:root {
  --bg: #0e1116;
  --card: #161b23;
  --card2: #1c2230;
  --fg: #e6edf3;
  --muted: #8b98a9;
  --accent: #4f8cff;
  --ok: #3fb950;
  --warn: #d29922;
  --err: #f85149;
  --border: #2a3340;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font: 14px/1.5 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
}

.hidden { display: none !important; }
.muted { color: var(--muted); }
.error { color: var(--err); min-height: 1.2em; margin-top: 8px; }

.topbar {
  display: flex; align-items: center; gap: 24px;
  padding: 12px 24px;
  border-bottom: 1px solid var(--border);
  background: var(--card);
  position: sticky; top: 0; z-index: 10;
}

.brand { font-weight: 700; font-size: 18px; letter-spacing: .5px; }

.tabs { display: flex; gap: 6px; flex: 1; }
.tabs button, #logout {
  background: transparent; color: var(--muted);
  border: 1px solid transparent; border-radius: 8px;
  padding: 7px 14px; cursor: pointer; font-size: 14px;
}
.tabs button:hover { color: var(--fg); background: var(--card2); }
.tabs button.active { color: var(--fg); background: var(--card2); border-color: var(--border); }
.ghost { border: 1px solid var(--border); background: transparent; color: var(--muted); border-radius: 8px; padding: 7px 14px; cursor: pointer; }

main { padding: 24px; max-width: 1400px; margin: 0 auto; }

.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 18px;
  margin-bottom: 18px;
}
.card h2 { margin: 0 0 14px; font-size: 15px; font-weight: 600; color: var(--muted); text-transform: uppercase; letter-spacing: .6px; }

.login { min-height: 100vh; display: grid; place-items: center; padding: 24px; }
.login-card { width: 100%; max-width: 360px; display: flex; flex-direction: column; gap: 12px; }
.login-card h1 { margin: 0; font-size: 26px; }
.login-card input, .login-card button { padding: 11px 12px; border-radius: 8px; border: 1px solid var(--border); font-size: 14px; }
.login-card input { background: var(--card2); color: var(--fg); }
.login-card button { background: var(--accent); color: #fff; border: 0; cursor: pointer; font-weight: 600; }

.stats { display: grid; grid-template-columns: repeat(auto-fit, minmax(150px, 1fr)); gap: 12px; margin-bottom: 18px; }
.stat { background: var(--card); border: 1px solid var(--border); border-radius: 12px; padding: 16px; }
.stat .num { font-size: 26px; font-weight: 700; }
.stat .lbl { color: var(--muted); font-size: 12px; text-transform: uppercase; letter-spacing: .5px; }

table { width: 100%; border-collapse: collapse; }
th, td { text-align: left; padding: 9px 10px; border-bottom: 1px solid var(--border); vertical-align: top; }
th { color: var(--muted); font-weight: 500; font-size: 12px; text-transform: uppercase; letter-spacing: .5px; }
tr:last-child td { border-bottom: 0; }
tbody tr:hover { background: var(--card2); cursor: default; }

.badge { display: inline-block; padding: 2px 8px; border-radius: 999px; font-size: 12px; border: 1px solid var(--border); }
.badge.ok { color: var(--ok); border-color: rgba(63,185,80,.4); }
.badge.off { color: var(--muted); }

.split { display: grid; grid-template-columns: 380px 1fr; gap: 18px; align-items: start; }
.side { max-height: 72vh; overflow: auto; }
.main-pane { min-height: 72vh; display: flex; flex-direction: column; }
.chat-item { padding: 10px; border-radius: 8px; cursor: pointer; border: 1px solid transparent; }
.chat-item:hover { background: var(--card2); }
.chat-item.active { background: var(--card2); border-color: var(--border); }
.chat-item .t { font-weight: 600; }
.chat-item .s { color: var(--muted); font-size: 12px; }

.messages { display: flex; flex-direction: column; gap: 8px; overflow: auto; padding-top: 6px; }
.msg { max-width: 74%; padding: 9px 12px; border-radius: 10px; background: var(--card2); border: 1px solid var(--border); }
.msg.out { align-self: flex-end; background: rgba(79,140,255,.12); border-color: rgba(79,140,255,.35); }
.msg .meta { font-size: 11px; color: var(--muted); margin-bottom: 3px; }
.msg .txt { white-space: pre-wrap; word-break: break-word; }

@media (max-width: 900px) {
  .split { grid-template-columns: 1fr; }
  .topbar { flex-wrap: wrap; gap: 10px; }
}