:root{--bg: #fff4f8;--bg-grad-1: #ffe9f2;--bg-grad-2: #fff6ee;--card: #ffffff;--card-soft: #fff0f6;--border: #ffd6e6;--border-soft: #ffe4ef;--text: #5b4650;--text-dim: #a98a98;--primary: #ff87b2;--primary-strong: #f76d97;--primary-ink: #ffffff;--accent-mint: #8fd9c;--correct: #57c98a;--correct-bg: #e7fbf0;--wrong: #ff8aa0;--wrong-bg: #ffecf0;--warn: #f6a94b;--star: #ffc85c;--radius: 22px;--radius-sm: 14px;--shadow: 0 8px 22px rgba(247, 109, 151, .14);--shadow-sm: 0 3px 10px rgba(247, 109, 151, .12);--safe-top: env(safe-area-inset-top, 0px);--safe-bottom: env(safe-area-inset-bottom, 0px);--tabbar-h: 48px;font-family:Hiragino Maru Gothic ProN,"Rounded Mplus 1c",Quicksand,system-ui,-apple-system,Noto Sans JP,sans-serif;color:var(--text)}*{box-sizing:border-box;-webkit-tap-highlight-color:transparent}html,body,#root{margin:0;height:100%;min-height:100dvh}body{background:linear-gradient(170deg,var(--bg-grad-1),var(--bg-grad-2));background-attachment:fixed;overscroll-behavior-y:none}button{font-family:inherit;cursor:pointer}a{color:var(--primary-strong)}.app{min-height:100dvh;display:flex;flex-direction:column}.screen{flex:1;display:flex;flex-direction:column;padding:calc(var(--safe-top) + 18px) 16px calc(var(--safe-bottom) + var(--tabbar-h) + 18px);max-width:640px;width:100%;margin:0 auto}.title{font-size:22px;font-weight:800;margin:0 0 2px;letter-spacing:.02em;display:flex;align-items:center;gap:8px}.subtitle{color:var(--text-dim);font-size:13px;margin:0 0 18px;font-weight:600}.home-hero{display:flex;flex-direction:column;align-items:center;text-align:center;margin-bottom:6px}.home-hero img{width:150px;height:150px;object-fit:contain;margin-bottom:4px;filter:drop-shadow(0 6px 10px rgba(247,109,151,.2))}.home-screen{padding-bottom:calc(var(--safe-bottom) + var(--tabbar-h) + 92px)}.home-start-button{position:fixed;left:50%;bottom:calc(var(--safe-bottom) + var(--tabbar-h) + 10px);z-index:18;width:calc(100% - 32px);max-width:608px;transform:translate(-50%)}.home-start-button:active{transform:translate(-50%) scale(.98)}.card{background:var(--card);border:2px solid var(--border-soft);border-radius:var(--radius);padding:16px;margin-bottom:14px;box-shadow:var(--shadow-sm)}.label{display:block;font-size:13px;color:var(--primary-strong);margin-bottom:10px;font-weight:800}.chip-row{display:flex;flex-wrap:wrap;gap:8px}.chip{border:2px solid var(--border);background:var(--card-soft);color:var(--text);border-radius:999px;padding:9px 15px;font-size:14px;font-weight:700;transition:transform .08s ease}.chip:active{transform:scale(.95)}.chip.active{background:var(--primary);border-color:var(--primary);color:var(--primary-ink);box-shadow:var(--shadow-sm)}.btn{display:block;width:100%;border:none;border-radius:var(--radius);padding:16px;font-size:16px;font-weight:800;background:var(--card-soft);color:var(--primary-strong);border:2px solid var(--border);transition:transform .08s ease}.btn:active{transform:scale(.98)}.btn.primary{background:linear-gradient(135deg,#ff9dbf,#f76d97);color:var(--primary-ink);border:none;box-shadow:var(--shadow)}.btn:disabled{opacity:.45}.btn.ghost{background:#fff}.btn-row{display:flex;gap:10px}.btn-row>.btn{flex:1}.number-input{width:90px;background:#fff;border:2px solid var(--border);color:var(--text);border-radius:12px;padding:10px;font-size:16px;text-align:center;font-family:inherit}.quiz{min-height:100dvh;display:flex;flex-direction:column}.quiz-top{display:flex;align-items:center;gap:10px;padding:calc(var(--safe-top) + 12px) 14px 12px;border-bottom:2px solid var(--border-soft);background:#ffffffd9;-webkit-backdrop-filter:blur(6px);backdrop-filter:blur(6px);position:sticky;top:0;z-index:5}.icon-btn{border:none;background:transparent;color:var(--text-dim);font-size:24px;line-height:1;padding:4px;border-radius:10px}.icon-btn.active{color:var(--star)}.timer{font-variant-numeric:tabular-nums;font-weight:800;font-size:19px;color:var(--primary-strong);background:var(--card-soft);padding:4px 12px;border-radius:999px}.timer.low{color:#fff;background:var(--wrong)}.progress{font-size:13px;color:var(--text-dim);font-weight:700;margin-left:auto}.quiz-body{flex:1;display:flex;flex-direction:column;min-height:0}.q-region{flex:1 1 auto;overflow-y:auto;padding:18px 16px;-webkit-overflow-scrolling:touch}.q-meta{font-size:12px;color:var(--primary-strong);font-weight:800;margin-bottom:10px;background:var(--card-soft);display:inline-block;padding:4px 12px;border-radius:999px}.q-text{font-size:17px;line-height:1.8;white-space:pre-wrap;font-weight:600}.q-image{display:block;width:100%;margin-top:14px;border:2px solid var(--border-soft);border-radius:16px;background:#fff;box-shadow:var(--shadow-sm)}.a-region{flex:0 0 auto;border-top:3px dashed var(--border);background:var(--card);border-radius:26px 