body {
  font-family: 'Segoe UI', 'PingFang SC', 'Microsoft YaHei', sans-serif;
  margin: 0;
  background: #f5f7fb;
  color: #1f2937;
}
header {
  background: linear-gradient(135deg, #0f172a, #1d4ed8);
  color: #fff;
  padding: 18px 28px;
}
nav a {
  color: #dbeafe;
  margin-right: 16px;
  text-decoration: none;
}
main {
  max-width: 1180px;
  margin: 24px auto;
  padding: 0 16px 48px;
}
.card {
  background: #fff;
  border-radius: 16px;
  box-shadow: 0 10px 30px rgba(15, 23, 42, 0.08);
  padding: 20px;
  margin-bottom: 20px;
}
.subcard {
  background: #f8fafc;
  box-shadow: none;
}
.grid {
  display: grid;
  gap: 16px;
}
.grid-2 {
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
}
.table {
  width: 100%;
  border-collapse: collapse;
}
.table th, .table td {
  padding: 10px 12px;
  border-bottom: 1px solid #e5e7eb;
  text-align: left;
  vertical-align: top;
}
.button, button {
  background: #2563eb;
  color: #fff;
  border: none;
  border-radius: 10px;
  padding: 10px 16px;
  cursor: pointer;
  text-decoration: none;
  display: inline-block;
}
.button.secondary, button.secondary {
  background: #0f766e;
}
.button.warn, button.warn {
  background: #b45309;
}
.button.danger, button.danger {
  background: #b91c1c;
}
input, select, textarea {
  width: 100%;
  padding: 10px 12px;
  border: 1px solid #cbd5e1;
  border-radius: 10px;
  box-sizing: border-box;
  margin-top: 6px;
  margin-bottom: 14px;
}
.badge {
  display: inline-block;
  padding: 4px 10px;
  border-radius: 999px;
  background: #dbeafe;
  color: #1d4ed8;
  font-size: 12px;
}
.badge.warn {
  background: #fef3c7;
  color: #92400e;
}
.badge.ok {
  background: #dcfce7;
  color: #166534;
}
.badge.err {
  background: #fee2e2;
  color: #991b1b;
}
.help {
  color: #64748b;
  font-size: 14px;
}
.flash {
  border-radius: 14px;
  padding: 12px 16px;
  margin-bottom: 16px;
}
.flash.success {
  background: #dcfce7;
  color: #166534;
}
.flash.error {
  background: #fee2e2;
  color: #991b1b;
}
pre {
  white-space: pre-wrap;
  word-break: break-word;
  background: #0f172a;
  color: #e2e8f0;
  padding: 14px;
  border-radius: 12px;
}