/* FB-REDESIGN-THREADS-0928 — Threads as the room (the founder's Slack pick, 28 Sep 2026), with "Add agent" and "Ask Maven".
   The page's own composer (#f2-comp: the five types Post · StoryBoard · Poll · Debate · Video, Attach, Topic, audience, Post)
   and its own post cards (.pnl) are KEPT and re-set; nothing is rebuilt. Same bytes on both faces. */
:is(#mc-board,#fsn-board) .bd-streamwrap{gap:0;grid-template-columns:minmax(0,1fr) 300px}
:is(#mc-board,#fsn-board) .bd-streamwrap>.bd-panel{background:none;border:0;border-radius:0;padding:0;box-shadow:none;min-width:0}
:is(#mc-board,#fsn-board) .bd-streamwrap>.bd-panel>.bd-phead{display:none}
:is(#mc-board,#fsn-board) .bd-rrail{border-left:1px solid var(--ln);padding:14px 18px;position:sticky;top:calc(var(--mctop,64px) + 0px);gap:18px}
:is(#mc-board,#fsn-board) .bd-streamwrap.fbt-nodet{grid-template-columns:minmax(0,1fr)}
:is(#mc-board,#fsn-board) .bd-streamwrap.fbt-nodet .bd-rrail{display:none}
/* the channel header */
:is(#mc-board,#fsn-board) .fbt-chead{display:flex;align-items:center;gap:10px;padding:10px 20px;border-bottom:1px solid var(--ln)}
:is(#mc-board,#fsn-board) .fbt-chead h3{margin:0;font:700 15px Inter;display:flex;align-items:center;gap:6px;color:var(--tx)}
:is(#mc-board,#fsn-board) .fbt-chead h3 .fbr-ri{width:16px;height:16px;color:var(--fbm)}
:is(#mc-board,#fsn-board) .fbt-chead .d{font:500 12px Inter;color:var(--fbm);white-space:nowrap;overflow:hidden;text-overflow:ellipsis;min-width:0}
:is(#mc-board,#fsn-board) .fbt-chead .sp{flex:1}
:is(#mc-board,#fsn-board) .fbt-chead .pile{display:inline-flex;align-items:center;border:1px solid var(--ln);border-radius:8px;padding:3px 8px 3px 4px;gap:6px;font:600 11.5px Inter;color:var(--fbm)}
:is(#mc-board,#fsn-board) .fbt-chead .pile .fbr-av{width:20px;height:20px;font-size:8px;border-radius:5px;margin-left:-6px}
:is(#mc-board,#fsn-board) .fbt-chead .pile .fbr-av:first-child{margin-left:0}
:is(#mc-board,#fsn-board) .fbt-chead .bd-btn.sm{min-height:0;padding:5px 9px;font:700 12px Inter;gap:6px}
:is(#mc-board,#fsn-board) .fbt-chead .bd-btn.ghost{background:transparent;border-color:transparent;color:var(--fbm)}
/* the composer — the page's own #f2-comp, as a Slack-like box */
:is(#mc-board,#fsn-board) #f2-comp.pnl{margin:6px 20px 14px;border:1px solid var(--ln2);border-radius:10px;background:var(--card);padding:0;box-shadow:none;position:relative}
:is(#mc-board,#fsn-board) #f2-comp.pnl:focus-within{border-color:var(--pur);box-shadow:0 0 0 3px rgba(97,93,250,.12)}
:is(#mc-board,#fsn-board) #f2-comp .tabs{display:flex;gap:2px;padding:6px 8px 0;border:0;background:none;margin:0}
:is(#mc-board,#fsn-board) #f2-comp .tabs a{border:0;background:none;padding:6px 9px;border-radius:6px;font:700 11.5px Inter;color:var(--fbm);display:inline-flex;align-items:center;gap:6px;margin:0;box-shadow:none}
:is(#mc-board,#fsn-board) #f2-comp .tabs a.on{color:var(--fbv);background:var(--fbtint)}
:is(#mc-board,#fsn-board) #f2-comp .tabs a svg{width:13px;height:13px}
:is(#mc-board,#fsn-board) #f2-comp .in{padding:4px 12px 0;display:flex;gap:10px;align-items:flex-start}
:is(#mc-board,#fsn-board) #f2-comp .f2-comp-hex{width:32px;height:35px}
:is(#mc-board,#fsn-board) #f2-comp .f2-comp-hex svg{width:32px;height:35px}
:is(#mc-board,#fsn-board) #f2-comp #f2-composer-text{border:0;background:transparent;resize:none;min-height:44px;padding:8px 0;font:400 13.5px/1.5 Inter;color:var(--tx);box-shadow:none;border-radius:0}
