*,:before,:after{box-sizing:border-box;margin:0;padding:0}html{-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;color:#1a1a2e;background:#f5f5f5;font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica Neue,Arial,sans-serif;line-height:1.5}body,#root{min-height:100vh}input{font-family:inherit;line-height:inherit}:root{--bg:#fff;--bg-card:#f9fafb;--bg-input:#fff;--bg-hover:#f3f4f6;--bg-primary-light:#eef2ff;--bg-file-sync:#f0f4ff;--bg-kbd:#e5e7eb;--text-primary:#1a1a2e;--text-secondary:#6b7280;--text-muted:#9ca3af;--text-danger:#991b1b;--text-success:#10b981;--text-warning:#92400e;--border:#d1d5db;--border-light:#e5e7eb;--border-danger:#fecaca;--border-primary-light:#dbeafe;--primary:#4f46e5;--primary-hover:#4338ca;--danger:#ef4444;--danger-bg:#fef2f2;--success-bg:#ecfdf5;--sync-dot:#10b981;--spinner-track:#d1d5db;--spinner-fg:#4f46e5;--nav-active-bg:#eef2ff;--qr-card:linear-gradient(135deg, #4f46e5, #7c3aed)}.dark{--bg:#0f172a;--bg-card:#1e293b;--bg-input:#1e293b;--bg-hover:#334155;--bg-primary-light:#1e1b4b;--bg-file-sync:#172554;--bg-kbd:#334155;--text-primary:#e2e8f0;--text-secondary:#94a3b8;--text-muted:#64748b;--text-danger:#fca5a5;--text-success:#34d399;--text-warning:#fbbf24;--border:#475569;--border-light:#334155;--border-danger:#7f1d1d;--border-primary-light:#1e3a5f;--primary:#6366f1;--primary-hover:#818cf8;--danger:#f87171;--danger-bg:#450a0a;--success-bg:#052e16;--sync-dot:#34d399;--spinner-track:#334155;--spinner-fg:#6366f1;--nav-active-bg:#1e1b4b;--qr-card:linear-gradient(135deg, #6366f1, #a78bfa)}body{background:var(--bg);color:var(--text-primary);margin:0;transition:background .2s,color .2s}.app{flex-direction:column;max-width:640px;min-height:100vh;margin:0 auto;padding:24px 16px;display:flex}.app-header{flex-wrap:wrap;justify-content:space-between;align-items:center;gap:12px;margin-bottom:32px;display:flex}.app-header-left{align-items:center;gap:12px;display:flex}.app-header h1{color:var(--text-primary);margin:0;font-size:24px;font-weight:700}.app-dir-badge{color:var(--text-secondary);background:var(--bg-hover);white-space:nowrap;border-radius:20px;align-items:center;gap:6px;padding:3px 10px;font-size:12px;display:flex}.app-dir-badge .sync-dot{width:6px;height:6px}.app-dir-badge .sync-spinner{width:10px;height:10px}.app-dir-badge--offline{color:#92400e;background:#fef3c7}.dark .app-dir-badge--offline{color:#fbbf24;background:#451a03}.app-nav{gap:8px;display:flex}.app-main{flex:1}.app-banner{background:var(--danger-bg);border:1px solid var(--border-danger);color:var(--text-danger);border-radius:10px;justify-content:space-between;align-items:center;gap:12px;margin-bottom:16px;padding:10px 16px;font-size:14px;display:flex}.error-msg{color:var(--danger);margin:8px 0 0;font-size:14px}.welcome-actions{flex-direction:column;align-items:center;gap:12px;margin-top:24px;display:flex}.wm-io-actions{border-top:1px solid var(--border-primary-light);gap:8px;margin-top:12px;padding-top:12px;display:flex}.app-center{background:var(--bg);justify-content:center;align-items:center;min-height:100vh;padding:24px;display:flex}.loading-spinner{border:3px solid var(--border-light);border-top-color:var(--primary);border-radius:50%;width:32px;height:32px;animation:.6s linear infinite spin}.loading-text{color:var(--text-secondary);margin-top:16px;font-size:15px}.welcome-card{text-align:center;max-width:400px}.welcome-card h1{color:var(--text-primary);margin-bottom:12px;font-size:32px;font-weight:700}.welcome-card p{color:var(--text-secondary);margin-bottom:8px;font-size:15px}.welcome-hint{color:var(--text-muted)!important;font-size:13px!important}.welcome-hint code{background:var(--bg-kbd);border-radius:3px;padding:1px 5px;font-size:12px}.btn-lg{margin-top:24px;padding:12px 32px;font-size:16px}.btn{border:1px solid var(--border);background:var(--bg-input);color:var(--text-primary);cursor:pointer;-webkit-user-select:none;user-select:none;border-radius:8px;justify-content:center;align-items:center;padding:8px 20px;font-size:14px;font-weight:500;transition:all .15s;display:inline-flex}.btn:hover{background:var(--bg-hover)}.btn:disabled{opacity:.5;cursor:not-allowed}.btn-primary{background:var(--primary);color:#fff;border-color:var(--primary)}.btn-primary:hover{background:var(--primary-hover)}.btn-danger{color:var(--danger);border-color:var(--danger)}.btn-danger:hover{background:var(--danger-bg)}.btn-danger-outline{color:var(--danger);border-color:var(--danger);background:0 