:root {
  --bg: #f6f7f9; --surface: #ffffff; --text: #16181d; --muted: #667085; --border: #e3e6eb;
  --accent: #1f6feb; --accent-ink: #ffffff; --demo: #b45309; --demo-bg: #fff4e5; --ok: #067647; --ok-bg: #e7f6ec;
  --err: #b42318; --user-bubble: #1f6feb; --row-alt: #fafbfc;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0f1115; --surface: #171a21; --text: #e6e8ec; --muted: #98a2b3; --border: #2a2f3a;
    --accent: #4c8dff; --demo: #f5a524; --demo-bg: #2b2111; --ok: #4ade80; --ok-bg: #0f2a1a; --err: #f97066;
    --user-bubble: #2d5bd1; --row-alt: #1b1f27;
  }
}
* { box-sizing: border-box; }
html, body { margin: 0; height: 100%; }
body { background: var(--bg); color: var(--text); font: 15px/1.5 -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif; }
.hidden { display: none !important; }
button { font: inherit; cursor: pointer; }
.link { background: none; border: 0; color: var(--accent); padding: 4px 6px; }
.error { color: var(--err); min-height: 1.4em; margin: 0; }

.login { min-height: 100%; display: grid; place-items: center; padding: 16px; }
.card { background: var(--surface); border: 1px solid var(--border); border-radius: 14px; }
.login-card { width: 100%; max-width: 360px; padding: 24px; display: grid; gap: 14px; }
.login-card label { display: grid; gap: 4px; color: var(--muted); font-size: 13px; }
input, textarea { font: inherit; color: var(--text); background: var(--bg); border: 1px solid var(--border); border-radius: 10px; padding: 10px 12px; }
.login-card button, .ask button { background: var(--accent); color: var(--accent-ink); border: 0; border-radius: 10px; padding: 10px 14px; }

.brand { display: flex; align-items: center; gap: 8px; font-weight: 600; }
.logo { display: inline-grid; place-items: center; width: 28px; height: 28px; border-radius: 8px; background: var(--accent); color: #fff; font-size: 12px; }

.app { display: flex; flex-direction: column; height: 100dvh; }
.topbar { display: flex; justify-content: space-between; align-items: center; gap: 8px; padding: 10px 16px; border-bottom: 1px solid var(--border); background: var(--surface); }
.badges { display: flex; align-items: center; gap: 6px; flex-wrap: wrap; justify-content: flex-end; }
.badge { font-size: 11px; font-weight: 600; letter-spacing: .02em; padding: 3px 8px; border-radius: 999px; border: 1px solid var(--border); white-space: nowrap; }
.badge.demo { color: var(--demo); background: var(--demo-bg); border-color: transparent; }
.badge.live { color: var(--ok); background: var(--ok-bg); border-color: transparent; }
.badge.muted { color: var(--muted); }

.thread { flex: 1; overflow-y: auto; padding: 16px; display: flex; flex-direction: column; gap: 14px; max-width: 980px; width: 100%; margin: 0 auto; }
.welcome h1 { font-size: 20px; margin: 8px 0; }
.welcome p { color: var(--muted); margin: 0 0 12px; }
.chips { display: flex; flex-wrap: wrap; gap: 8px; }
.chip { background: var(--surface); border: 1px solid var(--border); color: var(--text); border-radius: 999px; padding: 6px 12px; text-align: left; font-size: 13px; }
.chip:hover { border-color: var(--accent); }

.msg { max-width: 100%; }
.msg.user { align-self: flex-end; background: var(--user-bubble); color: #fff; padding: 9px 14px; border-radius: 14px 14px 4px 14px; max-width: 85%; white-space: pre-wrap; }
.msg.bot { align-self: stretch; background: var(--surface); border: 1px solid var(--border); border-radius: 14px; padding: 14px; }
.msg.bot .answer { white-space: pre-wrap; margin: 0 0 6px; }
.meta-line { color: var(--muted); font-size: 12px; display: flex; flex-wrap: wrap; gap: 4px 12px; margin-bottom: 6px; }
.note { color: var(--demo); font-size: 12px; margin-bottom: 6px; }
.result { border-top: 1px solid var(--border); margin-top: 10px; padding-top: 10px; }
.result h3 { font-size: 14px; margin: 0 0 6px; }
.nodata { color: var(--demo); font-weight: 600; }
.table-wrap { overflow-x: auto; border: 1px solid var(--border); border-radius: 10px; max-height: 420px; overflow-y: auto; }
table { border-collapse: collapse; width: 100%; font-size: 13px; }
th, td { padding: 6px 10px; text-align: left; vertical-align: top; border-bottom: 1px solid var(--border); }
th { position: sticky; top: 0; background: var(--surface); color: var(--muted); font-weight: 600; white-space: nowrap; }
tr:nth-child(even) td { background: var(--row-alt); }
td.num { text-align: right; font-variant-numeric: tabular-nums; white-space: nowrap; }
details.evidence { margin-top: 8px; font-size: 13px; }
details.evidence summary { cursor: pointer; color: var(--accent); }
details.evidence dl { display: grid; grid-template-columns: max-content 1fr; gap: 4px 12px; margin: 8px 0 0; }
details.evidence dt { color: var(--muted); }
details.evidence dd { margin: 0; }
code { font-size: 12px; background: var(--bg); padding: 1px 5px; border-radius: 4px; }
.typing { color: var(--muted); font-style: italic; }

