:root{
  --ink:#101A3D;
  --ink-2:#3B4668;
  --ink-3:#7D88A8;
  --jade:#2AA5A0;
  --jade-deep:#1B7D78;
  --sky:#7FD1F7;
  --line:rgba(16,26,61,.06);
  --line-strong:rgba(16,26,61,.09);
  --glass:rgba(255,255,255,.72);
  --shadow:0 24px 60px -30px rgba(16,26,61,.25);
  --mono:ui-monospace,SFMono-Regular,"SF Mono",Menlo,Consolas,"Liberation Mono",monospace;
  --sans:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei","Source Han Sans SC","Noto Sans CJK SC",sans-serif;
}

*,*::before,*::after{box-sizing:border-box}
[hidden]{display:none !important}
html,body{height:100%}
html{-webkit-text-size-adjust:100%}
body{
  margin:0;
  font-family:var(--sans);
  font-size:15px;
  line-height:1.75;
  color:var(--ink);
  background:#F4F7FF;
  -webkit-font-smoothing:antialiased;
  -moz-osx-font-smoothing:grayscale;
  overflow:hidden;
}
body::before{
  content:"";
  position:fixed;inset:0;z-index:-3;
  background:linear-gradient(158deg,#F5F8FF 0%,#F1F5FF 42%,#EDF3FF 100%);
}
body::after{
  content:"";
  position:fixed;inset:0;z-index:-2;pointer-events:none;
  background:
    radial-gradient(58rem 40rem at 4% -8%,rgba(127,209,247,.34),transparent 62%),
    radial-gradient(46rem 34rem at 102% 104%,rgba(42,165,160,.15),transparent 64%),
    radial-gradient(30rem 26rem at 62% -12%,rgba(255,255,255,.95),transparent 70%);
}
button{font-family:inherit;color:inherit}
:focus-visible{outline:2px solid rgba(42,165,160,.55);outline-offset:2px}
.mono{font-family:var(--mono);font-variant-numeric:tabular-nums}

.ambient{
  position:fixed;inset:0;z-index:-1;pointer-events:none;
  background:
    radial-gradient(24rem 18rem at 78% 12%,rgba(255,255,255,.55),transparent 70%),
    radial-gradient(20rem 20rem at 26% 96%,rgba(127,209,247,.14),transparent 70%);
}

/* ---------- shell ---------- */
.app{
  height:100vh;height:100dvh;
  max-width:1480px;margin:0 auto;
  padding:16px;
  display:grid;
  grid-template-columns:260px minmax(0,1fr) 300px;
  gap:14px;
}
.panel{
  position:relative;
  min-height:0;
  display:flex;flex-direction:column;
  background:var(--glass);
  -webkit-backdrop-filter:blur(18px) saturate(118%);
  backdrop-filter:blur(18px) saturate(118%);
  border:1px solid var(--line);
  border-radius:22px;
  box-shadow:var(--shadow);
  animation:panel-in .55s cubic-bezier(.2,.7,.2,1) both;
}
.chat{animation-delay:.04s}
.evidence{animation-delay:.08s}
@keyframes panel-in{from{opacity:0;transform:translateY(10px)}to{opacity:1;transform:none}}

/* ---------- rail ---------- */
.rail{padding:16px 13px 12px}
.rail-head{display:flex;align-items:center;gap:10px;padding:0 3px 14px}
.mark{
  width:34px;height:34px;flex:none;border-radius:11px;display:grid;place-items:center;
  color:#fff;
  background:linear-gradient(148deg,#16224A 0%,#101A3D 58%,#1E3A63 100%);
  box-shadow:inset 0 1px 0 rgba(255,255,255,.2),0 10px 20px -12px rgba(16,26,61,.8);
}
.mark.small{width:22px;height:22px;border-radius:7px}
.brand-text{min-width:0;line-height:1.3}
.brand-text b{display:block;font-size:14px;font-weight:600;letter-spacing:.01em}
.brand-text span{display:block;font-size:10px;color:var(--ink-3);letter-spacing:.07em;margin-top:2px}
.drawer-close{
  display:none;width:28px;height:28px;margin-left:auto;border:0;border-radius:8px;
  background:rgba(16,26,61,.05);cursor:pointer;place-items:center;color:#4d5879;
}
.drawer-close:hover{background:rgba(16,26,61,.1)}

