/* reset / base */
*{box-sizing: border-box}
html,body{height:100%;margin:0}
body{font-family: system-ui, -apple-system, 'Segoe UI', Roboto, 'Helvetica Neue', Arial; background: linear-gradient(180deg,var(--sky-top),var(--sky-mid) 45%,var(--sky-bottom));}