:root {
  --bg: #0f141b; --panel: #171e28; --panel2: #1d2632; --line: #2a3646;
  --ink: #dbe4ef; --muted: #7d8ea3; --blue: #4b9fff; --orange: #f0964b;
  --green: #4bd08b; --red: #e35d6a; --gray: #8b97a8;
}
* { box-sizing: border-box; margin: 0; }
body {
  background: var(--bg); color: var(--ink);
  font: 14px/1.45 "Segoe UI", system-ui, sans-serif; min-height: 100vh;
}
a { color: var(--blue); text-decoration: none; }
header {
  display: flex; align-items: center; gap: 18px; padding: 10px 18px;
  background: var(--panel); border-bottom: 1px solid var(--line);
}
header .brand { font-weight: 600; letter-spacing: .4px; }
header .brand span { color: var(--blue); }
header nav { display: flex; gap: 14px; }
header nav a { color: var(--muted); padding: 4px 2px; }
header nav a.active, header nav a:hover { color: var(--ink); }
header .spacer { flex: 1; }
header .who { color: var(--muted); font-size: 12.5px; }
main { padding: 16px 18px; max-width: 1400px; margin: 0 auto; }
h2 { font-size: 15px; margin: 0 0 10px; color: var(--ink); font-weight: 600; }
.panel {
  background: var(--panel); border: 1px solid var(--line);
  border-radius: 8px; padding: 14px;
}
.row { display: flex; gap: 16px; align-items: flex-start; }
.grow { flex: 1; min-width: 0; }
button {
  background: var(--blue); color: #08111d; border: 0; border-radius: 6px;
  padding: 7px 14px; font-weight: 600; cursor: pointer; font-size: 13px;
}
button.ghost { background: var(--panel2); color: var(--ink); border: 1px solid var(--line); }
button.danger { background: var(--red); color: #fff; }
button:disabled { opacity: .45; cursor: default; }
input, select, textarea {
  background: var(--panel2); color: var(--ink); border: 1px solid var(--line);
  border-radius: 6px; padding: 7px 9px; font-size: 13px;
}
textarea { width: 100%; font: 12.5px/1.5 Consolas, monospace; }
table { border-collapse: collapse; width: 100%; }
th, td { text-align: left; padding: 7px 10px; border-bottom: 1px solid var(--line); }
th { color: var(--muted); font-weight: 500; font-size: 12px; text-transform: uppercase; }
.badge {
  display: inline-block; padding: 1px 8px; border-radius: 10px;
  font-size: 11px; font-weight: 600; letter-spacing: .3px;
}
.badge.sim { background: #3a2f16; color: var(--orange); }
.badge.real { background: #16324a; color: var(--blue); }
.badge.role { background: var(--panel2); color: var(--muted); }
.dot { display: inline-block; width: 9px; height: 9px; border-radius: 50%; margin-right: 6px; }
.dot.online { background: var(--green); }
.dot.stale { background: var(--orange); }
.dot.offline { background: var(--red); }
.dot.idle { background: var(--gray); }
.dot.standby { background: #4a6285; }
.dot.starting { background: var(--blue); }
.muted { color: var(--muted); }
.kv { display: grid; grid-template-columns: auto 1fr; gap: 3px 14px; font-size: 13px; }
.kv .k { color: var(--muted); }
/* Group heading inside a device panel. Twenty fields in one flat list is not
   more informative than six; these name the question each group answers. */
.devsec { margin: 10px 0 4px; font-size: 10.5px; letter-spacing: 0.09em;
  text-transform: uppercase; color: var(--muted); border-bottom: 1px solid var(--line);
  padding-bottom: 3px; }
canvas { background: #0a0f15; border: 1px solid var(--line); border-radius: 8px; width: 100%; }
.msg { margin-top: 8px; font-size: 12.5px; min-height: 18px; }
.msg.ok { color: var(--green); } .msg.err { color: var(--red); white-space: pre-wrap; }
.login-wrap { display: grid; place-items: center; min-height: 100vh; }
.login-box { width: 340px; }
.login-box .panel { display: flex; flex-direction: column; gap: 10px; }
.status-line { font-size: 13px; color: var(--muted); margin-top: 6px; }
.mono { font-family: Consolas, monospace; font-size: 12.5px; }

/* connection badge (header) */
.conn { font-size: 11px; font-weight: 700; letter-spacing: .6px; padding: 2px 9px;
  border-radius: 10px; }
.conn.live { background: #143526; color: var(--green); }
.conn.reconnecting { background: #3a2020; color: var(--red);
  animation: connpulse 1.2s ease-in-out infinite; }
@keyframes connpulse { 50% { opacity: .45; } }

/* event feed */
.events { max-height: 180px; overflow-y: auto; font-size: 12px; }
.evt { display: flex; gap: 8px; padding: 2px 0; border-bottom: 1px solid #131b26;
  align-items: baseline; }
.evt-t { color: var(--muted); font-family: Consolas, monospace; font-size: 11px;
  flex: none; }
.evt-src { color: var(--blue); flex: none; min-width: 76px; }
.evt.warning .evt-src { color: var(--orange); }
.evt.error .evt-src { color: var(--red); }
.evt-x { color: var(--ink); }
.evt.warning .evt-x { color: var(--orange); }
.evt.error .evt-x { color: var(--red); }

