:root {
  --bg: #f6f7f9;
  --panel: #ffffff;
  --text: #1d2330;
  --muted: #5d6677;
  --border: #d8dce3;
  --accent: #2f6fdb;
  --accent-hover: #2559b3;
  --accent-text: #ffffff;
  --danger: #c0392b;
  --warn: #9a6700;
  --ok: #1e7d3c;
  --viewport-bg: #eef1f5;
  --button: #eef1f6;
  --button-hover: #e1e6ee;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #14171c;
    --panel: #1c2027;
    --text: #e6e9ef;
    --muted: #9aa3b2;
    --border: #2e343e;
    --accent: #5b8ff0;
    --accent-hover: #80a9f4;
    --accent-text: #0b1020;
    --danger: #ff7b6b;
    --warn: #f0b429;
    --ok: #5fd38a;
    --viewport-bg: #0f1216;
    --button: #262b34;
    --button-hover: #313844;
  }
}

* { box-sizing: border-box; }
html, body { margin: 0; height: 100%; }
body {
  background: var(--bg);
  color: var(--text);
  font: 14px/1.5 system-ui, -apple-system, "Segoe UI", "Hiragino Sans", "Noto Sans JP", sans-serif;
  display: flex;
  flex-direction: column;
}

.bar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px 16px;
  padding: 8px 16px;
  background: var(--panel);
  border-bottom: 1px solid var(--border);
}
.bar h1 { font-size: 16px; margin: 0; white-space: nowrap; }
.bar-actions { display: flex; flex-wrap: wrap; gap: 6px; margin-left: auto; }
.title-field input { width: 12em; }

button, .file-button {
  font: inherit;
  color: var(--text);
  background: var(--button);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 4px 10px;
  cursor: pointer;
}
button:hover:not(:disabled), .file-button:hover { background: var(--button-hover); }
button:disabled { opacity: 0.45; cursor: default; }
button.primary { background: var(--accent); color: var(--accent-text); border-color: var(--accent); }
/* must out-rank button:hover:not(:disabled) above, or the hover background is the light grey
   one under white text (seen 2026-11-01 on 最適化を実行 in a browser screenshot) */
button.primary:hover:not(:disabled) { background: var(--accent-hover); border-color: var(--accent-hover); }
button.wide { width: 100%; margin-top: 8px; }
.file-button input { display: none; }
input[type="text"], select {
  font: inherit;
  color: var(--text);
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 3px 6px;
}

.layout {
  flex: 1;
  min-height: 0;
  display: grid;
  grid-template-columns: 270px minmax(0, 1fr) 300px;
}
.panel {
  background: var(--panel);
  overflow-y: auto;
  padding: 8px 12px 16px;
}
.tools { border-right: 1px solid var(--border); }
.status { border-left: 1px solid var(--border); }
.panel section { padding: 8px 0; border-bottom: 1px solid var(--border); }
.panel section:last-child { border-bottom: none; }
.panel h2 { font-size: 13px; margin: 0 0 6px; color: var(--muted); font-weight: 600; }
.hint { font-size: 12px; color: var(--muted); margin: 4px 0; }
.row { display: flex; flex-wrap: wrap; gap: 6px; align-items: center; margin: 4px 0; }
.check { display: inline-flex; gap: 4px; align-items: center; }
.field { display: flex; flex-direction: column; gap: 2px; margin-bottom: 6px; }

.grid-buttons { display: grid; grid-template-columns: repeat(6, 1fr); gap: 4px; }
.grid-buttons.presets { grid-template-columns: repeat(3, 1fr); }
.grid-buttons button { padding: 4px 0; }
.grid-buttons button.active { outline: 2px solid var(--accent); }

.segmented { display: flex; border: 1px solid var(--border); border-radius: 6px; overflow: hidden; }
.segmented label { flex: 1; text-align: center; cursor: pointer; }
.segmented input { position: absolute; opacity: 0; pointer-events: none; }
.segmented span { display: block; padding: 4px 0; background: var(--button); }
.segmented input:checked + span { background: var(--accent); color: var(--accent-text); }
.segmented input:focus-visible + span { outline: 2px solid var(--accent); outline-offset: -2px; }

.viewport-wrap { position: relative; min-width: 0; min-height: 0; }
.viewport { position: absolute; inset: 0; background: var(--viewport-bg); }
.viewport canvas { display: block; width: 100%; height: 100%; touch-action: none; }
.empty-hint {
  position: absolute; left: 50%; top: 50%; transform: translate(-50%, -50%);
  color: var(--muted); pointer-events: none; text-align: center; padding: 0 16px;
}
.empty-hint[hidden] { display: none; }

.selection-info, .summary, .result { font-size: 13px; }
.result dl { display: grid; grid-template-columns: auto 1fr; gap: 2px 8px; margin: 0; }
.result dt { color: var(--muted); }
.result dd { margin: 0; }
.result ul { margin: 4px 0; padding-left: 18px; }
.warn { color: var(--warn); }
.error { color: var(--danger); }
.ok { color: var(--ok); }

/* room for the marker "200." (main.js keeps 200 entries); 20px cut "11." to "l1." */
.log { margin: 0; padding-left: 4.5ch; font-size: 12px; max-height: 40vh; overflow-y: auto; }
.log li { margin: 2px 0; }

@media (max-width: 960px) {
  .layout { grid-template-columns: 1fr; grid-auto-rows: auto; }
  .viewport-wrap { height: 60vh; order: -1; }
  .tools, .status { border: none; border-top: 1px solid var(--border); padding: 8px 16px 16px; }
  .bar-actions { margin-left: 0; }
}