:root {
  --ink: #0d0d0d;
  --paper: #ffffff;
  --mist: #fafafa;
  --line: rgba(13, 13, 13, 0.1);
  --line-strong: rgba(13, 13, 13, 0.18);
  --muted: #666666;
  --soft: #888888;
  --accent: #18e299;
  --accent-deep: #0fa76e;
  --accent-wash: #d4fae8;
  --info: #3772cf;
  --warn: #c37d0d;
  --shadow-soft: 0 16px 48px rgba(13, 13, 13, 0.06);
  --shadow-card: 0 10px 30px rgba(13, 13, 13, 0.04);
  --sans: "Inter", system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --mono: "IBM Plex Mono", ui-monospace, SFMono-Regular, Menlo, monospace;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.65;
}

img {
  display: block;
  max-width: 100%;
}

a {
  color: inherit;
}

a:focus-visible,
button:focus-visible {
  outline: 2px solid var(--accent-deep);
  outline-offset: 2px;
}

.shell {
  width: min(1180px, calc(100% - 40px));
  margin: 0 auto;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 30;
  border-bottom: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.88);
  backdrop-filter: blur(18px);
}

.nav {
  min-height: 68px;
  display: grid;
  grid-template-columns: auto 1fr auto;
  gap: 24px;
  align-items: center;
}

.brand,
.brand:visited {
  text-decoration: none;
  font-family: var(--mono);
  font-size: 14px;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.nav-links {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 20px;
}

.nav-links a,
.nav-action,
.nav-action:visited {
  text-decoration: none;
  color: var(--muted);
  font-size: 14px;
  font-weight: 500;
}

.nav-links a:hover,
.nav-action:hover {
  color: var(--ink);
}

.hero {
  padding: 108px 0 32px;
  color: var(--ink);
  background:
    linear-gradient(180deg, rgba(212, 250, 232, 0.42) 0%, rgba(255, 255, 255, 0.96) 48%, rgba(255, 255, 255, 1) 100%);
  border-bottom: 1px solid var(--line);
}

.hero-layout {
  display: grid;
  grid-template-columns: minmax(0, 1.45fr) minmax(280px, 360px);
  gap: 24px;
  align-items: end;
}

.hero-main {
  max-width: 760px;
}

.section-label,
.summary-kicker,
.edu-type,
.info-kicker,
.pub-badge,
.exp-date,
.exp-place,
.fact-term {
  font-family: var(--mono);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.hero h1 {
  margin: 0;
  font-size: 60px;
  line-height: 1.02;
  letter-spacing: -0.05em;
}

.hero-subtitle {
  margin: 14px 0 0;
  font-size: 18px;
  color: var(--ink);
}

.hero-copy {
  margin: 18px 0 0;
  max-width: 640px;
  font-size: 18px;
  color: var(--muted);
}

.hero-copy + .hero-copy {
  margin-top: 14px;
}

.hero-actions,
.contact-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 28px;
}

.button,
.button:visited {
  min-height: 44px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0 18px;
  border-radius: 8px;
  border: 1px solid transparent;
  font-size: 15px;
  font-weight: 600;
  text-decoration: none;
  transition:
    transform 120ms ease,
    border-color 120ms ease,
    background-color 120ms ease;
}

.button:hover {
  transform: translateY(-1px);
}

.button-primary {
  background: var(--accent);
  border-color: var(--accent);
  color: var(--ink);
}

.button-primary:hover {
  background: #21ef9f;
  border-color: #21ef9f;
}

.button-secondary {
  background: var(--paper);
  border-color: var(--line-strong);
  color: var(--ink);
}

.button-secondary:hover {
  background: var(--mist);
}

.hero-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  list-style: none;
  margin: 28px 0 0;
  padding: 0;
}

.hero-tags li {
  padding: 8px 10px;
  border-radius: 8px;
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.9);
  font-size: 13px;
  font-weight: 500;
}

.hero-side {
  padding: 24px;
  border-radius: 8px;
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.94);
  box-shadow: var(--shadow-card);
}

