.mind-map-container{width:100%;max-width:1400px;margin:0 auto;padding:1px;display:flex;flex-direction:column}.top-menu{display:flex;flex-direction:column;padding:8px 12px;background:#fff;gap:8px;box-shadow:0 1px 3px rgba(0,0,0,0.08);position:relative;z-index:100;border-radius:8px;margin-bottom:12px;border:1px solid #e5e7eb}body.dark .top-menu{background:#1f2937;border:1px solid #374151;box-shadow:0 1px 3px rgba(0,0,0,0.3)}.menu-row{display:flex;justify-content:space-between;align-items:center;gap:10px}.menu-row-first{}.menu-row-second,.menu-row-third{margin-top:-4px}.menu-section{display:flex;align-items:center;gap:6px}.menu-section-left{flex:0 0 auto}.menu-section-center{flex:0 0 auto}.menu-section-right{flex:0 0 auto;margin-left:auto}.menu-divider{width:1px;height:18px;background:#e5e7eb;margin:0 6px}body.dark .menu-divider{background:#4b5563}.menu-group{display:flex;gap:4px;align-items:center;padding:0;border-radius:0;transition:all 0.2s ease;background:transparent;border:none;box-shadow:none}.menu-group:hover{background:transparent}.group-label{font-size:11.5px;font-weight:600;color:#6b7280;text-transform:uppercase;letter-spacing:0.5px;margin-right:6px}body.dark .group-label{color:#9ca3af}.menu-btn{padding:5px 10px;background:#f9fafb;border:1px solid #e5e7eb;border-radius:6px;cursor:pointer;font-size:13px;font-weight:500;color:#374151;transition:all 0.2s ease;white-space:nowrap;box-shadow:none}.menu-btn:hover{background:#f3f4f6;border-color:#d1d5db;transform:translateY(-1px);box-shadow:0 2px 4px rgba(0,0,0,0.05)}.menu-btn:active{transform:translateY(0)}body.dark .menu-btn{background:#374151;color:#e5e7eb;border-color:#4b5563}body.dark .menu-btn:hover{background:#4b5563;border-color:#6b7280;box-shadow:0 2px 4px rgba(0,0,0,0.3)}.menu-btn.primary{background:#6366f1;color:#fff;font-weight:600;border-color:#6366f1}.menu-btn.primary:hover{background:#4f46e5;border-color:#4f46e5}body.dark .menu-btn.primary{background:#6366f1;border-color:#6366f1}body.dark .menu-btn.primary:hover{background:#4f46e5;border-color:#4f46e5}.menu-btn.secondary{background:#fff;color:#6366f1;border:1px solid #e5e7eb}.menu-btn.secondary:hover{background:#eef2ff;border-color:#c7d2fe;color:#4f46e5}body.dark .menu-btn.secondary{background:#4b5563;border-color:#6b7280;color:#a5b4fc}body.dark .menu-btn.secondary:hover{background:#6b7280;border-color:#9ca3af;color:#c7d2fe}.menu-btn.tertiary{background:transparent;color:#6b7280;border:1px solid #e5e7eb}.menu-btn.tertiary:hover{background:#f9fafb;border-color:#d1d5db;color:#374151}body.dark .menu-btn.tertiary{background:transparent;border-color:#4b5563;color:#9ca3af}body.dark .menu-btn.tertiary:hover{background:#374151;border-color:#6b7280;color:#d1d5db}.menu-btn.success{background:#10b981;color:white;font-weight:600;border-color:#10b981}.menu-btn.success:hover{background:#059669;border-color:#059669}body.dark .menu-btn.success{background:#10b981;border-color:#10b981}body.dark .menu-btn.success:hover{background:#059669;border-color:#059669}.menu-btn.danger{background:#ef4444;color:white;font-weight:600;border-color:#ef4444}.menu-btn.danger:hover{background:#dc2626;border-color:#dc2626}body.dark .menu-btn.danger{background:#ef4444;border-color:#ef4444}body.dark .menu-btn.danger:hover{background:#dc2626;border-color:#dc2626}.menu-btn.ai-primary{background:#3b82f6;color:white;font-weight:600;border-color:#3b82f6}.menu-btn.ai-primary:hover{background:#2563eb;border-color:#2563eb}body.dark .menu-btn.ai-primary{background:#3b82f6;border-color:#3b82f6}body.dark .menu-btn.ai-primary:hover{background:#2563eb;border-color:#2563eb}.menu-btn.ai-secondary{background:#eff6ff;color:#3b82f6;border:1px solid #dbeafe}.menu-btn.ai-secondary:hover{background:#dbeafe;border-color:#bfdbfe;color:#2563eb}body.dark .menu-btn.ai-secondary{background:#1e3a8a;border-color:#1e40af;color:#93c5fd}body.dark .menu-btn.ai-secondary:hover{background:#1e40af;border-color:#2563eb;color:#bfdbfe}.menu-btn:disabled{opacity:0.5;cursor:not-allowed;transform:none !important}.menu-btn.small{padding:4px 8px;height:26px;line-height:18px;font-size:12.5px;display:inline-flex;align-items:center;justify-content:center;gap:4px}.menu-btn.zoom-btn{padding:0;width:28px;height:28px;font-size:16px;background:#10b981;color:white;font-weight:700;border-radius:6px;border-color:#10b981}.menu-btn.zoom-btn:hover{background:#059669;border-color:#059669;transform:translateY(-1px)}body.dark .menu-btn.zoom-btn{background:#10b981;border-color:#10b981}body.dark .menu-btn.zoom-btn:hover{background:#059669;border-color:#059669}.menu-group.zoom-group{gap:4px}body.dark .menu-group.zoom-group{}.menu-group.ai-group{}body.dark .menu-group.ai-group{}.horizontal-divider{height:1px;background:#e5e7eb;margin:0}body.dark .horizontal-divider{background:#374151}.dark-mode-toggle-btn{padding:0;width:28px;height:28px;font-size:14px;background:#fef3c7;color:#f59e0b;border:1px solid #fde68a;border-radius:6px;cursor:pointer;transition:all 0.2s ease;display:inline-flex;align-items:center;justify-content:center}.dark-mode-toggle-btn:hover{background:#fde68a;border-color:#fcd34d;transform:translateY(-1px)}body.dark .dark-mode-toggle-btn{background:#78350f;border-color:#92400e;color:#fbbf24}body.dark .dark-mode-toggle-btn:hover{background:#92400e;border-color:#b45309}#fullscreenBtn{padding:0;width:28px;height:28px;font-size:16px;background:#f0f9ff;color:#0284c7;border:1px