0}.btn-danger-outline:hover{background:var(--danger-bg)}.btn-small{padding:4px 12px;font-size:13px}.btn-nav{color:var(--text-secondary);background:0 0;border:none;padding:6px 16px;font-size:15px}.btn-nav:hover{color:var(--text-primary);background:0 0}.btn-nav.active{color:var(--primary);background:var(--nav-active-bg);font-weight:600}.btn-icon{border:1px solid var(--border);background:var(--bg-input);width:36px;height:36px;color:var(--text-secondary);cursor:pointer;-webkit-user-select:none;user-select:none;border-radius:50%;justify-content:center;align-items:center;padding:0;font-size:18px;transition:all .15s;display:inline-flex}.btn-icon:hover{background:var(--bg-hover);color:var(--text-primary)}.quiz{flex-direction:column;align-items:center;gap:24px;display:flex}.quiz-empty{text-align:center;color:var(--text-secondary);padding:48px 0}.quiz-start{text-align:center;padding:48px 0}.quiz-start h2{color:var(--text-primary);margin-bottom:8px;font-size:28px}.quiz-start 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h2{color:var(--text-primary);margin:0;font-size:20px;font-weight:600}.wm-add{gap:8px;display:flex}.wm-add input{border:1px solid var(--border);background:var(--bg-input);min-width:0;color:var(--text-primary);border-radius:8px;outline:none;flex:1;padding:10px 14px;font-size:14px;transition:border-color .15s}.wm-add input:focus{border-color:var(--primary);box-shadow:0 0 0 3px #4f46e51a}.wm-list{flex-direction:column;gap:6px;display:flex}.wm-empty{color:var(--text-muted);text-align:center;padding:24px}.wm-item{background:var(--bg-card);border-radius:10px;justify-content:space-between;align-items:center;gap:12px;padding:12px 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12px;font-size:15px;font-weight:600}.wm-sync-info{flex-wrap:wrap;justify-content:space-between;align-items:center;gap:12px;display:flex}.wm-sync-status{color:var(--text-primary);align-items:center;gap:8px;font-size:14px;display:flex}.sync-dot{background:var(--sync-dot);border-radius:50%;flex-shrink:0;width:8px;height:8px}.sync-spinner{border:2px solid var(--spinner-track);border-top-color:var(--spinner-fg);border-radius:50%;flex-shrink:0;width:14px;height:14px;animation:.6s linear infinite spin}@keyframes spin{to{transform:rotate(360deg)}}.wm-sync-desc{color:var(--text-secondary);margin:0;font-size:13px}.wm-sync-desc code{background:var(--bg-kbd);border-radius:3px;padding:1px 5px;font-size:12px}.app-footer{text-align:center;color:var(--text-muted);margin-top:auto;padding:24px 0 8px;font-size:13px}.app-footer a{color:var(--text-secondary);text-decoration:none}.app-footer a:hover{color:var(--primary);text-decoration:underline}.review-page{flex-direction:column;align-items:center;gap:16px;padding-top:16px;display:flex}.review-page h2{color:var(--text-primary);margin:0;font-size:20px;font-weight:600}.review-desc{color:var(--text-secondary);text-align:center;max-width:360px;margin:0;font-size:14px}.review-result{flex-direction:column;align-items:center;width:100%;display:flex}.review-count{color:var(--text-primary);margin:0 0 12px;font-size:14px;font-weight:600}.review-summary-cards{justify-content:center;gap:12px;display:flex}.review-card{color:#fff;cursor:pointer;background:linear-gradient(135deg,#4f46e5,#7c3aed);border-radius:12px;flex-direction:column;align-items:center;gap:4px;padding:20px 32px;transition:opacity 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8px;font-size:12px}.alpha-page{flex-direction:column;gap:16px;display:flex}.alpha-page h2{color:var(--text-primary);margin:0;font-size:20px;font-weight:600}.alpha-grid{grid-template-columns:repeat(7,1fr);gap:8px;display:grid}@media (width>=480px){.alpha-grid{grid-template-columns:repeat(9,1fr)}}.alpha-letter{border:1px solid var(--border);background:var(--bg-input);cursor:pointer;border-radius:8px;flex-direction:column;align-items:center;gap:2px;padding:10px 4px;transition:all .15s;display:flex}.alpha-letter:hover:not(:disabled){border-color:var(--primary);background:var(--bg-primary-light)}.alpha-letter-active{border-color:var(--primary);background:var(--primary);color:#fff}.alpha-letter-active .alpha-letter-count{color:#ffffffbf}.alpha-letter-empty{opacity:.3;cursor:not-allowed}.alpha-letter-char{font-size:18px;font-weight:700;line-height:1}.alpha-letter-count{color:var(--text-muted);font-size:11px;line-height:1}.alpha-result{flex-direction:column;display:flex}