:root { font-family: system-ui, sans-serif; }
body { margin: 0; background:#fafafa; color:#222; }
.wrap { max-width: 900px; margin: 0 auto; padding: 16px; }
header { background:#111; color:#fff; }
header a { color:#fff; margin-right: 12px; text-decoration:none; }
form { display:grid; gap:12px; max-width: 520px; }
input, select, button { padding:10px; font-size:16px; }
button { background:#2563eb; color:#fff; border:0; border-radius:6px; cursor:pointer; }
button:hover { filter:brightness(1.05); }
.error { color:#b91c1c; }
.flash { background:#ecfeff; border:1px solid #06b6d4; padding:10px; border-radius:6px; }
footer { color:#666; font-size:14px; }