:root{--bg-app: #08090d;--bg-sidebar: #0c0e14;--bg-pane: #11131c;--bg-preview: #171923;--bg-card: rgba(25, 28, 41, .65);--border: rgba(255, 255, 255, .07);--border-active: rgba(139, 92, 246, .5);--text: #f1f5f9;--text-muted: #64748b;--text-editor: #cbd5e1;--accent: #8b5cf6;--accent-gradient: linear-gradient(135deg, #8b5cf6 0%, #c084fc 100%);--accent-hover: #a78bfa;--accent-shadow: rgba(139, 92, 246, .3);--success: #10b981;--danger: #ef4444;--font-sans: "Outfit", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;--font-mono: "Fira Code", monospace;--sidebar-width: 76px;--header-height: 64px}*{box-sizing:border-box;margin:0;padding:0}body{font-family:var(--font-sans);background-color:var(--bg-app);color:var(--text);height:100vh;overflow:hidden;line-height:1.5;-webkit-font-smoothing:antialiased}#app{display:flex;flex-direction:column;height:100vh}.app-header{height:var(--header-height);background-color:var(--bg-sidebar);border-bottom:1px solid var(--border);display:flex;justify-content:space-between;align-items:center;padding:0 24px;z-index:100}.logo{display:flex;align-items:center;gap:12px}.logo-icon{width:28px;height:28px;color:var(--accent);filter:drop-shadow(0 0 8px var(--accent-shadow))}.logo-text{font-size:1.15rem;font-weight:700;letter-spacing:-.02em}.accent-text{background:var(--accent-gradient);-webkit-background-clip:text;-webkit-text-fill-color:transparent}.header-controls{display:flex;align-items:center;gap:20px}.toggle-control{display:flex;align-items:center;gap:8px;cursor:pointer;-webkit-user-select:none;user-select:none}.toggle-control input{display:none}.toggle-slider{width:42px;height:22px;background-color:#ffffff1a;border-radius:999px;position:relative;transition:background-color .2s ease;border:1px solid var(--border)}.toggle-slider:after{content:"";position:absolute;top:2px;left:2px;width:16px;height:16px;background-color:#fff;border-radius:50%;transition:transform .2s ease}.toggle-control input:checked+.toggle-slider{background-color:var(--accent);box-shadow:0 0 10px var(--accent-shadow)}.toggle-control input:checked+.toggle-slider:after{transform:translate(20px)}.toggle-label{font-size:.85rem;font-weight:500;color:var(--text-muted)}.toggle-control input:checked~.toggle-label{color:var(--text)}.main-container{flex:1;display:flex;position:relative;overflow:hidden}.sidebar-icons{width:var(--sidebar-width);background-color:var(--bg-sidebar);border-right:1px solid var(--border);display:flex;flex-direction:column;padding:16px 0;z-index:20}.sidebar-nav{display:flex;flex-direction:column;gap:12px;align-items:center}.nav-item{width:56px;height:56px;background:transparent;border:1px solid transparent;border-radius:12px;color:var(--text-muted);cursor:pointer;display:flex;flex-direction:column;justify-content:center;align-items:center;gap:4px;transition:all .2s cubic-bezier(.4,0,.2,1)}.nav-item svg{width:20px;height:20px;transition:transform .2s ease}.nav-label{font-size:.65rem;font-weight:600;text-transform:capitalize;max-width:50px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.nav-item:hover{color:var(--text);background-color:#ffffff08}.nav-item:hover svg{transform:translateY(-2px)}.nav-item.active{color:#fff;background:var(--accent-gradient);box-shadow:0 4px 15px var(--accent-shadow);border-color:var(--border-active)}.template-panel{position:absolute;top:0;left:var(--sidebar-width);width:320px;height:100%;background-color:var(--bg-pane);border-right:1px solid var(--border);z-index:15;display:flex;flex-direction:column;transform:translate(-110%);transition:transform .3s cubic-bezier(.4,0,.2,1);box-shadow:10px 0 30px #00000080}.template-panel.open{transform:translate(0)}.panel-header{display:flex;justify-content:space-between;align-items:center;padding:20px;border-bottom:1px solid var(--border)}.panel-header