* { margin: 0; padding: 0; box-sizing: border-box; }

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  background: #1a1a2e;
  color: #fff;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
}

.back-link {
  position: fixed;
  top: 16px;
  left: 16px;
  color: #cfd2e3;
  text-decoration: none;
  font-weight: 500;
}

.back-link:hover { color: #fff; }

.wrap {
  text-align: center;
}

h1 { margin-bottom: 8px; }

.score { color: #cfd2e3; margin-bottom: 16px; }

canvas {
  background: #16213e;
  border: 2px solid #4361ee;
  border-radius: 8px;
}

.hint {
  color: #8890b5;
  margin-top: 16px;
  font-size: 0.9rem;
}

.credit {
  color: #6b7399;
  margin-top: 8px;
  font-size: 0.8rem;
}