:root {
  color-scheme: light;
  --bg: #f4f5f3;
  --surface: #fcfcfb;
  --surface-2: #eef0ec;
  --border: #d9dbd5;
  --text: #0b0b0b;
  --text-2: #4a4945;
  --muted: #6a6964;
  --accent: #1f6bc4;
  --accent-ink: #ffffff;
  --good: #0a7a3a;
  --bad: #b3261e;
  --warn-bg: #fff4d6;
  --warn-ink: #5c4300;
  --s1: #2a78d6;  /* pmcf demand */
  --s2: #eb6834;  /* RELEX */
  --s3: #1baf7a;  /* expected sales */
  --hist: #9aa3ad;
  --oos: rgba(227, 73, 72, 0.13);
  --grid: #e3e4df;
  --focus: #1f6bc4;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    color-scheme: dark;
    --bg: #121211;
    --surface: #1a1a19;
    --surface-2: #242422;
    --border: #3a3a37;
    --text: #f0efec;
    --text-2: #c3c2b7;
    --muted: #a3a29a;
    --accent: #5b9cec;
    --accent-ink: #0b0b0b;
    --good: #5fcf8a;
    --bad: #ff8a80;
    --warn-bg: #3a2f10;
    --warn-ink: #ffe3a1;
    --s1: #3987e5;
    --s2: #d95926;
    --s3: #199e70;
    --hist: #6b737c;
    --oos: rgba(230, 103, 103, 0.18);
    --grid: #2e2e2c;
    --focus: #8cbcf5;
  }
}
:root[data-theme="dark"] {
  color-scheme: dark;
  --bg: #121211;
  --surface: #1a1a19;
  --surface-2: #242422;
  --border: #3a3a37;
  --text: #f0efec;
  --text-2: #c3c2b7;
  --muted: #a3a29a;
  --accent: #5b9cec;
  --accent-ink: #0b0b0b;
  --good: #5fcf8a;
  --bad: #ff8a80;
  --warn-bg: #3a2f10;
  --warn-ink: #ffe3a1;
  --s1: #3987e5;
  --s2: #d95926;
  --s3: #199e70;
  --hist: #6b737c;
  --oos: rgba(230, 103, 103, 0.18);
  --grid: #2e2e2c;
  --focus: #8cbcf5;
}

* { box-sizing: border-box; }
html, body { margin: 0; }
body {
  background: var(--bg);
  color: var(--text);
  font: 14px/1.45 system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
}
a { color: var(--accent); }
code { font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace; font-size: 0.92em; }
:focus-visible { outline: 3px solid var(--focus); outline-offset: 2px; }
.skip { position: absolute; left: -9999px; top: 0; background: var(--surface); padding: 8px 12px; z-index: 10; }
.skip:focus { left: 8px; }

.topbar {
  display: flex; align-items: center; justify-content: space-between; gap: 12px; flex-wrap: wrap;
  padding: 10px 16px; background: var(--surface); border-bottom: 1px solid var(--border);
}
.brand { display: flex; align-items: center; gap: 10px; font-weight: 650; font-size: 16px; }
.brand small { font-weight: 400; color: var(--text-2); margin-left: 6px; font-size: 13px; }
.logo {
  display: inline-grid; place-items: center; width: 30px; height: 30px; border-radius: 8px;
  background: var(--accent); color: var(--accent-ink); font-size: 13px; font-weight: 700;
}
.top-controls { display: flex; align-items: center; gap: 8px; }
.top-controls label { color: var(--text-2); }

.tabs {
  display: flex; gap: 2px; padding: 0 12px; background: var(--surface); border-bottom: 1px solid var(--border);
  overflow-x: auto;
}
.tabs a {
  padding: 10px 12px; color: var(--text-2); text-decoration: none; border-bottom: 3px solid transparent;
  white-space: nowrap;
}
.tabs a:hover { color: var(--text); }
.tabs a[aria-current="page"] { color: var(--text); border-bottom-color: var(--accent); font-weight: 600; }

.status { min-height: 0; padding: 0 16px; }
.status:not(:empty) { padding: 8px 16px; background: var(--surface-2); border-bottom: 1px solid var(--border); }
.status.error { background: var(--warn-bg); color: var(--warn-ink); }

main { padding: 16px; max-width: 1440px; margin: 0 auto; }
main:focus { outline: none; }
h1 { font-size: 20px; margin: 4px 0 4px; }
h2 { font-size: 15px; margin: 0 0 8px; }
h3 { font-size: 13px; margin: 14px 0 6px; color: var(--text-2); text-transform: uppercase; letter-spacing: 0.03em; }
.sub { color: var(--text-2); margin: 0 0 12px; }

.card {
  background: var(--surface); border: 1px solid var(--border); border-radius: 10px; padding: 14px;
  margin-bottom: 16px; min-width: 0;
}
.grid2 { display: grid; grid-template-columns: repeat(auto-fit, minmax(420px, 1fr)); gap: 16px; }
.grid2 > .card { margin-bottom: 0; }
.grid2 { margin-bottom: 16px; }

.kpis { display: grid; grid-template-columns: repeat(auto-fill, minmax(200px, 1fr)); gap: 12px; margin-bottom: 16px; }
.kpi { background: var(--surface); border: 1px solid var(--border); border-radius: 10px; padding: 12px 14px; }
.kpi .label { color: var(--text-2); font-size: 12.5px; }
.kpi .value { font-size: 24px; font-weight: 650; margin-top: 2px; font-variant-numeric: tabular-nums; }
.kpi .note { color: var(--muted); font-size: 12.5px; margin-top: 2px; }
.good { color: var(--good); }
.bad { color: var(--bad); }

.chart { width: 100%; height: 300px; }
.chart.tall { height: 440px; }
.chart .fallback { color: var(--muted); padding: 20px; }

