:root {
  --bg: #f4f6fb;
  --panel: #fff;
  --ink: #182033;
  --muted: #5b677d;
  --line: #d8deea;
  --accent: #2f6fed;
  --ok: #1b7f4a;
  --warn: #9a6b00;
  --err: #b42318;
  --ok-bg: #e8f7ee;
  --warn-bg: #fff6df;
  --err-bg: #fdecea;
}
* { box-sizing: border-box; }
body {
  margin: 0;
  font: 15px/1.45 system-ui, sans-serif;
  color: var(--ink);
  background: linear-gradient(180deg, #e9eef8, var(--bg) 240px);
  padding: 1rem clamp(.8rem, 2vw, 1.5rem) 3rem;
}
h1,h2 { margin: 0 0 .35rem; }
.sub { margin: 0; color: var(--muted); font-size: .92rem; }
a { color: var(--accent); }
.top, .diag-head, .row {
  display: flex;
  gap: .6rem;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
}
.top { margin-bottom: 1rem; }
.panel {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 1rem;
  margin-bottom: .9rem;
  box-shadow: 0 8px 24px rgba(24,32,51,.04);
}
.grid-2, .grid-3 {
  display: grid;
  gap: .65rem;
  margin: .6rem 0 .8rem;
}
.grid-2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.grid-3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
@media (max-width: 900px) {
  .grid-2, .grid-3, .clients { grid-template-columns: 1fr !important; }
}
label { display: flex; flex-direction: column; gap: .25rem; font-size: .82rem; color: var(--muted); font-weight: 600; }
input, select {
  font: inherit;
  color: var(--ink);
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: .5rem .65rem;
  background: #fff;
}
.inline { flex-direction: row; align-items: center; gap: .4rem; font-weight: 500; }
.checks { gap: .45rem; }
.btn {
  border: 1px solid var(--line);
  background: #f7f9fd;
  color: var(--ink);
  border-radius: 10px;
  padding: .45rem .75rem;
  font: inherit;
  font-weight: 650;
  cursor: pointer;
}
.btn:disabled { opacity: .45; cursor: not-allowed; }
.btn-primary { background: var(--accent); border-color: var(--accent); color: #fff; }
.clients {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: .9rem;
}
.wrap { justify-content: flex-start; }
.feed {
  margin-top: .75rem;
  border: 1px solid var(--line);
  border-radius: 12px;
  min-height: 220px;
  max-height: 340px;
  overflow: auto;
  padding: .55rem;
  background: #fafbfe;
}
.feed .line {
  padding: .28rem .4rem;
  border-radius: 8px;
  margin-bottom: .25rem;
  font-size: .86rem;
  word-break: break-word;
}
.feed .line.sys { color: var(--muted); }
.feed .line.err { background: var(--err-bg); color: var(--err); }
.feed .line.warn { background: var(--warn-bg); color: var(--warn); }
.feed .line.ok { background: var(--ok-bg); color: var(--ok); }
.feed .line.chat { background: #eef3ff; }
.feed .line.dm { background: #f3eefc; }
.feed .line.file { background: #eaf8f1; }
.badge {
  display: inline-flex;
  align-items: center;
  border-radius: 999px;
  padding: .18rem .55rem;
  font-size: .75rem;
  font-weight: 750;
}
.badge-off { background: #eceff5; color: var(--muted); }
.badge-on { background: var(--ok-bg); color: var(--ok); }
.badge-ok { background: var(--ok-bg); color: var(--ok); }
.badge-warn { background: var(--warn-bg); color: var(--warn); }
.badge-error, .badge-err { background: var(--err-bg); color: var(--err); }
.badge-unknown { background: #eceff5; color: var(--muted); }
.meta { color: var(--muted); font-size: .88rem; }
.issues { list-style: none; padding: 0; margin: .6rem 0 0; }
.issues li {
  padding: .55rem .7rem;
  border-radius: 10px;
  margin-bottom: .35rem;
  font-size: .9rem;
}
.issues li.error { background: var(--err-bg); color: var(--err); }
.issues li.warn { background: var(--warn-bg); color: var(--warn); }
.issues li.info { background: #eef3ff; color: #274690; }
.codeblock {
  background: #0f1728;
  color: #d7e0f2;
  border-radius: 12px;
  padding: .8rem;
  overflow: auto;
  font-size: .78rem;
  line-height: 1.4;
  max-height: 280px;
}
.log-view { max-height: 360px; white-space: pre-wrap; }
.linkish {
  border: 0;
  background: none;
  color: var(--accent);
  cursor: pointer;
  padding: 0;
  font: inherit;
}
.progress-wrap { margin-top: .55rem; }
.progress-track {
  height: 4px;
  border-radius: 999px;
  background: rgba(47,111,237,.15);
  overflow: hidden;
}
.progress-bar {
  height: 100%;
  width: 0%;
  background: #7ec8f0;
  transition: width .15s ease-out;
}

.selftest-panel .st-h3 { margin: 1rem 0 .4rem; font-size: 1rem; }
.selftest-report { max-height: 480px; white-space: pre-wrap; font-size: .8rem; }
.st-details { margin-top: .6rem; }
.st-details summary { cursor: pointer; color: var(--accent); font-weight: 650; }

.feature-chips {
  display: flex;
  flex-wrap: wrap;
  gap: .35rem;
  margin: .55rem 0 .35rem;
}
.chip {
  display: inline-flex;
  align-items: center;
  border-radius: 999px;
  padding: .15rem .5rem;
  font-size: .72rem;
  font-weight: 700;
  border: 1px solid var(--line);
  background: #f7f9fd;
  color: var(--muted);
}
.chip-on { background: var(--ok-bg); color: var(--ok); border-color: #b7e4c7; }
.chip-off { background: #eceff5; color: var(--muted); text-decoration: line-through; opacity: .85; }
.diag-limits {
  margin: .25rem 0 .5rem;
  padding: .45rem .6rem;
  border-radius: 10px;
  background: #f0f4fb;
  font-size: .82rem;
}
.online-row {
  margin-top: .35rem;
  padding-top: .35rem;
  border-top: 1px dashed var(--line);
}
.peer-label { font-weight: 650; }
.feed .line.online { background: #e8f4ff; }