:root {
  --bg: #fbfbfa;
  --panel: #fff;
  --fg: #1d1c1a;
  --dim: #6b6862;
  --line: #e3e0d9;
  --accent: #2f6f4e;
  --err: #b3261e;
  --err-bg: #fdeeec;
  --warn: #8a5a00;
  --warn-bg: #fdf4e3;
  --ok: #2f6f4e;
  --ok-bg: #ecf4ef;
  --mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, monospace;
  --r: 12px;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #16150f; --panel: #1e1d17; --fg: #eceae3; --dim: #9a968c; --line: #34322b;
    --accent: #7fc4a0; --err: #f2857c; --err-bg: #2e1b19; --warn: #e0b45f;
    --warn-bg: #2c2417; --ok: #7fc4a0; --ok-bg: #18251d;
  }
}

* { box-sizing: border-box; }

/* display 를 지정한 규칙이 hidden 속성을 덮어쓰지 않도록 */
[hidden] { display: none !important; }
body {
  margin: 0;
  padding: 2.5rem 1.25rem 5rem;
  background: var(--bg);
  color: var(--fg);
  font: 18px/1.65 system-ui, -apple-system, "Pretendard", "Apple SD Gothic Neo", sans-serif;
}
main, .top, .foot { max-width: 64rem; margin-inline: auto; }

/* ---- header ---- */
.top {
  display: flex; align-items: baseline; gap: 1rem;
  justify-content: space-between; margin-bottom: 1.75rem;
}
.top h1 { font-size: 2.1rem; margin: 0; letter-spacing: -.02em; }

.lang { display: flex; gap: .25rem; flex: none; }
.lang button {
  font-size: .9rem; padding: .25rem .6rem; border-radius: 999px;
  border: 1px solid var(--line); background: transparent; color: var(--dim); cursor: pointer;
}
.lang button[aria-pressed="true"] { background: var(--fg); color: var(--bg); border-color: var(--fg); }

/* ---- panel / dropzone ---- */
.panel {
  background: var(--panel); border: 1px solid var(--line);
  border-radius: var(--r); padding: 1.4rem; margin-bottom: 1.5rem;
}
.drop {
  border: 2px dashed var(--line); border-radius: var(--r);
  padding: 3rem 1.5rem; text-align: center; cursor: pointer;
  display: flex; flex-direction: column; align-items: center; gap: .4rem;
  transition: border-color .15s, background .15s;
}
.drop:hover, .drop:focus-visible,
body.dragging .drop {
  border-color: var(--accent); background: var(--ok-bg); outline: none;
}
/* 파일을 끌고 오면 어디에 놓아도 받는다는 걸 보여준다 */
body.dragging { outline: 3px solid var(--accent); outline-offset: -3px; }
.drop-icon { font-size: 2.6rem; line-height: 1; }
.drop strong { font-size: 1.25rem; }
.drop-sub { color: var(--dim); font-size: 1rem; }

/* 올라온 PDF 의 첫 장 */
.preview { display: flex; gap: 1.25rem; align-items: flex-start; }
.thumb {
  border: 1px solid var(--line); background: #fff; flex: none;
  box-shadow: 0 1px 3px rgba(0, 0, 0, .12);
}
.pv-meta { display: flex; flex-direction: column; gap: .35rem; align-items: flex-start; min-width: 0; }
.filename { font-size: 1.05rem; overflow-wrap: anywhere; }
.pv-pages { color: var(--dim); font-size: .95rem; }
.pv-meta button { margin-top: .35rem; }

/* 결과가 나오면 업로드 칸 대신 이 줄만 남는다 */
.filebar {
  display: flex; align-items: center; gap: .7rem;
  background: var(--panel); border: 1px solid var(--line);
  border-radius: var(--r); padding: .7rem 1rem; margin-bottom: 1.5rem;
}
.fb-icon { font-size: 1.2rem; }
.fb-name { flex: 1; min-width: 0; font-size: 1.05rem; overflow-wrap: anywhere; }

/* ---- controls ---- */
.actions { display: flex; gap: .75rem; flex-wrap: wrap; align-items: center; margin-top: 1.25rem; }

