:root {
  --accent: #8c2222;
  --accent-dark: #5f1518;
  --accent-soft: #f7eeee;
  --accent-line: #e6c8c8;
  --ink: #1d2026;
  --muted: #626976;
  --subtle: #f5f6f8;
  --bg: #ffffff;
  --card: #ffffff;
  --line: #dde1e7;
  --max: 1180px;
  --radius: 8px;
  --shadow: 0 18px 44px rgba(31, 38, 52, .08);
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: Arial, "Helvetica Neue", Helvetica, sans-serif;
  color: var(--ink);
  background: var(--bg);
  line-height: 1.62;
}

a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; text-underline-offset: 3px; }
img { max-width: 100%; height: auto; }

.skip-link {
  position: absolute;
  left: -999px;
  top: 10px;
  z-index: 1000;
  background: #fff;
  color: var(--accent);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 10px 14px;
}

.skip-link:focus { left: 10px; }
.wrap { min-height: 100dvh; }

.top {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255, 255, 255, .94);
  backdrop-filter: saturate(180%) blur(14px);
  border-bottom: 1px solid var(--line);
}

.top-inner {
  max-width: var(--max);
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  padding: 14px 22px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 11px;
  flex: 0 0 auto;
  color: var(--ink);
  font-weight: 900;
  font-size: 18px;
  letter-spacing: 0;
}

.brand:hover { text-decoration: none; color: var(--accent-dark); }

.brand-name { white-space: nowrap; }

.nav {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 16px;
  flex-wrap: wrap;
}

.nav a {
  color: #2c3138;
  font-size: 14px;
  font-weight: 800;
  line-height: 1;
}

.nav a.active {
  color: var(--accent);
  text-decoration: underline;
  text-underline-offset: 7px;
}

.contact-link,
.lang-link {
  border: 1px solid var(--accent-line);
  border-radius: 999px;
  padding: 9px 12px;
}

.contact-link {
  color: #fff !important;
  background: var(--accent);
  border-color: var(--accent);
}

.lang-link { color: var(--accent-dark) !important; background: #fff; }

.nav-toggle {
  display: none;
  border: 1px solid var(--line);
  background: #fff;
  color: var(--ink);
  border-radius: 999px;
  padding: 8px 12px;
  font-size: 13px;
  font-weight: 900;
}

.hero {
  position: relative;
  overflow: hidden;
  background: radial-gradient(circle at 16% 18%, rgba(47, 111, 120, .14), transparent 28%),
    radial-gradient(circle at 82% 12%, rgba(140, 34, 34, .12), transparent 26%),
    linear-gradient(135deg, #fff 0%, #fbfbfc 54%, #f7eeee 100%);
  border-bottom: 1px solid var(--line);
}

.hero::before,
.hero::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
}

.hero::before {
  opacity: .54;
  background-image:
    radial-gradient(circle, rgba(140, 34, 34, .34) 0 5px, transparent 6px),
    linear-gradient(32deg, transparent 0 46%, rgba(140, 34, 34, .14) 47% 48%, transparent 49%),
    linear-gradient(148deg, transparent 0 46%, rgba(47, 111, 120, .13) 47% 48%, transparent 49%);
  background-size: 144px 104px, 144px 104px, 144px 104px;
  background-position: 28px 24px, 0 0, 0 0;
}

.hero::after {
  background: linear-gradient(90deg, #fff 0%, rgba(255, 255, 255, .86) 40%, rgba(255, 255, 255, .22) 100%);
}

.hero-grid {
  position: relative;
  z-index: 1;
  max-width: var(--max);
  margin: 0 auto;
  display: grid;
  grid-template-columns: minmax(0, 1.08fr) minmax(280px, .72fr);
  gap: 52px;
  align-items: center;
  min-height: 640px;
  padding: 70px 22px 62px;
}

.hero-copy { max-width: 700px; }

.hero h1,
.page-hero h1,
.section-title {
  font-weight: 900;
  line-height: 1.04;
  letter-spacing: 0;
  color: var(--accent-dark);
}

.hero h1 {
  margin: 0 0 22px;
  font-size: clamp(44px, 6vw, 86px);
}

.hero p {
  margin: 0 0 28px;
  max-width: 640px;
  color: #3f4650;
  font-size: clamp(18px, 2vw, 24px);
}

.hero-actions,
.actions {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  align-items: center;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 42px;
  gap: 8px;
  border: 1px solid var(--accent);
  border-radius: 999px;
  padding: 10px 17px;
  background: var(--accent);
  color: #fff;
  font-size: 14px;
  font-weight: 900;
  text-decoration: none;
  box-shadow: 0 10px 24px rgba(140, 34, 34, .17);
}

