:root{--color-background: #ffffff;--color-surface: #f5f5f7;--color-border: #d1d5db;--color-text: #111827;--color-text-muted: #6b7280;--color-primary: #2563eb;--color-primary-hover: #1d4ed8;--color-secondary: #6b7280;--color-secondary-hover: #4b5563;--color-destructive: #dc2626;--color-destructive-hover: #b91c1c;--color-on-primary: #ffffff;--color-on-secondary: #ffffff;--color-on-destructive: #ffffff}*,*:before,*:after{box-sizing:border-box}body{margin:0;font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica,Arial,sans-serif;font-size:16px;line-height:24px;color:var(--color-text);background-color:var(--color-background)}button{display:inline-flex;align-items:center;justify-content:center;padding:10px 16px;border:none;border-radius:6px;font-size:14px;font-weight:500;line-height:20px;cursor:pointer;transition:background-color .15s ease}button:disabled{opacity:.5;cursor:not-allowed}.btn-primary{background-color:var(--color-primary);color:var(--color-on-primary)}.btn-primary:hover:not(:disabled){background-color:var(--color-primary-hover)}.btn-secondary{background-color:var(--color-secondary);color:var(--color-on-secondary)}.btn-secondary:hover:not(:disabled){background-color:var(--color-secondary-hover)}.btn-destructive{background-color:var(--color-destructive);color:var(--color-on-destructive)}.btn-destructive:hover:not(:disabled){background-color:var(--color-destructive-hover)}