/* =====================================================================
   PMI Lab — 1a 아카이브 에디토리얼
   시안(03_작업메모 · PMI Lab 1a v2.html)에서 옮김. 값은 토큰으로만 고칠 것.
   ===================================================================== */
:root {
  /* color */
  --paper:        #faf8f3;   /* 기본 배경 */
  --paper-2:      #f3efe3;   /* 보조 면 (푸터·빈 커버) */
  --paper-3:      #eae4d3;   /* 플레이스홀더 */
  --line:         #e4dfd1;   /* 헤어라인 */
  --line-strong:  #cdc6b4;   /* 버튼·태그 테두리 */
  --ink:          #23211c;   /* 제목·주요 버튼 */
  --body:         #5c584d;   /* 본문 */
  --muted:        #7a7263;   /* 라벨·메타 (4.5:1 확보) */
  --accent:       #2f5d43;   /* 유일한 액센트 */
  --accent-tint:  #e3ebdf;   /* 검색 하이라이트 */
  --on-ink:       #faf8f3;
  --overlay:      rgba(24,23,19,.94);

  /* font */
  --font-serif: 'Noto Serif KR', serif;
  --font-sans:  'IBM Plex Sans KR', sans-serif;
  --font-mono:  'IBM Plex Mono', monospace;

  /* font size */
  --fs-display: clamp(30px, 4.6vw, 46px);
  --fs-h2:      clamp(26px, 3.4vw, 34px);
  --fs-h3:      clamp(18px, 2.2vw, 21px);
  --fs-body:    15.5px;
  --fs-cite:    15px;
  --fs-small:   13.5px;
  --fs-label:   11px;

  /* line height */
  --lh-tight: 1.3;
  --lh-cite:  1.8;
  --lh-body:  1.85;

  /* spacing */
  --sp-1: 4px;  --sp-2: 8px;  --sp-3: 12px; --sp-4: 16px;
  --sp-5: 24px; --sp-6: 32px; --sp-7: 48px; --sp-8: 72px;
  --gutter: clamp(20px, 4vw, 44px);
  --maxw:   1200px;
  --measure: 78ch;           /* 서지 텍스트 최대 줄 길이 */

  --tracking-label: .14em;
}

/* ---------- base ---------- */
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body { margin: 0; background: var(--paper); color: var(--ink); font-family: var(--font-sans); font-size: var(--fs-body); line-height: var(--lh-body); overflow-x: hidden; }
img { display: block; max-width: 100%; }
a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; text-underline-offset: 3px; }
h1, h2, h3, p { margin: 0; }
button { font: inherit; color: inherit; background: none; border: 0; padding: 0; cursor: pointer; }

/* ---------- layout ---------- */
.container { max-width: var(--maxw); margin: 0 auto; padding-inline: var(--gutter); }
.section { padding-block: var(--sp-7); }
.section + .section { border-top: 1px solid var(--line); }
.stack { display: flex; flex-direction: column; gap: var(--sp-4); }
.stack--lg { gap: var(--sp-6); }
.split { display: grid; grid-template-columns: repeat(auto-fit, minmax(min(100%, 320px), 1fr)); gap: var(--sp-6) var(--sp-7); }
.grid-auto { display: grid; grid-template-columns: repeat(auto-fill, minmax(min(100%, var(--min, 240px)), 1fr)); gap: var(--gap, var(--sp-5)); }

/* ---------- type ---------- */
.eyebrow { font-family: var(--font-mono); font-size: var(--fs-label); letter-spacing: var(--tracking-label); color: var(--muted); text-transform: uppercase; }
.eyebrow--accent { color: var(--accent); }
.title-display { font-family: var(--font-serif); font-size: var(--fs-display); line-height: var(--lh-tight); font-weight: 500; letter-spacing: -.03em; text-wrap: pretty; }
.title-2 { font-family: var(--font-serif); font-size: var(--fs-h2); line-height: 1.35; font-weight: 500; letter-spacing: -.025em; }
.title-3 { font-family: var(--font-serif); font-size: var(--fs-h3); line-height: 1.45; font-weight: 500; letter-spacing: -.01em; }
.count { color: var(--muted); font-weight: 400; }
.lead { color: var(--body); max-width: 40ch; text-wrap: pretty; }
.meta { font-family: var(--font-mono); font-size: 12px; color: var(--muted); }
.note { font-size: 12.5px; color: var(--muted); line-height: 1.7; }

