:root {
  --bg: #f6f7f9; --panel: #fff; --text: #1d2330; --muted: #667085; --line: #e3e6eb;
  --accent: #1f5fbf; --accent-soft: #e8f0fc; --ok: #13804b; --ok-soft: #e3f5ec;
  --warn: #a35c00; --warn-soft: #fff3df; --err: #b42318; --err-soft: #fdecea;
  --radius: 8px; font-size: 15px;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #14171c; --panel: #1c2027; --text: #e6e9ee; --muted: #9aa3b2; --line: #2d333d;
    --accent: #6ea2f5; --accent-soft: #1d2b42; --ok: #4fc28a; --ok-soft: #173025;
    --warn: #f0b459; --warn-soft: #3a2c14; --err: #f2867d; --err-soft: #3b1d1b;
  }
}
* { box-sizing: border-box; }
body { margin: 0; background: var(--bg); color: var(--text); font-family: "Segoe UI", system-ui, sans-serif; }
header { display: flex; align-items: center; gap: 24px; padding: 10px 20px; background: var(--panel);
  border-bottom: 1px solid var(--line); position: sticky; top: 0; z-index: 5; flex-wrap: wrap; }
.brand { font-weight: 700; font-size: 17px; }
nav button { background: none; border: 0; padding: 8px 12px; color: var(--muted); font: inherit; cursor: pointer;
  border-radius: 6px; }
nav button.active { color: var(--accent); background: var(--accent-soft); font-weight: 600; }
.stats { margin-left: auto; color: var(--muted); font-size: 13px; display: flex; gap: 14px; flex-wrap: wrap; }
.stats b { color: var(--text); font-weight: 600; }
main { padding: 16px 20px; max-width: 1500px; margin: 0 auto; }

.btn { font: inherit; padding: 7px 14px; border-radius: 6px; border: 1px solid var(--line);
  background: var(--panel); color: var(--text); cursor: pointer; }
.btn:hover { border-color: var(--accent); }
.btn.primary { background: var(--accent); border-color: var(--accent); color: #fff; }
.btn.danger { color: var(--err); }
.btn:disabled { opacity: .5; cursor: default; }
button.link { background: none; border: 0; color: var(--accent); cursor: pointer; padding: 0; font: inherit; }
input, select, textarea { font: inherit; color: var(--text); background: var(--panel); border: 1px solid var(--line);
  border-radius: 6px; padding: 6px 8px; width: 100%; }
textarea { resize: vertical; min-height: 70px; }
label { font-size: 13px; color: var(--muted); display: block; }
label > input, label > select, label > textarea { margin-top: 3px; }

.split { display: grid; grid-template-columns: 330px minmax(0, 1fr); gap: 16px; align-items: start; }
@media (max-width: 900px) { .split { grid-template-columns: 1fr; } }
.panel { background: var(--panel); border: 1px solid var(--line); border-radius: var(--radius); padding: 14px; }
.panel + .panel { margin-top: 12px; }
.panel h3 { margin: 0 0 10px; font-size: 15px; }
.toolbar { display: flex; gap: 8px; align-items: center; flex-wrap: wrap; margin-bottom: 12px; }
.toolbar .grow { flex: 1; min-width: 160px; }

.task-list { list-style: none; margin: 0; padding: 0; }
.task-list li { padding: 10px; border-radius: 6px; cursor: pointer; border: 1px solid transparent; }
.task-list li:hover { background: var(--bg); }
.task-list li.sel { border-color: var(--accent); background: var(--accent-soft); }
.task-list .t { font-weight: 600; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.task-list .s { font-size: 12px; color: var(--muted); margin-top: 3px; display: flex; gap: 8px; align-items: center; }

.badge { display: inline-block; font-size: 12px; padding: 1px 8px; border-radius: 10px; background: var(--bg);
  color: var(--muted); white-space: nowrap; }
.badge.ok { background: var(--ok-soft); color: var(--ok); }
.badge.warn { background: var(--warn-soft); color: var(--warn); }
.badge.err { background: var(--err-soft); color: var(--err); }
.badge.run { background: var(--accent-soft); color: var(--accent); }

.issue { padding: 6px 10px; border-radius: 6px; margin: 4px 0; font-size: 13px; }
.issue.warn { background: var(--warn-soft); color: var(--warn); }
.issue.error { background: var(--err-soft); color: var(--err); }
.grid2 { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 10px; }
.full { grid-column: 1 / -1; }
.file-head { display: flex; gap: 10px; align-items: center; flex-wrap: wrap; margin-bottom: 8px; }
.file-head .name { font-weight: 600; }
.muted { color: var(--muted); font-size: 13px; }
.chunks { max-height: 420px; overflow: auto; border: 1px solid var(--line); border-radius: 6px; margin-top: 8px; }
.chunk { padding: 8px 10px; border-bottom: 1px solid var(--line); }
.chunk:last-child { border-bottom: 0; }
.chunk .h { font-weight: 600; font-size: 14px; }
.chunk .p { font-size: 12px; color: var(--muted); }
.chunk .x { white-space: pre-wrap; font-size: 13px; margin-top: 4px; }
.chunk.flag { background: var(--warn-soft); }
.chunk .acts { float: right; display: flex; gap: 10px; font-size: 13px; }
.events { font-size: 13px; max-height: 260px; overflow: auto; }
.events div { padding: 3px 0; border-bottom: 1px dashed var(--line); }
.events .warn { color: var(--warn); } .events .error { color: var(--err); }
.events time { color: var(--muted); margin-right: 8px; font-variant-numeric: tabular-nums; }
.actions { display: flex; gap: 8px; flex-wrap: wrap; margin-top: 12px; }
.errbox { background: var(--err-soft); color: var(--err); padding: 10px; border-radius: 6px; margin: 8px 0;
  white-space: pre-wrap; font-size: 13px; }
.proposal { display: flex; gap: 10px; padding: 8px; border: 1px solid var(--line); border-radius: 6px; margin: 6px 0; }
.proposal input { width: auto; margin-top: 3px; }