solid #bae6fd;border-radius:6px;cursor:pointer;transition:all 0.2s ease;display:inline-flex;align-items:center;justify-content:center;box-shadow:0 1px 2px rgba(0,0,0,0.05)}#fullscreenBtn:hover{background:#e0f2fe;border-color:#7dd3fc;transform:translateY(-1px);box-shadow:0 2px 4px rgba(2,132,199,0.1)}#fullscreenBtn:active{transform:translateY(0)}body.dark #fullscreenBtn{background:#0c4a6e;border-color:#075985;color:#38bdf8}body.dark #fullscreenBtn:hover{background:#075985;border-color:#0284c7;box-shadow:0 2px 4px rgba(56,189,248,0.2)}#fullscreenBtn.active-fullscreen{background:linear-gradient(135deg,#ef4444 0,#dc2626 100%);color:white;border-color:#ef4444;font-weight:600;box-shadow:0 2px 8px rgba(239,68,68,0.3)}#fullscreenBtn.active-fullscreen:hover{background:linear-gradient(135deg,#dc2626 0,#b91c1c 100%);border-color:#dc2626;box-shadow:0 3px 12px rgba(220,38,38,0.4)}body.dark #fullscreenBtn.active-fullscreen{background:linear-gradient(135deg,#ef4444 0,#dc2626 100%);border-color:#ef4444;box-shadow:0 2px 8px rgba(239,68,68,0.4)}body.dark #fullscreenBtn.active-fullscreen:hover{background:linear-gradient(135deg,#dc2626 0,#b91c1c 100%);border-color:#dc2626;box-shadow:0 3px 12px rgba(220,38,38,0.5)}.menu-btn.active-fullscreen{background:#ef4444;color:white;border-color:#ef4444;font-weight:600}.menu-btn.active-fullscreen:hover{background:#dc2626;border-color:#dc2626}body.dark .menu-btn.active-fullscreen{background:#ef4444;border-color:#ef4444}body.dark .menu-btn.active-fullscreen:hover{background:#dc2626;border-color:#dc2626}@media (max-width:1024px){.top-menu{padding:6px 10px}.menu-row{gap:8px;flex-wrap:wrap}.menu-section{gap:4px}.menu-divider{margin:0 4px}.group-label{font-size:10px;margin-right:4px}.menu-btn.small{padding:3px 6px;font-size:11px;height:24px}}@media (max-width:768px){.top-menu{padding:6px 8px;gap:6px}.menu-row{flex-direction:column;align-items:stretch;gap:6px}.menu-row-second,.menu-row-third{margin-top:0}.menu-section{flex-wrap:wrap;justify-content:flex-start}.menu-section-right{margin-left:0}.menu-divider{display:none}.group-label{width:100%;margin-bottom:2px;font-size:10px}.menu-group{flex-wrap:wrap;width:100%}.menu-btn.small{flex:1 1 auto;min-width:fit-content}}@media (max-width:640px){.top-menu{padding:5px 7px;gap:5px}.menu-btn{font-size:11.5px;padding:4px 7px}.menu-btn.small{padding:3px 6px;font-size:11px;height:23px}.menu-btn.zoom-btn,.dark-mode-toggle-btn,#fullscreenBtn{width:27px;height:27px;font-size:13px}.group-label{font-size:9.5px;margin-bottom:3px}.menu-section{gap:3px}.menu-group{gap:3px}}@media (max-width:480px){.top-menu{padding:4px 6px}.menu-btn{font-size:11px;padding:4px 6px}.menu-btn.small{padding:3px 5px;font-size:10.5px;height:22px;gap:2px}.menu-btn.zoom-btn,.dark-mode-toggle-btn,#fullscreenBtn{width:26px;height:26px;font-size:13px}.group-label{font-size:9px}}.mind-map-header{background:linear-gradient(135deg,#667eea 0,#764ba2 100%);color:white;padding:15px 30px;border-radius:12px;margin-bottom:20px;box-shadow:0 4px 15px rgba(0,0,0,0.1)}.mind-map-header h1{margin:0;font-size:1.8em;font-weight:700}.controls-panel{display:none;background:white;padding:20px;border-radius:12px;margin-bottom:20px;box-shadow:0 2px 10px rgba(0,0,0,0.05);flex-wrap:wrap;gap:10px;align-items:center}.control-group{display:flex;gap:10px;align-items:center}.control-label{font-weight:600;color:#555;margin-right:5px}.btn{padding:8px 16px;border:none;border-radius:6px;cursor:pointer;font-size:13px;font-weight:500;transition:all 0.3s ease;display:inline-flex;align-items:center;gap:5px}.btn svg{width:16px;height:16px}.btn-primary{background:linear-gradient(135deg,#667eea 0,#764ba2 100%);color:white}.btn-primary:hover{transform:translateY(-2px);box-shadow:0 4px 12px rgba(102,126,234,0.4)}.btn-secondary{background:#f0f0f0;color:#333}.btn-secondary:hover{background:#e0e0e0}.btn-success{background:#10b981;color:white}.btn-success:hover{background:#059669}.btn-info{background:#3b82f6;color:white}.btn-info:hover{background:#2563eb}.btn-warning{background:#f59e0b;color:white}.btn-warning:hover{background:#d97706}.context-menu{position:fixed;background:white;border-radius:6px;box-shadow:0 3px 12px rgba(0,0,0,0.1),0 0 0 1px rgba(0,0,0,0.05);padding:3px 0;min-width:160px;z-index:10000;animation:contextMenuSlideIn 0.15s cubic-bezier(0.34,1.56,0.64,1);user-select:none}@keyframes contextMenuSlideIn{from{opacity:0;transform:scale(0.95) translateY(-5px)}to{opacity:1;transform:scale(1) translateY(0)}}.context-menu-item{padding:6px 10px;cursor:pointer;display:flex;align-items:center;gap:8px;font-size:12.5px;color:#333;transition:all 0.15s ease;position:relative;line-height:1}.context-menu-item:hover{background:linear-gradient(135deg,#f3f4f6 0,#e5e7eb 100%)}.context-menu-item.danger{color:#ef4444}.context-menu-item.danger:hover{background:linear-gradient(135deg,#fee2e2 0,#fecaca 100%)}.context-menu-item .menu-icon{font-size:14px;width:16px;text-align:center;flex-shrink:0;line-height:1}.context-menu-item .menu-label{flex:1;white-space:nowrap;line-height:1}.context-menu-item .menu-shortcut{font-size:9.5px;color:#9ca3af;margin-left:auto;padding-left:12px;font-family:monospace;line-height:1}.context-menu-item .menu-arrow{font-size:9px;color:#9ca3af;margin-left:auto;line-height:1}.context-menu-divider{height:1px;background:linear-gradient(to