body {
  margin: 0;
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background: #f6f7fb;
  color: #222;
}
header {
  padding: 12px 16px;
  background: #ffffff;
  border-bottom: 1px solid #dcdfe6;
}
h1 {
  margin: 0;
  font-size: 1.2rem;
}
p {
  margin: 4px 0 0 0;
  font-size: 0.85rem;
  color: #555;
}
.controls {
  padding: 8px 16px;
  background: #ffffff;
  border-bottom: 1px solid #dcdfe6;
  display: flex;
  align-items: center;
  gap: 12px;
}
.controls label {
  font-size: 0.9rem;
  font-weight: 500;
}
.radio-option {
  display: flex;
  align-items: center;
  gap: 4px;
  font-weight: normal;
  cursor: pointer;
}
.radio-option input[type="radio"] {
  cursor: pointer;
}
main {
  height: calc(100vh - 120px);
}
#network {
  width: 100%;
  height: 100%;
  background: #ffffff;
  border-top: 1px solid #e0e0e0;
}