.search{position:relative;margin:0 1px 14px}
.search svg{position:absolute;left:11px;top:50%;transform:translateY(-50%);color:#8D97B5;pointer-events:none}
.search input{
  width:100%;height:38px;border-radius:12px;
  border:1px solid var(--line-strong);
  background:rgba(255,255,255,.62);
  padding:0 32px 0 33px;
  font-family:inherit;font-size:12.5px;color:var(--ink);outline:none;
  transition:border-color .2s,background .2s,box-shadow .2s;
  -webkit-appearance:none;appearance:none;
}
.search input::placeholder{color:#98A2BE}
.search input::-webkit-search-cancel-button{display:none}
.search input:focus{border-color:rgba(42,165,160,.45);background:#fff;box-shadow:0 0 0 3px rgba(42,165,160,.1)}
.search kbd{
  position:absolute;right:8px;top:50%;transform:translateY(-50%);
  font-family:var(--mono);font-size:10px;color:#9AA4C2;
  border:1px solid var(--line-strong);border-radius:5px;padding:0 5px;
  background:rgba(255,255,255,.7);line-height:17px;pointer-events:none;
}

.tree-label{
  display:flex;align-items:center;justify-content:space-between;
  padding:0 7px 7px;font-size:10px;letter-spacing:.14em;color:var(--ink-3);
}
.tree-label .mono{letter-spacing:.04em;color:#98A2BE}

.tree{flex:1;min-height:0;overflow-y:auto;overflow-x:hidden;padding:0 1px 6px;scrollbar-width:thin;scrollbar-color:rgba(16,26,61,.14) transparent}
.tree::-webkit-scrollbar{width:5px}
.tree::-webkit-scrollbar-thumb{background:rgba(16,26,61,.13);border-radius:3px}
.group+.group{margin-top:5px}
.group-head{
  width:100%;display:flex;align-items:center;gap:7px;
  padding:7px 7px;border:0;border-radius:9px;background:transparent;cursor:pointer;
  font-size:12.5px;font-weight:600;color:#222C4E;text-align:left;letter-spacing:.01em;
  transition:background .18s;
}
.group-head:hover{background:rgba(16,26,61,.04)}
.group-head .chev{color:#8D97B5;flex:none;transition:transform .24s}
.group[data-open="false"] .chev{transform:rotate(-90deg)}
.group[data-open="false"] ul{display:none}
.group-head .count{margin-left:auto;font-size:10.5px;color:#9AA4C2;letter-spacing:0}
.group ul{list-style:none;margin:1px 0 0;padding:0}
.doc{
  display:flex;align-items:center;gap:8px;
  padding:6px 8px 6px 11px;border-radius:9px;cursor:pointer;
  transition:background .16s,box-shadow .16s;
}
.doc:hover{background:rgba(255,255,255,.82)}
.doc.active{background:rgba(42,165,160,.09);box-shadow:inset 0 0 0 1px rgba(42,165,160,.18)}
.dot{width:6px;height:6px;flex:none;border-radius:50%;background:var(--jade);box-shadow:0 0 0 3px rgba(42,165,160,.11)}
.dot.warn{background:#E0A458;box-shadow:0 0 0 3px rgba(224,164,88,.15)}
.doc-name{flex:1;min-width:0;font-size:12.5px;color:#2E3858;line-height:1.55;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.doc .pages{font-size:10px;color:#A0A9C2;letter-spacing:-.01em}
.tree-empty{padding:18px 10px;font-size:11.5px;color:#98A2BE;text-align:center}

.rail-foot{margin-top:auto;padding:11px 7px 3px;border-top:1px solid var(--line)}
.foot-line{display:flex;align-items:center;gap:7px;font-size:11px;color:#5A6587}
.foot-line b{font-size:11.5px;color:var(--ink);font-weight:600}
.foot-sub{font-size:9.5px;color:#9AA4C2;margin-top:3px;padding-left:13px;letter-spacing:.01em}
.pulse{position:relative;width:6px;height:6px;border-radius:50%;background:var(--jade);flex:none}
.pulse::after{content:"";position:absolute;inset:-3px;border-radius:50%;border:1px solid rgba(42,165,160,.5);animation:pulse 2.6s ease-out infinite}
@keyframes pulse{0%{transform:scale(.55);opacity:.9}70%{transform:scale(1.65);opacity:0}100%{opacity:0}}