right,transparent,#e5e7eb 20%,#e5e7eb 80%,transparent);margin:3px 0}.context-menu-item.has-submenu{position:relative}.context-submenu{position:absolute;left:100%;top:0;margin-left:4px;background:white;border-radius:5px;box-shadow:0 3px 12px rgba(0,0,0,0.1),0 0 0 1px rgba(0,0,0,0.05);padding:3px 0;min-width:140px;display:none;animation:submenuSlideIn 0.15s ease;z-index:10001}@keyframes submenuSlideIn{from{opacity:0;transform:translateX(-10px)}to{opacity:1;transform:translateX(0)}}.context-menu-item.has-submenu:hover .context-submenu{display:block}.context-submenu .context-menu-item{padding:5px 10px}.context-submenu .context-menu-item .menu-label{font-size:11.5px}.mind-map-canvas{background:white;border-radius:12px;box-shadow:0 2px 10px rgba(0,0,0,0.05);min-height:600px;position:relative;overflow:hidden;resize:vertical}.mind-map-canvas.grid-none{background:white}.mind-map-canvas.grid-dots{background-image:radial-gradient(circle,#e0e0e0 1px,transparent 1px);background-size:20px 20px}.mind-map-canvas.grid-lines{background-image:linear-gradient(rgba(200,200,200,0.3) 1px,transparent 1px),linear-gradient(90deg,rgba(200,200,200,0.3) 1px,transparent 1px);background-size:20px 20px}.mind-map-canvas.grid-crosses{background-image:linear-gradient(rgba(180,180,180,0.5) 1px,transparent 1px),linear-gradient(90deg,rgba(180,180,180,0.5) 1px,transparent 1px);background-size:40px 40px;background-position:-1px -1px}.mind-map-canvas[data-theme="default"],.mind-map-canvas[data-theme="default"].grid-none{background:linear-gradient(135deg,#f8f9fe 0,#fff 100%)}.mind-map-canvas[data-theme="default"].grid-dots{background-color:#f8f9fe;background-image:radial-gradient(circle,rgba(102,126,234,0.15) 1px,transparent 1px),linear-gradient(135deg,#f8f9fe 0,#fff 100%);background-size:20px 20px,100% 100%}.mind-map-canvas[data-theme="default"].grid-lines{background:linear-gradient(135deg,#f8f9fe 0,#fff 100%);background-image:linear-gradient(rgba(102,126,234,0.12) 1px,transparent 1px),linear-gradient(90deg,rgba(102,126,234,0.12) 1px,transparent 1px),linear-gradient(135deg,#f8f9fe 0,#fff 100%);background-size:20px 20px,20px 20px,100% 100%}.mind-map-canvas[data-theme="default"].grid-crosses{background:linear-gradient(135deg,#f8f9fe 0,#fff 100%);background-image:linear-gradient(rgba(102,126,234,0.18) 1px,transparent 1px),linear-gradient(90deg,rgba(102,126,234,0.18) 1px,transparent 1px),linear-gradient(135deg,#f8f9fe 0,#fff 100%);background-size:40px 40px,40px 40px,100% 100%;background-position:-1px -1px,-1px -1px,0 0}.mind-map-canvas[data-theme="ocean"],.mind-map-canvas[data-theme="ocean"].grid-none{background:linear-gradient(135deg,#e0f2fe 0,#f0f9ff 100%)}.mind-map-canvas[data-theme="ocean"].grid-dots{background-color:#e0f2fe;background-image:radial-gradient(circle,rgba(14,165,233,0.2) 1px,transparent 1px),linear-gradient(135deg,#e0f2fe 0,#f0f9ff 100%);background-size:20px 20px,100% 100%}.mind-map-canvas[data-theme="ocean"].grid-lines{background:linear-gradient(135deg,#e0f2fe 0,#f0f9ff 100%);background-image:linear-gradient(rgba(14,165,233,0.15) 1px,transparent 1px),linear-gradient(90deg,rgba(14,165,233,0.15) 1px,transparent 1px),linear-gradient(135deg,#e0f2fe 0,#f0f9ff 100%);background-size:20px 20px,20px 20px,100% 100%}.mind-map-canvas[data-theme="ocean"].grid-crosses{background:linear-gradient(135deg,#e0f2fe 0,#f0f9ff 100%);background-image:linear-gradient(rgba(14,165,233,0.25) 1px,transparent 1px),linear-gradient(90deg,rgba(14,165,233,0.25) 1px,transparent 1px),linear-gradient(135deg,#e0f2fe 0,#f0f9ff 100%);background-size:40px 40px,40px 40px,100% 100%;background-position:-1px -1px,-1px -1px,0 0}.mind-map-canvas[data-theme="forest"],.mind-map-canvas[data-theme="forest"].grid-none{background:linear-gradient(135deg,#ecfdf5 0,#f0fdf4 100%)}.mind-map-canvas[data-theme="forest"].grid-dots{background-color:#ecfdf5;background-image:radial-gradient(circle,rgba(45,106,79,0.15) 1px,transparent 1px),linear-gradient(135deg,#ecfdf5 0,#f0fdf4 100%);background-size:20px 20px,100% 100%}.mind-map-canvas[data-theme="forest"].grid-lines{background:linear-gradient(135deg,#ecfdf5 0,#f0fdf4 100%);background-image:linear-gradient(rgba(45,106,79,0.12) 1px,transparent 1px),linear-gradient(90deg,rgba(45,106,79,0.12) 1px,transparent 1px),linear-gradient(135deg,#ecfdf5 0,#f0fdf4 100%);background-size:20px 20px,20px 20px,100% 100%}.mind-map-canvas[data-theme="forest"].grid-crosses{background:linear-gradient(135deg,#ecfdf5 0,#f0fdf4 100%);background-image:linear-gradient(rgba(45,106,79,0.2) 1px,transparent 1px),linear-gradient(90deg,rgba(45,106,79,0.2) 1px,transparent 1px),linear-gradient(135deg,#ecfdf5 0,#f0fdf4 100%);background-size:40px 40px,40px 40px,100% 100%;background-position:-1px -1px,-1px -1px,0 0}.mind-map-canvas[data-theme="sunset"],.mind-map-canvas[data-theme="sunset"].grid-none{background:linear-gradient(135deg,#fff7ed 0,#fffbeb 100%)}.mind-map-canvas[data-theme="sunset"].grid-dots{background-color:#fff7ed;background-image:radial-gradient(circle,rgba(247,127,0,0.15) 1px,transparent 1px),linear-gradient(135deg,#fff7ed 0,#fffbeb 100%);background-size:20px 20px,100% 100%}.mind-map-canvas[data-theme="sunset"].grid-lines{background:linear-gradient(135deg,#fff7ed 0,#fffbeb 100%);background-image:linear-gradient(rgba(247,127,0,0.12) 1px,transparent 