/* 결과를 다 본 뒤 다음 PDF 로 넘어가는 자리 */
.restart { display: flex; justify-content: center; margin: 6rem 0 3rem; }
.restart button { font-size: 1rem; padding: .6rem 1.4rem; }
button {
  font: inherit; font-size: 1rem; border-radius: 9px; padding: .6rem 1.2rem;
  cursor: pointer; border: 1px solid var(--line); background: var(--panel); color: var(--fg);
  display: inline-flex; align-items: center; gap: .45rem;
}
button:hover:not(:disabled) { border-color: var(--accent); }
button:disabled { opacity: .45; cursor: default; }
button.primary {
  background: var(--accent); border-color: var(--accent); color: var(--bg);
  font-weight: 650; font-size: 1.1rem; padding: .7rem 1.8rem;
}
button.ghost { font-size: .95rem; padding: .45rem .95rem; color: var(--dim); }

.status { margin: 1.1rem 0 0; font-size: 1rem; color: var(--dim); }
/* 진행 표시 — 몇 개 중 몇 개인지가 주, 단계는 부 */
.progress { margin: 1.75rem 0; }
.pg-main {
  display: flex; align-items: baseline; gap: .3rem;
  font-variant-numeric: tabular-nums; line-height: 1.1;
}
#pg-n { font-size: 2.6rem; font-weight: 680; }
.pg-slash, #pg-t { font-size: 1.5rem; color: var(--dim); }
.pg-u { font-size: 1rem; color: var(--dim); margin-left: .35rem; align-self: center; }
.pg-sub { font-size: .95rem; color: var(--dim); margin-top: .2rem; }
.pg-track { height: 4px; background: var(--line); margin-top: .8rem; overflow: hidden; }
#bar { height: 100%; width: 0; background: var(--accent); transition: width .25s; }

/* ---- summary ---- */
.summary { margin-bottom: 1.75rem; }
.sum-total { font-size: 1.15rem; color: var(--dim); margin-bottom: .9rem; }
.sum-total b { font-size: 2.3rem; color: var(--fg); margin-right: .4rem; font-variant-numeric: tabular-nums; }

.group {
  background: var(--panel); border: 1px solid var(--line);
  border-radius: var(--r); padding: 1rem 1.15rem; margin-bottom: .7rem;
}
.group-h { display: flex; align-items: baseline; gap: .5rem; flex-wrap: wrap; }
.g-n { font-size: 1.6rem; font-weight: 680; font-variant-numeric: tabular-nums; }
.g-l { font-size: 1.1rem; font-weight: 600; }
.g-s { font-size: .95rem; color: var(--dim); }

.bar { display: flex; height: 1.9rem; margin: .8rem 0 .7rem; border-radius: 7px; overflow: hidden; gap: 2px; }
.seg {
  display: flex; align-items: center; justify-content: center;
  min-width: 2.4rem; font-size: .92rem; font-weight: 650;
  cursor: pointer; color: #fff; border: none;
}
.seg.match, .seg.found { background: #3f8a63; }
.seg.warn, .seg.likely { background: #b8862b; }
.seg.error, .seg.fail { background: #b3463c; }
.seg.none { background: #8d8981; }
.seg.repo, .seg.web { background: #6f7b8c; }
.seg:hover { filter: brightness(1.12); }

.legend { display: flex; flex-wrap: wrap; gap: .45rem; }
.chip {
  display: inline-flex; align-items: center; gap: .4rem;
  font-size: .95rem; padding: .3rem .7rem; border-radius: 999px;
  border: 1px solid var(--line); background: transparent; color: var(--fg);
}
.chip b { font-variant-numeric: tabular-nums; }
.chip.off { opacity: .42; }
.chip.on { border-color: currentColor; box-shadow: inset 0 0 0 1px currentColor; }
.chip-i { font-weight: 700; }
.chip.match .chip-i, .chip.found .chip-i { color: var(--ok); }
.chip.warn .chip-i, .chip.likely .chip-i { color: var(--warn); }
.chip.error .chip-i, .chip.fail .chip-i { color: var(--err); }
.chip.match.on { color: var(--ok); }
.chip.found.on { color: var(--ok); }
.chip.warn.on, .chip.likely.on { color: var(--warn); }
.chip.error.on, .chip.fail.on { color: var(--err); }

.filter-h { display: flex; align-items: center; gap: .8rem; flex-wrap: wrap; }
.filter-h h2 { margin: 2rem 0 1rem; }
.clear { align-self: center; margin-top: 1rem; }