/* ---------- section head ---------- */
.section-head { display: flex; flex-wrap: wrap; justify-content: space-between; align-items: baseline; gap: var(--sp-3) var(--sp-5); }

/* ---------- nav ---------- */
.site-nav { border-bottom: 1px solid var(--line); }
.site-nav__inner { display: flex; align-items: center; justify-content: space-between; gap: var(--sp-5); min-height: 68px; }
.site-nav__brand { display: flex; align-items: baseline; gap: var(--sp-3); color: var(--ink); }
.site-nav__brand:hover { text-decoration: none; }
.site-nav__name { font-family: var(--font-serif); font-size: 21px; font-weight: 600; letter-spacing: -.02em; }
.site-nav__sub { font-family: var(--font-mono); font-size: 10px; letter-spacing: .12em; color: var(--muted); }
.site-nav__menu { display: flex; flex-wrap: wrap; gap: var(--sp-2) var(--sp-5); list-style: none; margin: 0; padding: 0; font-size: 14px; }
.site-nav__menu a { color: #4a473e; }
.site-nav__menu a.is-active, .site-nav__menu a[aria-current] { color: var(--accent); border-bottom: 1px solid var(--accent); text-decoration: none; }
.site-nav__toggle { display: none; font-family: var(--font-mono); font-size: 12px; letter-spacing: .1em; border: 1px solid var(--line-strong); padding: 8px 12px; }
@media (max-width: 760px) {
  .site-nav__inner { flex-wrap: wrap; }
  .site-nav__toggle { display: block; }
  .site-nav__menu { display: none; width: 100%; flex-direction: column; gap: 0; padding-bottom: var(--sp-3); }
  .site-nav__menu li { border-top: 1px solid var(--line); }
  .site-nav__menu a { display: block; padding: 12px 0; }
  .site-nav.is-open .site-nav__menu { display: flex; }
}

/* ---------- buttons / links ---------- */
.btn-row { display: flex; flex-wrap: wrap; gap: 10px; }
.btn { display: inline-flex; align-items: center; min-height: 44px; padding: 0 20px; font-size: 13.5px; border: 1px solid var(--line-strong); color: var(--ink); }
.btn:hover { text-decoration: none; border-color: var(--ink); }
.btn--primary { background: var(--ink); border-color: var(--ink); color: var(--on-ink); }
.btn--primary:hover { background: var(--accent); border-color: var(--accent); }
.link-arrow { font-family: var(--font-mono); font-size: 12px; color: var(--accent); }
.link-arrow::after { content: " →"; }

/* ---------- tag (News 분류 · 논문 종류) ---------- */
.tag { display: inline-block; font-family: var(--font-mono); font-size: 10px; letter-spacing: .06em; line-height: 1; padding: 5px 7px; border: 1px solid var(--line-strong); color: var(--body); white-space: nowrap; text-transform: uppercase; }
.tag--filled { background: var(--accent); border-color: var(--accent); color: var(--on-ink); }

/* ---------- email (JS가 href 조립) ---------- */
.email { font-family: var(--font-mono); font-size: 12.5px; color: var(--accent); border-bottom: 1px solid var(--accent); padding-bottom: 2px; cursor: pointer; }
.email:hover { text-decoration: none; color: var(--ink); border-color: var(--ink); }

/* ---------- media (비율 고정 이미지) ---------- */
.media { position: relative; overflow: hidden; background: var(--paper-3); aspect-ratio: 4 / 3; }
.media--3x2 { aspect-ratio: 3 / 2; } .media--2x3 { aspect-ratio: 2 / 3; } .media--1x1 { aspect-ratio: 1 / 1; }
.media--4x5 { aspect-ratio: 4 / 5; } .media--16x9 { aspect-ratio: 16 / 9; } .media--3x4 { aspect-ratio: 3 / 4; }
.media > img, .media > video { width: 100%; height: 100%; object-fit: cover; }

