:root{--primary: #4F46E5;--primary-hover: #4338CA;--success: #10B981;--danger: #EF4444;--warning: #F59E0B;--bg: #F8FAFC;--card-bg: #FFFFFF;--text: #1E293B;--text-secondary: #64748B;--border: #E2E8F0;--radius: 12px}*{margin:0;padding:0;box-sizing:border-box}body{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,sans-serif;background:var(--bg);color:var(--text);line-height:1.6}.loading-screen{display:flex;justify-content:center;align-items:center;min-height:100vh;font-size:1.2rem;color:var(--text-secondary)}.btn-primary{background:var(--primary);color:#fff;border:none;padding:12px 24px;border-radius:var(--radius);font-size:1rem;cursor:pointer;transition:background .2s}.btn-primary:hover{background:var(--primary-hover)}.btn-sm{padding:8px 16px;font-size:.9rem}.btn-secondary{background:#fff;color:var(--primary);border:1px solid var(--primary);padding:8px 16px;border-radius:var(--radius);cursor:pointer;text-decoration:none;font-size:.9rem}.btn-text{background:none;border:none;color:var(--text-secondary);cursor:pointer;padding:8px}.auth-page{display:flex;justify-content:center;align-items:center;min-height:100vh;padding:20px}.auth-card{background:var(--card-bg);padding:40px;border-radius:var(--radius);box-shadow:0 4px 24px #00000014;width:100%;max-width:400px}.auth-card h1{font-size:1.8rem;color:var(--primary);margin-bottom:8px}.auth-card h2{font-size:1.2rem;color:var(--text-secondary);margin-bottom:24px}.auth-card form{display:flex;flex-direction:column;gap:12px}.auth-card input{padding:12px 16px;border:1px solid var(--border);border-radius:var(--radius);font-size:1rem}.auth-link{margin-top:16px;text-align:center;color:var(--text-secondary)}.auth-link a{color:var(--primary);text-decoration:none}.error-msg{background:#fef2f2;color:var(--danger);padding:10px;border-radius:var(--radius);margin-bottom:12px}.onboarding-page{display:flex;justify-content:center;align-items:center;min-height:100vh;padding:20px}.onboarding-card{background:var(--card-bg);padding:40px;border-radius:var(--radius);box-shadow:0 4px 24px #00000014;width:100%;max-width:500px}.steps-indicator{display:flex;justify-content:center;gap:12px;margin-bottom:32px}.step-dot{width:12px;height:12px;border-radius:50%;background:var(--border);transition:all .3s}.step-dot.active{background:var(--primary);width:32px;border-radius:6px}.goal-cards,.level-cards,.intensity-cards,.notification-cards{display:flex;flex-direction:column;gap:12px}.goal-card,.level-card,.intensity-card,.notification-card{background:var(--card-bg);border:2px solid var(--border);border-radius:var(--radius);padding:16px;font-size:1rem;cursor:pointer;transition:all .2s;text-align:left}.goal-card:hover,.level-card:hover,.intensity-card:hover,.notification-card:hover{border-color:var(--primary);background:#eef2ff}.dashboard-header{display:flex;justify-content:space-between;align-items:center;padding:20px 24px;background:var(--card-bg);border-bottom:1px solid var(--border)}.dashboard-header h1{font-size:1.5rem;color:var(--primary)}.user-info{color:var(--text-secondary);font-size:.9rem}.header-actions{display:flex;gap:12px;align-items:center}.dashboard-content{max-width:960px;margin:0 auto;padding:24px}.streak-section{margin-bottom:24px}.streak-card{display:flex;align-items:center;gap:8px;background:linear-gradient(135deg,#fff7ed,#ffedd5);padding:16px 24px;border-radius:var(--radius)}.streak-fire{font-size:1.5rem}.streak-count{font-size:2rem;font-weight:700;color:#ea580c}.streak-label{color:#9a3412}.level-section{margin-bottom:32px}.level-title{font-size:1.3rem;margin-bottom:16px;color:var(--text)}.topics-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:16px}.topic-card{background:var(--card-bg);padding:20px;border-radius:var(--radius);border:1px solid var(--border);transition:box-shadow .2s}.topic-card:hover{box-shadow:0 4px 16px #0000000f}.topic-card h3{margin-bottom:8px}.topic-card p{color:var(--text-secondary);font-size:.9rem;margin-bottom:12px}.vocab-section{margin-top:24px}.vocab-section h2{margin-bottom:12px}.vocab-mini-list{display:flex;flex-direction:column;gap:8px;margin-bottom:12px}.vocab-mini-card{background:var(--card-bg);padding:12px 