:is(#mc-board,#fsn-board) #f2-comp #f2-composer-text:focus{border:0;box-shadow:none;outline:0}
:is(#mc-board,#fsn-board) #f2-comp .ft{display:flex;align-items:center;gap:2px;padding:4px 8px 8px;border:0;background:none;flex-wrap:wrap}
:is(#mc-board,#fsn-board) #f2-comp .ft .cx-btn,:is(#mc-board,#fsn-board) #f2-comp .ft .fs-audsel-btn{border:0;background:none;border-radius:6px;padding:6px 8px;font:700 11.5px Inter;color:var(--fbm);display:inline-flex;align-items:center;gap:6px;box-shadow:none}
:is(#mc-board,#fsn-board) #f2-comp .ft .cx-btn:hover,:is(#mc-board,#fsn-board) #f2-comp .ft .fs-audsel-btn:hover{background:var(--card2);color:var(--tx)}
:is(#mc-board,#fsn-board) #f2-comp .ft .fbt-agent{border:1px solid rgba(97,93,250,.3);background:none;border-radius:6px;padding:6px 8px;font:700 11.5px Inter;color:var(--fbv);display:inline-flex;align-items:center;gap:6px;cursor:pointer}
:is(#mc-board,#fsn-board) #f2-comp .ft .fbt-agent .fbr-ri{width:14px;height:14px}
:is(#mc-board,#fsn-board) #f2-comp .ft .fbt-sp{flex:1}
:is(#mc-board,#fsn-board) #f2-comp .ft #f2-post-btn{margin-left:auto;padding:6px 12px;border-radius:8px;font:700 12px Inter}
/* the agent picker */
/* BOARD-AGENT-PICKER-1001: fixed and placed by fbr-threads.js against the button that opened it (below/above, clamped);
   z 1050 = above the board's tab nav (#n2nav, 130), under the fixed header (.header, 1100) and every modal layer */
:is(#mc-board,#fsn-board) .fbt-agents{position:fixed;top:0;left:0;width:min(360px,calc(100vw - 16px));max-height:calc(100vh - 16px);overflow-y:auto;overscroll-behavior:contain;background:var(--card);border:1px solid var(--ln);border-radius:12px;box-shadow:0 18px 40px rgba(34,35,58,.2);padding:6px;z-index:1050;display:none}
html.fs-dark :is(#mc-board,#fsn-board) .fbt-agents{background:#1d1e2b}
:is(#mc-board,#fsn-board) .fbt-agents.on{display:block}
:is(#mc-board,#fsn-board) .fbt-agents .hd{padding:8px 10px 4px;font:800 10px/1 Inter;letter-spacing:.12em;text-transform:uppercase;color:var(--fbm)}
:is(#mc-board,#fsn-board) .fbt-agents .ag{display:grid;grid-template-columns:32px minmax(0,1fr) auto;gap:0 10px;align-items:center;padding:8px 10px;border-radius:8px}
:is(#mc-board,#fsn-board) .fbt-agents .ag:hover{background:var(--fbtint)}
:is(#mc-board,#fsn-board) .fbt-agents .ag>.fbr-av{grid-column:1;grid-row:1/span 2}
:is(#mc-board,#fsn-board) .fbt-agents .ag>b,:is(#mc-board,#fsn-board) .fbt-agents .ag>.d{grid-column:2}
:is(#mc-board,#fsn-board) .fbt-agents .ag b{font:700 12.5px Inter;display:flex;flex-wrap:wrap;align-items:center;gap:3px 6px;min-width:0;color:var(--tx)}
:is(#mc-board,#fsn-board) .fbt-agents .ag b .nm{min-width:0;max-width:100%;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
:is(#mc-board,#fsn-board) .fbt-agents .ag b .fbr-loz{flex:none;white-space:nowrap}
:is(#mc-board,#fsn-board) .fbt-agents .ag>.d{font:500 11.5px Inter;color:var(--fbm)}
:is(#mc-board,#fsn-board) .fbt-agents .ag>.bd-btn{grid-column:3;grid-row:1/span 2;min-height:0;padding:5px 9px;font:700 12px Inter;white-space:nowrap}
:is(#mc-board,#fsn-board) .fbt-agents .ag.in .bd-btn{color:var(--fbok);border-color:transparent;background:var(--fboks)}
:is(#mc-board,#fsn-board) .fbt-agents .ft{padding:8px 10px 6px;border-top:1px solid var(--ln);margin-top:4px;font:500 11px/1.45 Inter;color:var(--fbm)}
