/* Vibe Modeling — chat canvas.
   Design contract: product spec v2 §9 (user journey and UX design system).

   Neutral surfaces match the model explorer. Muted tensor colors and a
   restrained violet accent identify structure, state, and primary actions.
   Every result retains its provenance label.

   Shape rule (locked, shared with the landing): cards 12px radius, controls
   and inputs 8px, pills 999px. One primary button, one ghost. */

:root{
  --paper:#f5f6f8; --paper2:#ffffff; --card:#ffffff; --ink:#131d3b;
  --ink2:#465273; --ink3:#6b7590;
  --line:rgba(96,114,146,.22); --line2:rgba(96,114,146,.10);
  --accent:#1a56ff; --accent-ink:#0f47e6; --accent-soft:rgba(26,86,255,.10);
  --ok:#137a4a; --ok-soft:rgba(19,122,74,.10);
  --bad:#b42318; --bad-soft:rgba(180,35,24,.10);
  /* Match the landing explorer using local faces; keep technical values mono. */
  --sans:"Avenir Next","Segoe UI",Arial,sans-serif;
  --display:"Avenir Next","Segoe UI",Arial,sans-serif;
  --mono:"SF Mono","JetBrains Mono","IBM Plex Mono",Menlo,ui-monospace,Consolas,monospace;
  --shadow:0 1px 2px rgba(40,48,61,.06);
  --shadow-lift:0 10px 34px rgba(40,48,61,.10);
  --e:cubic-bezier(.22,1,.36,1); --io:cubic-bezier(.65,0,.35,1);
  --r-card:12px;
  --rail:min(46vw, 560px);
}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0; background:var(--paper); color:var(--ink);
  font-family:var(--sans); font-size:15px; line-height:1.55;
  height:100dvh; overflow:hidden;
}
button{font:inherit}
:focus-visible{outline:2px solid var(--accent); outline-offset:2px}

/* ---------- shell ---------- */
.shell{display:flex; flex-direction:column; height:100dvh}
.topbar{
  flex:none; background:var(--paper); border-bottom:1px solid var(--line);
  display:flex; align-items:center; gap:12px; padding:10px 18px; flex-wrap:wrap;
}
.brand{font-family:var(--display); font-weight:650; font-size:17px; letter-spacing:.01em;
  text-decoration:none; color:var(--ink);
  display:inline-flex; align-items:center; min-height:40px; padding:4px 0;
  transition:color .3s var(--e)}
.brand:hover{color:var(--accent-ink)}
.brand .dot{color:var(--accent)}
.brand{gap:9px}
.brand-mark{width:26px; height:26px; border-radius:7px; flex:none; box-shadow:0 6px 16px -8px rgba(26,86,255,.8)}
.brand-word{font:500 19px/1 var(--display); letter-spacing:-.02em; color:var(--ink)} .brand-word b{font-weight:800}
.domain{font-size:12px; color:var(--ink3); font-family:var(--mono); letter-spacing:.08em; text-transform:uppercase; padding-left:12px; border-left:1px solid var(--line)}
.topbar .spacer{margin-left:auto}
.legend{display:flex; gap:6px; align-items:center; font-size:11px; color:var(--ink3)}
.backend-chip{
  font-family:var(--mono); font-size:11.5px; padding:4px 9px; border-radius:4px;
  border:1px solid var(--line); color:var(--ink2); letter-spacing:.03em;
}
.main{flex:1; display:flex; min-height:0}

