:root {
  --fg: #1a1b1f;
  --fg-muted: #43464d;
  --fg-soft: #75869680;
  --bg: #ffffff;
  --bg-soft: #f5f7fa;
  --bg-cream: #fcfbe080;
  --bg-card: #ffffff;
  --border: #e4ebf3;
  --accent: #4b5563;          /* default: charcoal gray */
  --accent-soft: #eef0f3;     /* matching pale gray */
  --tag-bg: #eef2f7;
  --tag-fg: #1a1b1f;
  --maxw: 1080px;
  --radius: 16px;
  --radius-sm: 8px;
  --shadow: 0 1px 2px rgba(0,0,0,0.05), 0 4px 12px rgba(0,0,0,0.04);
  --font: "Montserrat", -apple-system, BlinkMacSystemFont, "Segoe UI", "Apple SD Gothic Neo", "Noto Sans KR", "NanumBarunGothic", sans-serif;
}

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
/* Sticky header is ~64px tall — add scroll-margin so anchor targets aren't hidden behind it. */
section[id], h2[id], h3[id], div[id^="proj"] { scroll-margin-top: 80px; }

/* Language toggle (top-right of nav) */
.lang-toggle {
  display: inline-flex;
  background: var(--bg-soft);
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 3px;
  margin-left: 12px;
  gap: 2px;
}
.lang-toggle button {
  background: transparent;
  border: 0;
  padding: 4px 10px;
  font: inherit;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.4px;
  color: var(--fg-muted);
  cursor: pointer;
  border-radius: 999px;
  font-family: inherit;
}
.lang-toggle button:hover { color: var(--fg); }
.lang-toggle button.active {
  background: var(--accent);
  color: white;
}
.lang-toggle button.active:hover { color: white; }

/* Show/hide per language. Default KR. */
html.lang-ko .en-only { display: none; }
html.lang-en .ko-only { display: none; }
body {
  font-family: var(--font);
  color: var(--fg);
  background: var(--bg);
  line-height: 1.6;
  font-size: 15px;
  -webkit-font-smoothing: antialiased;
}
/* Korean wraps between words (not inside them); avoid one-word last lines */
body { word-break: keep-all; overflow-wrap: break-word; text-wrap: pretty; }
h1, h2, h3, .paper-card-title, .paper-mini-title { text-wrap: balance; }
a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }
img { max-width: 100%; height: auto; display: block; }

/* ----- Layout ----- */
.container { max-width: var(--maxw); margin: 0 auto; padding: 0 24px; }
header.site-header {
  position: sticky; top: 0; z-index: 50;
  background: rgba(255,255,255,0.92);
  backdrop-filter: saturate(180%) blur(8px);
  border-bottom: 1px solid var(--border);
}
.site-header .inner {
  max-width: var(--maxw); margin: 0 auto;
  display: flex; align-items: center; justify-content: space-between;
  padding: 12px 24px;
}
.brand {
  font-weight: 700; font-size: 18px;
  letter-spacing: 0.2px; color: var(--fg);
}
.brand:hover { text-decoration: none; }
nav.primary { display: flex; gap: 4px; flex-wrap: wrap; }
nav.primary a {
  padding: 6px 12px; border-radius: 6px;
  color: var(--fg-muted); font-weight: 500; font-size: 14px;
}
nav.primary a:hover { background: var(--bg-soft); text-decoration: none; color: var(--fg); }
nav.primary a.active { color: var(--accent); background: var(--accent-soft); }

/* ----- Hero ----- */
section.hero { padding: 56px 0 32px; }
.hero-grid {
  display: grid; gap: 32px; align-items: center;
  grid-template-columns: 1fr 220px;
}
.hero h1 { font-size: 34px; margin: 0 0 6px; font-weight: 700; }
.hero .subtitle { color: var(--fg-muted); margin: 0 0 16px; font-size: 16px; }
.hero .lead { color: var(--fg); font-weight: 600; margin: 0 0 12px; font-size: 18px; line-height: 1.5; max-width: 620px; }

/* Selected Projects (home) */
.sp-grid { display: grid; grid-template-columns: 1fr 1fr 1fr; gap: 13px; }
.sp-card { border: 1px solid var(--border); border-radius: var(--radius); background: var(--bg-card); display: flex; align-items: center; gap: 14px; padding: 14px 16px; color: inherit; }
a.sp-card:hover { border-color: var(--accent); transform: translateY(-2px); transition: 120ms; text-decoration: none; }
.sp-info { flex: 1; min-width: 0; }
.sp-name { font-weight: 700; font-size: 14px; color: var(--fg); }
.sp-arrow { margin-left: 6px; color: var(--fg-muted); font-weight: 700; display: inline-block; transition: transform 0.14s ease, color 0.14s ease; }
a.sp-card:hover .sp-name { color: var(--accent); }
a.sp-card:hover .sp-arrow { transform: translateX(4px); color: var(--accent); }
.sp-period { color: var(--fg-muted); font-size: 11.5px; margin-top: 2px; }
.sp-chips { margin-top: 9px; display: flex; flex-wrap: wrap; gap: 5px; }
.sp-chip { font-size: 10.5px; font-weight: 600; color: var(--tag-fg); background: var(--tag-bg); border: 1px solid var(--border); border-radius: 999px; padding: 2px 9px; }
.sp-dn-wrap { flex: none; text-align: center; }
.sp-dn-lbl { font-size: 9.5px; font-weight: 700; letter-spacing: 0.04em; color: var(--fg-muted); margin-bottom: 4px; }
.sp-dn { position: relative; width: 52px; height: 52px; border-radius: 50%; margin: 0 auto;
  background: conic-gradient(var(--accent) calc(var(--p) * 3.6deg), var(--border) 0); }
.sp-dn::after { content: ''; position: absolute; inset: 5px; background: var(--bg-card); border-radius: 50%; }
.sp-dn .pct { position: absolute; inset: 0; display: grid; place-items: center; font-size: 11px; font-weight: 700; color: var(--fg); z-index: 1; }
@media (max-width: 680px) { .sp-grid { grid-template-columns: 1fr; } }
.hero ul.bullets { margin: 0; padding: 0 0 0 18px; color: var(--fg-muted); }
.hero ul.bullets li { margin: 4px 0; }
.hero .avatar {
  width: 200px; height: 200px; border-radius: 50%;
  background: var(--bg-soft); object-fit: cover;
  border: 1px solid var(--border);
}
.social-row { display: flex; gap: 8px; margin-top: 18px; flex-wrap: wrap; }
.social-row a {
  display: inline-flex; flex-direction: column;
  align-items: center; justify-content: center;
  gap: 4px;
  min-width: 60px;
  padding: 8px 6px;
  border-radius: 10px;
  background: var(--bg-soft); border: 1px solid var(--border);
  color: var(--fg);
  text-decoration: none;
  transition: background 120ms, border-color 120ms, transform 120ms;
}
.social-row a:hover {
  background: var(--accent-soft); border-color: var(--accent);
  text-decoration: none; transform: translateY(-1px);
}
.social-row svg { width: 20px; height: 20px; flex-shrink: 0; }
.social-row .social-label {
  font-size: 10px; font-weight: 600; color: var(--fg-muted);
  letter-spacing: 0.2px;
}
.social-row a:hover .social-label { color: var(--accent); }
.social-groups { display: flex; gap: 28px; flex-wrap: wrap; align-items: flex-start; margin-top: 18px; }
.social-grp .social-row { margin-top: 0; }
.grp-lbl { font-size: 10px; font-weight: 800; letter-spacing: 0.1em; color: var(--fg-muted); margin-bottom: 7px; }