16px;border-radius:var(--radius);border:1px solid var(--border)}.report-float-btn{position:fixed;bottom:24px;right:24px;width:56px;height:56px;border-radius:50%;background:var(--primary);color:#fff;border:none;font-size:1.5rem;cursor:pointer;box-shadow:0 4px 16px #4f46e54d;transition:transform .2s}.report-float-btn:hover{transform:scale(1.1)}.practice-page{max-width:640px;margin:0 auto;padding:20px}.practice-header{display:flex;align-items:center;gap:16px;margin-bottom:24px}.progress-bar{flex:1;height:8px;background:var(--border);border-radius:4px;overflow:hidden}.progress-fill{height:100%;background:var(--primary);transition:width .3s}.streak-badge{background:#fef3c7;color:#d97706;padding:4px 12px;border-radius:20px;font-weight:700}.question-card{background:var(--card-bg);padding:32px;border-radius:var(--radius);border:1px solid var(--border);margin-bottom:16px}.question-text{font-size:1.2rem;margin-bottom:20px;line-height:1.8}.question-audio{width:100%;margin-bottom:16px}.answer-input{width:100%;padding:14px 18px;border:2px solid var(--border);border-radius:var(--radius);font-size:1.1rem;margin-bottom:16px;transition:border-color .2s}.answer-input:focus{outline:none;border-color:var(--primary)}.answer-input.correct{border-color:var(--success)}.answer-input.wrong{border-color:var(--danger)}.result-block{text-align:center;padding:20px}.result-icon{font-size:3rem;margin-bottom:12px}.result-text{font-size:1.1rem;margin-bottom:8px;color:var(--text-secondary)}.correct-answer{color:var(--success);font-weight:700;margin-bottom:16px}.hint-btn{margin-top:8px;display:block;width:100%}.vocabulary-page{max-width:640px;margin:0 auto;padding:20px}.page-header{display:flex;align-items:center;gap:16px;margin-bottom:24px}.page-header h1{flex:1;font-size:1.3rem}.vocab-card{background:var(--card-bg);padding:32px;border-radius:var(--radius);border:1px solid var(--border);text-align:center}.vocab-word{font-size:2rem;margin-bottom:8px}.vocab-transcription{color:var(--text-secondary);font-size:1rem;margin-bottom:16px}.vocab-audio{margin-bottom:16px;width:100%}.srs-badge{color:#f59e0b;font-size:1.2rem;margin-bottom:16px}.options-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:12px;margin:24px 0}.option-btn{background:var(--card-bg);border:2px solid var(--border);padding:14px;border-radius:var(--radius);font-size:1rem;cursor:pointer;transition:all .2s}.option-btn:hover:not(:disabled){border-color:var(--primary)}.option-btn.correct{border-color:var(--success);background:#ecfdf5}.option-btn.wrong{border-color:var(--danger);background:#fef2f2}.vocab-result{margin-top:20px}.vocab-result p{margin-bottom:12px;font-size:1.1rem}.examples{text-align:left;margin:16px 0}.example-text{color:var(--text-secondary);font-style:italic;margin-bottom:4px}@keyframes fadeIn{0%{opacity:0;transform:translateY(10px)}to{opacity:1;transform:translateY(0)}}.question-card,.vocab-card{animation:fadeIn .3s ease-out}.admin-layout{display:flex;min-height:100vh}.admin-sidebar{width:240px;background:#1e293b;color:#fff;display:flex;flex-direction:column;padding:24px 0;position:sticky;top:0;height:100vh}.admin-logo{font-size:1.2rem;font-weight:700;padding:0 20px 24px;border-bottom:1px solid #334155;margin-bottom:16px;color:#818cf8}.admin-nav{flex:1;display:flex;flex-direction:column;gap:4px;padding:0 8px}.admin-nav-item{display:block;padding:10px 16px;border-radius:8px;color:#cbd5e1;text-decoration:none;transition:all .15s;font-size:.95rem}.admin-nav-item:hover{background:#334155;color:#fff}.admin-nav-item.active{background:#4f46e5;color:#fff}.admin-sidebar-footer{padding:16px 20px;border-top:1px solid #334155;display:flex;justify-content:space-between}.admin-back-link{color:#94a3b8;text-decoration:none;font-size:.9rem}.admin-back-link:hover{color:#fff}.admin-content{flex:1;padding:32px;background:var(--bg);overflow-y:auto}.admin-page h1{font-size:1.5rem;margin-bottom:4px}.admin-page-header{display:flex;align-items:center;gap:12px;margin-bottom:24px}.admin-subtitle{color:var(--text-secondary);margin-bottom:24px}.badge{display:inline-flex;align-items:center;padding:4px 