/* VRFBusTap viewer — an instrument panel, not a dashboard.
   Palette: cold slate ground, signal colours per direction:
   rx amber (the wire talking), tx cyan (us), txm dim violet (muted), evt green. */
:root {
  --bg: #0f1216; --panel: #151a20; --panel-2: #1b222a; --line: #26303a;
  --fg: #d6dde5; --muted: #7f8b97; --accent: #5cc8ff;
  --rx: #ffb454; --tx: #5cc8ff; --txm: #a58bff; --evt: #7fd88f; --mark: #ff6b8b;
  --ok: #4ad275; --warn: #ffb454; --bad: #ff5c5c;
  --mono: ui-monospace, "JetBrains Mono", "SF Mono", Menlo, Consolas, monospace;
  --sans: -apple-system, "Segoe UI", Inter, Roboto, system-ui, sans-serif;
  color-scheme: dark;
}
@media (prefers-color-scheme: light) {
  :root:not([data-theme="dark"]) {
    --bg: #f3f5f7; --panel: #ffffff; --panel-2: #eef1f4; --line: #d7dde3;
    --fg: #1a2129; --muted: #63707c; --accent: #0b74c4;
    --rx: #b86a00; --tx: #0b74c4; --txm: #6a4fd8; --evt: #1f8a3f; --mark: #c8264d;
    color-scheme: light;
  }
}
* { box-sizing: border-box; }
html, body { height: 100%; }
body {
  margin: 0; background: var(--bg); color: var(--fg); font: 13px/1.4 var(--sans);
  display: flex; flex-direction: column;
}
.mono { font-family: var(--mono); font-variant-numeric: tabular-nums; }
.muted { color: var(--muted); }
.hidden { display: none !important; }
code { font-family: var(--mono); background: var(--panel-2); padding: 0 4px; border-radius: 3px; }
button, select, input {
  font: inherit; color: inherit; background: var(--panel-2); border: 1px solid var(--line);
  border-radius: 6px; padding: 5px 10px;
}
button { cursor: pointer; }
button:hover { border-color: var(--accent); }
button:focus-visible, input:focus-visible, select:focus-visible { outline: 2px solid var(--accent); outline-offset: 1px; }
button.ghost { background: transparent; }
button.small { padding: 3px 8px; font-size: 12px; }
#btn-marker { background: var(--mark); color: #fff; border-color: transparent; font-weight: 600; }

/* header */
.top {
  display: flex; align-items: center; justify-content: space-between; gap: 12px;
  padding: 8px 16px; padding-top: calc(8px + env(safe-area-inset-top, 0px));
  border-bottom: 1px solid var(--line); background: var(--panel);
}
.brand { display: flex; align-items: center; gap: 10px; font-size: 15px; }
.top-right { display: flex; align-items: center; gap: 12px; }
.dot { width: 9px; height: 9px; border-radius: 50%; background: var(--bad); display: inline-block; }
.dot.on { background: var(--ok); box-shadow: 0 0 0 3px color-mix(in srgb, var(--ok) 25%, transparent); }
.dot.wait { background: var(--warn); }

/* layout */
.layout { flex: 1; display: grid; grid-template-columns: 260px 1fr; min-height: 0; }
.side { border-right: 1px solid var(--line); background: var(--panel); display: flex; flex-direction: column; min-height: 0; }
.side-head { display: flex; justify-content: space-between; align-items: center; padding: 10px 14px; font-weight: 600; border-bottom: 1px solid var(--line); }
.side-foot { padding: 12px 14px; font-size: 12px; }
.gw-list { list-style: none; margin: 0; padding: 6px; overflow: auto; flex: 1; }
.gw-item { display: grid; grid-template-columns: 12px 1fr auto; gap: 8px; align-items: center; padding: 8px 8px; border-radius: 6px; cursor: pointer; }
.gw-item:hover { background: var(--panel-2); }
.gw-item.sel { background: color-mix(in srgb, var(--accent) 18%, transparent); outline: 1px solid color-mix(in srgb, var(--accent) 50%, transparent); }
.gw-item .name { font-weight: 600; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.gw-item .sub { font-size: 11px; color: var(--muted); font-family: var(--mono); }
.pill { font-size: 10px; padding: 1px 6px; border-radius: 10px; background: var(--evt); color: #06210d; font-weight: 700; letter-spacing: .02em; }

.main { display: flex; flex-direction: column; min-height: 0; min-width: 0; }
.bar { display: flex; align-items: center; gap: 10px; padding: 8px 12px; border-bottom: 1px solid var(--line); flex-wrap: wrap; }
.seg { display: inline-flex; border: 1px solid var(--line); border-radius: 6px; overflow: hidden; }
.seg-btn { border: 0; border-radius: 0; background: transparent; padding: 5px 12px; }
.seg-btn.on { background: var(--accent); color: #041018; font-weight: 600; }
.filters { display: flex; align-items: center; gap: 10px; flex-wrap: wrap; }
.filters label { display: inline-flex; align-items: center; gap: 4px; cursor: pointer; }
.filters input[type=checkbox] { margin: 0; }
#filter-hex { width: 200px; padding: 4px 8px; }
.spacer { flex: 1; }
.check { display: inline-flex; gap: 6px; align-items: center; }

