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:root{--bg-primary:#0a0e14;--bg-secondary:#0f1419;--bg-tertiary:#151c24;--bg-grid:#3250781f;--signal-high:#0f8;--signal-low:#345;--signal-glow:#00ff8880;--component-stroke:#4a9eff;--component-fill:#0a1428f2;--component-selected:#0ff;--component-hover:#5ab0ff;--text-primary:#e0e8f0;--text-secondary:#6a7a8a;--text-muted:#3a4a5a;--accent:#4a9eff;--accent-glow:#4a9eff4d;--border:#4a9eff33}*{box-sizing:border-box;margin:0;padding:0}html,body{height:100%;overflow:hidden}body{background:var(--bg-primary);color:var(--text-primary)}.app{height:100vh;display:flex}.main-area{flex-direction:column;flex:1;display:flex;overflow:hidden}.toolbar{background:var(--bg-secondary);border-bottom:1px solid var(--border);align-items:center;gap:16px;height:48px;padding:0 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var(--accent-glow)}.dialog-input::placeholder{color:var(--text-muted)}.dialog-actions{justify-content:flex-end;gap:8px;margin-top:20px;display:flex}.dialog-btn{cursor:pointer;border-radius:4px;padding:8px 16px;font-family:JetBrains Mono,monospace;font-size:12px;transition:all .15s}.dialog-btn-secondary{border:1px solid var(--border);color:var(--text-secondary);background:0 0}.dialog-btn-secondary:hover{border-color:var(--text-secondary);color:var(--text-primary)}.dialog-btn-primary{background:var(--accent);border:1px solid var(--accent);color:var(--bg-primary);font-weight:600}.dialog-btn-primary:hover:not(:disabled){box-shadow:0 0 12px var(--accent-glow)}.dialog-btn-primary:disabled{opacity:.5;cursor:not-allowed}.palette{background:var(--bg-secondary);border-right:1px solid var(--border);flex-direction:column;gap:20px;width:180px;padding:16px;display:flex;overflow-y:auto}.logo{color:var(--accent);letter-spacing:4px;text-align:center;border-bottom:1px solid var(--border);text-shadow:0 0 20px var(--accent-glow);padding:8px 0;font-size:24px;font-weight:700}.palette-section h2{text-transform:uppercase;letter-spacing:1.5px;color:var(--text-secondary);margin-bottom:12px;font-size:10px;font-weight:500}.palette-item{cursor:grab;border:1px solid #0000;border-radius:6px;align-items:center;gap:10px;padding:8px 10px;transition:all .15s;display:flex}.palette-item:hover{background:var(--bg-tertiary);border-color:var(--border)}.palette-item:active{cursor:grabbing;transform:scale(.98)}.palette-icon{background:var(--bg-primary);border:1px solid var(--component-stroke);border-radius:4px;justify-content:center;align-items:center;width:36px;height:28px;display:flex}.input-icon,.output-icon{color:var(--signal-low);font-size:14px;font-weight:600}.gate-svg{width:28px;height:20px;color:var(--component-stroke)}.palette-label{color:var(--text-primary);font-size:12px}.help{border-top:1px solid var(--border);margin-top:auto;padding-top:16px}.help ul{color:var(--text-muted);font-size:10px;line-height:1.8;list-style:none}.help li:before{content:">";color:var(--accent);margin-right:6px}.canvas-container{background:var(--bg-primary);flex:1;min-height:0;position:relative;overflow:hidden}#circuit-canvas{width:100%;height:100%;display:block}