26px 0 0;padding:14px 16px;max-height:64dvh;overflow-y:auto;box-shadow:0 -6px 20px #f76d971a}.quiz-action-footer{position:sticky;bottom:0;background:var(--card);padding:12px 16px calc(var(--safe-bottom) + 12px);box-shadow:0 -4px 14px #f76d971f}.quiz-action-footer .btn.primary{margin:0}.a-region-label{font-size:12px;color:var(--text-dim);font-weight:700;margin-bottom:12px;text-align:center}.choice{display:flex;gap:12px;align-items:center;width:100%;text-align:left;border:2px solid var(--border);background:#fff;color:var(--text);border-radius:16px;padding:14px;margin-bottom:10px;font-size:15px;line-height:1.5;font-weight:600;transition:transform .08s ease}.choice:active{transform:scale(.99)}.choice.selected{border-color:var(--primary);background:var(--card-soft)}.choice.correct{border-color:var(--correct);background:var(--correct-bg)}.choice.wrong{border-color:var(--wrong);background:var(--wrong-bg)}.choice-label{flex:0 0 auto;width:30px;height:30px;border-radius:50%;background:var(--card-soft);color:var(--primary-strong);display:flex;align-items:center;justify-content:center;font-weight:800;font-size:15px}.result-banner{display:flex;align-items:center;justify-content:center;gap:10px;font-weight:800;font-size:17px;padding:12px;border-radius:16px;margin-bottom:12px}.result-banner img{width:42px;height:42px;object-fit:contain}.result-banner.ok{background:var(--correct-bg);color:var(--correct)}.result-banner.ng{background:var(--wrong-bg);color:var(--wrong)}.action-row{display:flex;gap:10px;margin:4px 0 12px}.action-btn{flex:1;border:2px solid var(--border);background:#fff;color:var(--primary-strong);border-radius:14px;padding:11px;font-size:14px;font-weight:800}.action-btn.has{background:var(--card-soft)}.action-btn:disabled{opacity:.4}.explanation{background:var(--card-soft);border:2px solid var(--border-soft);border-radius:14px;padding:14px;font-size:15px;line-height:1.85;margin-bottom:12px;white-space:pre-wrap;font-weight:600}.needs-review{display:inline-block;font-size:11px;color:var(--warn);border:1.5px solid var(--warn);border-radius:8px;padding:1px 7px;margin-left:6px;font-weight:800}.modal-backdrop{position:fixed;top:0;right:0;bottom:0;left:0;background:#5b465066;display:flex;align-items:flex-end;justify-content:center;z-index:50}.modal{background:var(--card);border:2px solid var(--border);border-radius:26px 26px 0 0;padding:20px 16px calc(var(--safe-bottom) + 20px);width:100%;max-width:640px;max-height:88vh;overflow-y:auto;box-shadow:0 -6px 24px #f76d972e}.modal textarea{width:100%;min-height:140px;background:var(--card-soft);color:var(--text);border:2px solid var(--border);border-radius:14px;padding:12px;font-size:15px;font-family:inherit;resize:vertical}.stat-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:10px;margin-bottom:16px}.stat-box{background:var(--card);border:2px solid var(--border-soft);border-radius:18px;padding:14px 8px;text-align:center;box-shadow:var(--shadow-sm)}.stat-box .num{font-size:26px;font-weight:800;color:var(--primary-strong)}.stat-box .cap{font-size:11px;color:var(--text-dim);margin-top:4px;font-weight:700}.bar{height:10px;background:var(--card-soft);border-radius:999px;overflow:hidden}.bar>span{display:block;height:100%;background:linear-gradient(90deg,#8fe0b3,var(--correct))}.q-row{background:var(--card);border:2px solid var(--border-soft);border-radius:18px;padding:13px 15px;margin-bottom:9px;box-shadow:var(--shadow-sm)}.q-row .q-row-head{display:flex;justify-content:space-between;gap:8px;font-size:12px;color:var(--primary-strong);font-weight:800;margin-bottom:6px}.q-row .q-row-text{font-size:14px;line-height:1.5;font-weight:600;overflow:hidden;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical}.tabbar{position:fixed;left:0;right:0;bottom:0;z-index:20;display:flex;border-top:2px solid var(--border-soft);background:#ffffffeb;-webkit-backdrop-filter:blur(6px);backdrop-filter:blur(6px);min-height:calc(var(--safe-bottom) + var(--tabbar-h));padding-bottom:var(--safe-bottom)}.tabbar a{flex:1;text-align:center;padding:6px 0 5px;color:var(--text-dim);text-decoration:none;font-size:10px;font-weight:700;line-height:1.1}.tabbar a .ico{display:flex;justify-content:center;margin-bottom:1px}.tabbar a .ico svg{width:20px;height:20px}.tabbar a.active{color:var(--primary-strong)}.empty{text-align:center;color:var(--text-dim);padding:30px 20px;font-size:14px;line-height:1.8;font-weight:600}.empty img{width:120px;height:120px;object-fit:contain;display:block;margin:0 auto 12px;opacity:.9}.toast{position:fixed;left:50%;bottom:calc(var(--safe-bottom) + 80px);transform:translate(-50%);background:var(--primary-strong);color:#fff;padding:11px 18px;border-radius:999px;font-size:13px;font-weight:700;z-index:100;box-shadow:var(--shadow)}