:root {
  color-scheme: light;
  --bg: #f5f6f8; --card: #ffffff; --ink: #1d2433; --muted: #6a7385; --line: #d7dbe3; --track: #e3e6ec;
  --brand: #12345a; --accent: #1f6feb;
  --ok: #1a7f37; --warn: #b26b00; --bad: #c62828;
  --okbg: #e3f4e8; --warnbg: #fff1d6; --badbg: #fde4e4; --greybg: #e8eaf0;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    color-scheme: dark;
    --bg: #12161d; --card: #1b212b; --ink: #e6e9ef; --muted: #98a1b2; --line: #343c4a; --track: #2c3340;
    --brand: #0c1a2c; --accent: #5b9dff;
    --ok: #4cc26b; --warn: #e3a33a; --bad: #ff6b6b;
    --okbg: #1a3324; --warnbg: #3a2e14; --badbg: #3d1e1e; --greybg: #2a303b;
  }
}
* { box-sizing: border-box; }
html, body { margin: 0; }
body { font: 14px/1.45 system-ui, -apple-system, "Segoe UI", Roboto, Arial, sans-serif; background: var(--bg); color: var(--ink); }
a { color: var(--accent); }
h1 { font-size: 22px; margin: 4px 0 12px; } h2 { font-size: 16px; margin: 18px 0 8px; }
code { background: var(--greybg); padding: 0 4px; border-radius: 3px; }
.top { display: flex; flex-wrap: wrap; align-items: center; gap: 6px 18px; background: var(--brand); color: #fff; padding: 8px 16px; }
.top a { color: #dfe7f3; text-decoration: none; }
.brand { font-weight: 600; color: #fff !important; }
.top nav { display: flex; flex-wrap: wrap; gap: 2px 12px; flex: 1; }
.top nav a { padding: 4px 2px; border-bottom: 2px solid transparent; }
.top nav a.on { border-bottom-color: #fff; color: #fff; }
.who { font-size: 13px; color: #dfe7f3; }
.who .link { color: #dfe7f3; }
main { padding: 14px 16px 30px; max-width: 1500px; margin: 0 auto; }
footer { color: var(--muted); font-size: 12px; text-align: center; padding: 10px; }
.card { background: var(--card); border: 1px solid var(--line); border-radius: 8px; padding: 12px 14px; margin-bottom: 14px; }
.narrow { max-width: 560px; }
label { display: block; margin: 8px 0; }
label.inline { display: inline-block; }
input, select, textarea, button { font: inherit; color: inherit; }
input, select, textarea { background: var(--card); border: 1px solid var(--line); border-radius: 5px; padding: 5px 7px; }
label > input:not([type=checkbox]), label > select, label > textarea { display: block; width: 100%; margin-top: 3px; }
button, .button { background: var(--accent); color: #fff; border: 0; border-radius: 5px; padding: 6px 12px; cursor: pointer; text-decoration: none; display: inline-block; }
button.secondary, .button.secondary { background: var(--greybg); color: var(--ink); }
button.danger { background: var(--bad); }
button.small { padding: 3px 8px; font-size: 12px; }
button.link { background: none; padding: 0; color: var(--accent); }
form.inline { display: inline; }
.row { display: flex; flex-wrap: wrap; gap: 10px; align-items: end; margin: 8px 0; }
.muted { color: var(--muted); } .small { font-size: 12px; }
.bad { color: var(--bad); } .okc { color: var(--ok); }
.banner { padding: 8px 12px; border-radius: 6px; margin-bottom: 12px; }
.banner.ok { background: var(--okbg); color: var(--ok); } .banner.bad { background: var(--badbg); color: var(--bad); }
.banner.big { font-size: 17px; font-weight: 600; }
.tbl { width: 100%; border-collapse: collapse; background: var(--card); border: 1px solid var(--line); border-radius: 6px; margin-bottom: 14px; }
@media (max-width: 800px) { .tbl { display: block; overflow-x: auto; } }
.tbl th, .tbl td { text-align: left; padding: 6px 8px; border-bottom: 1px solid var(--line); vertical-align: top; }
.tbl th { font-size: 12px; color: var(--muted); font-weight: 600; }
.tbl .num { text-align: right; font-variant-numeric: tabular-nums; }
.tbl tr.active td { background: var(--badbg); }
.pill { display: inline-block; padding: 1px 8px; border-radius: 10px; font-size: 12px; white-space: nowrap; }
.p-ok { background: var(--okbg); color: var(--ok); } .p-alarm { background: var(--bad); color: #fff; } .p-nodata { background: var(--greybg); color: var(--muted); }
.ackform { display: flex; gap: 4px; } .ackform input { width: 120px; }