/* ---------- row list (연구 주제·과제·소식 공통) ---------- */
.row-list { list-style: none; margin: 0; padding: 0; border-top: 1px solid var(--line); }
.row { display: grid; grid-template-columns: 44px minmax(0, 1fr) auto; gap: var(--sp-2) var(--sp-5); align-items: baseline; padding: 18px 0; border-bottom: 1px solid var(--line); }
.row__num { font-family: var(--font-mono); font-size: 12px; color: var(--accent); }
.row__main { display: flex; flex-direction: column; gap: 6px; min-width: 0; }
.row__title { font-family: var(--font-serif); font-size: var(--fs-h3); font-weight: 500; line-height: 1.45; }
.row__sub { display: flex; flex-wrap: wrap; gap: 2px 18px; font-size: 14px; color: var(--body); }
.row__meta { font-family: var(--font-mono); font-size: 12px; color: var(--muted); white-space: nowrap; }
.row--compact { grid-template-columns: auto minmax(0, 1fr) auto; padding: 14px 0; }
.row--compact .row__title { font-family: var(--font-sans); font-size: 15px; font-weight: 400; }
@media (max-width: 560px) { .row { grid-template-columns: 36px minmax(0, 1fr); } .row__meta { grid-column: 2; } }

/* ---------- tabs / search / year jump ---------- */
.tabs { display: flex; flex-wrap: wrap; border-bottom: 1px solid var(--line); font-size: 14px; }
.tab { padding: 12px 20px 12px 0; margin-right: 4px; color: var(--muted); border-bottom: 2px solid transparent; margin-bottom: -1px; }
.tab:hover { text-decoration: none; color: var(--ink); }
.tab.is-active { color: var(--ink); font-weight: 500; border-color: var(--accent); }
.tab__count { font-family: var(--font-mono); font-size: 11px; margin-left: 4px; }
.tab.is-active .tab__count { color: var(--accent); }
.search { display: flex; align-items: center; gap: 10px; border-bottom: 1px solid var(--ink); min-width: min(100%, 300px); }
.search input { flex: 1; min-width: 0; border: 0; background: transparent; font: inherit; font-size: 14px; padding: 8px 0; color: var(--ink); outline: none; }
.search__icon { font-family: var(--font-mono); color: var(--muted); }
/* 연도 선택 — 논문은 19개 연도라 전부 깔면 줄을 먹는다. 접어 두고 목록 안에서 스크롤 */
.year-pick { position: relative; align-self: flex-start; }
.year-pick__toggle { list-style: none; cursor: pointer; display: inline-flex; align-items: center; gap: 10px;
  min-height: 44px; padding: 0 14px; border: 1px solid var(--line-strong);
  font-family: var(--font-mono); font-size: 12px; letter-spacing: .06em; color: var(--body); }
.year-pick__toggle::-webkit-details-marker { display: none; }
.year-pick__toggle::after { content: "▾"; color: var(--muted); }
.year-pick[open] .year-pick__toggle { border-color: var(--ink); color: var(--ink); }
.year-pick[open] .year-pick__toggle::after { content: "▴"; }
.year-pick__panel { position: absolute; left: 0; z-index: 20; min-width: 170px;
  max-height: 300px; overflow-y: auto; background: var(--paper);
  border: 1px solid var(--ink); display: flex; flex-direction: column; }
.year-pick__panel a { display: flex; justify-content: space-between; gap: 18px; padding: 11px 14px;
  font-family: var(--font-mono); font-size: 12.5px; color: var(--body); }
.year-pick__panel a + a { border-top: 1px solid var(--line); }
.year-pick__panel a:hover { background: var(--paper-2); color: var(--ink); text-decoration: none; }
.year-pick__panel a span { color: var(--muted); }

