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#ccc;border-radius:4px;font-size:14px;font-family:inherit;resize:vertical;box-sizing:border-box}#diagramframe{width:100%;height:100%;background:transparent;border-radius:inherit;display:flex;align-items:center;justify-content:center;position:relative;overflow:hidden;box-sizing:border-box}#diagramframe .visualization-container{max-width:100%;max-height:100%;width:100%;height:100%;display:flex;align-items:center;justify-content:center}#diagramframe .visualization-container svg{max-width:100%;max-height:100%;width:auto;height:auto}#mergeMenu{margin-bottom:16px;background:var(--right-column-background, linear-gradient(135deg, #f7fafc 0%, #edf2f7 100%));border:1px solid var(--border-color, rgba(226, 232, 240, .8));border-radius:12px;box-shadow:var(--box-shadow, 0 2px 4px rgba(0, 0, 0, .06));overflow:hidden}.mode-tabs{display:flex;background:var(--content-background, #ffffff);border-radius:12px 12px 0 0}.mode-tab{flex:1;padding:16px 20px;background:transparent;border:none;cursor:pointer;font-size:15px;font-weight:500;color:var(--secondary-text, #718096);transition:all .2s ease;border-bottom:2px solid transparent;position:relative}.mode-tab:hover{background:var(--content-background, #f7fafc);color:var(--primary-text, #2d3748)}.mode-tab.active{background:var(--content-background, #ffffff);color:var(--accent, #3182ce);border-bottom-color:var(--accent, #3182ce);font-weight:600}.mode-tab.active:after{content:"";position:absolute;bottom:-1px;left:0;right:0;height:2px;background:var(--accent, #3182ce)}#mergeMenu span,#mergeMenu input[type=radio]{display:none}#contentinfo{margin-top:40px;padding:24px 0;text-align:center;color:var(--secondary-text, #718096);font-size:14px;border-top:1px solid var(--border-color, rgba(226, 232, 240, .8))}@media (max-width: 1200px){.body{padding:0 16px}#content{margin:16px auto;padding:16px;width:calc(100vw - 32px);min-width:unset}#contentContainer{flex-direction:column;gap:20px}#leftColumn{max-width:none}#rightColumn{position:static;max-height:none;width:100%;padding:20px}}@media (max-width: 768px){body{font-size:14px}#content{margin:12px;padding:12px;border-radius:12px;width:calc(100vw - 24px)}#mergeMenu{padding:12px;margin-bottom:12px}#mergeMenu span{flex-direction:column;gap:12px;align-items:flex-start}#diagramframe{min-height:350px;padding:12px}#rightColumn{padding:16px}}@media (max-width: 480px){.body{padding:0 4px}#content{margin:2px;padding:6px;max-width:calc(100vw - 4px)}#rightColumn{padding:8px}}@media (prefers-reduced-motion: reduce){*{animation-duration:.01ms!important;animation-iteration-count:1!important;transition-duration:.01ms!important}}@supports selector(:focus-visible){*:focus{outline:none}*:focus-visible{outline:2px solid var(--focus-border, #3182ce);outline-offset:2px;border-radius:4px}}@media print{header,nav,#rightColumn{display:none}#content{box-shadow:none;border:1px solid #ccc;margin:0;max-width:none;background:#fff!important}#leftColumn{width:100%}}.content-panel{background:var(--content-background, linear-gradient(135deg, #ffffff 0%, #f7fafc 100%));margin:20px auto;padding:0;width:95%;max-width:1500px;min-width:1000px;border-radius:16px;box-shadow:var(--box-shadow, 0 4px 6px -1px rgba(0, 0, 0, .1), 0 2px 4px -1px rgba(0, 0, 0, .06));border:1px solid #bbbbbb;position:relative;overflow:hidden;min-height:600px}.content-panel-header{display:flex;justify-content:space-between;align-items:center;padding:24px 30px 0;margin-top:8px}.content-panel-title{color:var(--primary-text, #2d3748);font-weight:600;font-size:1.875rem;margin:0}.content-panel-close{background:none;border:none;font-size:32px;color:var(--secondary-text, #718096);cursor:pointer;padding:0;width:40px;height:40px;display:flex;align-items:center;justify-content:center;border-radius:8px;transition:all .2s ease}.content-panel-close:hover{background:var(--hover-background, rgba(226, 232, 240, .3));color:var(--primary-text, #2d3748)}.content-panel-body{padding:20px 30px 30px;color:var(--secondary-text, #4a5568);line-height:1.6}.content-heading{color:var(--primary-text, #2d3748);font-weight:600;margin-top:24px;margin-bottom:12px;font-size:1.25rem}.content-heading:first-child{margin-top:0}.highlight{color:var(--accent, #e53e3e);font-weight:600}.content-link{color:var(--link-color, #3182ce);text-decoration:none;transition:color .2s ease}.content-link:hover{color:var(--link-hover-color, #2c5282);text-decoration:underline}.content-panel ul{margin-left:20px;margin-bottom:16px}.content-panel li{margin-bottom:8px}.content-panel p{margin-bottom:16px;font-size:16px}.theme-selector{margin-top:20px;padding:16px;background:var(--theme-selector-background, #f8f9fa);border:1px