1px),linear-gradient(90deg,rgba(247,127,0,0.12) 1px,transparent 1px),linear-gradient(135deg,#fff7ed 0,#fffbeb 100%);background-size:20px 20px,20px 20px,100% 100%}.mind-map-canvas[data-theme="sunset"].grid-crosses{background:linear-gradient(135deg,#fff7ed 0,#fffbeb 100%);background-image:linear-gradient(rgba(247,127,0,0.2) 1px,transparent 1px),linear-gradient(90deg,rgba(247,127,0,0.2) 1px,transparent 1px),linear-gradient(135deg,#fff7ed 0,#fffbeb 100%);background-size:40px 40px,40px 40px,100% 100%;background-position:-1px -1px,-1px -1px,0 0}.mind-map-canvas[data-theme="purple"],.mind-map-canvas[data-theme="purple"].grid-none{background:linear-gradient(135deg,#faf5ff 0,#fdf4ff 100%)}.mind-map-canvas[data-theme="purple"].grid-dots{background-color:#faf5ff;background-image:radial-gradient(circle,rgba(181,23,158,0.15) 1px,transparent 1px),linear-gradient(135deg,#faf5ff 0,#fdf4ff 100%);background-size:20px 20px,100% 100%}.mind-map-canvas[data-theme="purple"].grid-lines{background:linear-gradient(135deg,#faf5ff 0,#fdf4ff 100%);background-image:linear-gradient(rgba(181,23,158,0.12) 1px,transparent 1px),linear-gradient(90deg,rgba(181,23,158,0.12) 1px,transparent 1px),linear-gradient(135deg,#faf5ff 0,#fdf4ff 100%);background-size:20px 20px,20px 20px,100% 100%}.mind-map-canvas[data-theme="purple"].grid-crosses{background:linear-gradient(135deg,#faf5ff 0,#fdf4ff 100%);background-image:linear-gradient(rgba(181,23,158,0.2) 1px,transparent 1px),linear-gradient(90deg,rgba(181,23,158,0.2) 1px,transparent 1px),linear-gradient(135deg,#faf5ff 0,#fdf4ff 100%);background-size:40px 40px,40px 40px,100% 100%;background-position:-1px -1px,-1px -1px,0 0}.mind-map-canvas[data-theme="mono"],.mind-map-canvas[data-theme="mono"].grid-none{background:linear-gradient(135deg,#f8f9fa 0,#fff 100%)}.mind-map-canvas[data-theme="mono"].grid-dots{background-color:#f8f9fa;background-image:radial-gradient(circle,rgba(108,117,125,0.2) 1px,transparent 1px),linear-gradient(135deg,#f8f9fa 0,#fff 100%);background-size:20px 20px,100% 100%}.mind-map-canvas[data-theme="mono"].grid-lines{background:linear-gradient(135deg,#f8f9fa 0,#fff 100%);background-image:linear-gradient(rgba(108,117,125,0.15) 1px,transparent 1px),linear-gradient(90deg,rgba(108,117,125,0.15) 1px,transparent 1px),linear-gradient(135deg,#f8f9fa 0,#fff 100%);background-size:20px 20px,20px 20px,100% 100%}.mind-map-canvas[data-theme="mono"].grid-crosses{background:linear-gradient(135deg,#f8f9fa 0,#fff 100%);background-image:linear-gradient(rgba(108,117,125,0.25) 1px,transparent 1px),linear-gradient(90deg,rgba(108,117,125,0.25) 1px,transparent 1px),linear-gradient(135deg,#f8f9fa 0,#fff 100%);background-size:40px 40px,40px 40px,100% 100%;background-position:-1px -1px,-1px -1px,0 0}.mind-map-canvas[data-theme="sakura"],.mind-map-canvas[data-theme="sakura"].grid-none{background:linear-gradient(135deg,#fdf2f8 0,#fef3f9 100%)}.mind-map-canvas[data-theme="sakura"].grid-dots{background-color:#fdf2f8;background-image:radial-gradient(circle,rgba(255,105,180,0.12) 1px,transparent 1px),linear-gradient(135deg,#fdf2f8 0,#fef3f9 100%);background-size:20px 20px,100% 100%}.mind-map-canvas[data-theme="sakura"].grid-lines{background:linear-gradient(135deg,#fdf2f8 0,#fef3f9 100%);background-image:linear-gradient(rgba(255,105,180,0.1) 1px,transparent 1px),linear-gradient(90deg,rgba(255,105,180,0.1) 1px,transparent 1px),linear-gradient(135deg,#fdf2f8 0,#fef3f9 100%);background-size:20px 20px,20px 20px,100% 100%}.mind-map-canvas[data-theme="sakura"].grid-crosses{background:linear-gradient(135deg,#fdf2f8 0,#fef3f9 100%);background-image:linear-gradient(rgba(255,105,180,0.18) 1px,transparent 1px),linear-gradient(90deg,rgba(255,105,180,0.18) 1px,transparent 1px),linear-gradient(135deg,#fdf2f8 0,#fef3f9 100%);background-size:40px 40px,40px 40px,100% 100%;background-position:-1px -1px,-1px -1px,0 0}.mind-map-canvas[data-theme="mint"],.mind-map-canvas[data-theme="mint"].grid-none{background:linear-gradient(135deg,#f0fdfa 0,#f0fdf4 100%)}.mind-map-canvas[data-theme="mint"].grid-dots{background-color:#f0fdfa;background-image:radial-gradient(circle,rgba(0,212,170,0.15) 1px,transparent 1px),linear-gradient(135deg,#f0fdfa 0,#f0fdf4 100%);background-size:20px 20px,100% 100%}.mind-map-canvas[data-theme="mint"].grid-lines{background:linear-gradient(135deg,#f0fdfa 0,#f0fdf4 100%);background-image:linear-gradient(rgba(0,212,170,0.12) 1px,transparent 1px),linear-gradient(90deg,rgba(0,212,170,0.12) 1px,transparent 1px),linear-gradient(135deg,#f0fdfa 0,#f0fdf4 100%);background-size:20px 20px,20px 20px,100% 100%}.mind-map-canvas[data-theme="mint"].grid-crosses{background:linear-gradient(135deg,#f0fdfa 0,#f0fdf4 100%);background-image:linear-gradient(rgba(0,212,170,0.2) 1px,transparent 1px),linear-gradient(90deg,rgba(0,212,170,0.2) 1px,transparent 1px),linear-gradient(135deg,#f0fdfa 0,#f0fdf4 100%);background-size:40px 40px,40px 40px,100% 100%;background-position:-1px -1px,-1px -1px,0 0}.mind-map-canvas[data-theme="berry"],.mind-map-canvas[data-theme="berry"].grid-none{background:linear-gradient(135deg,#fef2f2 0,#fff1f2 100%)}.mind-map-canvas[data-theme="berry"].grid-dots{background-color:#fef2f2;background-image:radial-gradient(circle,rgba(201,24,74,0.12) 1px,transparent 1px),linear-gradient(135deg,#fef2f2 0,#fff1f2 100%);background-size:20px 20px,100% 