:root{--lightningcss-light: ;--lightningcss-dark:initial;color-scheme:dark;color:#f5f5f5;background:#0a0a0a;font-family:Arial,Helvetica,sans-serif}*{box-sizing:border-box}body{min-height:100vh;margin:0}a{color:inherit}main{max-width:1100px;margin:0 auto;padding:48px 24px}.card{background:#111;border:1px solid #2a2a2a;border-radius:18px;padding:24px}.stack{gap:16px;display:grid}input,button{font:inherit;border:1px solid #333;border-radius:10px;padding:12px 14px}input{color:#fff;background:#151515}button{cursor:pointer;color:#000;background:#fff;font-weight:700}.muted{color:#aaa}.error{color:#ff9a9a}