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var(--ep-border-strong);border-radius:var(--vn-r);background:var(--ep-surface-soft);justify-content:center;align-items:center;min-width:0;min-height:110px;padding:8px;display:flex;position:relative}.vn-cell[data-armed=true]{border-color:var(--ep-primary);background:var(--ep-primary-tint)}.vn-cell[data-over=true]{box-shadow:0 0 0 3px var(--ep-primary-ring);border-style:solid}.vn-place{border-radius:inherit;cursor:default;width:100%;height:100%;color:var(--ep-ink-3);font-family:var(--ep-font);background:0 0;border:0;justify-content:center;align-items:flex-end;margin:0;padding:0;font-size:14px;font-weight:800;display:flex;position:absolute;inset:0}.vn-place:not(:disabled){cursor:pointer;color:var(--ep-primary-dark)}.vn-place-text{pointer-events:none;padding-bottom:6px}.vn-cell[data-has=true] .vn-place-text{display:none}.vn-cell[data-has=true][data-armed=true] .vn-place-text{display:block}.vn-cell 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var(--ep-success-border);border-radius:var(--ep-r-md);padding:var(--ep-s3);flex-wrap:wrap;display:flex}.cf-final-label{font-size:var(--ep-fs-meta);text-transform:uppercase;letter-spacing:.04em;color:var(--ep-success);font-weight:800}.cf-final-text{min-width:180px;color:var(--ep-ink);flex:1;font-size:19px;font-weight:700;line-height:1.4}@media (prefers-reduced-motion:reduce){.cf-tok{transition:none}.cf-tok[data-state=wrong]{animation:none}}@media (max-width:640px){.cf-actions .ep-btn{width:100%}}
.pc-stage{box-sizing:border-box;background:var(--ep-surface);border:1px solid var(--ep-border);border-radius:var(--ep-r-lg);touch-action:manipulation;width:100%;max-width:440px;margin:0 auto;position:relative;overflow:hidden}.pc-stage[data-placeholder=true]{border-style:dashed;border-color:var(--ep-border-strong)}.pc-svg{-webkit-user-select:none;user-select:none;-webkit-touch-callout:none;width:100%;height:100%;display:block}.pc-temp{pointer-events:none;border:1px dashed var(--ep-border-strong);font:700 11px/1.5 var(--ep-font);color:var(--ep-ink-3);letter-spacing:.02em;background:#ffffffe6;border-radius:999px;padding:1px 8px;position:absolute;bottom:6px;left:8px}.pp-msgrow{justify-content:center;align-items:center;gap:10px;display:flex}.pp-msgrow .sb-msg{flex:1;min-width:0}.pp-count{text-align:center;color:var(--ep-ink-2);margin:0;font-size:15px;font-weight:800}.pp-part{cursor:pointer;outline:none}.pp-hit{fill:#0000;stroke:#0000;stroke-linejoin:round;stroke-linecap:round;pointer-events:all}.pp-ring{fill:none;stroke:none;stroke-width:1.8px;stroke-linejoin:round;stroke-linecap:round;pointer-events:none}.pp-part[data-line=true] .pp-ring{stroke-width:4.2px}.pp-part:hover .pp-ring{stroke:#2563eb73}.pp-part:focus-visible .pp-ring{stroke:var(--ep-primary);stroke-width:2.4px;stroke-dasharray:3 2}.pp-part[data-state=last] .pp-ring{stroke:var(--ep-primary)}.pp-part[data-state=wrong] .pp-ring{stroke:var(--ep-error-solid);stroke-dasharray:3 2;fill:#dc26261f;stroke-width:2.2px}.pp-part[data-state=right] .pp-ring{stroke:var(--ep-success-solid);fill:#16a34a29;stroke-width:2.4px}.pp-part[data-state=reveal] .pp-ring{stroke:var(--ep-primary);fill:#2563eb24;stroke-width:2.6px;animation:1.1s ease-in-out infinite pp-pulse}.pp-part[data-line=true][data-state=wrong] .pp-ring,.pp-part[data-line=true][data-state=right] .pp-ring{fill:none}.pp-part[data-line=true][data-state=right] .pp-ring{stroke-width:5px;stroke:#16a34a8c}.pp-part[data-line=true][data-state=wrong] .pp-ring{stroke-width:5px;stroke:#dc262680}.pp-part[aria-disabled=true]{cursor:default}@keyframes