100%}.mind-map-canvas[data-theme="berry"].grid-lines{background:linear-gradient(135deg,#fef2f2 0,#fff1f2 100%);background-image:linear-gradient(rgba(201,24,74,0.1) 1px,transparent 1px),linear-gradient(90deg,rgba(201,24,74,0.1) 1px,transparent 1px),linear-gradient(135deg,#fef2f2 0,#fff1f2 100%);background-size:20px 20px,20px 20px,100% 100%}.mind-map-canvas[data-theme="berry"].grid-crosses{background:linear-gradient(135deg,#fef2f2 0,#fff1f2 100%);background-image:linear-gradient(rgba(201,24,74,0.18) 1px,transparent 1px),linear-gradient(90deg,rgba(201,24,74,0.18) 1px,transparent 1px),linear-gradient(135deg,#fef2f2 0,#fff1f2 100%);background-size:40px 40px,40px 40px,100% 100%;background-position:-1px -1px,-1px -1px,0 0}.mind-map-canvas[data-theme="autumn"],.mind-map-canvas[data-theme="autumn"].grid-none{background:linear-gradient(135deg,#fef3c7 0,#fef9e7 100%)}.mind-map-canvas[data-theme="autumn"].grid-dots{background-color:#fef3c7;background-image:radial-gradient(circle,rgba(231,111,81,0.15) 1px,transparent 1px),linear-gradient(135deg,#fef3c7 0,#fef9e7 100%);background-size:20px 20px,100% 100%}.mind-map-canvas[data-theme="autumn"].grid-lines{background:linear-gradient(135deg,#fef3c7 0,#fef9e7 100%);background-image:linear-gradient(rgba(231,111,81,0.12) 1px,transparent 1px),linear-gradient(90deg,rgba(231,111,81,0.12) 1px,transparent 1px),linear-gradient(135deg,#fef3c7 0,#fef9e7 100%);background-size:20px 20px,20px 20px,100% 100%}.mind-map-canvas[data-theme="autumn"].grid-crosses{background:linear-gradient(135deg,#fef3c7 0,#fef9e7 100%);background-image:linear-gradient(rgba(231,111,81,0.2) 1px,transparent 1px),linear-gradient(90deg,rgba(231,111,81,0.2) 1px,transparent 1px),linear-gradient(135deg,#fef3c7 0,#fef9e7 100%);background-size:40px 40px,40px 40px,100% 100%;background-position:-1px -1px,-1px -1px,0 0}.mind-map-canvas[data-theme="neon"],.mind-map-canvas[data-theme="neon"].grid-none{background:linear-gradient(135deg,#faf5ff 0,#f5f3ff 100%)}.mind-map-canvas[data-theme="neon"].grid-dots{background-color:#faf5ff;background-image:radial-gradient(circle,rgba(255,0,110,0.12) 1px,transparent 1px),linear-gradient(135deg,#faf5ff 0,#f5f3ff 100%);background-size:20px 20px,100% 100%}.mind-map-canvas[data-theme="neon"].grid-lines{background:linear-gradient(135deg,#faf5ff 0,#f5f3ff 100%);background-image:linear-gradient(rgba(255,0,110,0.1) 1px,transparent 1px),linear-gradient(90deg,rgba(255,0,110,0.1) 1px,transparent 1px),linear-gradient(135deg,#faf5ff 0,#f5f3ff 100%);background-size:20px 20px,20px 20px,100% 100%}.mind-map-canvas[data-theme="neon"].grid-crosses{background:linear-gradient(135deg,#faf5ff 0,#f5f3ff 100%);background-image:linear-gradient(rgba(255,0,110,0.18) 1px,transparent 1px),linear-gradient(90deg,rgba(255,0,110,0.18) 1px,transparent 1px),linear-gradient(135deg,#faf5ff 0,#f5f3ff 100%);background-size:40px 40px,40px 40px,100% 100%;background-position:-1px -1px,-1px -1px,0 0}.mind-map-canvas[data-theme="earth"],.mind-map-canvas[data-theme="earth"].grid-none{background:linear-gradient(135deg,#fef8f3 0,#fffaf5 100%)}.mind-map-canvas[data-theme="earth"].grid-dots{background-color:#fef8f3;background-image:radial-gradient(circle,rgba(155,107,74,0.15) 1px,transparent 1px),linear-gradient(135deg,#fef8f3 0,#fffaf5 100%);background-size:20px 20px,100% 100%}.mind-map-canvas[data-theme="earth"].grid-lines{background:linear-gradient(135deg,#fef8f3 0,#fffaf5 100%);background-image:linear-gradient(rgba(155,107,74,0.12) 1px,transparent 1px),linear-gradient(90deg,rgba(155,107,74,0.12) 1px,transparent 1px),linear-gradient(135deg,#fef8f3 0,#fffaf5 100%);background-size:20px 20px,20px 20px,100% 100%}.mind-map-canvas[data-theme="earth"].grid-crosses{background:linear-gradient(135deg,#fef8f3 0,#fffaf5 100%);background-image:linear-gradient(rgba(155,107,74,0.2) 1px,transparent 1px),linear-gradient(90deg,rgba(155,107,74,0.2) 1px,transparent 1px),linear-gradient(135deg,#fef8f3 0,#fffaf5 100%);background-size:40px 40px,40px 40px,100% 100%;background-position:-1px -1px,-1px -1px,0 0}.mind-map-canvas[data-theme="lavender"],.mind-map-canvas[data-theme="lavender"].grid-none{background:linear-gradient(135deg,#faf5ff 0,#f3e8ff 100%)}.mind-map-canvas[data-theme="lavender"].grid-dots{background-color:#faf5ff;background-image:radial-gradient(circle,rgba(157,78,221,0.12) 1px,transparent 1px),linear-gradient(135deg,#faf5ff 0,#f3e8ff 100%);background-size:20px 20px,100% 100%}.mind-map-canvas[data-theme="lavender"].grid-lines{background:linear-gradient(135deg,#faf5ff 0,#f3e8ff 100%);background-image:linear-gradient(rgba(157,78,221,0.1) 1px,transparent 1px),linear-gradient(90deg,rgba(157,78,221,0.1) 1px,transparent 1px),linear-gradient(135deg,#faf5ff 0,#f3e8ff 100%);background-size:20px 20px,20px 20px,100% 100%}.mind-map-canvas[data-theme="lavender"].grid-crosses{background:linear-gradient(135deg,#faf5ff 0,#f3e8ff 100%);background-image:linear-gradient(rgba(157,78,221,0.18) 1px,transparent 1px),linear-gradient(90deg,rgba(157,78,221,0.18) 1px,transparent 1px),linear-gradient(135deg,#faf5ff 0,#f3e8ff 100%);background-size:40px 40px,40px 40px,100% 100%;background-position:-1px -1px,-1px -1px,0 0}.mind-map-canvas[data-theme="coral"],.mind-map-canvas[data-theme="coral"].grid-none{background:linear-gradient(135deg,#fff5f5 0,#fef2f2 