:root{--bg:#f7f5f2;--surface:#fff;--border:#e5e1da;--text:#1a1a1a;--text-muted:#6b6b6b;--accent:#b8452f;--accent-hover:#9c3a27;--hsk1:#2f7d4f;--hsk2:#4a8f5f;--hsk3:#b8860b;--hsk4:#c17817;--hsk5:#c1521a;--hsk6:#b8452f;--hsk7:#8b3a3a;--fuera:#8a8a8a;--disabled-bg:#c9c2b8;--radius:14px;font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica,Arial,sans-serif}[data-theme=dark]{--bg:#16161a;--surface:#212126;--border:#38383f;--text:#f0efec;--text-muted:#a8a6ab;--accent:#e2694e;--accent-hover:#ec8267;--hsk1:#4a9d6c;--hsk2:#63b381;--hsk3:#d1a12e;--hsk4:#dd9540;--hsk5:#dd7442;--hsk6:#e2694e;--hsk7:#c15b5b;--fuera:#8a8a90;--disabled-bg:#45454c}*{box-sizing:border-box}body{background:var(--bg);color:var(--text);-webkit-font-smoothing:antialiased;margin:0;transition:background .15s,color .15s}#app{max-width:720px;margin:0 auto;padding:20px 16px 60px}.topbar{justify-content:space-between;align-items:center;gap:10px;padding-top:4px;display:flex}.about-link{color:var(--text-muted);border-bottom:1px dotted var(--text-muted);font-size:13px;text-decoration:none}.about-link:hover{color:var(--accent);border-color:var(--accent)}.topbar-toggles{flex-shrink:0;align-items:center;gap:8px;display:flex}.icon-toggle{background:var(--surface);border:1px solid var(--border);color:var(--text);cursor:pointer;border-radius:50%;justify-content:center;align-items:center;width:30px;height:30px;padding:0;font-size:15px;line-height:1;display:flex}.icon-toggle:hover{border-color:var(--accent);color:var(--accent)}.lang-toggle{background:var(--surface);border:1px solid var(--border);color:var(--text);cursor:pointer;letter-spacing:.02em;border-radius:20px;padding:6px 12px;font-size:12px;font-weight:600}.lang-toggle:hover{border-color:var(--accent);color:var(--accent)}header{text-align:center;padding:20px 0 16px}header h1{letter-spacing:-.01em;margin:0 0 6px;font-size:22px}header p{color:var(--text-muted);margin:0;font-size:14px;line-height:1.5}textarea{border:1px solid var(--border);border-radius:var(--radius);resize:vertical;background:var(--surface);width:100%;min-height:160px;color:var(--text);padding:14px;font-family:inherit;font-size:16px;line-height:1.6}textarea:focus{border-color:var(--accent);outline:none}textarea::placeholder{color:var(--text-muted);opacity:1}.options{flex-wrap:wrap;gap:10px;margin:14px 0;display:flex}.options label{color:var(--text-muted);margin-bottom:4px;font-size:13px;display:block}.field-group{flex:1;min-width:140px}select,input[type=text]{border:1px solid var(--border);background:var(--surface);width:100%;color:var(--text);border-radius:10px;padding:10px 12px;font-family:inherit;font-size:15px}.hsk-checks{flex-wrap:wrap;gap:8px;margin-top:6px;display:flex}.hsk-checks label{color:var(--text);background:var(--surface);border:1px solid var(--border);cursor:pointer;-webkit-user-select:none;user-select:none;border-radius:20px;align-items:center;gap:5px;margin:0;padding:6px 10px;font-size:13px;display:inline-flex}.hsk-checks input{margin:0}button.primary{border-radius:var(--radius);background:var(--accent);color:#fff;cursor:pointer;border:none;width:100%;margin-top:6px;padding:15px;font-size:16px;font-weight:600;transition:background .15s}button.primary:hover{background:var(--accent-hover)}button.primary:disabled{background:var(--disabled-bg);cursor:not-allowed}.stroke-toggle{color:var(--text-muted);cursor:pointer;-webkit-user-select:none;user-select:none;align-items:center;gap:8px;margin:4px 0 14px;font-size:13px;display:flex}.stroke-toggle