:root { --bg:#fafafa; --panel:#fff; --line:#e8e8e6; --line2:#f0f0ee; --ink:#1a1a1a; --muted:#7a7a76; --soft:#a3a39e; --accent:#2f6bff; --ok:#1d7a46; --warn:#b4541a; --mark:#fff2a8; --ins:#d9f5e1; --r:14px; }
* { box-sizing:border-box; }
html, body { margin:0; height:100%; background:var(--bg); color:var(--ink); font:14px/1.5 -apple-system, "Inter", "Segoe UI", Helvetica, Arial, sans-serif; }
.hidden { display:none !important; }
.app { display:grid; grid-template-columns:262px 1fr; height:100vh; transition:grid-template-columns .25s; }
.app.rail { grid-template-columns:64px 1fr; }

/* ---- sidebar ---- */
.sidebar { background:var(--panel); border-right:1px solid var(--line); display:flex; flex-direction:column; padding:14px 12px; overflow:hidden; white-space:nowrap; }
.side-top { display:flex; align-items:center; justify-content:space-between; padding:2px 4px 14px; }
.logo { display:flex; align-items:center; gap:8px; font-family:Georgia, "Times New Roman", serif; font-size:19px; }
.mark { font-size:20px; line-height:1; }
.icon-btn { border:0; background:transparent; color:var(--muted); cursor:pointer; font-size:14px; padding:4px 6px; border-radius:7px; }
.icon-btn:hover { background:var(--line2); }
ul.nav { list-style:none; margin:0; padding:0; }
ul.nav li { display:flex; align-items:center; gap:10px; padding:8px 10px; border-radius:9px; font-size:14px; cursor:pointer; color:var(--ink); }
ul.nav li:hover { background:var(--line2); }
ul.nav li.active { background:#efefed; font-weight:500; }
.ni { display:inline-block; width:14px; height:14px; border-radius:3px; background:#8a8a86; flex:none; }
.ni.small { width:11px; height:11px; }
.ni.chat { background:var(--accent); border-radius:5px 5px 5px 1px; }
.ni.ide { background:linear-gradient(90deg,#6b7bff 0 30%,#fff 30% 36%,#6b7bff 36% 66%,#fff 66% 72%,#6b7bff 72%); }
.ni.proj { background:#4f7bea; border-radius:3px 3px 2px 2px; }
.ni.lib { background:#a56d3c; }
.ni.tab { background:linear-gradient(#27a06a 0 45%,#fff 45% 55%,#27a06a 55%); }
.ni.wf { background:radial-gradient(circle at 30% 30%,#f5a623 0 30%,transparent 31%),radial-gradient(circle at 70% 70%,#2f6bff 0 30%,transparent 31%),radial-gradient(circle at 70% 30%,#e0427f 0 25%,transparent 26%); }
.ni.pb { background:#6f6f6b; border-radius:2px; }
.side-group { display:flex; justify-content:space-between; align-items:center; font-size:12.5px; font-weight:500; color:var(--muted); padding:18px 10px 6px; }
.side-group.lower { margin-top:auto; }
.side-item { font-size:13px; color:var(--muted); padding:4px 10px; }
.side-item.hist { display:flex; align-items:center; gap:8px; color:var(--ink); padding:6px 10px; border-radius:8px; }
.chev { display:inline-block; width:7px; height:7px; border-right:1.5px solid var(--muted); border-bottom:1.5px solid var(--muted); transform:rotate(45deg); margin-right:3px; }
.updown { display:inline-block; width:8px; height:8px; border-left:1.5px solid var(--muted); border-top:1.5px solid var(--muted); transform:rotate(45deg); margin-left:auto; }
.user { display:flex; align-items:center; gap:10px; padding:12px 8px 2px; border-top:1px solid var(--line); margin-top:auto; font-weight:600; font-size:14px; }
.avatar { width:26px; height:26px; border-radius:50%; background:#7b3fe4; color:#fff; font:700 10px/26px sans-serif; text-align:center; flex:none; }
