:root {
  --bg: #f4f5f7;
  --card: #ffffff;
  --text: #1c1e21;
  --muted: #61656b;
  --border: #d9dce1;
  --accent: #1f6feb;
  --accent-text: #ffffff;
  --good: #1a7f37;
  --bad: #c62828;
  --warn-bg: #fff4ce;
  --scope-bg: #0f1419;
  --mono: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  color-scheme: light;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0f1115;
    --card: #181b21;
    --text: #e6e8eb;
    --muted: #9aa0a8;
    --border: #2d323a;
    --accent: #4c8dff;
    --good: #3fb950;
    --bad: #f47067;
    --warn-bg: #3b3220;
    --scope-bg: #0a0d11;
    color-scheme: dark;
  }
}

* { box-sizing: border-box; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 16px/1.45 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
}
.top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  flex-wrap: wrap;
  padding: 12px 16px;
  background: var(--card);
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 2;
}
h1 { font-size: 20px; margin: 0; }
h2 { font-size: 16px; margin: 0 0 10px; display: flex; align-items: center; gap: 8px; }
main { max-width: 760px; margin: 0 auto; padding: 12px 16px 24px; }
footer { max-width: 760px; margin: 0 auto; padding: 0 16px 24px; }
.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 14px 16px;
  margin-bottom: 12px;
}
.muted { color: var(--muted); margin: 6px 0 0; }
.small { font-size: 13px; }
.warn { background: var(--warn-bg); padding: 8px 10px; border-radius: 8px; margin: 0 0 10px; }
.row { display: flex; gap: 10px; align-items: flex-end; margin-top: 8px; }
.row.wrap { flex-wrap: wrap; }
.grow { flex: 1; min-width: 0; }
label { display: flex; flex-direction: column; gap: 4px; font-size: 14px; color: var(--muted); }
label.check { flex-direction: row; align-items: flex-start; gap: 8px; margin-top: 10px; color: var(--text); }
label.check input { margin-top: 3px; }

button, select, input, textarea {
  font: inherit;
  color: var(--text);
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 8px 12px;
}
input[type="range"] { padding: 0; border: 0; background: transparent; accent-color: var(--accent); }
input[type="radio"], input[type="checkbox"] { accent-color: var(--accent); }
textarea { width: 100%; resize: vertical; font-family: var(--mono); }
select { width: 100%; }
.num { width: 6.5em; }
button { cursor: pointer; white-space: nowrap; }
button:disabled { opacity: 0.5; cursor: default; }
button.primary { background: var(--accent); color: var(--accent-text); border-color: var(--accent); }
.big-btn { padding: 11px 20px; font-weight: 600; }
.small-btn { padding: 2px 10px; font-size: 13px; font-weight: 400; margin-left: auto; }
.actions { margin-top: 14px; }
.big { font-size: 22px; font-weight: 700; min-width: 2.5ch; text-align: right; }

.roles, .tabs { display: flex; gap: 4px; background: var(--bg); padding: 3px; border-radius: 10px; }
.roles button, .tabs button { border: 0; background: transparent; padding: 6px 14px; }
.roles button[aria-selected="true"], .tabs button[aria-selected="true"] {
  background: var(--card);
  box-shadow: 0 1px 2px rgba(0, 0, 0, 0.15);
  font-weight: 600;
}
.tabs { margin-bottom: 10px; display: inline-flex; }
.seg { display: flex; gap: 16px; flex-wrap: wrap; margin-bottom: 4px; }
.seg label { flex-direction: row; gap: 6px; align-items: center; color: var(--text); font-size: 15px; }

.drop {
  border: 2px dashed var(--border);
  border-radius: 10px;
  padding: 22px 12px;
  text-align: center;
  cursor: pointer;
  color: var(--muted);
  align-items: center;
}
.drop.over { border-color: var(--accent); color: var(--text); }
.info { margin-top: 10px; font-size: 14px; }
.info b { font-weight: 600; }
.info .warn { margin-top: 6px; }
details { margin-top: 12px; }
summary { cursor: pointer; color: var(--muted); }

progress { width: 100%; height: 10px; margin-top: 12px; accent-color: var(--accent); }
.ticker {
  font-family: var(--mono);
  margin-top: 6px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: clip;
  color: var(--muted);
}
.ticker .cur { background: var(--accent); color: var(--accent-text); border-radius: 3px; padding: 0 2px; }
.ticker .done { color: var(--text); }
.log {
  font-family: var(--mono);
  font-size: 13px;
  max-height: 180px;
  overflow: auto;
  margin: 0;
  white-space: pre-wrap;
  word-break: break-word;
}

#rx-scope { width: 100%; height: 140px; background: var(--scope-bg); border-radius: 8px; display: block; }
.led {
  width: 14px; height: 14px; border-radius: 50%;
  background: var(--border);
  display: inline-block;
  transition: background 0.05s;
}
.led.on { background: var(--good); box-shadow: 0 0 8px var(--good); }

.stream {
  font-family: var(--mono);
  font-size: 14px;
  word-break: break-all;
  max-height: 220px;
  overflow: auto;
  line-height: 1.6;
}
.stream .pkt { color: var(--good); }
.stream .bad { color: var(--bad); }
.stream .word { color: var(--text); }
.stream .live { color: var(--accent); }
.rx-text { font-family: var(--mono); white-space: pre-wrap; word-break: break-word; min-height: 1.5em; }
.rx-text .msg { display: block; border-left: 3px solid var(--good); padding-left: 8px; margin: 6px 0; font-family: inherit; }

.xfer { border: 1px solid var(--border); border-radius: 10px; padding: 10px 12px; margin-top: 8px; }
.xfer-head { display: flex; justify-content: space-between; gap: 8px; flex-wrap: wrap; }
.xfer-name { font-weight: 600; word-break: break-all; }
.grid { display: flex; flex-wrap: wrap; gap: 3px; margin: 8px 0; }
.grid i { width: 12px; height: 12px; border-radius: 2px; background: var(--border); }
.grid i.ok { background: var(--good); }
.missing { font-size: 14px; }
.missing code { font-family: var(--mono); }
.ok-text { color: var(--good); font-weight: 600; }
.err-text { color: var(--bad); font-weight: 600; }
.preview { margin-top: 8px; max-width: 100%; }
.preview img, .preview video { max-width: 100%; border-radius: 8px; }
.preview pre { white-space: pre-wrap; word-break: break-word; max-height: 240px; overflow: auto; font-family: var(--mono); font-size: 13px; }
code { font-family: var(--mono); }

@media (max-width: 520px) {
  .row { flex-wrap: wrap; }
  .row > button { flex: 1; }
  .top { padding: 10px 16px; }
}