:root {
  --bg: #f5f6f8; --card: #ffffff; --fg: #1d2129; --muted: #6b7280; --line: #e5e7eb; --grid: #eef0f3;
  --accent: #e5322d; --accent-fg: #ffffff; --good: #16833a; --bad: #c62828; --input: #ffffff;
  --success: #16833a; --success-fg: #ffffff;
  color-scheme: light;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #14161a; --card: #1d2026; --fg: #e6e8eb; --muted: #9aa1ab; --line: #2d313a; --grid: #262a31;
    --accent: #f0453f; --good: #4cc274; --bad: #ff6b6b; --input: #15171b; --success: #2a9a52; color-scheme: dark;
  }
}
:root[data-theme="dark"] {
  --bg: #14161a; --card: #1d2026; --fg: #e6e8eb; --muted: #9aa1ab; --line: #2d313a; --grid: #262a31;
  --accent: #f0453f; --good: #4cc274; --bad: #ff6b6b; --input: #15171b; --success: #2a9a52; color-scheme: dark;
}

* { box-sizing: border-box; }
body { margin: 0; background: var(--bg); color: var(--fg);
  font: 15px/1.45 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif; }
a { color: inherit; }
main { max-width: 1200px; margin: 0 auto; padding: 16px; }
h1 { font-size: 22px; margin: 0 0 8px; }
h2 { font-size: 17px; margin: 0 0 12px; }

.topbar { display: flex; align-items: center; justify-content: space-between; gap: 12px;
  padding: 10px 16px; background: var(--card); border-bottom: 1px solid var(--line); }
.brand { font-weight: 700; text-decoration: none; color: var(--accent); }
.topbar { flex-wrap: wrap; }
.topbar nav { display: flex; flex-wrap: wrap; gap: 6px 16px; align-items: center; }
.topbar nav a { text-decoration: none; }
.topbar form { margin: 0; }

.card { background: var(--card); border: 1px solid var(--line); border-radius: 10px; padding: 16px; margin-bottom: 16px; }
.narrow { max-width: 480px; }
.login { max-width: 360px; margin: 12vh auto 0; display: flex; flex-direction: column; gap: 12px; }

input { width: 100%; padding: 9px 11px; border: 1px solid var(--line); border-radius: 7px;
  background: var(--input); color: var(--fg); font: inherit; }
label { display: flex; flex-direction: column; gap: 4px; font-size: 14px; margin-bottom: 8px; }
button { padding: 8px 14px; border: 1px solid var(--line); border-radius: 7px; background: var(--card);
  color: var(--fg); font: inherit; cursor: pointer; }
a.btn { display: inline-block; padding: 8px 14px; border: 1px solid var(--line); border-radius: 7px;
  background: var(--card); color: var(--fg); text-decoration: none; line-height: normal; }
a.btn:hover, button:hover { border-color: var(--muted); }
a.btn.success { background: var(--success); border-color: var(--success); color: var(--success-fg); font-weight: 600; }
a.btn.success:hover { filter: brightness(1.08); }
button.primary { background: var(--accent); border-color: var(--accent); color: var(--accent-fg); font-weight: 600; }
button.danger { color: var(--bad); }
button.link { border: 0; background: none; padding: 0; color: inherit; }

.add { display: flex; gap: 8px; }
.add input { flex: 1; }
.add .add-group { max-width: 220px; }
.muted { color: var(--muted); }
.small { font-size: 13px; }
.center { text-align: center; }
.strong { font-weight: 600; }
.error { color: var(--bad); }
.good { color: var(--good); }
.bad { color: var(--bad); }
.down { color: var(--good); }
.up { color: var(--bad); }
.tag { font-size: 12px; padding: 1px 6px; border-radius: 4px; background: var(--grid); color: var(--muted); margin-left: 6px; }

.pending { display: flex; align-items: center; gap: 8px; color: var(--muted); }
.spinner { width: 14px; height: 14px; border: 2px solid var(--line); border-top-color: var(--accent);
  border-radius: 50%; animation: spin .8s linear infinite; }
@keyframes spin { to { transform: rotate(360deg); } }

select { padding: 6px 8px; border: 1px solid var(--line); border-radius: 7px; background: var(--input);
  color: var(--fg); font: inherit; max-width: 100%; }
.group-select { font-size: 13px; padding: 3px 6px; max-width: 160px; }
form.inline { display: flex; gap: 6px; align-items: center; margin: 0; }
form.inline input { width: auto; flex: 1; min-width: 0; }
.inline-label { flex-direction: row; align-items: center; gap: 6px; margin: 0; }
label.check { flex-direction: row; align-items: center; gap: 6px; white-space: nowrap; }
label.check input { width: auto; }
.actions { flex-wrap: wrap; align-items: center; }