/* station states: shared by map markers, pills and the legend */
.st-online { --sc: var(--ok); --sb: var(--okbg); }
.st-equilibrating, .st-warmup { --sc: var(--warn); --sb: var(--warnbg); }
.st-shutdown, .st-pending { --sc: var(--muted); --sb: var(--greybg); }
.st-offline, .st-fault { --sc: var(--bad); --sb: var(--badbg); }
.st-late { --sc: var(--warn); --sb: var(--warnbg); }
.pill.st-online, .pill.st-equilibrating, .pill.st-warmup, .pill.st-shutdown, .pill.st-pending, .pill.st-offline, .pill.st-fault, .pill.st-late { background: var(--sb); color: var(--sc); }

/* map page */
.mapgrid { display: grid; grid-template-columns: minmax(0, 2.2fr) minmax(300px, 1fr); gap: 16px; }
@media (max-width: 1000px) { .mapgrid { grid-template-columns: 1fr; } }
.maphead { display: flex; justify-content: space-between; align-items: baseline; }
.mapwrap { position: relative; width: 100%; border: 1px solid var(--line); border-radius: 8px; overflow: hidden; background: #fff; }
.mapwrap img { display: block; width: 100%; height: auto; }
.pairlines { position: absolute; inset: 0; width: 100%; height: 100%; pointer-events: none; }
.pl { stroke: #8a94a6; stroke-width: 1.5; stroke-dasharray: 4 4; opacity: .55; }
.pl-alarm { stroke: #c62828; stroke-width: 3.5; stroke-dasharray: 10 6; opacity: 1; }
.pl-nodata { opacity: .25; }
.st { position: absolute; transform: translate(-50%, -50%); min-width: 62px; padding: 3px 6px 4px; text-align: center;
  background: #fff; color: #1d2433; border: 2px solid var(--sc); border-radius: 8px; box-shadow: 0 1px 4px rgba(0,0,0,.25); line-height: 1.15; }
.st-shutdown, .st-pending { border-style: dashed; background: #f1f2f5; color: #6a7385; }
.st-offline, .st-fault { background: #fde4e4; }
.st-warmup, .st-equilibrating { background: #fff6e3; }
.stl { font-size: 11px; font-weight: 700; letter-spacing: .3px; }
.stv { font-size: 16px; font-weight: 700; font-variant-numeric: tabular-nums; }
.stv.small { font-size: 10px; font-weight: 600; max-width: 84px; }
.gauge { display: block; width: 50px; height: 28px; margin: 1px auto -2px; }
.rosebox { position: absolute; top: 1%; left: 56.5%; width: 18.5%; min-width: 150px; background: rgba(255,255,255,.94); color: #1d2433;
  border: 1px solid #d7dbe3; border-radius: 8px; padding: 6px 8px; --ink: #1d2433; --line: #d7dbe3; }
.rosebox canvas { width: 100%; height: auto; display: block; }
.rosebox .small { font-size: 11px; line-height: 1.3; }
.rosehead { display: flex; justify-content: space-between; align-items: center; font-size: 12px; }
.seg button { background: #e8eaf0; color: #1d2433; padding: 1px 6px; font-size: 11px; border-radius: 4px; }
.seg button.on { background: #12345a; color: #fff; }
@media (max-width: 700px) { .rosebox { position: static; width: auto; margin: 8px; } }
.legend { display: flex; flex-wrap: wrap; gap: 4px 14px; margin: 8px 0; }
.lg { display: inline-flex; align-items: center; gap: 5px; }
.dot { width: 12px; height: 12px; border-radius: 3px; border: 2px solid var(--sc); background: var(--sb); display: inline-block; }
.lnk { width: 22px; height: 0; border-top: 3px dashed #c62828; display: inline-block; }
.alarm { border-left: 4px solid var(--bad); padding: 4px 8px; margin-bottom: 8px; background: var(--badbg); border-radius: 4px; }
.pr-alarm td { background: var(--badbg); }

