.mr300-arena{padding:0;overflow:hidden}.mr300-shell{display:grid;grid-template-columns:minmax(0,1fr) 250px}.mr300-main{padding:18px}.mr300-side{padding:18px;border-left:1px solid var(--line);background:var(--soft)}.mr300-modebar,.mr300-controls,.mr300-actions,.mr300-pair-actions{display:flex;flex-wrap:wrap;gap:8px;align-items:center}.mr300-modebar{padding:12px 18px;border-bottom:1px solid var(--line);background:var(--card)}.mr300-tab{appearance:none;border:1px solid var(--line);background:var(--card);color:var(--text);border-radius:999px;padding:9px 13px;font-weight:800;cursor:pointer}.mr300-tab.active{background:var(--text);color:var(--card);border-color:var(--text)}.mr300-controls{margin-bottom:12px}.mr300-controls label{display:grid;gap:4px;font-size:.76rem;color:var(--muted);font-weight:750}.mr300-controls select{min-width:112px;border:1px solid var(--line);border-radius:10px;padding:9px 30px 9px 10px;background:var(--card);color:var(--text);font:inherit}.mr300-start{margin-left:auto}.mr300-stagehead{display:flex;justify-content:space-between;align-items:flex-end;gap:12px;margin:8px 0 10px}.mr300-kicker{font-size:.74rem;text-transform:uppercase;letter-spacing:.08em;color:var(--muted);font-weight:850}.mr300-stagehead h2{font-size:1.15rem;margin:2px 0 0}.mr300-clock{font-variant-numeric:tabular-nums;font-size:1.1rem;font-weight:900}.mr300-progress{height:7px;background:var(--soft);border-radius:999px;overflow:hidden;margin-bottom:12px}.mr300-progress>span{display:block;height:100%;width:0;background:currentColor;transition:width .18s ease}.mr300-board{display:grid;grid-template-columns:minmax(220px,.82fr) minmax(0,1.55fr);gap:14px;align-items:stretch}.mr300-target,.mr300-option,.mr300-candidate{border:1px solid var(--line);border-radius:18px;background:var(--card)}.mr300-target,.mr300-candidate{padding:12px;text-align:center;display:grid;align-content:center;min-height:245px}.mr300-target small,.mr300-candidate small{display:block;color:var(--muted);font-weight:800;margin-bottom:6px}.mr300-options{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:10px}.mr300-option{position:relative;padding:8px;min-height:150px;cursor:pointer;display:grid;place-items:center;touch-action:manipulation}.mr300-option>strong{position:absolute;top:8px;left:8px;border:1px solid var(--line);background:var(--card);border-radius:999px;padding:4px 7px;font-size:.74rem}.mr300-option.selected{outline:2px solid var(--text);outline-offset:1px}.mr300-option.correct{outline:3px solid var(--text);outline-offset:1px}.mr300-option.wrong{border-style:dashed}.mr300-option:focus-visible,.mr300-tab:focus-visible{outline:3px solid var(--text);outline-offset:2px}.mr300-shape{width:100%;height:auto;display:block;max-height:230px;overflow:visible;color:var(--text)}.mr300-pair{display:grid;grid-template-columns:1fr 1fr;gap:12px}.mr300-pair-actions{justify-content:center;margin-top:12px}.mr300-pair-actions .btn{min-width:130px}.mr300-feedback{min-height:52px;margin-top:12px;padding:11px 13px;border-radius:13px;background:var(--soft);line-height:1.45}.mr300-feedback.good{border-left:4px solid currentColor}.mr300-feedback.bad{border-left:4px dashed currentColor}.mr300-actions{margin-top:10px}.mr300-assist{display:none;margin-top:10px;padding:12px;border:1px solid