: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) + 132px)}.home-footer{position:fixed;left:0;right:0;bottom:calc(var(--safe-bottom) + var(--tabbar-h));z-index:18;display:flex;padding:18px 16px 22px;background:#fffffff5;border-top:2px solid var(--border-soft);border-radius:22px 22px 0 0;box-shadow:0 -6px 20px #f76d9724;-webkit-backdrop-filter:blur(6px);backdrop-filter:blur(6px)}.home-footer>.home-start-button{width:100%;max-width:608px;margin:0 auto;padding:18px;font-size:17px}.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{height:100dvh;max-height:100dvh;overflow:hidden;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,.a-region{scrollbar-width:thin;scrollbar-color:var(--border) transparent}.q-region::-webkit-scrollbar,.a-region::-webkit-scrollbar{width:6px}.q-region::-webkit-scrollbar-track,.a-region::-webkit-scrollbar-track{background:transparent}.q-region::-webkit-scrollbar-thumb,.a-region::-webkit-scrollbar-thumb{border-radius:999px;background:var(--border)}.q-region::-webkit-scrollbar-thumb:active,.a-region::-webkit-scrollbar-thumb:active{background:var(--primary)}.q-region{flex:1 1 auto;min-height:76px;overflow-y:auto;overscroll-behavior:contain;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-figure{display:block;width:100%;margin:10px 0 14px;border:2px solid var(--border-soft);border-radius:12px;background:#fff}.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 1 auto;max-height:50%;min-height:132px;transition:height .2s ease,max-height .2s ease;border-top:3px dashed var(--border);background:var(--card);border-radius:26px 26px 0 0;padding:14px 16px calc(var(--safe-bottom) + 76px);overflow-y:auto;overscroll-behavior:contain;-webkit-overflow-scrolling:touch;box-shadow:0 -6px 20px #f76d971a}.split-question .a-region{max-height:28%}.split-answer .a-region{max-height:66%}.quiz-fab-row{position:fixed;right:16px;bottom:calc(var(--safe-bottom) + 14px);z-index:30;display:flex;align-items:center;gap:10px}.quiz-fab-mini{width:48px;height:48px;flex:0 0 auto;border:2px solid var(--border);border-radius:999px;background:var(--card);font-size:20px;line-height:1;box-shadow:var(--shadow);transition:transform .08s ease}.quiz-fab-mini.has{border-color:var(--primary);background:var(--card-soft)}.quiz-fab-mini:active{transform:scale(.94)}.quiz-fab-mini:disabled{opacity:.45;box-shadow:none}.quiz-fab{border:none;border-radius:999px;padding:15px 26px;font-size:16px;font-weight:800;font-family:inherit;color:var(--primary-ink);background:linear-gradient(135deg,var(--primary),var(--primary-strong));box-shadow:0 8px 20px #f76d9766;transition:transform .08s ease}.quiz-fab:active{transform:scale(.97)}.quiz-fab:disabled{color:#fff;background:var(--border);box-shadow:var(--shadow-sm)}.quiz-grabber{display:flex;justify-content:center;align-items:center;height:40px;margin:-12px 0 2px;cursor:grab;touch-action:none;user-select:none;-webkit-user-select:none}.quiz-grabber-bar{width:44px;height:5px;border-radius:999px;background:var(--border);transition:background .12s ease,width .12s ease}.quiz-grabber:active .quiz-grabber-bar,.quiz-grabber.dragging .quiz-grabber-bar{width:60px;background:var(--primary)}.choice{display:flex;gap:12px;align-items:center;width:fit-content;max-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)}.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))}.year-group{margin-bottom:9px}.year-head{display:flex;align-items:center;gap:10px;width:100%;border:2px solid var(--border-soft);border-radius:18px;background:var(--card);box-shadow:var(--shadow-sm);padding:14px 15px;font-family:inherit;font-size:14px;font-weight:800;color:var(--text);text-align:left}.year-group.open .year-head{border-color:var(--border);background:var(--card-soft)}.year-caret{color:var(--primary-strong);font-size:11px;transition:transform .15s ease}.year-group.open .year-caret{transform:rotate(90deg)}.year-name{flex:1 1 auto}.year-meta{display:flex;align-items:center;gap:8px;font-size:12px;font-weight:700;color:var(--text-dim)}.year-count{background:var(--card-soft);border:2px solid var(--border-soft);border-radius:999px;padding:2px 9px;color:var(--primary-strong)}.year-body{padding:9px 0 0 10px}.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)}.q-part{border-top:1px dashed var(--border);padding-top:12px;margin-bottom:6px}.q-part:first-of-type{border-top:none;padding-top:0}.q-part-text{display:flex;gap:8px;font-size:15px;line-height:1.8;white-space:pre-wrap;margin-bottom:10px}.q-part-label{flex:0 0 auto;width:24px;height:24px;border-radius:50%;background:var(--card-soft);color:var(--primary-strong);display:flex;align-items:center;justify-content:center;font-weight:800;font-size:13px}.q-part-choices{display:flex;flex-wrap:wrap;gap:8px}.choice.compact{flex:0 1 auto;padding:10px 12px;margin-bottom:0;font-size:14px}.choice.compact .choice-label{width:24px;height:24px;font-size:13px}.score-banner{text-align:center;font-weight:800;font-size:16px;padding:10px;border-radius:16px;background:var(--card-soft);margin-bottom:10px}.wb-blanks{display:flex;flex-direction:column;gap:8px;margin-top:14px}.wb-blank{display:flex;flex-wrap:wrap;align-items:center;gap:8px;border:2px solid var(--border);border-radius:14px;padding:10px 12px;background:#fff;font-size:14px;font-weight:600;line-height:1.5}.wb-blank.filled{border-color:var(--primary);background:var(--card-soft)}.wb-blank.correct{border-color:var(--correct);background:var(--correct-bg)}.wb-blank.wrong{border-color:var(--wrong);background:var(--wrong-bg)}.wb-mark{flex:0 0 auto;width:26px;height:26px;border-radius:50%;background:var(--card-soft);color:var(--primary-strong);display:flex;align-items:center;justify-content:center;font-weight:800;font-size:14px}.wb-answer{flex:1 1 auto;min-width:0}.wb-correct{flex:1 0 100%;color:var(--correct);font-size:13px;font-weight:700;padding-left:34px}.wb-pool-label{font-size:12px;color:var(--text-dim);font-weight:700;margin-bottom:8px}.wb-pool{display:flex;flex-wrap:wrap;gap:8px}.choice.wb-option{position:relative;padding-right:14px}.choice.wb-option.used{border-color:var(--primary);background:var(--card-soft);color:var(--text-dim)}.choice.wb-option.used .choice-label{opacity:.45}.choice.wb-option:disabled{opacity:1}.wb-badge{position:absolute;top:-8px;left:-8px;min-width:22px;height:22px;padding:0 4px;border-radius:999px;background:var(--primary);color:#fff;display:flex;align-items:center;justify-content:center;font-size:12px;font-weight:800;box-shadow:0 2px 6px #0000002e}.pull-refresh{position:fixed;top:calc(var(--safe-top) + 4px);left:50%;z-index:60;margin-left:-70px;width:140px;padding:8px 0;border-radius:999px;background:#fff;box-shadow:0 6px 16px #0000001f;color:var(--text-dim);font-size:12px;font-weight:700;text-align:center;pointer-events:none}.pull-refresh-icon{margin-right:6px;display:inline-block;transition:transform .2s ease}.pull-refresh-icon.ready{color:var(--primary-strong);transform:rotate(180deg)}