table.list { width: 100%; border-collapse: collapse; font-size: 14px; }
table.list th, table.list td { text-align: left; padding: 8px; border-bottom: 1px solid var(--line); vertical-align: top; }
table.list th { color: var(--muted); font-weight: 600; font-size: 13px; }
table.list tr.row:hover { background: var(--bg); cursor: pointer; }
table.list input[type=checkbox] { width: auto; }
.table-wrap { overflow-x: auto; }

.result { padding: 10px 0; border-bottom: 1px solid var(--line); }
.result .h { font-weight: 600; }
.result .x { white-space: pre-wrap; font-size: 13px; margin-top: 4px; max-height: 9em; overflow: hidden; }

.drop { border: 2px dashed var(--line); border-radius: var(--radius); padding: 30px; text-align: center; color: var(--muted);
  cursor: pointer; }
.drop.over { border-color: var(--accent); background: var(--accent-soft); }
.modal { position: fixed; inset: 0; background: rgba(0,0,0,.45); display: flex; align-items: center; justify-content: center;
  z-index: 20; padding: 16px; }
.modal.hidden, .toast.hidden, .hidden { display: none; }
.modal-box { background: var(--panel); border-radius: var(--radius); padding: 18px; width: min(560px, 100%);
  max-height: 90vh; overflow: auto; }
.modal-box h3 { margin-top: 0; }
.toast { position: fixed; bottom: 20px; left: 50%; transform: translateX(-50%); background: var(--text); color: var(--bg);
  padding: 10px 16px; border-radius: 6px; z-index: 30; max-width: 90vw; }
.checkline { display: flex; gap: 8px; align-items: center; color: var(--text); font-size: 14px; }
.checkline input { width: auto; margin: 0; }
details summary { cursor: pointer; color: var(--accent); font-size: 14px; margin-top: 8px; }

.alerts { padding: 8px 20px 0; display: flex; flex-direction: column; gap: 6px; }
.alerts:empty { display: none; }
.alert { padding: 8px 12px; border-radius: 6px; font-size: 14px; }
.alert.err { background: var(--err-soft); color: var(--err); }
.alert.warn { background: var(--warn-soft); color: var(--warn); }
.alert code { font-size: 13px; padding: 0 4px; border-radius: 4px; background: rgba(127, 127, 127, .15); }
.alert-actions { display: flex; }

