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

:root {
  --bg: #0b0d12;
  --panel: #12151d;
  --edge: #232837;
  --text: #d7dce6;
  --dim: #6b7385;
  --accent: #5eead4;
}

body {
  background: var(--bg);
  color: var(--text);
  font: 14px/1.5 "SF Mono", "Cascadia Code", Menlo, monospace;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 20px 16px 40px;
}

header { text-align: center; margin-bottom: 18px; }
h1 { font-size: 22px; font-weight: 600; letter-spacing: 2px; }
h1 span { color: var(--accent); }
.sub { color: var(--dim); font-size: 12px; margin-top: 4px; }

main {
  display: flex;
  gap: 18px;
  flex-wrap: wrap;
  justify-content: center;
}

.panel {
  background: var(--panel);
  border: 1px solid var(--edge);
  border-radius: 10px;
  padding: 12px;
  position: relative;
}

canvas { display: block; border-radius: 6px; max-width: 100%; height: auto; }
#pad { cursor: crosshair; touch-action: none; }

.readout {
  display: flex;
  justify-content: space-between;
  color: var(--dim);
  font-size: 11px;
  margin-top: 8px;
  min-height: 16px;
}

.hint { color: var(--dim); font-size: 11px; text-align: center; margin-top: 8px; }

#controls {
  display: flex;
  gap: 20px;
  align-items: center;
  flex-wrap: wrap;
  justify-content: center;
  margin-top: 18px;
  color: var(--dim);
  font-size: 12px;
}

#controls label { display: flex; align-items: center; gap: 8px; }

select, button {
  background: var(--panel);
  color: var(--text);
  border: 1px solid var(--edge);
  border-radius: 6px;
  padding: 4px 10px;
  font: inherit;
  cursor: pointer;
}
button:hover { border-color: var(--accent); }

input[type=range] { accent-color: var(--accent); width: 110px; }
input[type=checkbox] { accent-color: var(--accent); }

#status { color: var(--accent); }
#status.err { color: #f87171; }