input{flex-shrink:0;margin:0}.progress-bar{background:var(--border);border-radius:3px;width:100%;height:6px;margin-top:10px;overflow:hidden}.progress-fill{background:var(--accent);width:0%;height:100%;transition:width .15s}.lesson-block{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);margin-bottom:10px;padding:12px}.lesson-block-header{align-items:center;gap:8px;margin-bottom:8px;display:flex}.lesson-name-input{border:1px solid var(--border);background:var(--bg);color:var(--text);border-radius:8px;flex:1;padding:8px 10px;font-family:inherit;font-size:14px;font-weight:600}.lesson-remove-btn{color:var(--text-muted);cursor:pointer;background:0 0;border:none;flex-shrink:0;padding:6px 8px;font-size:12px;text-decoration:underline}.lesson-remove-btn:hover{color:var(--accent)}.lesson-block textarea{min-height:100px}button.secondary{border:1px dashed var(--border);border-radius:var(--radius);width:100%;color:var(--text-muted);cursor:pointer;background:0 0;margin:4px 0 14px;padding:11px;font-size:14px;font-weight:600}button.secondary:hover{border-color:var(--accent);color:var(--accent)}.status{text-align:center;color:var(--text-muted);min-height:20px;margin-top:12px;font-size:14px}.status.error{color:var(--accent)}.summary{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);margin-top:18px;padding:16px}.summary h2{margin:0 0 10px;font-size:15px}.summary-stats{color:var(--text-muted);flex-wrap:wrap;gap:14px;margin-bottom:12px;font-size:13px;display:flex}.summary-stats b{color:var(--text);font-size:16px;display:block}.vocab-list{border-top:1px solid var(--border);max-height:340px;overflow-y:auto}.vocab-row{border-bottom:1px solid var(--border);align-items:baseline;gap:10px;padding:9px 0;font-size:14px;display:flex}.vocab-row .w{min-width:58px;font-size:17px;font-weight:500}.vocab-row .py{color:var(--text-muted);min-width:70px;font-size:13px}.vocab-row .mean{color:var(--text);flex:1;font-size:13px}.vocab-row .badge{color:#fff;white-space:nowrap;border-radius:10px;padding:2px 8px;font-size:11px}.lesson-summary-header{color:var(--text-muted);border-bottom:1px solid var(--border);padding:12px 0 6px;font-size:13px;font-weight:600}.lesson-summary-header:first-child{padding-top:0}footer{text-align:center;color:var(--text-muted);margin-top:30px;font-size:12px;line-height:1.6}footer a{color:var(--accent)}.about-content{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);margin-top:18px;padding:20px;font-size:15px;line-height:1.6}.about-content h2{margin:22px 0 8px;font-size:17px}.about-content h2:first-child{margin-top:0}.about-content p{color:var(--text);margin:0 0 10px}.about-content a{color:var(--accent)}.about-content ul{color:var(--text);margin:0 0 10px;padding-left:20px}.about-content ul li{margin-bottom:6px;line-height:1.5}.download-grid{grid-template-columns:repeat(auto-fit,minmax(140px,1fr));gap:10px;margin-top:12px;display:grid}.download-btn{border:1px solid var(--border);background:var(--bg);color:var(--text);text-align:center;border-radius:12px;flex-direction:column;align-items:center;gap:4px;padding:14px 10px;font-size:13px;font-weight:600;text-decoration:none;transition:border-color .15s,color .15s;display:flex}.download-btn:hover{border-color:var(--accent);color:var(--accent)}.download-btn span.platform-sub{color:var(--text-muted);font-size:11px;font-weight:400}.back-link{color:var(--text-muted);border-bottom:1px dotted var(--text-muted);margin-top:20px;font-size:13px;text-decoration:none;display:inline-block}.back-link:hover{color:var(--accent);border-color:var(--accent)}