:root{--bg-primary:#0d0d0d;--bg-surface:#161613;--bg-surface-raised:#1e1e1a;--bg-input:#131311;--border-subtle:#2a2a24;--border-strong:#3a3a32;--green-bright:#7ed321;--green-light:#cbe568;--green-glow:#7ed32159;--cream:#f0f2d5;--cream-dim:#b8baa3;--text-muted:#7a7c6e;--danger:#e5484d;--warning:#e5a83d;--font-display:"Sora", "Segoe UI", Roboto, Arial, sans-serif;--font-body:"Manrope", "Segoe UI", Roboto, Arial, sans-serif;--font-mono:"IBM Plex Mono", "SF Mono", Consolas, "Courier New", monospace;--radius-sm:6px;--radius-md:10px;--radius-lg:16px}*{box-sizing:border-box}html,body{margin:0;padding:0}body{font-family:var(--font-body);background:var(--bg-primary);color:var(--cream);font-synthesis:none;text-rendering:optimizelegibility;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}#root{min-height:100svh}input,button{font-family:inherit}.unit-toggle{border:1px solid var(--border-strong);border-radius:var(--radius-sm);flex-shrink:0;display:flex;overflow:hidden}.unit-toggle__btn{font-family:var(--font-mono);letter-spacing:.04em;background:var(--bg-input);color:var(--cream-dim);cursor:pointer;border:none;padding:6px 14px;font-size:13px;font-weight:600;transition:background-color .15s,color .15s}.unit-toggle__btn:not(:last-child){border-right:1px solid var(--border-strong)}.unit-toggle__btn--active{background:var(--green-bright);color:var(--bg-primary)}.unit-toggle__btn:hover:not(.unit-toggle__btn--active){color:var(--cream)}.tool-header{border-bottom:1px solid var(--border-subtle);background:var(--bg-primary);justify-content:space-between;align-items:center;gap:12px;padding:12px 20px;display:flex}.tool-header__logo{object-fit:contain;flex-shrink:1;width:auto;min-width:0;max-width:62%;height:34px;display:block}.unit-toggle{flex-shrink:0}.tool-footer{text-align:center;border-top:1px solid 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