:root{--bg: #eef1f6;--panel: #ffffff;--panel-2: #f8fafc;--border: #e2e8f0;--border-strong: #cbd5e1;--text: #0f172a;--muted: #64748b;--faint: #94a3b8;--accent: #2563eb;--accent-hover: #1d4ed8;--accent-soft: #dbeafe;--accent-text: #1e40af;--danger: #dc2626;--danger-soft: #fee2e2;--ok: #16a34a;--warn: #d97706;--error-bg: #fef2f2;--error-text: #b91c1c;--error-border: #fecaca;--shadow-sm: 0 1px 2px rgba(15, 23, 42, .06);--shadow-md: 0 4px 16px rgba(15, 23, 42, .1);--canvas-dot: #d4dae3;--radius: 8px;--font-ui: ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;--font-mono: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace}[data-theme=dark]{--bg: #0b1120;--panel: #111a2e;--panel-2: #16213a;--border: #22304a;--border-strong: #33456a;--text: #e2e8f0;--muted: #8fa3bd;--faint: #64748b;--accent: #60a5fa;--accent-hover: #93c5fd;--accent-soft: #1e3a5f;--accent-text: #bfdbfe;--danger: #f87171;--danger-soft: #451a1a;--ok: #4ade80;--warn: #fbbf24;--error-bg: #341a1e;--error-text: #fca5a5;--error-border: #5f2430;--shadow-sm: 0 1px 2px rgba(0, 0, 0, .4);--shadow-md: 0 4px 16px rgba(0, 0, 0, .5);--canvas-dot: #1e2c47}*{box-sizing:border-box}html,body,#root{height:100%}body{margin:0;font-family:var(--font-ui);font-size:14px;background:var(--bg);color:var(--text);overflow:hidden}button{font:inherit;color:inherit;background:none;border:0;padding:0;cursor:pointer}input,select,textarea{font:inherit;color:var(--text)}.app{display:flex;height:100%}.sidebar{width:248px;flex:none;display:flex;flex-direction:column;background:var(--panel);border-right:1px solid var(--border);overflow:hidden;transition:margin-left .2s ease}.sidebar.collapsed{margin-left:-248px}.sidebar-brand{display:flex;align-items:center;gap:10px;padding:14px 16px 10px}.sidebar-brand svg{flex:none}.sidebar-brand span{font-size:14px;font-weight:700;letter-spacing:-.01em;white-space:nowrap}.new-diagram-btn{display:flex;align-items:center;justify-content:center;gap:7px;margin:6px 12px 12px;padding:8px 12px;border-radius:var(--radius);background:var(--accent);color:#fff;font-weight:600;font-size:13px;box-shadow:var(--shadow-sm);transition:background .12s}[data-theme=dark] .new-diagram-btn{color:#0b1120}.new-diagram-btn:hover{background:var(--accent-hover)}.diagram-list{flex:1;overflow-y:auto;padding:0 8px 12px}.diagram-list-label{font-size:10.5px;font-weight:700;text-transform:uppercase;letter-spacing:.08em;color:var(--faint);padding:4px 10px 6px}.diagram-item{display:flex;align-items:center;width:100%;gap:4px;padding:8px 6px 8px 12px;border-radius:var(--radius);text-align:left;margin-bottom:2px;border:1px solid transparent}.diagram-item:hover{background:var(--panel-2)}.diagram-item.active{background:var(--accent-soft);border-color:color-mix(in srgb,var(--accent) 30%,transparent)}.diagram-item-body{flex:1;min-width:0}.diagram-item-title{font-size:13px;font-weight:550;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.diagram-item.active .diagram-item-title{color:var(--accent-text)}.diagram-item-time{font-size:11px;color:var(--faint);margin-top:1px}.diagram-item-delete{flex:none;display:none;align-items:center;justify-content:center;width:26px;height:26px;border-radius:6px;color:var(--faint)}.diagram-item:hover .diagram-item-delete{display:flex}.diagram-item-delete:hover{color:var(--danger);background:var(--danger-soft)}.sidebar-empty{padding:10px 12px;font-size:12.5px;color:var(--muted)}.workspace{flex:1;min-width:0;display:flex;flex-direction:column}.topbar{display:flex;align-items:center;gap:8px;padding:8px 14px 8px 10px;background:var(--panel);border-bottom:1px solid var(--border);flex:none}.icon-btn{display:inline-flex;align-items:center;justify-content:center;width:30px;height:30px;border-radius:7px;color:var(--muted);transition:background .12s,color .12s}.icon-btn:hover{background:var(--panel-2);color:var(--text)}.title-input{font-size:15px;font-weight:650;letter-spacing:-.01em;background:transparent;border:1px solid transparent;border-radius:7px;padding:4px 8px;min-width:60px;max-width:420px;width:100%}.title-input:hover{border-color:var(--border)}.title-input:focus{outline:none;border-color:var(--accent);background:var(--panel-2)}.title-wrap{flex:0 1 auto;min-width:0;display:flex}.save-status{display:inline-flex;align-items:center;gap:6px;font-size:12px;color:var(--faint);white-space:nowrap;margin-right:auto}.save-status .dot{width:7px;height:7px;border-radius:50%;background:var(--faint)}.save-status.saved .dot{background:var(--ok)}.save-status.saving .dot{background:var(--warn)}.save-status.error{color:var(--danger)}.save-status.error .dot{background:var(--danger)}.topbar-actions{display:flex;align-items:center;gap:6px}.text-btn{display:inline-flex;align-items:center;gap:6px;font-size:12.5px;font-weight:600;color:var(--muted);border:1px solid var(--border);border-radius:7px;padding:5px 11px;background:var(--panel);transition:border-color .12s,color .12s}.text-btn:hover{border-color:var(--accent);color:var(--accent)}.topbar-sep{width:1px;height:20px;background:var(--border);margin:0 4px}.theme-select{font-size:12.5px;font-weight:600;color:var(--muted);border:1px solid var(--border);border-radius:7px;padding:5px 6px;background:var(--panel);cursor:pointer;transition:border-color .12s,color .12s}.theme-select:hover{border-color:var(--accent);color:var(--accent)}.theme-select:focus{outline:none;border-color:var(--accent)}.logo-chip{display:inline-flex;align-items:center;gap:3px;border:1px solid var(--border);border-radius:7px;padding:2px 3px 2px 5px;background:var(--panel)}.logo-chip img{height:22px;max-width:64px;object-fit:contain;cursor:pointer;border-radius:4px}.logo-remove{display:inline-flex;align-items:center;justify-content:center;width:18px;height:18px;border-radius:5px;font-size:14px;line-height:1;color:var(--faint)}.logo-remove:hover{color:var(--danger);background:var(--danger-soft)}.main{flex:1;display:flex;min-height:0}.editor-panel{flex:none;min-width:220px;max-width:70vw;display:flex;flex-direction:column;background:var(--panel);border-right:1px solid var(--border)}.tabs{display:flex;gap:2px;padding:8px 10px 0;border-bottom:1px solid var(--border);flex:none}.tab{padding:7px 14px 9px;font-size:13px;font-weight:600;color:var(--muted);border-radius:7px 7px 0 0;border-bottom:2px solid transparent;margin-bottom:-1px}.tab:hover{color:var(--text)}.tab.active{color:var(--accent);border-bottom-color:var(--accent)}.code-editor{flex:1;display:flex;min-height:0;position:relative}.code-gutter{flex:none;width:40px;padding:12px 8px 12px 0;overflow:hidden;text-align:right;font-family:var(--font-mono);font-size:12.5px;line-height:1.55;color:var(--faint);background:var(--panel-2);border-right:1px solid var(--border);-webkit-user-select:none;user-select:none}.code-gutter .err{color:var(--danger);font-weight:700}.code-input{flex:1;width:100%;resize:none;border:0;outline:none;padding:12px 14px;font-family:var(--font-mono);font-size:12.5px;line-height:1.55;background:var(--panel);color:var(--text);white-space:pre;-moz-tab-size:2;tab-size:2}.errors{flex:none;max-height:110px;overflow-y:auto;font-size:12px;background:var(--error-bg);color:var(--error-text);border-top:1px solid var(--error-border);padding:4px 0}.error-line{display:block;width:100%;text-align:left;padding:3px 12px;color:inherit;font-size:12px}.error-line:hover{text-decoration:underline}.cheatsheet{flex:none;border-top:1px solid var(--border);font-size:12px;color:var(--muted)}.cheatsheet summary{padding:8px 14px;cursor:pointer;-webkit-user-select:none;user-select:none;font-weight:600}.cheatsheet pre{margin:0;padding:0 16px 12px;font-family:var(--font-mono);font-size:11.5px;line-height:1.65;overflow-x:auto;max-height:40vh;overflow-y:auto}.builder{flex:1;min-height:0;display:flex;flex-direction:column}.builder