body { font-family: Arial, sans-serif; margin: 0; background: #eef1f4; color: #222; }
header { background: #1f3a5f; color: #fff; padding: 12px 24px; }
header h1 { margin: 0; font-size: 20px; }
.banner { margin: 4px 0 0; font-size: 12px; opacity: .85; }
main { max-width: 520px; margin: 24px auto; background: #fff; padding: 20px 24px; border: 1px solid #c8d0d9; }
label { display: block; margin-top: 12px; font-size: 13px; }
input { width: 100%; padding: 6px; box-sizing: border-box; }
button { margin-top: 14px; padding: 6px 16px; }
table { margin-top: 16px; border-collapse: collapse; width: 100%; }
th, td { border: 1px solid #c8d0d9; padding: 6px 8px; text-align: left; }
.error { color: #b00020; }
[hidden] { display: none !important; }