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var(--climb-line);border-radius:50%;background:var(--climb-surface)}.rope-point:disabled{cursor:default}.rope-answered:after{border-color:var(--climb-accent);background:var(--climb-accent)}.rope-correct:after{border-color:#2e9e5b;background:#2e9e5b}.rope-wrong:after{border-color:#c94f2b;background:#c94f2b}.rope-current:before{content:"";position:absolute;z-index:-2;width:26px;height:26px;border:3px solid color-mix(in srgb,var(--climb-accent) 38%,transparent);border-radius:50%;animation:rope-pulse 1.8s ease-out infinite}.rope-current.rope-unanswered:after{border-color:var(--climb-accent);background:var(--climb-surface)}.rope-count{color:var(--climb-soft);font:600 .8rem/1 IBM Plex Mono,monospace;font-variant-numeric:tabular-nums;white-space:nowrap}@keyframes rope-pulse{0%{transform:scale(.9);opacity:1}70%,to{transform:scale(1.35);opacity:0}}.climb-problem-card{padding:clamp(16px,4vw,24px);border:1.5px solid var(--climb-line);border-radius:18px;background:var(--climb-surface);box-shadow:0 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10px}.climb-problem-answer{margin-top:20px}.answer-numeric-input{width:min(100%,260px);min-height:48px;box-sizing:border-box;padding:10px 13px;border:1.5px solid var(--climb-line);border-radius:11px;background:var(--climb-surface);color:var(--climb-ink);font:600 1.08rem/1.4 IBM Plex Mono,monospace}.answer-choice-group{display:grid;gap:9px;margin:0;padding:0;list-style:none}.answer-choice{display:flex;align-items:center;gap:10px;min-height:48px;box-sizing:border-box;padding:9px 12px;border:1.5px solid var(--climb-line);border-radius:11px;background:var(--climb-surface);color:var(--climb-ink);cursor:pointer;font:500 .96rem/1.5 var(--font-family-body, sans-serif);text-align:left}.answer-choice:hover:not(.answer-choice--readonly){border-color:color-mix(in srgb,var(--climb-accent) 62%,var(--climb-line))}.answer-choice.is-selected{border-color:var(--climb-accent);box-shadow:inset 0 0 0 1px var(--climb-accent)}.answer-choice.is-selected 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