:root {
  --bg: #f6f7f9;
  --panel: #ffffff;
  --side: #0f1b2d;
  --side-text: #c9d3e0;
  --side-muted: #7f8ea3;
  --side-hover: #1b2a40;
  --text: #1c2430;
  --muted: #6b7686;
  --border: #e3e7ed;
  --accent: #1f6feb;
  --accent-soft: #e8f0fe;
  --user-bg: #1f6feb;
  --user-text: #ffffff;
  --ok: #1a7f37;
  --warn: #9a6700;
  --err: #cf222e;
  --code-bg: #f3f5f8;
  --shadow: 0 1px 2px rgba(16, 24, 40, .06), 0 1px 3px rgba(16, 24, 40, .08);
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0d1117;
    --panel: #161b22;
    --side: #0a0f16;
    --side-hover: #151d29;
    --text: #e6edf3;
    --muted: #8b949e;
    --border: #2a313c;
    --accent: #4493f8;
    --accent-soft: #15243a;
    --user-bg: #1f6feb;
    --code-bg: #0f141b;
    --ok: #3fb950;
    --warn: #d29922;
    --err: #f85149;
    --shadow: none;
  }
}
* { box-sizing: border-box; }
html, body { height: 100%; margin: 0; }
body {
  font-family: "Segoe UI", system-ui, -apple-system, Roboto, "Helvetica Neue", Arial, sans-serif;
  background: var(--bg); color: var(--text); font-size: 15px; line-height: 1.55;
}
.app { display: flex; height: 100vh; overflow: hidden; }

/* ---------- Sidebar ---------- */
.sidebar {
  width: 272px; flex-shrink: 0; background: var(--side); color: var(--side-text);
  display: flex; flex-direction: column; padding: 16px 12px; gap: 10px;
}
.brand { display: flex; align-items: center; gap: 10px; padding: 4px 6px 10px; }
.logo { font-size: 22px; color: #58a6ff; }
.brand-name { font-weight: 700; font-size: 17px; color: #fff; }
.brand-sub { font-size: 12px; color: var(--side-muted); }
.btn-new {
  background: #1f6feb; color: #fff; border: 0; border-radius: 8px; padding: 10px 12px;
  font-size: 14px; font-weight: 600; cursor: pointer; text-align: left;
}
.btn-new:hover { background: #2f7bf5; }
.side-label { font-size: 11px; text-transform: uppercase; letter-spacing: .06em; color: var(--side-muted); padding: 6px 6px 2px; display: block; }
.conv-list { list-style: none; margin: 0; padding: 0; overflow-y: auto; flex: 1; }
.conv-item {
  display: flex; align-items: center; gap: 6px; padding: 8px 10px; border-radius: 7px; cursor: pointer;
  font-size: 13.5px; color: var(--side-text);
}
.conv-item:hover { background: var(--side-hover); }
.conv-item.active { background: var(--side-hover); color: #fff; }
.conv-item .t { flex: 1; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.conv-item .ds { font-size: 10.5px; color: var(--side-muted); }
.conv-item .del { visibility: hidden; background: none; border: 0; color: var(--side-muted); cursor: pointer; font-size: 14px; }
.conv-item:hover .del { visibility: visible; }
.side-foot { border-top: 1px solid #22314a; padding-top: 10px; }
.ds-select {
  width: 100%; background: #16243a; color: #fff; border: 1px solid #2a3c58; border-radius: 7px;
  padding: 8px; font-size: 13.5px;
}
.ds-desc { font-size: 12px; color: var(--side-muted); padding: 6px 2px 0; }

/* ---------- Main ---------- */
.main { flex: 1; display: flex; flex-direction: column; min-width: 0; }
.topbar {
  display: flex; align-items: center; gap: 12px; padding: 12px 20px; border-bottom: 1px solid var(--border);
  background: var(--panel);
}
.topbar-title { flex: 1; font-weight: 600; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.toggle { display: flex; align-items: center; gap: 6px; font-size: 13px; color: var(--muted); cursor: pointer; user-select: none; }
.icon-btn { background: none; border: 0; font-size: 20px; color: var(--text); cursor: pointer; }
.only-mobile { display: none; }