h3{font-size:1rem;font-weight:600}.close-panel-btn{background:transparent;border:none;color:var(--text-muted);cursor:pointer}.close-panel-btn svg{width:20px;height:20px}.close-panel-btn:hover{color:var(--text)}.panel-body{padding:20px;display:flex;flex-direction:column;gap:20px;flex:1;overflow-y:auto}.template-description{font-size:.85rem;color:var(--text-muted);line-height:1.6}.template-preview-box{background:#00000040;border:1px solid var(--border);border-radius:8px;padding:16px;display:flex;flex-direction:column;gap:12px}.preview-mini-label{font-size:.75rem;font-weight:600;color:var(--text-muted);text-transform:uppercase}.template-thumbnail{height:120px;border-radius:4px;display:flex;align-items:center;justify-content:center;overflow:hidden;background:var(--bg-sidebar)}.template-thumbnail svg{width:64px;height:64px;color:var(--text-muted);opacity:.4}.btn{font-family:var(--font-sans);font-size:.85rem;font-weight:600;padding:8px 16px;border-radius:8px;border:1px solid transparent;cursor:pointer;display:inline-flex;align-items:center;justify-content:center;gap:8px;transition:all .2s ease;-webkit-user-select:none;user-select:none}.btn-icon{width:16px;height:16px}.btn-primary{background:var(--accent-gradient);color:#fff;box-shadow:0 4px 12px var(--accent-shadow)}.btn-primary:hover{box-shadow:0 4px 18px #8b5cf680;transform:translateY(-1px)}.btn-secondary{background-color:#ffffff0d;border-color:var(--border);color:var(--text)}.btn-secondary:hover{background-color:#ffffff1a;border-color:#ffffff26}.btn-full{width:100%;padding:12px}.workspace{flex:1;display:flex;overflow:hidden;position:relative}.editor-pane,.preview-pane{display:flex;flex-direction:column;overflow:hidden;background-color:var(--bg-pane)}.editor-pane{flex:1;min-width:380px;border-right:1px solid var(--border)}.preview-pane{flex:1.3;min-width:420px;background-color:var(--bg-preview)}.pane-header{height:52px;border-bottom:1px solid var(--border);display:flex;align-items:center;justify-content:space-between;padding:0 20px;background-color:#00000026;flex-shrink:0}.pane-title{font-size:.85rem;font-weight:600;display:flex;align-items:center;gap:8px;color:var(--text-muted)}.pane-icon{width:16px;height:16px}.pane-btn-action{background:transparent;border:none;color:var(--text-muted);font-size:.75rem;font-weight:500;cursor:pointer;display:flex;align-items:center;gap:6px;padding:4px 8px;border-radius:4px;transition:all .2s ease}.pane-btn-action:hover{color:var(--text);background-color:#ffffff0d}.editor-wrapper{flex:1;overflow:hidden;position:relative}#monaco-container{width:100%;height:100%}.viewer-actions{display:flex;align-items:center;gap:16px}.zoom-controls{display:flex;align-items:center;background-color:#0003;border:1px solid var(--border);border-radius:6px;padding:2px}.viewer-btn{width:26px;height:26px;background:transparent;border:none;color:var(--text-muted);cursor:pointer;display:flex;align-items:center;justify-content:center;border-radius:4px;transition:all .15s ease}.viewer-btn svg{width:14px;height:14px}.viewer-btn:hover{color:var(--text);background-color:#ffffff0d}#zoom-level{font-size:.75rem;font-weight:600;min-width:44px;text-align:center;-webkit-user-select:none;user-select:none}.export-dropdown-wrapper{position:relative}.export-menu{position:absolute;top:calc(100% + 8px);right:0;width:220px;background-color:var(--bg-pane);border:1px solid var(--border);border-radius:12px;box-shadow:0 10px 25px #0006;padding:8px;display:none;flex-direction:column;gap:4px;z-index:110}.export-menu.show{display:flex;animation:scaleIn .15s cubic-bezier(.16,1,.3,1)}.export-item{width:100%;background:transparent;border:none;border-radius:8px;padding:8px 12px;display:flex;flex-direction:column;align-items:flex-start;cursor:pointer;transition:background-color .15s