:root {
    --color-primary: #2563eb;
    --color-primary-dark: #1e3a8a;
    --font-body: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
}

* {
    box-sizing: border-box;
}

body {
    margin: 0;
    font-family: var(--font-body);
    color: #111827;
    background: #fff;
}