body {
  font-family: "Segoe UI", sans-serif;
  background: #0f172a;
  color: #e2e8f0;
  margin: 0;
  padding: 24px;
}
header, .panel {
  max-width: 960px;
  margin: 0 auto 16px;
  background: #1e293b;
  border-radius: 12px;
  padding: 16px 20px;
}
label {
  display: block;
  margin: 10px 0;
}
input, textarea, button {
  margin-top: 4px;
}
input, textarea {
  width: 100%;
  box-sizing: border-box;
  padding: 8px;
  border-radius: 6px;
  border: 1px solid #334155;
  background: #0f172a;
  color: #e2e8f0;
}
.form-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 0 14px;
}
h3 {
  margin-top: 24px;
}
button {
  background: #2563eb;
  color: white;
  border: none;
  padding: 8px 14px;
  border-radius: 6px;
  cursor: pointer;
  margin-right: 8px;
}
nav button {
  margin-bottom: 12px;
}
table {
  width: 100%;
  border-collapse: collapse;
}
td, th {
  border-bottom: 1px solid #334155;
  padding: 8px;
  text-align: left;
  vertical-align: top;
}
pre {
  white-space: pre-wrap;
  background: #0f172a;
  padding: 12px;
  border-radius: 8px;
}