.btn:hover { background: var(--accent-dark); text-decoration: none; }
.btn.secondary { background: var(--accent); color: #fff; }
.btn.ghost { background: #fff; color: var(--accent-dark); box-shadow: none; }

.hero-metrics,
.metric-strip,
.stats {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
}

.hero-metrics { margin-top: 34px; max-width: 760px; }

.hero-identifiers {
  margin-top: 26px;
  max-width: 760px;
}

.hero-identifiers-title {
  margin-bottom: 10px;
  color: var(--accent-dark);
  font-size: 13px;
  font-weight: 900;
  text-transform: uppercase;
  letter-spacing: 0;
}

.hero-id-list {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 9px;
}

.hero-id-chip {
  display: inline-grid;
  grid-template-columns: 22px auto;
  grid-template-rows: auto auto;
  column-gap: 8px;
  align-items: center;
  min-height: 46px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: rgba(255, 255, 255, .9);
  color: var(--ink);
  padding: 7px 12px;
  box-shadow: 0 8px 22px rgba(31, 38, 52, .06);
  min-width: 0;
}

.hero-id-chip:hover { text-decoration: none; border-color: var(--accent-line); }

.hero-id-chip img {
  grid-row: 1 / 3;
  width: 22px;
  height: 22px;
  object-fit: contain;
}

.hero-id-chip strong {
  color: var(--accent-dark);
  font-size: 13px;
  line-height: 1.1;
  min-width: 0;
}

.hero-id-chip span {
  color: var(--muted);
  font-size: 12px;
  line-height: 1.15;
  min-width: 0;
  overflow-wrap: anywhere;
}

.source-metrics {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
  margin-bottom: 24px;
}

.source-metric {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 10px;
  border: 1px solid var(--line);
  border-left: 5px solid var(--accent);
  border-radius: var(--radius);
  background: #fff;
  padding: 18px;
  box-shadow: var(--shadow);
  color: var(--ink);
}

.source-metric:hover { text-decoration: none; border-color: var(--accent-line); }

.source-metric > strong {
  grid-column: 1 / -1;
  color: var(--accent-dark);
  font-size: 18px;
}

.source-metric span {
  display: grid;
  gap: 4px;
  color: var(--muted);
  font-size: 12px;
  font-weight: 800;
  text-transform: uppercase;
}

.source-metric b {
  color: var(--ink);
  font-size: 26px;
  line-height: 1;
}

.metric-card,
.stat {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: rgba(255, 255, 255, .88);
  padding: 16px;
}

.metric-card b,
.stat b {
  display: block;
  color: var(--accent-dark);
  font-size: 30px;
  line-height: 1;
  font-weight: 900;
}

.metric-card span,
.stat span {
  display: block;
  margin-top: 7px;
  color: var(--muted);
  font-size: 13px;
  font-weight: 700;
}

.portrait-wrap {
  position: relative;
  justify-self: end;
  max-width: 390px;
}

.portrait-wrap::before {
  content: "";
  position: absolute;
  inset: 18px -18px -18px 18px;
  border: 1px solid var(--accent-line);
  border-radius: var(--radius);
  background: var(--accent-soft);
}

.portrait {
  position: relative;
  width: 100%;
  aspect-ratio: 4 / 5;
  object-fit: cover;
  object-position: center 18%;
  border-radius: var(--radius);
  border: 1px solid var(--line);
  box-shadow: var(--shadow);
}

.section,
.grid,
.grid2,
.grid3 {
  max-width: var(--max);
  margin: 0 auto;
  padding: 56px 22px;
}

.section-tight { padding-top: 34px; }

.page-hero {
  max-width: var(--max);
  margin: 0 auto;
  padding: 64px 22px 36px;
  border-bottom: 1px solid var(--line);
}

.page-hero h1 {
  margin: 0 0 16px;
  font-size: clamp(40px, 5vw, 68px);
}

.page-hero p,
.lead {
  max-width: 900px;
  margin: 0 0 28px;
  color: var(--muted);
  font-size: 19px;
}

.section-title {
  margin: 0 0 20px;
  font-size: clamp(30px, 4vw, 50px);
}

.grid { display: grid; grid-template-columns: 1.1fr .9fr; gap: 22px; }
.grid2 { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 22px; }
.grid3 { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 22px; }

.card,
.tile,
.pub,
.resource-card,
.diploma {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

.card,
.tile,
.resource-body { padding: 24px; }

.project-card {
  padding: 0;
  overflow: hidden;
}

.project-card .body { padding: 24px; }

.project-visual {
  position: relative;
  min-height: 180px;
  border-bottom: 1px solid var(--line);
  background: var(--subtle);
  overflow: hidden;
}

