.fc-root{max-width:860px;margin:40px auto;padding:0 16px;box-sizing:border-box;font-family:system-ui,-apple-system,"Segoe UI",Roboto,"Helvetica Neue",Arial,"Noto Sans JP","Hiragino Kaku Gothic ProN",Meiryo,sans-serif;color:#222;line-height:1.6}.fc-root h1{font-size:1.6rem;margin:0 0 16px}.fc-root .fc-mode-selector{margin-bottom:24px;padding:16px 20px;background-color:#e9ecef;border-radius:8px;box-shadow:0 2px 5px rgba(0,0,0,.08);border:0}.fc-root .fc-mode-selector legend{font-weight:700;margin-bottom:8px}.fc-root .fc-mode-selector label{margin-right:20px;font-size:1.05em;cursor:pointer;color:#495057;display:inline-flex;align-items:center;gap:8px}.fc-root .fc-mode-selector input[type="radio"]{transform:scale(1.2)}.fc-root .fc-card-container{display:flex;flex-direction:column;gap:20px;padding:0}.fc-root .fc-card{background-color:#fff;border:none;border-radius:6px;padding:20px;box-shadow:0 1px 3px rgba(0,0,0,.1),0 1px 2px rgba(0,0,0,.05);display:flex;flex-direction:column;min-height:160px;box-sizing:border-box}.fc-root .fc-question{font-size:1.15rem;font-weight:700;margin:0 0 12px;color:#222}.fc-root .fc-answer{font-size:1rem;color:#5f6b76;border-top:1px solid #eee;padding-top:12px;margin-top:12px}.fc-root .fc-toggle-answer-btn{background-color:#0d6efd;color:#fff;border:none;padding:9px 14px;border-radius:6px;cursor:pointer;font-size:1rem;margin-top:8px;align-self:flex-start;transition:background-color .2s ease}.fc-root .fc-toggle-answer-btn:hover{background-color:#0a58ca}.fc-root .fc-toggle-answer-btn:focus{outline:2px solid #0d6efd55;outline-offset:2px}.fc-root .fc-game-mode-study .fc-toggle-answer-btn{display:none}.fc-root .fc-game-mode-quiz .fc-toggle-answer-btn{display:inline-flex}@media (max-width:480px){.fc-root .fc-question{font-size:1.05rem}.fc-root .fc-toggle-answer-btn{font-size:.95rem}}