*, *::before, *::after { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body { min-height: 100vh; font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", system-ui, sans-serif; }
html[data-theme="dark"] body { background: #1f1f1f; color: #fff; }
html[data-theme="light"] body { background: #fff; color: #242424; }