:root{--bg-body:#000;--bg-card:#0a0a0a;--bg-card-solid:#0a0a0a;--bg-input:#121212;--bg-hover:#1a1a1a;--glass-border:#1f1f1f;--glass-shadow:none;--text-primary:#ededed;--text-secondary:#a1a1aa;--text-muted:#71717a;--text-accent:#fff;--accent:#fff;--accent-light:#e4e4e7;--accent-dark:#a1a1aa;--accent-glow:transparent;--accent-gradient:#fff;--success:#34d399;--danger:#f87171;--warning:#fbbf24;--border:#1f1f1f;--border-input:#27272a;--font:"Inter", system-ui, -apple-system, sans-serif;--radius-sm:6px;--radius:12px;--radius-lg:16px;--radius-xl:20px;--ease:cubic-bezier(.4, 0, .2, 1);--duration:.25s;--duration-slow:.5s}[data-theme=light]{--bg-body:#f9fafb;--bg-card:#fff;--bg-card-solid:#fff;--bg-input:#f3f4f6;--bg-hover:#e5e7eb;--glass-border:#e5e7eb;--glass-shadow:0 4px 6px -1px #0000000d, 0 2px 4px -1px #00000008;--text-primary:#111827;--text-secondary:#4b5563;--text-muted:#6b7280;--text-accent:#000;--accent:#111827;--accent-light:#374151;--accent-dark:#000;--accent-glow:transparent;--accent-gradient:#111827;--success:#10b981;--danger:#ef4444;--warning:#f59e0b;--border:#e5e7eb;--border-input:#d1d5db}*,:before,:after{box-sizing:border-box;margin:0;padding:0}html{-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;font-size:16px}body{font-family:var(--font);background:var(--bg-body);color:var(--text-primary);min-height:100vh;transition:background-color var(--duration) var(--ease), color var(--duration) var(--ease);line-height:1.6;overflow-x:hidden}img{max-width:100%;display:block}button{cursor:pointer;font-family:inherit}input{font-family:inherit}#app{flex-direction:column;max-width:1180px;min-height:100vh;margin:0 auto;padding:0 24px 60px;display:flex}#app-header{text-align:center;padding:40px 0 16px}.header-brand{justify-content:center;align-items:center;gap:12px;display:flex}.header-logo{width:36px;height:36px;color:var(--accent-light);filter:drop-shadow(0 0 8px var(--accent-glow))}#app-header h1{letter-spacing:-.5px;color:var(--text-primary);font-size:28px;font-weight:700}.header-tagline{color:var(--text-muted);margin-top:4px;font-size:14px}#stepper{padding:20px 0 8px}.stepper-list{justify-content:center;gap:0;list-style:none;display:flex;position:relative}.stepper-item{opacity:.4;transition:opacity var(--duration) var(--ease);flex-direction:column;flex:0 0 140px;align-items:center;gap:6px;display:flex;position:relative}.stepper-item.active,.stepper-item.completed{opacity:1}.stepper-item:not(:last-child):after{content:"";background:var(--border);width:calc(100% - 40px);height:2px;transition:background var(--duration) var(--ease);position:absolute;top:16px;left:calc(50% + 20px)}.stepper-item.completed:not(:last-child):after{background:var(--accent)}.stepper-number{border:2px solid var(--border);background:var(--bg-card-solid);width:32px;height:32px;color:var(--text-secondary);transition:all var(--duration) var(--ease);z-index:1;border-radius:50%;justify-content:center;align-items:center;font-size:14px;font-weight:600;display:flex;position:relative}.stepper-item.active .stepper-number{border-color:var(--accent);background:var(--accent);color:#fff;box-shadow:0 0 16px var(--accent-glow)}.stepper-item.completed .stepper-number{border-color:var(--success);background:var(--success);color:#fff}.stepper-label{color:var(--text-secondary);text-transform:uppercase;letter-spacing:.5px;font-size:12px;font-weight:500}.stepper-item.active .stepper-label{color:var(--text-primary)}.glass{background:var(--bg-card);border:1px solid var(--glass-border);border-radius:var(--radius-xl);box-shadow:var(--glass-shadow);transition:background-color var(--duration) var(--ease), border-color var(--duration) var(--ease), box-shadow var(--duration) var(--ease)}.step-panel{animation:fadeSlideIn var(--duration-slow) var(--ease);display:none}.step-panel.active{display:block}@keyframes