/* ---------- chat ---------- */
.chat{overflow:hidden}
.mobile-top{display:none}
.chat-head{
  display:flex;align-items:center;gap:14px;
  padding:15px 22px 13px;border-bottom:1px solid var(--line);
  background:linear-gradient(180deg,rgba(255,255,255,.34),rgba(255,255,255,0));
}
.chat-title{min-width:0}
.eyebrow{font-size:10px;letter-spacing:.14em;color:var(--ink-3);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.chat-head h1{
  margin:3px 0 0;font-size:16px;font-weight:600;letter-spacing:.01em;line-height:1.4;
  white-space:nowrap;overflow:hidden;text-overflow:ellipsis;
}
.chat-actions{margin-left:auto;display:flex;align-items:center;gap:8px;flex:none}
.sources-badge{
  display:inline-flex;align-items:center;gap:5px;height:28px;padding:0 10px;
  border-radius:9px;border:1px solid rgba(42,165,160,.18);
  background:rgba(42,165,160,.08);color:var(--jade-deep);
  font-size:11px;white-space:nowrap;letter-spacing:.01em;
}
.sources-badge b{font-size:11.5px;font-weight:600}
.sb-label em{font-style:normal}
.sb-label .sb-short{display:none}
.sb-dot{width:5px;height:5px;border-radius:50%;background:var(--jade);flex:none}
.sources-badge.empty{background:rgba(224,164,88,.1);border-color:rgba(224,164,88,.28);color:#8A6423}
.sources-badge.empty .sb-dot{background:#E0A458}
.icon-btn{
  width:28px;height:28px;border-radius:9px;border:1px solid var(--line-strong);
  background:rgba(255,255,255,.6);display:grid;place-items:center;cursor:pointer;color:#4A5578;
  transition:.18s;
}
.icon-btn:hover{background:#fff;color:var(--ink);border-color:rgba(16,26,61,.14);transform:translateY(-1px)}

.thread{
  flex:1;min-height:0;overflow-y:auto;overscroll-behavior:contain;
  padding:20px 22px 10px;
  display:flex;flex-direction:column;gap:18px;
  scrollbar-width:thin;scrollbar-color:rgba(16,26,61,.14) transparent;
}
.thread::-webkit-scrollbar{width:7px}
.thread::-webkit-scrollbar-thumb{background:rgba(16,26,61,.12);border-radius:4px}

.msg{display:flex;gap:10px;align-items:flex-start;animation:msg-in .38s cubic-bezier(.2,.7,.2,1) both}
@keyframes msg-in{from{opacity:0;transform:translateY(7px)}to{opacity:1;transform:none}}
.msg.user{justify-content:flex-end}
.msg-body{min-width:0;max-width:min(84%,680px);display:flex;flex-direction:column}
.user .msg-body{align-items:flex-end;max-width:min(80%,560px)}
.avatar{
  width:28px;height:28px;flex:none;border-radius:9px;display:grid;place-items:center;color:#fff;
  background:linear-gradient(150deg,#2AA5A0,#5FC3C2 60%,#7FD1F7);
  box-shadow:0 8px 16px -10px rgba(42,165,160,.9);
  margin-top:2px;
}
.bubble{
  max-width:100%;
  padding:12px 16px;border-radius:18px;
  font-size:15px;line-height:1.75;color:#1E2848;
  background:rgba(255,255,255,.88);
  border:1px solid rgba(16,26,61,.055);
  box-shadow:0 18px 40px -32px rgba(16,26,61,.4);
  border-bottom-left-radius:7px;
}
.user .bubble{
  background:linear-gradient(158deg,#E9EEFC,#E2EAF9);
  border-color:rgba(16,26,61,.05);
  border-bottom-left-radius:18px;border-bottom-right-radius:7px;
  box-shadow:0 14px 30px -28px rgba(16,26,61,.5);
  color:#1B2546;
}
.bubble p{margin:0 0 9px;text-wrap:balance}
.bubble p:last-child{margin-bottom:0}
.bubble strong{font-weight:600;color:#0E1838}
.bubble ul{margin:9px 0;padding:0;list-style:none;display:grid;gap:7px}
.bubble li{position:relative;padding-left:14px;text-wrap:balance}
.bubble li::before{content:"";position:absolute;left:2px;top:.78em;width:4px;height:4px;border-radius:50%;background:var(--jade);opacity:.85}
.bubble .clause{
  display:inline-block;font-family:var(--mono);font-size:10.5px;color:var(--jade-deep);
  background:rgba(42,165,160,.09);border-radius:5px;padding:0 4px;margin-right:2px;
  transform:translateY(-1px);letter-spacing:-.02em;
}
.cite{
  display:inline-flex;align-items:center;justify-content:center;
  min-width:17px;height:17px;padding:0 4px;margin:0 1px;
  border-radius:5px;border:1px solid rgba(42,165,160,.3);
  background:rgba(42,165,160,.1);color:var(--jade-deep);
  font-family:var(--mono);font-size:10px;font-weight:600;line-height:1;
  vertical-align:baseline;position:relative;top:-3px;
  cursor:pointer;transition:background .16s,color .16s,box-shadow .16s,border-color .16s;
}
.cite:hover{background:var(--jade);border-color:var(--jade);color:#fff}
.cite.on{background:var(--jade);border-color:var(--jade);color:#fff;box-shadow:0 0 0 4px rgba(42,165,160,.14)}

