body {
  font-family: sans-serif;
  margin: 20px;
  background: #f5f5f5;
  color: #333;
}

h1 {
  text-align: center;
  margin-bottom: 20px;
}

.container {
  display: flex;
  flex-wrap: wrap;
  gap: 20px;
  justify-content: center;
}

.controls {
  flex: 1;
  min-width: 500px;
  max-width: 1000px;
}

.buttons label {
  display: inline-block;
  margin: 5px 10px;
  padding: 5px 8px;
  background: #fff;
  border: 1px solid #ccc;
  border-radius: 6px;
}

#canvasContainer {
  width: 100%;
  position: relative;
}

#canvas {
  display: block;
  width: 100%;
  height: auto;
  border: 1px solid #999;
  background: #eee;
  cursor: crosshair;
}

.actions button {
  margin-right: 10px;
  margin-top: 10px;
}

.coords {
  flex: 0 0 300px;
  background: white;
  padding: 10px;
  border-radius: 6px;
  box-shadow: 0 0 4px rgba(0,0,0,0.1);
}

.coords table {
  width: 100%;
  border-collapse: collapse;
}

.coords th, .coords td {
  border-bottom: 1px solid #ddd;
  padding: 4px 6px;
  text-align: left;
}