:root {
  --bg: #f5f6f8; --card: #ffffff; --text: #1d2330; --muted: #5f6878;
  --border: #d7dbe2; --accent: #0b5cad; --ok: #1f7a3a; --ok-bg: #e7f5ec;
  --no: #a3261b; --no-bg: #fbeceb;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #14171c; --card: #1e232b; --text: #e8ebf0; --muted: #9aa3b2;
    --border: #343b47; --accent: #5aa2ee; --ok: #6fd28e; --ok-bg: #173323;
    --no: #f08a80; --no-bg: #3a1d1b;
  }
}
* { box-sizing: border-box; }
[hidden] { display: none !important; }
body {
  margin: 0; padding: 48px 16px; background: var(--bg); color: var(--text);
  font: 16px/1.5 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
}
main {
  max-width: 560px; margin: 0 auto; background: var(--card);
  border: 1px solid var(--border); border-radius: 12px; padding: 28px;
}
main.wide { max-width: 720px; }
main.results { max-width: 760px; }
h1 { margin: 0 0 4px; font-size: 1.4rem; }
h2 { margin: 28px 0 4px; font-size: 1.05rem; }
p.sub { margin: 0 0 20px; color: var(--muted); }
p.hint { margin: 0 0 12px; color: var(--muted); font-size: 0.9rem; }
label { display: block; font-weight: 600; font-size: 0.9rem; margin: 12px 0 4px; }
input, select, textarea {
  width: 100%; min-width: 0; padding: 10px 12px; font: inherit; color: var(--text);
  background: var(--bg); border: 1px solid var(--border); border-radius: 8px;
}
textarea { min-height: 80px; resize: vertical; }
button {
  padding: 10px 18px; font: inherit; font-weight: 600; color: #fff;
  background: var(--accent); border: 1px solid transparent; border-radius: 8px; cursor: pointer;
}
button.plain { color: var(--text); background: transparent; border-color: var(--border); }
button:disabled { opacity: 0.6; cursor: wait; }
.row { display: flex; gap: 8px; align-items: flex-end; }
.row > * { flex: 1; min-width: 0; }
.row > button { flex: none; }
.actions { display: flex; gap: 8px; flex-wrap: wrap; margin-top: 24px; }
.topbar { display: flex; justify-content: space-between; align-items: flex-start; gap: 12px; }
#result, .status { margin-top: 20px; }
.box { padding: 16px; border-radius: 8px; border: 1px solid var(--border); }
.box.ok { background: var(--ok-bg); border-color: transparent; }
.box.no { background: var(--no-bg); border-color: transparent; }
.qty { font-size: 2rem; font-weight: 700; line-height: 1.1; }
.ok .qty { color: var(--ok); }
.no .qty { color: var(--no); }
.muted { color: var(--muted); font-size: 0.9rem; }
ul.hint { margin: 0 0 12px; padding-left: 20px; color: var(--muted); font-size: 0.9rem; }
ul.hint li { margin-bottom: 4px; }
.vendor-row, .vendor-head { display: grid; grid-template-columns: 1.2fr 1fr 1fr 92px; gap: 8px; }
.vendor-row { margin-bottom: 8px; }
.vendor-head { font-weight: 600; font-size: 0.9rem; margin-bottom: 4px; }
@media (max-width: 520px) {
  .search-row { flex-direction: column; align-items: stretch; }
  .vendor-head { display: none; }
  .vendor-row { grid-template-columns: 1fr; padding-bottom: 12px; border-bottom: 1px solid var(--border); }
}
.list-head { display: flex; justify-content: space-between; gap: 12px; align-items: baseline; margin-bottom: 8px; }
.table-wrap { overflow-x: auto; border: 1px solid var(--border); border-radius: 8px; }
table.parts { width: 100%; border-collapse: collapse; font-size: 0.95rem; }
table.parts th, table.parts td { padding: 9px 12px; text-align: left; border-bottom: 1px solid var(--border); vertical-align: top; }
table.parts tr:last-child td { border-bottom: 0; }
table.parts th { font-size: 0.8rem; text-transform: uppercase; letter-spacing: 0.03em; color: var(--muted); background: var(--bg); }
table.parts td.num, table.parts th.num { text-align: right; white-space: nowrap; }
table.parts td.pn { font-weight: 600; word-break: break-word; }
.stock-ok { color: var(--ok); font-weight: 700; }
.stock-no { color: var(--no); font-weight: 700; }
#more { margin-top: 12px; }
@media (max-width: 520px) { table.parts td.desc, table.parts th.desc { display: none; } }