/*
  모델: openai/gpt-oss-20b, sentence-transformers/paraphrase-multilingual-MiniLM-L12-v2 (화면 표시용, CSS 자체는 모델 사용 안 함)
  기술: CSS (라이트 테마, 반응형 레이아웃)
  라이브러리: 사용 안 함
*/
:root {
  --bg: #f5f7fa; --surface: #ffffff; --border: #e3e8ef; --text: #1f2933;
  --muted: #64748b; --primary: #2563eb; --primary-dark: #1d4ed8; --primary-soft: #eff4ff;
  --danger: #dc2626; --ok: #15803d; --radius: 10px;
  --shadow: 0 1px 2px rgba(16,24,40,.05), 0 1px 3px rgba(16,24,40,.08);
}
* { box-sizing: border-box; }
body { margin: 0; background: var(--bg); color: var(--text);
  font: 15px/1.6 "Pretendard", "Malgun Gothic", "Apple SD Gothic Neo", system-ui, sans-serif; }
.wrap { max-width: 1200px; margin: 0 auto; padding: 0 16px; }

.model-bar { background: #0f172a; color: #e2e8f0; font-size: 12.5px; padding: 6px 16px;
  display: flex; flex-wrap: wrap; gap: 4px 18px; }
.model-bar b { color: #93c5fd; font-weight: 600; margin-right: 4px; }
.model-bar code { background: rgba(255,255,255,.08); padding: 1px 6px; border-radius: 4px; color: #fff; }
.model-bar small { color: #94a3b8; }

.topbar { background: var(--surface); border-bottom: 1px solid var(--border); }
.topbar-inner { display: flex; align-items: center; gap: 8px; height: 54px; }
.brand { font-weight: 700; color: var(--text); text-decoration: none; font-size: 17px; }
.crumb { color: var(--muted); }

.layout { display: grid; grid-template-columns: 340px 1fr; gap: 20px; padding-top: 20px; padding-bottom: 40px; }
@media (max-width: 860px) { .layout { grid-template-columns: 1fr; } }

.panel { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius);
  box-shadow: var(--shadow); padding: 20px; min-width: 0; }
.side section + section { margin-top: 24px; border-top: 1px solid var(--border); padding-top: 18px; }
h1 { font-size: 20px; margin: 0 0 14px; }
h2 { font-size: 15px; margin: 0 0 10px; }
.hint { color: var(--muted); font-size: 13px; margin: 8px 0 0; }
.row-between { display: flex; align-items: center; justify-content: space-between; gap: 10px; }

.drop { display: flex; flex-direction: column; gap: 10px; }
.drop input[type=file] { border: 1px dashed #b6c2d2; border-radius: 8px; padding: 12px; background: #fafbfd; width: 100%; }

.btn { border: 1px solid transparent; border-radius: 8px; padding: 9px 16px; font: inherit; font-weight: 600; cursor: pointer; }
.btn.primary { background: var(--primary); color: #fff; }
.btn.primary:hover { background: var(--primary-dark); }
.btn.ghost { background: transparent; border-color: var(--border); color: var(--text); }
.btn.ghost:hover { background: var(--bg); }
.btn.sm { padding: 4px 10px; font-size: 13px; }
.btn.danger { background: transparent; color: var(--danger); border-color: #fecaca; }
.btn.danger:hover { background: #fef2f2; }
.btn:disabled { opacity: .55; cursor: progress; }

.doc-list { list-style: none; margin: 0; padding: 0; display: flex; flex-direction: column; gap: 8px; }
.doc-list li { border: 1px solid var(--border); border-radius: 8px; padding: 10px 12px; display: flex; gap: 10px; align-items: center; }
.doc-list li.empty { color: var(--muted); justify-content: center; border-style: dashed; }
.doc-meta { flex: 1; min-width: 0; }
.doc-name { font-weight: 600; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.doc-sub { color: var(--muted); font-size: 12.5px; }

.ask textarea { width: 100%; border: 1px solid var(--border); border-radius: 8px; padding: 12px; font: inherit; resize: vertical; margin-bottom: 10px; }
.ask textarea:focus, select:focus, input:focus { outline: 2px solid #bfdbfe; border-color: var(--primary); }
.topk { color: var(--muted); font-size: 13px; display: flex; align-items: center; gap: 8px; }
.topk select { border: 1px solid var(--border); border-radius: 6px; padding: 4px 8px; font: inherit; }

.status { margin-top: 16px; padding: 10px 14px; border-radius: 8px; background: var(--primary-soft); color: var(--primary-dark); font-size: 14px; }
.status.error { background: #fef2f2; color: var(--danger); }
.status.ok { background: #f0fdf4; color: var(--ok); }

.answer { margin-top: 20px; border-top: 1px solid var(--border); padding-top: 16px; }
.answer-head { display: flex; align-items: center; gap: 10px; }
.answer-head h2 { margin: 0; }
.tag { font-size: 12px; background: var(--primary-soft); color: var(--primary-dark); padding: 2px 8px; border-radius: 999px; }

.markdown { margin-top: 12px; background: #fcfdff; border: 1px solid var(--border); border-radius: var(--radius); padding: 18px 22px; overflow-wrap: anywhere; }
.markdown h1, .markdown h2, .markdown h3 { margin: 1.1em 0 .5em; line-height: 1.35; }
.markdown h1 { font-size: 20px; } .markdown h2 { font-size: 17px; border-bottom: 1px solid var(--border); padding-bottom: 4px; } .markdown h3 { font-size: 15px; }
.markdown > :first-child { margin-top: 0; }
.markdown p { margin: .6em 0; }
.markdown ul, .markdown ol { padding-left: 1.4em; }
.markdown li { margin: .25em 0; }
.markdown strong { color: #0f172a; }
.markdown code { background: #f1f5f9; padding: 1px 5px; border-radius: 4px; font-size: 13px; }
.markdown pre { background: #0f172a; color: #e2e8f0; padding: 12px 14px; border-radius: 8px; overflow-x: auto; }
.markdown pre code { background: none; color: inherit; }
.markdown blockquote { margin: .8em 0; padding: 6px 14px; border-left: 4px solid #93c5fd; background: var(--primary-soft); color: #334155; }
.markdown table { border-collapse: collapse; width: 100%; margin: .8em 0; display: block; overflow-x: auto; }
.markdown th, .markdown td { border: 1px solid var(--border); padding: 7px 10px; text-align: left; }
.markdown th { background: #f1f5f9; }
.markdown a { color: var(--primary); }

.src-title { font-size: 14px; margin: 18px 0 8px; }
.sources { margin: 0; padding-left: 1.4em; display: flex; flex-direction: column; gap: 8px; }
.sources li { font-size: 13.5px; }
.src-head { font-weight: 600; }
.src-score { color: var(--muted); font-weight: 400; margin-left: 6px; }
.src-excerpt { color: var(--muted); margin-top: 2px; }