:root {
  --bg:       #0d1117;
  --surface:  #161b22;
  --border:   #30363d;
  --accent:   #58a6ff;
  --success:  #3fb950;
  --danger:   #f85149;
  --warning:  #d29922;
  --text:     #e6edf3;
  --muted:    #8b949e;
  --mono:     'Cascadia Code', 'Fira Code', monospace;
}

* { box-sizing: border-box; margin: 0; padding: 0; }

body {
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  font-size: 14px;
  height: 100vh;
  overflow: hidden;
}

.layout {
  display: flex;
  height: 100vh;
}

/* ── Sidebar ─────────────────────────────────────────────── */
.sidebar {
  width: 300px;
  min-width: 260px;
  background: var(--surface);
  border-right: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

.sidebar-header {
  padding: 16px;
  border-bottom: 1px solid var(--border);
}

.sidebar-header h2 { font-size: 15px; font-weight: 600; margin-bottom: 8px; }

.status-row { display: flex; align-items: center; gap: 8px; }

.dot {
  width: 8px; height: 8px;
  border-radius: 50%;
  background: var(--muted);
  transition: background 0.3s;
}
.dot.ok  { background: var(--success); }
.dot.err { background: var(--danger); }

.last-ts { font-size: 11px; color: var(--muted); margin-left: auto; }

.tab-nav {
  display: flex;
  border-bottom: 1px solid var(--border);
}

.tab-btn {
  flex: 1;
  padding: 8px 4px;
  background: none;
  border: none;
  color: var(--muted);
  cursor: pointer;
  font-size: 12px;
  border-bottom: 2px solid transparent;
  transition: color 0.2s, border-color 0.2s;
}
.tab-btn:hover   { color: var(--text); }
.tab-btn.active  { color: var(--accent); border-bottom-color: var(--accent); }

.tab-panel { display: none; flex: 1; overflow-y: auto; }
.tab-panel.active { display: block; }

.item-list { padding: 8px; }

.item {
  padding: 8px 10px;
  border-radius: 6px;
  margin-bottom: 6px;
  background: var(--bg);
  border: 1px solid var(--border);
  font-size: 12px;
  cursor: pointer;
  transition: border-color 0.2s;
}
.item:hover { border-color: var(--accent); }
.item .item-q { color: var(--text); margin-bottom: 3px; }
.item .item-meta { color: var(--muted); font-size: 11px; }
.item .badge {
  display: inline-block;
  padding: 1px 6px;
  border-radius: 10px;
  font-size: 10px;
  font-weight: 600;
  margin-right: 4px;
}
.badge.kpi  { background: #1f3a5f; color: var(--accent); }
.badge.rag  { background: #1f3a2f; color: var(--success); }
.badge.both { background: #3a2f1f; color: var(--warning); }

/* ── Chat ────────────────────────────────────────────────── */
.chat-area {
  flex: 1;
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

.messages {
  flex: 1;
  overflow-y: auto;
  padding: 20px;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.msg {
  max-width: 820px;
  width: 100%;
}

.msg.user { align-self: flex-end; }
.msg.assistant { align-self: flex-start; }

.msg-bubble {
  padding: 12px 16px;
  border-radius: 10px;
  line-height: 1.6;
  white-space: pre-wrap;
  word-break: break-word;
}

.msg.user .msg-bubble {
  background: #1c3a5f;
  border: 1px solid #2d5a8e;
}

.msg.assistant .msg-bubble {
  background: var(--surface);
  border: 1px solid var(--border);
}

.msg-meta {
  font-size: 11px;
  color: var(--muted);
  margin-top: 4px;
  padding: 0 4px;
}

.agent-tag {
  display: inline-block;
  padding: 1px 7px;
  border-radius: 10px;
  font-size: 10px;
  font-weight: 700;
  margin-right: 6px;
}
.agent-tag.kpi  { background: #1f3a5f; color: var(--accent); }
.agent-tag.rag  { background: #1f3a2f; color: var(--success); }
.agent-tag.both { background: #3a2f1f; color: var(--warning); }

.typing { display: flex; gap: 4px; align-items: center; padding: 4px 0; }
.typing span {
  width: 6px; height: 6px;
  background: var(--muted);
  border-radius: 50%;
  animation: bounce 1.1s infinite;
}
.typing span:nth-child(2) { animation-delay: 0.15s; }
.typing span:nth-child(3) { animation-delay: 0.30s; }
@keyframes bounce {
  0%, 80%, 100% { transform: translateY(0); }
  40%           { transform: translateY(-6px); }
}

/* code blocks */
.msg-bubble pre {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 12px;
  margin: 8px 0;
  overflow-x: auto;
  font-family: var(--mono);
  font-size: 12px;
}
.msg-bubble code { font-family: var(--mono); font-size: 12px; }
.msg-bubble table {
  border-collapse: collapse;
  margin: 8px 0;
  font-size: 12px;
}
.msg-bubble th, .msg-bubble td {
  border: 1px solid var(--border);
  padding: 5px 10px;
  text-align: left;
}
.msg-bubble th { background: var(--bg); }

/* ── Input ───────────────────────────────────────────────── */
.input-row {
  display: flex;
  gap: 10px;
  padding: 14px 20px;
  border-top: 1px solid var(--border);
  background: var(--surface);
}

textarea {
  flex: 1;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 8px;
  color: var(--text);
  font-family: inherit;
  font-size: 14px;
  padding: 10px 14px;
  resize: none;
  outline: none;
  max-height: 160px;
  transition: border-color 0.2s;
}
textarea:focus { border-color: var(--accent); }

#send-btn {
  padding: 10px 22px;
  background: var(--accent);
  color: #0d1117;
  border: none;
  border-radius: 8px;
  font-weight: 600;
  cursor: pointer;
  font-size: 14px;
  transition: opacity 0.2s;
}
#send-btn:disabled { opacity: 0.4; cursor: default; }

/* ── Login screen ────────────────────────────────────────── */
.login-screen {
  position: fixed; inset: 0;
  background: var(--bg);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 100;
}

.login-box {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 40px 36px;
  width: 340px;
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.login-box h1 {
  font-size: 22px;
  font-weight: 700;
  color: var(--text);
  text-align: center;
}

.login-sub {
  font-size: 13px;
  color: var(--muted);
  text-align: center;
  margin-top: -8px;
}

.login-box input {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 8px;
  color: var(--text);
  font-family: inherit;
  font-size: 14px;
  padding: 10px 14px;
  outline: none;
  transition: border-color 0.2s;
}
.login-box input:focus { border-color: var(--accent); }

.login-box button {
  padding: 11px;
  background: var(--accent);
  color: #0d1117;
  border: none;
  border-radius: 8px;
  font-weight: 600;
  font-size: 14px;
  cursor: pointer;
  transition: opacity 0.2s;
  margin-top: 4px;
}
.login-box button:disabled { opacity: 0.5; cursor: default; }

.login-error {
  background: #2d1a1a;
  border: 1px solid var(--danger);
  border-radius: 6px;
  color: var(--danger);
  font-size: 13px;
  padding: 8px 12px;
}

/* ── Sidebar user / logout ───────────────────────────────── */
.sidebar-title-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 8px;
}

.logout-btn {
  background: none;
  border: none;
  color: var(--muted);
  cursor: pointer;
  font-size: 16px;
  padding: 2px 4px;
  border-radius: 4px;
  transition: color 0.2s;
}
.logout-btn:hover { color: var(--danger); }

.user-badge {
  font-size: 11px;
  color: var(--muted);
  margin-left: auto;
}