100%)}.mind-map-canvas[data-theme="coral"].grid-dots{background-color:#fff5f5;background-image:radial-gradient(circle,rgba(255,107,107,0.12) 1px,transparent 1px),linear-gradient(135deg,#fff5f5 0,#fef2f2 100%);background-size:20px 20px,100% 100%}.mind-map-canvas[data-theme="coral"].grid-lines{background:linear-gradient(135deg,#fff5f5 0,#fef2f2 100%);background-image:linear-gradient(rgba(255,107,107,0.1) 1px,transparent 1px),linear-gradient(90deg,rgba(255,107,107,0.1) 1px,transparent 1px),linear-gradient(135deg,#fff5f5 0,#fef2f2 100%);background-size:20px 20px,20px 20px,100% 100%}.mind-map-canvas[data-theme="coral"].grid-crosses{background:linear-gradient(135deg,#fff5f5 0,#fef2f2 100%);background-image:linear-gradient(rgba(255,107,107,0.18) 1px,transparent 1px),linear-gradient(90deg,rgba(255,107,107,0.18) 1px,transparent 1px),linear-gradient(135deg,#fff5f5 0,#fef2f2 100%);background-size:40px 40px,40px 40px,100% 100%;background-position:-1px -1px,-1px -1px,0 0}.mind-map-canvas[data-theme="teal"],.mind-map-canvas[data-theme="teal"].grid-none{background:linear-gradient(135deg,#f0fdfa 0,#ecfeff 100%)}.mind-map-canvas[data-theme="teal"].grid-dots{background-color:#f0fdfa;background-image:radial-gradient(circle,rgba(13,148,136,0.15) 1px,transparent 1px),linear-gradient(135deg,#f0fdfa 0,#ecfeff 100%);background-size:20px 20px,100% 100%}.mind-map-canvas[data-theme="teal"].grid-lines{background:linear-gradient(135deg,#f0fdfa 0,#ecfeff 100%);background-image:linear-gradient(rgba(13,148,136,0.12) 1px,transparent 1px),linear-gradient(90deg,rgba(13,148,136,0.12) 1px,transparent 1px),linear-gradient(135deg,#f0fdfa 0,#ecfeff 100%);background-size:20px 20px,20px 20px,100% 100%}.mind-map-canvas[data-theme="teal"].grid-crosses{background:linear-gradient(135deg,#f0fdfa 0,#ecfeff 100%);background-image:linear-gradient(rgba(13,148,136,0.2) 1px,transparent 1px),linear-gradient(90deg,rgba(13,148,136,0.2) 1px,transparent 1px),linear-gradient(135deg,#f0fdfa 0,#ecfeff 100%);background-size:40px 40px,40px 40px,100% 100%;background-position:-1px -1px,-1px -1px,0 0}body.dark .mind-map-canvas{background:#1f2937}body.dark .mind-map-canvas.grid-none{background:#1f2937}body.dark .mind-map-canvas.grid-dots{background-color:#1f2937;background-image:radial-gradient(circle,#4b5563 1px,transparent 1px);background-size:20px 20px}body.dark .mind-map-canvas.grid-lines{background-color:#1f2937;background-image:linear-gradient(rgba(75,85,99,0.3) 1px,transparent 1px),linear-gradient(90deg,rgba(75,85,99,0.3) 1px,transparent 1px);background-size:20px 20px}body.dark .mind-map-canvas.grid-crosses{background-color:#1f2937;background-image:linear-gradient(rgba(100,116,139,0.5) 1px,transparent 1px),linear-gradient(90deg,rgba(100,116,139,0.5) 1px,transparent 1px);background-size:40px 40px;background-position:-1px -1px}.canvas-resize-handle{position:absolute;bottom:0;left:0;width:100%;height:12px;background:linear-gradient(to bottom,transparent,rgba(102,126,234,0.1));cursor:ns-resize;display:flex;align-items:center;justify-content:center;transition:all 0.2s ease;z-index:100}.canvas-resize-handle:hover{background:linear-gradient(to bottom,transparent,rgba(102,126,234,0.2));height:16px}.resize-handle-icon{color:#667eea;font-size:14px;font-weight:bold;opacity:0.5;transition:opacity 0.2s ease;letter-spacing:2px}.canvas-resize-handle:hover .resize-handle-icon{opacity:1}.mind-map-canvas.fullscreen{position:fixed;top:50px;left:0;width:100vw;height:calc(100vh - 50px);z-index:9998;border-radius:0;margin:0}#mindMapSvg{width:100%;height:600px;cursor:grab}.mind-map-canvas.fullscreen #mindMapSvg{height:calc(100vh - 50px)}#mindMapSvg:active{cursor:grabbing}.node{cursor:pointer;transition:all 0.3s ease}.node:hover{filter:brightness(1.1)}.node-rect{stroke:#5a67d8;stroke-width:2;rx:10;ry:10;filter:drop-shadow(0 2px 4px rgba(0,0,0,0.1));transition:all 0.3s ease}.node-rect.root{stroke:#764ba2;stroke-width:3}.node-rect.selected{stroke:#f59e0b;stroke-width:3;filter:drop-shadow(0 4px 8px rgba(245,158,11,0.3))}.node-rect.keynav-highlight{stroke:#3b82f6;stroke-width:3;stroke-dasharray:5,5;animation:dash 1s linear infinite}.node-rect.multi-selected{stroke:#10b981;stroke-width:3;filter:drop-shadow(0 4px 8px rgba(16,185,129,0.3))}@keyframes dash{to{stroke-dashoffset:-10}}.node-rect.dragging{opacity:0.7;cursor:move}.node-text{fill:white;font-size:14px;font-weight:500;text-anchor:middle;dominant-baseline:middle;pointer-events:none;user-select:none}.node-circle{fill:#10b981;stroke:#059669;stroke-width:2}.node-expand-btn{fill:#e5e7eb;stroke:#9ca3af;stroke-width:1;cursor:pointer;transition:all 0.2s ease}.node-expand-btn:hover{fill:#d1d5db}.note{cursor:move;user-select:none}.fullscreen-header{display:none;position:fixed;top:0;left:0;width:100%;height:50px;background:linear-gradient(135deg,#667eea 0,#764ba2 100%);z-index:9999;padding:0 20px;align-items:center;justify-content:space-between;box-shadow:0 2px 10px rgba(0,0,0,0.2);overflow:hidden}.fullscreen-header.active{display:flex}.fullscreen-header h2{color:white;margin:0;font-size:1em;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;flex-shrink:0;margin-right:10px;min-width:100px}.fullscreen-controls{display:flex;gap:6px;flex-wrap:nowrap;justify-content:flex-end;align-items:center;flex-shrink:1;overflow-x:auto;overflow-y:hidden;max-width:calc(100% - 