/* Floating documents rail (home) — quick access that follows on scroll */
.doc-rail {
  position: fixed; right: 18px; top: 50%;
  transform: translateY(-50%) translateX(14px);
  z-index: 40;
  display: flex; flex-direction: column; gap: 8px;
  padding: 8px;
  background: rgba(255,255,255,0.86);
  -webkit-backdrop-filter: blur(6px); backdrop-filter: blur(6px);
  border: 1px solid var(--border); border-radius: 14px;
  box-shadow: 0 6px 22px rgba(26,27,31,0.10);
  opacity: 0; pointer-events: none;
  transition: opacity 200ms ease, transform 200ms ease;
}
.doc-rail.show { opacity: 1; pointer-events: auto; transform: translateY(-50%) translateX(0); }
.doc-rail a {
  display: flex; flex-direction: column; align-items: center; justify-content: center;
  gap: 3px; width: 58px; padding: 8px 4px;
  border-radius: 10px;
  background: var(--bg-soft); border: 1px solid var(--border);
  color: var(--fg); text-decoration: none;
  transition: background 120ms, border-color 120ms, color 120ms;
}
.doc-rail a:hover { background: var(--accent-soft); border-color: var(--accent); color: var(--accent); }
.doc-rail svg { width: 20px; height: 20px; }
.doc-rail .dr-label { font-size: 9.5px; font-weight: 600; color: var(--fg-muted); letter-spacing: 0.2px; }
.doc-rail a:hover .dr-label { color: var(--accent); }
@media (max-width: 860px) { .doc-rail { display: none; } }

/* ----- Section ----- */
section.block { padding: 40px 0; }
section.block + section.block { border-top: 1px solid var(--border); }
section.block#projects { border-top: 0; } /* no gray divider between Career and Selected Projects */
section.block.tinted { background: var(--bg-soft); border-radius: var(--radius); margin: 8px 24px; padding: 32px; }
section.block.cream { background: var(--bg-cream); border-radius: var(--radius); margin: 8px 24px; padding: 32px; }
section.block h2 {
  margin: 0 0 22px; font-size: 26px; font-weight: 700;
  display: inline-block; padding-bottom: 4px;
  border-bottom: 3px solid var(--accent);
  letter-spacing: -0.3px;
}
section.block .sub-h { margin: 22px 0 12px; font-size: 15px; color: var(--fg-muted); font-weight: 700; letter-spacing: 0.4px; text-transform: uppercase; }

/* ----- Tab bar (home Publications / Patents / News / Research) ----- */
.tab-bar {
  display: flex;
  gap: 4px;
  border-bottom: 2px solid var(--border);
  margin: 0 0 28px;
  flex-wrap: wrap;
}
.tab-btn {
  background: transparent;
  border: 0;
  padding: 14px 22px;
  font-size: 17px;
  font-weight: 700;
  color: var(--fg-muted);
  cursor: pointer;
  border-bottom: 3px solid transparent;
  margin-bottom: -2px;
  font-family: inherit;
  letter-spacing: -0.2px;
  transition: color 120ms, border-color 120ms, background 120ms;
}
.tab-btn:hover { color: var(--fg); background: var(--bg-soft); }
.tab-btn.active {
  color: var(--accent);
  border-bottom-color: var(--accent);
}
.tab-panel { display: none; }
.tab-panel.active { display: block; }