input,.builder select{font-size:13px;width:100%;padding:6px 9px;border:1px solid var(--border);border-radius:7px;background:var(--panel);color:var(--text)}.builder input:focus,.builder select:focus{outline:none;border-color:var(--accent)}.builder-steps{flex:1;min-height:0;overflow-y:auto;padding:8px}.builder-empty{padding:14px 10px;font-size:12.5px;color:var(--muted);line-height:1.5}.step-row{display:flex;align-items:center;gap:7px;padding:5px 6px;border-radius:7px;border:1px solid transparent;cursor:pointer;-webkit-user-select:none;user-select:none}.step-row:hover{background:var(--panel-2)}.step-row.selected{background:var(--accent-soft);border-color:color-mix(in srgb,var(--accent) 35%,transparent)}.step-row.has-error{background:var(--error-bg);border-color:var(--error-border)}.step-num{flex:none;min-width:18px;text-align:right;font-size:10.5px;font-variant-numeric:tabular-nums;color:var(--faint)}.step-badge{flex:none;font-size:9.5px;font-weight:700;text-transform:uppercase;letter-spacing:.04em;padding:2px 6px;border-radius:5px;min-width:34px;text-align:center}.b-msg{background:#dbeafe;color:#1e40af}.b-part{background:#dcfce7;color:#166534}.b-note{background:#fef9c3;color:#854d0e}.b-block{background:#ede9fe;color:#5b21b6}.b-life{background:#e2e8f0;color:#334155}.b-other{background:#f1f5f9;color:#64748b;border:1px solid var(--border)}.b-err{background:#fee2e2;color:#b91c1c}[data-theme=dark] .b-msg{background:#1e3a5f;color:#93c5fd}[data-theme=dark] .b-part{background:#14392374;color:#86efac}[data-theme=dark] .b-note{background:#423a14;color:#fde68a}[data-theme=dark] .b-block{background:#312a5f;color:#c4b5fd}[data-theme=dark] .b-life{background:#2b3a52;color:#cbd5e1}[data-theme=dark] .b-other{background:transparent;color:#8fa3bd}[data-theme=dark] .b-err{background:#451a1a;color:#fca5a5}.step-text{flex:1;min-width:0;font-size:12.5px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.step-row.has-error .step-text{color:var(--error-text)}.step-actions{flex:none;display:none;gap:1px}.step-row:hover .step-actions,.step-row.selected .step-actions{display:flex}.step-actions button{display:inline-flex;align-items:center;justify-content:center;width:22px;height:22px;border-radius:5px;color:var(--faint)}.step-actions button:hover{background:var(--panel);color:var(--accent);box-shadow:var(--shadow-sm)}.step-actions button.danger:hover{color:var(--danger)}.step-form{display:flex;flex-direction:column;gap:9px;padding:10px;margin:3px 0;background:var(--panel-2);border:1px solid var(--border);border-radius:9px}.field{display:flex;flex-direction:column;gap:3px;min-width:0}.field-label{font-size:11px;font-weight:650;color:var(--muted)}.field-hint{font-size:11px;color:var(--faint);line-height:1.4}.form-row{display:flex;gap:8px}.form-row .field{flex:1}.form-actions{display:flex;align-items:center;justify-content:flex-end;gap:6px}.form-actions.wrap{flex-wrap:wrap;justify-content:flex-start}.form-problem{margin-right:auto;font-size:11.5px;color:var(--warn)}.btn-primary{font-size:12.5px;font-weight:600;padding:6px 14px;border-radius:7px;background:var(--accent);color:#fff;transition:background .12s,opacity .12s}[data-theme=dark] .btn-primary{color:#0b1120}.btn-primary:hover:not(:disabled){background:var(--accent-hover)}.btn-primary:disabled{opacity:.45;cursor:default}.btn-ghost{font-size:12.5px;font-weight:600;padding:6px 11px;border-radius:7px;border:1px solid var(--border);background:var(--panel);color:var(--muted);transition:border-color .12s,color .12s}.btn-ghost:hover:not(:disabled){border-color:var(--accent);color:var(--accent)}.btn-ghost:disabled{opacity:.5;cursor:default}.builder-add{flex:none;max-height:55%;overflow-y:auto;border-top:1px solid var(--border);padding:10px 10px 