/* ---------- citation list (논문·특허·Projects 공통) ---------- */
.year-block { display: grid; grid-template-columns: minmax(0, 110px) minmax(0, 1fr); gap: 0 var(--sp-6); border-top: 1px solid var(--ink); }
.year-block__year { font-family: var(--font-serif); font-size: 26px; font-weight: 500; letter-spacing: -.02em; padding-top: 18px; position: sticky; top: 0; align-self: start; }
.year-block__year small { display: block; font-family: var(--font-mono); font-size: 11px; font-weight: 400; color: var(--muted); letter-spacing: 0; margin-top: 2px; }
.cite-list { list-style: none; margin: 0; padding: 0; }
.cite { display: grid; grid-template-columns: minmax(0, var(--measure)) 1fr; gap: 6px var(--sp-4); padding: 20px 0; border-bottom: 1px solid var(--line); }
.cite:last-child { border-bottom: 0; }
.cite__text { font-size: var(--fs-cite); line-height: var(--lh-cite); color: var(--ink); overflow-wrap: anywhere; word-break: keep-all; text-wrap: pretty; }
.cite__text mark { background: var(--accent-tint); color: inherit; padding: 0 1px; }
.cite__meta { display: flex; flex-direction: column; align-items: flex-end; gap: 8px; padding-top: 2px; }
.pdf-link { font-family: var(--font-mono); font-size: 11px; letter-spacing: .06em; color: var(--accent); border: 1px solid var(--accent); padding: 4px 8px; line-height: 1; white-space: nowrap; }
.pdf-link:hover { background: var(--accent); color: var(--on-ink); text-decoration: none; }
@media (max-width: 760px) {
  .year-block { grid-template-columns: 1fr; }
  .year-block__year { position: static; display: flex; align-items: baseline; gap: 10px; padding-block: 16px 4px; }
  .year-block__year small { display: inline; }
  .cite { grid-template-columns: minmax(0, 1fr); }
  .cite__meta { flex-direction: row; align-items: center; justify-content: flex-start; }
}

/* ---------- photo grid (갤러리 상세·연구 상세·수상·Resources 공통) ---------- */
.photo-grid { columns: 3 260px; column-gap: 12px; }
.photo-grid > * { break-inside: avoid; margin-bottom: 12px; display: block; }
.photo-grid--single { columns: 1; max-width: 820px; }
.photo-grid--pair { columns: 2 240px; max-width: 980px; }
.photo-grid a { cursor: zoom-in; }
.photo-grid a:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }

/* ---------- event card (갤러리 목록) ---------- */
.event-card { display: flex; flex-direction: column; gap: 12px; color: var(--ink); }
.event-card:hover { text-decoration: none; }
.event-card:hover .event-card__title { text-decoration: underline; text-underline-offset: 3px; }
.event-card__cover { position: relative; aspect-ratio: 4 / 3; overflow: hidden; background: var(--paper-3); }
.event-card__cover img { width: 100%; height: 100%; object-fit: cover; }
.event-card__count { position: absolute; right: 8px; bottom: 8px; font-family: var(--font-mono); font-size: 10.5px; background: var(--paper); color: var(--ink); padding: 3px 7px; }
.event-card__cover--empty { background: var(--paper-2); border: 1px solid var(--line); display: flex; flex-direction: column; justify-content: space-between; padding: 16px; }
.event-card__cover--empty .big { font-family: var(--font-serif); font-size: 40px; line-height: 1; color: var(--line-strong); letter-spacing: -.03em; }
.event-card__title { font-family: var(--font-serif); font-size: 17px; font-weight: 500; line-height: 1.5; }
.meta-line { display: flex; flex-wrap: wrap; gap: 2px 12px; font-family: var(--font-mono); font-size: 11.5px; color: var(--muted); }
.year-divider { display: flex; align-items: baseline; gap: 12px; border-top: 1px solid var(--ink); padding-top: 14px; }
.year-divider b { font-family: var(--font-serif); font-size: 24px; font-weight: 500; }

/* ---------- event detail ---------- */
.event-head { display: grid; grid-template-columns: repeat(auto-fit, minmax(min(100%, 300px), 1fr)); gap: var(--sp-4) var(--sp-7); align-items: end; padding-bottom: var(--sp-5); border-bottom: 1px solid var(--line); }
.facts { display: grid; grid-template-columns: auto 1fr; gap: 6px 20px; font-size: 14px; margin: 0; }
.facts dt { font-family: var(--font-mono); font-size: 11px; letter-spacing: .1em; color: var(--muted); padding-top: 3px; }
.facts dd { margin: 0; color: var(--body); }
.pager { display: grid; grid-template-columns: 1fr 1fr; border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.pager a { padding: 18px 0; color: var(--ink); display: flex; flex-direction: column; gap: 4px; }
.pager a + a { text-align: right; border-left: 1px solid var(--line); }
.pager span { font-family: var(--font-mono); font-size: 11px; color: var(--muted); }

