:root{
  --bg:#0b0f16;
  --card:#121826;
  --text:#e8eefc;
  --muted:#a8b3cf;
  --border:#22304a;
  --accent:#5aa2ff;
  --danger:#ff5a72;
}
*{box-sizing:border-box}
body{
  margin:0;
  font-family: ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial, "Apple Color Emoji","Segoe UI Emoji";
  background:var(--bg);
  color:var(--text);
}
a{color:var(--accent); text-decoration:none}
a:hover{text-decoration:underline}
.container{max-width:1100px; margin:0 auto; padding:16px}
.app-header{
  border-bottom:1px solid var(--border);
  background:linear-gradient(180deg, rgba(18,24,38,1) 0%, rgba(11,15,22,1) 100%);
}
.subtitle{margin:6px 0 0; color:var(--muted)}
.top-nav{margin-top:10px; display:flex; gap:12px; flex-wrap:wrap}
.card{
  background:var(--card);
  border:1px solid var(--border);
  border-radius:14px;
  padding:14px;
  margin:14px 0;
  box-shadow: 0 10px 24px rgba(0,0,0,0.18);
}
.grid{
  display:grid;
  grid-template-columns: 1fr;
  gap:14px;
}
@media (min-width: 980px){
  .grid{grid-template-columns: 1fr 1fr;}
}
.row{display:flex; gap:10px; align-items:center; flex-wrap:wrap}
.button{
  background:var(--accent);
  color:#071020;
  border:none;
  border-radius:10px;
  padding:10px 12px;
  cursor:pointer;
  font-weight:700;
}
.button.secondary{
  background:transparent;
  color:var(--text);
  border:1px solid var(--border);
}
.button.danger{background:var(--danger); color:#21040a}
.input{
  width:100%;
  padding:10px 12px;
  border-radius:10px;
  border:1px solid var(--border);
  background:#0c1322;
  color:var(--text);
}
.input.title{font-size:16px; font-weight:800}
.file{position:relative; overflow:hidden}
.file input{position:absolute; left:-9999px}
.status{margin-top:10px; color:var(--muted); min-height:18px}
.muted{color:var(--muted)}
.small{font-size:12px}
.topics{display:flex; flex-wrap:wrap; gap:8px}
.chip{
  border:1px solid var(--border);
  padding:6px 10px;
  border-radius:999px;
  cursor:pointer;
  user-select:none;
}
.chip.active{border-color:var(--accent)}
.list{display:flex; flex-direction:column; gap:8px; max-height:520px; overflow:auto; padding-right:6px}
.item{
  border:1px solid var(--border);
  border-radius:12px;
  padding:10px;
  cursor:pointer;
}
.item:hover{border-color:#2e4266}
.item .title{font-weight:800}
.item .meta{margin-top:6px; display:flex; gap:8px; flex-wrap:wrap}
.badge{
  border:1px solid var(--border);
  padding:2px 8px;
  border-radius:999px;
  color:var(--muted);
  font-size:12px;
}
.viewer.hidden{display:none}
.viewer-head{display:flex; justify-content:space-between; gap:12px; align-items:flex-start; flex-wrap:wrap}
.meta{display:flex; gap:8px; flex-wrap:wrap; margin-top:6px}
.dot{color:var(--muted)}
.messages{margin-top:12px; display:flex; flex-direction:column; gap:10px; max-height:520px; overflow:auto; padding-right:6px}
.msg{
  border:1px solid var(--border);
  border-radius:12px;
  padding:10px;
}
.msg .role{font-weight:800; color:var(--muted); margin-bottom:6px}
.msg pre{
  margin:0;
  white-space:pre-wrap;
  word-break:break-word;
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;
  font-size:13px;
}
.prose h1,.prose h2{margin-top:0}
.footer{margin:22px 0 40px}
.filters{margin-top:8px}
.h3{margin:14px 0 8px; font-size:14px}
.chips{display:flex; flex-wrap:wrap; gap:8px}

.input.select{width:auto; min-width:220px}