.tabs { display: flex; flex-wrap: wrap; gap: 6px; align-items: center; margin-bottom: 12px; }
.tabs > a { text-decoration: none; padding: 6px 12px; border-radius: 999px; border: 1px solid var(--line);
  background: var(--card); font-size: 14px; }
.tabs > a.on { background: var(--fg); color: var(--bg); border-color: var(--fg); }
.count { font-size: 12px; color: var(--muted); font-weight: 400; margin-left: 2px; }
.tabs > a.on .count { color: inherit; opacity: .7; }
.tabs-spacer { flex: 1; }
.tabs > a.manage { border: 0; background: none; color: var(--muted); text-decoration: underline; padding: 6px 4px; }
.new-group { position: relative; }
.new-group summary { cursor: pointer; list-style: none; padding: 6px 12px; border-radius: 999px;
  border: 1px solid var(--accent); color: var(--accent); font-size: 14px; font-weight: 600; background: var(--card); }
.new-group summary::-webkit-details-marker { display: none; }
.new-group form { position: absolute; z-index: 5; top: calc(100% + 6px); right: 0; display: flex; gap: 6px;
  background: var(--card); border: 1px solid var(--line); border-radius: 10px; padding: 10px; width: 320px;
  max-width: calc(100vw - 32px); box-shadow: 0 6px 20px rgba(0, 0, 0, .12); }
.group-bar { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 12px; }
.group-bar form.inline input { width: 260px; flex: none; }
h2 a { text-decoration: none; }

.add-user .row { display: flex; flex-wrap: wrap; gap: 10px; align-items: flex-end; }
.add-user .row label { margin: 0; flex: 1; min-width: 160px; }
.add-user .row label.check { flex: none; padding-bottom: 9px; }

.notify-opts { display: flex; flex-wrap: wrap; gap: 8px 24px; align-items: center; margin-bottom: 12px; }
.notify-opts label { margin: 0; }
.threshold input { width: 130px; padding: 5px 8px; }
.bell { font-size: 12px; margin-left: 4px; }

.table-wrap { overflow-x: auto; }
table { width: 100%; border-collapse: collapse; }
th, td { padding: 8px 10px; border-bottom: 1px solid var(--line); text-align: left; vertical-align: middle; }
th { font-size: 12px; text-transform: uppercase; letter-spacing: .03em; color: var(--muted); font-weight: 600; }
tr:last-child td { border-bottom: 0; }
.num { text-align: right; white-space: nowrap; font-variant-numeric: tabular-nums; }
table.products tbody tr { cursor: pointer; }
table.products tbody tr:hover { background: var(--grid); }
tr.inactive { opacity: .55; }
td.thumb { width: 52px; }
td.thumb img { width: 40px; height: 40px; object-fit: contain; border-radius: 6px; background: #fff; }

.product-head { display: flex; gap: 20px; }
.product-head .cover { width: 140px; height: 140px; object-fit: contain; border-radius: 8px; background: #fff; flex-shrink: 0; }
.product-head .info { flex: 1; min-width: 0; }
.stats { display: flex; flex-wrap: wrap; gap: 24px; margin: 12px 0; }
.stats .label { display: block; font-size: 12px; color: var(--muted); }
.stats .value { font-size: 20px; font-weight: 600; font-variant-numeric: tabular-nums; }
.actions { display: flex; gap: 8px; }
.actions form { margin: 0; }

.chart-head { display: flex; justify-content: space-between; align-items: center; gap: 12px; flex-wrap: wrap; margin-bottom: 8px; }
.chart-head h2 { margin: 0; }
.seg { display: inline-flex; border: 1px solid var(--line); border-radius: 7px; overflow: hidden; }
.seg button { border: 0; border-radius: 0; padding: 5px 12px; }
.seg button.on { background: var(--fg); color: var(--bg); }
.chart-box { position: relative; height: 380px; }

.grid2 { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.grid2 .card { margin-bottom: 0; }
.grid2 + .card { margin-top: 16px; }

@media (max-width: 800px) {
  .topbar nav { gap: 6px 12px; font-size: 14px; }
  .group-bar form.inline input { width: auto; flex: 1; }
  .tabs-spacer { display: none; }
  .grid2 { grid-template-columns: 1fr; }
  .product-head { flex-direction: column; }
  .product-head .cover { width: 100px; height: 100px; }
  .add { flex-direction: column; }
  .add .add-group { max-width: none; }
  .chart-box { height: 300px; }
  th, td { padding: 6px; }
}