var(--line);border-radius:14px;background:var(--soft)}.mr300-assist.open{display:block}.mr300-assist-controls{display:flex;justify-content:center;gap:7px;flex-wrap:wrap}.mr300-assist-view{max-width:340px;margin:8px auto;cursor:grab;touch-action:none;user-select:none}.mr300-stats{display:grid;grid-template-columns:1fr 1fr;gap:8px}.mr300-stat{padding:10px;border:1px solid var(--line);border-radius:12px;background:var(--card)}.mr300-stat small{display:block;color:var(--muted);font-size:.72rem}.mr300-stat strong{font-size:1.05rem;font-variant-numeric:tabular-nums}.mr300-best{margin-top:10px;padding:10px;border-radius:12px;background:var(--card);border:1px solid var(--line)}.mr300-best strong{display:block}.mr300-best small{color:var(--muted)}.mr300-summary{display:none;margin-top:12px;border:1px solid var(--line);border-radius:14px;padding:14px;background:var(--card)}.mr300-summary.open{display:block}.mr300-summary h3{margin:0 0 6px}.mr300-summary p{margin:5px 0}.mr300-mini{font-size:.82rem;color:var(--muted);line-height:1.45}.mr300-advanced{margin-top:18px;border:1px solid var(--line);border-radius:16px;background:var(--card)}.mr300-advanced>summary{cursor:pointer;padding:14px 16px;font-weight:850;list-style:none}.mr300-advanced>summary::-webkit-details-marker{display:none}.mr300-advanced>summary:after{content:'+';float:right}.mr300-advanced[open]>summary:after{content:'–'}.mr300-advanced-body{padding:0 14px 14px}.mr300-advanced-body>.panel:first-child{margin-top:0}.mr300-explain{margin:14px 0 0;display:grid;grid-template-columns:repeat(3,1fr);gap:10px}.mr300-explain>div{border:1px solid var(--line);border-radius:12px;padding:11px;background:var(--card)}.mr300-explain strong{display:block;margin-bottom:3px}.mr300-explain small{color:var(--muted);line-height:1.4}.mr300-live-dot{display:inline-block;width:7px;height:7px;border-radius:50%;background:currentColor;margin-right:5px}.mr300-hidden{display:none!important}
@media(max-width:820px){.mr300-shell{grid-template-columns:1fr}.mr300-side{border-left:0;border-top:1px solid var(--line)}.mr300-board{grid-template-columns:1fr}.mr300-target{min-height:190px;max-width:430px;width:100%;margin:auto}.mr300-option{min-height:135px}.mr300-main{padding:14px}.mr300-modebar{padding:10px 14px;overflow:auto;flex-wrap:nowrap}.mr300-tab{white-space:nowrap}.mr300-start{margin-left:0}.mr300-pair{grid-template-columns:1fr 1fr}.mr300-target,.mr300-candidate{min-height:190px}.mr300-explain{grid-template-columns:1fr}}
@media(max-width:480px){.mr300-options{gap:7px}.mr300-option{min-height:118px;padding:5px}.mr300-target,.mr300-candidate{min-height:165px;padding:8px}.mr300-pair{gap:7px}.mr300-pair-actions .btn{min-width:0;flex:1}.mr300-shape{max-height:175px}.mr300-controls label{flex:1;min-width:100px}.mr300-controls select{width:100%;min-width:0}}

@media(max-width:480px){
.mr-page>.gameheader{padding-top:14px;padding-bottom:12px}.mr-page>.gameheader h1{font-size:2.15rem;line-height:1.03;margin:.28rem 0 .45rem}.mr-page>.gameheader h1 small{font-size:.66em}.mr-page>.gameheader p{font-size:.94rem;line-height:1.42;margin-bottom:0}.mr300-modebar{overflow:visible;gap:6px}.mr300-tab{flex:1;min-width:0;padding:8px 6px;font-size:.78rem}.mr300-stagehead{margin-top:5px}.mr300-stagehead h2{font-size:1.05rem}.mr300-question-title{font-size:.8rem}.mr300-main{padding-top:12px}.mr300-modebar{padding:9px 10px}.mr300-controls{margin-bottom:7px}.mr300-mini#mr300ModeHelp{margin:3px 0 8px}}