12px;display:flex;flex-direction:column;gap:8px;background:var(--panel)}.add-header{display:flex;align-items:baseline;gap:8px;flex-wrap:wrap}.add-title{font-size:11px;font-weight:700;text-transform:uppercase;letter-spacing:.07em;color:var(--faint)}.add-position{display:inline-flex;align-items:center;gap:5px;flex-wrap:wrap;font-size:11px;color:var(--faint)}.builder input[type=number]{width:90px}.builder .pos-input{width:52px;padding:2px 2px 2px 8px;font-size:12px;font-variant-numeric:tabular-nums}.builder .pos-input::placeholder{color:var(--faint)}.link-btn{font-size:inherit;color:var(--accent);text-decoration:underline;text-underline-offset:2px}.segmented{display:flex;flex-wrap:wrap;gap:4px}.segmented button{font-size:12px;font-weight:600;padding:4px 10px;border-radius:6px;border:1px solid var(--border);color:var(--muted);transition:border-color .12s,color .12s,background .12s}.segmented button:hover{border-color:var(--accent);color:var(--accent)}.segmented button.active{background:var(--accent-soft);border-color:transparent;color:var(--accent-text)}.kind-hint{font-size:11.5px;color:var(--faint);line-height:1.4}.kind-hint.warn{color:var(--warn)}.splitter{width:6px;margin:0 -3px;cursor:col-resize;flex:none;z-index:5;position:relative}.splitter:after{content:"";position:absolute;top:0;right:2px;bottom:0;left:2px;background:transparent;transition:background .12s}.splitter:hover:after,.splitter.dragging:after{background:var(--accent);opacity:.5}.canvas-pane{flex:1;position:relative;min-width:0;overflow:hidden;background-color:var(--bg);background-image:radial-gradient(var(--canvas-dot) 1px,transparent 1px);background-size:22px 22px}.canvas-svg{width:100%;height:100%;display:block;cursor:grab;touch-action:none}.canvas-svg.panning{cursor:grabbing}.canvas-actions{position:absolute;top:14px;left:14px;display:flex;align-items:center;gap:8px;z-index:5}.canvas-action-btn{display:inline-flex;align-items:center;gap:6px;font-size:12.5px;font-weight:600;color:var(--muted);background:var(--panel);border:1px solid var(--border);border-radius:9px;padding:7px 13px;box-shadow:var(--shadow-md);transition:border-color .12s,color .12s}.canvas-action-btn:hover{border-color:var(--accent);color:var(--accent)}.canvas-title-input{font-size:12.5px;font-weight:600;width:220px;color:var(--text);background:var(--panel);border:1px solid var(--accent);border-radius:9px;padding:7px 12px;box-shadow:var(--shadow-md);outline:none}.canvas-title-input::placeholder{color:var(--faint);font-weight:400}.zoom-controls{position:absolute;right:16px;bottom:16px;display:flex;align-items:center;gap:2px;background:var(--panel);border:1px solid var(--border);border-radius:10px;padding:3px;box-shadow:var(--shadow-md)}.zoom-controls .icon-btn{width:28px;height:28px}.zoom-level{min-width:44px;text-align:center;font-size:12px;font-variant-numeric:tabular-nums;color:var(--muted)}.zoom-controls .fit-btn{font-size:12px;font-weight:600;color:var(--muted);padding:0 9px;height:28px;border-radius:7px}.zoom-controls .fit-btn:hover{background:var(--panel-2);color:var(--text)}.toast{position:fixed;left:50%;bottom:24px;transform:translate(-50%);background:var(--text);color:var(--bg);font-size:13px;font-weight:550;padding:9px 16px;border-radius:9px;box-shadow:var(--shadow-md);z-index:100;animation:toast-in .18s ease;pointer-events:none}@keyframes toast-in{0%{opacity:0;transform:translate(-50%,8px)}to{opacity:1;transform:translate(-50%)}}.center-screen{height:100%;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:12px;color:var(--muted)}.center-screen .retry-btn{font-weight:600;color:var(--accent);border:1px solid var(--accent);padding:6px 16px;border-radius:7px}.spinner{width:22px;height:22px;border:2.5px solid var(--border-strong);border-top-color:var(--accent);border-radius:50%;animation:spin .8s linear infinite}@keyframes spin{to{transform:rotate(360deg)}}