.app.rail .sidebar { padding:14px 10px; }
.app.rail .word, .app.rail ul.nav li span, .app.rail .side-group, .app.rail .side-item, .app.rail .uname, .app.rail .updown, .app.rail .collapse { display:none; }
.app.rail ul.nav li { justify-content:center; padding:10px 0; }
.app.rail .side-top { justify-content:center; }
.app.rail .user { justify-content:center; padding-left:0; }

/* ---- home (screen 1) ---- */
.screen { height:100vh; overflow:auto; }
.home { position:relative; display:flex; align-items:center; justify-content:center; }
.home-tools { position:absolute; top:14px; right:18px; display:flex; gap:2px; background:#fff; border:1px solid var(--line); border-radius:10px; padding:2px; }
.home-center { width:min(880px, 92%); display:flex; flex-direction:column; align-items:center; margin-top:-40px; }
.greet { font-family:Georgia, "Times New Roman", serif; font-weight:400; font-size:36px; margin:0 0 22px; letter-spacing:-.01em; }
.greet .mark { font-size:30px; margin-right:6px; }
.composer { width:100%; background:#fff; border:1px solid var(--line); border-radius:18px; padding:16px 18px 12px; box-shadow:0 10px 36px rgba(0,0,0,.05); }
.composer-text { font-size:14.5px; color:var(--ink); line-height:1.55; max-height:150px; overflow:auto; }
.attachments { display:flex; flex-wrap:wrap; gap:7px; margin:12px 0 4px; }
.chip { display:inline-flex; align-items:center; gap:7px; padding:5px 10px 5px 5px; border:1px solid var(--line); border-radius:9px; background:#fafaf8; font-size:12.5px; }
.ico { display:inline-block; width:20px; height:20px; border-radius:5px; font:700 8.5px/20px sans-serif; text-align:center; color:#fff; letter-spacing:.02em; }
.ico.docx { background:#2b5fd9; } .ico.xlsx { background:#1d7a46; } .ico.eml { background:#8a6a1f; } .ico.txt { background:#6b6b66; }
.composer-foot { display:flex; align-items:center; gap:12px; margin-top:8px; }
.plus { font-size:20px; color:var(--muted); cursor:default; padding:0 2px; }
.model { margin-left:auto; color:var(--soft); font-size:14px; display:flex; align-items:center; gap:8px; }
.send { width:32px; height:32px; border-radius:50%; border:0; background:var(--ink); color:#fff; display:inline-flex; align-items:center; justify-content:center; padding:0; cursor:pointer; flex:none; }
.send svg { display:block; }
.send:hover { background:#000; }
.disclaimer { font-size:12.5px; color:var(--muted); margin:16px 0 0; }
.quick { display:flex; flex-direction:column; align-items:center; gap:14px; }
.qa-label { font-size:13px; font-weight:500; }
.chips { display:flex; gap:8px; flex-wrap:wrap; justify-content:center; }
.qchip { padding:8px 14px; border:1px solid var(--line); border-radius:10px; background:#fff; font-size:13px; box-shadow:0 1px 2px rgba(0,0,0,.03); }
.qchip.on { border-color:#cfd8ff; background:#f3f6ff; }

/* ---- work (screen 2) ---- */
.work { display:grid; grid-template-columns:262px 1fr 372px; height:100vh; }
.pane { height:100vh; overflow:auto; }
.pane.left { background:var(--panel); border-right:1px solid var(--line); padding:16px 12px; }
.pane.right { background:var(--panel); border-left:1px solid var(--line); padding:16px 16px; }
.pane.middle { padding:0 0 60px; }
.crumb { font-size:12px; color:var(--muted); padding:2px 8px; }
.case { font-weight:600; font-size:15px; padding:2px 8px 12px; border-bottom:1px solid var(--line); margin-bottom:6px; }
