:root {
  --bg: #f4f0ea;
  --panel: #fffdf9;
  --ink: #2a2420;
  --muted: #6d625a;
  --line: #e3d9cc;
  --soft: #f3ece2;
  --accent: #b9622a;
  --accent-ink: #ffffff;
  --stage: #2b2724;
  --bar: #1f1c1a;
  --bar-ink: #eee4d8;
  --melt: #e07b24;
}

* { box-sizing: border-box; }
[hidden] { display: none !important; }

html, body {
  margin: 0;
  height: 100%;
  background: var(--bg);
  color: var(--ink);
  font: 14px/1.4 system-ui, -apple-system, "Segoe UI", sans-serif;
}

.app {
  display: grid;
  grid-template-columns: 350px 1fr;
  height: 100vh;
  height: 100dvh;
}

/* ---------- Side panel ---------- */

.panel {
  overflow-y: auto;
  background: var(--panel);
  border-right: 1px solid var(--line);
  padding: 14px 16px 60px;
}

.brand h1 { margin: 0; font-size: 20px; letter-spacing: -0.01em; }
.brand p { margin: 2px 0 8px; color: var(--muted); }
.steps { margin: 0 0 10px; padding-left: 20px; color: var(--muted); font-size: 13px; }
.steps li { margin: 1px 0; }

details {
  border-top: 1px solid var(--line);
  padding: 4px 0 10px;
}
summary {
  cursor: pointer;
  font-weight: 650;
  font-size: 15px;
  padding: 8px 0;
  list-style: none;
  display: flex;
  align-items: center;
  gap: 6px;
}
summary::-webkit-details-marker { display: none; }
summary::before {
  content: "";
  width: 7px; height: 7px;
  border-right: 2px solid var(--muted);
  border-bottom: 2px solid var(--muted);
  transform: rotate(-45deg);
  transition: transform 0.15s;
  margin-right: 4px;
}
details[open] > summary::before { transform: rotate(45deg); }

.hint { margin: 4px 0 8px; color: var(--muted); font-size: 12.5px; }
.key-melt { color: var(--melt); font-weight: 600; }
.key-hard { font-weight: 600; text-shadow: 0 0 1px #0006; }

.row2 { display: flex; gap: 8px; flex-wrap: wrap; }
.row2 > .field { flex: 1 1 90px; }

.field { display: flex; flex-direction: column; gap: 3px; margin: 6px 0; font-size: 13px; color: var(--muted); }
.field.inline { flex-direction: row; align-items: center; justify-content: space-between; }
.field-label { font-size: 13px; color: var(--muted); margin: 10px 0 4px; }
.field-label small { font-size: 12px; }

input[type="text"], input[type="number"], select {
  font: inherit;
  color: var(--ink);
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 7px;
  padding: 7px 9px;
  width: 100%;
  min-width: 0;
}
input[type="text"]:focus, input[type="number"]:focus, select:focus { outline: 2px solid var(--accent); outline-offset: -1px; }
input.bad { border-color: #c4342a; background: #fff1ef; }
input[type="color"] { width: 46px; height: 32px; padding: 2px; border: 1px solid var(--line); border-radius: 6px; background: #fff; }
input[type="range"] { width: 100%; accent-color: var(--accent); margin: 2px 0; }

.check { display: flex; gap: 8px; align-items: flex-start; margin: 7px 0; font-size: 13.5px; cursor: pointer; }
.check input { margin-top: 2px; accent-color: var(--accent); }

.ctl { margin: 10px 0 4px; }
.ctl-top { display: flex; justify-content: space-between; gap: 8px; font-size: 13.5px; }
.ctl-top output { color: var(--accent); font-weight: 650; font-variant-numeric: tabular-nums; white-space: nowrap; }

button {
  font: inherit;
  color: var(--ink);
  background: var(--soft);
  border: 1px solid var(--line);
  border-radius: 7px;
  padding: 6px 10px;
  cursor: pointer;
}
button:hover { background: #ebe1d3; }
button:disabled { opacity: 0.45; cursor: default; }
button.primary { background: var(--accent); color: var(--accent-ink); border-color: var(--accent); }
button.primary:hover { background: #a3541f; }
button.danger { color: #a52a1f; }

.seg { display: flex; flex-wrap: wrap; gap: 4px; margin: 6px 0; }
.seg button { flex: 1 1 auto; }
.seg button.on { background: var(--accent); color: var(--accent-ink); border-color: var(--accent); }
.seg.small button { padding: 3px 8px; font-size: 12.5px; }

.shapes { display: grid; grid-template-columns: repeat(4, 1fr); gap: 5px; }
.shapes button { display: flex; flex-direction: column; align-items: center; gap: 2px; padding: 6px 2px; font-size: 11.5px; }
.shapes svg { width: 26px; height: 26px; fill: currentColor; }

.quick, .presets, .buttons { display: flex; flex-wrap: wrap; gap: 5px; margin: 6px 0; }
.quick button { padding: 3px 9px; font-size: 12.5px; }
.presets button { flex: 1 1 30%; font-size: 13px; }
.buttons button { flex: 1 1 45%; }