.project-image {
  display: block;
  width: 100%;
  height: 180px;
  object-fit: cover;
}

.project-logo {
  position: absolute;
  left: 18px;
  bottom: 18px;
  max-width: min(240px, calc(100% - 36px));
  max-height: 66px;
  object-fit: contain;
  border: 1px solid rgba(221, 225, 231, .94);
  border-radius: var(--radius);
  background: rgba(255, 255, 255, .94);
  padding: 10px 12px;
  box-shadow: 0 12px 28px rgba(31, 38, 52, .12);
}

.tile-logo {
  float: right;
  max-width: 118px;
  max-height: 54px;
  object-fit: contain;
  margin: 0 0 14px 18px;
}

.card h2,
.tile h2,
.card h3,
.tile h3,
.resource-card h3 {
  margin: 0 0 12px;
  color: var(--accent-dark);
  line-height: 1.24;
}

.muted { color: var(--muted); }

.institution-mark {
  float: right;
  max-width: 82px;
  margin: 0 0 16px 20px;
  opacity: .86;
}

.chips {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 14px;
}

.chip,
.kind {
  display: inline-flex;
  align-items: center;
  border: 1px solid var(--accent-line);
  border-radius: 999px;
  background: var(--accent-soft);
  color: var(--accent-dark);
  padding: 5px 9px;
  font-size: 13px;
  font-weight: 800;
}

.timeline { display: grid; gap: 14px; }

.timeline-item {
  display: grid;
  grid-template-columns: 170px 1fr;
  gap: 22px;
  border-left: 3px solid var(--accent);
  padding: 4px 0 4px 18px;
}

.timeline-period { font-weight: 900; color: var(--accent-dark); }

.timeline-meta {
  display: grid;
  align-content: start;
  justify-items: start;
  gap: 10px;
}

.pubtools {
  display: flex;
  gap: 12px;
  align-items: center;
  flex-wrap: wrap;
  margin: 22px 0;
}

.input {
  flex: 1;
  min-width: 260px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: #fff;
  padding: 12px 15px;
  font-size: 15px;
  line-height: 1.2;
}

.publication-list { display: grid; gap: 10px; }

.publication-row {
  display: grid;
  grid-template-columns: 86px minmax(0, 1fr) 96px;
  gap: 16px;
  align-items: start;
  margin: 0;
  padding: 16px;
  box-shadow: none;
}

.pub-year {
  color: var(--accent-dark);
  font-size: 14px;
  font-weight: 900;
}

.pub h3 {
  margin: 0 0 7px;
  font-size: 17px;
  line-height: 1.35;
}

.pub .meta {
  color: var(--muted);
  font-size: 14px;
}

.pub-cites { text-align: right; }

.cit {
  display: inline-flex;
  justify-content: center;
  min-width: 58px;
  border: 1px solid var(--accent-line);
  border-radius: 999px;
  background: var(--accent-soft);
  color: var(--accent-dark);
  padding: 4px 8px;
  font-size: 12px;
  font-weight: 900;
}

.cit-empty {
  color: var(--muted);
  background: var(--subtle);
  border-color: var(--line);
}

.resource-grid,
.diploma-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
}

.resource-card {
  display: flex;
  flex-direction: column;
  gap: 0;
  overflow: hidden;
}

.repo-link { font-weight: 900; }

.card-links {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 16px;
}

.inline-link {
  display: inline-flex;
  align-items: center;
  width: fit-content;
  border-bottom: 2px solid var(--accent-line);
  color: var(--accent-dark);
  font-weight: 900;
}

.inline-link:hover {
  border-color: var(--accent);
  text-decoration: none;
}

.timeline-logo {
  width: 78px;
  height: 56px;
  object-fit: contain;
  margin: 0;
}

.timeline-logo[src$="chelgu-logo.jpg"] {
  width: 64px;
  height: 64px;
}

.edu-list,
.conference-list,
.resume-list {
  display: grid;
  gap: 16px;
}

.edu-item,
.conference-item,
.resume-item {
  display: grid;
  grid-template-columns: 96px 1fr;
  gap: 16px;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--line);
}

.award-item {
  grid-template-columns: 96px 180px 1fr;
  align-items: center;
}

.award-logo {
  width: 160px;
  height: 72px;
  object-fit: contain;
  justify-self: center;
}

.edu-item:last-child,
.conference-item:last-child,
.resume-item:last-child { border-bottom: 0; padding-bottom: 0; }

