:root { color-scheme: dark; font-family: "Microsoft JhengHei", system-ui, sans-serif; }
* { box-sizing: border-box; }
body { margin: 0; background: #0f172a; color: #f8fafc; }
main { min-height: 100vh; min-height: 100svh; display: grid; place-items: center; padding: 24px; }
.member-login { display: inline-block; padding: 14px 36px; border-radius: 12px; background: #7c3aed; color: #fff; font-size: 18px; font-weight: 600; text-decoration: none; }
.member-login:hover { background: #6d28d9; }
.member-login:focus-visible { outline: 3px solid #c4b5fd; outline-offset: 5px; }