:root{--bg-primary:#f9fafb;--bg-secondary:#fff;--text-primary:#0f172a;--text-secondary:#475569;--text-muted:#94a3b8;--primary:#3b82f6;--primary-hover:#2563eb;--primary-light:#eff6ff;--secondary:#10b981;--secondary-hover:#059669;--secondary-light:#ecfdf5;--error:#ef4444;--error-light:#fef2f2;--warning:#f59e0b;--warning-light:#fffbeb;--hiragana:#6366f1;--katakana:#a855f7;--shadow-sm:0 1px 2px 0 #0000000d;--shadow-md:0 4px 6px -1px #0000001a, 0 2px 4px -2px #0000001a;--shadow-lg:0 10px 15px -3px #0000001a, 0 4px 6px -4px #0000001a;--radius-sm:8px;--radius-md:12px;--radius-lg:16px;--radius-full:9999px;--transition:all .2s cubic-bezier(.4, 0, .2, 1)}*{box-sizing:border-box;margin:0;padding:0}body{background-color:var(--bg-primary);color:var(--text-primary);-webkit-font-smoothing:antialiased;font-family:Inter,Noto Sans JP,sans-serif;line-height:1.5}.app-container{flex-direction:column;min-height:100vh;display:flex}.top-nav{z-index:50;-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px);background:#fffc;border-bottom:1px solid #e2e8f0;justify-content:center;padding:.75rem 1rem;display:flex;position:sticky;top:0}.nav-content{justify-content:space-between;align-items:center;width:100%;max-width:1000px;display:flex}.brand{color:var(--primary);cursor:pointer;align-items:center;gap:.5rem;font-size:1.25rem;font-weight:700;text-decoration:none;display:flex}.status-chips{align-items:center;gap:.75rem;display:flex}.chip{background:var(--bg-secondary);border-radius:var(--radius-full);box-shadow:var(--shadow-sm);border:1px solid #e2e8f0;align-items:center;gap:.375rem;padding:.375rem .75rem;font-size:.875rem;font-weight:600;display:flex}.avatar{border-radius:var(--radius-full);background:linear-gradient(135deg, var(--primary), var(--secondary));width:32px;height:32px;box-shadow:var(--shadow-sm);border:2px solid #fff}.main-content{flex:1;width:100%;max-width:1000px;margin:0 auto;padding:2rem 1rem}.dashboard-grid{grid-template-columns:1fr 300px;gap:2rem;display:grid}@media (width<=768px){.dashboard-grid{grid-template-columns:1fr}}.lesson-grid{grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:1.5rem;display:grid}.sidebar{flex-direction:column;gap:1.5rem;display:flex}.card{background:var(--bg-secondary);border-radius:var(--radius-lg);transition:var(--transition);border:1px solid #e2e8f0;padding:1.5rem;position:relative;overflow:hidden}.card-hover:hover{box-shadow:var(--shadow-lg);border-color:var(--primary);transform:translateY(-4px)}.lesson-card.locked{opacity:.6;cursor:not-allowed;filter:grayscale(.5)}.card-title{margin-bottom:.5rem;font-size:1.25rem;font-weight:700}.card-desc{color:var(--text-secondary);margin-bottom:1.5rem;font-size:.875rem}.btn{border-radius:var(--radius-md);cursor:pointer;transition:var(--transition);border:none;justify-content:center;align-items:center;gap:.5rem;padding:.625rem 1.25rem;font-family:inherit;font-size:.875rem;font-weight:600;display:inline-flex}.btn:active{transform:scale(.97)}.btn:disabled{opacity:.5;cursor:not-allowed}.btn-primary{background:var(--primary);color:#fff}.btn-primary:hover:not(:disabled){background:var(--primary-hover);box-shadow:0 4px 12px #3b82f64d}.btn-outline{color:var(--text-secondary);background:0 0;border:1px solid #e2e8f0}.btn-outline:hover:not(:disabled){background:var(--bg-primary);border-color:var(--text-muted)}.btn-full{width:100%}.progress-wrapper{border-radius:var(--radius-full);background:#e2e8f0;width:100%;height:8px;margin:.5rem 0;overflow:hidden}.progress-fill{background:linear-gradient(90deg, var(--primary), var(--secondary));height:100%;transition:width .5s ease-out}.badge{border-radius:var(--radius-full);text-transform:uppercase;padding:.25rem .625rem;font-size:.75rem;font-weight:700}.badge-success{background:var(--secondary-light);color:var(--secondary-hover)}.badge-primary{background:var(--primary-light);color:var(--primary-hover)}.badge-muted{color:var(--text-muted);background:#f1f5f9;border:1px solid #e2e8f0}.badge-hiragana{color:var(--hiragana);background:#e0e7ff}.badge-katakana{color:var(--katakana);background:#f3e8ff}.lesson-container{width:100%;max-width:600px;margin:0 auto}.step-indicator{justify-content:space-between;margin-bottom:2rem;display:flex;position:relative}.step-indicator:before{content:"";z-index:1;background:#e2e8f0;height:2px;position:absolute;top:15px;left:0;right:0}.step{border-radius:var(--radius-full);background:var(--bg-secondary);z-index:2;width:32px;height:32px;transition:var(--transition);border:2px solid #e2e8f0;justify-content:center;align-items:center;font-size:.75rem;font-weight:700;display:flex}.step.active{border-color:var(--primary);background:var(--primary);color:#fff;box-shadow:0 0 0 4px var(--primary-light)}.step.completed{border-color:var(--secondary);background:var(--secondary);color:#fff}.flashcard-card{text-align:center;flex-direction:column;justify-content:center;align-items:center;min-height:400px;padding:3rem;animation:.3s