/* pair alarm text */
.tokens { margin: 8px 0; }
.tok { background: var(--greybg); color: var(--ink); border: 1px solid var(--line); border-radius: 12px; padding: 1px 8px; margin: 2px; font-size: 12px; }
#ptform textarea { width: 100%; font-family: ui-monospace, Consolas, monospace; }
.preview { font-size: 13px; margin: -4px 0 10px; padding: 6px 8px; background: var(--greybg); border-radius: 5px; }

/* stations placer */
.placer { max-width: 900px; margin-bottom: 12px; }
.placer.picking { cursor: crosshair; outline: 3px solid var(--accent); }
.pin { position: absolute; transform: translate(-50%, -50%); background: #12345a; color: #fff; font-size: 11px; padding: 1px 5px; border-radius: 4px; pointer-events: none; }
tr.picking td { background: var(--warnbg); }

/* data page */
.datagrid { display: grid; grid-template-columns: 260px minmax(0, 1fr); gap: 14px; }
@media (max-width: 900px) { .datagrid { grid-template-columns: 1fr; } }
.chanpanel .full { width: 100%; }
.chanlist { max-height: 620px; overflow-y: auto; margin-top: 6px; }
.cgroup { font-weight: 600; margin: 10px 0 2px; color: var(--muted); }
.citem { display: block; margin: 2px 0; cursor: pointer; }
.datactl { gap: 8px 14px; }
#chartbox { position: relative; }
#chart { display: block; width: 100%; }
.tip { position: absolute; background: var(--card); border: 1px solid var(--line); border-radius: 6px; padding: 6px 8px; font-size: 12px; pointer-events: none; box-shadow: 0 2px 8px rgba(0,0,0,.15); min-width: 180px; }
.sw { display: inline-block; width: 10px; height: 10px; border-radius: 2px; margin-right: 5px; vertical-align: -1px; }
.tblwrap { max-height: 560px; overflow: auto; }
td.flag { background: var(--warnbg); }
.datactl .seg button { background: var(--greybg); color: var(--ink); padding: 3px 10px; }
.datactl .seg button.on { background: var(--brand); color: #fff; }

/* net PM10 */
.netbig { display: flex; align-items: baseline; gap: 8px; margin-bottom: 8px; }
.netv { font-size: 30px; font-weight: 700; font-variant-numeric: tabular-nums; }
.p-alert { background: var(--warnbg); color: var(--warn); }
.st.role-up { box-shadow: 0 0 0 4px #1f6feb, 0 1px 4px rgba(0,0,0,.25); }
.st.role-down { box-shadow: 0 0 0 4px #e9a03b, 0 1px 4px rgba(0,0,0,.25); }
.roletag { position: absolute; top: -17px; left: 50%; transform: translateX(-50%); font-size: 9px; font-weight: 700; letter-spacing: .4px;
  padding: 0 4px; border-radius: 3px; color: #fff; background: #1f6feb; white-space: nowrap; }
.role-down .roletag { background: #e9a03b; }
.pl-net { stroke: #e9a03b; stroke-width: 2.5; stroke-dasharray: 8 5; opacity: .9; }
.pl-alert { stroke: #b26b00; stroke-width: 3; stroke-dasharray: 8 5; opacity: 1; }
.lnk.pl-netk { border-top-color: #e9a03b; }
.rosebox .sigma { font-size: 12px; margin: 2px 0; }
.rosebox .sigma b { font-size: 15px; font-variant-numeric: tabular-nums; }