.messages { flex: 1; overflow-y: auto; padding: 24px 16px 8px; }
.messages > * { max-width: 920px; margin-left: auto; margin-right: auto; }
.empty { text-align: center; padding-top: 10vh; color: var(--muted); }
.empty h1 { color: var(--text); font-size: 26px; margin: 0 0 6px; }
.examples { display: flex; flex-wrap: wrap; gap: 8px; justify-content: center; margin-top: 22px; }
.chip {
  background: var(--panel); border: 1px solid var(--border); border-radius: 999px; padding: 8px 14px;
  font-size: 13.5px; color: var(--text); cursor: pointer; box-shadow: var(--shadow);
}
.chip:hover { border-color: var(--accent); color: var(--accent); }
.suggest { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 10px; }
.suggest .chip { padding: 6px 12px; font-size: 13px; box-shadow: none; }

.msg { display: flex; margin: 14px auto; }
.msg.user { justify-content: flex-end; }
.bubble { max-width: 80%; border-radius: 14px; padding: 10px 14px; word-wrap: break-word; }
.msg.user .bubble { background: var(--user-bg); color: var(--user-text); border-bottom-right-radius: 4px; white-space: pre-wrap; }
.msg.bot .bubble {
  background: var(--panel); border: 1px solid var(--border); box-shadow: var(--shadow);
  border-bottom-left-radius: 4px; max-width: 100%; width: 100%;
}
.answer p { margin: 0 0 8px; }
.answer p:last-child { margin-bottom: 0; }
.answer ul, .answer ol { margin: 4px 0 8px; padding-left: 22px; }
.answer code { background: var(--code-bg); padding: 1px 5px; border-radius: 4px; font-size: 13px; }
.answer pre, .trace pre {
  background: var(--code-bg); border: 1px solid var(--border); border-radius: 8px; padding: 10px;
  overflow-x: auto; font-size: 12.5px; line-height: 1.45; margin: 6px 0; white-space: pre-wrap;
}
.answer h1, .answer h2, .answer h3 { font-size: 15.5px; margin: 10px 0 6px; }
.tbl-wrap { overflow-x: auto; margin: 6px 0 10px; }
table { border-collapse: collapse; font-size: 13px; min-width: 50%; }
th, td { border: 1px solid var(--border); padding: 5px 9px; text-align: left; vertical-align: top; }
th { background: var(--code-bg); font-weight: 600; }
td.num { text-align: right; font-variant-numeric: tabular-nums; }

.meta { display: flex; flex-wrap: wrap; align-items: center; gap: 8px; margin-top: 10px; font-size: 12px; color: var(--muted); }
.badge { border-radius: 999px; padding: 1px 9px; font-weight: 600; font-size: 11.5px; border: 1px solid currentColor; }
.badge.answered { color: var(--ok); }
.badge.clarify, .badge.no_data, .badge.unsupported { color: var(--warn); }
.badge.error { color: var(--err); }
.fb { margin-left: auto; display: flex; gap: 4px; }
.fb button {
  background: none; border: 1px solid var(--border); border-radius: 6px; padding: 2px 8px; cursor: pointer;
  color: var(--muted); font-size: 13px;
}
.fb button.on { border-color: var(--accent); color: var(--accent); background: var(--accent-soft); }
.fb-note { display: flex; gap: 6px; margin-top: 8px; }
.fb-note input { flex: 1; border: 1px solid var(--border); border-radius: 6px; padding: 6px 8px; background: var(--bg); color: var(--text); }
.fb-note button { border: 0; border-radius: 6px; background: var(--accent); color: #fff; padding: 6px 12px; cursor: pointer; }
.fb-saved { color: var(--ok); font-size: 12px; }

.progress { font-size: 13px; color: var(--muted); display: flex; flex-direction: column; gap: 3px; margin-bottom: 6px; }
.progress .step::before { content: "• "; color: var(--accent); }
.progress .step.live::after { content: " …"; animation: blink 1s infinite; }
@keyframes blink { 50% { opacity: .2; } }
.cursor::after { content: "▍"; animation: blink 1s infinite; color: var(--accent); }

.trace { margin-top: 10px; border-top: 1px dashed var(--border); padding-top: 8px; font-size: 13px; }
.trace summary { cursor: pointer; color: var(--accent); font-weight: 600; user-select: none; }
.trace h4 { margin: 12px 0 4px; font-size: 12px; text-transform: uppercase; letter-spacing: .05em; color: var(--muted); }
.trace .kv { display: grid; grid-template-columns: max-content 1fr; gap: 2px 12px; }
.trace .kv div:nth-child(odd) { color: var(--muted); }
.cand { border: 1px solid var(--border); border-radius: 8px; padding: 8px 10px; margin: 6px 0; }
.cand.chosen { border-color: var(--ok); }
.cand-head { display: flex; flex-wrap: wrap; gap: 8px; align-items: center; font-weight: 600; }
.pill { font-size: 11px; border-radius: 4px; padding: 0 6px; background: var(--code-bg); font-weight: 500; }
.pill.ok { color: var(--ok); } .pill.err { color: var(--err); } .pill.warn { color: var(--warn); }
.hide-trace .trace, .hide-trace .progress { display: none; }