.spec{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:8px;margin:11px 0 12px}
.spec-item{
  padding:9px 10px 10px;border-radius:12px;
  background:linear-gradient(158deg,rgba(127,209,247,.16),rgba(42,165,160,.06));
  border:1px solid rgba(16,26,61,.045);
}
.spec-item span{display:block;font-size:9.5px;letter-spacing:.12em;color:#7C87A8}
.spec-item b{display:block;font-family:var(--mono);font-size:16px;font-weight:600;letter-spacing:-.02em;margin-top:3px;color:#0E1838;line-height:1.4}
.spec-item i{display:block;font-style:normal;font-size:9px;line-height:1.5;color:#98A2BF;margin-top:1px}

.sla{width:100%;border-collapse:collapse;margin:11px 0 12px;font-size:12px}
.sla th{
  text-align:left;font-weight:600;font-size:9.5px;letter-spacing:.1em;color:#7C87A8;
  padding:0 8px 6px;border-bottom:1px solid var(--line-strong);
}
.sla td{padding:7px 8px;border-bottom:1px solid rgba(16,26,61,.045);color:#3A4568;font-size:12px;line-height:1.6}
.sla tr:last-child td{border-bottom:0}
.sla td:first-child{font-weight:600;color:#16203F;white-space:nowrap}
.sla td.mono{font-size:11.5px;color:#26456F;white-space:nowrap}

.callout{
  display:flex;gap:9px;align-items:flex-start;
  margin:10px 0 2px;padding:10px 12px;border-radius:12px;
  background:rgba(224,164,88,.1);border:1px solid rgba(224,164,88,.22);
  font-size:13px;line-height:1.68;color:#6A4C1E;
}
.callout strong{color:#5A3D12}
.callout > span:last-child{text-wrap:balance}
.co-mark{width:4px;align-self:stretch;border-radius:2px;background:#E0A458;flex:none;opacity:.7}

.msg-meta{
  display:flex;align-items:center;flex-wrap:wrap;gap:7px;
  margin:8px 2px 0;font-size:10.5px;color:#8D97B5;letter-spacing:.01em;
  padding-left:2px;
}
.msg-meta .mono{color:#4E597C;font-size:10.5px}
.msg-meta .sep{width:2px;height:2px;border-radius:50%;background:#BCC4D8}
.meta-link{
  border:0;background:none;padding:0;cursor:pointer;
  font-size:10.5px;color:#5E6A8F;text-decoration:underline;text-decoration-color:rgba(94,106,143,.3);
  text-underline-offset:3px;
}
.meta-link:hover{color:var(--jade-deep);text-decoration-color:rgba(42,165,160,.5)}

/* skeleton */
.skeleton{display:flex;gap:10px;align-items:flex-start}
.sk-box{
  width:min(84%,560px);padding:14px 16px;border-radius:18px;border-bottom-left-radius:7px;
  background:rgba(255,255,255,.7);border:1px solid var(--line);
  box-shadow:0 18px 40px -34px rgba(16,26,61,.35);
}
.sk-status{display:flex;align-items:center;gap:7px;font-size:11px;color:#6C7799;margin-bottom:12px;letter-spacing:.02em}
.sk-dots{display:inline-flex;gap:3px;align-items:center}
.sk-dots i{width:3px;height:3px;border-radius:50%;background:var(--jade);animation:blip 1.1s infinite ease-in-out}
.sk-dots i:nth-child(2){animation-delay:.16s}
.sk-dots i:nth-child(3){animation-delay:.32s}
@keyframes blip{0%,80%,100%{opacity:.25;transform:translateY(0)}40%{opacity:1;transform:translateY(-2px)}}
.sk-line{
  height:11px;border-radius:6px;margin-bottom:9px;
  background:linear-gradient(90deg,rgba(16,26,61,.05) 20%,rgba(16,26,61,.1) 40%,rgba(16,26,61,.05) 60%);
  background-size:220% 100%;animation:shimmer 1.5s linear infinite;
}
.sk-line:nth-child(3){width:92%}
.sk-line:nth-child(4){width:76%}
.sk-line:nth-child(5){width:86%;margin-bottom:0}
@keyframes shimmer{0%{background-position:130% 0}100%{background-position:-130% 0}}