fadeSlideIn{0%{opacity:0;transform:translateY(16px)}to{opacity:1;transform:translateY(0)}}.step-card{margin-top:12px;padding:36px}.step-title{letter-spacing:-.3px;margin-bottom:6px;font-size:24px;font-weight:600}.step-desc{color:var(--text-secondary);margin-bottom:28px;font-size:15px}.step-actions{justify-content:space-between;align-items:center;padding:20px 0;display:flex}.btn{border-radius:var(--radius);transition:all var(--duration) var(--ease);white-space:nowrap;border:none;justify-content:center;align-items:center;gap:8px;padding:10px 20px;font-size:14px;font-weight:500;display:inline-flex;position:relative;overflow:hidden}.btn svg{flex-shrink:0;width:18px;height:18px}.btn-primary{background:var(--accent);color:#111827;font-weight:600}[data-theme=light] .btn-primary{background:var(--accent);color:#fff}.btn-primary:hover{background:var(--accent-light);color:#111827;transform:translateY(-2px);box-shadow:0 4px 12px #0000001a}[data-theme=light] .btn-primary:hover{background:var(--accent-dark);color:#111827}.btn-primary:active{transform:scale(.97)}.btn-primary:disabled{opacity:.4;cursor:not-allowed;transform:none}.btn-accent{background:var(--accent);color:#fff;font-weight:600}[data-theme=light] .btn-accent{background:var(--accent);color:#111827}.btn-accent:hover{background:var(--accent-light);color:#fff;transform:translateY(-1px)}[data-theme=light] .btn-accent:hover{background:var(--accent-dark);color:#fff}.btn-ghost{color:var(--text-secondary);border:1px solid var(--border);background:0 0}.btn-ghost:hover{background:var(--bg-hover);color:var(--text-primary);border-color:var(--text-muted)}.btn-tool{background:var(--bg-input);color:var(--text-secondary);border:1px solid var(--border-input);border-radius:var(--radius-sm);padding:8px 14px;font-size:13px}.btn-tool:hover{background:var(--bg-hover);color:var(--text-primary);border-color:var(--accent)}.btn-tool.active{color:var(--accent-light);border-color:var(--accent);background:#7c3aed26}.btn-sm{border-radius:var(--radius-sm);padding:6px 12px;font-size:12px}.btn-lg{padding:12px 28px;font-size:15px}.btn-xl{border-radius:var(--radius-lg);padding:16px 40px;font-size:17px;font-weight:600}.btn-block{width:100%}.btn-row{flex-wrap:wrap;gap:8px;display:flex}.drop-zone{border:2px dashed var(--border);border-radius:var(--radius-lg);cursor:pointer;transition:all var(--duration) var(--ease);background:var(--bg-input);flex-direction:column;align-items:center;gap:12px;padding:48px 24px;display:flex}.drop-zone:hover,.drop-zone:focus-visible{border-color:var(--accent);background:#7c3aed0f}.drop-zone.drag-over{border-color:var(--accent-light);box-shadow:0 0 30px var(--accent-glow);background:#7c3aed1f;transform:scale(1.01)}.drop-icon{width:48px;height:48px;color:var(--text-muted);transition:color var(--duration) var(--ease)}.drop-zone:hover .drop-icon,.drop-zone.drag-over .drop-icon{color:var(--accent-light)}.drop-text{color:var(--text-secondary);font-size:18px;font-weight:500}.drop-subtext{color:var(--text-muted);font-size:13px}.upload-preview{background:var(--bg-input);border-radius:var(--radius);border:1px solid var(--border);align-items:center;gap:16px;margin-top:16px;padding:16px;display:flex}.upload-preview.hidden{display:none}.upload-preview img{object-fit:cover;border-radius:var(--radius-sm);border:1px solid var(--border);width:64px;height:64px}.preview-info{flex-direction:column;flex:1;gap:2px;display:flex}.preview-info span:first-child{color:var(--text-primary);font-size:14px;font-weight:500}.preview-info span:last-child{color:var(--text-muted);font-size:12px}.error-msg{color:var(--danger);min-height:0;max-height:0;transition:all var(--duration) var(--ease);margin-top:0;font-size:13px;overflow:hidden}.error-msg.visible{max-height:40px;margin-top:12px}.editor-layout{grid-template-columns:1fr 280px;align-items:start;gap:28px;display:grid}.editor-canvas-wrap{border-radius:var(--radius);border:1px solid