:root{--primary-gradient: linear-gradient(135deg, #6366f1 0%, #8b5cf6 100%);--primary-color: #6366f1;--secondary-color: #f1f5f9;--success-color: #10b981;--danger-color: #ef4444;--text-main: #1e293b;--text-secondary: #64748b;--border-color: #e2e8f0;--surface-color: #ffffff;--bg-color: #f8fafc;--shadow-sm: 0 1px 2px 0 rgb(0 0 0 / .05);--shadow-md: 0 4px 6px -1px rgb(0 0 0 / .1);--radius: 8px;--header-height: 64px}*{box-sizing:border-box;margin:0;padding:0;outline:none}body{font-family:Outfit,-apple-system,sans-serif;background-color:var(--bg-color);color:var(--text-main);height:100vh;overflow:hidden;display:flex;flex-direction:column}.navbar{height:var(--header-height);background:var(--surface-color);border-bottom:1px solid var(--border-color);display:flex;align-items:center;justify-content:space-between;padding:0 24px;box-shadow:var(--shadow-sm);z-index:50;flex-shrink:0}.branding{display:flex;align-items:center;gap:12px}.logo-text{font-size:1.25rem;font-weight:700;color:var(--text-main);letter-spacing:-.5px}.logo-icon{font-size:28px;color:#fff;background:var(--primary-gradient);padding:6px;border-radius:8px}.top-nav-controls{display:flex;align-items:center;gap:16px;background:transparent;border:none;padding:0;margin:0 24px;flex:1;justify-content:center}.page-nav-compact{display:flex;align-items:center;background:#fff;border:1px solid var(--border-color);border-radius:20px;padding:2px}.page-number-display{font-size:.85rem;font-variant-numeric:tabular-nums;color:var(--text-main);padding:0 8px;min-width:44px;text-align:center;font-weight:600}.user-profile{display:flex;align-items:center;gap:16px}.user-badge{display:flex;align-items:center;gap:6px;font-weight:500;color:var(--text-main)}.main-layout{display:flex;flex:1;overflow:hidden;height:calc(100vh - var(--header-height))}.left-panel{width:240px;background:var(--surface-color);border-right:1px solid var(--border-color);overflow-y:auto;padding:20px;display:none;flex-direction:column;gap:16px;flex-shrink:0;min-width:240px}.thumbnail-item{cursor:pointer;border:2px solid transparent;border-radius:var(--radius);overflow:hidden;position:relative;background:#fff;box-shadow:var(--shadow-sm);transition:all .2s}.thumbnail-item:hover{transform:translateY(-2px);box-shadow:var(--shadow-md)}.thumbnail-item.active{border-color:var(--primary-color);box-shadow:0 0 0 2px #6366f133}.thumbnail-item canvas{width:100%;display:block}.page-number{position:absolute;bottom:6px;right:6px;background:#0009;color:#fff;padding:2px 8px;border-radius:12px;font-size:11px}.center-panel{flex:1;position:relative;background-color:#f1f5f9;background-image:radial-gradient(#cbd5e1 1px,transparent 1px);background-size:24px 24px;display:flex;flex-direction:column;align-items:center;justify-content:center;padding:20px;overflow:hidden}.right-panel{width:320px;background:var(--surface-color);border-left:1px solid var(--border-color);padding:16px;display:flex;flex-direction:column;gap:16px;overflow-y:auto;flex-shrink:0}.panel-section{display:flex;flex-direction:column;gap:8px}.panel-section h3{font-size:.95rem;font-weight:600;color:var(--text-main);display:flex;align-items:center;gap:8px;margin-bottom:4px}.panel-divider{height:1px;background-color:var(--border-color);margin:12px 0;flex-shrink:0}.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:10px 16px;border-radius:var(--radius);border:1px solid transparent;font-weight:500;cursor:pointer;transition:all .2s;font-family:inherit;font-size:.95rem}.btn:disabled{opacity:.5;cursor:not-allowed;filter:grayscale(1);background:#e2e8f0!important;color:#94a3b8!important;box-shadow:none!important;border-color:transparent!important}.btn:active:not(:disabled){transform:scale(.98)}.btn.primary{background:var(--primary-gradient);color:#fff;box-shadow:0 4px 12px #6366f140}.btn.primary:hover:not(:disabled){filter:brightness(1.1)}.btn.secondary{background:#fff;border:1px solid var(--border-color);color:var(--text-main)}.btn.secondary:hover:not(:disabled){border-color:var(--primary-color);color:var(--primary-color);background:#f8fafc}.btn.danger-outline{background:transparent;border:1px solid #fecaca;color:var(--danger-color)}.btn.danger-outline:hover:not(:disabled){background:#fef2f2;border-color:var(--danger-color)}.btn.success{background:linear-gradient(135deg,#10b981,#059669);color:#fff;box-shadow:0 4px 12px #10b98140}.btn.success.large{padding:14px 20px;font-size:1.05rem;font-weight:600}.btn.icon,.btn.icon-only{background:transparent;color:var(--text-secondary)}.btn.icon:hover:not(:disabled),.btn.icon-only:hover:not(:disabled){background:#f1f5f9;color:var(--text-main)}.btn.icon{padding:8px;border-radius:50%}.btn.icon-only{padding:4px;width:24px;height:24px;border-radius:50%;display:flex;align-items:center;justify-content:center}.btn.icon-only .material-icons{font-size:18px}.large-btn{margin-top:24px;padding:12px 32px;font-size:1.1rem;border-radius:24px}.shadow-btn{box-shadow:0 4px 6px -1px #10b98166,0 2px 4px -1px #10b98133;transition:all .2s}.shadow-btn:hover:not(:disabled){transform:translateY(-2px)}.btn-group{display:flex;gap:8px}.btn-group .btn{flex:1;font-size:.85rem;padding:8px}.control-card,.guide-steps,.tools-grid,.application-group{background-color:#f8fafc;border:1px solid var(--border-color);border-radius:8px;padding:12px;display:flex;flex-direction:column;gap:12px}.application-group{background:#fff}.control-row{display:flex;align-items:center;justify-content:space-between}.control-row .label{font-size:.9rem;color:var(--text-secondary);font-weight:500}.step-item{display:flex;gap:12px}.step-num{width:24px;height:24px;background-color:#e0e7ff;color:var(--primary-color);border-radius:50%;display:flex;align-items:center;justify-content:center;font-size:.8rem;font-weight:700;flex-shrink:0;margin-top:2px}.step-text strong{display:block;font-size:.95rem;color:var(--text-main);margin-bottom:4px}.step-text p{font-size:.85rem;color:var(--text-secondary);line-height:1.4;margin:0}.sub-label{display:block;font-size:.75rem;font-weight:600;color:var(--text-secondary);margin-bottom:6px;letter-spacing:.5px}.helper-text{font-size:.7rem;color:var(--text-secondary);margin-top:4px;margin-bottom:0;opacity:.8}.drag-overlay{position:absolute;inset:0;background:#6366f10d;-webkit-backdrop-filter:blur(4px);backdrop-filter:blur(4px);z-index:1000;display:flex;flex-direction:column;align-items:center;justify-content:center;color:var(--primary-color);border:4px dashed var(--primary-color);margin:16px;border-radius:12px}.drag-overlay.hidden{display:none}.drag-overlay .material-icons{font-size:64px;margin-bottom:16px}.drag-overlay p{font-size:1.5rem;font-weight:600}.empty-state{display:flex;flex-direction:column;align-items:center;justify-content:center;width:100%;max-width:600px;min-height:300px;color:var(--text-secondary);border:3px dashed #cbd5e1;border-radius:12px;background:#f8fafc;padding:32px;text-align:center;margin:auto}.empty-state .material-icons{font-size:64px;color:#cbd5e1;margin-bottom:16px}.empty-state h3{margin-top:16px;font-weight:600;font-size:1.25rem;color:var(--text-main)}.split-line{position:absolute;top:0;bottom:0;width:2px;z-index:20;cursor:col-resize;transform:translate(-50%);touch-action:none}.split-line:before{content:"";position:absolute;inset:0 -15px;background:transparent}.split-line.split{background-color:#ef4444;box-shadow:0 0 8px #ef444466;z-index:101}.split-line.seal{background-color:transparent;border-left:2px dashed #64748b}.split-line:after{content:"↔";position:absolute;top:50%;left:50%;transform:translate(-50%,-50%);background-color:#fff;color:inherit;font-family:monospace;font-weight:700;font-size:16px;padding:6px 10px;border-radius:20px;border:2px solid currentColor;box-shadow:0 2px 6px #00000026;display:flex;align-items:center;justify-content:center;line-height:1;white-space:nowrap}.split-line.split:after{color:#ef4444}.split-line.seal:after{color:#64748b;border-style:dashed}.split-line.dragging:after{transform:translate(-50%,-50%) scale(1.1);box-shadow:0 4px 12px #00000040;cursor:grabbing}@media(max-width:768px){body{height:100%;overflow:auto}.main-layout{flex-direction:column;height:auto;overflow:visible}.navbar{height:auto;flex-wrap:wrap;padding:12px;gap:12px}.branding .logo-text{font-size:1.1rem}.user-profile{display:none}.top-nav-controls{order:3;width:100%;margin:0;justify-content:space-between;background:#f8fafc;border:1px solid var(--border-color);border-radius:8px;padding:8px}.left-panel{width:100%;min-width:0;height:120px;flex-direction:row;overflow-x:auto;overflow-y:hidden;border-right:none;border-bottom:1px solid var(--border-color);padding:10px}.thumbnail-item{min-width:80px;width:80px;display:flex;flex-direction:column}.center-panel{min-height:50vh;padding:10px}.right-panel{width:100%;border-left:none;border-top:1px solid var(--border-color);height:auto;overflow-y:visible;padding-bottom:80px}.tools-grid{display:grid;grid-template-columns:1fr;gap:12px}.footer-actions{position:sticky;bottom:0;background:#fff;padding:12px;border-top:1px solid var(--border-color);z-index:100;margin:16px -16px -16px;width:calc(100% + 32px)}}.custom-scrollbar::-webkit-scrollbar{width:6px}.custom-scrollbar::-webkit-scrollbar-track{background:transparent}.custom-scrollbar::-webkit-scrollbar-thumb{background:#cbd5e1;border-radius:3px}.spacer{height:10px;flex:0}.v-divider{width:1px;height:20px;background-color:var(--border-color);margin:0 4px}