:root {
  --bg: #0d1117; --panel: #151b23; --panel-2: #1b2330; --line: #262e3b;
  --text: #e6edf3; --muted: #8b98a9; --dim: #5d6b7d;
  --a: #4f7cff; --b: #12b886; --warn: #f0883e; --bad: #f85149; --good: #3fb950;
  --radius: 10px;
  --mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, monospace;
}
* { box-sizing: border-box; }
body {
  margin: 0; background: var(--bg); color: var(--text);
  font: 14px/1.5 -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  -webkit-font-smoothing: antialiased;
}
[hidden] { display: none !important; }
a { color: var(--a); }

/* ---------- login gate ---------- */
#login-view { display: grid; place-items: center; min-height: 100vh; padding: 24px; }
.login-card {
  width: 100%; max-width: 360px; background: var(--panel); border: 1px solid var(--line);
  border-radius: 14px; padding: 32px;
}
.login-card h1 { margin: 0 0 4px; font-size: 22px; letter-spacing: -0.02em; }
.login-card p.sub { margin: 0 0 24px; color: var(--muted); font-size: 13px; }
label { display: block; font-size: 12px; color: var(--muted); margin: 0 0 6px; font-weight: 500; }
input, select {
  width: 100%; padding: 10px 12px; background: var(--bg); border: 1px solid var(--line);
  border-radius: 8px; color: var(--text); font-size: 14px; font-family: inherit;
}
input:focus, select:focus { outline: none; border-color: var(--a); }
.field { margin-bottom: 16px; }
button {
  padding: 10px 16px; background: var(--a); color: #fff; border: 0; border-radius: 8px;
  font-size: 14px; font-weight: 600; cursor: pointer; font-family: inherit;
}
button:hover { filter: brightness(1.1); }
button.ghost { background: transparent; border: 1px solid var(--line); color: var(--muted); font-weight: 500; }
button.ghost:hover { color: var(--text); border-color: var(--dim); filter: none; }
button.full { width: 100%; }
.error { color: var(--bad); font-size: 13px; margin-top: 12px; min-height: 18px; }

/* ---------- shell ---------- */
header {
  display: flex; align-items: center; gap: 16px; padding: 14px 24px;
  border-bottom: 1px solid var(--line); background: var(--panel); position: sticky; top: 0; z-index: 20;
}
.brand { font-weight: 700; font-size: 16px; letter-spacing: -0.01em; }
.brand span { color: var(--muted); font-weight: 400; margin-left: 8px; font-size: 13px; }
.spacer { flex: 1; }
.live { display: flex; align-items: center; gap: 7px; font-size: 12px; color: var(--muted); }
.dot { width: 8px; height: 8px; border-radius: 50%; background: var(--dim); }
.dot.on { background: var(--good); box-shadow: 0 0 0 3px rgba(63,185,80,.16); }
main { padding: 24px; max-width: 1400px; margin: 0 auto; }

/* ---------- stat strip ---------- */
.stats { display: grid; grid-template-columns: repeat(auto-fit, minmax(150px, 1fr)); gap: 12px; margin-bottom: 20px; }
.stat { background: var(--panel); border: 1px solid var(--line); border-radius: var(--radius); padding: 14px 16px; }
.stat .k { font-size: 11px; color: var(--muted); text-transform: uppercase; letter-spacing: .06em; font-weight: 600; }
.stat .v { font-size: 24px; font-weight: 700; margin-top: 4px; letter-spacing: -0.02em; }
.stat .v small { font-size: 13px; color: var(--muted); font-weight: 500; }
.stat.alert .v { color: var(--warn); }

/* ---------- user cards ---------- */
.users { display: grid; grid-template-columns: repeat(auto-fit, minmax(320px, 1fr)); gap: 12px; margin-bottom: 20px; }
.user-card { background: var(--panel); border: 1px solid var(--line); border-radius: var(--radius); padding: 18px; position: relative; overflow: hidden; }
.user-card::before { content: ''; position: absolute; inset: 0 auto 0 0; width: 3px; background: var(--accent); }
.user-card h3 { margin: 0; font-size: 16px; display: flex; align-items: center; gap: 8px; }
.pill { font-size: 11px; font-weight: 600; padding: 2px 8px; border-radius: 20px; text-transform: uppercase; letter-spacing: .04em; }
.pill.online { background: rgba(63,185,80,.15); color: var(--good); }
.pill.offline { background: rgba(139,152,169,.12); color: var(--muted); }
.kv { display: grid; grid-template-columns: 1fr auto; gap: 6px 12px; margin-top: 14px; font-size: 13px; }
.kv dt { color: var(--muted); }
.kv dd { margin: 0; text-align: right; font-variant-numeric: tabular-nums; }

/* ---------- tabs + panels ---------- */
nav.tabs { display: flex; gap: 4px; border-bottom: 1px solid var(--line); margin-bottom: 16px; flex-wrap: wrap; }
nav.tabs button {
  background: transparent; color: var(--muted); border: 0; border-bottom: 2px solid transparent;
  border-radius: 0; padding: 10px 14px; font-weight: 500;
}
nav.tabs button.active { color: var(--text); border-bottom-color: var(--a); }
nav.tabs button:hover { color: var(--text); filter: none; }

