* { box-sizing: border-box; }
body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Arial, sans-serif;
  background: #f4f6f8;
  color: #1f2933;
  margin: 0;
}
.container { max-width: 480px; margin: 80px auto; padding: 0 16px; }
.container.wide { max-width: 1100px; margin: 32px auto; }
.card {
  background: #fff;
  border: 1px solid #e4e7eb;
  border-radius: 8px;
  padding: 32px;
  box-shadow: 0 1px 2px rgba(0,0,0,0.04);
}
h1, h2 { margin-top: 0; }
label { display: block; margin: 14px 0 6px; font-weight: 600; font-size: 14px; }
input[type=text], input[type=password], input[type=email] {
  width: 100%; padding: 10px 12px; border: 1px solid #cbd2d9; border-radius: 6px; font-size: 14px;
}
button, .btn {
  background: #2563eb; color: #fff; border: none; padding: 10px 18px;
  border-radius: 6px; font-size: 14px; cursor: pointer; text-decoration: none; display: inline-block;
}
button:hover, .btn:hover { background: #1d4ed8; }
.btn.secondary { background: #6b7280; }
.btn.danger { background: #dc2626; }
.error { background: #fee2e2; color: #991b1b; padding: 10px 14px; border-radius: 6px; margin: 14px 0; font-size: 14px; }
.success { background: #dcfce7; color: #166534; padding: 10px 14px; border-radius: 6px; margin: 14px 0; font-size: 14px; }
.notice { background: #fef9c3; color: #854d0e; padding: 10px 14px; border-radius: 6px; margin: 14px 0; font-size: 14px; }
table { width: 100%; border-collapse: collapse; margin-top: 16px; font-size: 14px; }
th, td { text-align: left; padding: 8px 10px; border-bottom: 1px solid #e4e7eb; }
th { background: #f9fafb; font-weight: 600; }
nav.topbar {
  background: #111827; color: #fff; padding: 14px 24px; display: flex;
  justify-content: space-between; align-items: center;
}
nav.topbar a { color: #cbd2d9; text-decoration: none; margin-left: 18px; font-size: 14px; }
nav.topbar a:hover { color: #fff; }
.badge { padding: 2px 8px; border-radius: 999px; font-size: 12px; font-weight: 600; }
.badge.active { background: #dcfce7; color: #166534; }
.badge.inactive { background: #e5e7eb; color: #374151; }
.badge.expired { background: #fee2e2; color: #991b1b; }
.muted { color: #6b7280; font-size: 13px; }