.v3-play:has(#brain-teasers-app){grid-template-columns:minmax(0,1fr) 245px}#brain-teasers-app{overflow-wrap:anywhere;min-width:0}#brain-teasers-app [hidden]{display:none!important}.bt-modes{background:var(--soft);border:1px solid var(--line);border-radius:16px;grid-template-columns:repeat(3,minmax(0,1fr));gap:6px;margin-bottom:22px;padding:5px;display:grid}.bt-modes button{min-height:48px;color:var(--ink);font:inherit;cursor:pointer;background:0 0;border:0;border-radius:12px;padding:8px;font-weight:700}.bt-modes button[aria-pressed=true]{background:var(--yellow);color:#34302a;box-shadow:0 2px 8px #0000000d}.bt-options{margin-bottom:14px}.bt-options label,.bt-daily-settings label{flex:1;min-width:0}.bt-options select,.bt-daily-settings select{width:100%;min-height:46px}.bt-daily-settings{flex-wrap:wrap;align-items:end;gap:14px;display:flex}.bt-daily-settings label{gap:7px;font-size:14px;display:grid}.bt-daily-settings p{flex-basis:100%}.bt-mode-note{color:var(--muted);font-size:14px;line-height:1.8}.bt-progress{flex-wrap:wrap;gap:8px 18px;margin-top:20px;font-size:14px;display:flex}.bt-progress strong{color:var(--purple)}#brain-teasers-app progress{width:100%;height:8px;accent-color:var(--purple);border:0;border-radius:8px;margin:12px 0 22px;display:block;overflow:hidden}.bt-card{background:var(--surface);border:1px solid var(--line);border-radius:22px;padding:clamp(16px,3vw,30px);box-shadow:0 8px 24px #39304b08}.bt-card-top{color:var(--muted);flex-wrap:wrap;align-items:center;gap:8px;font-size:12px;display:flex}.bt-card-top>span:first-child{background:var(--soft);color:var(--ink);border-radius:8px;padding:4px 9px}.bt-card-top>span:last-child{margin-left:auto;font-family:ui-monospace,monospace}.bt-card-heading{color:var(--muted);align-items:center;gap:10px;margin-top:22px;font-size:13px;display:flex}.bt-card h2{letter-spacing:.01em;margin:15px 0 24px;font-size:clamp(20px,3.2vw,26px);line-height:1.85}.bt-choices{grid-template-columns:repeat(2,minmax(0,1fr));gap:12px;display:grid}.bt-choice{text-align:left;background:var(--bg);border:2px solid var(--line);min-height:64px;color:var(--ink);font:inherit;cursor:pointer;border-radius:13px;align-items:center;gap:10px;padding:13px;display:flex}.bt-choice:hover:not(:disabled){border-color:var(--purple);background:var(--soft)}.bt-choice>span:first-child{background:var(--surface);border-radius:50%;flex:0 0 25px;place-items:center;height:25px;font-size:12px;display:grid}.bt-choice.wrong{border-color:#b34b52}.bt-choice.wrong>span:nth-child(2){text-decoration:line-through}.bt-choice.correct{color:#1f5432;background:#ebf6ed;border-color:#34744c}.bt-choice small{font-size:12px;display:block}.bt-choice:disabled{cursor:default;opacity:1}.bt-hints{color:var(--muted);margin:16px 0;padding-left:24px;font-size:14px;line-height:1.9}.bt-hints:empty{display:none}.bt-actions{margin-top:20px}.bt-actions button,.bt-next{min-height:46px}.bt-actions [aria-pressed=true]{border-color:var(--purple);background:var(--soft)}.bt-answer{background:var(--soft);border:1px solid var(--line);border-radius:16px;margin-top:24px;padding:20px;animation:.2s ease-out bt-reveal}.bt-answer h3{margin:10px 0;font-size:22px;line-height:1.7}.bt-answer p{font-size:15px;line-height:1.9}.bt-key{border-top:1px solid var(--line);padding-top:14px}.bt-next{width:100%;margin-top:20px}.bt-feedback{min-height:24px;color:var(--muted);font-size:14px;line-height:1.8}.bt-empty,.bt-result{background:var(--soft);border:1px solid var(--line);border-radius:20px;padding:24px;line-height:1.9}.bt-empty h2,.bt-result h2{font-size:24px}.bt-empty button{min-height:46px}.bt-review{padding-left:23px}.bt-review li{border-bottom:1px solid var(--line);padding:10px 0}.bt-review summary{cursor:pointer;min-height:44px;line-height:1.8}.bt-review p{font-size:14px;line-height:1.9}.bt-review h4{font-size:16px;line-height:1.8}.bt-records{border:1px solid var(--line);border-radius:16px;margin-top:24px;padding:17px;font-size:14px;line-height:1.9}.bt-records>summary{cursor:pointer;min-height:32px;font-weight:700}.bt-records li{margin:8px 0}.bt-records button{text-align:left;min-height:44px}.bt-shortcuts{margin-top:18px}.bt-featured{margin:40px 0}.bt-featured>p{color:var(--muted);line-height:1.9}.bt-featured-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:16px;display:grid}.bt-featured details{border:1px solid var(--line);background:var(--surface);border-radius:16px;min-width:0;padding:18px}.bt-featured summary{cursor:pointer;min-height:44px;font-weight:600;line-height:1.9}.bt-featured details p{font-size:14px;line-height:1.9}.bt-featured small{color:var(--muted);margin-bottom:8px;display:block}#brain-teasers-app :focus-visible,.bt-featured :focus-visible{outline:3px solid var(--purple);outline-offset:3px}[data-theme=dark] .bt-choice.correct{color:#d2eed8;background:#213a2d;border-color:#8dc79c}[data-theme=dark] .bt-choice.wrong{border-color:#ee929b}@keyframes bt-reveal{0%{opacity:.5;transform:translateY(5px)}to{opacity:1;transform:translateY(0)}}@media (prefers-reduced-motion:reduce){.bt-answer{animation:none}}@media (width<=900px){.v3-play:has(#brain-teasers-app){grid-template-columns:minmax(0,1fr)}}@media (width<=580px){.bt-choices,.bt-featured-grid{grid-template-columns:minmax(0,1fr)}.bt-options{flex-wrap:wrap;gap:12px;display:flex}.bt-options label{flex-basis:42%}.bt-options button{flex-basis:100%}.bt-modes button{font-size:14px}.bt-card-top>span:last-child{margin-left:0}.bt-card{border-radius:17px}.bt-answer{padding:16px}.bt-actions{gap:8px}.bt-actions button{flex:40%;padding:10px}.bt-daily-settings label{flex-basis:100%}}