.section-label { font-size:11px; text-transform:uppercase; letter-spacing:.08em; color:var(--muted); padding:12px 8px 6px; }
ul.files { list-style:none; margin:0; padding:0; }
ul.files li { display:flex; align-items:center; gap:9px; padding:7px 8px; border-radius:8px; cursor:pointer; font-size:13.5px; }
ul.files li:hover { background:var(--line2); }
ul.files li.active { background:#eef2ff; }
ul.files li .name { flex:1; white-space:nowrap; overflow:hidden; text-overflow:ellipsis; }
ul.files li .meta { font-size:11px; color:var(--muted); }
.doc-head { position:sticky; top:0; z-index:1; background:rgba(250,250,250,.92); backdrop-filter:blur(6px); border-bottom:1px solid var(--line); padding:12px 32px; font-size:13px; color:var(--muted); display:flex; justify-content:space-between; }
.doc { max-width:860px; margin:18px auto 0; padding:34px 44px; background:var(--panel); border:1px solid var(--line); border-radius:var(--r); min-height:80vh; }
.doc pre { white-space:pre-wrap; font:13px/1.55 ui-monospace, SFMono-Regular, Menlo, monospace; margin:0; }
.doc h1 { font-family:Georgia, serif; font-weight:400; font-size:22px; margin:0 0 18px; }
.doc h2 { font-size:15px; margin:26px 0 8px; letter-spacing:.02em; }
.doc h3 { font-size:14px; margin:16px 0 4px; }
.doc p { margin:0 0 10px; font-size:14.5px; }
.cursor { display:inline-block; width:8px; height:16px; background:var(--ink); vertical-align:-3px; animation:blink 1s steps(1) infinite; }
@keyframes blink { 50% { opacity:0; } }
mark.anchor { background:var(--mark); padding:1px 0; }
mark.ins { background:var(--ins); color:#0f4d2a; padding:1px 0; }
del.old { color:#b42318; text-decoration:line-through; text-decoration-color:#b42318; background:#fdeceb; padding:1px 0; }
.card { border:1px solid var(--line); border-radius:12px; padding:14px; margin-bottom:12px; background:#fff; }
.card .k { font-size:11px; text-transform:uppercase; letter-spacing:.08em; color:var(--muted); }
.card .v { font-size:22px; font-weight:600; margin:2px 0 6px; }
.card .sub { font-size:12.5px; color:var(--muted); }
.bar { height:6px; background:#eee; border-radius:4px; overflow:hidden; margin:8px 0 2px; }
.bar i { display:block; height:100%; background:var(--accent); width:0; transition:width .2s; }
button { font:inherit; border:1px solid var(--line); background:#fff; border-radius:10px; padding:8px 16px; cursor:pointer; }
button.primary { background:var(--ink); color:#fff; border-color:var(--ink); }
button.small { padding:4px 10px; font-size:12px; border-radius:7px; }
.fix { border:1px solid var(--line); border-radius:10px; padding:10px 12px; margin-bottom:10px; background:#fff; font-size:13px; }
.fix.applied { background:#f4fbf6; }
.fix .t { font-weight:600; margin-bottom:4px; }
.fix .why { color:var(--muted); margin-bottom:6px; }
.fix .q { font-size:12.5px; border-left:2px solid #ddd; padding-left:8px; margin:6px 0; color:#444; }
.fix .q.new { border-left-color:var(--ok); color:#114d2b; }
.fix .acts { display:flex; gap:6px; margin-top:6px; }
.tally { display:flex; gap:14px; font-size:13px; margin:6px 0 10px; }
.tally b { font-size:18px; }
.ok { color:var(--ok); } .warn { color:var(--warn); }
.doc p.meta-line { color:var(--soft); font-size:12px; margin-bottom:14px; }

/* ---- provenance trace in the status card ---- */
