*,*:before,*:after{margin:0;padding:0;box-sizing:border-box}:root{--sidebar-width: 320px;--toolbar-height: 48px;--primary: #005ea2;--primary-dark: #1a4480;--primary-darker: #162e51;--primary-light: #d9e8f6;--primary-lightest: #eff6fb;--border-color: #dfe1e2;--bg-sidebar: #f0f0f0;--bg-main: #ffffff;--text-primary: #1b1b1b;--text-secondary: #565c65;--text-muted: #71767a;--heading-color: #985735;--section-border: #97b0c8;--link-color: #005ea2;--link-hover: #1a4480;--error-red: #b50909;--success-green: #2e8540;--font: "Source Sans Pro", "Public Sans", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;--font-mono: "Roboto Mono", "SF Mono", Menlo, Consolas, monospace}html,body{height:100%;font-family:var(--font);font-size:14px;color:var(--text-primary);background:var(--bg-main);line-height:1.5}#app{display:flex;flex-direction:column;height:100vh}#toolbar{height:var(--toolbar-height);border-bottom:1px solid var(--border-color);display:flex;align-items:center;padding:0 16px;gap:8px;background:var(--bg-main);flex-shrink:0}#toolbar .app-title{font-size:17px;font-weight:700;color:var(--heading-color);margin-right:20px;white-space:nowrap}#toolbar .toolbar-group{display:flex;align-items:center;gap:4px}#toolbar .toolbar-separator{width:1px;height:24px;background:var(--border-color);margin:0 10px}#toolbar .toolbar-spacer{flex:1}#toolbar .toolbar-label{font-size:12px;color:var(--text-muted);margin-right:4px;font-weight:600;text-transform:uppercase;letter-spacing:.02em}#toolbar button{padding:6px 12px;font-size:13px;font-family:var(--font);font-weight:600;border:1px solid var(--border-color);background:#fff;color:var(--text-primary);border-radius:4px;cursor:pointer;white-space:nowrap;line-height:1.4;transition:background .1s,border-color .1s}#toolbar button:hover{background:#f0f0f0;border-color:#c6cace}#toolbar button:disabled{opacity:.25;cursor:default;pointer-events:none}#toolbar button.active{background:var(--primary);color:#fff;border-color:var(--primary)}#toolbar button.active:hover{background:var(--primary-dark);border-color:var(--primary-dark)}#toolbar button.btn-secondary{background:transparent;border-color:transparent;color:var(--link-color);font-size:12px;font-weight:600;padding:4px 8px}#toolbar button.btn-secondary:hover{background:var(--primary-light);color:var(--primary-dark)}#toolbar .export-group{gap:2px}#main{display:flex;flex:1;overflow:hidden}#sidebar{width:var(--sidebar-width);min-width:var(--sidebar-width);border-right:1px solid var(--border-color);background:var(--bg-sidebar);overflow-y:auto;flex-shrink:0;transition:width .15s ease,min-width .15s ease,padding .15s ease}#sidebar.collapsed{width:0;min-width:0;overflow:hidden;padding:0;border-right:none}#sidebar section{padding:14px 16px;border-bottom:1px solid var(--border-color)}#sidebar h3{font-size:12px;font-weight:700;text-transform:uppercase;letter-spacing:.04em;color:var(--heading-color);margin-bottom:10px;padding-bottom:4px;border-bottom:2px solid var(--section-border)}#sidebar label{display:flex;align-items:center;gap:8px;font-size:13px;color:var(--text-primary);margin-bottom:8px;cursor:pointer}#sidebar label span{flex:1;min-width:0}#sidebar textarea{width:100%;min-height:90px;font-family:var(--font-mono);font-size:12px;border:1px solid var(--border-color);border-radius:4px;padding:8px 10px;resize:vertical;line-height:1.5;color:var(--text-primary);background:#fff}#sidebar textarea:focus{outline:none;border-color:var(--primary);box-shadow:0 0 0 2px var(--primary-light)}#sidebar textarea::placeholder{color:var(--text-muted)}#sidebar .input-row{display:flex;gap:8px;margin-top:8px}#sidebar button{padding:6px 14px;font-size:13px;font-family:var(--font);font-weight:600;border:1px solid var(--border-color);background:#fff;color:var(--text-primary);border-radius:4px;cursor:pointer;transition:background .1s,border-color .1s}#sidebar button:hover{background:#e8e8e8;border-color:#c6cace}#sidebar button.primary{background:var(--primary);color:#fff;border-color:var(--primary)}#sidebar button.primary:hover{background:var(--primary-dark);border-color:var(--primary-dark)}#sidebar input[type=color]{width:30px;height:24px;border:1px solid var(--border-color);border-radius:4px;padding:2px;cursor:pointer;background:#fff}#sidebar input[type=range]{width:90px;height:18px;cursor:pointer;accent-color:var(--primary)}#sidebar input[type=number]{width:56px;padding:3px 6px;font-size:12px;font-family:var(--font-mono);border:1px solid var(--border-color);border-radius:4px;text-align:right;background:#fff}#sidebar input[type=number]:focus{outline:none;border-color:var(--primary);box-shadow:0 0 0 2px var(--primary-light)}#sidebar select.sidebar-select{padding:3px 6px;font-size:12px;font-family:var(--font);border:1px solid var(--border-color);border-radius:4px;background:#fff;color:var(--text-primary);cursor:pointer}#sidebar select.sidebar-select:focus{outline:none;border-color:var(--primary);box-shadow:0 0 0 2px var(--primary-light)}#sidebar input.sidebar-text-input{padding:3px 6px;font-size:12px;font-family:var(--font);border:1px solid var(--border-color);border-radius:4px;background:#fff;color:var(--text-primary);width:120px}#sidebar input.sidebar-text-input:focus{outline:none;border-color:var(--primary);box-shadow:0 0 0 2px var(--primary-light)}#sidebar input[type=checkbox]{width:16px;height:16px;cursor:pointer;accent-color:var(--primary)}#sidebar .file-input-wrapper{margin-top:8px;position:relative}#sidebar .file-input-label{display:inline-block;padding:5px 10px;font-size:12px;color:var(--text-secondary);border:1px dashed #c6cace;border-radius:4px;cursor:pointer;width:100%;text-align:center;transition:border-color .1s,color .1s}#sidebar .file-input-label:hover{border-color:var(--primary);color:var(--primary)}#sidebar .file-input-wrapper input[type=file]{position:absolute;width:0;height:0;opacity:0;overflow:hidden}.stepper{display:inline-flex;align-items:center;border:1px solid var(--border-color);border-radius:4px;overflow:hidden}.stepper input[type=number]{width:56px;border:none;border-left:1px solid var(--border-color);border-right:1px solid var(--border-color);border-radius:0;text-align:center;padding:2px 0;font-size:12px;font-family:var(--font-mono);-moz-appearance:textfield}.stepper input[type=number]::-webkit-inner-spin-button,.stepper input[type=number]::-webkit-outer-spin-button{-webkit-appearance:none;margin:0}.stepper-btn{width:26px;height:24px;border:none!important;background:var(--bg-sidebar);color:var(--text-primary);font-size:14px;font-weight:600;cursor:pointer;display:flex;align-items:center;justify-content:center;padding:0!important;line-height:1}.stepper-btn:hover:not(:disabled){background:#e0e0e0}.dimension-row{display:flex;align-items:center;gap:8px;font-size:13px;color:var(--text-primary);margin-bottom:8px}.dimension-label{flex:1;min-width:0}#sidebar .dimension-auto{display:flex;align-items:center;gap:3px;font-size:12px;cursor:pointer;white-space:nowrap;margin-bottom:0}#sidebar .dimension-auto span{flex:none}#sidebar .dimension-auto input[type=checkbox]{margin:0}.stepper.disabled{opacity:.45;pointer-events:none}.stepper-btn:disabled{cursor:default}#sidebar .controls-separator{height:1px;background:var(--border-color);margin:10px 0}#sidebar .example-link{font-size:12px;color:var(--link-color);cursor:pointer;text-decoration:underline;margin-top:4px;display:inline-block}#sidebar .example-link:hover{color:var(--link-hover)}.opentree-search-input{width:100%;padding:6px 10px;font-size:13px;font-family:var(--font);border:1px solid var(--border-color);border-radius:4px;background:#fff;color:var(--text-primary);margin-top:4px}.opentree-search-input:focus{outline:none;border-color:var(--primary);box-shadow:0 0 0 2px var(--primary-light)}.opentree-search-input::placeholder{color:var(--text-muted)}.opentree-dropdown{display:none;border:1px solid var(--border-color);border-top:none;border-radius:0 0 4px 4px;background:#fff;max-height:180px;overflow-y:auto;box-shadow:0 4px 8px #0000001a}.opentree-dropdown-item{padding:6px 10px;font-size:12px;cursor:pointer;display:flex;align-items:center;gap:6px}.opentree-dropdown-item:hover{background:var(--primary-lightest, #eff6fb)}.opentree-badge{font-size:10px;background:var(--primary-light);color:var(--primary-dark);padding:1px 5px;border-radius:3px;font-weight:600}.opentree-selected{display:flex;flex-wrap:wrap;gap:4px;margin-top:6px}.opentree-tag{display:inline-flex;align-items:center;gap:3px;background:var(--primary-light);color:var(--primary-dark);padding:2px 6px;border-radius:3px;font-size:11px;font-weight:600}.opentree-tag-remove{cursor:pointer;font-size:13px;line-height:1;opacity:.6;margin-left:2px}.opentree-tag-remove:hover{opacity:1}#viewer{flex:1;position:relative;overflow:hidden;background:#fff}#viewer svg{display:block;width:100%;height:100%;cursor:grab;touch-action:none}#viewer svg:active{cursor:grabbing}.tree-search{position:absolute;top:10px;left:10px;z-index:10}.tree-search-input{width:180px;padding:5px 10px;font-size:12px;font-family:var(--font);border:1px solid var(--border-color);border-radius:4px;background:#fffffff2;color:var(--text-primary);box-shadow:0 1px 4px #00000014}.tree-search-input:focus{outline:none;border-color:var(--primary);box-shadow:0 0 0 2px var(--primary-light)}.tree-search-input::placeholder{color:var(--text-muted)}.tree-context-menu{position:fixed;z-index:100;background:#fff;border:1px solid var(--border-color);border-radius:4px;box-shadow:0 4px 12px #00000026;padding:4px 0;min-width:180px;font-family:var(--font)}.tree-context-menu-item{padding:6px 14px;font-size:13px;color:var(--text-primary);cursor:pointer;white-space:nowrap}.tree-context-menu-item:hover{background:var(--primary-lightest, #eff6fb);color:var(--primary-dark)}.tree-context-menu-item--danger{color:var(--error-red, #b50909)}.tree-context-menu-item--danger:hover{background:#fff3f3;color:var(--error-red, #b50909)}.tip-tooltip{position:fixed;z-index:1000;background:#fff;border:1px solid var(--border-color);border-radius:4px;padding:6px 10px;box-shadow:0 2px 8px #0000001f;font-family:var(--font);font-size:12px;color:var(--text-primary);pointer-events:none;max-width:300px}.tip-tooltip-name{font-weight:600;font-style:italic;margin-bottom:4px;font-size:13px}.tip-tooltip-row{display:flex;justify-content:space-between;gap:12px;padding:1px 0}.tip-tooltip-key{color:var(--text-muted, #71767a);white-space:nowrap}.zoom-controls{position:absolute;bottom:14px;right:14px;display:flex;flex-direction:column;gap:2px;z-index:10}.zoom-btn{width:34px;height:30px;border:1px solid var(--border-color);background:#fff;color:var(--text-primary);font-size:15px;font-family:var(--font);font-weight:600;cursor:pointer;display:flex;align-items:center;justify-content:center;border-radius:4px;box-shadow:0 