:root{--bg: #f4f6f9;--panel: #ffffff;--border: #d3d9e3;--accent: #3a5a86;--accent-hover: #2c466b;--text: #1d2733;--muted: #6a7585;--danger: #b23a3a}*{box-sizing:border-box}body{margin:0;font-family:Segoe UI,Tahoma,Arial,sans-serif;color:var(--text);background:var(--bg);height:100vh;overflow:hidden}#app{height:100vh}button{font:inherit;cursor:pointer;border:1px solid var(--border);border-radius:5px;background:#eef1f6;padding:7px 14px;color:var(--text)}button:hover{background:#e2e7ef}button.primary{background:var(--accent);color:#fff;border-color:var(--accent)}button.primary:hover{background:var(--accent-hover)}button.danger{color:var(--danger)}input{font:inherit;padding:9px 11px;border:1px solid var(--border);border-radius:5px;width:100%}.auth-wrap{display:flex;align-items:center;justify-content:center;height:100vh}.auth-card{background:var(--panel);border:1px solid var(--border);border-radius:10px;padding:32px;width:360px;box-shadow:0 8px 30px #0000000f}.auth-card h1{margin:0 0 4px;font-size:24px}.auth-card .sub{color:var(--muted);margin:0 0 22px;font-size:14px}.auth-card label{display:block;font-size:13px;margin:14px 0 5px;color:var(--muted)}.auth-card button{width:100%;margin-top:20px}.auth-card .switch{margin-top:16px;text-align:center;font-size:14px}.auth-card a{color:var(--accent);cursor:pointer}.form-error{color:var(--danger);font-size:14px;margin-top:14px;min-height:18px}.app-shell{display:flex;flex-direction:column;height:100vh}.topbar{display:flex;align-items:center;gap:12px;padding:10px 16px;background:var(--panel);border-bottom:1px solid var(--border)}.topbar .brand{font-weight:700;font-size:18px;color:var(--accent)}.app-shell.no-sidebar .sidebar,.panes.no-code #leftPane{display:none}.topbar .app-version{font-size:11px;color:var(--muted);font-family:SF Mono,Menlo,Consolas,monospace;background:#eef1f6;padding:2px 7px;border-radius:5px}.topbar .spacer{flex:1}.topbar .user-email{color:var(--muted);font-size:14px}.workarea{display:flex;flex:1;min-height:0}.sidebar{flex:0 0 240px;width:240px;background:var(--panel);border-right:1px solid var(--border);display:flex;flex-direction:column;min-height:0}.sidebar .sb-head{display:flex;gap:8px;padding:12px;border-bottom:1px solid var(--border)}.sidebar .sb-head button{flex:1}.sb-section{font-size:11px;text-transform:uppercase;letter-spacing:.04em;color:var(--muted);padding:10px 12px 4px;font-weight:600}.sb-section.sb-section-row{display:flex;align-items:center;justify-content:space-between;gap:8px}.sort-select{text-transform:none;letter-spacing:0;font-weight:400;font-size:11px;padding:2px 4px;border:1px solid var(--border);border-radius:4px;background:#fff;color:var(--text);cursor:pointer}.diagram-list{list-style:none;margin:0;padding:6px;overflow:auto;flex:1}.diagram-list.examples{flex:0 0 auto;max-height:38%;border-bottom:1px solid var(--border)}.diagram-list li{padding:9px 10px;border-radius:6px;cursor:pointer;display:flex;align-items:center;gap:6px;font-size:14px}.diagram-list li:hover{background:#eef1f6}.diagram-list li.active{background:#dfe7f3;font-weight:600}.diagram-list li .title{flex:1;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}#diagramList li{width:max-content;min-width:100%;box-sizing:border-box}#diagramList li .title{flex:0 0 auto;overflow:visible;text-overflow:clip}#diagramList li .row-date{flex:0 0 auto;margin-left:auto;padding-left:10px;color:var(--muted);font-size:11px;font-variant-numeric:tabular-nums}.diagram-list li .row-menu{opacity:0;border:none;background:none;color:var(--muted);padding:0 6px;font-size:18px;line-height:1;border-radius:5px;cursor:pointer}.diagram-list li:hover .row-menu,.diagram-list li.active .row-menu{opacity:1}.diagram-list li .row-menu:hover{background:#d7dfeb;color:var(--text)}.modal-overlay{position:fixed;top:0;right:0;bottom:0;left:0;background:#141c286b;display:flex;align-items:center;justify-content:center;z-index:2000}.modal{background:#fff;border:1px solid var(--border);border-radius:10px;padding:24px 26px;max-width:420px;box-shadow:0 16px 48px #00000038}.modal-msg{margin:0 0 20px;font-size:15px;line-height:1.5}.modal-actions{display:flex;justify-content:flex-end;gap:10px}.row-dropdown{position:fixed;z-index:1000;min-width:168px;background:#fff;border:1px solid var(--border);border-radius:8px;box-shadow:0 8px 24px #00000024;padding:5px;display:flex;flex-direction:column}.row-dropdown[hidden]{display:none}.row-dropdown button{text-align:left;border:none;background:none;padding:8px 10px;border-radius:6px;font-size:14px;cursor:pointer;color:var(--text)}.row-dropdown button:hover{background:#eef1f6}.row-dropdown button.danger{color:var(--danger)}.row-dropdown button.danger:hover{background:#fbeaea}.diagram-list .empty{color:var(--muted);padding:14px 10px;font-size:13px}.editor-area{display:flex;flex:1;min-width:0;flex-direction:column}.editor-toolbar{display:flex;gap:10px;align-items:center;padding:8px 14px;border-bottom:1px solid var(--border);background:linear-gradient(180deg,#fff,#f7f9fb);flex-wrap:wrap}.editor-toolbar .title-input{flex:1 1 380px;min-width:220px;max-width:560px;padding:7px 10px;font-weight:600;border-color:transparent;background:#f1f4f8}.editor-toolbar .title-input:focus{border-color:var(--accent);background:#fff;outline:none}.lock-btn{flex:0 0 auto;border:1px solid var(--border);background:#eef1f6;border-radius:6px;padding:5px 9px;font-size:15px;line-height:1;cursor:pointer}.lock-btn.locked{background:#fde8c8;border-color:#d9a441}.editor-area.locked textarea{background:#fafbfc;color:#44505f}.editor-area.locked .title-input{background:#f0f2f5}.editor-toolbar .spacer{flex:1}.editor-toolbar .save-state{font-size:12.5px;color:var(--muted);white-space:nowrap;min-width:88px}.zoom-control{display:inline-flex;align-items:center;gap:5px}.zoom-control input[type=range]{width:110px;margin:0;accent-color:var(--accent);cursor:pointer}.zoom-arrow{border:1px solid var(--border);background:#eef1f6;border-radius:5px;padding:2px 6px;font-size:11px;line-height:1;color:var(--text)}.zoom-arrow:hover{background:#e2e7ef}.zoom-pct{font-size:12px;color:var(--muted);min-width:42px;text-align:right;font-variant-numeric:tabular-nums}.toolbar-group{display:inline-flex;align-items:center;gap:4px}.toolbar-group.exports{gap:6px}.editor-toolbar .divider{width:1px;height:22px;background:var(--border)}.panes{display:flex;flex:1;min-height:0}.pane{display:flex;flex-direction:column;min-width:120px;overflow:hidden}#leftPane{flex:0 0 42%}#rightPane{flex:1 1 auto}.editor-wrap{flex:1;display:flex;min-height:0;overflow:hidden}.editor-gutter{flex:0 0 auto;box-sizing:border-box;padding:14px 8px 14px 12px;text-align:right;background:#eef1f6;color:#9aa4b2;border-right:1px solid var(--border);font-family:SF Mono,Menlo,Consolas,monospace;font-size:13.5px;line-height:1.5;white-space:pre;overflow:hidden;-webkit-user-select:none;user-select:none}.pane textarea{flex:1;border:none;padding:14px;font-family:SF Mono,Menlo,Consolas,monospace;font-size:13.5px;resize:none;outline:none;line-height:1.5;white-space:pre;overflow:auto}#output{flex:1;overflow:auto;background:#fff;padding:0 16px 16px;position:relative}.ll-sticky{position:sticky;top:0;height:0;z-index:5;overflow:visible;pointer-events:none}.ll-sticky svg{display:block;background:#fff;box-shadow:0 3px 6px #0000001f}#output.fit-width svg{width:100%!important;max-width:100%!important;height:auto!important}.resizer{position:relative;flex:0 0 6px;cursor:col-resize;background:var(--border)}.resizer:hover,.resizer.active{background:var(--accent)}body.resizing{cursor:col-resize;-webkit-user-select:none;user-select:none}.collapse-btn{position:absolute;top:12px;left:50%;transform:translate(-50%);width:16px;height:26px;display:flex;align-items:center;justify-content:center;padding:0;border:1px solid var(--border);background:#fff;border-radius:4px;font-size:14px;line-height:1;color:var(--muted);cursor:pointer;z-index:6}.collapse-btn:hover{background:#eef1f6;color:var(--text);border-color:var(--accent)}.app-shell.no-sidebar #sidebarResizer,.panes.no-code #resizer{flex-basis:16px;cursor:pointer}.app-shell.no-sidebar #sidebarResizer:hover,.panes.no-code #resizer:hover{background:#c2ccda}.error{color:var(--danger);white-space:pre-wrap;font-family:monospace;font-size:13px}.toggle{display:inline-flex;align-items:center;gap:6px;white-space:nowrap;font-size:13px;color:var(--text);padding:5px 9px;border-radius:6px;cursor:pointer;-webkit-user-select:none;user-select:none;transition:background .12s}.toggle:hover{background:#eaeef4}.toggle input{width:15px;height:15px;margin:0;accent-color:var(--accent);cursor:pointer}.btn-export{padding:6px 12px;font-size:13px;font-weight:500}