:root {
  --bg: #0f1419;
  --fg: #e6edf3;
  --muted: #8b949e;
  --ok: #2ea043;
  --warn: #d29922;
  --alert: #f85149;
  --primary: #1f6feb;
  --replica: #6e40c9;
  --card: #161b22;
  --border: #30363d;
}

* { box-sizing: border-box; }

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", system-ui, sans-serif;
  background: var(--bg);
  color: var(--fg);
  margin: 0;
  padding: 1.25rem;
  max-width: 720px;
  margin-inline: auto;
  line-height: 1.45;
}

h1 { font-size: 1.4rem; margin: 0 0 0.25rem; }
h2 { font-size: 1.1rem; margin: 0 0 0.4rem; }
h2 small { color: var(--muted); font-weight: 400; text-transform: uppercase; font-size: 0.7rem; letter-spacing: 0.05em; }

.asof { color: var(--muted); font-size: 0.85rem; margin-top: 0; }

.host {
  background: var(--card);
  border: 1px solid var(--border);
  border-left-width: 4px;
  border-radius: 8px;
  padding: 0.9rem 1rem;
  margin-bottom: 0.75rem;
}
.host.primary { border-left-color: var(--primary); }
.host.replica { border-left-color: var(--replica); }
.host.unknown { border-left-color: var(--warn); }
/* Stale snapshot → host presumed down. Dimmed + red so it can't be mistaken
   for a live, serving node (a powered-off ex-primary must not read as PRIMARY). */
.host.unreachable { border-left-color: var(--alert); opacity: 0.65; }

.repl, .meta { font-size: 0.85rem; color: var(--muted); }
.meta { margin-top: 0.2rem; }
.preflight { margin-top: 0.5rem; font-weight: 600; }
.dns { margin-top: 0.3rem; font-size: 0.8rem; color: var(--muted); }
.dns.warn { color: var(--warn); }
.steer { margin-top: 0.4rem; font-size: 0.85rem; font-weight: 600; }
.steer.alert { color: var(--alert); }

.diagnose-btn {
  margin-top: 0.6rem;
  background: transparent;
  color: var(--muted);
  border: 1px solid var(--border);
  padding: 0.3rem 0.7rem;
  font-size: 0.8rem;
}
.diagnose-btn:hover { color: var(--fg); border-color: var(--fg); }

.diag {
  margin-top: 0.6rem;
  border-top: 1px solid var(--border);
  padding-top: 0.5rem;
  font-size: 0.82rem;
}
.diag-interp { font-weight: 600; margin-bottom: 0.4rem; }
.diag-row { color: var(--muted); margin-top: 0.15rem; }
.diag-row.ok { color: var(--ok); }
.diag-row.warn { color: var(--warn); }
.diag-remedy { color: var(--fg); margin: 0.1rem 0 0.3rem 1.2rem; font-size: 0.8rem; }
.diag-remedy code { white-space: pre-wrap; }

.ok { color: var(--ok); }
.warn { color: var(--warn); }
.muted { color: var(--muted); font-weight: 400; }

.rpo { margin: 1rem 0; font-size: 0.9rem; color: var(--fg); }

.failover-link, button {
  display: inline-block;
  background: var(--primary);
  color: #fff;
  text-decoration: none;
  padding: 0.6rem 1.1rem;
  border-radius: 6px;
  border: none;
  font-size: 1rem;
  cursor: pointer;
}
.failover-page .warning { color: var(--warn); border: 1px solid var(--warn); padding: 0.6rem 0.8rem; border-radius: 6px; }
button:disabled { opacity: 0.4; cursor: not-allowed; }

#confirm {
  font-size: 1.1rem;
  padding: 0.5rem 0.7rem;
  letter-spacing: 0.1em;
  background: var(--card);
  color: var(--fg);
  border: 1px solid var(--border);
  border-radius: 6px;
  margin-right: 0.5rem;
}

#log {
  background: #010409;
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 0.75rem;
  max-height: 50vh;
  overflow-y: auto;
  white-space: pre-wrap;
  font-size: 0.8rem;
  margin-top: 1rem;
}

code { background: var(--card); padding: 0.1rem 0.3rem; border-radius: 4px; }