/* ---------- lineage chips: structural, every number gets one ---------- */
.lin{
  display:inline-block; font-family:var(--mono); font-size:11px; line-height:1.2;
  padding:3px 7px; border-radius:3px; border:1px solid var(--line);
  color:var(--ink2); background:transparent; white-space:nowrap; vertical-align:1px;
  letter-spacing:.04em;
}
.lin[data-l="measured"]{background:var(--accent); border-color:var(--accent);
  color:var(--paper); font-weight:600}
.lin[data-l="test_fixture"]{border-style:dashed}
.lin[data-l="estimate"],.lin[data-l="estimated"]{border-color:var(--accent); color:var(--accent-ink)}
.lin[data-l="indicative"]{border-style:dotted; border-color:var(--accent); color:var(--accent-ink)}
.lin[data-l="model_judged"]{border-style:double}
.lin[data-l="unavailable"]{color:var(--ink3)}
.lin[data-l="reported"]{border-style:dashed; color:var(--ink2)}
.disc{margin:10px 0}
.disc-counts{font-family:var(--mono); font-size:11.5px; color:var(--ink3); margin:0 0 8px}
.disc-row{border:1px solid var(--line); border-radius:10px; padding:9px 12px; margin:6px 0}
.disc-row.pick{cursor:pointer}
.disc-row.pick input{margin-right:8px}
.disc-head{display:flex; gap:8px; align-items:center; flex-wrap:wrap; font-size:13.5px}
.disc-head .mono{font-weight:600}
.disc-run{font-family:var(--mono); font-size:10.5px; letter-spacing:.04em; text-transform:uppercase; padding:3px 7px; border-radius:999px; border:1px solid var(--line); color:var(--ink3)}
.disc-run.now{color:var(--ok); border-color:var(--ok)}
.disc-run.load{color:var(--accent-ink); border-color:var(--accent)}
.disc-why{font-size:12px; color:var(--ink3); margin-top:4px; line-height:1.5}
.disc-rej{font-size:12px; color:var(--ink3); margin-top:8px}
.disc-rej summary{cursor:pointer}

/* ---------- chat rail ---------- */
.rail{
  flex:none; width:var(--rail); min-width:340px; border-right:1px solid var(--line);
  display:flex; flex-direction:column; min-height:0; background:var(--paper);
}
.thread{flex:1; overflow-y:auto; padding:22px 22px 8px; scroll-behavior:smooth}
.msg{margin:0 0 20px; display:flex; animation:rise .28s cubic-bezier(.16,1,.3,1)}
.msg.user{justify-content:flex-end}
.bubble{
  max-width:min(100%,52ch); background:var(--card); border:1px solid var(--line);
  border-radius:var(--r-card); padding:12px 15px; box-shadow:var(--shadow);
}
.msg.user .bubble{background:var(--accent-soft)}
.bubble p{margin:0 0 9px}
.bubble p:last-child{margin-bottom:0}
.who{font-size:11.5px; color:var(--ink3); margin-bottom:5px; letter-spacing:.02em}
.msg.user .who{text-align:right}
.qs{margin:10px 0 0; padding-left:18px; font-size:13.5px; color:var(--ink2)}
.qs li{margin:4px 0}