12px;border-radius:20px;font-size:.85rem;font-weight:600;background:#eef2ff;color:var(--primary)}.badge-sm{font-size:.75rem;padding:2px 8px}.stat-cards{display:grid;grid-template-columns:repeat(3,1fr);gap:16px;margin-bottom:32px}.stat-card{background:var(--card-bg);padding:24px;border-radius:var(--radius);border:1px solid var(--border);text-align:center}.stat-number{font-size:2.5rem;font-weight:700;color:var(--primary)}.stat-label{color:var(--text-secondary);margin-top:4px}.quick-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:12px;margin-top:12px}.quick-card{display:flex;align-items:center;gap:12px;background:var(--card-bg);padding:20px;border-radius:var(--radius);border:1px solid var(--border);text-decoration:none;color:var(--text);transition:box-shadow .2s}.quick-card:hover{box-shadow:0 4px 12px #0000000f}.quick-icon{font-size:1.5rem}.admin-form{background:var(--card-bg);padding:20px;border-radius:var(--radius);border:1px solid var(--border);margin-bottom:24px}.admin-form h3{margin-bottom:12px;font-size:1rem;color:var(--text-secondary)}.form-row{display:flex;gap:8px;flex-wrap:wrap}.form-row input,.form-row select{padding:10px 14px;border:1px solid var(--border);border-radius:var(--radius);font-size:.95rem;flex:1;min-width:150px}.form-row select{min-width:80px;flex:0 0 auto}.level-selector{padding:8px 14px;border:1px solid var(--border);border-radius:var(--radius);font-size:.95rem}.admin-list{display:flex;flex-direction:column;gap:8px}.list-header{display:flex;justify-content:space-between;align-items:center;padding:8px 0;color:var(--text-secondary);font-size:.9rem}.admin-list-item{display:flex;justify-content:space-between;align-items:center;background:var(--card-bg);padding:16px 20px;border-radius:var(--radius);border:1px solid var(--border);transition:box-shadow .15s}.admin-list-item:hover{box-shadow:0 2px 8px #0000000a}.item-main{display:flex;align-items:center;gap:12px;flex:1}.item-info p{color:var(--text-secondary);font-size:.9rem;margin-top:2px}.item-actions{display:flex;align-items:center;gap:8px}.level-code{display:inline-flex;align-items:center;justify-content:center;width:44px;height:44px;border-radius:10px;background:#eef2ff;color:var(--primary);font-weight:700;font-size:1rem}.btn-danger{background:#fef2f2;color:var(--danger);border:1px solid #FECACA;padding:6px 12px;border-radius:var(--radius);cursor:pointer;font-size:.85rem;transition:all .15s}.btn-danger:hover{background:var(--danger);color:#fff}.admin-filters{display:flex;gap:8px;margin-bottom:20px}.admin-filters select{padding:10px 14px;border:1px solid var(--border);border-radius:var(--radius);font-size:.95rem}.admin-filters select.placeholder{color:var(--text-secondary)}.admin-card{background:var(--card-bg);padding:20px;border-radius:var(--radius);border:1px solid var(--border);margin-bottom:24px}.admin-card h3{margin-bottom:8px}.admin-hint{color:var(--text-secondary);font-size:.85rem;margin-bottom:12px}.admin-hint code{background:#f1f5f9;padding:2px 6px;border-radius:4px;font-size:.85rem}.bulk-textarea{width:100%;padding:12px;border:1px solid var(--border);border-radius:var(--radius);font-family:monospace;font-size:.9rem;resize:vertical;margin-bottom:12px}.sentence-item .sentence-text{font-weight:600;font-size:1rem;margin-bottom:4px}.sentence-answer{color:var(--success);font-size:.9rem}.sentence-translation{color:var(--text-secondary);font-style:italic}.sentence-hint{color:var(--warning);font-size:.85rem}.report-item.new{border-left:3px solid #F59E0B}.report-item.resolved{border-left:3px solid var(--success);opacity:.7}.report-meta{display:flex;gap:8px;margin-bottom:4px}.report-status{text-transform:capitalize;color:var(--text-secondary);font-size:.85rem}.empty-state{text-align:center;padding:40px;color:var(--text-secondary)}@media (max-width: 768px){.admin-sidebar{width:60px}.admin-logo,.admin-nav-item span,.admin-sidebar-footer{display:none}.admin-content{padding:16px}.stat-cards,.quick-grid{grid-template-columns:1fr}.form-row{flex-direction:column}}.vocab-stats-page{max-width:720px;margin:0 