:root {
  --bg: #0a0e14;
  --side: #0d1219;
  --panel: #111821;
  --border: #1e293b;
  --border-2: #263447;
  --text: #e6edf3;
  --muted: #8b98a5;
  --accent: #22d3ee;
  --accent-dim: rgba(34, 211, 238, 0.12);
  --ok: #34d399;
  --warn: #fbbf24;
  --bad: #f87171;
  --user: #16202c;
  --mono: "JetBrains Mono", "Cascadia Code", Consolas, "Courier New", monospace;
}
* { box-sizing: border-box; }
[hidden] { display: none !important; }
html, body { height: 100%; margin: 0; }
body {
  background: var(--bg); color: var(--text);
  font: 15px/1.6 -apple-system, BlinkMacSystemFont, "Segoe UI", Inter, Roboto, sans-serif;
  background-image: radial-gradient(ellipse at top, rgba(34, 211, 238, 0.06), transparent 60%);
}
button { font: inherit; }
.app { display: flex; height: 100vh; height: 100dvh; }

/* ---------- Sidebar ---------- */
.sidebar { width: 268px; flex: none; background: var(--side); border-right: 1px solid var(--border); display: flex; flex-direction: column; transition: transform .2s ease; }
.logo { display: flex; align-items: center; gap: 10px; padding: 16px 16px 8px; color: var(--accent); }
.logo-name { font-weight: 800; letter-spacing: .12em; font-size: 15px; color: var(--text); }
.logo-name span { color: var(--accent); }
.logo-sub { font-size: 11px; color: var(--muted); letter-spacing: .04em; font-family: var(--mono); }
.btn-new { margin: 8px 12px 6px; display: flex; align-items: center; gap: 8px; padding: 10px 12px; border-radius: 10px; background: var(--accent-dim); border: 1px solid rgba(34,211,238,.25); color: var(--text); cursor: pointer; text-align: left; }
.btn-new:hover { background: rgba(34,211,238,.18); }
.convos { flex: 1; overflow: auto; padding: 4px 8px; }
.convos-label { font-size: 11px; color: var(--muted); text-transform: uppercase; letter-spacing: .08em; padding: 10px 10px 4px; }
.convo { display: flex; align-items: center; gap: 6px; padding: 8px 10px; border-radius: 8px; color: #c9d4de; cursor: pointer; font-size: 14px; }
.convo span { flex: 1; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.convo:hover, .convo.active { background: var(--panel); }
.convo.active { box-shadow: inset 2px 0 0 var(--accent); }
.convo button { opacity: 0; border: 0; background: none; color: var(--muted); cursor: pointer; font-size: 16px; line-height: 1; padding: 0 2px; }
.convo:hover button { opacity: 1; }
.sidebar-bottom { padding: 12px; border-top: 1px solid var(--border); display: grid; gap: 10px; }
.kb-btn { display: flex; align-items: center; gap: 8px; width: 100%; padding: 10px 12px; border-radius: 10px; background: transparent; border: 1px solid var(--border-2); color: var(--text); cursor: pointer; text-align: left; }
.kb-btn:hover { background: var(--panel); }
.kb-btn span { flex: 1; }
.kb-btn b { font-family: var(--mono); font-size: 12px; background: var(--panel); border: 1px solid var(--border-2); border-radius: 999px; padding: 1px 8px; color: var(--accent); }
.status { display: flex; align-items: center; gap: 8px; font-size: 12px; color: var(--muted); font-family: var(--mono); padding: 0 4px; }
.dot { width: 8px; height: 8px; border-radius: 50%; background: var(--muted); flex: none; }
.dot.ok { background: var(--ok); box-shadow: 0 0 8px var(--ok); }
.dot.warn { background: var(--warn); box-shadow: 0 0 8px var(--warn); }
.dot.bad { background: var(--bad); box-shadow: 0 0 8px var(--bad); }

/* ---------- Main ---------- */
.main { flex: 1; display: flex; flex-direction: column; min-width: 0; }
.topbar { display: flex; align-items: center; gap: 12px; padding: 10px 18px; border-bottom: 1px solid var(--border); background: rgba(10,14,20,.7); backdrop-filter: blur(6px); }
.topbar-title { font-weight: 600; flex: 1; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.icon-btn { display: none; background: none; border: 0; color: var(--text); cursor: pointer; padding: 4px; }
.icon-btn.show { display: block; }
.pill { font-size: 12px; padding: 3px 10px; border-radius: 999px; border: 1px solid var(--border-2); color: var(--muted); white-space: nowrap; font-family: var(--mono); }
.pill.ok { color: var(--ok); border-color: rgba(52,211,153,.35); }
.pill.warn { color: var(--warn); border-color: rgba(251,191,36,.35); }
.pill.bad { color: var(--bad); border-color: rgba(248,113,113,.35); }
.toggle { display: flex; align-items: center; gap: 8px; cursor: pointer; font-size: 13px; color: var(--muted); user-select: none; }
.toggle input { display: none; }
.toggle .track { width: 34px; height: 18px; border-radius: 999px; background: #2a3646; position: relative; transition: background .15s; }
.toggle .track::after { content: ""; position: absolute; top: 2px; left: 2px; width: 14px; height: 14px; border-radius: 50%; background: #fff; transition: transform .15s; }
.toggle input:checked + .track { background: var(--accent); }
.toggle input:checked + .track::after { transform: translateX(16px); }

