/* General page setup */
body {
  margin: 0;
  height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background: #f9fafb; /* default background */
  font-family: "Segoe UI", Tahoma, Geneva, Verdana, sans-serif;
  transition: background 0.4s ease-in-out;
}

/* Container */
.canvas {
  text-align: center;
  padding: 30px;
  border-radius: 16px;
  background: rgba(255, 255, 255, 0.85);
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
  backdrop-filter: blur(8px);
  max-width: 600px;
}

/* Heading styles */
.canvas h1 {
  font-size: 2rem;
  margin-bottom: 20px;
  color: #111827;
}

.canvas h2 {
  font-size: 1.1rem;
  margin-top: 25px;
  color: #374151;
}

.canvas h2 span {
  display: block;
  margin-top: 5px;
  font-size: 0.95rem;
  color: #6b7280;
}

/* Color buttons */
.button {
  display: inline-block;
  width: 50px;
  height: 50px;
  margin: 8px;
  border-radius: 50%;
  cursor: pointer;
  border: 2px solid #ddd;
  box-shadow: 0 4px 10px rgba(0,0,0,0.15);
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

/* Hover effect */
.button:hover {
  transform: scale(1.1);
  box-shadow: 0 6px 16px rgba(0,0,0,0.2);
}

/* Individual button colors */
#grey { background: grey; }
#white { background: white; border: 2px solid #ccc; }
#blue { background: #3b82f6; }
#yellow { background: #facc15; }
#purple { background: #8b5cf6; }