/* ---- soạn thảo: hội thoại ---- */
.dv { display: grid; grid-template-columns: minmax(0, 1fr) 280px; gap: 16px; align-items: start; }
@media (max-width: 1100px) { .dv { grid-template-columns: 1fr; } }
.dv-main { display: flex; flex-direction: column; gap: 10px; }
.convo { height: 58vh; min-height: 320px; overflow-y: auto; border: 1px solid var(--line); border-radius: 6px;
  padding: 10px; background: var(--bg); display: flex; flex-direction: column; gap: 8px; }
.msg { border-radius: 8px; padding: 8px 10px; background: var(--panel); border: 1px solid var(--line); max-width: 100%; }
.msg.user { background: var(--accent-soft); border-color: transparent; align-self: flex-end; max-width: 85%; }
.msg.fail { border-color: var(--err); }
.msg-h { font-size: 12px; color: var(--muted); margin-bottom: 4px; }
.msg-b { font-size: 14px; overflow-wrap: anywhere; }
.msg details { margin-top: 6px; font-size: 13px; }
.msg summary { cursor: pointer; color: var(--muted); }
.prompt { white-space: pre-wrap; max-height: 260px; overflow: auto; font-size: 12px; background: var(--bg);
  padding: 8px; border-radius: 6px; margin: 6px 0 0; }
.pre { white-space: pre-wrap; overflow-wrap: anywhere; }
.ans-kv { margin: 2px 0; }
.ans-list { margin: 4px 0; padding-left: 20px; }
.ev { font-size: 12px; color: var(--muted); }
.ev time { margin-right: 4px; }
.ev.warn { color: var(--warn); } .ev.error { color: var(--err); }
.composer { display: flex; flex-direction: column; gap: 6px; }
.composer textarea { min-height: 70px; }
.composer-bar { display: flex; gap: 8px; align-items: center; flex-wrap: wrap; }
.composer-bar label { display: flex; align-items: center; gap: 6px; }
.grow { flex: 1; }
.thumbs { display: flex; gap: 6px; flex-wrap: wrap; }
.thumbs:empty { display: none; }
.thumb { position: relative; display: inline-block; }
.thumb img { width: 72px; height: 72px; object-fit: cover; border-radius: 6px; border: 1px solid var(--line); display: block; }
.thumb-x { position: absolute; top: -6px; right: -6px; width: 20px; height: 20px; border-radius: 50%; border: 0;
  background: var(--err); color: #fff; cursor: pointer; line-height: 20px; padding: 0; }
.dv-files h3 { margin-top: 0; }
.rf { padding: 6px 0; border-bottom: 1px solid var(--line); }
.rf:last-child { border-bottom: 0; }
.rf-open { display: flex; gap: 8px; align-items: center; background: none; border: 0; padding: 0; cursor: pointer;
  color: var(--accent); font: inherit; text-align: left; width: 100%; }
.rf-open:hover .rf-n { text-decoration: underline; }
.rf-ic { flex: none; min-width: 30px; height: 30px; border-radius: 5px; background: var(--accent-soft); color: var(--accent);
  font-size: 11px; font-weight: 700; display: grid; place-items: center; }
.rf-n { overflow-wrap: anywhere; }
.rf-m { font-size: 12px; margin: 2px 0 0 38px; }
.small { font-size: 12px; }
.issue.ok-soft { background: var(--ok-soft); color: var(--ok); }
/* ô chọn tài liệu trong kho */
.picker { border: 1px solid var(--line); border-radius: 6px; padding: 8px; }
.picker-head { margin-bottom: 6px; }
.picker-search { display: flex; gap: 6px; }
.picker-search input { flex: 1; min-width: 0; }
.picker-list { max-height: 220px; overflow-y: auto; margin-top: 6px; }
.pick-row { display: flex; gap: 8px; align-items: flex-start; padding: 4px 2px; border-bottom: 1px solid var(--line); cursor: pointer; }
.pick-row:last-child { border-bottom: 0; }
.chips { display: flex; flex-wrap: wrap; gap: 6px; margin-bottom: 6px; }
.chips:empty { display: none; }
.chip { background: var(--accent-soft); color: var(--accent); border-radius: 12px; padding: 2px 4px 2px 10px; font-size: 13px; }
.chip button { background: none; border: 0; color: inherit; cursor: pointer; font-size: 15px; padding: 0 4px; }
.pick-row input { width: auto; flex: none; margin: 3px 0 0; }
.pick-row span { flex: 1; min-width: 0; }
.picker-search input, .picker-search .btn { margin: 0; }
.modal-box { width: min(680px, 100%); }
.composer-bar label { white-space: nowrap; color: var(--text); font-size: 14px; }
.composer-bar select { width: auto; }
/* tab Tệp */
.crumbs { margin: 10px 0; display: flex; flex-wrap: wrap; gap: 4px; align-items: center; }
.br-row { cursor: default; user-select: none; }
.br-row:hover { background: var(--accent-soft); }
.br-row.sel { background: var(--accent-soft); outline: 1px solid var(--accent); }
.br-ic { display: inline-block; width: 1.4em; }

/* chọn công cụ AI (cả app dùng một công cụ) */
.engine { color: var(--muted); font-size: 13px; white-space: nowrap; display: flex; align-items: center; gap: 6px; }
.engine select { font: inherit; padding: 4px 6px; border-radius: 6px; border: 1px solid var(--line); background: var(--panel); color: var(--text); }

/* tiến trình upload */
.upload-bar { margin-top: 10px; height: 8px; border-radius: 4px; background: var(--line); overflow: hidden; }
.upload-bar > div { height: 100%; width: 0; background: var(--accent); transition: width .2s; }

/* khung task: 2 tab (Task / Nạp kho), danh sách cuộn bên trong, trang không cuộn theo */
.tasks-panel { position: sticky; top: 72px; display: flex; flex-direction: column; max-height: calc(100vh - 88px); }
.tasks-panel .task-list { flex: 1; min-height: 0; overflow-y: auto; margin-right: -6px; padding-right: 6px; }
.seg { display: flex; gap: 4px; padding: 3px; background: var(--bg); border-radius: 8px; margin-bottom: 10px; }
.seg button { flex: 1; font: inherit; border: 0; background: none; padding: 7px 8px; border-radius: 6px; color: var(--muted); cursor: pointer; }
.seg button.active { background: var(--panel); color: var(--accent); font-weight: 600; box-shadow: 0 1px 2px rgba(0,0,0,.08); }
.seg .cnt { font-size: 12px; font-weight: 400; color: var(--muted); }
@media (max-width: 900px) { .tasks-panel { position: static; max-height: 60vh; } }

/* tiến độ lấy văn bản từ Thư viện pháp luật (cạnh các nút của task) */
.actions .tv-prog { flex: 1; min-width: 220px; align-self: center; }
.tv-prog-l { font-size: 13px; color: var(--muted); }
.tv-prog .upload-bar { margin-top: 4px; }
.actions .tv-done { align-self: center; }