body { font-family: system-ui, sans-serif; margin: 0; background: #f6f6f4; color: #222; }
header { background: #222; padding: .6rem 1rem; }
header a { color: #fff; text-decoration: none; font-weight: 600; }
header .who { color: #aaa; margin-left: 1rem; }
main { max-width: 60rem; margin: 1rem auto; padding: 0 1rem; }
table { border-collapse: collapse; width: 100%; background: #fff; }
th, td { text-align: left; padding: .4rem .6rem; border-bottom: 1px solid #ddd; }
button, input[type=submit] { padding: .3rem .8rem; }
.error { color: #a00; }
header nav { display: inline-block; margin-left: 1rem; }
header nav a { color: #ccc; margin-right: .8rem; font-weight: 400; }