html, body {
  margin: 0;
  padding: 0;
  height: 100%;
  background: radial-gradient(circle at top, #1f1f1f, #121212);
  font-family: 'Days One', sans-serif;
  color: #f0f0f0;
  box-sizing: border-box;
  overflow-x: hidden;
}

body {
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 40px 20px;
  gap: 20px;
}

h1 {
  margin: 0;
  font-size: 2.5rem;
  letter-spacing: 1px;
  text-transform: uppercase;
  text-align: center;
}

input[type="file"], button, label, select, input[type="range"] {
  font-size: 1rem;
  font-family: 'Days One', sans-serif;
}

button {
  background-color: #333;
  color: #fff;
  border: 1px solid #444;
  border-radius: 10px;
  padding: 10px 20px;
  transition: background 0.3s, transform 0.2s;
}

button:hover {
  background-color: #555;
  transform: translateY(-2px);
}

label, select, input[type="range"], input[type="checkbox"], span {
  margin-left: 8px;
  vertical-align: middle;
}

select, input[type="range"] {
  background-color: #2a2a2a;
  color: #fff;
  border: 1px solid #555;
  border-radius: 6px;
  padding: 4px 8px;
}

input[type="checkbox"] {
  transform: scale(1.2);
}

canvas#canvas {
  border: 2px solid #444;
  max-width: 100%;
  height: auto;
  border-radius: 8px;
  box-shadow: 0 0 20px rgba(0,0,0,0.6);
}