* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: Arial, "Hiragino Sans", "Yu Gothic", sans-serif;
  background: #111;
  color: #f5f5f5;
}

.app {
  max-width: 1100px;
  margin: 0 auto;
  padding: 24px;
}

h1 {
  margin-top: 0;
  margin-bottom: 20px;
}

.controls {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
  align-items: end;
  margin-bottom: 20px;
}

label {
  display: flex;
  flex-direction: column;
  gap: 6px;
  min-width: 180px;
}

button, select {
  font-size: 16px;
  padding: 10px 12px;
  border-radius: 10px;
  border: 1px solid #444;
  background: #1d1d1d;
  color: #fff;
}

button {
  cursor: pointer;
}

.meter-panel {
  background: #1b1b1b;
  border: 1px solid #333;
  border-radius: 16px;
  padding: 16px;
}

canvas {
  width: 100%;
  height: auto;
  display: block;
  background: #0d0d0d;
  border-radius: 12px;
}

.readout {
  margin-top: 16px;
  display: flex;
  gap: 24px;
  flex-wrap: wrap;
  color: #ccc;
}