:root{--color-primary: #2563eb;--color-danger: #dc2626;--color-bg: #f8fafc;--color-surface: #ffffff;--color-border: #e2e8f0;--color-text: #1e293b;--color-muted: #64748b}*,*:before,*:after{box-sizing:border-box}html,body{margin:0;padding:0;font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica,Arial,sans-serif;font-size:16px;color:var(--color-text);background:var(--color-bg);-webkit-font-smoothing:antialiased}button,textarea{font-family:inherit}input,textarea{outline-color:var(--color-primary)}