body { font-family: Arial; background:#f4f4f4; padding:20px }
table { width:100%; background:#fff; border-collapse:collapse }
th,td { padding:10px; border-bottom:1px solid #ddd }
header { display:flex; justify-content:space-between }
.login form { max-width:300px; margin:80px auto; background:#fff; padding:30px }
.error { color:red }
a { text-decoration:none; color:#2c7 }