/* ----- Career cards ----- */
.career-grid {
  display: grid; gap: 16px;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
}
.career-card {
  background: var(--bg-card); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 20px; box-shadow: var(--shadow);
  display: flex; flex-direction: column; gap: 8px;
  color: var(--fg);
}
.career-card:hover { text-decoration: none; border-color: var(--accent); transform: translateY(-2px); transition: 120ms; }
/* Horizontal CI row: mark image on the left, company/school name on the right. */
.career-card .ci-row {
  display: flex;
  align-items: center;
  gap: 14px;
  margin-bottom: 12px;
  min-height: 84px;          /* matches tallest mark variant */
}
.career-card .ci-mark-wrap {
  width: 64px; height: 64px;  /* default (hdc) */
  display: flex; align-items: center; justify-content: center;
  flex-shrink: 0;
}
/* Metaent mark is intrinsically taller (mark stacked on text) — give it a touch more room. */
.career-card.meta .ci-mark-wrap { width: 74px; height: 74px; }
/* School marks (KU shield, BU symbol) are visually dense — keep them a bit smaller. */
.career-card.school .ci-mark-wrap { width: 52px; height: 52px; }
.career-card .ci-mark-wrap img {
  max-width: 100%; max-height: 100%;
  object-fit: contain;
  display: block;
}
.career-card .ci-name {
  font-weight: 700;
  font-size: 16px;
  line-height: 1.3;
  letter-spacing: -0.2px;
  color: var(--fg);
}
.career-card .role { color: var(--fg-muted); font-size: 13px; }
.career-card .period { color: var(--fg-muted); font-size: 12px; margin-top: 4px; }


/* ----- Publication lists ----- */
.pub-list { list-style: none; padding: 0; margin: 0; }
.pub-list li { padding: 0; border-bottom: 1px dashed var(--border); }
.pub-list li:last-child { border-bottom: 0; }
.pub-list li.has-link { padding: 0; }
.pub-list li > a.pub-row,
.pub-list li {
  position: relative;
}
.pub-list a.pub-row {
  display: block;
  padding: 12px 14px;
  margin: 2px -14px;
  color: var(--fg);
  border-radius: var(--radius-sm);
  border: 1px solid transparent;
  transition: background 120ms, border-color 120ms, transform 120ms;
}
.pub-list a.pub-row:hover {
  background: var(--accent-soft);
  border-color: var(--accent);
  text-decoration: none;
  transform: translateX(2px);
}
.pub-list a.pub-row:hover .title { color: var(--accent); }
.pub-list a.pub-row:hover .link-tag { border-color: var(--accent); color: var(--accent); }
.pub-list li:not(.has-link) { padding: 12px 0; }
.pub-list .idx { color: var(--fg-muted); font-weight: 600; margin-right: 6px; }
.pub-list .badge {
  font-size: 11px; padding: 2px 6px; border-radius: 4px;
  background: var(--tag-bg); color: var(--tag-fg);
  margin-right: 6px; vertical-align: middle;
}
.pub-list .badge.sci { background: #fde68a; color: #78350f; }
.pub-list .badge.oral { background: #dcfce7; color: #166534; }
.pub-list .badge.review { background: #ffe4e6; color: #9f1239; }
.pub-list .badge.award { background: #ffedd5; color: #9a3412; }
.pub-list .me { font-weight: 700; }
.pub-list .venue { color: var(--fg-muted); font-style: italic; }
.pub-list .title { transition: color 120ms; }
.pub-list .link-tag {
  display: inline-block; font-size: 11px; padding: 1px 6px; border-radius: 3px;
  margin-left: 6px; border: 1px solid var(--border); color: var(--fg-muted);
  transition: color 120ms, border-color 120ms;
}

/* ----- Paper card grid (CVPR-style listing on /papers/) ----- */
.paper-card-grid {
  display: flex; flex-direction: column;
  gap: 12px;
  margin-top: 8px;
}
.paper-card {
  display: grid;
  grid-template-columns: 200px 1fr;
  gap: 18px;
  padding: 14px;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  background: var(--bg-card);
  color: var(--fg);
  text-decoration: none;
  transition: border-color 120ms, background 120ms, box-shadow 120ms, transform 120ms;
}
.paper-card:hover {
  border-color: var(--accent);
  background: var(--accent-soft);
  box-shadow: 0 4px 14px rgba(0,0,0,0.05);
  transform: translateY(-2px);
  text-decoration: none;
}
.paper-card-thumb {
  width: 100%; aspect-ratio: 5 / 3;
  background: var(--bg-soft);
  border-radius: 6px;
  overflow: hidden;
  display: flex; align-items: center; justify-content: center;
  border: 1px solid var(--border);
}
.paper-card-thumb img {
  width: 100%; height: 100%; object-fit: cover; display: block;
  transition: transform 220ms ease;
}
.paper-card:hover .paper-card-thumb img { transform: scale(1.03); }
.paper-card-placeholder { font-size: 32px; color: var(--fg-soft); }

.paper-card-info {
  min-width: 0;
  display: flex; flex-direction: column; gap: 6px;
}
.paper-card-venue { display: flex; align-items: center; gap: 8px; flex-wrap: wrap; }
.venue-pill {
  display: inline-block;
  font-size: 11px; font-weight: 700; letter-spacing: 0.4px;
  padding: 3px 8px;
  border-radius: 3px;
  background: var(--accent);
  color: white;
  text-transform: uppercase;
}
.paper-card .venue-note {
  font-size: 12px;
  color: var(--fg-muted);
  font-style: italic;
}
.paper-card-title {
  font-size: 16px; font-weight: 700; line-height: 1.35;
  color: var(--fg);
  letter-spacing: -0.2px;
}
.paper-card:hover .paper-card-title { color: var(--accent); }
.paper-card-authors {
  font-size: 13px; line-height: 1.5;
  color: var(--fg-muted);
}
.paper-card-authors .me { color: var(--fg); font-weight: 700; }
.paper-card-affiliation {
  font-size: 12px; color: var(--fg-soft); margin-top: 2px;
}

@media (max-width: 640px) {
  .paper-card { grid-template-columns: 1fr; }
  .paper-card-thumb { aspect-ratio: 16 / 9; }
}

/* ----- Patents ----- */
.patent-table { width: 100%; border-collapse: collapse; font-size: 14px; }
.patent-table th, .patent-table td { padding: 8px 10px; border-bottom: 1px solid var(--border); text-align: left; vertical-align: top; }
.patent-table th { background: var(--bg-soft); font-weight: 600; color: var(--fg-muted); }
.patent-table td.num { white-space: nowrap; color: var(--fg-muted); }