.composer{flex:none; border-top:1px solid var(--line); padding:12px 22px 16px;
  background:var(--paper)}
.suggest{display:flex; gap:8px; flex-wrap:wrap; margin-bottom:10px}
.suggest button{
  background:transparent; border:1px solid var(--line); color:var(--ink2); text-align:left;
  border-radius:8px; padding:7px 12px 7px 26px; font-size:12.5px; cursor:pointer; position:relative; line-height:1.4;
}
.suggest button::before{content:"›"; position:absolute; left:12px; top:6px; color:var(--accent); font-weight:700}
.suggest button{transition:border-color .3s var(--e), color .3s var(--e), background .3s var(--e)}
.suggest button:hover{border-color:var(--accent); color:var(--accent-ink); background:var(--accent-soft)}
.composerow{display:flex; gap:10px; align-items:flex-end}
.composerow .plus{
  flex:none; height:44px; padding:0 12px; border-radius:8px; border:1px solid var(--line); background:var(--card);
  color:var(--accent-ink); font:600 13px/1 var(--sans); cursor:pointer; transition:border-color .2s, background .2s;
  display:inline-flex; align-items:center; gap:6px;
}
.composerow .plus b{font-size:18px; font-weight:500; line-height:1}
.composerow .plus:hover{border-color:var(--accent); background:var(--accent-soft)}
.ask{font-size:19px; font-weight:700; letter-spacing:-.02em; margin:0 0 12px}
.ways{display:grid; gap:10px; grid-template-columns:1fr 1fr}
@media (max-width:900px){.ways{grid-template-columns:1fr}}
.way-eg{font-family:var(--mono); font-size:11px; color:var(--ink3); line-height:1.6}
.way.rec::after{content:"recommended"; position:absolute; top:12px; right:12px; font:600 10px/1 var(--mono); letter-spacing:.06em;
  text-transform:uppercase; color:var(--accent-ink); border:1px solid var(--accent); border-radius:999px; padding:5px 8px}
.way{position:relative}
.rank{display:inline-block; margin-left:8px; font:600 10.5px/1 var(--mono); letter-spacing:.05em; text-transform:uppercase;
  padding:4px 7px; border-radius:999px; border:1px solid var(--line); color:var(--ink3); vertical-align:middle}
.rank.recommended{color:var(--ok); border-color:var(--ok)}
.rank.possible{color:var(--accent-ink); border-color:var(--accent)}
.floor{font-size:12px; color:var(--ink3); display:inline-flex; align-items:center; gap:5px}
.floor input{width:64px; border:1px solid var(--line); border-radius:6px; padding:5px 7px; font:inherit; background:var(--card); color:var(--ink)}
tr.winner td{background:var(--accent-soft)}
.models-link{margin-left:14px; color:var(--accent-ink); text-decoration:none; border-bottom:1px solid transparent}
.models-link:hover{border-color:var(--accent)}
.model{border:1px solid var(--line); border-radius:10px; padding:12px 14px; margin:10px 0}
.model-head{display:flex; gap:10px; align-items:center; flex-wrap:wrap; margin-bottom:6px}
.versions{list-style:none; margin:0; padding:0; font-size:13px; color:var(--ink2)}
.versions li{padding:5px 0; border-top:1px solid var(--line2); display:flex; gap:6px; flex-wrap:wrap; align-items:center}
.versions a{color:var(--accent-ink)}
.third-way{font-size:12.5px; color:var(--ink3); margin:10px 0 0}
/* the start card folds to one line once a way is chosen */
.chosen{display:flex; align-items:center; gap:10px; flex-wrap:wrap; font-size:13.5px; color:var(--ink2)}
.chosen b{color:var(--ink)} .chosen b::before{content:"→ "; color:var(--accent)}
.chosen button{background:none; border:0; color:var(--accent-ink); font:inherit; font-weight:600; cursor:pointer; padding:0}
.third-way button{background:none; border:0; color:var(--accent-ink); font:inherit; font-weight:600; cursor:pointer; padding:0}
.composerow textarea{
  flex:1; resize:none; border:1px solid var(--line); border-radius:8px;
  padding:10px 12px; font:inherit; background:var(--card); color:var(--ink);
  min-height:44px; max-height:180px;
}
.composerow textarea:focus{outline:2px solid var(--accent); outline-offset:1px}
.hint{font-size:12px; color:var(--ink3); margin-top:7px}

/* ---------- buttons ---------- */
.btn{
  background:var(--accent); color:var(--paper); border:1px solid var(--accent);
  border-radius:8px; padding:9px 17px; font-size:13.5px; font-weight:600;
  cursor:pointer; transition:background .15s, transform .1s;
}
.btn:hover{background:var(--accent-ink); border-color:var(--accent-ink)}
.btn:active{transform:scale(.98)}
.btn:disabled{opacity:.45; cursor:default; transform:none}
.btn.ghost{background:transparent; color:var(--accent-ink); border-color:var(--line)}
.btn.ghost:hover{border-color:var(--accent); background:var(--accent-soft)}
.btn.sm{padding:6px 13px; font-size:12.5px}

/* ---------- cards ---------- */
.card{
  background:var(--card); border:1px solid var(--line); border-radius:var(--r-card);
  box-shadow:var(--shadow); margin:0 0 20px; overflow:hidden;
  animation:rise .3s cubic-bezier(.16,1,.3,1);
}
.card-head{
  display:flex; align-items:center; gap:10px; padding:13px 18px;
  border-bottom:1px solid var(--line2);
}
.card-head h3{margin:0; font-size:14.5px; font-weight:700; letter-spacing:-.01em}
.card-head .state{margin-left:auto; font-size:11.5px; color:var(--ink3);
  display:flex; align-items:center; gap:6px}
.state .pulse{width:7px; height:7px; border-radius:50%; background:var(--accent);
  animation:pulse 1.4s ease-in-out infinite}
.card-body{padding:14px 18px 16px}
.card-body > :first-child{margin-top:0}
.card-body > :last-child{margin-bottom:0}
.card-actions{display:flex; gap:10px; padding:0 18px 16px; flex-wrap:wrap}
.sub{color:var(--ink2); font-size:13.5px; margin:0 0 10px}
.kv{display:grid; grid-template-columns:minmax(120px,170px) 1fr; gap:6px 12px;
  font-size:13.5px; margin:10px 0}
.kv dt{color:var(--ink3)}
.kv dd{margin:0; overflow-wrap:anywhere}
.num{font-family:var(--mono); font-variant-numeric:tabular-nums}
.mono{font-family:var(--mono); font-size:.92em; overflow-wrap:anywhere}
.notice{
  border-left:3px solid var(--accent); background:var(--accent-soft);
  padding:9px 12px; border-radius:0 8px 8px 0; font-size:13px; margin:10px 0;
  color:var(--ink2);
}
.notice.warn{border-left-color:var(--bad); background:var(--bad-soft)}
.empty-note{color:var(--ink3); font-size:13.5px; padding:14px 0; text-align:center}
.skel{border-radius:8px; background:linear-gradient(90deg,var(--line2),var(--paper2),var(--line2));
  background-size:200% 100%; animation:shimmer 1.5s linear infinite}
.skel.line{height:14px; margin:8px 0}
.skel.block{height:70px; margin:8px 0}

