50%)}.ap-bar-dot-unit{width:7px;height:7px;background:#fff;box-shadow:0 0 0 2px rgb(255 255 255 / .25),0 0 3px rgb(0 0 0 / .6)}.ap-rod-unit::before{content:"";position:absolute;top:0;bottom:0;left:0;right:0;background:rgb(255 255 255 / .035);pointer-events:none}.ap-rods{position:relative;display:flex;justify-content:space-between;gap:2px}.ap-rod{position:relative;flex:1 1 0%;min-width:0;display:flex;flex-direction:column;align-items:center}.ap-rod-stick{position:absolute;top:0;bottom:0;left:50%;width:4px;transform:translateX(-50%);background:linear-gradient(90deg,#5c3d20,var(--rod-color) 45%,#5c3d20);border-radius:2px;box-shadow:0 0 2px rgb(0 0 0 / .5)}.ap-heaven-zone,.ap-earth-zone{position:relative;width:100%;display:flex;flex-direction:column;align-items:center;z-index:2}.ap-heaven-zone{height:44px;justify-content:flex-start}.ap-earth-zone{height:112px;justify-content:flex-end}.ap-bead{width:clamp(14px,7vw,26px);height:clamp(11px,5.5vw,20px);border-radius:var(--bead-shape);clip-path:var(--bead-clip);position:relative;cursor:pointer;transition:transform 0.15s cubic-bezier(.4,0,.2,1),filter 0.1s ease;flex:0 0 auto}.ap-bead::before{content:"";position:absolute;left:0;right:0;top:50%;height:1px;background:rgb(0 0 0 / .18);transform:translateY(-50%)}.ap-bead::after{content:"";position:absolute;top:14%;left:20%;width:34%;height:22%;background:rgb(255 255 255 / .6);border-radius:50%;filter:blur(1px)}.ap-bead.heaven{background:radial-gradient(circle at 35% 30%,var(--heaven-1),var(--heaven-2) 78%);box-shadow:0 2px 3px rgb(0 0 0 / .55),inset 0 -2px 3px rgb(0 0 0 / .25)}.ap-bead.earth{background:radial-gradient(circle at 35% 30%,var(--earth-1),var(--earth-2) 78%);box-shadow:0 2px 3px rgb(0 0 0 / .55),inset 0 -2px 3px rgb(0 0 0 / .25)}.ap-bead.pressed{filter:brightness(.9)}.ap-bead.touching{filter:brightness(1.08)}.ap-bead{transform-origin:center center}.ap-bead.touching{will-change:transform}.ap-placevalue{margin-top:6px;font-size:9px;color:rgb(255 255 255 / .35);font-family:monospace}.ap-rod-unit .ap-placevalue{color:rgb(255 255 255 / .65);font-weight:700}.abacus-plugin-instance:fullscreen,.abacus-plugin-instance:-webkit-full-screen{max-width:100%;width:100%;height:100%;background:#1b100a;display:flex;flex-direction:column;justify-content:center;padding:16px;margin:0}.abacus-plugin-instance:fullscreen .ap-frame,.abacus-plugin-instance:-webkit-full-screen .ap-frame{flex:1;display:flex;align-items:center}.abacus-plugin-instance:fullscreen .ap-rods,.abacus-plugin-instance:-webkit-full-screen .ap-rods{width:100%}@media (max-width:480px){.ap-screen .ap-value{font-size:22px}.ap-btn{padding:7px 10px;font-size:12px}}@media (prefers-reduced-motion:reduce){.ap-bead{transition:none}}.ap-live{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}.ap-bead:focus{outline:3px solid #1d6fe8;outline-offset:3px;z-index:5}.ap-tutor-on .ap-placevalue{opacity:1;transform:translateY(-2px) scale(1.04);font-weight:800}.ap-practice-progress{display:flex;gap:12px;flex-wrap:wrap;align-items:center;justify-content:center;margin:8px 0;font-size:12px;font-weight:700;color:#5b4636}.ap-practice-progress span{background:#fff;border:1px solid #e4d4bd;border-radius:999px;padding:5px 9px}.ap-btn.ap-undo,.ap-btn.ap-redo{min-width:78px}@media(max-width:640px){.ap-toolbar{gap:6px}.ap-toolbar .ap-btn{font-size:11px;padding:7px 9px}.ap-practice-progress{font-size:11px;gap:6px}}.abacus-plugin-instance{width:100%;max-width:100%;min-width:0;overflow:visible}.abacus-plugin-instance .ap-frame{width:100%;max-width:100%;min-width:0;overflow:hidden}.abacus-plugin-instance .ap-rods{width:100%;min-width:0}.ap-toolbar{width:100%}.ap-toolbar .ap-btn{max-width:100%}@media (max-width:767px){.abacus-plugin-instance{width:100%!important;max-width:100%!important;margin-left:auto;margin-right:auto}.abacus-plugin-instance .ap-frame{border-width:6px;border-radius:8px;padding:12px 5px 15px}.abacus-plugin-instance .ap-bar{left:5px;right:5px;height:7px}.abacus-plugin-instance .ap-heaven-zone{height:36px}.abacus-plugin-instance .ap-earth-zone{height:88px}.abacus-plugin-instance .ap-bead{width:clamp(9px,4.2vw,21px);height:clamp(8px,3.5vw,17px)}.abacus-plugin-instance .ap-rod-stick{width:3px}.abacus-plugin-instance .ap-placevalue{font-size:8px;margin-top:4px}.abacus-plugin-instance .ap-screen{padding:10px 11px}.abacus-plugin-instance .ap-screen .ap-value{font-size:clamp(20px,7vw,28px)}.abacus-plugin-instance .ap-toolbar{justify-content:flex-start}.abacus-plugin-instance .ap-toolbar .ap-btn{flex:0 1 auto;min-height:36px;padding:7px 9px}}@media (max-width:380px){.abacus-plugin-instance .ap-frame{padding-left:3px;padding-right:3px}.abacus-plugin-instance .ap-bar{left:3px;right:3px}.abacus-plugin-instance .ap-bead{width:clamp(8px,3.9vw,16px);height:clamp(7px,3.2vw,14px)}.abacus-plugin-instance .ap-placevalue{font-size:7px}.abacus-plugin-instance .ap-toolbar .ap-btn{font-size:10px;padding:6px 7px}}