*,*:before,*:after{box-sizing:border-box;margin:0;padding:0}:root{--sidebar-expanded: 240px;--sidebar-collapsed: 60px;--controls-expanded: 260px;--bg: #0f1117;--sidebar-bg: #161b22;--border: #30363d;--accent: #58a6ff;--text: #e6edf3;--text-muted: #8b949e;--transition: .25s ease;font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,sans-serif;text-rendering:optimizeLegibility;-webkit-font-smoothing:antialiased}html,body{height:100%;background:var(--bg);color:var(--text)}a{color:var(--accent);text-decoration:none}a:hover{text-decoration:underline}#layout{display:flex;min-height:100vh}#sidebar{position:sticky;top:0;height:100vh;width:var(--sidebar-expanded);background:var(--sidebar-bg);border-right:1px solid var(--border);display:flex;flex-direction:column;transition:width var(--transition);overflow:hidden;flex-shrink:0;z-index:100}#sidebar.collapsed{width:var(--sidebar-collapsed)}#sidebar-toggle{display:flex;align-items:center;justify-content:center;width:100%;height:56px;background:transparent;border:none;border-bottom:1px solid var(--border);border-radius:0;color:var(--text-muted);cursor:pointer;flex-shrink:0;padding:0;transition:color var(--transition),background var(--transition)}#sidebar-toggle:hover{color:var(--text);background:#ffffff0d}#sidebar-toggle:focus-visible{outline:2px solid var(--accent);outline-offset:-2px}.toggle-icon{width:20px;height:20px;flex-shrink:0;transition:transform var(--transition)}#sidebar.collapsed .toggle-icon{transform:rotate(180deg)}.nav-links{list-style:none;padding:12px 0;flex:1;overflow:hidden}.nav-links li+li{margin-top:2px}.nav-link{display:flex;align-items:center;gap:12px;padding:10px 16px;margin:0 8px;color:var(--text-muted);text-decoration:none;border-radius:6px;white-space:nowrap;transition:background var(--transition),color var(--transition)}.nav-link:hover,.nav-link.active{background:#58a6ff1a;color:var(--accent);text-decoration:none}.nav-icon{width:20px;height:20px;flex-shrink:0}.nav-label{font-size:.9rem;font-weight:500;opacity:1;transition:opacity var(--transition)}#sidebar.collapsed .nav-label{opacity:0;pointer-events:none}#content{flex:1;padding:48px;max-width:840px}h1{font-size:2rem;font-weight:700;margin-bottom:16px;color:var(--text);line-height:1.3}h2{font-size:1.3rem;font-weight:600;margin:40px 0 10px;color:var(--text)}p{font-size:1rem;line-height:1.75;color:var(--text-muted);margin-bottom:14px}#renderer{flex:1;position:relative;overflow:hidden;height:100vh}#atlas-canvas{position:absolute;inset:5px 0;width:100%;height:calc(100% - 10px);background:#000;display:block}#controls-panel{position:sticky;top:0;height:100vh;width:var(--controls-expanded);background:var(--sidebar-bg);border-left:1px solid var(--border);display:flex;flex-direction:column;transition:width var(--transition);overflow:hidden;flex-shrink:0;z-index:100}#controls-panel.collapsed{width:var(--sidebar-collapsed)}#controls-toggle{display:flex;align-items:center;justify-content:center;width:100%;height:56px;background:transparent;border:none;border-bottom:1px solid var(--border);border-radius:0;color:var(--text-muted);cursor:pointer;flex-shrink:0;padding:0;transition:color var(--transition),background var(--transition)}#controls-toggle:hover{color:var(--text);background:#ffffff0d}#controls-toggle:focus-visible{outline:2px solid var(--accent);outline-offset:-2px}.controls-toggle-icon{width:20px;height:20px;flex-shrink:0;transition:transform var(--transition)}#controls-panel.collapsed .controls-toggle-icon{transform:rotate(180deg)}.controls-content{padding:16px;overflow-y:auto;overflow-x:hidden;flex:1;display:flex;flex-direction:column;gap:20px;transition:opacity var(--transition)}#controls-panel.collapsed .controls-content{opacity:0;pointer-events:none}.control-group{display:flex;flex-direction:column;gap:8px}.control-label,.control-group>label:first-child{font-size:.75rem;font-weight:600;letter-spacing:.06em;text-transform:uppercase;color:var(--text-muted)}.control-group input[type=file]{font-size:.8rem;color:var(--text);max-width:100%}.control-group button{display:block;width:100%;padding:8px 12px;background:#58a6ff14;border:1px solid rgba(88,166,255,.25);border-radius:6px;color:var(--accent);font-size:.85rem;font-weight:500;cursor:pointer;transition:background var(--transition),border-color var(--transition);white-space:nowrap}.control-group button:hover{background:#58a6ff2e;border-color:#58a6ff80}.range-label{display:flex;flex-direction:column;gap:6px;font-size:.75rem;font-weight:600;letter-spacing:.06em;text-transform:uppercase;color:var(--text-muted)}.range-label input[type=range]{width:100%;accent-color:var(--accent)}#atlas-status{font-size:.8rem;color:var(--text-muted);font-style:italic;line-height:1.5;margin:0}.placeholder-badge{display:inline-block;font-size:.75rem;font-weight:600;letter-spacing:.05em;text-transform:uppercase;color:var(--accent);background:#58a6ff1f;border:1px solid rgba(88,166,255,.3);border-radius:4px;padding:3px 8px;margin-bottom:20px}