pp-pulse{0%,to{stroke-opacity:1}50%{stroke-opacity:.35}}.pp-names{background:var(--ep-surface-soft);border:1px solid var(--ep-border);border-radius:var(--ep-r-md);padding:10px 12px}.pp-names-title{color:var(--ep-ink-3);letter-spacing:.03em;text-align:center;margin:0 0 6px;font-size:13px;font-weight:800}.pp-chips{flex-wrap:wrap;justify-content:center;gap:8px;display:flex}.pp-chip{background:var(--ep-surface);border:2px solid var(--ep-border-strong);color:var(--ep-ink);border-radius:999px;align-items:center;gap:6px;padding:4px 6px 4px 12px;font-size:16px;font-weight:800;display:inline-flex}.pp-chip[data-hit=true]{border-color:var(--ep-success-solid);background:var(--ep-success-tint)}.ld-picture{width:100%;max-width:440px;margin:0 auto;position:relative}.ld-picture .pc-stage{max-width:none}.ld-marker circle{fill:var(--ep-error-solid);stroke:#fff;stroke-width:.9px}.ld-marker text{fill:#fff;font-family:var(--ep-font);pointer-events:none}.ld-marker[data-fb=right] circle{fill:var(--ep-success-solid)}.ld-marker[data-pulse=true] circle{animation:1.1s ease-in-out infinite pp-pulse}.ld-list{gap:8px;width:100%;max-width:440px;margin:0 auto;padding:0;list-style:none;display:grid}.ld-row{display:block}.ld-slot{min-width:0;position:relative}.ld-slot--row{-moz-column-gap:8px;grid-template-columns:30px minmax(0,1fr);align-items:center;column-gap:8px;display:grid}.ld-slot--row .ld-num{align-self:center}.ld-slot--cycle{width:31%;position:absolute;transform:translate(-50%,-50%)}.ld-slot--cycle .ld-num{z-index:2;width:22px;height:22px;font-size:12px;position:absolute;top:-8px;left:-6px}.ld-slot--cycle .sb-empty,.ld-slot--cycle .sb-tile{--sb-font:14px;border-radius:12px;min-height:44px;padding:4px 6px;font-size:14px}.ld-slot--cycle .sb-empty{background:#ffffffeb}.ld-empty{font-size:14px}.ld-slot[data-pulse=true] .sb-empty,.ld-slot[data-pulse=true] .sb-tile{animation:1.1s ease-in-out infinite pp-pulse-box}.ld-overlay{pointer-events:none;position:absolute;inset:0}.ld-overlay>*{pointer-events:auto}.ld-tag{--sb-font:18px;min-height:48px;padding:6px 12px}.ld-bank{width:100%;max-width:440px;margin:0 auto}.ld-bank .sb-pile{gap:10px 8px}@keyframes pp-pulse-box{0%,to{box-shadow:0 0 0 3px var(--ep-primary-ring)}50%{box-shadow:0 0 0 7px #93c5fd40}}@media (max-width:420px){.ld-slot--cycle{width:33%}.ld-slot--cycle .sb-empty,.ld-slot--cycle .sb-tile{--sb-font:13px;font-size:13px}}@media (prefers-reduced-motion:reduce){.pp-part[data-state=reveal] .pp-ring,.ld-marker[data-pulse=true] circle,.ld-slot[data-pulse=true] .sb-empty,.ld-slot[data-pulse=true] .sb-tile{animation:none}}.ld-given{background:var(--ep-surface-soft);border-color:var(--ep-border);box-shadow:none;cursor:default;color:var(--ep-ink-2)}.ld-given:hover{box-shadow:none;border-color:var(--ep-border);transform:none}.ld-slot--row .ld-given{min-height:48px}
:root{--ep-bg:#f5f7fa;--ep-surface:#fff;--ep-surface-soft:#f8fafc;--ep-border:#e2e8f0;--ep-border-strong:#cbd5e1;--ep-ink:#1e293b;--ep-ink-2:#475569;--ep-ink-3:#64748b;--ep-primary:#2563eb;--ep-primary-dark:#1d4ed8;--ep-primary-tint:#eff6ff;--ep-primary-ring:#93c5fd;--ep-success:#15803d;--ep-success-solid:#16a34a;--ep-success-tint:#f0fdf4;--ep-success-border:#86efac;--ep-error:#b91c1c;--ep-error-solid:#dc2626;--ep-error-tint:#fef2f2;--ep-error-border:#fca5a5;--ep-r-sm:10px;--ep-r-md:14px;--ep-r-lg:16px;--ep-r-xl:20px;--ep-s1:4px;--ep-s2:8px;--ep-s3:12px;--ep-s4:16px;--ep-s5:24px;--ep-s6:32px;--ep-shadow-card:0 1px 2px #0f172a0a, 0 4px 16px #0f172a0d;--ep-font:var(--font-nunito), system-ui, -apple-system, "Segoe UI", sans-serif;--ep-fs-prompt:clamp(21px, 4.2vw, 25px);--ep-fs-option:18px;--ep-fs-body:16px;--ep-fs-small:14px;--ep-fs-meta:13px;--ep-opt-min-h:60px;--ep-visual-min-h:160px}.ep-player[data-age=early]{--ep-fs-prompt:clamp(26px, 6vw, 32px);--ep-fs-option:22px;--ep-opt-min-h:72px;--ep-visual-min-h:200px}.ep-page{background:var(--ep-bg);font-family:var(--ep-font)}.ep-strip{background:var(--ep-surface);border:1px solid var(--ep-border);border-radius:var(--ep-r-lg);padding:10px var(--ep-s4);max-width:820px;margin:0 auto var(--ep-s3)}.ep-strip-bar{background:#e5e9f0;border-radius:999px;flex:1;height:8px;overflow:hidden}.ep-strip-fill{background:var(--ep-primary);border-radius:999px;height:8px;transition:width .5s}.ep-strip-meta{font-size:var(--ep-fs-meta);color:var(--ep-ink-2);font-weight:700}.ep-link-btn{min-height:44px;padding:0 var(--ep-s4);border-radius:var(--ep-r-sm);border:1px solid var(--ep-border-strong);background:var(--ep-surface);color:var(--ep-ink);font-weight:700;font-size:var(--ep-fs-small);cursor:pointer}.ep-link-btn:hover{background:var(--ep-surface-soft)}.qcard-stack.ep-player:before,.qcard-stack.ep-player:after{display:none}.qcard-stack.ep-player{max-width:820px;font-family:var(--ep-font);color:var(--ep-ink);margin:0 auto}.ep-card{background:var(--ep-surface);border:1px solid var(--ep-border);border-radius:var(--ep-r-xl);box-shadow:var(--ep-shadow-card);padding:var(--ep-s6);position:relative}.qcard.ep-card:focus-within{box-shadow:var(--ep-shadow-card)!important}@media (max-width:640px){.ep-card{padding:var(--ep-s4);border-radius:var(--ep-r-lg)}}.ep-card-head{justify-content:flex-end;align-items:center;gap:var(--ep-s2);display:flex}.ep-head-actions{justify-content:flex-end;align-items:center;gap:var(--ep-s2);flex-wrap:wrap;display:flex}.ep-head-actions:not(:empty),.ep-card-head>button{margin-bottom:var(--ep-s3)}.ep-chip{border:1px solid var(--ep-primary-ring);background:var(--ep-primary-tint);min-height:44px;color:var(--ep-primary-dark);font-family:var(--ep-font);font-weight:800;font-size:var(--ep-fs-small);cursor:pointer;border-radius:999px;align-items:center;gap:6px;padding:0 14px;display:inline-flex}.ep-chip:hover{background:#dbeafe}.ep-chip[aria-expanded=true]{background:var(--ep-primary);color:#fff;border-color:var(--ep-primary)}.ep-keyidea-panel{background:var(--ep-primary-tint);border-radius:var(--ep-r-md);padding:var(--ep-s4);margin-bottom:var(--ep-s4);color:var(--ep-ink);border:1px solid #bfdbfe}.ep-keyidea-panel h3{font-size:var(--ep-fs-small);color:var(--ep-primary-dark);margin:0 0 6px;font-weight:800}.ep-keyidea-panel p{font-size:var(--ep-fs-body);white-space:pre-line;margin:0;line-height:1.55}.ep-icon-btn{border:1px solid var(--ep-border-strong);background:var(--ep-surface);cursor:pointer;width:44px;height:44px;color:var(--ep-ink-2);border-radius:50%;justify-content:center;align-items:center;display:inline-flex}.ep-icon-btn:hover{background:var(--ep-surface-soft)}.ep-prompt{font-family:var(--ep-font);font-size:var(--ep-fs-prompt);color:var(--ep-ink);letter-spacing:0;max-width:62ch;font-weight:700;line-height:1.35}.ep-stage{min-height:var(--ep-visual-min-h);padding:var(--ep-s4);background:var(--ep-surface-soft);border:1px solid var(--ep-border);border-radius:var(--ep-r-lg);justify-content:center;align-items:center;display:flex;overflow-x:auto}.ep-options{gap:var(--ep-s3);grid-template-columns:1fr;grid-auto-rows:1fr;display:grid}@media (min-width:640px){.ep-options{grid-template-columns:repeat(2,minmax(0,1fr))}}.ep-opt{font-family:var(--ep-font)}.ep-opt:focus-visible,.ep-btn:focus-visible,.ep-chip:focus-visible,.ep-icon-btn:focus-visible,.ep-link-btn:focus-visible,.ep-foot-btn:focus-visible{outline:3px solid var(--ep-primary);outline-offset:2px}.ep-actions{margin-top:var(--ep-s5);justify-content:center;display:flex}.ep-btn{font-family:var(--ep-font);color:#fff;background:var(--ep-primary);border-radius:var(--ep-r-md);min-height:56px;padding:0 var(--ep-s6);cursor:pointer;min-width:260px;box-shadow:0 2px 0 var(--ep-primary-dark), 0 6px 16px #2563eb40;border:0;font-size:19px;font-weight:800;transition:background-color .15s,transform .15s}.ep-btn:hover{background:var(--ep-primary-dark)}.ep-btn:active{transform:translateY(1px)}@media (max-width:640px){.ep-btn{width:100%}}.ep-foot{justify-content:space-between;align-items:center;gap:var(--ep-s3);margin-top:var(--ep-s5);padding-top:var(--ep-s3);border-top:1px solid var(--ep-border);font-size:var(--ep-fs-meta);color:var(--ep-ink-3);display:flex}.ep-foot-btn{min-height:44px;padding:0 var(--ep-s3);border-radius:var(--ep-r-sm);color:var(--ep-ink-2);font-family:var(--ep-font);font-size:var(--ep-fs-meta);cursor:pointer;background:0 0;border:0;align-items:center;gap:6px;font-weight:700;display:inline-flex}.ep-foot-btn:hover{background:var(--ep-surface-soft);color:var(--ep-ink)}.ep-fb{border-radius:var(--ep-r-md);padding:var(--ep-s4);font-family:var(--ep-font);border:1px solid}.ep-fb--ok{background:var(--ep-success-tint);border-color:var(--ep-success-border);color:var(--ep-ink)}.ep-fb--bad{background:var(--ep-surface);border-color:var(--ep-border);border-left:4px solid var(--ep-error-solid);color:var(--ep-ink)}.ep-fb-title{align-items:center;gap:var(--ep-s2);margin:0 0 var(--ep-s2);font-size:18px;font-weight:800;display:flex}.ep-fb--ok .ep-fb-title{color:var(--ep-success)}.ep-fb--bad .ep-fb-title{color:var(--ep-error)}.ep-fb-row{margin-top:var(--ep-s3);font-size:var(--ep-fs-body);white-space:pre-line;line-height:1.55}.ep-fb-label{font-size:var(--ep-fs-meta);color:var(--ep-ink-3);margin-bottom:2px;font-weight:800;display:block}.ep-fb-answer{color:var(--ep-success);font-size:18px;font-weight:800}@media (prefers-reduced-motion:reduce){.ep-btn,.ep-strip-fill{transition:none}}.ep-page{background:linear-gradient(180deg, var(--ep-tint,#e6eefb) 0, var(--ep-bg) 440px)}.ep-page[data-subject=maths]{--ep-tint:#dcebff}.ep-page[data-subject=english]{--ep-tint:#ffe8d4}.ep-page[data-subject=science]{--ep-tint:#d9f3e3}.ep-stats{gap:var(--ep-s3);font-family:var(--ep-font);flex-direction:column}.ep-stat{background:var(--ep-surface);border:1px solid var(--ep-border);border-radius:var(--ep-r-md);text-align:center;box-shadow:var(--ep-shadow-card);overflow:hidden}.ep-stat-h{color:#fff;font-size:var(--ep-fs-meta);letter-spacing:.02em;padding:6px 8px;font-weight:800}.ep-stat--a .ep-stat-h{background:var(--ep-primary)}.ep-stat--b .ep-stat-h{background:#0f9aa8}.ep-stat--c .ep-stat-h{background:#e8702a}.ep-stat-v{color:var(--ep-ink);font-variant-numeric:tabular-nums;padding:10px 8px 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var(--ep-border);border-radius:var(--ep-r-md);background:#fff;flex:none;width:150px;height:150px;padding:8px}.ep-passage-q{font-size:var(--ep-fs-prompt);color:var(--ep-ink);margin:var(--ep-s4) 0 0;font-weight:800;line-height:1.35}@media (max-width:640px){.ep-passage{padding:var(--ep-s4);flex-direction:column-reverse;align-items:stretch}.ep-passage-pic{align-self:center;width:120px;height:120px}}.ep-fb-listen{margin-left:auto;display:inline-flex}