body {
  font-family: Arial, sans-serif;
  background: #f2f2f2;
  margin: 0;
  padding: 20px;
}

.container {
  max-width: 1000px;
  margin: auto;
  background: white;
  padding: 20px;
  border-radius: 10px;
}

h1 {
  text-align: center;
}

.controls {
  margin-bottom: 20px;
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  align-items: center;
}

canvas {
  max-width: 600px;
  max-height: 400px;
  margin-top: 20px;
  background: #fff;
  border: 1px solid #ccc;
}

table {
  width: 100%;
  margin-top: 20px;
  border-collapse: collapse;
}

th, td {
  border: 1px solid #aaa;
  padding: 5px;
  text-align: center;
  background-color: #fdfdfd;
}