/* ----- Paper detail ----- */
.paper-header { padding: 40px 0 16px; }
.paper-header h1 { font-size: 30px; margin: 0 0 8px; line-height: 1.3; }
.paper-header .venue-line { color: var(--fg-muted); margin: 6px 0; }
.paper-header .authors { margin: 6px 0; color: var(--fg); }
.paper-header .affiliation { color: var(--fg-muted); font-size: 14px; }
.paper-header .link-row { display: flex; gap: 8px; margin-top: 14px; flex-wrap: wrap; }
.btn-link {
  border: 1px solid var(--border); padding: 6px 14px; border-radius: 999px;
  font-size: 13px; color: var(--fg); background: white; display: inline-flex; align-items: center; gap: 6px;
}
.btn-link:hover { background: var(--accent-soft); border-color: var(--accent); text-decoration: none; }
.btn-link[data-type="arxiv"] { border-color: #b91c1c; color: #b91c1c; }
.btn-link[data-type="ieee"] { border-color: #1e40af; color: #1e40af; }
.btn-link[data-type="cvf_openaccess"] { border-color: #0e7490; color: #0e7490; }
.btn-link[data-type="acm"] { border-color: #115e59; color: #115e59; }
.btn-link[data-type="mlr"] { border-color: #6d28d9; color: #6d28d9; }
.btn-link[data-type="code"] { border-color: #111; color: #111; }
.btn-link[data-type="project_page"] { border-color: #047857; color: #047857; }

/* YouTube presentation embed shown at the top of paper detail pages. */
.paper-video {
  margin: 12px auto 18px;
  border: 1px solid var(--border); border-radius: var(--radius);
  overflow: hidden;
  position: relative;
  aspect-ratio: 16 / 9;
  background: #000;
  max-width: 680px;
}
.paper-video iframe { width: 100%; height: 100%; display: block; border: 0; }
.paper-section-heading {
  margin: 28px 0 6px;
  font-size: 20px;
  border-left: 4px solid var(--accent);
  padding-left: 12px;
  letter-spacing: -0.2px;
  font-weight: 700;
}

.paper-thumb {
  margin: 24px 0 12px; border: 1px solid var(--border); border-radius: var(--radius);
  background: var(--bg-soft); overflow: hidden;
}
.paper-thumb img { width: 100%; max-height: 560px; object-fit: contain; background: white; display: block; }
.paper-thumb figcaption { padding: 10px 16px; color: var(--fg-muted); font-size: 13px; line-height: 1.5; border-top: 1px solid var(--border); background: white; }

.paper-figure {
  margin: 18px 0 26px; border: 1px solid var(--border); border-radius: var(--radius);
  background: white; overflow: hidden;
}
.paper-figure img { width: 100%; max-height: 540px; object-fit: contain; background: white; display: block; }
.paper-figure figcaption { padding: 10px 16px; color: var(--fg-muted); font-size: 13px; line-height: 1.55; border-top: 1px solid var(--border); }

/* Horizontal row of small figures (e.g. DIFAI "Continuous Inpainting").
   Matches original: flex row, items at natural ratio, caption left-aligned. */
.row-figure-grid {
  display: flex;
  flex-direction: row;
  justify-content: center;
  align-items: flex-start;
  gap: 10px;
  margin: 18px 0 8px;
  flex-wrap: wrap;
}
.row-figure {
  margin: 0;
  display: flex; flex-direction: column;
  justify-content: flex-start;
  align-items: flex-start;
  flex: 1 1 0;
  min-width: 120px;
  max-width: 200px;
  background: transparent;
  border: 0;
}
.row-figure img {
  width: 100%; height: auto;
  object-fit: contain; background: white; display: block;
  border-radius: 4px;
  box-shadow: 0 4px 24px rgba(150, 163, 181, 0.08);
}
.row-figure figcaption {
  margin: 5px 0 0;
  text-align: left;
  color: var(--fg); font-weight: 700; font-size: 14px;
  border: 0;
  padding: 0;
}
.figure-caption-after { color: var(--fg); font-size: 14px; margin: 18px 0 18px; line-height: 1.65; text-align: justify; }

@media (max-width: 720px) {
  .row-figure-grid { gap: 8px; }
  .row-figure { min-width: 100px; max-width: 46%; }
}

.paper-body h2 {
  margin: 32px 0 10px; font-size: 20px; border-left: 4px solid var(--accent); padding-left: 12px;
  letter-spacing: -0.2px;
}
.paper-body p { margin: 8px 0; line-height: 1.7; }
.paper-body ul { margin: 8px 0; padding-left: 22px; line-height: 1.7; }
.paper-body ul li { margin: 4px 0; }

.bibtex-box {
  background: #0e1116; color: #e6edf3; padding: 16px 18px;
  border-radius: var(--radius); overflow-x: auto; font-size: 13px;
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
  position: relative;
}
.bibtex-box pre { margin: 0; white-space: pre-wrap; word-break: break-word; }
.bibtex-box button.copy {
  position: absolute; top: 8px; right: 8px;
  background: #1f2937; color: #e6edf3; border: 0; padding: 4px 8px; font-size: 12px;
  border-radius: 4px; cursor: pointer;
}
.bibtex-box button.copy:hover { background: #374151; }

