body {
  background-color: #121212;
  color: #e0e0e0;
  font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
  margin: 0;
  padding: 20px;
  text-align: center;
}

main {
  max-width: 960px;
  margin: 0 auto;
  background: #1e1e1e;
  padding: 30px;
  border-radius: 12px;
  box-shadow: 0 0 20px rgba(0, 100, 255, 0.3);
}

h1 {
  color: #ffffff;
  font-size: 32px;
  margin-bottom: 10px;
}

.controls {
  background-color: transparent;
  border-radius: 0;
  padding: 0;
  margin-bottom: 20px;
  box-shadow: none;
}

.control-row,
.toggle-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin: 12px 0;
  padding: 0 10px;
}

label {
  flex: 1;
  font-size: 1rem;
  font-weight: bold;
  color: #bbb;
  text-align: left;
}

input[type="range"] {
  flex: 2;
  margin-left: 1em;
  accent-color: #64b5f6;
  background-color: #333;
  border-radius: 4px;
}

input[type="checkbox"] {
  accent-color: #64b5f6;
}

.toggle-row label {
  font-size: 0.95rem;
  font-weight: 500;
  color: #ccc;
}

button {
  background-color: #64b5f6;
  color: #121212;
  padding: 10px 16px;
  border: none;
  border-radius: 6px;
  cursor: pointer;
  margin-top: 5px;
  margin-right: 5px;
  transition: background-color 0.2s ease-in-out;
  font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
  font-weight: bold;
  font-size: 1rem;
}
button:hover {
  background-color: #90caf9;
}
button:focus {
  outline: none;
}

.stats {
  margin-top: 1.5em;
  font-size: 1.2em;
  color: #ccc;
}
.stats p {
  margin: 5px;
}

canvas {
  display: block;
  margin: 20px auto;
  border: 2px solid #64b5f6;
  border-radius: 6px;
  box-shadow: none;
  background-color: #121212;
}

.explanation {
  background-color: #1e1e1e;
  padding: 20px;
  margin: 20px auto;
  border-radius: 12px;
  box-shadow: 0 0 20px rgba(0, 100, 255, 0.3);
  color: #ccc;
  text-align: left;
  max-width: 800px;
  display: block;
}
.explanation.hidden {
  display: none;
}
.explanation h2 {
  color: #90caf9;
  margin-top: 0;
}
.explanation p, .explanation ul {
  margin-bottom: 12px;
  line-height: 1.5;
  color: #ccc;
}
.explanation strong {
  color: #e0e0e0;
}
.explanation code {
  background-color: #2a2a2a;
  padding: 2px 5px;
  border-radius: 4px;
  font-family: 'Courier New', monospace;
  color: #90caf9;
}