.edu-year,
.conference-year,
.resume-year {
  color: var(--accent-dark);
  font-weight: 900;
}

.metric-badges {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 6px;
}

.badge {
  display: inline-flex;
  align-items: center;
  border: 1px solid var(--accent-line);
  border-radius: 999px;
  background: var(--accent);
  color: #fff;
  padding: 4px 8px;
  font-size: 11px;
  font-weight: 900;
  line-height: 1.2;
}

.badge.light {
  background: var(--accent-soft);
  color: var(--accent-dark);
}

.pub-row {
  display: grid;
  grid-template-columns: 78px minmax(0, 1fr) minmax(160px, .24fr);
  gap: 18px;
  align-items: start;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: #fff;
  padding: 18px;
}

.pub-citation {
  color: var(--ink);
  font-size: 15px;
  line-height: 1.5;
}

.pub-citation a {
  color: var(--ink);
}

.pub-quality {
  display: grid;
  justify-items: end;
  gap: 10px;
}

.copy-citation {
  border: 1px solid var(--accent-line);
  border-radius: 999px;
  background: #fff;
  color: var(--accent-dark);
  padding: 8px 11px;
  font-size: 12px;
  font-weight: 900;
  cursor: pointer;
}

.copy-citation:hover { border-color: var(--accent); }

.select { max-width: 230px; }

.annual-chart {
  display: grid;
  gap: 10px;
}

.annual-row {
  display: grid;
  grid-template-columns: 64px 1fr 48px 92px;
  gap: 12px;
  align-items: center;
}

.annual-row span,
.annual-row b {
  color: var(--accent-dark);
  font-weight: 900;
}

.annual-row em {
  color: var(--muted);
  font-style: normal;
  font-size: 13px;
}

.media-grid {
  display: grid;
  gap: 18px;
}

.media-card {
  display: grid;
  grid-template-columns: 180px minmax(0, 1fr);
  gap: 20px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: #fff;
  box-shadow: var(--shadow);
  overflow: hidden;
}

.media-image {
  display: block;
  min-height: 180px;
  background: var(--accent-soft);
  border-right: 1px solid var(--line);
}

.media-image img {
  display: block;
  width: 100%;
  height: 100%;
  min-height: 180px;
  object-fit: cover;
}

.media-body { padding: 22px 22px 22px 0; }
.media-meta { color: var(--muted); font-size: 13px; font-weight: 900; }
.media-card h2 { margin: 7px 0 10px; color: var(--accent-dark); line-height: 1.25; }

.resource-head {
  display: grid;
  grid-template-columns: 34px 1fr;
  gap: 12px;
  align-items: start;
}

.resource-head img {
  width: 34px;
  height: 34px;
}

.resource-image {
  display: block;
  width: 100%;
  height: 150px;
  object-fit: cover;
  background: var(--subtle);
  border-bottom: 1px solid var(--line);
}

.resource-body {
  display: flex;
  flex: 1;
  flex-direction: column;
  gap: 12px;
}

.diploma { overflow: hidden; }

.diploma-preview {
  display: block;
  width: 100%;
  border: 0;
  padding: 0;
  background: #fff;
  cursor: zoom-in;
}

.diploma img {
  width: 100%;
  height: 230px;
  object-fit: cover;
  background: #fff;
  border-bottom: 1px solid var(--line);
}

.diploma-body { padding: 18px; }
.diploma-title { color: var(--accent-dark); font-weight: 900; line-height: 1.35; }
.diploma-meta { margin-top: 6px; color: var(--muted); font-size: 13px; }

.diploma-modal {
  position: fixed;
  inset: 0;
  z-index: 1000;
  display: grid;
  place-items: center;
  background: rgba(14, 17, 22, .72);
  padding: 22px;
}

.diploma-modal[hidden] { display: none; }

.diploma-modal-panel {
  width: min(940px, 100%);
  max-height: 92dvh;
  overflow: auto;
  border-radius: var(--radius);
  background: #fff;
  box-shadow: 0 24px 70px rgba(0, 0, 0, .28);
}

.diploma-modal-bar {
  position: sticky;
  top: 0;
  z-index: 1;
  display: flex;
  justify-content: space-between;
  gap: 16px;
  align-items: center;
  border-bottom: 1px solid var(--line);
  background: #fff;
  padding: 14px 16px;
}

.diploma-modal-bar button,
.diploma-modal-bar a {
  border: 1px solid var(--accent-line);
  border-radius: 999px;
  background: #fff;
  color: var(--accent-dark);
  padding: 8px 11px;
  font-size: 13px;
  font-weight: 900;
}