.composer {
  display: flex; gap: 8px; padding: 12px 16px 16px; max-width: 952px; width: 100%; margin: 0 auto;
}
.composer textarea {
  flex: 1; resize: none; border: 1px solid var(--border); border-radius: 12px; padding: 12px 14px;
  font: inherit; background: var(--panel); color: var(--text); max-height: 180px; box-shadow: var(--shadow);
}
.composer textarea:focus { outline: 2px solid var(--accent-soft); border-color: var(--accent); }
.btn-send, .btn-stop { border: 0; border-radius: 12px; padding: 0 20px; font-weight: 600; cursor: pointer; font-size: 14px; }
.btn-send { background: var(--accent); color: #fff; }
.btn-send:disabled { opacity: .5; cursor: not-allowed; }
.btn-stop { background: var(--err); color: #fff; }

@media (max-width: 760px) {
  .sidebar { position: fixed; inset: 0 auto 0 0; z-index: 20; transform: translateX(-100%); transition: transform .2s; }
  .sidebar.open { transform: none; box-shadow: 0 0 0 100vmax rgba(0, 0, 0, .4); }
  .only-mobile { display: inline-block; }
  .toggle span { display: none; }
  .bubble { max-width: 92%; }
  .messages { padding: 16px 12px 8px; }
  .composer { padding: 10px 12px 12px; }
}

/* ================= Agent run timeline (kiểu Claude/Codex) ================= */
.run {
  --r-bg: #0b1020; --r-panel: #0f1629; --r-line: #1e2a44; --r-text: #cfd8e8; --r-muted: #7486a6;
  --r-accent: #58a6ff; --r-green: #3fb950; --r-red: #ff6b6b; --r-amber: #e3b341; --r-violet: #b392f0; --r-cyan: #39c5cf;
  position: relative; background: var(--r-bg); color: var(--r-text); border: 1px solid var(--r-line);
  border-radius: 12px; margin: 2px 0 12px; overflow: hidden;
  font-family: "JetBrains Mono", "Cascadia Code", Consolas, "SFMono-Regular", Menlo, monospace; font-size: 12.5px;
}
.run.live::before {
  content: ""; position: absolute; inset: 0; border-radius: 12px; padding: 1px; pointer-events: none;
  background: linear-gradient(90deg, transparent, var(--r-accent), var(--r-violet), transparent);
  background-size: 200% 100%; animation: sweep 2s linear infinite;
  -webkit-mask: linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0); -webkit-mask-composite: xor; mask-composite: exclude;
}
@keyframes sweep { from { background-position: 200% 0; } to { background-position: -200% 0; } }
.run-head {
  display: flex; align-items: center; gap: 10px; padding: 9px 12px; cursor: pointer; user-select: none;
  background: linear-gradient(180deg, rgba(88,166,255,.07), transparent);
}
.run-head .chev { color: var(--r-muted); transition: transform .15s; }
.run.open .run-head .chev { transform: rotate(90deg); }
.run-title { font-weight: 600; color: #e6edf3; }
.run.live .run-title {
  background: linear-gradient(90deg, #7486a6 0%, #e6edf3 45%, #7486a6 90%); background-size: 200% 100%;
  -webkit-background-clip: text; background-clip: text; color: transparent; animation: shimmer 1.6s linear infinite;
}
@keyframes shimmer { from { background-position: 200% 0; } to { background-position: -200% 0; } }
.run-stats { margin-left: auto; display: flex; gap: 10px; color: var(--r-muted); font-size: 11.5px; flex-wrap: wrap; justify-content: flex-end; }
.run-stats b { color: var(--r-text); font-weight: 600; }
.run-body { display: none; padding: 4px 10px 10px; border-top: 1px solid var(--r-line); max-height: 560px; overflow-y: auto; }
.run.open .run-body { display: block; }