/* 매칭 근거 지표 */
.metrics { display: flex; flex-wrap: wrap; gap: .45rem; margin-top: .7rem; }
.metric {
  display: inline-flex; align-items: baseline; gap: .4rem;
  padding: .28rem .7rem; border-radius: 8px;
  background: var(--bg); border: 1px solid var(--line); font-size: .92rem;
}
.metric .m-l { color: var(--dim); font-size: .85rem; }
.metric b { font-variant-numeric: tabular-nums; }
.metric small { color: var(--dim); font-size: .8rem; }
.metric.ok b { color: var(--ok); }
.metric.warn b { color: var(--warn); }
.metric.low b { color: var(--err); }

/* ---- results ---- */
.headline { font-size: 1.2rem; margin: 0 0 1.5rem; line-height: 1.5; }
.hl-n { font-size: 1.4rem; font-variant-numeric: tabular-nums; }
.hl-n.error { color: var(--err); }
.hl-n.warn { color: var(--warn); }
.hl-n.none { color: var(--dim); }
.hl-n.found { color: var(--ok); }
.hl-ok { color: var(--ok); }

.results h2, .resolved > summary {
  font-size: 1.25rem; margin: 2.5rem 0 .25rem;
  display: flex; align-items: baseline; gap: .55rem; flex-wrap: wrap;
}
.resolved > summary { cursor: pointer; margin-bottom: 0; }
.h-t { font-weight: 650; }
.h-n {
  font-size: .95rem; font-weight: 650; color: var(--dim);
  border: 1px solid var(--line); border-radius: 3px; padding: 0 .4rem;
  font-variant-numeric: tabular-nums;
}
.h-s { font-size: .95rem; font-weight: 400; color: var(--dim); }

.filter-h { display: flex; align-items: center; gap: 1rem; flex-wrap: wrap; }
.clear { align-self: center; margin-top: 2.5rem; }

/* 참고문헌 목록 — 번호를 거터에 두고 헤어라인으로만 나눈다 */
.reflist { border-bottom: 1px solid var(--line); margin-top: 1.25rem; }
.ref { border-top: 1px solid var(--line); }
.ref > summary {
  display: grid; grid-template-columns: 5rem minmax(0, 1fr);
  gap: 0 1rem; padding: .5rem 0; cursor: pointer; list-style: none;
  align-items: baseline;
}
.ref > summary::-webkit-details-marker { display: none; }
.ref > summary:hover .ref-sum { color: var(--fg); }
.ref[open] > summary { padding-bottom: .3rem; }
.ref[open] > summary .ref-sum { display: none; }
/* 접힌 행은 한 줄을 넘지 않는다 */
.ref-sum {
  color: var(--dim); font-size: .97rem;
  white-space: nowrap; overflow: hidden; text-overflow: ellipsis;
}
/* 손볼 것 없는 행은 뒤로 물러나 있는다 */
.ref.match > summary, .ref.web > summary { opacity: .45; }
.ref.match > summary:hover, .ref.web > summary:hover { opacity: 1; }
.ref-b { margin-left: 6rem; padding-bottom: 1.1rem; }
.ref-n {
  display: inline-flex; align-items: baseline; gap: .4rem;
  font-family: var(--mono); font-size: .98rem; font-variant-numeric: tabular-nums;
  white-space: nowrap;
}

/* 이상 없는 구간의 중략 띠 */
.gap {
  display: flex; align-items: center; gap: .7rem; width: 100%;
  padding: .5rem 0; border: none; border-top: 1px solid var(--line);
  background: transparent; color: var(--dim); font-size: .92rem;
  cursor: pointer; text-align: left; border-radius: 0;
}
.gap:hover { color: var(--fg); background: var(--panel); }
.gap-i { font-family: var(--mono); width: 5rem; flex: none; letter-spacing: .15em; }
.gap-r { font-family: var(--mono); font-variant-numeric: tabular-nums; }
.gap-add {
  color: var(--ok); font-size: .85rem;
  border: 1px solid currentColor; padding: 0 .4rem; margin-left: auto;
}
.ref-n .st { font-weight: 700; }
.st.error, .st.fail, .st.none { color: var(--err); }
.st.warn, .st.likely { color: var(--warn); }
.st.match, .st.found { color: var(--ok); }
.st.repo, .st.web { color: var(--dim); }

