:root{--color-bg:#ffffff;--color-fg:#111827;--color-muted:#6b7280;--color-accent:#ef4444;--color-border:#e5e7eb;--color-card:#f9fafb;--max-w:1100px}*{box-sizing:border-box}body,html{margin:0;padding:0;background:var(--color-bg);color:var(--color-fg);font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica Neue,sans-serif;line-height:1.5;-webkit-font-smoothing:antialiased}a{color:inherit}button{font:inherit;cursor:pointer}.container{max-width:var(--max-w);margin:0 auto;padding:0 24px}.btn{display:inline-flex;align-items:center;justify-content:center;padding:12px 20px;border-radius:8px;border:1px solid transparent;font-weight:600;font-size:15px;text-decoration:none}.btn-primary{background:var(--color-accent);color:#fff}.btn-primary:hover{background:#dc2626}.btn-secondary{background:transparent;border-color:var(--color-border);color:var(--color-fg)}.btn-link{background:transparent;border:none;color:var(--color-accent);padding:0;font-weight:500}.muted{color:var(--color-muted)}