.filters { display: flex; flex-wrap: wrap; align-items: flex-end; gap: 10px; margin-bottom: 12px; }
.field { display: flex; flex-direction: column; gap: 4px; }
.field label { font-size: 12.5px; color: var(--text-2); }
input, select, button, .button {
  font: inherit; color: var(--text); background: var(--surface); border: 1px solid var(--border);
  border-radius: 8px; padding: 7px 10px; min-height: 36px;
}
input { min-width: 150px; }
button, .button { cursor: pointer; text-decoration: none; display: inline-flex; align-items: center; }
button.primary { background: var(--accent); color: var(--accent-ink); border-color: var(--accent); font-weight: 600; }
button.ghost, .button.ghost { background: transparent; }
button:disabled { opacity: 0.55; cursor: not-allowed; }

.table-wrap { overflow-x: auto; }
table { border-collapse: collapse; width: 100%; font-variant-numeric: tabular-nums; }
caption { text-align: left; color: var(--text-2); padding-bottom: 6px; }
th, td { padding: 6px 8px; border-bottom: 1px solid var(--grid); text-align: left; white-space: nowrap; }
th { font-weight: 600; color: var(--text-2); font-size: 12.5px; background: var(--surface); position: sticky; top: 0; }
td.num, th.num { text-align: right; }
tbody tr:hover { background: var(--surface-2); }
tr.clickable { cursor: pointer; }
.empty { color: var(--muted); padding: 10px 0; }

.pager { display: flex; gap: 8px; align-items: center; margin-top: 10px; color: var(--text-2); }

.sku-head { display: flex; align-items: baseline; gap: 12px; flex-wrap: wrap; }
.chips { display: flex; gap: 8px; flex-wrap: wrap; }
.chip { background: var(--surface-2); border: 1px solid var(--border); border-radius: 999px; padding: 2px 10px; font-size: 12.5px; }
.sku-layout { display: grid; grid-template-columns: minmax(0, 1fr) 380px; gap: 16px; }
.sku-layout > .card { margin-bottom: 0; }
.side table td, .side table th { padding: 4px 6px; }
.legend-note { color: var(--text-2); font-size: 12.5px; margin-bottom: 4px; }
.swatch { display: inline-block; width: 12px; height: 12px; border-radius: 3px; vertical-align: -1px; margin-right: 4px; }
.warn { background: var(--warn-bg); color: var(--warn-ink); border-radius: 8px; padding: 8px 12px; margin: 8px 0 12px; }

.log {
  background: var(--surface-2); border: 1px solid var(--border); border-radius: 8px; padding: 10px; max-height: 280px;
  overflow: auto; font-size: 12px; white-space: pre-wrap; word-break: break-word; margin: 8px 0 0;
}
.log:empty { display: none; }
.ok-badge, .fail-badge { font-weight: 600; }
.ok-badge { color: var(--good); }
.fail-badge { color: var(--bad); }
.foot { color: var(--muted); padding: 8px 16px 24px; max-width: 1440px; margin: 0 auto; font-size: 12.5px; }

.formula-card { border-left: 4px solid var(--accent); }
.formula { font-size: 22px; font-weight: 650; margin: 2px 0 10px; font-family: "Cambria Math", "STIX Two Math", Georgia, serif; overflow-x: auto; }
.legend-dl { display: grid; grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); gap: 8px 16px; margin: 0 0 10px; }
.legend-dl div { display: flex; gap: 8px; }
.legend-dl dt { font-weight: 700; min-width: 22px; font-family: Georgia, serif; font-size: 16px; }
.legend-dl dd { margin: 0; color: var(--text-2); }
.doc-tabs { display: flex; flex-wrap: wrap; gap: 6px; margin-bottom: 12px; }
.doc-tab { padding: 6px 12px; border: 1px solid var(--border); border-radius: 999px; text-decoration: none; color: var(--text-2); background: var(--surface); }
.doc-tab.active { background: var(--accent); color: var(--accent-ink); border-color: var(--accent); }
.doc { max-width: 980px; }
.doc h2 { font-size: 18px; margin-top: 4px; }
.doc h3 { font-size: 15px; text-transform: none; letter-spacing: 0; color: var(--text); margin-top: 20px; }
.doc h4 { font-size: 14px; margin: 14px 0 6px; }
.doc li { margin: 2px 0; }
.doc td { white-space: normal; }
.doc pre { background: var(--surface-2); border: 1px solid var(--border); border-radius: 8px; padding: 10px; overflow-x: auto; }
.heatmap td.heat { background: color-mix(in srgb, var(--s1) calc(var(--heat, 0) * 55%), transparent); }

@media (max-width: 980px) {
  .sku-layout { grid-template-columns: 1fr; }
}
@media (max-width: 520px) {
  main { padding: 12px 16px; }
  .grid2 { grid-template-columns: 1fr; }
  input { min-width: 0; width: 100%; }
  .field { flex: 1 1 140px; }
  .brand small { display: none; }
}
@media (forced-colors: active) {
  .tabs a[aria-current="page"] { border-bottom-color: CanvasText; }
}

/* ---------- login ---------- */
.login-page { min-height: 100vh; display: grid; place-items: center; padding: 16px; }
.login-card { width: min(360px, 100%); display: grid; gap: 10px; padding: 24px; border-radius: 12px;
  background: var(--card, #fff); border: 1px solid var(--border, #ddd); }
.login-card h1 { margin: 8px 0 4px; font-size: 1.3rem; }
.login-card form { display: grid; gap: 6px; }
.login-card input { padding: 8px 10px; font: inherit; }
.login-card button { margin-top: 10px; padding: 9px; font: inherit; cursor: pointer; }
#login-status.error { color: var(--danger, #c0392b); }