:root{--font-sans: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;--color-text: #111827;--color-muted: #6b7280;--color-border: #d1d5db;--color-accent: #2563eb;--color-accent-hover: #1d4ed8;--color-error: #dc2626;--color-surface: #ffffff;--font-size-base: 1rem;--font-size-sm: .875rem;--font-size-lg: 1.25rem}html,body{margin:0;font-family:var(--font-sans);font-size:var(--font-size-base);color:var(--color-text)}button,input,select,textarea{font-family:inherit;font-size:inherit;color:inherit}