.badge { font-family: var(--mono); font-size: 11px; padding: 1px 6px; border-radius: 4px; font-weight: 700; text-transform: uppercase; letter-spacing: .04em; }
.badge.rx { background: color-mix(in srgb, var(--rx) 22%, transparent); color: var(--rx); }
.badge.tx { background: color-mix(in srgb, var(--tx) 22%, transparent); color: var(--tx); }
.badge.txm { background: color-mix(in srgb, var(--txm) 22%, transparent); color: var(--txm); }
.badge.evt { background: color-mix(in srgb, var(--evt) 22%, transparent); color: var(--evt); }
.badge.mark { background: color-mix(in srgb, var(--mark) 22%, transparent); color: var(--mark); }

.head { display: flex; gap: 18px; padding: 8px 12px; border-bottom: 1px solid var(--line); background: var(--panel); flex-wrap: wrap; align-items: center; }
.kv { display: flex; flex-direction: column; gap: 1px; min-width: 0; }
.kv .k { font-size: 10px; text-transform: uppercase; letter-spacing: .08em; color: var(--muted); }
.kv .v { font-size: 13px; }
.kv.grow { flex: 1; }
.export a { color: var(--accent); margin-left: 10px; font-size: 12px; text-decoration: none; }
.export a:hover { text-decoration: underline; }

.stream { flex: 1; overflow: auto; position: relative; }
.tbl { width: 100%; border-collapse: collapse; font-family: var(--mono); font-size: 12px; font-variant-numeric: tabular-nums; }
.tbl th { position: sticky; top: 0; background: var(--panel-2); text-align: left; padding: 6px 8px; font-weight: 600; color: var(--muted); border-bottom: 1px solid var(--line); z-index: 1; }
.tbl td { padding: 3px 8px; border-bottom: 1px solid color-mix(in srgb, var(--line) 50%, transparent); vertical-align: top; white-space: pre-wrap; word-break: break-all; }
.c-ts { width: 118px; } .c-te { width: 120px; text-align: right; } .c-dir { width: 46px; } .c-n { width: 40px; text-align: right; } .c-asc { width: 26ch; color: var(--muted); }
tr.rx td.hex { color: var(--rx); } tr.tx td.hex { color: var(--tx); } tr.txm td.hex { color: var(--txm); opacity: .8; }
tr.evt td { color: var(--evt); font-style: italic; }
tr.mark td { color: var(--mark); font-weight: 600; background: color-mix(in srgb, var(--mark) 8%, transparent); }
tr.sys td { color: var(--muted); font-style: italic; }
.empty { padding: 40px; text-align: center; }

.marker { display: flex; gap: 8px; padding: 8px 12px; padding-bottom: calc(8px + env(safe-area-inset-bottom, 0px)); border-top: 1px solid var(--line); background: var(--panel); flex-wrap: wrap; align-items: center; }
#marker-note { flex: 1; min-width: 200px; }
#marker-author { width: 110px; }
.mk-start { background: var(--evt); color: #06210d; border-color: transparent; font-weight: 600; }
.mk-stop  { background: var(--mark); color: #fff; border-color: transparent; font-weight: 600; }
.mk-stop:disabled { opacity: .45; cursor: not-allowed; }
.open-start { font-family: var(--mono); font-size: 12px; color: var(--mark); padding: 3px 8px; border: 1px dashed var(--mark); border-radius: 6px; max-width: 34ch; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.badge.start { background: color-mix(in srgb, var(--evt) 22%, transparent); color: var(--evt); }
.badge.stop  { background: color-mix(in srgb, var(--mark) 22%, transparent); color: var(--mark); }

dialog { background: var(--panel); color: var(--fg); border: 1px solid var(--line); border-radius: 10px; padding: 18px 20px; width: min(440px, 92vw); }
dialog::backdrop { background: rgba(0,0,0,.5); }
dialog h3 { margin: 0 0 6px; }
dialog input { width: 100%; margin-top: 8px; }
dialog menu { display: flex; justify-content: flex-end; gap: 8px; padding: 0; margin: 14px 0 0; }

@media (max-width: 800px) {
  .layout { grid-template-columns: 1fr; grid-template-rows: auto 1fr; }
  .side { border-right: 0; border-bottom: 1px solid var(--line); max-height: 32vh; }
  .c-asc, .c-te { display: none; }
}
@media (prefers-reduced-motion: no-preference) {
  tr.flash td { animation: flash .6s ease-out; }
  @keyframes flash { from { background: color-mix(in srgb, var(--accent) 25%, transparent); } to { background: transparent; } }
}