.hero-portrait {
  margin: 0 0 22px;
}

.hero-portrait img {
  width: 100%;
  aspect-ratio: 4 / 5;
  object-fit: cover;
  object-position: center top;
  border-radius: 8px;
  border: 1px solid var(--line);
}

.hero-side p {
  margin: 0;
}

.hero-side-block + .hero-side-block {
  margin-top: 22px;
  padding-top: 22px;
  border-top: 1px solid var(--line);
}

.hero-side-label {
  margin: 0 0 10px;
  color: var(--accent-deep);
  font-family: var(--mono);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.hero-side-block p + p,
.hero-side-list li {
  color: var(--muted);
}

.hero-side-block p + p {
  margin-top: 10px;
}

.hero-side-list {
  margin: 0;
  padding-left: 18px;
}

.hero-side-list li + li {
  margin-top: 10px;
}

.hero-facts {
  display: grid;
  gap: 16px;
}

.summary-band {
  padding: 18px 0 0;
}

.summary-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
}

.summary-item {
  padding: 20px 22px;
  border-radius: 8px;
  border: 1px solid var(--line);
  background: var(--paper);
  box-shadow: var(--shadow-card);
}

.summary-kicker {
  margin: 0 0 10px;
  color: var(--soft);
}

.summary-item h2 {
  margin: 0;
  font-size: 22px;
  line-height: 1.15;
}

.summary-item p:last-child {
  margin: 10px 0 0;
  color: var(--muted);
}

.band {
  padding: 76px 0;
}

.news-list {
  display: grid;
  gap: 18px;
}

.news-item {
  display: grid;
  grid-template-columns: 180px minmax(0, 1fr);
  gap: 22px;
  padding-top: 18px;
  border-top: 1px solid var(--line);
}

.news-item:first-child {
  padding-top: 0;
  border-top: none;
}

.news-date {
  color: var(--accent-deep);
  font-family: var(--mono);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.news-body h3 {
  margin: 0;
  font-size: 22px;
  line-height: 1.25;
}

.news-body p {
  margin: 12px 0 0;
  color: var(--muted);
}

.surface {
  background: var(--mist);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.education-grid,
.contact-grid {
  display: grid;
  gap: 28px;
}

.section-label {
  margin: 0 0 12px;
  color: var(--soft);
}

.section-head h2,
.contact-grid h2 {
  margin: 0;
  font-size: 34px;
  line-height: 1.12;
  letter-spacing: -0.03em;
}

.contact-copy,
.education-card p:last-child,
.pub-note {
  color: var(--muted);
}

.fact-term {
  display: block;
  margin-bottom: 6px;
  color: var(--soft);
}

.fact-value {
  display: block;
  font-size: 15px;
  font-weight: 500;
}

.section-head {
  margin-bottom: 28px;
}

.education-grid {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.education-card,
.info-card {
  padding: 24px;
  border-radius: 8px;
  border: 1px solid var(--line);
  background: var(--paper);
  box-shadow: var(--shadow-card);
}

.edu-type,
.info-kicker {
  margin: 0 0 12px;
  color: var(--accent-deep);
}

.education-card h3,
.info-card h3,
.experience-body h3 {
  margin: 0;
  font-size: 22px;
  line-height: 1.25;
}

.edu-meta {
  margin: 10px 0 0;
  color: var(--soft);
  font-size: 14px;
}

.experience-list {
  display: grid;
  gap: 18px;
}

.experience-item {
  display: grid;
  grid-template-columns: 220px minmax(0, 1fr);
  gap: 24px;
  padding-top: 22px;
  border-top: 1px solid var(--line);
}

.experience-item:first-child {
  padding-top: 0;
  border-top: none;
}

.experience-rail {
  display: grid;
  gap: 8px;
  align-content: start;
}

.exp-date {
  margin: 0;
  color: var(--warn);
}

.exp-place {
  margin: 0;
  color: var(--soft);
}

.experience-body ul,
.info-card ul {
  margin: 16px 0 0;
  padding-left: 18px;
}

.experience-body li,
.info-card li {
  margin-top: 10px;
  color: var(--muted);
}