.diploma-modal-panel > img {
  display: block;
  width: 100%;
  height: auto;
  max-height: none;
  object-fit: contain;
}

.table-wrap {
  overflow-x: auto;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

table {
  width: 100%;
  min-width: 700px;
  border-collapse: collapse;
}

th,
td {
  padding: 13px 14px;
  border-bottom: 1px solid var(--line);
  text-align: left;
}

th {
  background: var(--subtle);
  color: var(--accent-dark);
  font-size: 13px;
  text-transform: uppercase;
  letter-spacing: 0;
}

.bar {
  height: 12px;
  border-radius: 999px;
  background: var(--accent-soft);
  overflow: hidden;
}

.bar span { display: block; height: 100%; background: var(--accent); }

.notice {
  background: var(--subtle);
  border: 1px solid var(--line);
  border-left: 4px solid var(--accent);
  border-radius: var(--radius);
  padding: 18px;
  color: #3e4651;
}

.project-intro {
  max-width: 960px;
  font-size: 18px;
  line-height: 1.65;
}

.projects-list-section { padding-top: 0; }

.hidden { display: none !important; }
.small { font-size: 14px; }

.footer {
  margin-top: 42px;
  background: #f8f9fb;
  color: var(--ink);
  border-top: 1px solid var(--line);
}

.footer-inner {
  max-width: var(--max);
  margin: 0 auto;
  padding: 36px 22px;
  display: flex;
  justify-content: space-between;
  gap: 24px;
  flex-wrap: wrap;
}

.footer a { color: var(--accent-dark); }

.social-links {
  display: flex;
  gap: 10px;
}

.social-links a {
  width: 40px;
  height: 40px;
  border: 1px solid var(--line);
  border-radius: 50%;
  display: grid;
  place-items: center;
  background: #fff;
  box-shadow: 0 8px 20px rgba(31, 38, 52, .06);
}

.social-links a:hover {
  border-color: var(--accent-line);
  text-decoration: none;
}

.social-links img,
.social-links svg {
  width: 22px;
  height: 22px;
}

@media (max-width: 1040px) {
  .top-inner { align-items: flex-start; flex-wrap: wrap; }
  .nav {
    order: 3;
    flex-basis: 100%;
    justify-content: flex-start;
  }
}

@media (max-width: 900px) {
  .hero-grid,
  .grid,
  .grid2,
  .grid3,
  .resource-grid,
  .diploma-grid {
    grid-template-columns: 1fr;
  }

  .pub-row,
  .media-card {
    grid-template-columns: 1fr;
  }

  .media-image {
    min-height: 130px;
    border-right: 0;
    border-bottom: 1px solid var(--line);
  }

  .media-body { padding: 18px; }

  .hero-grid {
    min-height: 0;
    padding: 36px 22px 42px;
  }

  .portrait-wrap {
    justify-self: start;
    max-width: 260px;
    order: 2;
  }

  .hero-copy { order: 1; }
  .timeline-item { grid-template-columns: 1fr; }
  .timeline-meta { gap: 8px; }
}

@media (max-width: 720px) {
  .top-inner {
    align-items: center;
    gap: 12px;
    padding: 11px 18px;
  }

  .nav-toggle {
    display: inline-flex;
    margin-left: auto;
  }

  .nav {
    display: none;
    flex-basis: 100%;
    gap: 10px 14px;
    padding: 10px 0 4px;
  }

  .top.is-open .nav { display: flex; }

  .nav a { font-size: 14px; }
  .contact-link { background: #fff; color: var(--accent-dark) !important; }

  .hero h1 { font-size: 42px; }
  .hero p { font-size: 17px; }

  .hero-metrics,
  .metric-strip,
  .stats,
  .source-metrics {
    grid-template-columns: 1fr;
  }

  .hero-id-list {
    grid-template-columns: 1fr;
  }

  .publication-row {
    grid-template-columns: 1fr;
    gap: 8px;
  }

  .pub-row,
  .edu-item,
  .conference-item,
  .resume-item,
  .annual-row {
    grid-template-columns: 1fr;
  }

  .award-logo {
    justify-self: start;
    width: 180px;
    max-width: 100%;
  }

  .pub-quality,
  .metric-badges {
    justify-items: start;
    justify-content: flex-start;
  }

  .pub-cites { text-align: left; }
  .card, .tile, .pub, .resource-body { padding: 18px; }
}

@media (max-width: 430px) {
  .brand-name { max-width: 210px; overflow: hidden; text-overflow: ellipsis; }
  .hero-grid { padding-top: 28px; }
  .hero h1 { font-size: 38px; }
  .hero-actions .btn { flex: 1 1 auto; }
}