:root {
  --bg: #f4f5f7;
  --panel: #ffffff;
  --ink: #1c2230;
  --muted: #6b7280;
  --accent: #4f46e5;     /* 3Dキーホルダーのインディゴ */
  --border: #d9dde3;
}
* { box-sizing: border-box; }
html, body { margin: 0; height: 100%; }
body {
  font-family: "Yu Gothic", "Hiragino Kaku Gothic ProN", system-ui, sans-serif;
  color: var(--ink);
  background: var(--bg);
  display: flex; flex-direction: column; min-height: 100vh;
}
header {
  padding: 14px 20px; background: var(--panel); border-bottom: 1px solid var(--border);
}
header h1 { margin: 0; font-size: 18px; }
header .sub { margin: 2px 0 0; font-size: 12px; color: var(--muted); }

main { flex: 1; display: flex; min-height: 0; }

/* 左パネル */
#controls {
  width: 320px; flex-shrink: 0; overflow-y: auto;
  padding: 16px; background: var(--panel); border-right: 1px solid var(--border);
}
.group { margin-bottom: 18px; }
.group h2 { font-size: 13px; margin: 0 0 8px; color: var(--accent); letter-spacing: .04em; }
#controls label { display: flex; align-items: center; justify-content: space-between; gap: 8px; font-size: 13px; margin: 6px 0; }
#controls label.chk { justify-content: flex-start; }
#controls input[type="number"] { width: 80px; padding: 4px 6px; border: 1px solid var(--border); border-radius: 6px; }
#controls input[type="text"] { flex: 1; min-width: 0; padding: 5px 7px; border: 1px solid var(--border); border-radius: 6px; }
#controls select { flex-shrink: 0; padding: 4px; border: 1px solid var(--border); border-radius: 6px; }
.hint { font-size: 11px; color: var(--muted); margin: 6px 0 0; line-height: 1.5; }
.print-guide { border: 1px solid #c7d2fe; border-radius: 8px; padding: 10px; background: #eef2ff; }
.print-guide summary { cursor: pointer; color: var(--accent); font-size: 13px; font-weight: 700; }
.print-guide ul { margin: 8px 0 0; padding-left: 18px; color: var(--ink); font-size: 12px; line-height: 1.6; }

/* パーツ行 */
.part-row { border: 1px solid var(--border); border-radius: 8px; padding: 8px; margin: 8px 0; background: #fafbfc; }
.part-row .row1 { display: flex; gap: 6px; align-items: center; margin-bottom: 6px; }
.part-row .row1 .idx { flex-shrink: 0; width: 18px; text-align: center; font-size: 12px; font-weight: 700; color: var(--muted); }
/* 絵文字パレット（選択時だけ開く） */
.emoji-picker summary { cursor: pointer; font-size: 12px; color: var(--accent); font-weight: 600; list-style: none; }
.emoji-picker summary::-webkit-details-marker { display: none; }
.emoji-picker summary::before { content: "▸ "; }
.emoji-picker[open] summary::before { content: "▾ "; }
.emoji-panel { margin-top: 8px; padding-top: 8px; border-top: 1px dashed var(--border); }
.emoji-tabs { display: flex; gap: 4px; margin-bottom: 6px; }
.emoji-tab { font-size: 11px; padding: 3px 8px; border: 1px solid var(--border); background: #fff; border-radius: 999px; cursor: pointer; color: var(--muted); }
.emoji-tab.active { background: var(--accent); border-color: var(--accent); color: #fff; }
.emoji-grid { display: flex; flex-wrap: wrap; gap: 4px; max-height: 140px; overflow-y: auto; }
.emoji-grid button { font-size: 16px; padding: 2px 6px; line-height: 1; border: 1px solid var(--border); background: #fff; border-radius: 6px; cursor: pointer; }

.btns { display: flex; flex-direction: column; gap: 8px; }
.btns button {
  padding: 9px; border: none; border-radius: 8px; background: var(--accent); color: #fff;
  font-size: 13px; cursor: pointer; font-weight: 600;
}
.btns button:hover { filter: brightness(1.06); }
.btns button:disabled { background: #c2c6cc; cursor: not-allowed; }

/* プレビュー */
#viewer { flex: 1; position: relative; min-width: 0; }
#canvasWrap { position: absolute; inset: 0; }
#canvasWrap canvas { display: block; width: 100%; height: 100%; }
#status {
  position: absolute; left: 12px; bottom: 12px; font-size: 12px; color: var(--muted);
  background: rgba(255,255,255,.85); padding: 4px 10px; border-radius: 6px; border: 1px solid var(--border);
}

/* スマホ（閲覧/DLのみ・縦積み） */
@media (max-width: 760px) {
  main { flex-direction: column; }
  #controls { width: auto; max-height: 50vh; border-right: none; border-bottom: 1px solid var(--border); }
  #viewer { min-height: 50vh; }
}