/* ----- News cards ----- */
.news-grid {
  display: grid; gap: 20px;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  align-items: stretch;
}
.news-card {
  background: var(--bg-card); border: 1px solid var(--border); border-radius: var(--radius);
  overflow: hidden; display: flex; flex-direction: column; color: var(--fg);
  box-shadow: var(--shadow);
  height: 380px;                    /* fixed card height */
  transition: transform 120ms, box-shadow 120ms, border-color 120ms;
}
.news-card:hover {
  text-decoration: none;
  transform: translateY(-3px);
  border-color: var(--accent);
  box-shadow: 0 4px 18px rgba(47,79,58,0.12), 0 1px 2px rgba(0,0,0,0.05);
}
.news-card .thumb {
  height: 180px;                    /* fixed thumbnail height */
  background: var(--bg-soft);
  overflow: hidden;
  flex-shrink: 0;
}
.news-card .thumb img {
  width: 100%; height: 100%;
  object-fit: cover;                /* uniform crop */
  display: block;
  transition: transform 220ms ease;
}
.news-card:hover .thumb img { transform: scale(1.04); }
.news-card .body {
  padding: 14px 16px 16px;
  flex: 1; min-height: 0;
  display: flex; flex-direction: column; gap: 8px;
}
.news-card .date {
  color: var(--fg-muted); font-size: 12px;
  letter-spacing: 0.2px;
}
.news-card .title {
  font-weight: 600; font-size: 15px; line-height: 1.4;
  display: -webkit-box;
  -webkit-line-clamp: 2;            /* title clamped to 2 lines */
  line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  min-height: 42px;                 /* reserves the same height even for 1-line titles */
}
.news-card .summary {
  color: var(--fg-muted); font-size: 13px; line-height: 1.55;
  display: -webkit-box;
  -webkit-line-clamp: 4;            /* summary clamped to 4 lines */
  line-clamp: 4;
  -webkit-box-orient: vertical;
  overflow: hidden;
  flex: 1;
}

/* ----- Career detail ----- */
.career-hero {
  display: flex; align-items: center; gap: 22px;
  padding: 28px 28px; border-radius: var(--radius);
  background: linear-gradient(135deg, var(--hero-from, #eef2ff) 0%, var(--hero-to, #f5f7fa) 100%);
  border: 1px solid var(--border);
  margin-bottom: 28px;
  position: relative; overflow: hidden;
}
.career-hero::after {
  content: "";
  position: absolute; top: -40%; right: -10%;
  width: 240px; height: 240px; border-radius: 50%;
  background: radial-gradient(circle, var(--hero-accent, #ffffff80), transparent 70%);
  pointer-events: none;
}
.career-hero .logo-wrap {
  flex-shrink: 0;
  width: 96px; height: 96px;
  border-radius: 14px;
  background: white;
  display: flex; align-items: center; justify-content: center;
  box-shadow: 0 2px 10px rgba(0,0,0,0.06), 0 0 0 1px rgba(0,0,0,0.04);
  padding: 12px;
}
/* Metaent mark is taller (icon stacked on text); give it a larger card. */
.career-hero.meta .logo-wrap { width: 120px; height: 120px; padding: 8px; }
.career-hero .logo-wrap img { max-width: 100%; max-height: 100%; object-fit: contain; }
.career-hero .head h1 { font-size: 30px; margin: 0 0 6px; letter-spacing: -0.4px; }
.career-hero .head .meta { color: var(--fg-muted); font-size: 14px; margin: 0; }
.career-hero .head .badge-row { display: flex; gap: 6px; margin-top: 10px; flex-wrap: wrap; }
.career-hero .head .role-badge {
  display: inline-block; font-size: 12px; padding: 4px 10px;
  background: rgba(255,255,255,0.7); border: 1px solid var(--border);
  border-radius: 999px; color: var(--fg);
}

.career-detail h1 { font-size: 28px; margin: 16px 0 4px; }
.career-detail .meta { color: var(--fg-muted); margin-bottom: 16px; }
.career-detail .task-grid {
  display: grid; gap: 14px; grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  margin: 12px 0 24px;
}
.career-detail a.task-card {
  background: var(--bg-card); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 16px 18px; font-size: 14px;
  color: var(--fg);
  display: flex; flex-direction: column;
  transition: transform 120ms, border-color 120ms, box-shadow 120ms, background 120ms;
  text-decoration: none;
  position: relative;
}
.career-detail a.task-card:hover {
  transform: translateY(-2px);
  border-color: var(--accent);
  background: var(--accent-soft);
  box-shadow: 0 4px 18px rgba(0,0,0,0.06);
  text-decoration: none;
}
.career-detail a.task-card:hover .name { color: var(--accent); }
.career-detail a.task-card:hover::after {
  content: "→";
  position: absolute; top: 14px; right: 16px;
  color: var(--accent); font-weight: 700;
}
.career-detail .task-card .name { font-weight: 700; margin-bottom: 8px; transition: color 120ms; }
.career-detail .task-card ul { margin: 4px 0 0 16px; padding: 0; color: var(--fg-muted); }
/* ===== Project selector + accordion panels (career pages) ===== */
.career-detail .proj-select-grid {
  display: grid; gap: 14px; grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  margin: 12px 0 0; align-items: stretch;
}
.career-detail .proj-card {
  background: var(--bg-card); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 16px 18px; font: inherit; font-size: 14px; color: var(--fg);
  display: flex; flex-direction: column; text-align: left; cursor: pointer;
  transition: transform 120ms, border-color 120ms, box-shadow 120ms, background 120ms;
  position: relative;
}
.career-detail .proj-card:hover {
  transform: translateY(-2px); border-color: var(--accent);
  box-shadow: 0 4px 18px rgba(0,0,0,0.06);
}
.career-detail .proj-card.active {
  border-color: var(--accent); background: #fff;
  border-bottom-color: #fff;
  border-bottom-left-radius: 0; border-bottom-right-radius: 0;
  position: relative; z-index: 2; margin-bottom: -1px;
  box-shadow: 0 4px 18px rgba(0,0,0,0.07);
}
/* selected card is fully inert on hover; non-selected keep the default hover */
.career-detail .proj-card.active:hover {
  transform: none; background: #fff;
  border-color: var(--accent); border-bottom-color: #fff;
  box-shadow: 0 4px 18px rgba(0,0,0,0.07);
}
.career-detail .proj-card.active .name { color: var(--accent); }
.career-detail .proj-card .name { font-weight: 700; margin-bottom: 8px; transition: color 120ms; }
.career-detail .proj-card ul { margin: 4px 0 0 16px; padding: 0; color: var(--fg-muted); }
.career-detail .proj-card::after {
  content: "▾"; position: absolute; top: 14px; right: 16px;
  color: var(--accent); font-weight: 700; opacity: 0; transition: opacity 120ms;
}
.career-detail .proj-card.active::after { display: none; }
.career-detail .proj-panel { display: none; }
/* selector includes .project so #fff wins over .project.lemon/.cream tints below */
.career-detail .project.proj-panel.active {
  display: block; animation: projFade .25s ease;
  margin-top: 0; background: #fff;
  border: 1px solid var(--accent);
  border-radius: 0 0 var(--radius) var(--radius);
  box-shadow: 0 10px 26px rgba(0,0,0,0.06);
  padding-top: 36px;
}
@keyframes projFade { from { opacity: 0; transform: translateY(6px); } to { opacity: 1; transform: none; } }

