:root{--primary:#4f46e5;--primary-hover:#4338ca;--secondary:#f3f4f6;--secondary-hover:#e5e7eb;--text:#111827;--text-light:#6b7280;--border:#e5e7eb;--bg-light:#f9fafb;--error:#ef4444;--success:#10b981;--card-shadow:0 4px 6px rgba(0,0,0,0.05);--transition:all .3s cubic-bezier(0.25,0.8,0.25,1)}*{box-sizing:border-box;margin:0;padding:0;font-family:-apple-system,BlinkMacSystemFont,'Segoe UI',Roboto,Oxygen,Ubuntu,Cantarell,sans-serif}.containert{max-width:1200px;margin:100px auto;padding:0 20px}.header-t{text-align:center;margin-bottom:40px}.header-t h1{font-size:2.5rem;line-height:1.6;color:var(--primary);margin-bottom:10px;font-family:"Noto Sans",sans-serif;text-align:center}.header-t p{color:var(--text-light);font-size:1.1rem;font-family:"Noto 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auto}}@media(max-width:768px){.containert{margin:60px auto;padding:0 15px}.header-t h1{font-size:1.8rem}.header-t p{font-size:1rem;max-width:95%}.card-body{padding:20px}.controls{flex-direction:column}.control-group{min-width:auto}#htmlEditor,#pdfPreview{height:350px}.btn{width:100%;justify-content:center}}@media(max-width:480px){.header-t h1{font-size:1.5rem}.card-body{padding:15px}#htmlEditor,#pdfPreview{height:280px}}@media(prefers-color-scheme:dark){:root{--primary:#6366f1;--secondary:#374151;--text:#f9fafb;--text-light:#9ca3af;--border:#4b5563;--bg-light:#1f2937}body{background-color:#111827}.card{background:#1f2937}.controls{background:#1f2937;border-color:#4b5563}#htmlEditor{background:#1f2937;color:#f9fafb;border-color:#4b5563}#pdfPreview{background:#1f2937}.step-card{background:#1f2937;border-color:#374151}.step-card h3{color:#f9fafb}.step-card p{color:#9ca3af}.content-wrapper{background:#1f2937;border-color:#374151}.content-wrapper h2{color:#818cf8}.content-wrapper p,.content-wrapper li{color:#e5e7eb}}@media print{.controls,.action-buttons,.how-to-section-wrapper,.content-wrapper,.toast{display:none !important}.editor-container{display:block !important}.editor-column:first-child{display:none}.containert{margin:0;padding:0}}.btn:focus-visible,.control-input:focus-visible,.control-select:focus-visible,#htmlEditor:focus-visible{outline:2px solid var(--primary);outline-offset:2px}