.st { position: relative; }
.st-row {
  display: flex; align-items: center; gap: 8px; padding: 4px 6px; border-radius: 6px; cursor: pointer; min-height: 26px;
}
.st-row:hover { background: var(--r-panel); }
.st-children { margin-left: 14px; padding-left: 10px; border-left: 1px dashed var(--r-line); }
.st-ico { width: 14px; text-align: center; flex-shrink: 0; }
.st-ico.ok { color: var(--r-green); } .st-ico.err { color: var(--r-red); }
.spin { display: inline-block; width: 11px; height: 11px; border: 2px solid var(--r-line); border-top-color: var(--r-accent); border-radius: 50%; animation: rot .7s linear infinite; vertical-align: -1px; }
@keyframes rot { to { transform: rotate(360deg); } }
.tag { font-size: 10px; font-weight: 700; letter-spacing: .06em; padding: 1px 6px; border-radius: 4px; flex-shrink: 0; border: 1px solid currentColor; opacity: .95; }
.tag.skill { color: var(--r-violet); } .tag.decision { color: var(--r-amber); } .tag.tool { color: var(--r-cyan); }
.tag.llm { color: var(--r-accent); } .tag.check { color: var(--r-green); } .tag.think { color: #9aa7bd; }
.st-title { color: #e6edf3; white-space: nowrap; }
.st-sum { color: var(--r-muted); overflow: hidden; text-overflow: ellipsis; white-space: nowrap; flex: 1; min-width: 0; }
.st-sum.err { color: var(--r-red); }
.st-model { font-size: 10.5px; color: var(--r-muted); border: 1px solid var(--r-line); border-radius: 4px; padding: 0 5px; flex-shrink: 0; }
.st-time { color: var(--r-muted); font-variant-numeric: tabular-nums; flex-shrink: 0; min-width: 44px; text-align: right; }
.st-detail { display: none; margin: 2px 0 8px 22px; padding: 8px 10px; background: var(--r-panel); border: 1px solid var(--r-line); border-radius: 8px; }
.st.open > .st-detail { display: block; }
.st-detail pre { background: #070b16; border: 1px solid var(--r-line); color: #d6deeb; border-radius: 6px; padding: 8px; margin: 6px 0; white-space: pre-wrap; overflow-x: auto; font-size: 12px; }
.st-detail .lbl { color: var(--r-muted); font-size: 11px; text-transform: uppercase; letter-spacing: .05em; margin-top: 6px; }
.st-detail table { font-size: 11.5px; min-width: 0; }
.st-detail th, .st-detail td { border-color: var(--r-line); padding: 3px 7px; }
.st-detail th { background: #121b31; color: var(--r-text); }
.kw { color: #ff7b72; font-weight: 600; } .str { color: #a5d6ff; } .numk { color: #79c0ff; } .fn { color: #d2a8ff; }
.opt { display: grid; grid-template-columns: 18px minmax(120px, 1fr) 120px 42px; gap: 8px; align-items: center; padding: 2px 0; }
.opt.chosen { color: #fff; font-weight: 600; }
.opt .bar { height: 6px; background: #1a2440; border-radius: 3px; overflow: hidden; }
.opt .bar i { display: block; height: 100%; background: linear-gradient(90deg, var(--r-accent), var(--r-violet)); }
.opt.chosen .bar i { background: linear-gradient(90deg, var(--r-green), var(--r-cyan)); }
.opt .pct { text-align: right; color: var(--r-muted); font-variant-numeric: tabular-nums; }
.grid2 { display: grid; grid-template-columns: max-content 1fr; gap: 3px 12px; }
.grid2 > :nth-child(odd) { color: var(--r-muted); }
.run-foot { display: flex; gap: 12px; flex-wrap: wrap; color: var(--r-muted); font-size: 11px; padding: 8px 6px 0; border-top: 1px dashed var(--r-line); margin-top: 6px; }
.hide-trace .run { display: none; }

.plan-step { padding: 3px 0; }
.plan-step .tag { font-size: 9.5px; }

/* ---------- Chọn DB trên thanh trên cùng ---------- */
.db-picker { display: flex; align-items: center; gap: 6px; border: 1px solid var(--border); border-radius: 8px;
  padding: 4px 8px; background: var(--bg); }
.db-picker select { border: 0; background: transparent; color: var(--text); font: inherit; font-weight: 600; cursor: pointer; max-width: 180px; }
.db-dot { width: 8px; height: 8px; border-radius: 50%; background: var(--ok); flex-shrink: 0; }
.db-dot.off { background: var(--err); }
.db-dialect { font-size: 10.5px; font-weight: 700; letter-spacing: .05em; text-transform: uppercase; color: var(--muted);
  border: 1px solid var(--border); border-radius: 4px; padding: 0 5px; }
@media (max-width: 760px) { .db-dialect { display: none; } .db-picker select { max-width: 110px; } }