*,*:before,*:after{box-sizing:border-box;margin:0;padding:0}:root{--primary: #1a5c3c;--primary-light: #2a7a52;--primary-dark: #0e3d28;--gold: #c9a227;--gold-light: #e8c14a;--bg: #f5f5f0;--card-bg: #ffffff;--text: #1a1a1a;--text-muted: #666666;--border: #e0e0d8;--correct: #2e7d32;--wrong: #c62828;--correct-bg: #e8f5e9;--wrong-bg: #ffebee;--nav-h: 64px;--header-h: 52px;--radius: 12px;--shadow: 0 2px 8px rgba(0,0,0,.1)}html,body{height:100%;overflow:hidden;background:var(--bg);color:var(--text);font-family:-apple-system,BlinkMacSystemFont,Hiragino Sans,Yu Gothic,sans-serif;font-size:16px;line-height:1.6;-webkit-text-size-adjust:100%}#app{display:flex;flex-direction:column;height:100dvh;height:100vh;max-width:600px;margin:0 auto;position:relative;background:var(--bg);box-shadow:0 0 20px #00000026}#app-header{height:var(--header-h);background:var(--primary);color:#fff;flex-shrink:0;z-index:10}.header-inner{display:flex;align-items:center;gap:10px;padding:0 16px;height:100%}.header-icon{font-size:1.4rem}.header-title{font-size:1.05rem;font-weight:700;letter-spacing:.02em}#main-content{flex:1;overflow-y:auto;overflow-x:hidden;-webkit-overflow-scrolling:touch;padding-bottom:8px}#bottom-nav{height:var(--nav-h);display:flex;background:#fff;border-top:1px solid var(--border);flex-shrink:0;z-index:10}.nav-btn{flex:1;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:2px;border:none;background:none;cursor:pointer;color:var(--text-muted);transition:color .2s;padding:6px 2px;-webkit-tap-highlight-color:transparent}.nav-btn.active{color:var(--primary)}.nav-icon{font-size:1.3rem}.nav-label{font-size:.65rem;font-weight:500}.card{background:var(--card-bg);border-radius:var(--radius);box-shadow:var(--shadow);padding:16px;margin:0 12px 12px}.card-title{font-size:1rem;font-weight:700;color:var(--primary);margin-bottom:8px}.section-header{padding:16px 16px 8px;font-size:1.1rem;font-weight:700;color:var(--primary-dark)}.section-sub{padding:0 16px 12px;font-size:.85rem;color:var(--text-muted)}.home-hero{background:linear-gradient(135deg,var(--primary) 0%,var(--primary-light) 100%);color:#fff;padding:24px 20px;margin-bottom:4px}.home-hero h2{font-size:1.4rem;font-weight:700;margin-bottom:4px}.home-hero p{font-size:.9rem;opacity:.9}.exam-info-grid{display:grid;grid-template-columns:1fr 1fr;gap:10px;padding:12px 12px 0}.exam-info-card{background:#fff;border-radius:var(--radius);padding:14px;text-align:center;box-shadow:var(--shadow)}.exam-info-card .info-value{font-size:1.5rem;font-weight:700;color:var(--primary)}.exam-info-card .info-label{font-size:.75rem;color:var(--text-muted);margin-top:2px}.progress-section{padding:16px 12px 0}.progress-title{font-size:.9rem;font-weight:600;color:var(--text-muted);padding:0 4px 8px}.progress-item{background:#fff;border-radius:10px;padding:12px 14px;margin-bottom:8px;box-shadow:var(--shadow)}.progress-item-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:6px}.progress-item-name{font-size:.9rem;font-weight:600}.progress-item-count{font-size:.8rem;color:var(--text-muted)}.progress-bar-wrap{height:6px;background:var(--border);border-radius:3px;overflow:hidden}.progress-bar-fill{height:100%;background:var(--primary);border-radius:3px;transition:width .5s ease}.quick-start-grid{display:grid;grid-template-columns:1fr 1fr;gap:10px;padding:12px}.quick-btn{display:flex;flex-direction:column;align-items:center;gap:6px;padding:16px 8px;background:#fff;border:2px solid var(--border);border-radius:var(--radius);cursor:pointer;font-size:.85rem;font-weight:600;color:var(--primary);transition:all .2s;-webkit-tap-highlight-color:transparent}.quick-btn:active{transform:scale(.97)}.quick-btn .quick-icon{font-size:1.8rem}.learn-tabs{display:flex;gap:6px;padding:12px 12px 0;overflow-x:auto;scrollbar-width:none}.learn-tabs::-webkit-scrollbar{display:none}.learn-tab{white-space:nowrap;padding:8px 16px;border-radius:20px;border:2px solid var(--border);background:#fff;font-size:.85rem;font-weight:600;color:var(--text-muted);cursor:pointer;transition:all .2s;-webkit-tap-highlight-color:transparent}.learn-tab.active{background:var(--primary);border-color:var(--primary);color:#fff}.learn-content{padding:12px}.learn-card{background:#fff;border-radius:var(--radius);box-shadow:var(--shadow);overflow:hidden;margin-bottom:12px}.learn-card-header{display:flex;justify-content:space-between;align-items:center;padding:14px 16px;cursor:pointer;-webkit-tap-highlight-color:transparent}.learn-card-title-wrap{display:flex;align-items:center;gap:10px}.learn-card-icon{font-size:1.2rem}.learn-card-title{font-size:.95rem;font-weight:700}.learn-card-arrow{font-size:.8rem;color:var(--text-muted);transition:transform .3s}.learn-card.open .learn-card-arrow{transform:rotate(180deg)}.learn-card-body{display:none;padding:0 16px 16px;border-top:1px solid var(--border)}.learn-card.open .learn-card-body{display:block}.learn-card-body h3{font-size:1rem;font-weight:700;color:var(--primary);margin:14px 0 6px}.learn-card-body h4{font-size:.9rem;font-weight:700;color:var(--primary-dark);margin:10px 0 4px}.learn-card-body p{font-size:.88rem;color:var(--text);margin-bottom:6px;line-height:1.7}.learn-card-body ul{padding-left:18px;margin-bottom:6px}.learn-card-body li{font-size:.85rem;line-height:1.7;color:var(--text)}.learn-card-body strong{color:var(--primary-dark)}.japan-card{background:#fff;border-radius:var(--radius);box-shadow:var(--shadow);padding:14px;margin-bottom:10px}.japan-card-name{font-size:.95rem;font-weight:700;color:var(--primary-dark);margin-bottom:4px}.japan-card-meta{display:flex;gap:6px;flex-wrap:wrap;margin-bottom:8px}.badge{padding:2px 8px;border-radius:20px;font-size:.72rem;font-weight:600}.badge-culture{background:#e8f0fe;color:#1a3a7a}.badge-nature{background:#e8f5e9;color:#1a5c3c}.badge-mixed{background:#fff3e0;color:#7a3d00}.badge-year{background:var(--bg);color:var(--text-muted)}.badge-pref{background:#f3e5f5;color:#6a1b9a}.japan-card-criteria{font-size:.8rem;color:var(--text-muted);margin-bottom:6px}.japan-card-desc{font-size:.85rem;line-height:1.6;color:var(--text);margin-bottom:8px}.japan-card-points{padding:8px 10px;background:var(--bg);border-radius:8px}.japan-card-points li{font-size:.8rem;color:var(--text-muted);line-height:1.6;list-style:none;padding-left:12px;position:relative}.japan-card-points li:before{content:"▶";position:absolute;left:0;color:var(--primary);font-size:.6rem;top:4px}.quiz-categories{padding:12px;display:grid;grid-template-columns:1fr 1fr;gap:10px}.quiz-cat-btn{display:flex;flex-direction:column;align-items:center;gap:8px;padding:20px 8px;background:#fff;border:2px solid var(--border);border-radius:var(--radius);cursor:pointer;font-weight:600;transition:all .2s;-webkit-tap-highlight-color:transparent}.quiz-cat-btn:active{transform:scale(.97)}.quiz-cat-icon{font-size:2rem}.quiz-cat-name{font-size:.85rem;color:var(--primary)}.quiz-cat-count{font-size:.75rem;color:var(--text-muted)}.quiz-area{padding:12px}.quiz-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:12px}.quiz-progress-text{font-size:.85rem;color:var(--text-muted)}.quiz-score-text{font-size:.85rem;font-weight:700;color:var(--primary)}.quiz-progress-bar{height:4px;background:var(--border);border-radius:2px;overflow:hidden;margin-bottom:16px}.quiz-progress-fill{height:100%;background:var(--primary);border-radius:2px;transition:width .3s}.quiz-question{background:#fff;border-radius:var(--radius);padding:18px;margin-bottom:14px;box-shadow:var(--shadow);font-size:.95rem;font-weight:500;line-height:1.7}.quiz-choices{display:flex;flex-direction:column;gap:10px;margin-bottom:14px}.choice-btn{width:100%;text-align:left;padding:14px 16px;background:#fff;border:2px solid var(--border);border-radius:var(--radius);font-size:.88rem;line-height:1.5;cursor:pointer;transition:all .2s;-webkit-tap-highlight-color:transparent}.choice-btn:active:not(:disabled){transform:scale(.99)}.choice-btn.selected{border-color:var(--primary);background:#e8f4ee}.choice-btn.correct{border-color:var(--correct);background:var(--correct-bg);color:var(--correct);font-weight:600}.choice-btn.wrong{border-color:var(--wrong);background:var(--wrong-bg);color:var(--wrong)}.choice-btn:disabled{cursor:default}.quiz-explanation{background:#fff8e1;border-left:4px solid var(--gold);border-radius:0 8px 8px 0;padding:12px 14px;font-size:.85rem;line-height:1.7;margin-bottom:14px}.explanation-title{font-weight:700;color:var(--primary-dark);margin-bottom:4px}.quiz-nav{display:flex;gap:10px}.btn{padding:12px 20px;border-radius:var(--radius);border:none;font-size:.9rem;font-weight:700;cursor:pointer;transition:all .2s;-webkit-tap-highlight-color:transparent}.btn:active{transform:scale(.97)}.btn-primary{background:var(--primary);color:#fff}.btn-secondary{background:#fff;color:var(--primary);border:2px solid var(--primary)}.btn-gold{background:var(--gold);color:#fff}.btn-block{width:100%;text-align:center}.result-card{background:#fff;border-radius:var(--radius);padding:24px 20px;margin:12px;box-shadow:var(--shadow);text-align:center}.result-score{font-size:3.5rem;font-weight:700;color:var(--primary);line-height:1;margin:12px 0}.result-label{font-size:.9rem;color:var(--text-muted)}.result-pass{display:inline-block;padding:6px 24px;border-radius:20px;font-size:1rem;font-weight:700;margin:12px 0}.result-pass.pass{background:var(--correct-bg);color:var(--correct)}.result-pass.fail{background:var(--wrong-bg);color:var(--wrong)}.result-detail{font-size:.85rem;color:var(--text-muted);margin-top:8px}.exam-intro{padding:12px}.exam-timer{text-align:center;font-size:2rem;font-weight:700;color:var(--primary);font-variant-numeric:tabular-nums;padding:8px 0}.exam-timer.warning{color:var(--wrong)}.past-sets{padding:12px;display:flex;flex-direction:column;gap:10px}.past-set-btn{display:flex;align-items:center;gap:14px;padding:16px;background:#fff;border:2px solid var(--border);border-radius:var(--radius);cursor:pointer;text-align:left;-webkit-tap-highlight-color:transparent;transition:all .2s}.past-set-btn:active{transform:scale(.98)}.past-set-num{width:44px;height:44px;background:var(--primary);color:#fff;border-radius:50%;display:flex;align-items:center;justify-content:center;font-size:1.1rem;font-weight:700;flex-shrink:0}.past-set-info{flex:1}.past-set-title{font-size:.95rem;font-weight:700;color:var(--primary-dark)}.past-set-desc{font-size:.8rem;color:var(--text-muted);margin-top:2px}.past-set-score{font-size:.85rem;font-weight:700;color:var(--primary)}@keyframes fadeIn{0%{opacity:0;transform:translateY(8px)}to{opacity:1;transform:translateY(0)}}.fade-in{animation:fadeIn .25s ease}#main-content::-webkit-scrollbar{width:4px}#main-content::-webkit-scrollbar-track{background:transparent}#main-content::-webkit-scrollbar-thumb{background:var(--border);border-radius:2px}@media (min-width: 600px){#app{box-shadow:0 0 40px #0003}}