/* composer */
.composer{
  padding:9px 22px 14px;
  border-top:1px solid rgba(16,26,61,.05);
  background:linear-gradient(180deg,rgba(255,255,255,0),rgba(255,255,255,.42));
}
.chips{display:flex;gap:7px;flex-wrap:wrap;margin-bottom:9px}
.chip{
  height:29px;padding:0 11px;border-radius:999px;
  border:1px solid var(--line-strong);background:rgba(255,255,255,.72);
  color:#3A4568;font-size:11.5px;line-height:1;cursor:pointer;
  display:inline-flex;align-items:center;gap:6px;white-space:nowrap;
  transition:transform .16s,border-color .16s,background .16s,box-shadow .16s,color .16s;
}
.chip::before{content:"";width:5px;height:5px;border-radius:50%;background:var(--sky);flex:none}
.chip:nth-child(2)::before{background:var(--jade)}
.chip:nth-child(3)::before{background:#101A3D;opacity:.35}
.chip:hover{border-color:rgba(42,165,160,.42);background:#fff;color:#176C68;transform:translateY(-1px);box-shadow:0 10px 20px -18px rgba(16,26,61,.5)}
.input-wrap{
  display:flex;align-items:flex-end;gap:10px;
  padding:9px 9px 9px 14px;border-radius:18px;
  background:rgba(255,255,255,.9);
  border:1px solid rgba(16,26,61,.07);
  box-shadow:0 18px 40px -34px rgba(16,26,61,.55);
  transition:border-color .2s,box-shadow .2s;
}
.input-wrap:focus-within{
  border-color:rgba(42,165,160,.4);
  box-shadow:0 0 0 4px rgba(42,165,160,.08),0 18px 40px -34px rgba(16,26,61,.55);
}
.input-wrap textarea{
  flex:1;min-width:0;border:0;background:none;resize:none;outline:none;
  font-family:inherit;font-size:14px;line-height:1.6;color:var(--ink);
  max-height:118px;padding:6px 0;
}
.input-wrap textarea::placeholder{color:#98A2BE}
.send{
  width:34px;height:34px;flex:none;border:0;border-radius:11px;
  background:var(--ink);color:#fff;display:grid;place-items:center;cursor:pointer;
  transition:background .18s,transform .18s,opacity .18s;
  box-shadow:0 10px 18px -12px rgba(16,26,61,.9);
}
.send:hover:not(:disabled){background:#22305C;transform:translateY(-1px)}
.send:disabled{opacity:.4;cursor:not-allowed;box-shadow:none}
.send.working{background:var(--jade)}
.send.working svg{animation:spin 1s linear infinite}
@keyframes spin{to{transform:rotate(360deg)}}
.hint{display:flex;justify-content:space-between;gap:10px;margin-top:7px;padding:0 4px;font-size:9.5px;color:#9AA4C2;letter-spacing:.02em}
.kbd-hint{white-space:nowrap}