.card .v.small { font-size:15px; font-weight:600; }
ul.trace { list-style:none; margin:10px 0 0; padding:0; font-size:12.5px; }
ul.trace li { padding:5px 0; border-top:1px solid var(--line2); color:var(--muted); display:flex; flex-wrap:wrap; gap:4px 6px; align-items:baseline; }
ul.trace li.now { color:var(--ink); }
ul.trace .val { font-weight:600; }
ul.trace .from { color:var(--soft); }
ul.trace .file { color:var(--accent); }
ul.trace .sec { width:100%; font-size:11px; color:var(--soft); }
ul.files li { position:relative; }
ul.files li.ref::before { content:""; position:absolute; left:-1px; top:50%; width:6px; height:6px; margin-top:-3px; border-radius:50%; background:var(--accent); animation:heartbeat 1.1s ease-in-out infinite; }
@keyframes heartbeat { 0%, 100% { transform:scale(1); box-shadow:0 0 0 0 rgba(47,107,255,.45); } 50% { transform:scale(1.35); box-shadow:0 0 0 5px rgba(47,107,255,0); } }

/* ---- file viewers ---- */
.doc.view-docx, .doc.view-eml, .doc.view-txt, .doc.view-xlsx { padding:34px 44px; }
.docx h1 { font-family:Georgia, serif; font-weight:400; font-size:22px; }
.docx h2 { font-size:16px; margin:22px 0 8px; } .docx h3 { font-size:14.5px; margin:16px 0 6px; }
.docx p { margin:0 0 10px; font-size:14px; } .docx li { font-size:14px; }
.docx table { border-collapse:collapse; margin:12px 0; font-size:13px; }
.docx td, .docx th { border:1px solid var(--line); padding:5px 8px; vertical-align:top; }
.doc.view-xlsx { padding:0; overflow:hidden; }
.xlsx .tabs { display:flex; gap:2px; padding:10px 12px 0; background:#f3f3f1; border-bottom:1px solid var(--line); }
.xlsx .tab { border:1px solid var(--line); border-bottom:0; border-radius:8px 8px 0 0; background:#e9e9e6; padding:6px 14px; font-size:12.5px; }
.xlsx .tab.on { background:#fff; font-weight:600; }
.xlsx .sheet { display:none; overflow:auto; max-height:78vh; } .xlsx .sheet.on { display:block; }
.xlsx table { border-collapse:collapse; font:12.5px/1.3 -apple-system, "Segoe UI", sans-serif; min-width:100%; }
.xlsx th { background:#f3f3f1; color:var(--muted); font-weight:500; border:1px solid var(--line); padding:4px 8px; position:sticky; top:0; }
.xlsx td { border:1px solid var(--line2); padding:4px 8px; white-space:nowrap; max-width:360px; overflow:hidden; text-overflow:ellipsis; }
.xlsx td.rn { background:#f3f3f1; color:var(--muted); text-align:right; width:34px; }
.xlsx td.num { text-align:right; font-variant-numeric:tabular-nums; }
.eml .headers { border-bottom:1px solid var(--line); padding-bottom:12px; margin-bottom:16px; }
.eml .h { display:flex; gap:12px; font-size:13px; padding:2px 0; }
.eml .h .k { width:64px; color:var(--muted); flex:none; } .eml .h .v { color:var(--ink); }
.eml pre.body, pre.txt { white-space:pre-wrap; font:13.5px/1.55 -apple-system, "Segoe UI", sans-serif; margin:0; }
pre.txt { font-family:ui-monospace, Menlo, monospace; font-size:12.5px; }

/* ---- knowledge graph ---- */
.ni.kg { background:radial-gradient(circle at 25% 30%,#2f6bff 0 22%,transparent 23%),radial-gradient(circle at 75% 30%,#27a06a 0 22%,transparent 23%),radial-gradient(circle at 50% 78%,#f5a623 0 22%,transparent 23%),linear-gradient(#cfd6e6,#cfd6e6) 50% 50%/1.5px 60% no-repeat; }
.graph { display:flex; flex-direction:column; overflow:hidden; grid-column:2; grid-row:1; min-width:0; }
.screen { grid-column:2; grid-row:1; min-width:0; }