/* ---------- tables ---------- */
.tblwrap{overflow-x:auto; margin:10px -18px; padding:0 18px}
table{border-collapse:collapse; width:100%; font-size:13px}
th,td{text-align:left; padding:7px 10px; border-bottom:1px solid var(--line2);
  white-space:nowrap}
th{color:var(--ink3); font-weight:600; font-size:11.5px; letter-spacing:.03em;
  text-transform:uppercase}
td.n{font-family:var(--mono); font-variant-numeric:tabular-nums}
tr.regressed td{background:var(--bad-soft)}
/* Predictions are structured JSON and can be long. Wrapping keeps the
   prediction and the user's target side by side, which is the whole point of
   showing them — a column the reader has to scroll to reach teaches nothing. */
td.wrap{white-space:normal; word-break:break-word; min-width:11ch; max-width:26ch;
  font-family:var(--mono); font-size:11.5px; line-height:1.4}

/* ---------- bars ---------- */
.bar-row{display:grid; grid-template-columns:minmax(90px,132px) 1fr auto; gap:10px;
  align-items:center; padding:6px 0; font-size:13px}
.bar-row .who2{color:var(--ink2)}
.bar-track{height:9px; background:var(--line2); border-radius:999px;
  position:relative; overflow:hidden}
.bar-fill{position:absolute; inset:0 auto 0 0; background:var(--accent);
  border-radius:999px; transition:width .5s cubic-bezier(.16,1,.3,1)}
.bar-row.adapted .bar-fill{background:var(--ink)}
.bar-ci{position:absolute; top:50%; height:1px; background:var(--ink3);
  transform:translateY(-50%)}

/* ---------- gates ---------- */
.gates{list-style:none; margin:12px 0; padding:0; display:grid; gap:8px}
.gate{border:1px solid var(--line); border-radius:10px; padding:10px 12px;
  display:grid; grid-template-columns:22px 1fr; gap:10px; font-size:13px}
.gate .mark{font-family:var(--mono); font-weight:700; text-align:center}
.gate.pass .mark{color:var(--ok)}
.gate.fail{border-color:var(--bad); background:var(--bad-soft)}
.gate.fail .mark{color:var(--bad)}
.gate.skip{opacity:.72; border-style:dashed}
.gate.skip .mark{color:var(--ink3)}
.gate .gname{font-weight:600}
.gate .gdetail{color:var(--ink2); font-size:12.5px; margin-top:3px}
.gate .gcmp{font-family:var(--mono); font-size:12px; color:var(--ink3); margin-top:3px}

.decision{
  display:flex; align-items:baseline; gap:12px; flex-wrap:wrap;
  padding:14px 16px; border-radius:12px; margin:12px 0 4px;
  border:1px solid var(--line);
}
.decision.ship{background:var(--ok-soft); border-color:var(--ok)}
.decision.noship{background:var(--paper2)}
/* the verdict badge: the landing explorer's word, same face, same colours */
.decision .word{font:800 22px/1 var(--mono); letter-spacing:-.02em; color:var(--bad)}
.decision.ship .word{color:var(--ok)}
.decision.noship{border-color:rgba(180,35,24,.4); background:var(--bad-soft)}
.decision .why{font-size:13px; color:var(--ink2); flex:1; min-width:200px}

