.grid {
  display: grid;
  background: #999;
}

.grid.no-lines .pixel {
  border: none;
}

.pixel {
  background: black;
  border: 1px solid #ccc;
  box-sizing: border-box;
}

.pixel.black {
  background: white;
}

button {
  white-space: nowrap;
}


body {
  font-family: system-ui, sans-serif;
  background: #f4f4f4;
  margin: 0;
  padding: 16px;
}

.top-nav {
  margin-bottom: 8px;
}

.top-nav a {
  text-decoration: none;
  color: #555;
  font-weight: 500;
}

h1 {
  margin: 8px 0 16px;
  font-size: 1.4rem;
}

.panel {
  background: white;
  padding: 12px;
  border-radius: 8px;
  box-shadow: 0 2px 6px rgba(0,0,0,0.08);
  max-width: 900px;
}

.controls {
  display: flex;
  gap: 12px;
  align-items: center;
  flex-wrap: wrap;
  margin-bottom: 12px;
}

.controls label {
  display: flex;
  align-items: center;
  gap: 4px;
}

.io {
  display: flex;
  gap: 12px;
}

.textarea-group {
  flex: 1;
  display: flex;
  flex-direction: column;
}

.textarea-group label {
  font-size: 0.9rem;
  margin-bottom: 4px;
  color: #444;
}

textarea {
  resize: none;
  height: 140px;
  font-family: monospace;
  padding: 6px;
}

.buttons {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

button {
  padding: 6px 10px;
  cursor: pointer;
}