.career-detail .project {
  padding: 28px 32px;
  background: var(--bg-soft);
  border-radius: var(--radius);
  margin: 24px 0;
  border: 1px solid var(--border);
}
/* Project background variants — all achromatic (different gray shades). */
.career-detail .project.cream { background: #fafafa; }    /* very light gray */
.career-detail .project.lemon { background: #f4f4f5; }    /* light gray */
.career-detail .project.mint  { background: #efefef; }    /* medium-light gray */
.career-detail .project.sky   { background: #f7f7f8; }    /* near-default gray */
.career-detail .project h3 { margin: 0 0 16px; font-size: 19px; color: var(--fg); }
.career-detail .project h4 { margin: 16px 0 6px; font-size: 14px; color: var(--accent); letter-spacing: 0.2px; }
.career-detail .project ul { margin: 4px 0 8px 18px; padding: 0; color: var(--fg); }
.career-detail .project ul li { margin: 2px 0; }
/* small circle bullets (icon-link-list keeps its disc) */
.career-detail .project ul:not(.icon-link-list) { list-style: none; }
.career-detail .project ul:not(.icon-link-list) > li { position: relative; }
.career-detail .project ul:not(.icon-link-list) > li::before { content: ''; position: absolute; left: -12px; top: 0.55em; width: 4.5px; height: 4.5px; border-radius: 50%; background: var(--fg); }
.career-detail .related-links { margin: 12px 0; display: flex; flex-direction: column; gap: 6px; }
.career-detail .related-links a { font-size: 14px; }

/* Inline brand-icon links used in career detail pages (e.g. YouTube / Instagram). */
.career-detail .brand-link {
  display: inline-flex; align-items: center; gap: 8px;
  font-size: 14px;
}
.career-detail .brand-link svg { width: 18px; height: 18px; flex-shrink: 0; }
.career-detail .brand-link.yt svg { color: #ff0033; }
.career-detail .brand-link.ig svg { color: #e4405f; }
.career-detail .brand-link.news svg { color: var(--accent-strong); }
.career-detail .brand-link.paper svg { color: var(--accent-strong); }

/* Bulleted list of icon-prefixed links (used in metaent / ku career pages). */
.career-detail .icon-link-list {
  list-style: disc;
  margin: 6px 0 0 22px;
  padding: 0;
}
.career-detail .icon-link-list li { margin: 4px 0; font-size: 14px; }
.career-detail .icon-link-list li > a {
  color: var(--accent-strong);
  font-weight: 600;
}
.career-detail .icon-link-list li > a:hover {
  color: var(--accent);
  text-decoration: underline;
}

/* Grouped "관련 연구" block: category label + bullets per category. */
.career-detail .related-groups {
  margin: 10px 0 0;
  display: flex; flex-direction: column; gap: 12px;
  padding: 12px 14px;
  background: rgba(255,255,255,0.55);
  border: 1px solid var(--border);
  border-radius: 10px;
}
.career-detail .related-group .group-label {
  font-size: 11px; font-weight: 700;
  color: var(--accent);
  text-transform: uppercase; letter-spacing: 0.6px;
  margin-bottom: 4px;
}
.career-detail .related-group ul {
  list-style: disc;
  margin: 4px 0 0 22px;
  padding: 0;
}
.career-detail .related-group ul li { margin: 3px 0; font-size: 14px; }

/* Grouped achievements: themed outcome groups with metric sub-lines (deck-style). */
.career-detail .outcome-groups { margin: 4px 0 8px; display: flex; flex-direction: column; gap: 12px; }
.career-detail .outcome-group .group-label {
  font-size: 13px; font-weight: 700; color: var(--fg);
  border-left: 3px solid var(--accent); padding-left: 8px; margin-bottom: 4px;
}
.career-detail .outcome-group ul { list-style: disc; margin: 4px 0 0 18px; padding: 0; }
.career-detail .outcome-group ul li { margin: 4px 0; }
.career-detail .outcome-group ul li .sub {
  display: block; font-size: 12.5px; color: var(--fg-muted); margin-top: 2px;
}

/* Contribution & collaboration block (mirrors the deck's contribution banner). */
.career-detail .contrib {
  display: flex; align-items: center; gap: 16px;
  padding: 12px 16px; margin: 6px 0 4px;
  background: var(--accent-soft); border: 1px solid var(--border); border-radius: 10px;
}
.career-detail .contrib-donut { width: 62px; height: 62px; flex-shrink: 0; }
.career-detail .contrib-text { font-size: 13px; line-height: 1.5; }
.career-detail .contrib-role { font-weight: 700; color: var(--fg); }
.career-detail .contrib-collab { color: var(--fg-muted); margin-top: 4px; }
.career-detail .contrib-collab strong { color: var(--accent-strong); margin-right: 5px; }

