:root {
  --bg: #ffffff;
  --panel: #ffffff;
  --line: #ece8f3;
  --line-strong: #dbd3ec;
  --text: #191625;
  --muted: #686176;
  --primary: #7d5ce8;
  --primary-dark: #6543d4;
  --primary-soft: rgba(125, 92, 232, 0.06);
  --primary-soft-2: rgba(125, 92, 232, 0.09);
  --shadow-sm: 0 8px 20px rgba(39, 27, 71, 0.028);
  --shadow-md: 0 14px 34px rgba(42, 25, 84, 0.055);
  --hero-photo-width: 236px;
  --radius-xl: 30px;
  --radius-lg: 18px;
  --radius-md: 16px;
  --sidebar-width: 160px;
  --content-width: 860px;
  --shell-width: 1180px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: "Inter", system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  color: var(--text);
  background: var(--bg);
}

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

strong {
  color: #322552;
}

h1,
h2,
h3 {
  margin: 0;
  letter-spacing: -0.035em;
}

p {
  margin: 0;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  background:
    radial-gradient(circle at 14% 8%, rgba(125, 92, 232, 0.024), transparent 18%),
    radial-gradient(circle at 84% 10%, rgba(125, 92, 232, 0.016), transparent 16%);
}

a {
  color: var(--primary-dark);
  text-decoration: none;
}

a:hover {
  color: var(--primary);
}

.site-wrap {
  position: relative;
  max-width: var(--shell-width);
  margin: 0 auto;
  padding: 52px 36px 84px;
}

.page-shell {
  display: grid;
  grid-template-columns: var(--sidebar-width) minmax(0, var(--content-width));
  justify-content: center;
  column-gap: 74px;
}

.sidebar {
  position: sticky;
  top: 58px;
  align-self: start;
}

.sidebar__inner {
  display: grid;
  gap: 20px;
}

.side-nav {
  display: grid;
  gap: 10px;
  padding-left: 12px;
  border-left: 1px solid var(--line);
}

.side-nav__link {
  position: relative;
  padding: 8px 0;
  color: var(--muted);
  font-size: 0.95rem;
  font-weight: 600;
  transition: color 0.22s ease, transform 0.22s ease;
}

.side-nav__link::before {
  content: "";
  position: absolute;
  left: -13px;
  top: 50%;
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: transparent;
  transform: translateY(-50%);
  transition: background 0.22s ease, transform 0.22s ease;
}

.side-nav__link:hover,
.side-nav__link.active {
  color: var(--primary-dark);
  transform: translateX(3px);
}

.side-nav__link:hover::before,
.side-nav__link.active::before {
  background: var(--primary);
  transform: translateY(-50%) scale(1.05);
}

.sidebar-note {
  max-width: 150px;
  color: var(--muted);
  font-size: 0.87rem;
  line-height: 1.85;
}

.content {
  width: 100%;
}

.section {
  margin-bottom: 72px;
}

#about.section--hero {
  margin-bottom: 50px;
}

#about .section-heading {
  margin-top: -4px;
  margin-bottom: 20px;
}

#publications.section {
  margin-top: 6px;
}

.section:last-of-type {
  margin-bottom: 34px;
}

.section--hero {
  margin-bottom: 42px;
}

.hero-intro {
  display: grid;
  grid-template-columns: minmax(0, 1fr) var(--hero-photo-width);
  align-items: stretch;
  column-gap: 42px;
  margin-bottom: 12px;
}

.hero-intro__text {
  display: flex;
  flex-direction: column;
  justify-content: center;
  min-height: 100%;
}

.hero-intro h1 {
  font-family: "Source Serif 4", Georgia, serif;
  font-size: clamp(2.62rem, 4.98vw, 3.94rem);
  line-height: 0.98;
  font-weight: 600;
}

.hero-intro__role {
  margin-top: 22px;
  color: #564f68;
  font-size: 1.03rem;
  line-height: 1.82;
}

.hero-intro__links {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 18px;
  margin-top: 14px;
  color: var(--muted);
  font-size: 0.92rem;
}


.hero-link {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  color: #5a4b7e;
  font-weight: 500;
}

.hero-link:hover {
  color: var(--primary-dark);
}

.hero-link__icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 15px;
  height: 15px;
  color: var(--primary);
  flex-shrink: 0;
}

.hero-link__icon svg {
  width: 100%;
  height: 100%;
  display: block;
}

.hero-portrait {
  justify-self: end;
  align-self: stretch;
}

.hero-portrait__frame {
  position: relative;
  width: var(--hero-photo-width);
  height: 100%;
  min-height: 228px;
  padding: 14px;
  display: flex;
  border-radius: 20px;
  border: 1px solid var(--line);
  background: #fff;
  box-shadow: var(--shadow-sm);
}

.hero-portrait__frame::after {
  content: "";
  position: absolute;
  inset: -12px 16px 16px -12px;
  border-radius: 28px;
  background: radial-gradient(circle at 50% 50%, rgba(125, 92, 232, 0.07), transparent 72%);
  z-index: -1;
}

.hero-portrait__image {
  width: 100%;
  height: 100%;
  object-fit: cover;
  border-radius: 12px;
  border: 1px solid var(--line-strong);
}