/* help page */
.help h3 { font-size: 14px; margin: 18px 0 6px; color: var(--blue); }
.help p, .help li { font-size: 13px; color: var(--ink); }
.help ul { margin: 4px 0 8px 20px; padding: 0; }
.help dt { color: var(--blue); font-weight: 600; font-size: 13px; margin-top: 8px; }
.help dd { margin: 1px 0 4px 0; font-size: 13px; color: var(--ink); }
.help kbd { background: var(--panel2); border: 1px solid var(--line);
  border-radius: 4px; padding: 0 6px; font: 12px Consolas, monospace; }
.help .swatch { display: inline-block; width: 10px; height: 10px;
  border-radius: 50%; margin-right: 5px; }

/* config schema reference */
.schemaref details { margin-bottom: 6px; }
.schemaref summary { cursor: pointer; color: var(--blue); font-size: 13px;
  padding: 3px 0; }
.schemaref .sdesc { color: var(--muted); font-size: 12px; margin: 3px 0 6px; }
.schemaref table { font-size: 12px; margin-bottom: 6px; }
.schemaref td, .schemaref th { padding: 3px 8px; }

.maphint { font-size: 11.5px; color: var(--muted); }

/* header ops clock: local + UTC offset + Zulu */
.clock { font-family: Consolas, monospace; font-size: 12.5px; color: var(--ink); }
.clock .muted { font-size: 10.5px; }
.clock .zulu { color: var(--blue); font-size: 11.5px; margin-left: 4px; }

/* operating-mode banner — unmistakable at a glance */
.modebanner { margin-bottom: 12px; padding: 7px 14px; border-radius: 8px;
  font-weight: 700; letter-spacing: .8px; font-size: 13px; border: 1px solid;
  display: flex; align-items: center; gap: 10px; }

/* conditions chip (in the banner): how optimal for passive optical */
.cond { font-size: 11.5px; font-weight: 700; letter-spacing: .4px;
  padding: 1px 9px; border-radius: 10px; cursor: help; }
.cond.good { background: #143526; color: var(--green); }
.cond.fair { background: #3a2f14; color: var(--orange); }
.cond.poor { background: #3a1418; color: #ff8d96; }
.cond.unknown { background: var(--panel2); color: var(--muted); }
.modebanner.mode-live { background: #3a1418; color: #ff8d96; border-color: #7c2a32;
  animation: livepulse 2.4s ease-in-out infinite; }
@keyframes livepulse { 50% { background: #47181d; } }
.modebanner.mode-sim { background: #3a2f14; color: var(--orange); border-color: #6d5623; }
.modebanner.mode-replay { background: #232a33; color: var(--gray); border-color: var(--line); }
.modebanner.mode-idle { background: var(--panel); color: var(--muted); border-color: var(--line); }

/* 2D/3D view toggle */
.viewbar { display: flex; gap: 6px; margin-bottom: 8px; align-items: center; }
.viewbtn { background: var(--panel2); color: var(--muted); border: 1px solid var(--line);
  padding: 5px 14px; font-size: 12.5px; }
.viewbtn.active { background: #16324a; color: var(--blue); border-color: #2b5a83; }

/* run-control tabs */
.tabbar { display: flex; gap: 6px; margin-bottom: 10px; }
.tab { background: transparent; color: var(--muted); border: 0;
  border-bottom: 2px solid transparent; border-radius: 0; padding: 4px 10px;
  font-size: 13px; }
.tab.active { color: var(--ink); border-bottom-color: var(--blue); }
#tablive.active { color: #ff8d96; border-bottom-color: var(--red); }
.live-btn { background: var(--red); color: #fff; }

/* map layers popover */
.layerspanel { position: absolute; right: 0; top: 34px; z-index: 20;
  background: var(--panel); border: 1px solid var(--line); border-radius: 8px;
  padding: 10px 14px; display: flex; flex-direction: column; gap: 5px;
  box-shadow: 0 6px 18px rgba(0,0,0,.45); min-width: 170px; }
.layerspanel label { display: flex; align-items: center; gap: 8px;
  font-size: 12.5px; cursor: pointer; color: var(--ink); }
.layerspanel input { accent-color: var(--blue); }

/* data-provenance watermark over the 3D view (2D draws its own on canvas):
   a corner tag, not a splash — the mode banner carries the detail. */
.watermark { position: absolute; top: 10px; left: 14px; pointer-events: none;
  font-size: 15px; font-weight: 800; letter-spacing: 2px;
  color: rgba(240, 150, 75, 0.55); user-select: none; }

/* M5 track table */
#tracktable { overflow-x: auto; }  /* wide rows scroll inside the panel */
table.tracks { width: 100%; border-collapse: collapse; font-size: 12px; }
table.tracks th { text-align: left; color: var(--muted); font-weight: 500;
  padding: 2px 4px; border-bottom: 1px solid var(--line); }
table.tracks td { padding: 3px 4px; border-bottom: 1px solid #131b26; }
table.tracks tr[data-id] { cursor: pointer; }
table.tracks tr.selrow td { background: #16202e; }
table.tracks select.identity { background: var(--panel2); color: inherit;
  border: 1px solid var(--line); border-radius: 4px; font-size: 11px; padding: 1px 2px;
  max-width: 88px; }

/* alert strip (tasks/gcs-alerting-evidence.md) */
#alertstrip { font-size: 13px; }
#alertstrip button.ackbtn { background: #2a1215; color: #e35d6a; border: 1px solid #e35d6a;
  border-radius: 3px; padding: 1px 8px; cursor: pointer; font-weight: 600; }
#alertstrip button.ackbtn:hover { background: #3a181d; }
@keyframes alertpulse { 50% { opacity: .55; } }