/* ===== Phase-based career project layout (title + contribution header, staged sections) ===== */
.career-detail .project .proj-head { display: flex; justify-content: space-between; align-items: flex-start; gap: 20px; flex-wrap: wrap; margin-bottom: 32px; }
.career-detail .project .proj-head h3 { margin: 0; font-size: 25px; line-height: 1.25; }
/* contribution — minimal (no box): accent label (left) + role + collaboration (right) */
.career-detail .project .proj-head .contrib-min { max-width: 520px; display: flex; align-items: center; gap: 16px; text-align: left; }
.career-detail .project .contrib-min .pill { flex-shrink: 0; font-size: 12.5px; font-weight: 700; letter-spacing: .5px; color: var(--accent); }
.career-detail .project .contrib-min .c-role { font-size: 12.5px; font-weight: 700; color: var(--fg); }
.career-detail .project .contrib-min .c-collab { font-size: 11px; color: var(--fg-muted); margin-top: 3px; line-height: 1.45; }
.career-detail .project .contrib-min .c-collab strong { color: var(--accent-strong); margin-right: 5px; font-weight: 700; }
/* phase blocks: each stage = numbered title + text + its own image */
.career-detail .project .phase + .phase { margin-top: 20px; padding-top: 18px; border-top: 1px solid var(--border); }
.career-detail .project .phase-title { display: flex; align-items: center; gap: 9px; font-size: 15px; font-weight: 800; color: var(--accent); margin: 0 0 10px; }
.career-detail .project .phase-title .pnum { display: inline-flex; align-items: center; justify-content: center; width: 22px; height: 22px; border-radius: 50%; background: var(--accent); color: #fff; font-size: 12px; font-weight: 700; flex-shrink: 0; }
.career-detail .project .phase .project-row { margin-top: 0; align-items: start; }
.career-detail .project .phase .project-images { align-self: center; }
.career-detail .project .phase .blabel { font-size: 11.5px; font-weight: 700; letter-spacing: .3px; color: var(--fg-muted); margin: 12px 0 1px; }
.career-detail .project .phase .project-text > .blabel:first-child { margin-top: 0; }
.career-detail .project .phase ul { margin: 2px 0 4px 18px; }
/* indented detail/metric line under an achievement bullet */
.career-detail .project ul li .sub { display: block; font-size: 12.5px; color: var(--fg-muted); line-height: 1.55; margin: 3px 0 0 1px; padding-left: 11px; border-left: 2px solid var(--border); }
.career-detail .project ul li .sub a { color: var(--fg-muted); font-weight: 600; text-decoration: underline; text-decoration-color: var(--fg-muted); text-underline-offset: 2px; }
.career-detail .project ul li .sub a::after { content: '\2197'; margin-left: 2px; font-weight: 700; }
.career-detail .project ul li .sub a:hover { color: var(--accent); text-decoration-color: var(--accent); }
.career-detail .project .phase ul li > a { color: var(--accent-strong); font-weight: 600; }
.career-detail .project .phase ul li > a:hover { color: var(--accent); text-decoration: underline; }
.career-detail .project ul li > a.inline-work-link {
  color: inherit;
  font-weight: inherit;
  text-decoration: underline;
  text-decoration-color: currentColor;
  text-underline-offset: 2px;
}
.career-detail .project ul li > a.inline-work-link:hover { color: var(--accent); }

/* Links inside career detail pages use a darker variant of the page accent,
   so they're obviously clickable but still match the page color identity. */
.career-detail {
  --accent-strong: color-mix(in srgb, var(--accent) 70%, black);
}
.career-detail .related-group ul li a,
.career-detail .related-links a,
.career-detail .brand-link {
  color: var(--accent-strong);
  font-weight: 600;
}
.career-detail .related-group ul li a:hover,
.career-detail .related-links a:hover,
.career-detail .brand-link:hover {
  color: var(--accent);
  text-decoration: underline;
}
.career-detail .project-figure {
  margin: 0; border: 1px solid var(--border); border-radius: var(--radius-sm);
  background: white; overflow: hidden; transition: border-color .2s ease, box-shadow .2s ease;
}
.career-detail .project-figure img { width: 100%; max-height: 460px; object-fit: contain; background: white; display: block; }
/* Clickable video thumbnail (links out to YouTube instead of embedding) */
.career-detail .project-figure .video-thumb {
  position: relative; display: block; aspect-ratio: 16 / 9;
  background: #000; cursor: pointer; overflow: hidden;
}
.career-detail .project-figure .video-thumb img {
  width: 100%; height: 100%; max-height: none; object-fit: cover; display: block;
  transition: transform .3s ease, filter .3s ease;
}
.career-detail .project-figure .video-thumb .play-badge {
  position: absolute; top: 50%; left: 50%; width: 60px; height: auto;
  transform: translate(-50%, -50%); opacity: .9;
  transition: opacity .2s ease, transform .2s ease;
  filter: drop-shadow(0 2px 8px rgba(0,0,0,.4)); pointer-events: none;
}
.career-detail .project-figure .video-thumb:hover img { transform: scale(1.05); filter: brightness(.82); }
.career-detail .project-figure .video-thumb:hover .play-badge { opacity: 1; transform: translate(-50%, -50%) scale(1.1); }
.career-detail .project-figure .video-thumb:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }
/* Clickable figure thumbnail that links to a paper/project page */
.career-detail .project-figure a { display: block; cursor: pointer; }
.career-detail .project-figure a img { transition: transform .3s ease, filter .3s ease; }
.career-detail .project-figure a:hover img { transform: scale(1.04); filter: brightness(.93); }
.career-detail .project-figure a:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }
/* accent border on the figure while its link is hovered/focused */
.career-detail .project-figure:has(a:hover),
.career-detail .project-figure:has(a:focus-visible) { border-color: var(--accent); }
/* TTS / chat panels: make the media column a touch smaller (desktop only) */
@media (min-width: 821px) {
  .career-detail #proj-tts .project-row,
  .career-detail #proj-chat .project-row { grid-template-columns: minmax(0, 1.25fr) minmax(0, 1fr); }
}
.career-detail .project-figure figcaption {
  padding: 10px 14px; color: var(--fg); font-size: 13px; font-weight: 600;
  border-top: 1px solid var(--border); text-align: center;
}