/* ---------- canvas ---------- */
.canvaswrap{flex:1; position:relative; min-width:0; background:var(--paper2);
  overflow:hidden}
.canvas-toolbar{
  position:absolute; z-index:3; top:12px; left:12px; right:12px;
  display:flex; gap:8px; align-items:center; pointer-events:none; flex-wrap:wrap;
}
.canvas-toolbar > *{pointer-events:auto}
.canvas-title{font-size:12.5px; color:var(--ink3);
  background:var(--paper); border:1px solid var(--line); border-radius:8px;
  padding:5px 12px}
.zoomers{margin-left:auto; display:flex; gap:6px}
.zoomers button{
  width:32px; height:32px; border-radius:8px; border:1px solid var(--line);
  background:var(--paper); color:var(--ink2); cursor:pointer; font-size:14px;
  line-height:1; display:grid; place-items:center;
  transition:border-color .3s var(--e), color .3s var(--e),
             background .3s var(--e);
}
.zoomers button.wide{width:auto; padding:0 11px; font-size:12px}
.zoomers button:hover{border-color:var(--accent); color:var(--accent-ink)}
#graph{position:absolute; inset:0; cursor:grab;
  background-image:radial-gradient(var(--line) 1px, transparent 1px);
  background-size:22px 22px;}
#graph.dragging{cursor:grabbing}
#viewport{position:absolute; top:0; left:0; transform-origin:0 0;
  will-change:transform}
#edges{position:absolute; top:0; left:0; overflow:visible; pointer-events:none}
.edge{fill:none; stroke:var(--line); stroke-width:2}
.edge.live{stroke:var(--accent); stroke-dasharray:5 5; animation:flow 1s linear infinite}
.edge.done{stroke:var(--ink3)}

.node{
  position:absolute; width:214px; background:var(--card);
  border:1px solid var(--line); border-radius:12px; box-shadow:var(--shadow);
  font-size:12.5px; overflow:hidden; transition:border-color .2s, box-shadow .2s;
}
.node:hover{box-shadow:var(--shadow-lift)}
.node.selected{border-color:var(--accent); box-shadow:0 0 0 2px var(--accent-soft)}
.node .nhead{display:flex; align-items:center; gap:7px; padding:8px 11px;
  border-bottom:1px solid var(--line2); font-weight:600}
.node .ntag{font-family:var(--mono); font-size:11px; color:var(--ink3);
  border:1px solid var(--line); border-radius:3px; padding:1px 5px}
.node .nbody{padding:9px 11px; color:var(--ink2); min-height:34px}
.node .nrow{display:flex; justify-content:space-between; gap:8px; padding:1px 0}
.node .nrow b{font-family:var(--mono); font-weight:600; color:var(--ink);
  font-variant-numeric:tabular-nums}
.node .nempty{color:var(--ink3); font-style:normal}
.node .nbar{height:4px; background:var(--line2); position:relative}
.node .nbar i{position:absolute; inset:0 auto 0 0; background:var(--accent);
  transition:width .4s ease}
.node[data-state="idle"]{opacity:.62}
.node[data-state="running"]{border-color:var(--accent)}
.node[data-state="running"] .nhead{background:var(--accent-soft)}
.node[data-state="done"] .nhead{background:var(--ok-soft)}
.node[data-state="failed"]{border-color:var(--bad)}
.node[data-state="failed"] .nhead{background:var(--bad-soft)}
.node[data-state="skipped"]{opacity:.5; border-style:dashed}
.node .dot{width:7px; height:7px; border-radius:50%; background:var(--ink3); flex:none}
.node[data-state="running"] .dot{background:var(--accent); animation:pulse 1.4s ease-in-out infinite}
.node[data-state="done"] .dot{background:var(--ok)}
.node[data-state="failed"] .dot{background:var(--bad)}

.spark{display:block; width:100%; height:34px; margin-top:4px}
.spark path{fill:none; stroke:var(--accent); stroke-width:1.5}
.spark .axis{stroke:var(--line); stroke-width:1}

