* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: Arial, "PingFang SC", "Microsoft YaHei", sans-serif;
  background: #0b1220;
  color: #e8eefc;
}
header {
  padding: 20px;
  border-bottom: 1px solid #223150;
}
h1 { margin: 0 0 6px 0; font-size: 24px; }
p { margin: 4px 0; color: #b7c6e7; }
main {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
  padding: 16px;
}
.card {
  background: #121c31;
  border: 1px solid #243658;
  border-radius: 10px;
  padding: 14px;
}
h2 { margin: 0 0 10px 0; font-size: 18px; }
table {
  width: 100%;
  border-collapse: collapse;
  font-size: 14px;
}
th, td {
  border-bottom: 1px solid #253a5d;
  padding: 8px 6px;
  text-align: left;
}
th { color: #8fb1ff; }
pre {
  margin: 0;
  white-space: pre-wrap;
  word-break: break-word;
  color: #d4e0ff;
  background: #0c1528;
  border: 1px solid #243658;
  border-radius: 8px;
  padding: 10px;
  min-height: 120px;
}
.grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 10px;
  margin-bottom: 10px;
}
label {
  display: flex;
  flex-direction: column;
  gap: 4px;
  font-size: 13px;
  color: #c8d6f7;
}
input, select, button {
  background: #0c1528;
  color: #e8eefc;
  border: 1px solid #2f4878;
  border-radius: 6px;
  padding: 7px 8px;
}
button {
  cursor: pointer;
  margin: 6px 0 10px;
}
.toggle-group {
  display: inline-flex;
  gap: 6px;
}
.toggle-group .toggle-btn {
  margin: 0;
  padding: 6px 12px;
  font-size: 12px;
}
.toggle-group .toggle-btn.is-active {
  background: #2f6bff;
  border-color: #5d8dff;
  color: #fff;
  font-weight: 600;
}