:root{--primary-color: #1976d2;--secondary-color: #ed6c02;--background-color: #f5f7fa;--paper-bg: #ffffff;--border-color: #e0e0e0;--border-radius: 8px}body{margin:0;padding:0;background-color:var(--background-color);font-family:Roboto,Helvetica,Arial,sans-serif;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}*{box-sizing:border-box}::-webkit-scrollbar{width:8px;height:8px}::-webkit-scrollbar-track{background:#f1f1f1}::-webkit-scrollbar-thumb{background:#c1c1c1;border-radius:4px}::-webkit-scrollbar-thumb:hover{background:#a8a8a8}.panel{border:1px solid var(--border-color);border-radius:var(--border-radius);background-color:var(--paper-bg)}.btn-primary{height:40px;border-radius:var(--border-radius)}.btn-secondary{min-height:36px;border-radius:var(--border-radius)}h1,h2,h3,h4,h5,h6{font-weight:600;color:#212121}.stack-spacing{gap:16px}