:is(#mc-board,#fsn-board) .fbt-agents .ft b{color:var(--tx);font-weight:600}
:is(#mc-board,#fsn-board) .fbt-mv{width:15px;height:15px;flex:none;display:inline-block;vertical-align:-3px;object-fit:contain}
:is(#mc-board,#fsn-board) .fbr-av.mvav{background:var(--card);border:1px solid var(--ln2);border-radius:8px}
:is(#mc-board,#fsn-board) .fbr-av.mvav .fbt-mv{width:70%;height:70%}
/* the room: system lines, day dividers, the page's own post cards as message rows */
:is(#mc-board,#fsn-board) .fbt-day{display:flex;align-items:center;gap:10px;margin:10px 20px;color:var(--fbm)}
:is(#mc-board,#fsn-board) .fbt-day::before,:is(#mc-board,#fsn-board) .fbt-day::after{content:"";flex:1;height:1px;background:var(--ln)}
:is(#mc-board,#fsn-board) .fbt-day span{font:700 11px Inter;border:1px solid var(--ln);border-radius:12px;padding:3px 10px;background:var(--card)}
:is(#mc-board,#fsn-board) .fbt-sys{padding:4px 20px 4px 68px;font:500 12px Inter;color:var(--fbm);display:flex;align-items:center;gap:7px;flex-wrap:wrap}
:is(#mc-board,#fsn-board) .fbt-sys .fbr-ri{width:13px;height:13px;color:var(--fbv)}
:is(#mc-board,#fsn-board) .fbt-sys b{color:var(--tx);font-weight:600}
:is(#mc-board,#fsn-board) .fbt-sys .fbr-loz{font-size:9.5px;padding:1px 5px}
:is(#mc-board,#fsn-board) #bd-threads .pnl:not(#f2-comp){border:0;border-radius:0;background:none;box-shadow:none;padding:6px 20px;margin:0;position:relative}
:is(#mc-board,#fsn-board) #bd-threads .pnl:not(#f2-comp):hover{background:var(--card2)}
:is(#mc-board,#fsn-board) .fbt-acts{position:absolute;right:20px;top:-10px;display:none;gap:2px;background:var(--card);border:1px solid var(--ln);border-radius:7px;padding:2px;box-shadow:0 2px 8px rgba(34,35,58,.12);z-index:3}
:is(#mc-board,#fsn-board) .pnl:hover>.fbt-acts,:is(#mc-board,#fsn-board) .pnl:focus-within>.fbt-acts{display:inline-flex}
:is(#mc-board,#fsn-board) .fbt-acts button{border:0;background:none;height:26px;min-width:26px;padding:0 6px;border-radius:5px;color:var(--fbm);display:inline-flex;align-items:center;justify-content:center;gap:5px;cursor:pointer;font:700 11px Inter}
:is(#mc-board,#fsn-board) .fbt-acts button:hover{background:var(--card2);color:var(--tx)}
:is(#mc-board,#fsn-board) .fbt-acts button .fbr-ri{width:13px;height:13px}
:is(#mc-board,#fsn-board) .bd-empty.fbt-empty{padding:40px 20px;text-align:left}
:is(#mc-board,#fsn-board) .fbt-coming{font:600 10px Inter;letter-spacing:.06em;text-transform:uppercase;color:var(--fbm);border:1px solid var(--ln);border-radius:5px;padding:2px 5px}
@media(max-width:1000px){
  :is(#mc-board,#fsn-board) .bd-streamwrap.fbt-det .bd-rrail{display:flex;position:fixed;inset:auto 0 0 0;height:70vh;z-index:1300;background:var(--card);border-left:0;border-top:1px solid var(--ln);border-radius:16px 16px 0 0;box-shadow:0 -14px 40px rgba(34,35,58,.26);overflow-y:auto}
  :is(#mc-board,#fsn-board) .fbt-chead{padding:10px 14px}
  :is(#mc-board,#fsn-board) .fbt-chead .d,:is(#mc-board,#fsn-board) .fbt-chead .pile{display:none}
  :is(#mc-board,#fsn-board) #f2-comp.pnl{margin:6px 10px 12px}
  :is(#mc-board,#fsn-board) #f2-comp .tabs{overflow-x:auto;scrollbar-width:none}
  /* BOARD-AGENT-PICKER-1001: the phone bottom-corner rule is gone — the picker is placed against its button at every width */
  :is(#mc-board,#fsn-board) .fbt-sys{padding-left:14px}
  :is(#mc-board,#fsn-board) #bd-threads .pnl:not(#f2-comp){padding:6px 14px}
}