:root{
  --muted:#94a3b8; --text:#e2e8f0; --line:rgba(148,163,184,.18);
  --shadow: 0 10px 30px rgba(0,0,0,.35);
}
*{box-sizing:border-box}
html,body{height:100%}
body{
  margin:0;
  background: radial-gradient(1200px 600px at 20% 0%, rgba(56,189,248,.16), transparent 60%),
              radial-gradient(900px 500px at 90% 20%, rgba(34,197,94,.12), transparent 55%),
              #050a16;
  color:var(--text);
  font-family:system-ui,-apple-system,Segoe UI,Roboto,Ubuntu,Cantarell,Noto Sans,sans-serif;
}
.hidden{display:none}
.app{height:100%;display:flex}
.sidebar{
  width:360px;min-width:320px;
  background: linear-gradient(180deg, rgba(11,18,34,.94), rgba(8,12,24,.94));
  border-left:1px solid var(--line);
  display:flex;flex-direction:column;
}
.topbar{padding:16px 14px 10px 14px;display:flex;align-items:center;justify-content:space-between;gap:12px}
.brand{display:flex;align-items:center;gap:12px}
.logo{
  width:40px;height:40px;border-radius:14px;
  background: linear-gradient(135deg, rgba(56,189,248,.8), rgba(34,197,94,.7));
  display:flex;align-items:center;justify-content:center;
  font-weight:800;color:#041018;
}
.brandTitle{font-weight:800}
.brandSub{font-size:12px;color:var(--muted)}
.topActions{display:flex;gap:8px}
.iconBtn{
  border:1px solid var(--line);
  background: rgba(255,255,255,.03);
  color:var(--text);
  padding:10px 12px;border-radius:14px;cursor:pointer;
  font-weight:700;
}
.iconBtn:hover{background: rgba(255,255,255,.06)}

.seg{display:flex;gap:8px;padding:0 14px 10px 14px}
.segBtn{
  flex:1;
  padding:10px 12px;border-radius:14px;
  border:1px solid var(--line);
  background: rgba(255,255,255,.03);
  color:var(--text);cursor:pointer;
}
.segBtn.active{background: rgba(56,189,248,.12);border-color: rgba(56,189,248,.2)}

