:root {
  --bg: #e9eadf;
  --panel: #f7f4ea;
  --ink: #213229;
  --muted: #617164;
  --accent: #9d5c3d;
  --accent-2: #5d7f65;
  --line: #c9c5b7;
}
* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: Georgia, "Times New Roman", serif;
  color: var(--ink);
  background:
    radial-gradient(circle at top left, rgba(157, 92, 61, 0.14), transparent 28%),
    radial-gradient(circle at bottom right, rgba(93, 127, 101, 0.18), transparent 30%),
    var(--bg);
}
.layout {
  display: grid;
  grid-template-columns: 380px 1fr;
  min-height: 100vh;
}
.sidebar {
  padding: 18px;
  border-right: 1px solid var(--line);
  background: rgba(247, 244, 234, 0.92);
  overflow: auto;
  backdrop-filter: blur(10px);
}
.content {
  padding: 18px;
  display: grid;
  gap: 16px;
  align-content: start;
}
h1, h2 {
  margin: 0 0 10px;
  font-weight: 600;
  letter-spacing: 0.02em;
}
.sub {
  color: var(--muted);
  margin: 0 0 16px;
  line-height: 1.4;
}
.toolbar {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  align-items: center;
  margin-bottom: 14px;
}
button {
  appearance: none;
  border: 1px solid var(--ink);
  background: var(--ink);
  color: #f8f6ee;
  padding: 10px 14px;
  cursor: pointer;
  font: inherit;
}
button.secondary {
  background: transparent;
  color: var(--ink);
}
input[type="number"] {
  width: 108px;
  padding: 8px;
  border: 1px solid var(--line);
  background: #fffdf8;
  font: inherit;
}
.controls {
  display: grid;
  gap: 12px;
}
.tabs {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 12px;
}
.tab {
  appearance: none;
  border: 1px solid var(--line);
  background: rgba(255, 253, 247, 0.72);
  color: var(--ink);
  padding: 8px 12px;
  cursor: pointer;
  font: inherit;
}
.tab.active {
  background: var(--accent-2);
  color: #f8f6ee;
  border-color: var(--accent-2);
}
.tab-panel { display: none; }
.tab-panel.active { display: grid; gap: 12px; }
.control {
  padding: 12px;
  border: 1px solid var(--line);
  background: rgba(255, 253, 247, 0.8);
}
.control-head {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 8px;
  font-size: 14px;
}
.control-head strong { font-weight: 600; }
.range-row {
  display: grid;
  grid-template-columns: 1fr 80px;
  gap: 10px;
  align-items: center;
}
input[type="range"] {
  width: 100%;
  accent-color: var(--accent);
}
.panel {
  border: 1px solid var(--line);
  background: rgba(247, 244, 234, 0.82);
  padding: 14px;
}
.stats {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: 10px;
}
.stat {
  padding: 10px;
  background: rgba(255, 253, 247, 0.85);
  border: 1px solid var(--line);
}
.stat .label {
  display: block;
  color: var(--muted);
  font-size: 13px;
  margin-bottom: 4px;
}
.canvas-wrap {
  overflow: auto;
  max-width: 100%;
}
canvas {
  display: block;
  image-rendering: pixelated;
  border: 1px solid var(--line);
  background: #b7c9d9;
}
.status {
  color: var(--muted);
  min-height: 1.3em;
}
@media (max-width: 980px) {
  .layout { grid-template-columns: 1fr; }
  .sidebar { border-right: 0; border-bottom: 1px solid var(--line); }
}