:root {
  color-scheme: light;
  font-family: system-ui, -apple-system, Segoe UI, Roboto, sans-serif;
}

body {
  margin: 0;
  padding: 24px;
  background: #f7f7f8;
  color: #111;
}

.app {
  max-width: 1100px;
  margin: 0 auto;
  background: #fff;
  border: 1px solid #e6e6e9;
  border-radius: 12px;
  padding: 16px;
  box-shadow: 0 1px 2px rgba(0,0,0,0.06);
}

.header {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 12px;
}

button {
  border: 1px solid #d0d0d7;
  background: #fafafa;
  padding: 8px 12px;
  border-radius: 8px;
  cursor: pointer;
}

.header input[type="number"] {
  border: 1px solid #d0d0d7;
  background: #fff;
  padding: 6px 8px;
  border-radius: 8px;
  font-size: 13px;
  width: 90px;
}

button.connected {
  background: #d6f5d6;
  border-color: #9cd59c;
}

button:disabled {
  opacity: 0.6;
  cursor: not-allowed;
}

table {
  width: 100%;
  border-collapse: collapse;
  font-size: 14px;
}

th, td {
  text-align: left;
  padding: 8px;
  border-bottom: 1px solid #eee;
}

th.freq,
td.freq {
  text-align: right;
  font-variant-numeric: tabular-nums;
}

tr:hover {
  background: #fafafa;
}

tbody tr:nth-child(even) {
  background: #f2f3f5;
}

.status {
  margin-left: auto;
  font-size: 12px;
  color: #555;
}

.tuned {
  color: #0a7d0a;
  font-weight: 600;
}