.search{padding:10px 14px}
.search input{
  width:100%;padding:12px 14px;border-radius:14px;
  border:1px solid var(--line);
  background: rgba(255,255,255,.03);
  color:var(--text);outline:none;
}
.chatList{padding:6px 6px 12px 6px;overflow:auto}
.chatItem{
  display:flex;gap:12px;padding:12px;margin:6px;border-radius:14px;cursor:pointer;
  border:1px solid transparent;
}
.chatItem:hover{background: rgba(255,255,255,.03)}
.chatItem.active{background: rgba(56,189,248,.08);border-color: rgba(56,189,248,.18)}
.chatAvatar{
  width:44px;height:44px;border-radius:16px;
  background: rgba(148,163,184,.12);
  display:flex;align-items:center;justify-content:center;
  font-weight:800;
  flex:0 0 auto;
}
.chatText{min-width:0;flex:1}
.chatRow1{display:flex;justify-content:space-between;gap:10px;align-items:center}
.chatName{font-weight:800;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.chatTime{font-size:12px;color:var(--muted);white-space:nowrap}
.chatPreview{font-size:13px;color:rgba(226,232,240,.78);white-space:nowrap;overflow:hidden;text-overflow:ellipsis;margin-top:4px}
.chip{
  font-size:11px;color:rgba(226,232,240,.7);
  border:1px solid var(--line);
  padding:2px 8px;border-radius:999px;
  background: rgba(255,255,255,.02);
}
.badge{
  min-width:22px;height:22px;padding:0 8px;border-radius:999px;
  background: rgba(34,197,94,.18);
  border:1px solid rgba(34,197,94,.25);
  color:#bbf7d0;font-size:12px;display:inline-flex;align-items:center;justify-content:center;
}
.main{flex:1;display:flex;flex-direction:column;min-width:0}
.chatHeader{
  height:70px;padding:12px 16px;display:flex;align-items:center;justify-content:space-between;
  border-bottom:1px solid var(--line);
  background: linear-gradient(180deg, rgba(8,12,24,.75), rgba(8,12,24,.55));
}
.chatHeaderLeft{display:flex;align-items:center;gap:12px;min-width:0}
.avatar{
  width:44px;height:44px;border-radius:16px;background: rgba(148,163,184,.12);
  display:flex;align-items:center;justify-content:center;font-weight:800;
}
.chatTitle{font-weight:900}
.chatMeta{font-size:12px;color:var(--muted)}
.messages{
  flex:1;overflow:auto;padding:16px 16px 24px 16px;
  background: radial-gradient(900px 600px at 50% 0%, rgba(56,189,248,.06), transparent 55%), rgba(0,0,0,.12);
}
.emptyState{
  opacity:.7;
  border:1px dashed rgba(148,163,184,.25);
  border-radius:16px;
  padding:16px;
}
.msgRow{display:flex;margin:8px 0}
.msgRow.me{justify-content:flex-start}
.bubble{
  max-width:min(720px, 78%);border-radius:18px;padding:10px 12px;border:1px solid var(--line);
  background: rgba(255,255,255,.03);box-shadow: 0 1px 0 rgba(0,0,0,.25);
}
.msgRow.me .bubble{background: rgba(56,189,248,.12);border-color: rgba(56,189,248,.18)}
.msgText{white-space:pre-wrap;word-break:break-word;font-size:14px;line-height:1.4}
.msgMeta{margin-top:6px;font-size:11px;color: rgba(226,232,240,.58);display:flex;gap:8px;justify-content:flex-end}
.composer{
  height:74px;padding:12px 16px;display:flex;gap:12px;align-items:center;
  border-top:1px solid var(--line);
  background: linear-gradient(180deg, rgba(8,12,24,.55), rgba(8,12,24,.75));
}
.composer input{
  flex:1;padding:14px 16px;border-radius:16px;border:1px solid var(--line);
  background: rgba(255,255,255,.03);color:var(--text);outline:none;
}
.sendBtn{
  padding:12px 16px;border-radius:16px;border:1px solid rgba(56,189,248,.25);
  background: rgba(56,189,248,.14);color:var(--text);font-weight:900;cursor:pointer;
}
.sendBtn:hover{background: rgba(56,189,248,.2)}
/* Modal */
.modalBack{position:fixed;inset:0;background: rgba(0,0,0,.55);display:flex;align-items:center;justify-content:center;padding:18px;z-index:50}
.modal{
  width:min(760px, 96vw);background: rgba(11,18,34,.96);
  border:1px solid var(--line);border-radius:22px;box-shadow: var(--shadow);padding:16px;
}
.modalTitle{font-size:18px;font-weight:900}
.modalSub{font-size:12px;color:var(--muted);margin-top:2px}
.tabs{display:flex;gap:8px;padding:6px;flex-wrap:wrap}
.tab{
  padding:10px 12px;border-radius:14px;border:1px solid var(--line);
  background: rgba(255,255,255,.03);color:var(--text);cursor:pointer;
}
.tab.active{background: rgba(56,189,248,.12);border-color: rgba(56,189,248,.2)}
.tabBody{padding:10px 6px 6px 6px}
.tabBody.hidden{display:none}
.label{font-size:12px;color:var(--muted);display:block;margin:10px 0 6px 0}
.input{
  width:100%;padding:12px 14px;border-radius:14px;border:1px solid var(--line);
  background: rgba(255,255,255,.03);color:var(--text);outline:none;
}
.row{display:flex;gap:10px;margin-top:12px;flex-wrap:wrap}
.btn{
  padding:10px 14px;border-radius:14px;border:1px solid rgba(56,189,248,.25);
  background: rgba(56,189,248,.14);color:var(--text);font-weight:900;cursor:pointer;
}
.btn.ghost{border-color: var(--line);background: rgba(255,255,255,.03)}
.apiBox{margin-top:12px;padding:10px 12px;border:1px solid var(--line);border-radius:16px;background: rgba(255,255,255,.02)}
.apiLine{display:flex;gap:8px;font-size:12px;margin:4px 0}
.muted{color:var(--muted)}
.log{margin-top:10px;height:160px;overflow:auto;background: rgba(0,0,0,.25);border:1px solid var(--line);border-radius:16px;padding:10px;font-size:12px}
.grid2{display:grid;grid-template-columns:1fr 1fr;gap:12px}
@media (max-width:720px){.sidebar{display:none}.grid2{grid-template-columns:1fr}}
code{background: rgba(255,255,255,.06);padding:2px 6px;border-radius:10px}


/* Auth UI improvements */
.modalWide{max-width: 980px}
.authGrid{display:grid;grid-template-columns:1.1fr .9fr;gap:14px;margin-top:10px}
.authLeft{padding:4px 6px}
.authRight{padding:4px 6px;display:flex;flex-direction:column;gap:12px}
.tabsWide{padding:6px 0}
.field{margin-bottom:10px}
.hint2{font-size:12px;color:rgba(226,232,240,.65);margin-top:6px}
.note{
  margin-top:10px;
  padding:10px 12px;
  border:1px solid var(--line);
  border-radius:16px;
  background: rgba(255,255,255,.02);
  color: rgba(226,232,240,.72);
  font-size:12px;
}
.authCard{
  border:1px solid var(--line);
  border-radius:18px;
  background: rgba(255,255,255,.02);
  padding:12px;
}
.authCardTitle{font-weight:900;margin-bottom:8px}
.authList{margin:0;padding-right:18px;color:rgba(226,232,240,.75);font-size:13px;line-height:1.6}
.advancedBox{
  border:1px solid var(--line);
  border-radius:18px;
  background: rgba(255,255,255,.02);
  padding:10px 12px;
}
.advancedBox > summary{
  cursor:pointer;
  list-style:none;
  font-weight:900;
}
.advancedBox > summary::-webkit-details-marker{display:none}
.advancedBody{margin-top:10px}
.monoInput{font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace}

@media (max-width: 920px){
  .authGrid{grid-template-columns:1fr}
  .modalWide{max-width: 760px}
}