var(--border);background:#1a1b26;justify-content:center;align-items:center;min-height:340px;padding:2px;display:flex;overflow:hidden}#editor-canvas{border-radius:var(--radius-sm);max-width:100%;display:block}.editor-controls{flex-direction:column;gap:20px;display:flex}.control-group{flex-direction:column;gap:8px;display:flex}.control-label{text-transform:uppercase;letter-spacing:.6px;color:var(--text-muted);justify-content:space-between;align-items:center;font-size:12px;font-weight:600;display:flex}.control-value{color:var(--accent-light);font-variant-numeric:tabular-nums;font-size:13px;font-weight:500}.slider{appearance:none;cursor:pointer;background:#ffffff1a;border-radius:3px;outline:none;width:100%;height:6px}.slider::-webkit-slider-thumb{appearance:none;background:var(--accent-gradient);width:18px;height:18px;box-shadow:0 2px 8px var(--accent-glow);cursor:pointer;transition:transform .15s var(--ease);border:2px solid #fff;border-radius:50%}.slider::-webkit-slider-thumb:hover{transform:scale(1.2)}.slider::-moz-range-thumb{background:var(--accent);width:18px;height:18px;box-shadow:0 2px 8px var(--accent-glow);cursor:pointer;border:2px solid #fff;border-radius:50%}.progress-wrap{flex-direction:column;gap:6px;display:flex}.progress-wrap.hidden{display:none}.progress-bar{background:var(--border);border-radius:3px;height:6px;overflow:hidden}.progress-fill{background:var(--accent-gradient);width:0%;height:100%;transition:width .3s var(--ease);border-radius:3px;position:relative;overflow:hidden}.progress-fill:after{content:"";background:linear-gradient(90deg,#0000,#fff6,#0000);animation:1.5s infinite shimmer;position:absolute;inset:0}@keyframes shimmer{0%{transform:translate(-100%)}to{transform:translate(100%)}}.progress-text{color:var(--text-muted);font-size:12px}.bg-color-section{background:var(--bg-input);border-radius:var(--radius);border:1px solid var(--border);flex-direction:column;gap:10px;margin-top:4px;padding:12px;display:flex}.bg-color-section.hidden{display:none}.bg-color-title{text-transform:uppercase;letter-spacing:.5px;color:var(--text-muted);margin:0;font-size:12px;font-weight:600}.bg-swatch-grid{grid-template-columns:repeat(5,1fr);gap:8px;display:grid}.bg-swatch{border:2px solid var(--border);cursor:pointer;width:36px;height:36px;transition:all var(--duration) var(--ease);border-radius:50%;outline:none;justify-content:center;align-items:center;padding:0;display:flex;position:relative}.bg-swatch:hover{border-color:var(--text-muted);box-shadow:var(--glass-shadow);transform:scale(1.15)}.bg-swatch.active{border-color:var(--accent);transform:scale(1.1);box-shadow:0 0 0 3px #7c3aed4d,0 2px 8px #0000004d}.bg-swatch-transparent{background-color:#666;background-image:linear-gradient(45deg,#444 25%,#0000 25%),linear-gradient(-45deg,#444 25%,#0000 25%),linear-gradient(45deg,#0000 75%,#444 75%),linear-gradient(-45deg,#0000 75%,#444 75%);background-position:0 0,0 4px,4px -4px,-4px 0;background-repeat:repeat,repeat,repeat,repeat;background-size:8px 8px;background-attachment:scroll,scroll,scroll,scroll;background-origin:padding-box,padding-box,padding-box,padding-box;background-clip:border-box,border-box,border-box,border-box}.bg-swatch-transparent svg{width:16px;height:16px;color:var(--danger);filter:drop-shadow(0 1px 2px #00000080)}.bg-custom-row{border-top:1px solid var(--border);align-items:center;gap:8px;padding-top:4px;display:flex}.bg-custom-row label{color:var(--text-muted);white-space:nowrap;font-size:12px}#bg-color-picker{border:2px solid var(--border);border-radius:var(--radius-sm);cursor:pointer;background:0 0;flex-shrink:0;width:32px;height:32px;padding:0}#bg-color-picker:hover{border-color:var(--accent)}.layout-split{grid-template-columns:320px 1fr;align-items:start;gap:28px;display:grid}.layout-options{flex-direction:column;gap:16px;display:flex}.preset-grid{grid-template-columns:1fr 1fr;gap:8px;display:grid}.preset-card{background:var(--bg-input);border:1px solid var(--border-input);border-radius:var(--radius);text-align:left;cursor:pointer;transition:all