solid var(--border-color, rgba(226, 232, 240, .8));border-radius:8px}.theme-selector-title{font-size:14px;font-weight:600;color:var(--primary-text, #2d3748);margin-bottom:12px}.theme-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(120px,1fr));gap:8px}.theme-option{padding:8px 12px;background:var(--theme-option-background, #ffffff);border:2px solid var(--border-color, rgba(226, 232, 240, .8));border-radius:6px;cursor:pointer;font-size:12px;font-weight:500;text-align:center;transition:all .2s ease}.theme-option:hover{border-color:var(--accent, #3182ce)}.theme-option.active{border-color:var(--accent, #3182ce);background:var(--accent-light, rgba(49, 130, 206, .1));color:var(--accent, #3182ce)}@media (max-width: 1400px){#content{width:98%;max-width:1300px;padding:20px}#rightColumn{width:360px}}@media (max-width: 1200px){#content{margin:16px auto;padding:16px;width:calc(100vw - 32px);min-width:unset}#contentContainer{flex-direction:column;gap:20px}#leftColumn{max-width:none}#rightColumn{position:static;max-height:none;width:100%;padding:20px}.content-panel{width:calc(100vw - 32px);min-width:unset;margin:16px auto}.content-panel-header,.content-panel-body{padding-left:20px;padding-right:20px}.mode-controls-content{flex-wrap:wrap;gap:12px}.mode-controls-input{min-width:150px;max-width:300px}}@media (max-width: 768px){body{font-size:14px}#content{margin:12px;padding:12px;border-radius:12px;width:calc(100vw - 24px)}.mode-controls-content{flex-direction:column;align-items:stretch;gap:12px}.mode-controls-label{min-width:auto}.mode-controls-input{min-width:0;max-width:none}#diagramframe{min-height:350px;padding:12px}#rightColumn{padding:16px}.content-panel{margin:12px;border-radius:12px;width:calc(100vw - 24px)}.content-panel-header,.content-panel-body{padding-left:16px;padding-right:16px}.content-panel-title{font-size:1.5rem}.control-group{flex-direction:column;align-items:stretch;gap:8px}.control-label{min-width:auto}}@media (max-width: 480px){#content{margin:2px;padding:6px;max-width:calc(100vw - 4px)}#rightColumn{padding:8px}.navigation-controls{flex-wrap:wrap;gap:8px}.nav-button{min-width:60px;padding:6px 8px}}@media print{header,nav,#rightColumn,.content-panel-header{display:none}#content,.content-panel{box-shadow:none;border:1px solid #ccc;margin:0;max-width:none;background:#fff!important}#leftColumn{width:100%}}@media (prefers-color-scheme: dark){:root{--text-primary: #f7fafc;--text-secondary: #e2e8f0;--background-body: linear-gradient(135deg, #1a202c 0%, #2d3748 100%);--background-content: linear-gradient(135deg, #2d3748 0%, #4a5568 100%);--border-color: rgba(113, 128, 150, .3)}}.body{max-width:none;margin:0;padding:0;width:auto}#banner,.legacy-header,.legacy-nav{display:none!important}.color-palette-selector{margin-bottom:16px}.palette-label{display:block;font-size:14px;font-weight:600;color:var(--primary-text, #2d3748);margin-bottom:8px}.palette-controls{display:flex;gap:12px;align-items:center}.palette-dropdown{position:relative;flex:1}.palette-current{display:flex;align-items:center;gap:8px;width:100%;padding:8px 12px;border:1px solid var(--border-color, #d1d5db);border-radius:6px;background:var(--surface, #ffffff);cursor:pointer;font-size:13px;transition:all .2s ease}.palette-current:hover{border-color:var(--accent, #3182ce)}.palette-preview{display:flex;gap:2px}.palette-color-square{width:14px;height:14px;border-radius:2px;border:1px solid rgba(0,0,0,.1)}.palette-name{flex:1;text-align:left;font-weight:500}.dropdown-arrow{font-size:10px;color:var(--secondary-text, #718096)}.palette-dropdown-menu{position:absolute;top:100%;left:0;right:0;z-index:100;background:var(--surface, #ffffff);border:1px solid var(--border-color, #d1d5db);border-radius:6px;box-shadow:0 4px 12px #00000026;margin-top:2px;max-height:200px;overflow-y:auto}.palette-option{display:flex;align-items:center;gap:8px;width:100%;padding:10px 12px;border:none;background:transparent;cursor:pointer;font-size:13px;transition:all .2s ease;text-align:left}.palette-option:hover{background:var(--hover-background, rgba(226, 232, 240, .3))}.palette-option.selected{background:var(--primary-alpha, rgba(49, 130, 206, .1));color:var(--accent, #3182ce)}.shuffle-button{background:var(--accent, #3182ce);color:#fff;border:none;padding:8px 12px;border-radius:6px;cursor:pointer;font-size:13px;font-weight:500;transition:all .2s ease;white-space:nowrap}.shuffle-button:hover{background:var(--accent-dark, #2c5282);transform:translateY(-1px)}.shuffle-button:active{transform:translateY(0)}@media (max-width: 768px){.palette-controls{flex-direction:column;align-items:stretch;gap:8px}.shuffle-button{width:100%}}