ease;color:var(--text)}.export-item:hover{background-color:#ffffff0d}.export-format{font-size:.85rem;font-weight:600}.export-desc{font-size:.7rem;color:var(--text-muted);margin-top:2px}.diagram-viewport-wrapper{flex:1;position:relative;overflow:hidden;height:calc(100% - 52px)}.diagram-viewport{width:100%;height:100%;position:relative;overflow:auto;display:flex;align-items:center;justify-content:center;padding:40px}.diagram-loading{position:absolute;top:0;left:0;right:0;bottom:0;background-color:#171923cc;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:16px;z-index:5;font-size:.85rem;color:var(--text-muted);-webkit-backdrop-filter:blur(4px);backdrop-filter:blur(4px);transition:opacity .2s ease}.spinner{width:32px;height:32px;border:3px solid rgba(139,92,246,.15);border-top-color:var(--accent);border-radius:50%;animation:spin .8s linear infinite}.diagram-empty{display:flex;flex-direction:column;align-items:center;justify-content:center;text-align:center;gap:16px;padding:24px}.empty-icon{width:64px;height:64px;color:var(--text-muted);opacity:.45}.diagram-empty h3{font-size:1.05rem;font-weight:600}.diagram-empty p{font-size:.85rem;color:var(--text-muted);line-height:1.6}.diagram-error{display:flex;background-color:#ef444414;border:1px solid rgba(239,68,68,.15);border-radius:12px;padding:20px;max-width:480px;gap:16px;box-shadow:0 8px 30px #00000040;align-items:flex-start}.error-icon{font-size:1.5rem;line-height:1}.error-details h3{font-size:.95rem;font-weight:600;color:#fca5a5;margin-bottom:6px}.error-details p{font-size:.8rem;color:var(--text-muted);line-height:1.5}.diagram-container{display:flex;align-items:center;justify-content:center;background-color:#fff;padding:20px;border-radius:8px;box-shadow:0 10px 40px #0006;border:1px solid rgba(255,255,255,.1);max-width:fit-content;max-height:fit-content}.diagram-container img{display:block;transition:width .15s ease-out,height .15s ease-out}.fallback-textarea{width:100%;height:100%;background-color:#1e1e1e;color:#cbd5e1;font-family:var(--font-mono);font-size:14px;border:none;outline:none;padding:16px;resize:none;line-height:1.5}.copyright-watermark{position:absolute;bottom:16px;right:16px;background-color:#0c0e14b3;backdrop-filter:blur(8px);-webkit-backdrop-filter:blur(8px);border:1px solid rgba(255,255,255,.08);padding:5px 10px;border-radius:6px;font-size:.7rem;font-weight:500;color:#ffffffa6;letter-spacing:.05em;z-index:10;pointer-events:none;box-shadow:0 4px 15px #0003}.hidden{display:none!important}@keyframes spin{to{transform:rotate(360deg)}}@keyframes scaleIn{0%{opacity:0;transform:scale(.95)}to{opacity:1;transform:scale(1)}}.monaco-editor{padding-top:8px}@media print{body *{visibility:hidden}.diagram-viewport-wrapper,#diagram-viewport,#diagram-container,#diagram-img{visibility:visible!important}.diagram-viewport-wrapper{position:absolute;left:0;top:0;width:100%!important;height:100%!important;padding:0!important;margin:0!important;background:#fff!important;overflow:visible!important}#diagram-viewport{position:absolute;left:0;top:0;width:100%!important;height:100%!important;padding:0!important;margin:0!important;overflow:visible!important;display:flex!important;align-items:center!important;justify-content:center!important;background:#fff!important}#diagram-container{border:none!important;box-shadow:none!important;padding:0!important;margin:0!important;background:#fff!important;max-width:100%!important;max-height:100%!important;display:flex!important;align-items:center!important;justify-content:center!important}#diagram-img{max-width:100%!important;max-height:100%!important;width:auto!important;height:auto!important;object-fit:contain!important}.copyright-watermark,.app-header,.sidebar-icons,.template-panel,.editor-pane,.pane-header,.viewer-actions,.diagram-loading,.diagram-empty,.diagram-error{display:none!important;visibility:hidden!important}}