.panel { background: var(--panel); border: 1px solid var(--line); border-radius: var(--radius); overflow: hidden; }
.panel-head { display: flex; align-items: center; gap: 10px; padding: 12px 16px; border-bottom: 1px solid var(--line); flex-wrap: wrap; }
.panel-head h2 { margin: 0; font-size: 14px; font-weight: 600; }
.panel-head select { width: auto; padding: 6px 10px; font-size: 13px; }
.scroll { overflow-x: auto; max-height: 620px; overflow-y: auto; }

table { width: 100%; border-collapse: collapse; font-size: 13px; }
th {
  text-align: left; padding: 9px 14px; color: var(--muted); font-weight: 600; font-size: 11px;
  text-transform: uppercase; letter-spacing: .05em; background: var(--panel-2);
  position: sticky; top: 0; z-index: 1; white-space: nowrap;
}
td { padding: 9px 14px; border-top: 1px solid var(--line); vertical-align: top; }
tbody tr:hover { background: rgba(255,255,255,.02); }
.mono { font-family: var(--mono); font-size: 12px; }
.num { font-variant-numeric: tabular-nums; text-align: right; }
.tag { display: inline-block; padding: 1px 7px; border-radius: 5px; font-size: 11px; font-weight: 600; }
.tag.A { background: rgba(79,124,255,.16); color: #85a5ff; }
.tag.B { background: rgba(18,184,134,.16); color: #4ad3a4; }
.tag.text { background: rgba(139,152,169,.14); color: var(--muted); }
.tag.voice { background: rgba(240,136,62,.16); color: var(--warn); }
.tag.image { background: rgba(163,113,247,.16); color: #b98cff; }
.tag.file { background: rgba(56,169,255,.16); color: #6cb6ff; }
.tag.live { background: rgba(63,185,80,.15); color: var(--good); }
.tag.ok { background: rgba(63,185,80,.15); color: var(--good); }
.tag.fail { background: rgba(248,81,73,.15); color: var(--bad); }
.muted { color: var(--muted); }
.empty { padding: 40px; text-align: center; color: var(--dim); }

/* ---------- message content ---------- */
.msg-body { max-width: 440px; word-break: break-word; white-space: pre-wrap; }
.thumb { max-height: 68px; max-width: 120px; border-radius: 6px; border: 1px solid var(--line); display: block; cursor: zoom-in; }
/* Chrome's default audio widget is light; tone it down to match the console. */
audio { height: 32px; max-width: 230px; vertical-align: middle;
  filter: invert(0.92) hue-rotate(180deg) saturate(0.55) contrast(0.95); }
.voice-cell { display: flex; align-items: center; gap: 10px; }
.file-chip { display: inline-flex; align-items: center; gap: 8px; padding: 6px 10px; background: var(--panel-2); border: 1px solid var(--line); border-radius: 8px; text-decoration: none; color: var(--text); }
.file-chip small { color: var(--muted); }

/* ---------- charts ---------- */
.charts { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 12px; }
@media (max-width: 900px) { .charts { grid-template-columns: 1fr; } }
.chart-card { background: var(--panel); border: 1px solid var(--line); border-radius: var(--radius); padding: 16px; }
.chart-card h3 { margin: 0 0 4px; font-size: 14px; font-weight: 600; }
.chart-card p { margin: 0 0 14px; font-size: 12px; color: var(--muted); }
.legend { display: flex; gap: 14px; flex-wrap: wrap; font-size: 12px; color: var(--muted); margin-top: 10px; }
.legend i { display: inline-block; width: 9px; height: 9px; border-radius: 2px; margin-right: 5px; vertical-align: -1px; }
svg { display: block; width: 100%; overflow: visible; }
.heat rect { rx: 2; }

/* ---------- lightbox ---------- */
#lightbox { position: fixed; inset: 0; background: rgba(0,0,0,.88); display: grid; place-items: center; z-index: 60; padding: 40px; cursor: zoom-out; }
#lightbox img { max-width: 100%; max-height: 100%; border-radius: 8px; }

@media (max-width: 640px) {
  main, header { padding: 14px; }
  .stat .v { font-size: 20px; }
}

/* ---------- login photo gallery ---------- */
.photo-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(190px, 1fr)); gap: 12px; padding: 16px; }
.photo-card { background: var(--panel-2); border: 1px solid var(--line); border-radius: var(--radius); overflow: hidden; }
.photo-card .shot { width: 100%; aspect-ratio: 3 / 4; object-fit: cover; background: var(--bg); display: block; cursor: zoom-in; }
.photo-card .meta { padding: 9px 11px; }
.photo-card .meta .row { display: flex; align-items: center; justify-content: space-between; gap: 8px; }
.photo-card .meta .when { font-size: 12px; color: var(--text); font-variant-numeric: tabular-nums; }
.photo-card .meta .sub { font-size: 11px; color: var(--muted); margin-top: 3px; line-height: 1.4; word-break: break-word; }