/* ---------- evidence ---------- */
.evidence{overflow:hidden}
.ev-head{
  display:flex;align-items:center;gap:8px;
  padding:17px 16px 13px;border-bottom:1px solid var(--line);
}
.ev-head h2{margin:0;font-size:13px;font-weight:600;letter-spacing:.02em}
.tag{
  margin-left:auto;font-size:9.5px;letter-spacing:.06em;color:var(--jade-deep);
  background:rgba(42,165,160,.09);border:1px solid rgba(42,165,160,.16);
  padding:2px 7px;border-radius:6px;white-space:nowrap;
}
.summary{
  margin:13px 13px 6px;padding:12px 13px;border-radius:14px;
  background:linear-gradient(150deg,rgba(16,26,61,.045),rgba(42,165,160,.075));
  border:1px solid rgba(16,26,61,.05);
}
.summary-line{display:flex;align-items:baseline;gap:5px;font-size:11px;color:#5D6889}
.summary-line b{font-size:17px;font-weight:600;color:var(--ink);letter-spacing:-.02em;line-height:1}
.conf-row{display:flex;align-items:flex-end;justify-content:space-between;margin-top:11px}
.conf-row .label{font-size:10px;letter-spacing:.06em;color:#7D88A8;padding-bottom:2px}
.conf-row .val{font-size:21px;font-weight:600;color:var(--jade-deep);letter-spacing:-.02em;line-height:1.1}
.conf-bar{height:4px;border-radius:2px;background:rgba(16,26,61,.07);margin-top:8px;overflow:hidden}
.conf-bar i{display:block;height:100%;width:0;border-radius:2px;background:linear-gradient(90deg,var(--jade),var(--sky));transition:width .9s cubic-bezier(.2,.8,.2,1)}
.summary-note{margin-top:8px;font-size:9.5px;line-height:1.6;color:#8B95B4}

.ev-list{
  flex:1;min-height:0;overflow-y:auto;overscroll-behavior:contain;
  padding:6px 13px 16px;display:flex;flex-direction:column;gap:9px;
  scrollbar-width:thin;scrollbar-color:rgba(16,26,61,.14) transparent;
  transition:opacity .25s;
}
.ev-list::-webkit-scrollbar{width:5px}
.ev-list::-webkit-scrollbar-thumb{background:rgba(16,26,61,.12);border-radius:3px}
.ev-list.loading{opacity:.42}
.ev-card{
  padding:11px 12px 12px;border-radius:14px;cursor:pointer;
  background:rgba(255,255,255,.72);
  border:1px solid rgba(16,26,61,.05);
  transition:border-color .2s,background .2s,box-shadow .22s,transform .2s;
}
.ev-card:hover{background:#fff;border-color:rgba(42,165,160,.26);transform:translateY(-1px);box-shadow:0 16px 30px -26px rgba(16,26,61,.5)}
.ev-card.hit{border-color:rgba(42,165,160,.5);background:#fff;box-shadow:0 0 0 3px rgba(42,165,160,.11),0 18px 30px -28px rgba(16,26,61,.5)}
.ev-top{display:flex;gap:7px;align-items:flex-start}
.ev-idx{font-size:9px;color:#A0A9C2;padding-top:3px;letter-spacing:.02em;flex:none}
.ev-body{min-width:0;flex:1}
.ev-doc{font-size:11px;font-weight:600;color:#222C4E;line-height:1.5}
.ev-meta{font-size:9.5px;color:#8B95B4;margin-top:2px;line-height:1.5}
.ev-score{font-size:10.5px;font-weight:600;color:var(--jade-deep);padding-top:1px;flex:none}
.bar{height:3px;border-radius:2px;background:rgba(16,26,61,.06);margin:8px 0 8px;overflow:hidden}
.bar i{display:block;height:100%;width:0;border-radius:2px;background:linear-gradient(90deg,var(--jade),var(--sky));transition:width .9s cubic-bezier(.2,.8,.2,1)}
.ev-text{margin:0;font-size:11px;line-height:1.7;color:#4C5779}

.ev-empty{
  padding:26px 16px;text-align:center;border-radius:14px;
  border:1px dashed rgba(16,26,61,.12);background:rgba(255,255,255,.45);
  font-size:11px;line-height:1.7;color:#8B95B4;
}
.ev-empty b{display:block;font-size:12px;color:#5D6889;font-weight:600;margin-bottom:4px}

/* ---------- mobile drawers ---------- */
.scrim{
  display:none;position:fixed;inset:0;z-index:65;
  background:rgba(16,26,61,.26);
  -webkit-backdrop-filter:blur(2px);backdrop-filter:blur(2px);
  opacity:0;pointer-events:none;transition:opacity .32s;
}

@media (max-width:1240px){
  .app{padding:12px;gap:12px;grid-template-columns:238px minmax(0,1fr) 278px}
  .thread{padding:18px 18px 8px}
  .composer{padding:8px 18px 12px}
  .chat-head{padding:13px 18px 11px}
}