/* ---------- people ---------- */
.pi { display: grid; grid-template-columns: minmax(0, 300px) minmax(0, 1fr); gap: var(--sp-6) var(--sp-7); }
.pi__photo img { object-position: 50% 25%; }
.pi__bio { font-size: 15px; line-height: 1.85; color: var(--body); max-width: 68ch; display: flex; flex-direction: column; gap: 14px; }
@media (max-width: 760px) { .pi { grid-template-columns: 1fr; } .pi__photo { max-width: 260px; } }
.group-head { display: flex; align-items: baseline; gap: 10px; border-top: 1px solid var(--ink); padding-top: 14px; }
.person-card { display: flex; flex-direction: column; gap: 6px; min-width: 0; }
.person-card .media { margin-bottom: 8px; }
.person-card .media img { object-position: 50% 22%; }  /* 얼굴 잘림 방지: 상단 기준 크롭 */
.person-card__role { font-family: var(--font-mono); font-size: 10.5px; letter-spacing: .1em; color: var(--accent); text-transform: uppercase; }
.person-card__name { font-family: var(--font-serif); font-size: 18px; font-weight: 500; }
.person-card__title { font-size: 13px; color: var(--body); line-height: 1.6; }
.person-card__interest { font-size: 12.5px; color: var(--muted); line-height: 1.6; }
.person-card .email { align-self: flex-start; font-size: 11.5px; margin-top: 4px; }
.alumni-list { list-style: none; margin: 0; padding: 0; border-top: 1px solid var(--line); }
.alumni-row { display: grid; grid-template-columns: 44px minmax(0, 1.1fr) minmax(0, .7fr) minmax(0, 1.4fr); gap: var(--sp-4); align-items: center; padding: 10px 0; border-bottom: 1px solid var(--line); font-size: 14.5px; }
.alumni-row .media { width: 44px; }
.alumni-row .media img { object-position: 50% 22%; }
.alumni-row__role { font-size: 13px; color: var(--body); }
.alumni-row__career { font-size: 13.5px; color: var(--body); }
.alumni-row__career:empty::before { content: "—"; color: var(--line-strong); }
@media (max-width: 560px) { .alumni-row { grid-template-columns: 44px minmax(0, 1fr); } .alumni-row__role, .alumni-row__career { grid-column: 2; } }

/* ---------- lightbox ---------- */
.lightbox { position: fixed; inset: 0; background: var(--overlay); display: none; z-index: 100; padding: 56px var(--gutter) 72px; }
.lightbox.is-open { display: flex; align-items: center; justify-content: center; }
.lightbox__stage { max-width: min(1100px, 100%); max-height: 100%; width: 100%; display: flex; justify-content: center; }
.lightbox__stage > * { max-height: calc(100vh - 140px); width: auto; max-width: 100%; }
.lightbox__stage .media { width: min(100%, 900px); height: auto; }
.lightbox__bar { position: absolute; left: 0; right: 0; bottom: 0; display: flex; justify-content: space-between; align-items: center; padding: 18px var(--gutter); color: var(--on-ink); font-family: var(--font-mono); font-size: 12px; }
.lightbox__btn { color: var(--on-ink); font-family: var(--font-mono); font-size: 12px; min-height: 44px; padding: 0 12px; border: 1px solid rgba(250,248,243,.3); }
.lightbox__close { position: absolute; top: 12px; right: var(--gutter); }

/* ---------- footer ---------- */
.site-footer { background: var(--paper-2); border-top: 1px solid var(--line); }
.site-footer__inner { display: flex; flex-wrap: wrap; gap: var(--sp-3) var(--sp-7); justify-content: space-between; padding-block: var(--sp-6); font-size: 12.5px; color: var(--muted); line-height: 1.8; }
.site-footer__name { font-family: var(--font-serif); font-size: 16px; color: var(--ink); }