.sn-interactive{margin:2rem 0;padding:1.4rem;border:2px solid rgba(23,50,77,.14);border-radius:24px;background:linear-gradient(145deg,#fff,#f7fbff);box-shadow:0 12px 30px rgba(23,50,77,.08)}
.sn-interactive h2{margin-top:0}.sn-instructions{color:#49647b}.sn-bank{display:flex;gap:.7rem;flex-wrap:wrap;margin:1rem 0;padding:1rem;border-radius:16px;background:#eef5fb}.sn-drag{cursor:grab;user-select:none;padding:.7rem 1rem;border:2px solid #17324d;border-radius:14px;background:#fff;font-weight:800;box-shadow:0 4px 0 rgba(23,50,77,.14)}.sn-drag:active{cursor:grabbing}.sn-drop-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(180px,1fr));gap:1rem}.sn-drop{min-height:120px;padding:1rem;border:3px dashed #9bb1c5;border-radius:18px;background:#fff}.sn-drop h3{text-align:center;margin:.1rem 0 .8rem}.sn-drop.correct{border-color:#2f8f68;background:#edf9f3}.sn-drop.wrong{animation:snShake .3s}.sn-feedback{min-height:1.6rem;margin-top:1rem;font-weight:800}.sn-feedback.good{color:#227a55}.sn-feedback.try{color:#9a5b00}.sn-actions{display:flex;gap:.7rem;flex-wrap:wrap;margin-top:1rem}.sn-btn{border:0;border-radius:999px;padding:.75rem 1.1rem;background:#17324d;color:#fff;font-weight:800;cursor:pointer}.sn-btn.secondary{background:#e8eef4;color:#17324d}.sn-choice-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(150px,1fr));gap:.8rem}.sn-choice{padding:1rem;border:2px solid #cad6e0;border-radius:16px;background:#fff;cursor:pointer;font-weight:700}.sn-choice.selected{border-color:#d8a51d;background:#fff8d9}.sn-venn{position:relative;min-height:310px;margin:1rem auto;max-width:650px;border:3px solid #17324d;border-radius:22px;background:#fff;overflow:hidden}.sn-circle{position:absolute;top:55px;width:260px;height:220px;border:4px solid #17324d;border-radius:50%;display:flex;align-items:flex-start;justify-content:center;padding-top:18px;font-weight:900}.sn-circle.a{left:75px;background:rgba(68,156,220,.18)}.sn-circle.b{right:75px;background:rgba(245,191,66,.22)}.sn-region-label{position:absolute;font-weight:900}.sn-region-label.left{left:130px;top:155px}.sn-region-label.middle{left:50%;transform:translateX(-50%);top:155px}.sn-region-label.right{right:130px;top:155px}.sn-region-label.out{right:18px;bottom:12px}.sn-highlight .sn-circle{transition:.3s}.sn-highlight.union .sn-circle{background:rgba(245,191,66,.42)}.sn-highlight.intersection:after{content:'';position:absolute;left:245px;top:55px;width:160px;height:220px;border-radius:50%;background:rgba(47,143,104,.45)}.sn-highlight.complement{background:#dfe9f2}.sn-highlight.complement .sn-circle.a{background:#fff}.sn-counter{font-size:2rem;font-weight:900;text-align:center}.sn-member-row{display:flex;gap:1rem;align-items:center;justify-content:center;flex-wrap:wrap}.sn-set-box{padding:1rem 1.4rem;border:3px solid #17324d;border-radius:18px;background:#fff;font-size:1.2rem;font-weight:800}.sn-symbol-result{font-size:1.5rem;font-weight:900;min-width:110px;text-align:center}.sn-mini-table{width:100%;border-collapse:collapse}.sn-mini-table th,.sn-mini-table td{padding:.75rem;border:1px solid #cad6e0;text-align:center}.sn-mini-table th{background:#17324d;color:#fff}@keyframes snShake{25%{transform:translateX(-5px)}75%{transform:translateX(5px)}}
@media(max-width:650px){.sn-venn{min-height:260px}.sn-circle{width:200px;height:180px}.sn-circle.a{left:20px}.sn-circle.b{right:20px}.sn-region-label.left{left:55px;top:135px}.sn-region-label.middle{top:135px}.sn-region-label.right{right:55px;top:135px}.sn-highlight.intersection:after{left:calc(50% - 60px);top:55px;width:120px;height:180px}}