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var(--border-color);background:var(--bg-primary);color:var(--text-secondary);transition:all .15s}.fc-toggle:hover{border-color:var(--text-tertiary)}.fc-toggle.on{background:var(--accent);border-color:var(--accent);color:#fff}.fc-card{perspective:1400px;min-height:320px;cursor:pointer;outline:none}.fc-card:focus-visible .fc-card-inner{box-shadow:0 0 0 3px var(--accent);border-radius:var(--radius-lg)}.fc-card-inner{position:relative;width:100%;min-height:320px;transform-style:preserve-3d;transition:transform .5s cubic-bezier(.4,.2,.2,1)}.fc-card.is-flipped .fc-card-inner{transform:rotateY(180deg)}.fc-face{position:absolute;inset:0;backface-visibility:hidden;-webkit-backface-visibility:hidden;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:12px;padding:32px 24px;overflow-y:auto;border:1px solid var(--border-color);border-radius:var(--radius-lg);background:var(--bg-primary);box-shadow:var(--shadow-md);text-align:center}.fc-back{transform:rotateY(180deg);background:var(--bg-secondary)}.fc-term{font-family:var(--jp-font);font-size:2.5rem;font-weight:700;line-height:1.3;letter-spacing:-.5px;word-break:break-word}.fc-reading{font-family:var(--jp-font);font-size:1.125rem;color:var(--text-secondary)}.fc-meaning{font-size:1.5rem;font-weight:600;line-height:1.35}.fc-image{max-height:120px;width:auto;border-radius:var(--radius-md)}.fc-audio{background:var(--bg-tertiary);border:none;border-radius:50%;width:40px;height:40px;font-size:1.125rem}.fc-hint{position:absolute;bottom:16px;font-size:.75rem;color:var(--text-tertiary)}.fc-example{border-top:1px solid var(--border-color);padding-top:12px;margin-top:4px;max-width:44ch}.fc-example-jp{font-family:var(--jp-font);font-size:1rem}.fc-example-id{font-size:.875rem;color:var(--text-secondary);margin-top:4px}.fc-note{font-size:.8125rem;color:var(--text-tertiary);font-style:italic;max-width:44ch}.fc-grades{display:grid;grid-template-columns:repeat(3,1fr);gap:10px}.fc-grades.is-hidden{opacity:.35;pointer-events:none}.fc-grade{position:relative;display:flex;flex-direction:column;align-items:center;gap:2px;padding:14px 8px;border-radius:var(--radius-md);border:1px solid var(--border-color);background:var(--bg-primary);transition:transform .1s,border-color .15s,background .15s}.fc-grade:hover:not(:disabled){transform:translateY(-1px);background:var(--bg-secondary)}.fc-grade-label{font-weight:700;font-size:.9375rem}.fc-grade-hint{font-size:.7rem;color:var(--text-tertiary)}.fc-grade-key{position:absolute;top:6px;right:8px;font-size:.625rem;color:var(--text-tertiary);border:1px solid var(--border-color);border-radius:3px;padding:0 4px}.fc-grade.again{border-color:var(--lms-again)}.fc-grade.again .fc-grade-label{color:var(--lms-again)}.fc-grade.hard{border-color:var(--lms-hard)}.fc-grade.hard .fc-grade-label{color:var(--lms-hard)}.fc-grade.good{border-color:var(--lms-good)}.fc-grade.good .fc-grade-label{color:var(--lms-good)}.fc-footer{display:flex;justify-content:space-between;align-items:center;font-size:.8125rem;color:var(--text-secondary)}.fc-footer a:hover{color:var(--accent)}.fc-link{background:none;border:none;color:var(--text-secondary);font-size:.8125rem;text-decoration:underline}.fc-guest-note{font-size:.8125rem;color:var(--text-tertiary);text-align:center}.fc-guest-note a{color:var(--accent);font-weight:600}.fc-save-error{font-size:.8125rem;color:var(--danger);text-align:center}.fc-done,.fc-empty{text-align:center;padding:48px 24px;border:1px solid var(--border-color);border-radius:var(--radius-lg);background:var(--bg-secondary)}.fc-done-emoji{font-size:3rem}.fc-done h2{font-size:1.5rem;margin:12px 0 8px}.fc-done-sub{color:var(--text-secondary);max-width:48ch;margin:0 auto}.fc-done-stats{display:flex;justify-content:center;gap:32px;margin:28px 0}.fc-done-stats strong{display:block;font-size:1.75rem}.fc-done-stats span{font-size:.75rem;color:var(--text-tertiary)}.fc-done-actions{display:flex;gap:12px;justify-content:center;flex-wrap:wrap;margin-top:20px}.lms-auth{display:flex;justify-content:center;padding:48px 0}.lms-auth-card{width:100%;max-width:420px;text-align:center;padding:40px 32px;border:1px solid var(--border-color);border-radius:var(--radius-lg);background:var(--bg-primary);box-shadow:var(--shadow-md)}.lms-auth-emoji{font-size:2.5rem}.lms-auth-card h1{font-size:1.5rem;margin:12px 0 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