:root{--color-bg: #0a0a0a;--color-surface: #1a1a1a;--color-border: #2a2a2a;--color-text: #e0e0e0;--color-text-muted: #808080;--space-1: 4px;--space-2: 8px;--space-3: 12px;--space-4: 16px}*{box-sizing:border-box;margin:0;padding:0}body{font-family:system-ui,-apple-system,sans-serif;background:var(--color-bg);color:var(--color-text)}.app{display:flex;flex-direction:column;height:100vh}.app__header{padding:var(--space-3) var(--space-4);border-bottom:1px solid var(--color-border);font-weight:600}.app__main{flex:1;overflow:hidden}.space{width:100%;height:100%;overflow:hidden;position:relative;cursor:grab}.space:active{cursor:grabbing}.space__viewport{transform-origin:0 0}.tile{background:var(--color-surface);border:1px solid var(--color-border);border-radius:var(--space-1);min-width:200px;cursor:move}.tile__content{padding:var(--space-2)}.bloc__editor{width:100%;min-height:100px;background:transparent;border:none;color:var(--color-text);font-family:inherit;font-size:inherit;resize:vertical}.bloc__editor:focus{outline:none}.node--system,.node--unknown,.node--space-ref{color:var(--color-text-muted);font-size:.875rem}