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100%),radial-gradient(ellipse 50% 40% at 75% 80%,rgba(99,102,241,.03) 0%,transparent 100%);box-shadow:0 0 0 1px #0f172a0a,0 2px 4px #0f172a0a,0 10px 28px #0f172a14,0 32px 64px #0f172a12,inset 0 1px #ffffffd9;justify-content:center;align-items:center;position:relative}.fc-front-inner{display:flex;flex-direction:column;align-items:center;gap:14px;padding:44px 36px 40px;text-align:center;flex:1}.fc-chips{display:flex;gap:6px;flex-wrap:wrap;justify-content:center}.fc-term{font-size:clamp(1.8rem,5vw,2.6rem);font-weight:800;color:var(--text);letter-spacing:-.025em;line-height:1.1}.fc-forms{font-size:.9rem;color:var(--text-2);font-weight:500;font-style:italic;letter-spacing:.01em}.fc-tap-hint{display:flex;align-items:center;gap:7px;font-size:.78rem;font-weight:500;color:var(--text-3);margin-top:4px;letter-spacing:.02em}.fc-tap-icon{animation:fc-pulse 2.4s ease-in-out infinite;line-height:1}@keyframes fc-pulse{0%,to{opacity:.4;transform:scale(.95)}50%{opacity:1;transform:scale(1.15)}}.fc-word-link{position:absolute;top:12px;right:14px;font-size:.72rem;font-weight:700;color:var(--text-3);padding:4px 6px;border-radius:6px;transition:color .12s,background .12s;text-decoration:none}.fc-word-link:hover{color:var(--accent);background:var(--accent-light)}.fc-face--back{background:var(--surface);background-image:radial-gradient(ellipse 60% 50% at 80% 20%,rgba(99,102,241,.06) 0%,transparent 100%);box-shadow:0 0 0 1px #0f172a0a,0 2px 4px #0f172a0a,0 10px 28px #0f172a14,0 32px 64px #0f172a12,inset 0 1px #ffffffd9;transform:rotateY(180deg);justify-content:space-between}.fc-back-inner{flex:1;display:flex;flex-direction:column;gap:12px;padding:28px 28px 16px;overflow-y:auto;min-height:0}.fc-back-term-row{display:flex;align-items:center;gap:8px}.fc-back-term{font-size:.92rem;font-weight:700;color:var(--text-3);letter-spacing:-.01em}.fc-current-level{display:inline-flex;align-items:center;font-size:.65rem;font-weight:700;padding:2px 7px;border-radius:999px;border:1px solid transparent;text-transform:uppercase;letter-spacing:.04em}.fc-translation{font-size:clamp(1.3rem,4vw,1.9rem);font-weight:800;color:var(--text);letter-spacing:-.02em;line-height:1.25}.fc-detail{display:flex;flex-direction:column;gap:3px}.fc-detail-label{font-size:.62rem;font-weight:700;text-transform:uppercase;letter-spacing:.08em;color:var(--text-3)}.fc-detail-text{font-size:.88rem;color:var(--text-2);line-height:1.45}.fc-level-row{display:grid;grid-template-columns:repeat(4,1fr);gap:6px;padding:10px 14px 14px;border-top:1px solid var(--border);flex-shrink:0}.fc-level-btn{display:flex;flex-direction:column;align-items:center;justify-content:center;gap:3px;padding:10px 4px;border-radius:12px;border:1px solid transparent;cursor:pointer;font-family:inherit;transition:transform .12s,box-shadow .12s,filter .12s}.fc-level-btn.level-1{background:#fef2f2;color:#dc2626;border-color:#fca5a5}.fc-level-btn.level-2{background:#eff6ff;color:#2563eb;border-color:#93c5fd}.fc-level-btn.level-3{background:#faf5ff;color:#7c3aed;border-color:#c4b5fd}.fc-level-btn.level-4{background:#ecfdf5;color:#059669;border-color:#6ee7b7}.fc-level-btn:hover:not(:disabled){transform:translateY(-2px);box-shadow:0 4px 12px #0000001f;filter:brightness(.97)}.fc-level-btn:active:not(:disabled){transform:translateY(0);box-shadow:none}.fc-level-btn:disabled{opacity:.45;cursor:not-allowed}.fc-level-btn--current{box-shadow:inset 0 0 0 2px currentColor}.fc-level-num{font-size:1.15rem;font-weight:900;line-height:1}.fc-level-name{font-size:.6rem;font-weight:700;text-transform:uppercase;letter-spacing:.05em;line-height:1}.fc-swipe-badge{position:absolute;top:50%;transform:translateY(-50%);padding:8px 14px;border-radius:12px;font-size:.85rem;font-weight:800;pointer-events:none;z-index:20;letter-spacing:.02em;animation:fc-badge-pop .12s cubic-bezier(.34,1.5,.64,1)}@keyframes fc-badge-pop{0%{opacity:0;scale:.75}to{opacity:1;scale:1}}.fc-swipe-badge--right{right:12px;background:#ecfdf5;color:#059669;border:2px solid #6ee7b7}.fc-swipe-badge--left{left:12px;background:#fef2f2;color:#dc2626;border:2px solid #fca5a5}.fc-nav{display:flex;align-items:center;gap:10px}.fc-nav-btn{padding:8px 16px;border:1px solid var(--border);border-radius:var(--radius-sm);background:var(--surface);color:var(--text-2);font-size:.82rem;font-weight:600;cursor:pointer;font-family:inherit;transition:border-color .12s,color .12s,background .12s;white-space:nowrap}.fc-nav-btn:hover:not(:disabled){border-color:var(--accent);color:var(--accent);background:var(--accent-light)}.fc-nav-btn:disabled{opacity:.32;cursor:not-allowed}.fc-reveal-btn{padding:11px 36px;background:var(--accent);color:#fff;border:none;border-radius:var(--radius-sm);font-size:.9rem;font-weight:700;cursor:pointer;font-family:inherit;transition:background .12s,transform .1s,box-shadow .12s;box-shadow:0 4px 14px #6366f159;letter-spacing:.01em}.fc-reveal-btn:hover{background:var(--accent-dark);transform:translateY(-1px);box-shadow:0 6px 20px #6366f166}.fc-reveal-btn:active{transform:translateY(0)}.fc-skip-btn{padding:11px 20px}.fc-keyboard-hint{font-size:.72rem;color:var(--text-3);text-align:center;opacity:.7}.fc-done{display:flex;flex-direction:column;align-items:center;gap:10px;padding:60px 20px 40px;text-align:center;animation:fc-enter .4s cubic-bezier(.34,1.4,.64,1)}.fc-done-icon{font-size:3rem}.fc-done-title{font-size:1.4rem;font-weight:800;color:var(--text);letter-spacing:-.01em}.fc-done-sub{font-size:.9rem;color:var(--text-2)}.fc-mode-toggle{display:flex;align-items:center;gap:2px;background:var(--surface-2);border:1px solid var(--border);border-radius:10px;padding:3px;flex-shrink:0}.fc-mode-btn{display:flex;align-items:center;gap:5px;padding:5px 11px;border:none;background:transparent;border-radius:7px;font-size:.78rem;font-weight:600;color:var(--text-2);cursor:pointer;font-family:inherit;transition:background .12s,color .12s,box-shadow .12s;white-space:nowrap}.fc-mode-btn.fc-mode-btn--active{background:var(--surface);color:var(--text);box-shadow:0 1px 4px #0f172a14}@media(max-width:560px){.fc-deck{padding:4px 12px 28px;gap:16px}.fc-front-inner{padding:36px 24px 32px}.fc-back-inner{padding:22px 20px 12px}.fc-level-row{padding:8px 10px 12px;gap:5px}.fc-level-btn{padding:8px 2px;border-radius:10px}.fc-level-num{font-size:1rem}.fc-level-name{font-size:.55rem}.fc-keyboard-hint{display:none}.fc-reveal-btn{padding:11px 28px}}@media(max-width:380px){.fc-level-row{grid-template-columns:repeat(2,1fr)}}