@media (max-width:1024px){
  body{overflow:hidden}
  .app{display:block;height:100vh;height:100dvh;padding:0;max-width:none}
  .panel{
    border:0;border-radius:0;box-shadow:none;
    background:transparent;-webkit-backdrop-filter:none;backdrop-filter:none;
  }
  .chat{
    height:100%;width:100%;
    background:rgba(255,255,255,.5);
    -webkit-backdrop-filter:blur(18px);backdrop-filter:blur(18px);
  }
  .mobile-top{
    display:flex;align-items:center;gap:10px;
    padding:10px 14px 9px;border-bottom:1px solid var(--line);
    background:rgba(255,255,255,.45);
  }
  .mt-brand{display:flex;align-items:center;gap:7px;font-size:12.5px;font-weight:600;min-width:0}
  .mt-brand b{white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
  .mt-actions{margin-left:auto;display:flex;gap:6px;flex:none}
  .mt-btn{
    height:28px;padding:0 9px;border-radius:8px;
    border:1px solid var(--line-strong);background:rgba(255,255,255,.8);
    font-size:11px;color:#3A4568;cursor:pointer;
    display:inline-flex;align-items:center;gap:4px;
  }
  .mt-btn svg{color:#8D97B5}
  .mt-btn b{color:var(--jade-deep);font-size:11px}

  .rail,.evidence{
    position:fixed;z-index:70;left:10px;right:10px;top:10px;
    width:auto;max-height:calc(100vh - 20px);max-height:calc(100dvh - 20px);
    background:rgba(251,252,255,.97);
    border:1px solid rgba(16,26,61,.08);
    border-radius:20px;
    box-shadow:0 34px 70px -30px rgba(16,26,61,.48);
    opacity:0;pointer-events:none;transform:translateY(-115%);
    animation:none;
    transition:transform .34s cubic-bezier(.32,.72,0,1),opacity .24s;
  }
  .rail{height:min(640px,calc(100vh - 24px));height:min(640px,calc(100dvh - 24px))}
  .evidence{height:min(700px,calc(100vh - 24px));height:min(700px,calc(100dvh - 24px))}
  body.drawer-rail .rail,body.drawer-evidence .evidence{transform:none;opacity:1;pointer-events:auto}
  .scrim{display:block}
  body.drawer-rail .scrim,body.drawer-evidence .scrim{opacity:1;pointer-events:auto}
  .drawer-close{display:grid}
  .rail{padding:16px 14px 12px}
  .tree{overflow-y:auto}
  .evidence{padding:0}
  .ev-head{padding:16px 16px 12px}
  .ev-list{padding:6px 13px 18px}

  .chat-head{padding:10px 15px 10px;gap:10px}
  .chat-head h1{font-size:14.5px;margin-top:2px}
  .eyebrow{font-size:9.5px;letter-spacing:.1em}
  .thread{padding:14px 13px 6px;gap:15px}
  .bubble{font-size:14.5px;max-width:100%}
  .assistant .msg-body{max-width:calc(100% - 38px)}
  .user .msg-body{max-width:88%}
  .avatar{width:26px;height:26px;border-radius:8px}
  .composer{padding:8px 13px calc(10px + env(safe-area-inset-bottom))}
  .chips{flex-wrap:nowrap;overflow-x:auto;overflow-y:hidden;padding-bottom:2px;scrollbar-width:none;-ms-overflow-style:none}
  .chips::-webkit-scrollbar{display:none}
  .chip{flex:none}
  .kbd-hint{display:none}
  .hint{justify-content:center}
  .spec-item b{font-size:14px}
  .sla td{font-size:11px;padding:6px 6px}
  .sla td.mono{font-size:10.5px}
  .sources-badge{height:26px;padding:0 8px;font-size:10px}
}

@media (max-width:420px){
  .eyebrow{display:none}
  .chat-head h1{font-size:14px;margin-top:0}
  .sb-label .sb-long{display:none}
  .sb-label .sb-short{display:inline}
  .thread{padding:12px 12px 4px}
  .composer{padding:7px 12px calc(9px + env(safe-area-inset-bottom))}
  .bubble{padding:11px 13px;border-radius:16px}
  .bubble li{padding-left:12px}
  .msg-meta{font-size:10px}
  .sources-badge b{font-size:11px}
  .spec{gap:6px}
  .spec-item{padding:8px}
  .spec-item b{font-size:13.5px}
  .spec-item i{font-size:8.5px}
}

@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{animation-duration:.001ms !important;animation-iteration-count:1 !important;transition-duration:.001ms !important;scroll-behavior:auto !important}
}