body {
  font-family: Arial, sans-serif;
  margin: 0;
  background: #f4f7fb;
  color: #1f2937;
}

.container {
  max-width: 1200px;
  margin: 24px auto;
  padding: 0 16px;
}

.card {
  background: #fff;
  border: 1px solid #e5e7eb;
  border-radius: 10px;
  padding: 16px;
  margin-bottom: 16px;
}

.grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 12px;
}

input, select, button {
  width: 100%;
  padding: 10px;
  border: 1px solid #cbd5e1;
  border-radius: 8px;
  margin-top: 6px;
  margin-bottom: 10px;
}

button {
  background: #2563eb;
  color: #fff;
  border: 0;
  cursor: pointer;
}

table {
  width: 100%;
  border-collapse: collapse;
}

th, td {
  border: 1px solid #e5e7eb;
  padding: 8px;
  text-align: left;
  font-size: 14px;
}

.topbar {
  background: #111827;
  color: #fff;
  padding: 12px 16px;
}

.topbar a {
  color: #93c5fd;
  text-decoration: none;
  margin-right: 12px;
}

.ok {
  background: #dcfce7;
  border: 1px solid #86efac;
  padding: 10px;
  border-radius: 8px;
}

.err {
  background: #fee2e2;
  border: 1px solid #fca5a5;
  padding: 10px;
  border-radius: 8px;
}