120px);padding-right:60px;scrollbar-width:thin;scrollbar-color:rgba(255,255,255,0.3) transparent}.fullscreen-controls::-webkit-scrollbar{height:4px}.fullscreen-controls::-webkit-scrollbar-track{background:transparent}.fullscreen-controls::-webkit-scrollbar-thumb{background:rgba(255,255,255,0.3);border-radius:2px}.fullscreen-controls::-webkit-scrollbar-thumb:hover{background:rgba(255,255,255,0.5)}.fullscreen-controls button{padding:4px 8px;font-size:11px;white-space:nowrap;flex-shrink:0;min-width:auto}.btn-sm{padding:4px 8px;font-size:11px;line-height:1.2}.btn-light{background:rgba(255,255,255,0.95);color:#333;border:1px solid rgba(255,255,255,0.3)}.btn-light:hover{background:rgba(255,255,255,1);transform:translateY(-1px)}.separator{color:rgba(255,255,255,0.5);font-weight:300;margin:0 2px;font-size:10px}.note-rect{fill:#fffbeb;stroke:#fbbf24;stroke-width:2;rx:6;ry:6;opacity:0.5;transition:all 0.2s;filter:drop-shadow(0 2px 4px rgba(0,0,0,0.1))}.note-rect:hover{opacity:0.7;stroke-width:3;filter:drop-shadow(0 4px 8px rgba(251,191,36,0.3))}.note-text{fill:#78350f;font-size:15px;font-weight:700;pointer-events:none;user-select:none}.theme-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(100px,1fr));gap:10px}.theme-item{padding:10px;border:2px solid #e5e7eb;border-radius:8px;text-align:center;cursor:pointer;transition:all 0.3s ease}.theme-item:hover{border-color:#667eea;background:#f9fafb;transform:translateY(-2px);box-shadow:0 2px 8px rgba(102,126,234,0.2)}.theme-item h3{font-size:13px;margin:6px 0 0 0;color:#374151;font-weight:600}.theme-item p{display:none}.theme-preview{width:100%;height:50px;border-radius:6px;margin-bottom:0}.default-theme{background:linear-gradient(135deg,#667eea 0,#764ba2 100%)}.ocean-theme{background:linear-gradient(135deg,#0077be 0,#00b4d8 50%,#90e0ef 100%)}.forest-theme{background:linear-gradient(135deg,#2d6a4f 0,#40916c 50%,#95d5b2 100%)}.sunset-theme{background:linear-gradient(135deg,#f77f00 0,#d62828 50%,#fcbf49 100%)}.purple-theme{background:linear-gradient(135deg,#7209b7 0,#b5179e 50%,#f72585 100%)}.mono-theme{background:linear-gradient(135deg,#495057 0,#6c757d 50%,#adb5bd 100%)}.sakura-theme{background:linear-gradient(135deg,#ff69b4 0,#ffb6c1 50%,#ffc0cb 100%)}.mint-theme{background:linear-gradient(135deg,#00d4aa 0,#7de2d1 50%,#b4f1e8 100%)}.berry-theme{background:linear-gradient(135deg,#c9184a 0,#ff4d6d 50%,#ff758f 100%)}.autumn-theme{background:linear-gradient(135deg,#e76f51 0,#f4a261 50%,#e9c46a 100%)}.neon-theme{background:linear-gradient(135deg,#ff006e 0,#8338ec 50%,#3a86ff 100%)}.earth-theme{background:linear-gradient(135deg,#9b6b4a 0,#b8926a 50%,#d4a574 100%)}.lavender-theme{background:linear-gradient(135deg,#9d4edd 0,#c77dff 50%,#e0aaff 100%)}.coral-theme{background:linear-gradient(135deg,#ff6b6b 0,#ff8787 50%,#ffa5a5 100%)}.teal-theme{background:linear-gradient(135deg,#0d9488 0,#14b8a6 50%,#5eead4 100%)}.batch-ops-info{background:#f0f9ff;border-left:4px solid #3b82f6;padding:10px 15px;border-radius:4px;margin-bottom:10px}.batch-ops-info p{margin:0;color:#1e40af;font-size:0.9em}.info-text{color:#666;font-size:0.9em;margin:5px 0}.rationality-results{max-height:400px;overflow-y:auto}.rationality-results h3{margin:0 0 15px 0;color:#333}.suggestion-item{padding:12px;border-radius:6px;margin-bottom:10px;border-left:4px solid #e5e7eb}.suggestion-item.error{background:#fef2f2;border-left-color:#ef4444}.suggestion-item.warning{background:#fffbeb;border-left-color:#f59e0b}.suggestion-item.info{background:#f0f9ff;border-left-color:#3b82f6}.btn-danger{background:#ef4444;color:white}.btn-danger:hover{background:#dc2626}.link{fill:none;stroke:#cbd5e0;stroke-width:2;transition:all 0.3s ease}.link.selected{stroke:#f59e0b;stroke-width:3}.modal{display:none;position:fixed;z-index:10000;left:0;top:0;width:100%;height:100%;background-color:rgba(0,0,0,0.5);animation:fadeIn 0.3s ease;backdrop-filter:blur(4px)}.modal-content{background-color:white;margin:5% auto;padding:0;border-radius:12px;width:90%;max-width:600px;box-shadow:0 10px 40px rgba(0,0,0,0.2);animation:slideDown 0.3s ease}.modal-header{padding:20px 30px;background:linear-gradient(135deg,#667eea 0,#764ba2 100%);color:white;border-radius:12px 12px 0 0;display:flex;justify-content:space-between;align-items:center}.modal-header h2{margin:0;font-size:1.5em}.close-btn{background:none;border:none;color:white;font-size:28px;cursor:pointer;padding:0;width:30px;height:30px;line-height:30px;text-align:center}.close-btn:hover{opacity:0.8}.modal-body{padding:30px}.template-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(150px,1fr));gap:15px}.template-item{padding:20px;border:2px solid #e5e7eb;border-radius:8px;text-align:center;cursor:pointer;transition:all 0.3s ease}.template-item:hover{border-color:#667eea;background:#f9fafb;transform:translateY(-2px)}.template-icon{font-size:2em;margin-bottom:10px}.template-item h3{margin:10px 0 5px 0;font-size:1em;color:#333}.template-item p{margin:0;font-size:0.85em;color:#666}.input-group{margin-bottom:20px}.input-group label{display:block;margin-bottom:8px;font-weight:600;color:#333}.input-group input,.input-group textarea{width:100%;padding:12px;border:2px solid #e5e7eb;border-radius:8px;font-size:14px;transition:border-color 0.3s ease}.input-group input:focus,.input-group textarea:focus{outline:none;border-color:#667eea}.dark-mode-toggle{background:#1f2937;color:white;padding:10px 