1px 4px #0000001a;-webkit-user-select:none;user-select:none;transition:background .1s}.zoom-btn:hover{background:#f0f0f0}.zoom-btn:last-child{font-size:11px}.tree-stats{position:absolute;bottom:14px;left:14px;font-size:12px;color:var(--text-muted);background:#ffffffe6;padding:3px 10px;border-radius:4px;border:1px solid var(--border-color);pointer-events:none;z-index:5}.drag-over{outline:2px dashed var(--primary)!important;outline-offset:-4px}button:focus-visible,input:focus-visible,textarea:focus-visible{outline:2px solid #2491ff;outline-offset:2px}.viewer-message{position:absolute;top:50%;left:50%;transform:translate(-50%,-50%);text-align:center;color:var(--text-muted);font-size:15px;line-height:1.7;pointer-events:none}.viewer-message .hint{font-size:13px;margin-top:8px}.error-message{background:#fef2f2;border:1px solid #f3c7c7;border-left:4px solid var(--error-red);color:#b50909;padding:8px 12px;border-radius:4px;font-size:12px;margin-top:8px;word-break:break-word;line-height:1.5}.toast{position:fixed;bottom:24px;left:50%;transform:translate(-50%);background:var(--text-primary);color:#fff;padding:10px 20px;border-radius:4px;font-size:13px;font-weight:600;z-index:1000;animation:toast-fade 2.5s ease-in-out forwards;box-shadow:0 2px 8px #0003}@keyframes toast-fade{0%{opacity:0;transform:translate(-50%) translateY(10px)}12%{opacity:1;transform:translate(-50%) translateY(0)}85%{opacity:1;transform:translate(-50%) translateY(0)}to{opacity:0;transform:translate(-50%) translateY(0)}}@media (max-width: 1024px) and (min-width: 769px){:root{--sidebar-width: 260px}}@media (max-width: 768px){:root{--toolbar-height: 42px}#toolbar{height:auto;min-height:var(--toolbar-height);flex-wrap:wrap;padding:4px 8px;gap:4px}#toolbar .app-title{font-size:14px;margin-right:8px}#toolbar button{padding:4px 8px;font-size:12px}#toolbar .toolbar-spacer{flex-basis:100%;height:0}#toolbar .toolbar-separator,#toolbar .toolbar-label{display:none}#main{flex-direction:column}#sidebar{width:100%;min-width:100%;max-height:40vh;border-right:none;border-bottom:1px solid var(--border-color);order:1}#sidebar.collapsed{width:100%;min-width:100%;max-height:0;overflow:hidden;border-bottom:none}#viewer{order:0;min-height:50vh}#sidebar section{padding:10px 12px}#sidebar h3{font-size:11px;margin-bottom:6px}#sidebar textarea{min-height:60px;font-size:11px}#sidebar label{font-size:12px;margin-bottom:6px}.zoom-controls{bottom:10px;right:10px}.zoom-btn{width:36px;height:32px}.tree-search{top:8px;left:8px;right:60px}.tree-search-input{width:100%;font-size:14px;padding:6px 10px}.tree-stats{bottom:10px;left:10px;font-size:10px}.tree-context-menu-item{padding:10px 16px;font-size:14px}}@media (max-width: 480px){#toolbar .app-title{font-size:13px;margin-right:4px}#toolbar button{padding:4px 6px;font-size:11px}#sidebar{max-height:45vh}#viewer{min-height:45vh}}body.dark-mode{--border-color: #3a3a3a;--bg-sidebar: #1a1a1a;--bg-main: #0f0f0f;--text-primary: #e0e0e0;--text-secondary: #a0a0a0;--text-muted: #7a7a7a;--primary: #4a9eff;--primary-dark: #6cb0ff;--primary-darker: #8ec1ff;--primary-light: #1e2a3a;--primary-lightest: #152030;--heading-color: #d9a77c;--section-border: #4a6278;--link-color: #4a9eff;--link-hover: #6cb0ff}body.dark-mode #toolbar button{background:#2a2a2a;border-color:var(--border-color);color:var(--text-primary)}body.dark-mode #toolbar button:hover{background:#3a3a3a;border-color:#555}body.dark-mode #toolbar