.seed-row { display: flex; gap: 8px; align-items: flex-end; }
.seed-row .field { flex: 1; margin-bottom: 6px; }
.seed-row button { margin-bottom: 6px; white-space: nowrap; }

.edits { display: flex; justify-content: space-between; align-items: center; gap: 8px; margin-top: 10px; font-size: 13px; color: var(--muted); }
.edits button { font-size: 12.5px; padding: 4px 8px; white-space: nowrap; }

.palette { display: flex; flex-direction: column; gap: 6px; margin-bottom: 6px; }
.pal-row { display: flex; align-items: center; gap: 8px; }
.pal-row input[type="range"] { flex: 1; }
.pal-row .amt { width: 34px; text-align: right; font-size: 12.5px; color: var(--muted); font-variant-numeric: tabular-nums; }
.pal-row button { padding: 2px 8px; }

.stats dl { display: grid; grid-template-columns: auto 1fr; gap: 3px 12px; margin: 4px 0 8px; font-size: 13.5px; }
.stats dt { color: var(--muted); }
.stats dd { margin: 0; text-align: right; font-variant-numeric: tabular-nums; }
.stats .buy { font-size: 15px; }
.stats .warn { background: #fff4e5; border: 1px solid #f3d3a6; border-radius: 7px; padding: 6px 9px; font-size: 12.5px; margin: 6px 0; }

/* ---------- Drawing area ---------- */

.stage { display: flex; flex-direction: column; min-width: 0; min-height: 0; background: var(--stage); }

.toolbar {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 6px;
  padding: 7px 8px;
  background: var(--bar);
}
.tools, .tb-right { display: flex; gap: 4px; flex-wrap: wrap; }
.toolbar button, .brushbar button {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  color: var(--bar-ink);
  background: #34302c;
  border-color: #46403a;
  padding: 6px 10px;
  min-height: 34px;
}
.toolbar button:hover { background: #423c36; }
.toolbar button.on { background: var(--accent); border-color: var(--accent); color: #fff; }
.toolbar svg { width: 18px; height: 18px; fill: currentColor; flex: none; }

.brushbar { display: flex; align-items: center; gap: 8px; padding: 4px 10px 6px; background: var(--bar); color: var(--bar-ink); font-size: 13px; }
.brushbar .seg { margin: 0; }
.brushbar .seg button.on { background: var(--accent); border-color: var(--accent); }
.drawbar { flex-wrap: wrap; }
.drawbar span { min-width: 7.5em; }
.drawbar button { color: var(--bar-ink); background: #3a352f; border-color: #514840; padding: 4px 9px; font-size: 13px; }
.drawbar button:hover:not(:disabled) { background: #4a433c; }
.drawbar button:disabled { opacity: 0.45; }

.canvas-wrap { position: relative; flex: 1; min-height: 0; overflow: hidden; }
canvas { position: absolute; inset: 0; width: 100%; height: 100%; display: block; touch-action: none; }

.ctx-bar {
  position: absolute;
  left: 10px; top: 10px;
  max-width: calc(100% - 20px);
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 6px;
  background: rgba(24, 21, 19, 0.92);
  color: var(--bar-ink);
  border: 1px solid #4a433c;
  border-radius: 9px;
  padding: 6px 8px;
  font-size: 13px;
  box-shadow: 0 4px 16px #0006;
}
.ctx-bar button { color: var(--bar-ink); background: #3a352f; border-color: #514840; padding: 4px 9px; font-size: 13px; }
.ctx-bar button:hover { background: #4a433c; }

.toast {
  position: absolute;
  left: 50%; bottom: 14px;
  transform: translateX(-50%) translateY(20px);
  background: rgba(24, 21, 19, 0.94);
  color: #fff;
  padding: 8px 14px;
  border-radius: 9px;
  font-size: 13.5px;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.2s, transform 0.2s;
  max-width: calc(100% - 30px);
  text-align: center;
}
.toast.show { opacity: 1; transform: translateX(-50%) translateY(0); }

.statusbar {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  padding: 5px 10px;
  background: var(--bar);
  color: #cbbfb1;
  font-size: 12.5px;
  min-height: 26px;
}
.statusbar span:last-child { text-align: right; }

/* ---------- Phones and narrow windows ---------- */

@media (max-width: 820px) {
  .app { display: flex; flex-direction: column; height: auto; }
  .stage { position: sticky; top: 0; z-index: 5; height: 56vh; height: 56dvh; order: -1; }
  .panel { border-right: 0; overflow: visible; }
  .toolbar { padding: 5px; gap: 4px; }
  .toolbar button { padding: 5px 7px; min-height: 36px; }
  .tb-right span, .tools span { font-size: 12px; }
  .statusbar { font-size: 11.5px; flex-direction: column; gap: 0; }
  .statusbar span:last-child { text-align: left; }
}
@media (max-width: 440px) {
  .tb-right span { display: none; }
  .shapes { grid-template-columns: repeat(4, 1fr); }
}

@media print {
  .panel, .toolbar, .brushbar, .statusbar, .ctx-bar { display: none !important; }
  .app { display: block; height: auto; }
  .stage { height: 95vh; }
}