:root {
  --bg: #f5f6f8;
  --panel: #ffffff;
  --border: #d9dde3;
  --text: #24292f;
  --muted: #6b7280;
  --accent: #2563eb;
  --accent-soft: #eaf1fe;
  --danger: #dc2626;
  --tag-product: #eaf1fe;
  --tag-product-text: #2563eb;
  --tag-material: #eef7ee;
  --tag-material-text: #2f7d32;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: system-ui, -apple-system, "Segoe UI", "Hiragino Sans", "Noto Sans JP", sans-serif;
  font-size: 14px;
  line-height: 1.6;
}

header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 0.5rem;
  max-width: 1100px;
  margin: 0 auto;
  padding: 1rem 1rem 0;
}

h1 { font-size: 1.25rem; margin: 0; }
h2 { font-size: 1.05rem; margin: 0 0 0.75rem; }
h3 { font-size: 0.9rem; margin: 1.25rem 0 0.5rem; color: var(--muted); }

.toolbar { display: flex; align-items: center; gap: 0.5rem; }

.status { color: var(--muted); font-size: 0.85rem; margin-right: 0.25rem; }

button {
  font: inherit;
  padding: 0.35rem 0.8rem;
  border: 1px solid var(--border);
  border-radius: 6px;
  background: var(--panel);
  color: var(--text);
  cursor: pointer;
}
button:hover { border-color: var(--accent); }
button.primary { background: var(--accent); border-color: var(--accent); color: #fff; }
button.primary:hover { opacity: 0.9; }
button.danger { color: var(--danger); border-color: var(--danger); }
button.danger:hover { background: #fdf2f2; }

.banner {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 1rem;
  max-width: 1068px;
  margin: 0.75rem auto 0;
  padding: 0.6rem 0.9rem;
  border: 1px solid #f0b4b4;
  border-radius: 8px;
  background: #fdf2f2;
  color: var(--danger);
  white-space: pre-wrap;
}
.banner button { border: none; background: none; color: inherit; padding: 0 0.25rem; }

main {
  max-width: 1100px;
  margin: 0 auto;
  padding: 1rem;
}

.panel {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 1rem;
}

dialog {
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 1.25rem;
  width: min(560px, 92vw);
  max-height: 85vh;
  overflow-y: auto;
  color: var(--text);
  background: var(--panel);
}
dialog::backdrop { background: rgba(0, 0, 0, 0.35); }

#back-link { color: var(--accent); text-decoration: none; font-size: 0.85rem; }
#back-link:hover { text-decoration: underline; }

.hint { color: var(--muted); font-size: 0.85rem; }
.muted { color: var(--muted); }

.table-controls { margin-bottom: 0.5rem; }
.table-controls select {
  font: inherit;
  padding: 0.3rem 0.5rem;
  border: 1px solid var(--border);
  border-radius: 6px;
  background: var(--panel);
}

.form-row { display: flex; gap: 0.75rem; }
.form-row label { flex: 1; }

/* ---- table ---- */
.table-scroll { overflow-x: auto; }
table { width: 100%; border-collapse: collapse; }
th, td { padding: 0.45rem 0.6rem; border-bottom: 1px solid var(--border); text-align: left; }
th {
  cursor: pointer;
  user-select: none;
  font-size: 0.8rem;
  color: var(--muted);
  white-space: nowrap;
}
th:hover { color: var(--accent); }
th.sorted-asc::after { content: " ▲"; font-size: 0.7em; }
th.sorted-desc::after { content: " ▼"; font-size: 0.7em; }
td.num, th.num { text-align: right; font-variant-numeric: tabular-nums; }
tbody tr { cursor: pointer; }
tbody tr:hover { background: var(--accent-soft); }
tbody tr.selected { background: var(--accent-soft); box-shadow: inset 3px 0 0 var(--accent); }
tbody tr[draggable="true"] { cursor: grab; }
tbody tr.drop-above { box-shadow: inset 0 2px 0 var(--accent); }
tbody tr.drop-below { box-shadow: inset 0 -2px 0 var(--accent); }
td.recipe { font-size: 0.8rem; max-width: 16rem; }
td .tag {
  display: inline-block;
  margin-left: 0.5rem;
  padding: 0 0.4rem;
  border-radius: 4px;
  font-size: 0.7rem;
  vertical-align: 1px;
  background: var(--tag-product);
  color: var(--tag-product-text);
}
td .tag.tag-mat { background: var(--tag-material); color: var(--tag-material-text); }
td.neg { color: var(--danger); }

/* ---- detail ---- */
.detail-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.5rem;
  flex-wrap: wrap;
}
.summary { color: var(--muted); margin: 0.25rem 0 0; }

.tree, .tree ul { list-style: none; margin: 0; padding: 0; }
.tree ul { margin-left: 0.6rem; padding-left: 0.9rem; border-left: 1px solid var(--border); }
.tree li { padding: 0.15rem 0; }
.node-count { color: var(--accent); font-weight: 600; }
.node-cost { color: var(--muted); font-size: 0.85rem; }

.flat-list { list-style: none; margin: 0; padding: 0; }
.flat-list li { padding: 0.1rem 0; }
.flat-list li.linkish { cursor: pointer; color: var(--accent); }
.flat-list li.linkish:hover { text-decoration: underline; }
.flat-list .node-cost { margin-left: 0.35rem; }

/* ---- form ---- */
form label { display: block; margin-bottom: 0.75rem; }
form input[type="text"], form input[type="number"], form select {
  font: inherit;
  width: 100%;
  margin-top: 0.2rem;
  padding: 0.4rem 0.6rem;
  border: 1px solid var(--border);
  border-radius: 6px;
  background: var(--panel);
}
form input:disabled { background: var(--bg); color: var(--muted); }
fieldset {
  border: 1px solid var(--border);
  border-radius: 8px;
  margin: 0 0 0.75rem;
  padding: 0.6rem 0.8rem 0.8rem;
}
legend { font-size: 0.8rem; color: var(--muted); padding: 0 0.3rem; }

.chips { display: flex; flex-wrap: wrap; gap: 0.4rem; margin-bottom: 0.5rem; min-height: 1.5rem; }
.chip {
  display: inline-flex;
  align-items: center;
  gap: 0.25rem;
  padding: 0.1rem 0.3rem 0.1rem 0.6rem;
  border-radius: 999px;
  background: var(--accent-soft);
  color: var(--accent);
  font-size: 0.85rem;
}
.chip button {
  border: none;
  background: none;
  color: inherit;
  padding: 0 0.2rem;
  font-size: 0.9rem;
  line-height: 1;
}

.material-picker { display: flex; gap: 0.5rem; }
.material-picker select { flex: 1; margin-top: 0; }

.form-error { color: var(--danger); white-space: pre-wrap; }
.form-actions { display: flex; gap: 0.5rem; }