html, body {
  margin: 0;
  padding: 0;
  background: #0b0b0c;
  color: #eaeaea;
  font-family: system-ui, -apple-system, Segoe UI, Roboto, Arial, sans-serif;
}

#app {
  max-width: 1200px;
  margin: 0 auto;
  padding: 16px;
}

h1 { margin: 8px 0 16px; font-size: 22px; font-weight: 650; }
h2 { margin: 0 0 10px; font-size: 16px; font-weight: 650; }

.row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
  align-items: start;
}

.panel {
  background: #131316;
  border: 1px solid #23232a;
  border-radius: 12px;
  padding: 12px;
  box-shadow: 0 8px 24px rgba(0,0,0,0.35);
}

canvas {
  background: #000000;
  border-radius: 10px;
  display: block;
}

.controls {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  align-items: center;
  margin-top: 10px;
}

.controls button {
  background: #242431;
  color: #eaeaea;
  border: 1px solid #343444;
  border-radius: 10px;
  padding: 8px 12px;
  cursor: pointer;
}

.controls button:hover { background: #2b2b3a; }

.inline { display: inline-flex; gap: 8px; align-items: center; }
.inline input[type="range"] { width: 160px; }

.mini {
  margin-top: 12px;
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 12px;
  align-items: start;
}

.label { opacity: 0.85; font-size: 12px; margin-bottom: 6px; }
.mono { font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", monospace; }

.note {
  margin-top: 10px;
  opacity: 0.85;
  font-size: 12px;
}

.topRow {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
}

.hint { opacity: 0.75; font-size: 12px; margin: 6px 0 10px; }

.verdict {
  margin-top: 10px;
  background: #0f0f13;
  border: 1px solid #23232a;
  border-radius: 10px;
  padding: 10px;
  min-height: 72px;
}

.status { margin-top: 10px; opacity: 0.85; font-size: 12px; }

#draw {
  cursor: crosshair;
  touch-action: none;           /* required for reliable 1-finger drawing on Android */
  -webkit-user-select: none;
  user-select: none;
  -webkit-touch-callout: none;
}



#grid { width: 100%; height: auto; }