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chest-box-in{0%{opacity:0;transform:scale(.7)translateY(20px)}to{opacity:1;transform:scale(1)translateY(0)}}.chest-overlay__icon{font-size:72px;animation:1.2s ease-in-out infinite chest-shake}@keyframes chest-shake{0%,to{transform:rotate(0)}20%{transform:rotate(-8deg)scale(1.05)}40%{transform:rotate(8deg)scale(1.08)}60%{transform:rotate(-5deg)scale(1.04)}80%{transform:rotate(5deg)scale(1.06)}}.chest-overlay__hint{color:var(--muted);font-size:16px;font-weight:500}.chest-overlay--opened .chest-overlay__box{animation:.5s cubic-bezier(.34,1.56,.64,1) chest-open-burst}@keyframes chest-open-burst{0%{transform:scale(1)}40%{transform:scale(1.18)rotate(-3deg)}70%{transform:scale(.94)rotate(2deg)}to{transform:scale(1)rotate(0)}}.chest-overlay__reward-emoji{font-size:80px;animation:.6s cubic-bezier(.34,1.56,.64,1) chest-reward-pop}@keyframes chest-reward-pop{0%{opacity:0;transform:scale(.3)rotate(-20deg)}to{opacity:1;transform:scale(1)rotate(0)}}.chest-overlay__reward-label{color:var(--text);font-size:20px;font-weight:700;animation:.4s ease-out .2s both chest-label-in}@keyframes chest-label-in{0%{opacity:0;transform:translateY(10px)}to{opacity:1;transform:translateY(0)}}.chest-overlay__collection{color:var(--primary);background:color-mix(in srgb, var(--primary) 10%, transparent);border-radius:var(--radius-sm);padding:8px 14px;font-size:14px;font-weight:600;animation:.4s ease-out .35s both chest-label-in}.verify-buttons{gap:16px;width:100%;margin-top:8px;padding:0 8px;display:flex}.btn--verify{border-radius:var(--radius);cursor:pointer;-webkit-tap-highlight-color:transparent;border:none;flex:1;padding:18px 12px;font-size:20px;font-weight:700;transition:transform .12s,box-shadow .12s}.btn--verify:active{transform:scale(.95)}.btn--verify-yes{color:#fff;background:#4caf50;box-shadow:0 4px 16px #4caf5059}.btn--verify-yes:active{box-shadow:0 2px 8px #4caf5040}.btn--verify-no{color:#fff;background:#ff6b6b;box-shadow:0 4px 16px #ff6b6b59}.btn--verify-no:active{box-shadow:0 2px 8px #ff6b6b40}.memory-countdown{color:var(--primary);text-align:center;font-size:64px;font-weight:900;font-family:var(--font-num);line-height:1;animation:1s ease-in-out infinite memory-countdown-pulse}@keyframes memory-countdown-pulse{0%,to{opacity:1;transform:scale(1)}50%{opacity:.85;transform:scale(1.12)}}.memory-abacus-hidden{background:var(--card);border:2px dashed var(--border);border-radius:var(--radius);flex-direction:column;justify-content:center;align-items:center;gap:8px;width:100%;min-height:140px;animation:.4s ease-out memory-hidden-in;display:flex}@keyframes memory-hidden-in{0%{opacity:0;transform:scale(.92)}to{opacity:1;transform:scale(1)}}.memory-abacus-hidden__icon{font-size:48px}.memory-abacus-hidden__text{color:var(--muted);font-size:18px;font-weight:600}.memory-choices{grid-template-columns:repeat(2,1fr);gap:12px;width:100%;padding:0 8px;display:grid}.btn--memory-choice{font-size:24px;font-weight:800;font-family:var(--font-num);background:var(--card);border:2px solid var(--border);border-radius:var(--radius);color:var(--text);cursor:pointer;-webkit-tap-highlight-color:transparent;padding:20px 12px;transition:transform .1s,background .1s,border-color .1s}.btn--memory-choice:hover{border-color:var(--primary);background:color-mix(in srgb, var(--primary) 6%, var(--card))}.btn--memory-choice:active{background:color-mix(in srgb, var(--primary) 14%, var(--card));transform:scale(.93)}.problem__text--chain{letter-spacing:.02em;font-size:22px}.chain-watch-hint{text-align:center;color:var(--muted);font-size:15px;font-style:italic;animation:1.4s 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