ease-out fadeIn;display:flex}@keyframes fadeIn{0%{opacity:0;transform:translateY(10px)}to{opacity:1;transform:translateY(0)}}.jp-large{margin-bottom:.5rem;font-size:clamp(2.5rem,8vw,4.5rem);font-weight:700;line-height:1.2}.romaji-muted{color:var(--text-muted);margin-bottom:1.5rem;font-size:1.25rem}.english-bold{color:var(--primary);margin-bottom:2rem;font-size:2rem;font-weight:800}.example-area{background:var(--bg-primary);border-radius:var(--radius-md);width:100%;color:var(--text-secondary);padding:1.5rem;font-size:1.1rem}.highlight{color:var(--text-primary);border-bottom:3px solid var(--warning);font-weight:700}.quiz-options{flex-direction:column;gap:1rem;width:100%;display:flex}.option-card{border-radius:var(--radius-md);background:var(--bg-secondary);cursor:pointer;transition:var(--transition);border:2px solid #e2e8f0;justify-content:space-between;align-items:center;padding:1.25rem;font-size:1.125rem;font-weight:600;display:flex}.option-card:hover:not(.checked),.option-card.selected{border-color:var(--primary);background:var(--primary-light)}.option-card.correct{border-color:var(--secondary);background:var(--secondary-light);color:var(--secondary-hover)}.option-card.wrong{border-color:var(--error);background:var(--error-light);color:var(--error)}.input-modern{border-radius:var(--radius-md);width:100%;transition:var(--transition);text-align:center;border:2px solid #e2e8f0;outline:none;padding:1rem;font-size:1.25rem}.input-modern:focus{border-color:var(--primary);box-shadow:0 0 0 4px var(--primary-light)}.feedback-banner{border-radius:var(--radius-lg);align-items:center;gap:1rem;margin-top:2rem;padding:1.25rem;animation:.3s ease-out slideUp;display:flex}@keyframes slideUp{0%{opacity:0;transform:translateY(20px)}to{opacity:1;transform:translateY(0)}}.feedback-banner.success{background:var(--secondary-light);border:1px solid var(--secondary)}.feedback-banner.error{background:var(--error-light);border:1px solid var(--error)}.summary-grid{grid-template-columns:repeat(3,1fr);gap:1rem;margin:2rem 0;display:grid}@media (width<=480px){.summary-grid{grid-template-columns:1fr}}.stat-card{text-align:center;padding:1.5rem}.stat-val{font-size:1.75rem;font-weight:800;display:block}.stat-label{text-transform:uppercase;color:var(--text-muted);font-size:.75rem;font-weight:700}.mascot-container{justify-content:center;margin-bottom:2rem;display:flex}.avatar-circle{border-radius:var(--radius-full);width:80px;height:80px;box-shadow:var(--shadow-md);background:#fff;border:2px solid #e2e8f0;justify-content:center;align-items:center;display:flex}.intro-card{text-align:center;padding:3rem}.footer-nav-modern{justify-content:space-between;align-items:center;gap:1rem;margin-top:2rem;display:flex}.view-enter{opacity:0;transform:scale(.98)}.view-enter-active{opacity:1;transition:opacity .3s,transform .3s;transform:scale(1)}.pulse{animation:2s infinite pulse}@keyframes pulse{0%{transform:scale(1)}50%{transform:scale(1.05)}to{transform:scale(1)}}.card-header-actions{z-index:10;gap:.5rem;display:flex;position:absolute;top:1rem;right:1rem}.speaker-btn{color:var(--text-muted);border-radius:var(--radius-md);cursor:pointer;width:44px;height:44px;transition:var(--transition);background:0 0;border:2px solid #e2e8f0;outline:none;justify-content:center;align-items:center;padding:0;display:flex}.speaker-btn:hover{background:var(--primary-light);border-color:var(--primary);color:var(--primary)}.speaker-btn.playing{background:var(--primary);border-color:var(--primary);color:#fff;animation:1s infinite speaker-pulse}@keyframes speaker-pulse{0%{transform:scale(1);box-shadow:0 0 #3b82f666}70%{transform:scale(1.05);box-shadow:0 0 0 10px #3b82f600}to{transform:scale(1);box-shadow:0 0 #3b82f600}}.sound-wave-1,.sound-wave-2{opacity:.5}.playing .sound-wave-1{animation:.6s infinite alternate wave-pulse}.playing .sound-wave-2{animation:.6s .3s infinite alternate wave-pulse}@keyframes wave-pulse{0%{opacity:.2}to{opacity:1}}.romaji-inline{color:var(--text-muted);margin-left:.5rem;font-size:1.5rem;font-weight:500}.romaji-inline-small{color:var(--text-muted);margin-left:.3rem;font-size:1rem;font-weight:400}.romaji-muted{display:none}.audio-prompt{background:var(--warning-light);color:var(--warning);border-radius:var(--radius-md);text-align:center;cursor:pointer;border:1px solid var(--warning);margin-bottom:1rem;padding:.5rem 1rem;font-size:.875rem;font-weight:600;animation:.3s ease-out slideDown}@keyframes slideDown{0%{opacity:0;transform:translateY(-10px)}to{opacity:1;transform:translateY(0)}}.status-icons{align-items:center;font-size:1.25rem;display:flex}.icon-check{color:var(--secondary);font-weight:900}.icon-x{color:var(--error);font-weight:900}.script-grid{grid-template-columns:1fr 1fr;gap:1rem;display:grid}