*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html, body {
    height: 100%;
    font-family: 'Segoe UI', system-ui, -apple-system, sans-serif;
    background: #f0f4f8;
    color: #1a202c;
    -webkit-tap-highlight-color: transparent;
}

a { color: inherit; text-decoration: none; }
button { cursor: pointer; font-family: inherit; }