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auto}.fc-topbar{display:flex;align-items:center;gap:14px;margin-bottom:12px}.fc-topmeta{flex:1;display:flex;flex-direction:column;gap:2px;min-width:0}.fc-topmeta strong{font-size:15px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.fc-counter{font-weight:700;color:var(--accent);font-family:var(--mono);font-size:15px}.fc-progress{height:8px;margin-bottom:24px}.fc-stage{perspective:1500px;margin-bottom:18px}.fc-card{position:relative;display:block;width:100%;height:clamp(360px,54vh,460px);padding:0;border:none;background:transparent;cursor:pointer;transform-style:preserve-3d;transition:transform .55s cubic-bezier(.35,.15,.2,1)}.fc-card.is-flipped{transform:rotateY(180deg)}.fc-card:focus{outline:none}.fc-card:focus-visible .fc-front{box-shadow:0 0 0 3px #0c6b5d4d,var(--shadow-2)}.fc-card.is-again .fc-front{border-color:var(--amber);box-shadow:0 0 0 3px var(--amber-soft),var(--shadow-2)}.fc-face{position:absolute;top:0;right:0;bottom:0;left:0;backface-visibility:hidden;-webkit-backface-visibility:hidden;background:radial-gradient(360px 180px at 100% 0%,rgba(12,107,93,.06),transparent 65%),var(--surface);border:1px solid var(--line);border-radius:var(--radius-lg);box-shadow:var(--shadow-2);padding:30px 36px;display:flex;flex-direction:column;overflow:hidden}.fc-front{align-items:center;justify-content:center;text-align:center;gap:18px}.fc-back{transform:rotateY(180deg);justify-content:flex-start;align-items:stretch;gap:14px;overflow-y:auto}.fc-badges{position:absolute;top:20px;left:24px;display:flex;gap:7px}.fc-front-text{font-size:25px;font-weight:700;line-height:1.5;max-width:92%;color:var(--ink)}.fc-card.kind-qa .fc-front-text{font-size:20px;font-weight:600;line-height:1.65;max-width:94%}.fc-flip-hint{position:absolute;bottom:18px;left:0;right:0;text-align:center;font-size:12.5px;color:var(--ink-faint);display:inline-flex;align-items:center;justify-content:center;gap:6px;pointer-events:none}.fc-idea{font-family:var(--mono);font-size:27px;font-weight:700;color:var(--accent);letter-spacing:3px;text-align:center;padding:6px 0 2px;line-height:1.5}.fc-back-list{margin:0;padding-left:22px;text-align:left}.fc-back-list li{margin:9px 0;line-height:1.75;font-size:14.5px}.fc-back-list li::marker{color:var(--accent)}.fc-actions{display:flex;gap:14px;justify-content:center}.fc-actions.is-locked{opacity:.5}.fc-actions .btn{flex:1;max-width:230px;padding:11px 16px;font-size:14.5px}.fc-btn-no{border-color:#d98b76;color:var(--red)}.fc-btn-no:hover:not(:disabled){background:var(--red-soft);border-color:var(--red);color:var(--red)}.fc-keys{text-align:center;font-size:12.5px;margin:13px 0 0}.fc-keys kbd{margin:0 1px}.fc-done{text-align:center;max-width:720px;margin:0 auto;padding-top:24px}.fc-done-mark{width:60px;height:60px;border-radius:50%;background:var(--accent-soft);color:var(--accent);display:grid;place-items:center;margin:0 auto 14px}.fc-done .sub{margin-bottom:0}.fc-weak-list{list-style:none;padding:0;margin:10px 0 0;text-align:left}.fc-weak-list li{padding:8px 0;border-bottom:1px dashed var(--line);font-size:13.5px;line-height:1.65}.fc-weak-list li:last-child{border-bottom:none}.fc-range-item{display:flex;gap:10px;align-items:flex-start;padding:12px 14px;border:1px solid var(--line);border-radius:var(--radius-sm);margin-bottom:10px;cursor:pointer;transition:background .15s,border-color .15s}.fc-range-item:hover{background:var(--surface-2)}.fc-range-item input{margin-top:3px}.fc-range-ch .sel{width:100%}.fc-pool-info{margin:14px 0 4px}@media (max-width: 720px){.fc-face{padding:24px 20px}.fc-card{height:clamp(380px,62vh,460px)}.fc-front-text{font-size:20px;max-width:96%}.fc-card.kind-qa .fc-front-text{font-size:17px}.fc-idea{font-size:22px;letter-spacing:2px}.fc-back-list li{font-size:13.5px}.fc-actions{gap:10px}.fc-actions .btn{padding:10px 8px;font-size:13.5px}.fc-actions kbd{display:none}.fc-keys{font-size:12px}.fc-badges{top:14px;left:16px}}