:root {
  --bg: #0a101e;
  --panel: #111a2c;
  --panel-2: #0d1526;
  --line: rgba(147, 160, 184, 0.28);
  --text: #eaf0fa;
  --muted: #93a0b8;
  --accent: #19b8d4;
  --accent-2: #8b5cf6;
  --good: #4ade80;
  --warn: #fbbf24;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  padding: 0 0 56px;
  background:
    radial-gradient(900px 420px at 78% -8%, rgba(25, 184, 212, 0.16), transparent 62%),
    radial-gradient(760px 380px at 8% 4%, rgba(139, 92, 246, 0.14), transparent 60%),
    var(--bg);
  color: var(--text);
  font: 15px/1.6 -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Microsoft YaHei", sans-serif;
  -webkit-font-smoothing: antialiased;
}

.wrap { width: min(1160px, calc(100% - 40px)); margin: 0 auto; }

/* ---------- header ---------- */
.head { padding: 44px 0 20px; }
h1 { margin: 0 0 10px; font-size: 34px; letter-spacing: -0.5px; }
.grad {
  background: linear-gradient(100deg, var(--accent), var(--accent-2));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.lede { margin: 0 0 18px; max-width: 780px; color: #c4cfe3; }
.lede strong { color: var(--text); }

.status {
  display: inline-block;
  margin: 0;
  padding: 7px 14px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: var(--panel-2);
  color: var(--muted);
  font-size: 13px;
}
.status[data-state="ready"] { color: var(--good); border-color: rgba(74, 222, 128, 0.35); }
.status[data-state="error"] { color: #fca5a5; border-color: rgba(252, 165, 165, 0.4); }

/* ---------- layout ---------- */
.grid {
  display: grid;
  grid-template-columns: minmax(300px, 380px) 1fr;
  gap: 20px;
  align-items: start;
}
@media (max-width: 860px) { .grid { grid-template-columns: 1fr; } }

.panel {
  margin-bottom: 20px;
  padding: 20px;
  border: 1px solid var(--line);
  border-radius: 16px;
  background: linear-gradient(180deg, var(--panel), var(--panel-2));
}
.panel h2 { margin: 0 0 10px; font-size: 17px; }
.hint { margin: 0 0 14px; color: var(--muted); font-size: 13.5px; }
.hint code, footer code { color: #cbb6ff; font-size: 12.5px; }
.pill {
  padding: 2px 9px;
  border-radius: 999px;
  background: rgba(25, 184, 212, 0.16);
  color: var(--accent);
  font-size: 12px;
  font-weight: 600;
}

/* ---------- documents ---------- */
.doclist { margin: 0 0 12px; padding: 0; list-style: none; }
.doclist li {
  display: flex;
  justify-content: space-between;
  gap: 10px;
  padding: 9px 12px;
  margin-bottom: 6px;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: rgba(255, 255, 255, 0.02);
  font-size: 13px;
}
.doclist .n { color: var(--muted); white-space: nowrap; }
.doclist li.is-new { border-color: rgba(74, 222, 128, 0.45); }

.add { border-top: 1px solid var(--line); padding-top: 12px; }
summary { cursor: pointer; color: var(--accent); font-size: 13.5px; }
.add input, .add textarea, .genrow input {
  width: 100%;
  margin: 10px 0 0;
  padding: 9px 11px;
  border: 1px solid var(--line);
  border-radius: 9px;
  background: #0a1220;
  color: var(--text);
  font: inherit;
  font-size: 13.5px;
}
.add textarea { resize: vertical; font-size: 13px; }

/* ---------- asking ---------- */
.ask { display: flex; gap: 10px; }
.ask input {
  flex: 1;
  padding: 12px 14px;
  border: 1px solid var(--line);
  border-radius: 11px;
  background: #0a1220;
  color: var(--text);
  font: inherit;
}
.ask input:focus, .add input:focus, .add textarea:focus, .genrow input:focus {
  outline: none;
  border-color: var(--accent);
}
.ask input:disabled { opacity: 0.5; }

.btn {
  padding: 11px 20px;
  border: 0;
  border-radius: 11px;
  background: linear-gradient(100deg, var(--accent), var(--accent-2));
  color: #06121a;
  font: inherit;
  font-weight: 700;
  cursor: pointer;
}
.btn:disabled { opacity: 0.45; cursor: not-allowed; }
.btn.ghost {
  margin-left: 8px;
  background: transparent;
  border: 1px solid var(--line);
  color: var(--muted);
  font-weight: 500;
}
.link {
  border: 0;
  background: none;
  color: var(--accent);
  font: inherit;
  font-size: 13px;
  text-decoration: underline;
  cursor: pointer;
  padding: 0;
}

.examples { display: flex; flex-wrap: wrap; gap: 8px; margin: 12px 0 0; }
.examples button {
  padding: 6px 12px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: transparent;
  color: var(--muted);
  font: inherit;
  font-size: 12.5px;
  cursor: pointer;
}
.examples button:hover { color: var(--text); border-color: var(--accent); }

.notice {
  margin-top: 14px;
  padding: 11px 14px;
  border: 1px solid rgba(251, 191, 36, 0.35);
  border-radius: 11px;
  background: rgba(251, 191, 36, 0.08);
  color: #fcd34d;
  font-size: 13.5px;
}

/* ---------- results ---------- */
.results { margin: 16px 0 0; padding: 0; list-style: none; counter-reset: hit; }
.results li {
  margin-bottom: 12px;
  padding: 14px 16px;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: rgba(255, 255, 255, 0.02);
}
.results li:first-child { border-color: rgba(25, 184, 212, 0.45); }
.src {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
  margin-bottom: 8px;
  font-size: 12.5px;
  color: var(--muted);
}
.src b { color: var(--text); font-size: 13px; }
.score { margin-left: auto; display: flex; align-items: center; gap: 8px; }
.bar { width: 76px; height: 5px; border-radius: 3px; background: rgba(255, 255, 255, 0.1); overflow: hidden; }
.bar i { display: block; height: 100%; background: linear-gradient(90deg, var(--accent), var(--accent-2)); }
.results p { margin: 0; }
mark { padding: 0 2px; border-radius: 3px; background: rgba(25, 184, 212, 0.28); color: #eaf0fa; }

/* ---------- generated answer ---------- */
.answer {
  margin-top: 14px;
  padding: 14px 16px;
  border: 1px solid rgba(139, 92, 246, 0.4);
  border-radius: 12px;
  background: rgba(139, 92, 246, 0.08);
}
.answer h3 { margin: 0 0 8px; font-size: 13px; color: #cbb6ff; text-transform: uppercase; letter-spacing: 0.06em; }
.answer p { margin: 0; white-space: pre-wrap; }

/* ---------- optional panel + footer ---------- */
.optional { margin-bottom: 26px; }
.genrow { display: grid; grid-template-columns: repeat(3, 1fr); gap: 12px; }
@media (max-width: 760px) { .genrow { grid-template-columns: 1fr; } }
.genrow label { font-size: 12.5px; color: var(--muted); }
.genrow label input { margin-top: 6px; }

.foot { color: var(--muted); font-size: 12.5px; }
.foot p { margin: 6px 0; }

.drop-hover { outline: 2px dashed var(--accent); outline-offset: -8px; }