auto;padding:20px}.stats-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:16px;margin-bottom:24px}.stat-card-big{background:var(--card-bg);padding:24px;border-radius:var(--radius);border:1px solid var(--border);text-align:center}.stat-card-big p{color:var(--text-secondary);font-size:.9rem;margin-top:8px}.stat-big-number{font-size:2.5rem;font-weight:700;color:var(--primary)}.stat-circle{width:80px;height:80px;border-radius:50%;background:conic-gradient(var(--primary) calc(var(--pct) * 3.6deg),var(--border) 0);display:flex;align-items:center;justify-content:center;margin:0 auto 8px}.stat-circle span{width:64px;height:64px;border-radius:50%;background:#fff;display:flex;align-items:center;justify-content:center;font-weight:700;font-size:1.1rem}.stats-details{background:var(--card-bg);border-radius:var(--radius);border:1px solid var(--border);margin-bottom:24px}.detail-row{display:flex;justify-content:space-between;padding:12px 16px;border-bottom:1px solid var(--border)}.detail-row:last-child{border-bottom:none}.detail-row span{color:var(--text-secondary)}.word-filter{display:flex;gap:8px;margin-bottom:16px}.btn-filter{padding:6px 16px;border:1px solid var(--border);border-radius:20px;background:#fff;cursor:pointer;font-size:.9rem;transition:all .15s}.btn-filter.active{background:var(--primary);color:#fff;border-color:var(--primary)}.word-list{display:flex;flex-direction:column;gap:4px}.word-list-item{display:flex;justify-content:space-between;align-items:center;background:var(--card-bg);padding:10px 16px;border-radius:8px;border:1px solid var(--border)}.translation{color:var(--text-secondary);margin-left:4px}.word-status{min-width:30px;text-align:right}.srs-dots{color:#f59e0b;letter-spacing:2px}.text-success{color:var(--success)}.text-danger{color:var(--danger)}.vocab-add-card{background:var(--card-bg);padding:16px;border-radius:var(--radius);border:1px solid var(--border);margin-bottom:12px;animation:fadeIn .2s}.vocab-add-card h3{margin-bottom:8px;font-size:.95rem}.vocab-add-card form{display:flex;gap:8px;flex-wrap:wrap}.vocab-add-card input{flex:1;min-width:120px;padding:8px 12px;border:1px solid var(--border);border-radius:var(--radius);font-size:.9rem}.add-form-inline{display:flex;gap:8px}.add-word-btn{margin-top:8px;width:100%;text-align:center;padding:10px}.add-msg{margin-top:8px;font-size:.9rem}.vocab-stats{background:var(--card-bg);padding:16px;border-radius:var(--radius);border:1px solid var(--border);margin-bottom:20px}.stat-row{display:flex;gap:24px;flex-wrap:wrap;margin-bottom:4px}.stat-row span{color:var(--text-secondary);font-size:.9rem}.stat-row strong{color:var(--text)}.result-msg{font-size:1rem;margin-bottom:8px}.next-review{color:var(--text-secondary);font-size:.85rem;margin-bottom:12px}.animate-in{animation:fadeIn .2s}.add-word-btn-practice{display:block;width:100%;margin-top:12px;padding:10px;font-size:.95rem}.option-btn.faded{opacity:.5}.listening-page{max-width:640px;margin:0 auto;padding:20px}.listening-card{background:var(--card-bg);padding:32px;border-radius:var(--radius);border:1px solid var(--border);text-align:center;animation:fadeIn .3s}.listening-type-label{font-size:1.1rem;color:var(--text-secondary);margin-bottom:24px;font-weight:400}.audio-player{display:flex;align-items:center;gap:12px;justify-content:center;margin-bottom:16px}.listening-audio{flex:1;max-width:300px}.speed-controls{display:flex;align-items:center;justify-content:center;gap:8px;margin-bottom:16px}.speed-controls span{color:var(--text-secondary);font-size:.9rem}.speed-btn{padding:4px 12px;border:1px solid var(--border);border-radius:16px;background:#fff;cursor:pointer;font-size:.85rem;transition:all .15s}.speed-btn.active{background:var(--primary);color:#fff;border-color:var(--primary)}.subtitles-btn{display:block;width:100%;margin-bottom:8px}.subtitles-text{background:#f8fafc;padding:12px;border-radius:var(--radius);font-style:italic;color:var(--text-secondary);margin-bottom:16px;animation:fadeIn .2s}.options-grid-2{grid-template-columns:1fr 1fr}@media (max-width: 640px){.listening-audio{max-width:100%}.audio-player{flex-direction:column}}@media (max-width: 480px){.options-grid,.topics-grid{grid-template-columns:1fr}.auth-card{padding:24px}}