:root{--primary-color: #3B82F6;--secondary-color: #6366F1;--success-color: #10B981;--danger-color: #EF4444;--warning-color: #F59E0B;--info-color: #6B7280;--bg-color: #FFFFFF;--bg-primary: #FFFFFF;--surface-color: #F9FAFB;--border-color: #E5E7EB;--text-color: #1F2937;--text-primary: #1F2937;--text-secondary: #6B7280;--toolbar-height: 60px;--statusbar-height: 32px}body.dark-theme{--bg-color: #111827;--bg-primary: #111827;--surface-color: #1F2937;--border-color: #374151;--text-color: #F9FAFB;--text-primary: #F9FAFB;--text-secondary: #9CA3AF}*{margin:0;padding:0;box-sizing:border-box}body{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica Neue,Arial,sans-serif;background-color:var(--bg-color);color:var(--text-color);overflow:hidden}#app{width:100vw;height:100vh;display:flex;flex-direction:column}.toolbar{height:var(--toolbar-height);background-color:var(--surface-color);border-bottom:1px solid var(--border-color);display:flex;align-items:center;justify-content:space-between;padding:0 1rem;gap:2rem}.toolbar-section{display:flex;align-items:center;gap:.5rem}.toolbar-btn{display:flex;align-items:center;gap:.25rem;padding:.5rem .75rem;background-color:transparent;color:var(--text-color);border:1px solid transparent;border-radius:6px;cursor:pointer;font-size:14px;transition:all .2s;white-space:nowrap}.toolbar-btn:hover{background-color:var(--border-color)}.toolbar-btn:active{transform:translateY(1px)}.toolbar-btn span{font-size:16px}.toolbar-separator{width:1px;height:24px;background-color:var(--border-color);margin:0 .5rem}.toolbar-select{padding:.25rem .5rem;border-radius:6px;border:1px solid var(--border-color);background-color:var(--bg-primary);color:var(--text-primary);font-size:14px;cursor:pointer;transition:all .2s}.toolbar-select:hover{background-color:var(--border-color)}.toolbar-select:focus{outline:none;border-color:#3b82f6;box-shadow:0 0 0 2px #3b82f633}.dropdown{position:relative;display:inline-block}.dropdown-toggle{display:flex;align-items:center;gap:.25rem}.dropdown-arrow{font-size:10px;transition:transform .2s}.dropdown.active .dropdown-arrow{transform:rotate(180deg)}.dropdown-menu{position:absolute;top:100%;left:0;margin-top:.25rem;background-color:var(--bg-primary);border:1px solid var(--border-color);border-radius:8px;box-shadow:0 4px 6px -1px #0000001a,0 2px 4px -1px #0000000f;min-width:200px;padding:.5rem;display:none;z-index:1000}.dropdown.active .dropdown-menu{display:block}.dropdown-item{display:flex;align-items:center;gap:.5rem;width:100%;padding:.5rem .75rem;border:none;background:none;color:var(--text-primary);text-align:left;cursor:pointer;border-radius:4px;transition:background-color .2s;font-size:14px}.dropdown-item:hover{background-color:var(--border-color)}.dropdown-separator{height:1px;background-color:var(--border-color);margin:.5rem 0}.app-title{font-size:18px;font-weight:600;color:var(--primary-color)}.main-content{flex:1;overflow:hidden;position:relative;background-color:var(--bg-color);display:flex}#mindmap-canvas{flex:1;width:100%;height:100%;cursor:grab;display:block}#mindmap-canvas.grabbing{cursor:grabbing}.status-bar{height:var(--statusbar-height);background-color:var(--surface-color);border-top:1px solid var(--border-color);display:flex;align-items:center;justify-content:space-between;padding:0 1rem;font-size:12px;color:var(--text-secondary)}.status-section{display:flex;align-items:center;gap:1rem}.modal{display:none;position:fixed;top:0;left:0;width:100%;height:100%;background-color:#00000080;justify-content:center;align-items:center;z-index:1000}.modal-content{background-color:var(--bg-color);border-radius:8px;padding:1.5rem;width:90%;max-width:400px;box-shadow:0 20px 25px -5px #0000001a,0 10px 10px -5px #0000000a}.modal-content h3{margin-bottom:1rem;color:var(--text-color)}.form-group{margin-bottom:1rem}.form-group label{display:block;margin-bottom:.25rem;font-size:14px;color:var(--text-secondary)}.form-input{width:100%;padding:.5rem;border:1px solid var(--border-color);border-radius:4px;background-color:var(--surface-color);color:var(--text-color);font-size:14px}.form-input:focus{outline:none;border-color:var(--primary-color);box-shadow:0 0 0 3px #3b82f61a}.form-row{display:flex;gap:1rem}.form-row .form-group{flex:1}.form-checkbox{display:flex;align-items:center;gap:.5rem}.form-checkbox input[type=checkbox]{width:auto;cursor:pointer}.form-checkbox label{margin-bottom:0;cursor:pointer}.modal-buttons{display:flex;gap:.5rem;justify-content:flex-end;margin-top:1.5rem}.btn{padding:.5rem 1rem;border:none;border-radius:4px;font-size:14px;cursor:pointer;transition:all .2s}.btn-primary{background-color:var(--primary-color);color:#fff}.btn-primary:hover{background-color:#2563eb}.btn-secondary{background-color:var(--border-color);color:var(--text-color)}.btn-secondary:hover{background-color:#d1d5db}.toast{position:fixed;bottom:2rem;right:2rem;padding:.75rem 1rem;border-radius:6px;color:#fff;font-size:14px;box-shadow:0 10px 15px -3px #0000001a,0 4px 6px -2px #0000000d;z-index:2000;animation:slideIn .3s ease}.toast-success{background-color:var(--success-color)}.toast-error{background-color:var(--danger-color)}.toast-info{background-color:var(--info-color)}.toast.fade-out{animation:slideOut .3s ease}@keyframes slideIn{0%{transform:translate(100%);opacity:0}to{transform:translate(0);opacity:1}}@keyframes slideOut{0%{transform:translate(0);opacity:1}to{transform:translate(100%);opacity:0}}@media (max-width: 768px){.toolbar{flex-wrap:wrap;height:auto;padding:.5rem}.toolbar-section{flex-wrap:wrap}.toolbar-btn{padding:.4rem .6rem;font-size:12px}.toolbar-btn span{font-size:14px}.app-title{font-size:16px}.status-bar{font-size:10px;flex-wrap:wrap;height:auto;padding:.5rem}.modal-content{width:95%;padding:1rem}}.loading{display:inline-block;width:20px;height:20px;border:3px solid var(--border-color);border-top-color:var(--primary-color);border-radius:50%;animation:spin .8s linear infinite}@keyframes spin{to{transform:rotate(360deg)}}::-webkit-scrollbar{width:8px;height:8px}::-webkit-scrollbar-track{background:var(--surface-color)}::-webkit-scrollbar-thumb{background:var(--border-color);border-radius:4px}::-webkit-scrollbar-thumb:hover{background:var(--text-secondary)}