* { box-sizing: border-box; }
body {
  font-family: "Microsoft YaHei", -apple-system, "Segoe UI", sans-serif;
  background: #0f1420;
  color: #e4e8f1;
  margin: 0;
  padding: 0;
}
.topbar {
  background: #161c2c;
  padding: 14px 24px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  border-bottom: 1px solid #262e45;
}
.topbar a { color: #8fb8ff; text-decoration: none; margin-left: 16px; }
.topbar .brand { font-weight: bold; font-size: 16px; }
.container { max-width: 1100px; margin: 24px auto; padding: 0 20px; }
.card {
  background: #171d2e;
  border: 1px solid #262e45;
  border-radius: 10px;
  padding: 18px 20px;
  margin-bottom: 18px;
}
.card h2 { margin-top: 0; font-size: 16px; color: #aebfe8; }
.grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 14px; }
.stat { background: #1d2538; border-radius: 8px; padding: 12px 14px; }
.stat .num { font-size: 24px; font-weight: bold; }
.stat .label { font-size: 12px; color: #8792ab; margin-top: 4px; }
table { width: 100%; border-collapse: collapse; font-size: 13px; }
th, td { text-align: left; padding: 6px 8px; border-bottom: 1px solid #262e45; }
th { color: #8fb8ff; }
button, .btn {
  background: #3867f6; color: #fff; border: none; border-radius: 6px;
  padding: 8px 16px; font-size: 13px; cursor: pointer; margin-right: 8px;
  text-decoration: none; display: inline-block;
}
button.secondary, .btn.secondary { background: #2b3350; }
button.danger, .btn.danger { background: #a53e3e; }
button:disabled { opacity: 0.5; cursor: not-allowed; }
input, select, textarea {
  background: #0f1420; color: #e4e8f1; border: 1px solid #333c5c;
  border-radius: 6px; padding: 8px 10px; font-size: 13px;
}
textarea { width: 100%; font-family: Consolas, monospace; }
.log-box {
  background: #0a0e18; border: 1px solid #262e45; border-radius: 8px;
  padding: 10px; height: 340px; overflow-y: auto; font-family: Consolas, monospace;
  font-size: 12px; white-space: pre-wrap; line-height: 1.5;
}
.pill { display: inline-block; padding: 2px 8px; border-radius: 10px; font-size: 12px; }
.pill.on { background: #1e4d33; color: #6ee7a5; }
.pill.off { background: #4d1e1e; color: #e76e6e; }
.hint { color: #8792ab; font-size: 12px; }
.login-box { max-width: 360px; margin: 120px auto; }
.alert { padding: 10px 14px; border-radius: 6px; margin-bottom: 14px; }
.alert.error { background: #4d1e1e; color: #ffb3b3; }
.alert.ok { background: #1e4d33; color: #a5f0c4; }
.toolbar { margin-bottom: 14px; }
.form-row { margin-bottom: 10px; }
.form-row label { display: block; margin-bottom: 4px; font-size: 12px; color: #8792ab; }