.graph-top { display:flex; align-items:center; gap:12px; padding:12px 18px; border-bottom:1px solid var(--line); background:#fff; flex-wrap:wrap; }
.graph-title { font-weight:600; margin-right:6px; }
#graph-search { border:1px solid var(--line); border-radius:9px; padding:7px 10px; font:inherit; width:220px; outline:none; }
.graph-filters { display:flex; gap:6px; flex-wrap:wrap; }
.gf { font-size:12px; padding:4px 9px; border:1px solid var(--line); border-radius:8px; background:#fff; cursor:pointer; display:flex; align-items:center; gap:6px; }
.gf.off { opacity:.45; }
.gf i { width:9px; height:9px; border-radius:50%; display:inline-block; }
.toggle { font-size:12.5px; color:var(--muted); display:flex; align-items:center; gap:6px; }
.graph-stats { margin-left:auto; font-size:12px; color:var(--muted); }
.graph-body { flex:1; display:grid; grid-template-columns:1fr 380px; min-height:0; }
#graph-canvas { width:100%; height:100%; display:block; background:#fbfbfa; cursor:grab; min-height:0; }
.graph-body > * { min-height:0; }
.graph-side { border-left:1px solid var(--line); background:#fff; overflow:auto; padding:16px; font-size:13px; }
.gs-empty { color:var(--muted); }
.gs-title { font-weight:600; font-size:15px; margin-bottom:2px; }
.gs-type { font-size:11px; text-transform:uppercase; letter-spacing:.08em; color:var(--muted); margin-bottom:8px; }
.gs-desc { color:#444; margin-bottom:12px; }
.gs-docs { display:flex; flex-wrap:wrap; gap:5px; margin-bottom:12px; }
.gs-docs span { font-size:11.5px; border:1px solid var(--line); border-radius:7px; padding:2px 7px; background:#fafaf8; }
.gs-h { font-size:11px; text-transform:uppercase; letter-spacing:.08em; color:var(--muted); margin:14px 0 6px; }
.gs-fact { border-left:2px solid #ddd; padding:4px 0 4px 9px; margin-bottom:8px; cursor:pointer; }
.gs-fact.reason { border-left-color:var(--accent); }
.gs-fact .rel { font-weight:600; }
.gs-fact .oth { color:var(--accent); }
.gs-fact .ev { display:block; color:#555; font-size:12px; margin-top:2px; }
.gs-fact .src { display:block; color:var(--soft); font-size:11px; margin-top:2px; }
.legend { display:flex; gap:14px; padding:8px 18px; border-top:1px solid var(--line); background:#fff; font-size:11.5px; color:var(--muted); flex-wrap:wrap; }
.legend i { width:9px; height:9px; border-radius:50%; display:inline-block; margin-right:5px; }

.mode { display:inline-flex; border:1px solid var(--line); border-radius:9px; overflow:hidden; margin-left:6px; }
.mode-opt { border:0; border-radius:0; padding:5px 11px; font-size:12.5px; background:#fff; color:var(--muted); }
.mode-opt.on { background:var(--ink); color:#fff; }

/* ---- comparison popup ---- */
.overlay { position:fixed; inset:0; background:rgba(20,20,20,.35); display:flex; align-items:center; justify-content:center; z-index:50; }
.modal { width:min(720px, 92vw); background:#fff; border-radius:18px; padding:28px 30px 24px; box-shadow:0 30px 80px rgba(0,0,0,.25); text-align:center; }
.m-title { font-family:Georgia, serif; font-size:24px; margin-bottom:18px; }
.m-grid { display:grid; grid-template-columns:1fr auto 1fr; gap:18px; align-items:center; }
.m-col { border:1px solid var(--line); border-radius:14px; padding:18px 14px; }
.m-col.ours { border-color:#bfe3cc; background:#f4fbf6; }
.m-who { font-size:12.5px; color:var(--muted); min-height:34px; }