var(--duration) var(--ease);flex-direction:column;gap:2px;padding:12px;display:flex}.preset-card:hover{background:var(--bg-hover);border-color:var(--text-muted);box-shadow:var(--glass-shadow);transform:translateY(-2px)}.preset-card.active{border-color:var(--accent);background:#7c3aed1f;box-shadow:0 0 12px #7c3aed33}.preset-name{color:var(--text-primary);font-size:13px;font-weight:600}.preset-dims{color:var(--accent-light);font-variant-numeric:tabular-nums;font-size:12px;font-weight:500}.preset-desc{color:var(--text-muted);margin-top:2px;font-size:11px}.custom-fields.hidden{display:none}.custom-fields{background:var(--bg-input);border-radius:var(--radius);border:1px solid var(--border);flex-direction:column;gap:10px;padding:12px;display:flex}.field-row{justify-content:space-between;align-items:center;gap:12px;display:flex}.field-row label{color:var(--text-secondary);white-space:nowrap;font-size:13px}.input-field{background:var(--bg-input);border:1px solid var(--border-input);border-radius:var(--radius-sm);color:var(--text-primary);width:90px;transition:border-color var(--duration) var(--ease);outline:none;padding:8px 12px;font-size:14px}select.input-field option{background:var(--bg-body);color:var(--text-primary)}.input-field:focus{border-color:var(--accent);box-shadow:0 0 0 3px #7c3aed26}.input-sm{width:72px;padding:6px 10px;font-size:13px}.divider{border:none;border-top:1px solid var(--border);margin:4px 0}.layout-preview-wrap{flex-direction:column;gap:12px;display:flex}.a4-preview-container{border-radius:var(--radius);border:1px solid var(--border);background:#1a1b26;justify-content:center;align-items:center;padding:20px;display:flex}#layout-canvas{border-radius:4px;max-width:100%;display:block;box-shadow:0 4px 20px #0006}.layout-info-text{color:var(--text-muted);text-align:center;font-size:13px}.download-hero{flex-direction:column;align-items:center;gap:24px;padding:24px 0 8px;display:flex}.download-icon-wrap{background:var(--accent);border-radius:50%;justify-content:center;align-items:center;width:80px;height:80px;display:flex}.download-icon{color:#000;width:36px;height:36px}.download-summary{text-align:center;flex-direction:column;gap:6px;display:flex}.download-summary .summary-line{color:var(--text-secondary);font-size:14px}.download-summary .summary-line strong{color:var(--text-primary)}.download-note{color:var(--text-muted);text-align:center;max-width:380px;font-size:12px;line-height:1.5}.ai-enhance-btn{background:linear-gradient(135deg,#f59e0b 0%,#ef4444 50%,#ec4899 100%);border:none;position:relative;overflow:hidden}.ai-enhance-btn:before{content:"";background:conic-gradient(#0000,#ffffff26,#0000 30%);width:200%;height:200%;animation:3s linear infinite enhanceShimmer;position:absolute;top:-50%;left:-50%}@keyframes enhanceShimmer{to{transform:rotate(360deg)}}.ai-enhance-btn:hover{transform:translateY(-1px);box-shadow:0 6px 24px #f59e0b66}.ai-enhance-btn.active{background:linear-gradient(135deg, var(--success) 0%, #059669 100%);box-shadow:0 4px 14px #34d3994d}.ai-enhance-btn.active:before{animation:none}.ai-enhance-btn:disabled:not(.active){opacity:.7}.enhance-hint{color:var(--text-muted);text-align:center;letter-spacing:.3px;font-size:11px}@keyframes spinStar{to{transform:rotate(360deg)}}.spin-icon{animation:1s linear infinite spinStar}#app-footer{text-align:center;color:var(--text-muted);border-top:1px solid var(--border);margin-top:auto;padding:32px 0 16px;font-size:13px}.hidden{display:none!important}@media (width<=900px){#app{padding:0 16px 40px}.step-card{padding:24px 20px}.editor-layout{grid-template-columns:1fr}.editor-controls{flex-flow:wrap;gap:12px}.editor-controls .control-group{flex:200px;min-width:200px}.layout-split{grid-template-columns:1fr}.preset-grid{grid-template-columns:1fr 1fr 1fr}.stepper-item{flex:none}.stepper-label{font-size:10px}}@media (width<=600px){#app-header h1{font-size:22px}.stepper-label{display:none}.stepper-item{flex:0 0 60px}.preset-grid{grid-template-columns:1fr 1fr}.step-title{font-size:20px}.btn-lg{padding:10px 20px;font-size:14px}.btn-xl{padding:14px 28px;font-size:15px}}