/* ---------- workflow rail ---------- */
.wf{list-style:none; margin:0; padding:0 18px; display:flex; align-items:center; gap:0;
  border-bottom:1px solid var(--line); background:var(--paper2); overflow-x:auto; flex:none;
  scrollbar-width:none}
.wf li{display:flex; align-items:center; gap:8px; padding:8px 0; font-size:12.5px;
  color:var(--ink3); white-space:nowrap}
.wf li + li::before{content:""; width:26px; height:1px; background:var(--line); margin:0 12px; flex:none;
  transition:background .4s ease}
.wf li[data-state="done"] + li::before{background:var(--ok)}
.wf .wf-dot{width:14px; height:14px; border-radius:50%; border:2px solid var(--line);
  box-sizing:border-box; flex:none; position:relative; transition:border-color .3s, background .3s}
.wf li[data-state="running"] .wf-dot{border-color:var(--accent-soft); border-top-color:var(--accent);
  animation:spin .8s linear infinite}
.wf li[data-state="waiting"] .wf-dot{border-color:#b98d2e; background:rgba(185,141,46,.18);
  animation:pulse 1.4s ease-in-out infinite}
.wf li[data-state="done"] .wf-dot{border-color:var(--ok); background:var(--ok)}
.wf li[data-state="done"] .wf-dot::after{content:""; position:absolute; left:3.5px; top:1px; width:3px; height:6px;
  border:solid #fff; border-width:0 2px 2px 0; transform:rotate(45deg)}
.wf li[data-state="failed"] .wf-dot{border-color:var(--bad); background:var(--bad)}
.wf li[data-state="failed"] .wf-dot::after{content:"×"; position:absolute; inset:0; color:#fff; font:700 10px/10px var(--sans); text-align:center}
.wf li[data-state="running"] .wf-name, .wf li[data-state="waiting"] .wf-name{color:var(--ink); font-weight:600}
.wf li[data-state="done"] .wf-name{color:var(--ink2)}
.wf .wf-note{font-family:var(--mono); font-size:11px; color:var(--ink3)}
.wf .wf-note:empty{display:none}
@keyframes spin{to{transform:rotate(1turn)}}

/* ---------- the canvas as an instrument: the landing's world, continued ---------- */
.canvaswrap{--paper2:#0a1020; --card:#101a33; --line:rgba(143,176,255,.28); --line2:rgba(143,176,255,.14);
  --ink:#ffffff; --ink2:#c7d0e0; --ink3:#8d99b3; --accent-soft:rgba(26,86,255,.24); --ok-soft:rgba(19,122,74,.32); --bad-soft:rgba(180,35,24,.32);
  background:radial-gradient(60% 50% at 72% 18%, rgba(26,86,255,.22), transparent 60%), radial-gradient(40% 40% at 20% 85%, rgba(0,196,255,.10), transparent 60%), #0a1020}
.canvaswrap .canvas-title{color:#aab6cc; font-family:var(--mono); font-size:11px; letter-spacing:.1em; text-transform:uppercase}
.canvaswrap .zoomers button{background:rgba(10,16,32,.8); color:#fff; border-color:rgba(143,176,255,.35)}
.canvaswrap .zoomers button:hover{border-color:#8fb0ff; color:#fff}
.canvaswrap .node{box-shadow:0 14px 34px -20px rgba(0,0,0,.9); color:var(--ink)}
/* before a Build starts the graph is the promise, and it says so */
.canvas-empty{position:absolute; z-index:2; left:50%; bottom:22px; transform:translateX(-50%); width:min(520px,calc(100% - 32px));
  background:rgba(10,16,32,.85); border:1px solid var(--line); border-radius:12px; padding:12px 16px; color:#c7d0e0; font-size:13px; line-height:1.5;
  backdrop-filter:blur(8px); pointer-events:none; animation:rise .4s var(--e)}
.canvas-empty b{color:#fff}
.canvaswrap[data-empty="false"] .canvas-empty{display:none}
.canvaswrap .node .nhead{background:rgba(26,86,255,.08)}
.canvaswrap .edge{stroke:rgba(143,176,255,.35)}
.canvaswrap .edge.live{stroke:#1a56ff} .canvaswrap .edge.done{stroke:#137a4a}
/* page transition from the landing */
@view-transition{navigation:auto}
@keyframes vt-out{to{opacity:0; transform:translateY(-6px)}} @keyframes vt-in{from{opacity:0; transform:translateY(8px)}}
::view-transition-old(root){animation:.22s ease-in both vt-out} ::view-transition-new(root){animation:.34s ease-out both vt-in}

