:root {
  --bg: #f7f7f5;
  --card: #fff;
  --ink: #1f2937;
  --line: #d5d7dd;
  --brand: #1d4ed8;
}
* { box-sizing: border-box; }
body {
  margin: 0;
  background: linear-gradient(180deg, #e8eefc, var(--bg) 35%);
  color: var(--ink);
  font-family: "Source Sans 3", "Noto Sans SC", sans-serif;
}
.container {
  max-width: 1100px;
  margin: 24px auto;
  padding: 0 16px 24px;
}
.card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 16px;
  margin-bottom: 16px;
}
label { display: block; margin: 8px 0; font-size: 14px; }
input, textarea, select {
  width: 100%;
  margin-top: 6px;
  padding: 10px;
  border: 1px solid var(--line);
  border-radius: 8px;
}
.row { display: flex; gap: 8px; margin-top: 8px; }
button {
  border: 0;
  background: var(--brand);
  color: #fff;
  padding: 10px 14px;
  border-radius: 8px;
  cursor: pointer;
}
table {
  width: 100%;
  border-collapse: collapse;
}
th, td {
  border-bottom: 1px solid var(--line);
  text-align: left;
  padding: 8px;
  font-size: 13px;
}
pre {
  white-space: pre-wrap;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #f8fafc;
  min-height: 100px;
  padding: 10px;
}