button.active{background:var(--primary);color:#0f0f0f;border-color:var(--primary)}body.dark-mode #toolbar button.btn-secondary{background:transparent;border-color:transparent}body.dark-mode #toolbar button.btn-secondary:hover{background:var(--primary-light)}body.dark-mode #sidebar textarea,body.dark-mode #sidebar input[type=text],body.dark-mode #sidebar input[type=number],body.dark-mode #sidebar select.sidebar-select,body.dark-mode .opentree-search-input{background:#1f1f1f;color:var(--text-primary);border-color:var(--border-color)}body.dark-mode #sidebar textarea::placeholder,body.dark-mode .opentree-search-input::placeholder{color:var(--text-muted)}body.dark-mode #sidebar button{background:#2a2a2a;color:var(--text-primary);border-color:var(--border-color)}body.dark-mode #sidebar button:hover{background:#3a3a3a;border-color:#555}body.dark-mode #sidebar button.primary{background:var(--primary);color:#0f0f0f;border-color:var(--primary)}body.dark-mode #sidebar input[type=color]{background:#1f1f1f;border-color:var(--border-color)}body.dark-mode #sidebar .file-input-label{color:var(--text-secondary);border-color:#555}body.dark-mode #sidebar .file-input-label:hover{border-color:var(--primary);color:var(--primary)}body.dark-mode .stepper,body.dark-mode .stepper input[type=number]{border-color:var(--border-color)}body.dark-mode .stepper-btn{background:#2a2a2a;color:var(--text-primary)}body.dark-mode .stepper-btn:hover:not(:disabled){background:#3a3a3a}body.dark-mode .opentree-dropdown{background:#1f1f1f;border-color:var(--border-color);box-shadow:0 4px 8px #00000080}body.dark-mode .opentree-dropdown-item:hover{background:var(--primary-light)}body.dark-mode .opentree-tag{background:var(--primary-light);color:var(--primary-dark)}body.dark-mode #viewer{background:#0f0f0f}body.dark-mode .zoom-btn{background:#2a2a2a;color:var(--text-primary);border-color:var(--border-color);box-shadow:0 1px 4px #0006}body.dark-mode .zoom-btn:hover{background:#3a3a3a}body.dark-mode .tree-search-input{background:#1e1e1ef2;color:var(--text-primary);border-color:var(--border-color);box-shadow:0 1px 4px #0000004d}body.dark-mode .tree-stats{background:#1e1e1ee6;color:var(--text-muted);border-color:var(--border-color)}body.dark-mode .tree-context-menu{background:#1f1f1f;border-color:var(--border-color);box-shadow:0 4px 12px #00000080}body.dark-mode .tree-context-menu-item{color:var(--text-primary)}body.dark-mode .tree-context-menu-item:hover{background:var(--primary-light);color:var(--primary-dark)}body.dark-mode .tree-context-menu-item--danger{color:#ff8080}body.dark-mode .tree-context-menu-item--danger:hover{background:#3a1010;color:#ff8080}body.dark-mode .tip-tooltip{background:#1f1f1f;color:var(--text-primary);border-color:var(--border-color);box-shadow:0 2px 8px #0006}body.dark-mode .toast{background:#2a2a2a;color:var(--text-primary);box-shadow:0 2px 8px #00000080}body.dark-mode .error-message{background:#2a1515;border-color:#6a2a2a;color:#ff8080}body.dark-mode .embed-open-btn{background:#1e1e1eb3;border-color:#ffffff26;color:#e0e0e0}body.dark-mode .embed-open-btn:hover{background:#1e1e1ef2}.embed-mode #app,.embed-mode #main{height:100vh}.embed-mode #viewer{width:100%;height:100%}.embed-open-btn{position:absolute;top:8px;right:8px;z-index:10;width:28px;height:28px;display:flex;align-items:center;justify-content:center;background:#ffffffb3;border:1px solid rgba(0,0,0,.1);border-radius:4px;font-size:16px;color:#333;text-decoration:none;cursor:pointer;opacity:.5;transition:opacity .15s}.embed-open-btn:hover{opacity:1;background:#fffffff2}