/* ---------- teach: the first-run wedge ---------- */
.field{margin:10px 0}
.field label{display:block; font-size:12px; color:var(--ink3); margin-bottom:5px; letter-spacing:.02em}
.field input,.field select{
  width:100%; box-sizing:border-box; border:1px solid var(--line); border-radius:8px; padding:9px 11px;
  font:inherit; font-size:14px; background:var(--card); color:var(--ink);
}
.field input:focus,.field select:focus{outline:2px solid var(--accent); outline-offset:1px}
.ways{display:grid; gap:10px}
.way{
  text-align:left; display:grid; gap:5px; padding:14px 16px; cursor:pointer; font:inherit; color:var(--ink);
  background:var(--card); border:1px solid var(--line); border-radius:12px;
  transition:border-color .25s var(--e), box-shadow .25s var(--e), transform .25s var(--e);
}
.way:hover,.way:focus-visible{border-color:var(--accent); box-shadow:var(--shadow-lift); transform:translateY(-1px); outline:none}
.way-k{font-weight:700; font-size:15px; letter-spacing:-.01em}
.way-k::before{content:"→ "; color:var(--accent)}
.way-d{font-size:13px; color:var(--ink2); line-height:1.45}
.way-d em{font-style:normal; color:var(--accent-ink); font-weight:600}
.way-t{font-family:var(--mono); font-size:11px; color:var(--ink3); margin-top:2px}
.cap{position:relative; background:var(--paper2); border:1px solid var(--line); border-radius:10px; padding:10px; margin:10px 0}
.cap video{display:block; width:100%; max-height:240px; object-fit:cover; border-radius:7px; background:#000}
.cap video[hidden]{display:none}
.cap-strip{display:flex; gap:4px; flex-wrap:wrap; min-height:38px; margin-top:8px}
.cap-strip:empty{min-height:0; margin-top:0}
.cap-strip img{width:56px; height:42px; object-fit:cover; border-radius:4px; border:1px solid var(--line); animation:rise .25s var(--e)}
.cap-meter{font-family:var(--mono); font-size:11.5px; color:var(--ink3); margin-top:8px}
.cap-meter.ok{color:var(--ok); font-weight:600}
.cap-tools{display:flex; gap:8px; flex-wrap:wrap; align-items:center}
.cap-tools label.btn{display:inline-block; cursor:pointer; line-height:1.3}
.vs{display:grid; gap:6px}
.vs-row{display:flex; gap:12px; align-items:baseline; padding:8px 12px; border-radius:8px; background:var(--paper2); border:1px solid var(--line)}
.vs-row.yours{background:var(--accent-soft); border-color:var(--accent)}
.vs-k{font-size:12px; color:var(--ink3); min-width:150px}
.vs-v{font-weight:700; font-size:16px; letter-spacing:-.01em}
.vs-row.yours .vs-v{color:var(--accent-ink)}
@media (max-width:900px){
  .vs-row{flex-direction:column; gap:2px}
  .cap-strip img{width:48px; height:36px}
}

/* ---------- phones: one-row topbar ---------- */
@media (max-width:900px){
  .topbar{gap:8px 10px; padding:8px 12px}
  .topbar .legend, .topbar .domain{display:none}
  .backend-chip{margin-left:auto; font-size:10.5px; padding:4px 7px}
  .brand-word{font-size:17px}
}

/* ---------- animation ---------- */
@keyframes rise{from{opacity:0; transform:translateY(7px)} to{opacity:1; transform:none}}
@keyframes pulse{0%,100%{opacity:1} 50%{opacity:.35}}
@keyframes shimmer{from{background-position:200% 0} to{background-position:-200% 0}}
@keyframes flow{to{stroke-dashoffset:-10}}
@media (prefers-reduced-motion: reduce){
  *,*::before,*::after{animation-duration:.001ms !important; animation-iteration-count:1 !important;
    transition-duration:.001ms !important}
  .thread{scroll-behavior:auto}
}

/* ---------- responsive ---------- */
.tabs{display:none}
@media (max-width: 900px){
  .main{flex-direction:column}
  .rail{width:auto; min-width:0; border-right:none; border-bottom:1px solid var(--line)}
  .tabs{display:flex; gap:6px; padding:8px 18px; border-bottom:1px solid var(--line);
    background:var(--paper); flex:none}
  .tabs button{flex:1; border:1px solid var(--line); background:transparent;
    color:var(--ink2); border-radius:8px; padding:9px 10px; font-size:13px; cursor:pointer;
    transition:border-color .3s var(--e), color .3s var(--e), background .3s var(--e)}
  .tabs button[aria-selected="true"]{background:var(--accent-soft);
    border-color:var(--accent); color:var(--accent-ink); font-weight:600}
  .main[data-tab="chat"] .canvaswrap{display:none}
  .main[data-tab="canvas"] .rail{display:none}
  .main[data-tab="canvas"] .canvaswrap{flex:1}
}