.m-big { font-size:40px; font-weight:600; letter-spacing:-.02em; margin:6px 0 2px; }
.m-sub { font-size:12.5px; color:var(--muted); }
.m-cost { font-size:22px; font-weight:600; margin-top:12px; }
.m-cost span { display:block; font-size:11.5px; font-weight:400; color:var(--muted); }
.m-vs { color:var(--soft); font-size:14px; }
.m-saving { margin:18px 0 10px; font-size:15px; font-weight:600; color:var(--ok); }
.m-notes { font-size:11.5px; color:var(--soft); text-align:left; display:grid; gap:4px; margin-bottom:16px; }
.mode-opt:disabled { opacity:.4; cursor:not-allowed; }

/* ---- signals ---- */
.ni.sig { background:linear-gradient(90deg,#2f6bff 0 30%,#fff 30% 36%,#27a06a 36% 66%,#fff 66% 72%,#f5a623 72%); }
.signals { padding:22px 28px; overflow:auto; }
.sig-head { display:flex; align-items:center; justify-content:space-between; margin-bottom:18px; }
.sig-title { font-size:26px; font-weight:600; letter-spacing:-.01em; } .sig-title span { color:var(--muted); font-weight:400; font-size:18px; }
.sig-live { font-size:13px; color:var(--muted); display:flex; align-items:center; gap:7px; } .sig-live i { width:8px; height:8px; border-radius:50%; background:var(--ink); display:inline-block; animation:heartbeat 1.4s ease-in-out infinite; }
.tiles { display:grid; grid-template-columns:repeat(3, 1fr); gap:16px; margin-bottom:18px; }
.tile { background:#fff; border:1px solid var(--line); border-radius:14px; padding:18px 22px; }
.tk { color:var(--muted); font-size:14px; } .tv { font-size:34px; font-weight:600; margin-top:4px; letter-spacing:-.02em; }
.feed { background:#fff; border:1px solid var(--line); border-radius:14px; overflow:hidden; }
.feed-head { display:flex; justify-content:space-between; padding:14px 20px; font-weight:600; border-bottom:1px solid var(--line); } .feed-head .sub { font-weight:400; color:var(--muted); font-size:12.5px; }
.feed .row { display:grid; grid-template-columns:110px 1fr 240px 70px; gap:14px; align-items:center; padding:13px 20px; border-bottom:1px solid var(--line2); cursor:pointer; }
.feed .row:hover { background:#fafaf8; } .feed .row.trace { cursor:default; color:var(--muted); }
.tag { font-size:12px; padding:3px 10px; border-radius:999px; background:#eeeeec; text-align:center; }
.tag.correction { background:#eeeeec; } .tag.edit { background:#e6ecff; color:#1f3fa8; } .tag.flag { background:#fdeceb; color:#8a1f16; } .tag.trace { background:#f3f3f1; color:var(--muted); }
.feed .desc { font-size:14px; } .feed .src { color:var(--muted); font-size:13px; white-space:nowrap; overflow:hidden; text-overflow:ellipsis; } .feed .when { color:var(--muted); font-size:13px; text-align:right; }
.feed .why { grid-column:1 / -1; font-size:13px; color:#333; padding:8px 0 4px 124px; cursor:default; }
.why-h { font-size:11px; text-transform:uppercase; letter-spacing:.08em; color:var(--muted); margin-bottom:4px; }
.chg { margin-top:8px; font-size:12.5px; line-height:1.55; } .chg del { color:#b42318; background:#fdeceb; text-decoration:line-through; } .chg ins { color:#0f4d2a; background:var(--ins); text-decoration:none; } .chg .keep { color:#666; }

/* ---- icons ---- */
.nv { flex:none; color:#6b6b66; }
ul.nav li.active .nv { color:var(--ink); }
.logo .mark { vertical-align:-5px; margin-right:2px; }
.greet .mark { vertical-align:-5px; margin-right:10px; }