20px;border:none;border-radius:8px;cursor:pointer;font-size:14px;font-weight:600;transition:all 0.3s ease}.dark-mode-toggle:hover{background:#111827}body.dark{background:#1f2937;color:#f9fafb}body.dark .mind-map-canvas{background:#374151}body.dark .controls-panel{background:#374151;color:#f9fafb}body.dark .node-rect{stroke:#6366f1}body.dark .node-rect.selected{stroke:#fbbf24;stroke-width:3}body.dark .link{stroke:#6b7280}.status-bar{background:white;padding:15px 20px;border-radius:8px;margin-top:20px;box-shadow:0 2px 10px rgba(0,0,0,0.05);display:flex;justify-content:space-between;align-items:center}body.dark .status-bar{background:#374151}.status-item{display:flex;align-items:center;gap:8px}.status-icon{font-size:1.2em}.history-list{max-height:400px;overflow-y:auto}.history-item{padding:15px;border:1px solid #e5e7eb;border-radius:8px;margin-bottom:10px;cursor:pointer;transition:all 0.3s ease}.history-item:hover{background:#f9fafb;border-color:#667eea}.history-item-time{color:#666;font-size:0.9em}.usage-guide{background:#f0f9ff;border-left:4px solid #3b82f6;padding:0;border-radius:8px;margin-top:20px}.instructions-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:16px;margin-bottom:24px;padding:20px}.instruction-item{display:flex;gap:14px;padding:18px;background:linear-gradient(135deg,#f8f9fa 0,#fff 100%);border-radius:10px;border-left:4px solid #667eea;box-shadow:0 2px 6px rgba(0,0,0,0.04);transition:all 0.3s ease}.instruction-item:hover{transform:translateX(5px);box-shadow:0 5px 18px rgba(102,126,234,0.12);border-left-color:#764ba2}.instruction-icon{font-size:32px;flex-shrink:0;filter:drop-shadow(0 2px 4px rgba(0,0,0,0.1))}.instruction-text{flex:1}.instruction-text strong{display:block;margin-bottom:5px;color:#2d3748;font-size:16px;font-weight:700}.instruction-text br + text{color:#6c757d;line-height:1.5}.canvas-tips{background:linear-gradient(135deg,#667eea 0,#764ba2 100%);padding:30px;border-radius:14px;box-shadow:0 8px 32px rgba(102,126,234,0.2);position:relative;overflow:hidden}.canvas-tips::before{content:'';position:absolute;top:0;left:0;right:0;height:3px;background:linear-gradient(90deg,#ffd700,#ff6b6b,#51cf66,#4dabf7,#ffd700);background-size:200% 100%;animation:gradientFlow 3s linear infinite}@keyframes gradientFlow{0%{background-position:0 0}100%{background-position:200% 0}}.canvas-tips h4{margin:0 0 22px 0;font-size:22px;color:white;font-weight:700;text-shadow:0 2px 6px rgba(0,0,0,0.15);letter-spacing:0.3px}.usage-sections{display:grid;grid-template-columns:repeat(4,1fr);gap:14px;margin-top:0}.usage-section{background:white;padding:18px;border-radius:10px;border:2px solid rgba(255,255,255,0.25);box-shadow:0 3px 16px rgba(0,0,0,0.08);transition:all 0.3s cubic-bezier(0.4,0,0.2,1);min-width:0;backdrop-filter:blur(8px);position:relative;overflow:hidden}.usage-section::before{content:'';position:absolute;top:0;left:0;right:0;height:3px;background:linear-gradient(90deg,#667eea,#764ba2);transform:scaleX(0);transform-origin:left;transition:transform 0.3s ease}.usage-section:hover::before{transform:scaleX(1)}.usage-section:hover{border-color:rgba(255,255,255,0.45);box-shadow:0 6px 24px rgba(0,0,0,0.12);transform:translateY(-2px)}.usage-section h5{margin:0 0 12px 0;font-size:15px;font-weight:700;color:#667eea;display:flex;align-items:center;gap:5px;padding-bottom:8px;border-bottom:2px solid rgba(102,126,234,0.12)}.usage-section ul{margin:0;padding:0;list-style:none}.usage-section li{margin:0;padding:7px 10px;color:#495057;line-height:1.5;font-size:12.5px;border-radius:5px;transition:all 0.2s ease;position:relative;padding-left:18px}.usage-section li::before{content:'▸';position:absolute;left:5px;color:#667eea;font-size:9px;top:50%;transform:translateY(-50%)}.usage-section li:hover{background:rgba(102,126,234,0.06);padding-left:22px}.usage-section li strong{color:#2d3748;font-weight:600;font-size:13px}.usage-guide kbd{background:white;border:1px solid #cbd5e0;border-radius:4px;padding:2px 6px;font-size:0.9em;font-family:monospace;box-shadow:0 1px 2px rgba(0,0,0,0.1)}body.dark .usage-guide{background:#1e3a5f;border-left-color:#60a5fa}body.dark .instruction-item{background:linear-gradient(135deg,#2d3748 0,#374151 100%);border-left-color:#60a5fa}body.dark .instruction-text strong{color:#e5e7eb}body.dark .canvas-tips{background:linear-gradient(135deg,#1e3a8a 0,#6b21a8 100%)}body.dark .usage-section{background:rgba(31,41,55,0.9);border-color:rgba(255,255,255,0.1)}body.dark .usage-section h5{color:#93c5fd;border-bottom-color:rgba(147,197,253,0.2)}body.dark .usage-section li{color:#d1d5db}body.dark .usage-section li strong{color:#f3f4f6}body.dark .usage-section li::before{color:#93c5fd}body.dark .usage-guide kbd{background:#374151;border-color:#4b5563;color:#f3f4f6}@keyframes fadeIn{from{opacity:0}to{opacity:1}}@keyframes slideDown{from{transform:translateY(-50px);opacity:0}to{transform:translateY(0);opacity:1}}@media (max-width:768px){.mind-map-header h1{font-size:1.8em}.controls-panel{flex-direction:column;align-items:stretch}.control-group{width:100%}.template-grid{grid-template-columns:repeat(2,1fr)}.btn{font-size:12px;padding:6px 12px}.instructions-grid{grid-template-columns:1fr;gap:12px}.usage-sections{grid-template-columns:1fr;gap:10px}.usage-section{padding:14px}.usage-section h5{font-size:13px}.usage-section li{font-size:11px;padding:6px 8px}}