.chat { flex: 1; overflow: auto; }
.empty { max-width: 780px; margin: 0 auto; padding: 64px 20px 20px; text-align: center; }
.mark.big { color: var(--accent); filter: drop-shadow(0 0 14px rgba(34,211,238,.35)); margin-bottom: 14px; }
.empty h1 { font-size: 30px; font-weight: 700; margin: 0 0 6px; letter-spacing: .04em; }
.empty p { color: var(--muted); margin: 0 0 28px; }
.chips { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; text-align: left; }
.chip { padding: 12px 14px; border: 1px solid var(--border-2); border-radius: 12px; background: var(--panel); color: #d5dee7; font-size: 14px; cursor: pointer; text-align: left; white-space: pre-line; }
.chip:hover { border-color: rgba(34,211,238,.5); }

.messages { max-width: 780px; margin: 0 auto; padding: 24px 20px 40px; display: flex; flex-direction: column; gap: 24px; }
.msg { display: flex; gap: 14px; }
.msg.user { justify-content: flex-end; }
.msg.user .bubble { background: var(--user); border: 1px solid var(--border); padding: 10px 16px; border-radius: 16px; max-width: 78%; white-space: pre-wrap; overflow-wrap: anywhere; }
.avatar { width: 30px; height: 30px; border-radius: 8px; flex: none; display: grid; place-items: center; color: var(--accent); border: 1px solid rgba(34,211,238,.35); background: var(--accent-dim); }
.content { min-width: 0; flex: 1; overflow-wrap: anywhere; }
.content p { margin: 0 0 10px; }
.content p:last-child { margin-bottom: 0; }
.content ul, .content ol { margin: 6px 0 10px; padding-left: 22px; }
.content li { margin: 3px 0; }
.content h2, .content h3, .content h4 { margin: 14px 0 6px; font-size: 15px; letter-spacing: .02em; color: var(--accent); text-transform: uppercase; font-weight: 700; }
.content code { background: #0b1017; border: 1px solid var(--border); padding: 1px 6px; border-radius: 5px; font-size: 13px; font-family: var(--mono); }
.content pre { background: #0b1017; border: 1px solid var(--border); padding: 12px; border-radius: 10px; overflow: auto; font-size: 13px; }
.content pre code { background: none; border: 0; padding: 0; }
.content a { color: var(--accent); }
.content .cite { color: var(--accent); font-family: var(--mono); font-size: 12px; }
.content .table-wrap { overflow-x: auto; }
.content table { border-collapse: collapse; margin: 8px 0; font-size: 14px; }
.content th, .content td { border: 1px solid var(--border-2); padding: 6px 10px; text-align: left; }
.content th { background: var(--panel); }
.content.streaming > :last-child::after { content: "▍"; color: var(--accent); animation: blink 1s steps(1) infinite; }
@keyframes blink { 50% { opacity: 0; } }

.sources { margin-top: 12px; border-top: 1px dashed var(--border-2); padding-top: 8px; font-size: 12px; color: var(--muted); }
.sources-head { display: flex; align-items: center; gap: 8px; margin-bottom: 6px; font-family: var(--mono); letter-spacing: .04em; }
.sources-head .mode { color: var(--accent); }
.src-list { display: flex; flex-wrap: wrap; gap: 6px; }
.src { border: 1px solid var(--border-2); background: var(--panel); border-radius: 999px; padding: 3px 10px; color: #cfd8e3; cursor: pointer; display: inline-flex; gap: 6px; align-items: center; }
.src:hover, .src.open { border-color: rgba(34,211,238,.5); }
.src b { color: var(--accent); font-family: var(--mono); }
.src small { color: var(--muted); font-family: var(--mono); }
.src-text { margin-top: 8px; background: #0b1017; border: 1px solid var(--border); border-radius: 8px; padding: 10px 12px; white-space: pre-wrap; color: #b9c4cf; font-size: 13px; max-height: 260px; overflow: auto; }
.meta { margin-top: 6px; font-size: 11px; color: #5b6b7a; font-family: var(--mono); }
.error { color: #fecaca; background: rgba(248,113,113,.1); border: 1px solid rgba(248,113,113,.35); border-radius: 10px; padding: 10px 12px; font-size: 14px; }
.error code { font-family: var(--mono); }
.typing { display: inline-flex; gap: 4px; padding: 8px 0; }
.typing i { width: 7px; height: 7px; border-radius: 50%; background: var(--accent); animation: bounce 1.2s infinite; }
.typing i:nth-child(2) { animation-delay: .2s; }
.typing i:nth-child(3) { animation-delay: .4s; }
@keyframes bounce { 0%, 80%, 100% { opacity: .2; transform: translateY(0); } 40% { opacity: 1; transform: translateY(-3px); } }