/* Two-column project layout: text on the left, images stacked on the right. */
.career-detail .project-row {
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) minmax(0, 1fr);
  gap: 32px;
  align-items: start;
  margin-top: 8px;
}
.career-detail .project-text { min-width: 0; }
.career-detail .project-images {
  display: flex; flex-direction: column; gap: 16px;
}
@media (max-width: 820px) {
  .career-detail .project-row { grid-template-columns: 1fr; }
}

/* 2x2 mini paper card grid (used for IP project showing related papers). */
.career-detail .paper-mini-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
}
.career-detail .paper-mini {
  display: flex; flex-direction: column;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: white;
  overflow: hidden;
  color: var(--fg);
  text-decoration: none;
  transition: border-color 120ms, transform 120ms, box-shadow 120ms;
}
.career-detail .paper-mini:hover {
  border-color: var(--accent);
  transform: translateY(-2px);
  box-shadow: 0 4px 10px rgba(0,0,0,0.06);
  text-decoration: none;
}
.career-detail .paper-mini-thumb {
  aspect-ratio: 16 / 10;
  background: var(--bg-soft);
  overflow: hidden;
}
.career-detail .paper-mini-thumb img {
  width: 100%; height: 100%; object-fit: cover; display: block;
  transition: transform 220ms;
}
.career-detail .paper-mini:hover .paper-mini-thumb img { transform: scale(1.04); }
.career-detail .paper-mini-thumb.quad { display: grid; grid-template-columns: 1fr 1fr; grid-template-rows: 1fr 1fr; gap: 1px; background: var(--border); }
.career-detail .paper-mini-body { padding: 8px 10px 10px; }
.career-detail .paper-mini-venue {
  font-family: ui-monospace, monospace;
  font-size: 10px;
  font-weight: 700;
  color: var(--accent);
  letter-spacing: 0.4px;
  text-transform: uppercase;
  margin-bottom: 4px;
}
.career-detail .paper-mini-title {
  font-size: 12px;
  font-weight: 600;
  line-height: 1.35;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

/* ----- Work & Activities timeline (two columns) ----- */
.career-detail .wa { display: grid; grid-template-columns: 1.3fr 1fr; gap: 26px; align-items: start; margin: 4px 0 44px; }
.career-detail .wa-h { display: flex; align-items: baseline; gap: 8px; font-size: 14px; font-weight: 800; color: var(--accent); border-bottom: 2px solid var(--accent-soft); padding-bottom: 5px; margin-bottom: 1px; }
.career-detail .wa-col.edu .wa-h { color: #475569; border-bottom-color: #e2e8f0; }
.career-detail .wa-ct { font-size: 11px; font-weight: 700; color: var(--fg-muted); }
.career-detail .wa ul { list-style: none; margin: 0; padding: 0; }
.career-detail .wa li { display: flex; gap: 13px; align-items: baseline; padding: 4px 0; border-bottom: 1px solid #f1f2f4; }
.career-detail .wa li:last-child { border-bottom: none; }
.career-detail .wa-y { flex: 0 0 76px; font-family: 'Space Grotesk', sans-serif; font-variant-numeric: tabular-nums; font-size: 10.5px; font-weight: 700; color: var(--accent); letter-spacing: 0.3px; white-space: nowrap; }
.career-detail .meta-period { font-family: 'Space Grotesk', sans-serif; font-variant-numeric: tabular-nums; }
.career-detail .wa-col.edu .wa-y { color: #64748b; }
.career-detail .wa-nm { flex: 1; min-width: 0; display: flex; align-items: baseline; flex-wrap: wrap; column-gap: 6px; font-size: 13.5px; font-weight: 600; color: var(--fg); margin-top: 0; line-height: 1.32; }
.career-detail .wa-name { flex: 0 0 auto; min-width: 168px; }
.career-detail .wa-role { font-size: 11px; font-weight: 500; color: var(--fg-muted); white-space: nowrap; flex: 0 0 auto; min-width: 74px; }
.career-detail .wa-sub { flex-basis: 100%; font-weight: 500; color: var(--fg-muted); font-size: 11.5px; margin-top: 2px; }
.career-detail .wa-news { font-size: 10px; font-weight: 600; color: var(--accent-strong); text-decoration: none; white-space: nowrap; }
.career-detail .wa-news:hover { text-decoration: underline; }
.career-detail .wa-goto { color: inherit; text-decoration: none; cursor: pointer; border-bottom: 1px dashed var(--border); }
.career-detail .wa-goto:hover { color: var(--accent); border-bottom-color: var(--accent); }
.career-detail .wa-nb { white-space: nowrap; }
/* KR view: render the lone Latin name (KDT) in the system font so it visually
   matches the Korean names instead of looking larger in Montserrat */
html.lang-ko .career-detail .wa-nb { font-family: -apple-system, BlinkMacSystemFont, "Apple SD Gothic Neo", "Noto Sans KR", sans-serif; }
@media (max-width: 680px) {
  .career-detail .wa { grid-template-columns: 1fr; gap: 10px; }
  .career-detail .wa-nb { white-space: normal; }
}

/* ----- Footer ----- */
footer.site-footer {
  border-top: 1px solid var(--border); padding: 32px 0; margin-top: 48px;
  color: var(--fg-muted); font-size: 13px; text-align: center;
}

/* ----- Mobile ----- */
@media (max-width: 720px) {
  .hero-grid { grid-template-columns: 1fr; }
  .hero .avatar { width: 140px; height: 140px; }
  .hero h1 { font-size: 28px; }
  .site-header .inner { flex-direction: column; gap: 8px; }
  nav.primary { justify-content: center; }
  .paper-header h1 { font-size: 24px; }
}