/* 손봐야 하는 줄은 바탕으로 짚어 준다.
   빨강 = 틀렸거나 끝내 확인 못 함, 노랑 = 사람이 봐야 함 */
.ref.error, .ref.none, .ref.fail { background: var(--err-bg); }
.ref.warn, .ref.likely { background: var(--warn-bg); }
.ref.error, .ref.none, .ref.fail, .ref.warn, .ref.likely {
  padding-inline: .9rem; margin-inline: -.9rem;
}

.doi { font-family: var(--mono); font-size: .9rem; color: var(--dim); text-decoration: none; overflow-wrap: anywhere; }
.doi:hover { color: var(--accent); text-decoration: underline; }
.src { margin: .35rem 0 .1rem; font-size: .95rem; color: var(--dim); line-height: 1.55; }

/* 필드 비교 */
.fld {
  display: grid; grid-template-columns: 5.5rem minmax(0, 1fr);
  gap: .5rem .9rem; padding: .8rem 0 .2rem; margin-top: .7rem;
  border-top: 1px dashed var(--line);
}
.fld-k { font-size: .92rem; font-weight: 650; }
.fld.error > .fld-k { color: var(--err); }
.fld.warn > .fld-k { color: var(--warn); }
.fld-v { min-width: 0; }

.side { display: grid; grid-template-columns: 2.6rem minmax(0, 1fr); gap: .5rem; padding: .12rem 0; }
.side-k { color: var(--dim); font-size: .78rem; padding-top: .28rem; font-family: var(--mono); }
.side-t { font-size: 1rem; line-height: 1.5; overflow-wrap: anywhere; }
.side-t mark { background: transparent; color: inherit; padding: 0 .1em; border-radius: 2px; }
.side.pdf mark { background: rgba(179, 38, 30, .16); box-shadow: inset 0 -2px 0 rgba(179, 38, 30, .5); }
.side.doi mark { background: rgba(47, 111, 78, .16); box-shadow: inset 0 -2px 0 rgba(47, 111, 78, .5); }
@media (prefers-color-scheme: dark) {
  .side.pdf mark { background: rgba(242, 133, 124, .18); box-shadow: inset 0 -2px 0 rgba(242, 133, 124, .55); }
  .side.doi mark { background: rgba(127, 196, 160, .18); box-shadow: inset 0 -2px 0 rgba(127, 196, 160, .55); }
}
.muted { color: var(--dim); font-style: normal; }
.note { font-size: .9rem; color: var(--dim); margin-top: .3rem; }

.cand-t { font-size: 1rem; line-height: 1.5; }
.cand-s { font-size: .9rem; color: var(--dim); margin-top: .1rem; }
.fld.suggest > .fld-k { color: var(--ok); }

/* 매칭 근거 지표 */
.metrics { display: flex; flex-wrap: wrap; gap: .4rem; margin-top: .6rem; }
.metric {
  display: inline-flex; align-items: baseline; gap: .35rem;
  padding: .18rem .5rem; border: 1px solid var(--line); font-size: .88rem;
}
.metric .m-l { color: var(--dim); font-size: .82rem; }
.metric b { font-variant-numeric: tabular-nums; }
.metric small { color: var(--dim); font-size: .78rem; }
.metric.ok b { color: var(--ok); }
.metric.warn b { color: var(--warn); }
.metric.low b { color: var(--err); }

.bib-btn { margin-top: .7rem; }
.bib { margin-top: .7rem; }
.bib pre {
  background: var(--bg); border: 1px solid var(--line);
  padding: .8rem .85rem; font-family: var(--mono); font-size: .85rem;
  white-space: pre-wrap; overflow-wrap: anywhere; margin: 0 0 .4rem;
}

/* ---- debug ---- */
.debug summary { cursor: pointer; color: var(--dim); font-size: 1rem; }
.dump {
  max-height: 30rem; overflow: auto; background: var(--bg);
  border: 1px solid var(--line); border-radius: 9px; padding: .9rem;
  font-family: var(--mono); font-size: .85rem; white-space: pre-wrap; overflow-wrap: anywhere;
}

.foot { margin-top: 3.5rem; font-size: .92rem; color: var(--dim); }
.foot a { color: inherit; }

@media (max-width: 34rem) {
  body { font-size: 17px; padding: 1.75rem 1rem 4rem; }
  .top h1 { font-size: 1.7rem; }
  .issue { flex-direction: column; gap: .3rem; }
  .issue-f { flex: none; }
}