.composer-wrap { padding: 10px 20px 14px; }
.composer { max-width: 780px; margin: 0 auto; display: flex; align-items: flex-end; gap: 8px; background: var(--panel); border: 1px solid var(--border-2); border-radius: 18px; padding: 8px 8px 8px 18px; }
.composer:focus-within { border-color: rgba(34,211,238,.6); box-shadow: 0 0 0 3px rgba(34,211,238,.08); }
.composer textarea { flex: 1; background: none; border: 0; outline: 0; color: var(--text); font: inherit; resize: none; max-height: 200px; padding: 6px 0; line-height: 1.5; }
.send { width: 36px; height: 36px; border-radius: 10px; border: 0; flex: none; background: var(--accent); color: #04141a; cursor: pointer; display: grid; place-items: center; }
.send:disabled { background: #22303f; color: #6b7a89; cursor: default; }
.send.stop { background: #f87171; color: #1a0606; }
.disclaimer { text-align: center; font-size: 12px; color: #5b6b7a; margin: 10px 0 0; }

/* ---------- Knowledge panel ---------- */
.panel { width: 380px; flex: none; background: var(--side); border-left: 1px solid var(--border); display: flex; flex-direction: column; }
.panel[hidden] { display: none; }
.panel-head { display: flex; align-items: center; justify-content: space-between; padding: 14px 16px; border-bottom: 1px solid var(--border); }
.panel-head h2 { margin: 0; font-size: 15px; letter-spacing: .06em; text-transform: uppercase; }
.panel-body { padding: 14px 16px; overflow: auto; flex: 1; display: grid; gap: 12px; align-content: start; }
.drop { border: 1.5px dashed var(--border-2); border-radius: 12px; padding: 22px 14px; text-align: center; cursor: pointer; color: #c9d4de; font-size: 14px; background: var(--panel); }
.drop small { color: var(--muted); }
.drop.over { border-color: var(--accent); background: var(--accent-dim); }
.kb-meta { font-size: 12px; color: var(--muted); font-family: var(--mono); line-height: 1.7; }
.kb-actions { display: flex; gap: 8px; flex-wrap: wrap; }
.kb-actions:empty { display: none; }
.btn { padding: 7px 12px; border-radius: 8px; border: 1px solid var(--border-2); background: var(--panel); color: var(--text); cursor: pointer; font-size: 13px; }
.btn:hover { border-color: rgba(34,211,238,.5); }
.btn:disabled { opacity: .5; cursor: default; }
.doc-list { list-style: none; margin: 0; padding: 0; display: grid; gap: 8px; }
.doc { display: flex; align-items: center; gap: 10px; padding: 10px 12px; border: 1px solid var(--border); border-radius: 10px; background: var(--panel); }
.doc .type { font-family: var(--mono); font-size: 11px; color: var(--accent); border: 1px solid rgba(34,211,238,.35); border-radius: 6px; padding: 1px 6px; text-transform: uppercase; flex: none; }
.doc .info { flex: 1; min-width: 0; }
.doc .name { font-size: 14px; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.doc .sub { font-size: 11px; color: var(--muted); font-family: var(--mono); }
.doc .sub .ok { color: var(--ok); }
.doc .sub .no { color: var(--warn); }
.doc button { border: 0; background: none; color: var(--muted); cursor: pointer; font-size: 16px; }
.doc button:hover { color: var(--bad); }
.setup { font-size: 13px; color: #c9d4de; background: rgba(251,191,36,.08); border: 1px solid rgba(251,191,36,.3); border-radius: 10px; padding: 12px; }
.setup h3 { margin: 0 0 6px; font-size: 13px; color: var(--warn); }
.setup pre { background: #0b1017; border: 1px solid var(--border); border-radius: 8px; padding: 8px 10px; font-size: 12px; overflow: auto; margin: 6px 0; font-family: var(--mono); }
.toast { position: fixed; bottom: 18px; left: 50%; transform: translateX(-50%); background: var(--panel); border: 1px solid var(--border-2); color: var(--text); padding: 10px 16px; border-radius: 10px; font-size: 13px; z-index: 50; box-shadow: 0 10px 30px rgba(0,0,0,.5); }

@media (max-width: 900px) {
  .sidebar { position: fixed; top: 0; bottom: 0; left: 0; z-index: 10; transform: translateX(-100%); }
  .sidebar.open { transform: none; box-shadow: 0 0 0 100vw rgba(0,0,0,.5); }
  .icon-btn { display: block; }
  .chips { grid-template-columns: 1fr; }
  .panel { position: fixed; top: 0; right: 0; bottom: 0; z-index: 20; width: min(380px, 100vw); box-shadow: -10px 0 30px rgba(0,0,0,.5); }
  .toggle-label { display: none; }
  .empty { padding-top: 36px; }
  .empty h1 { font-size: 24px; }
}

.convo button:focus-visible { opacity: 1; }
@media (hover: none) { .convo button { opacity: 1; } }

/* source chips: keep the [n] label on one line and let long titles wrap beside it */
.src { align-items: flex-start; text-align: left; }
.src b { white-space: nowrap; flex: none; }
.src small { overflow-wrap: anywhere; }