* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  font-family: 'Segoe UI', sans-serif;
}

body {
  background: #121212;
  color: #f1f1f1;
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 1rem;
}

header {
  text-align: center;
  margin-bottom: 2rem;
}

.logo {
  height: 60px;
}

main {
  width: 90%;
  max-width: 700px;
  text-align: center;
}

button {
  background: #0f62fe;
  color: white;
  padding: 0.8rem 1.5rem;
  font-size: 1rem;
  border: none;
  border-radius: 8px;
  cursor: pointer;
  margin-bottom: 1.5rem;
}

canvas {
  background-color: #1e1e1e;
  border-radius: 10px;
  margin-bottom: 1rem;
  padding: 0.5rem;
}

#feedback {
  margin-top: 1rem;
  text-align: left;
}

footer {
  margin-top: 3rem;
  font-size: 0.85rem;
  color: #ccc;
}