.publication-list {
  display: grid;
  gap: 16px;
}

.project-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
}

.project-card {
  padding: 24px;
  border-radius: 8px;
  border: 1px solid var(--line);
  background: var(--paper);
  box-shadow: var(--shadow-card);
}

.project-kicker {
  margin: 0 0 12px;
  color: var(--accent-deep);
  font-family: var(--mono);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.project-card h3 {
  margin: 0;
  font-size: 22px;
  line-height: 1.25;
}

.project-card p:last-of-type {
  margin: 12px 0 0;
  color: var(--muted);
}

.project-links {
  display: flex;
  flex-wrap: wrap;
  gap: 18px;
  margin-top: 16px;
}

.project-links a {
  color: var(--info);
  font-weight: 600;
  text-decoration: none;
}

.project-links a:hover {
  color: #1f57b4;
}

.publication {
  display: grid;
  grid-template-columns: 180px minmax(0, 1fr);
  gap: 22px;
  padding: 24px;
  border-radius: 8px;
  border: 1px solid var(--line);
  background: var(--paper);
}

.pub-badge {
  align-self: start;
  width: fit-content;
  padding: 7px 10px;
  border-radius: 8px;
  background: var(--accent-wash);
  color: var(--accent-deep);
}

.pub-main h3 {
  margin: 0;
  font-size: 22px;
  line-height: 1.25;
}

.pub-authors {
  margin: 12px 0 0;
  color: var(--muted);
}

.pub-links {
  display: flex;
  flex-wrap: wrap;
  gap: 18px;
  margin-top: 16px;
}

.pub-links a {
  color: var(--info);
  text-decoration: none;
  font-weight: 600;
}

.pub-links a:hover,
.site-footer a:hover {
  color: #1f57b4;
}

.pub-note {
  margin: 18px 0 0;
  font-size: 14px;
}

.info-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
}

.contact-band {
  background: linear-gradient(180deg, rgba(212, 250, 232, 0.5) 0%, rgba(255, 255, 255, 1) 100%);
  border-top: 1px solid var(--line);
}

.contact-grid {
  grid-template-columns: minmax(0, 1fr) auto;
  align-items: end;
}

.contact-band .button-secondary {
  background: var(--paper);
  border-color: var(--line-strong);
  color: var(--ink);
}

.site-footer {
  padding: 28px 0 40px;
  border-top: 1px solid var(--line);
}

.footer-grid {
  display: flex;
  justify-content: space-between;
  gap: 16px 32px;
  flex-wrap: wrap;
}

.footer-grid p {
  margin: 0;
  color: var(--muted);
  font-size: 14px;
}

.site-footer a {
  text-decoration: none;
  color: var(--info);
}

@media (max-width: 1040px) {
  .hero-layout,
  .summary-grid,
  .education-grid,
  .project-grid,
  .info-grid,
  .contact-grid {
    grid-template-columns: 1fr;
  }

  .experience-item,
  .news-item,
  .publication {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 780px) {
  .shell {
    width: min(100% - 24px, 1180px);
  }

  .nav {
    grid-template-columns: 1fr auto;
    gap: 12px 18px;
    padding: 12px 0;
  }

  .nav-links {
    grid-column: 1 / -1;
    justify-content: flex-start;
    gap: 14px;
    padding-bottom: 4px;
  }

  .hero {
    padding: 96px 0 24px;
  }

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

  .hero-subtitle,
  .hero-copy {
    font-size: 16px;
  }

  .hero-side {
    padding: 20px;
  }

  .summary-item h2,
  .education-card h3,
  .info-card h3,
  .experience-body h3,
  .pub-main h3 {
    font-size: 20px;
  }

  .section-head h2,
  .contact-grid h2 {
    font-size: 28px;
  }

  .band {
    padding: 60px 0;
  }
}