.composer { border-top: 1px solid var(--border); background: var(--surface); padding: 8px 16px 12px; }
.composer > * { max-width: 980px; margin: 0 auto; }
.filters summary { color: var(--muted); font-size: 13px; cursor: pointer; padding: 4px 0; }
.filter-row { display: flex; flex-wrap: wrap; gap: 8px; align-items: center; padding: 4px 0 8px; font-size: 13px; color: var(--muted); }
.filter-row input { padding: 6px 8px; }
.ask { display: flex; gap: 8px; align-items: flex-end; }
.ask textarea { flex: 1; resize: none; max-height: 160px; }
.ask button { height: 44px; width: 48px; font-size: 18px; }
.ask button:disabled { opacity: .5; }

@media (max-width: 600px) {
  .topbar .brand span:last-child { display: none; }
  .msg.user { max-width: 92%; }
  details.evidence dl { grid-template-columns: 1fr; }
}

.msg-links { white-space: normal; font-variant-numeric: tabular-nums; }
.msg-links a { color: var(--accent); text-decoration: none; }
.msg-links a:hover { text-decoration: underline; }
.result .csv { margin-top: 8px; font: inherit; font-size: .85em; border: 1px solid var(--border); background: var(--surface);
  color: var(--accent); border-radius: 8px; padding: 5px 10px; cursor: pointer; }
.result .csv:hover { border-color: var(--accent); }

.action-box { margin: 10px 0; padding: 10px 12px; border: 1px solid #e0b252; border-radius: 8px; background: #fff8e8; }
.action-box p { margin: 0 0 8px; white-space: pre-line; }
.action-btns { display: flex; gap: 8px; flex-wrap: wrap; }
.action-btns button { padding: 7px 14px; border-radius: 6px; border: 1px solid #b9b9b9; background: #fff; cursor: pointer; font: inherit; }
.action-btns button.confirm { background: #1f7a3f; border-color: #1f7a3f; color: #fff; }

.tabs { display: flex; gap: 4px; }
.tab { background: none; border: 1px solid transparent; color: var(--muted); border-radius: 8px; padding: 5px 10px; font-size: 14px; }
.tab.active { color: var(--text); background: var(--bg); border-color: var(--border); font-weight: 600; }

.report-head .hint { color: var(--muted); margin: 0 0 8px; font-size: 13px; }
.report-head .primary { background: var(--accent); color: var(--accent-ink); border: 0; border-radius: 8px; padding: 6px 14px; }
#report-out .table-wrap { max-height: none; }
#report-out tbody tr:first-child td { font-weight: 700; }
@media (max-width: 600px) { .tab { padding: 5px 7px; font-size: 13px; } }
.report-tabs { display: flex; flex-wrap: wrap; gap: 6px; margin: 8px 0 6px; }
.rtab { background: var(--surface); border: 1px solid var(--border); color: var(--muted); border-radius: 999px; padding: 6px 14px; font-size: 14px; }
.rtab.active { color: var(--accent-ink); background: var(--accent); border-color: var(--accent); font-weight: 600; }
.user-form { padding: 14px; display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 10px; align-items: end; margin-bottom: 14px; }
.user-form h3 { grid-column: 1 / -1; margin: 0; font-size: 15px; }
.user-form label { display: grid; gap: 4px; color: var(--muted); font-size: 13px; }
.user-form .error { grid-column: 1 / -1; }
.user-form .primary, .report-head .primary { background: var(--accent); color: var(--accent-ink); border: 0; border-radius: 8px; padding: 9px 14px; }
select { font: inherit; color: var(--text); background: var(--bg); border: 1px solid var(--border); border-radius: 8px; padding: 6px 8px; }
.users-table { max-height: none; }
.users-table td select { margin: 2px 4px 2px 0; }
.users-table .pw-box input { width: 150px; padding: 5px 8px; }
.users-table tr.inactive td { opacity: .55; }
.muted { color: var(--muted); font-size: 12px; }
.msg-time { font-size: 11px; opacity: .75; text-align: right; margin-top: 2px; }
.msg-time-bot { font-variant-numeric: tabular-nums; }
.history { display: flex; flex-direction: column; gap: 14px; }
.history-btn { align-self: center; background: var(--surface); border: 1px solid var(--border); color: var(--accent); border-radius: 999px; padding: 6px 14px; font-size: 13px; }
.history-btn:hover { border-color: var(--accent); }
.history-label { align-self: center; color: var(--muted); font-size: 12px; border-bottom: 1px dashed var(--border); padding: 0 12px 2px; }