.section-heading {
  margin-bottom: 18px;
}

.section-heading h2 {
  font-family: "Source Serif 4", Georgia, serif;
  font-size: clamp(1.92rem, 3vw, 2.45rem);
  line-height: 1.08;
  font-weight: 700;
}

.about-panel,
.publication-card,
.timeline-item {
  position: relative;
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
}

.about-panel {
  padding: 26px 28px;
}

.about-panel p {
  color: #433a59;
  line-height: 1.88;
}

.about-panel p + p {
  margin-top: 14px;
}

.tag-list {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 18px;
}

.tag {
  display: inline-flex;
  align-items: center;
  padding: 7px 11px;
  border-radius: 999px;
  border: 1px solid var(--line);
  background: #fff;
  color: #554b6f;
  font-size: 0.87rem;
  font-weight: 600;
}

.publication-list,
.timeline-list {
  display: grid;
  gap: 15px;
}

.publication-card {
  padding: 22px 24px;
}

.publication-card__top {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 16px;
}

.publication-card__title {
  font-size: 1.08rem;
  line-height: 1.58;
}

.publication-card__venue {
  flex-shrink: 0;
  white-space: nowrap;
  padding: 6px 10px;
  border-radius: 999px;
  background: var(--primary-soft);
  color: var(--primary-dark);
  font-size: 0.8rem;
  font-weight: 700;
}

.publication-card__authors,
.publication-card__desc {
  color: var(--muted);
  line-height: 1.78;
}

.publication-card__authors {
  margin: 10px 0 8px;
}

.publication-card__links {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 16px;
}

.link-chip {
  display: inline-flex;
  align-items: center;
  padding: 8px 11px;
  border-radius: 999px;
  border: 1px solid var(--line);
  background: #fff;
  color: var(--primary-dark);
  font-size: 0.89rem;
  font-weight: 700;
  transition: transform 0.22s ease, border-color 0.22s ease, background 0.22s ease;
}

.link-chip:hover {
  transform: translateY(-1px);
  border-color: var(--line-strong);
  background: #fcfaff;
}

.timeline-item {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 22px;
  padding: 20px 22px;
}

.timeline-item__main h3 {
  font-size: 1.03rem;
  margin-bottom: 6px;
}

.timeline-item__main p {
  color: var(--muted);
  line-height: 1.74;
}

.timeline-item__meta {
  flex-shrink: 0;
  white-space: nowrap;
  color: var(--primary-dark);
  font-size: 0.93rem;
  font-weight: 700;
  padding-top: 2px;
}

.hover-card {
  transition: transform 0.24s ease, box-shadow 0.24s ease, border-color 0.24s ease;
}

.hover-card::after {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: inherit;
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.65);
  pointer-events: none;
}

.hover-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
  border-color: var(--line-strong);
}

.footer {
  padding-top: 2px;
  color: var(--muted);
  font-size: 0.94rem;
}

.reveal {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity 0.65s ease, transform 0.65s ease;
}

.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

.back-to-top {
  position: fixed;
  right: 24px;
  bottom: 24px;
  width: 46px;
  height: 46px;
  border: 1px solid var(--line-strong);
  border-radius: 50%;
  background: #fff;
  color: var(--primary-dark);
  font-size: 1.1rem;
  box-shadow: var(--shadow-sm);
  cursor: pointer;
  opacity: 0;
  visibility: hidden;
  transform: translateY(10px);
  transition: opacity 0.24s ease, visibility 0.24s ease, transform 0.24s ease;
}

.back-to-top.show {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

@media (max-width: 1080px) {
  .site-wrap {
    padding: 30px 24px 68px;
  }

  .page-shell {
    grid-template-columns: 1fr;
    row-gap: 26px;
  }

  .sidebar {
    position: relative;
    top: 0;
  }

  .sidebar__inner {
    grid-template-columns: auto 1fr;
    align-items: start;
    column-gap: 18px;
  }

  .side-nav {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    border-left: none;
    border-top: 1px solid var(--line);
    padding-top: 12px;
    padding-left: 0;
  }

  .side-nav__link::before {
    display: none;
  }

  .sidebar-note {
    grid-column: 1 / -1;
    max-width: none;
  }

  .hero-intro {
    grid-template-columns: minmax(0, 1fr) 220px;
    column-gap: 28px;
  }

  .hero-portrait__frame {
    width: 220px;
    min-height: 220px;
  }
}

@media (max-width: 760px) {
  .site-wrap {
    padding: 22px 16px 60px;
  }

  .hero-intro,
  .publication-card__top,
  .timeline-item {
    grid-template-columns: 1fr;
    flex-direction: column;
  }

  .hero-portrait {
    justify-self: start;
    align-self: start;
    margin-top: 18px;
  }

  .section {
    margin-bottom: 52px;
  }

  .hero-intro h1 {
    font-size: clamp(2.7rem, 12vw, 3.7rem);
  }

  .section-heading h2 {
    font-size: clamp(1.9rem, 8vw, 2.35rem);
  }

  .side-nav {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 560px) {
  .about-panel,
  .publication-card,
  .timeline-item {
    padding-left: 16px;
    padding-right: 16px;
  }

  .hero-intro__links {
    gap: 14px;
  }

  .hero-portrait__frame {
    width: 180px;
    min-height: 180px;
    padding: 10px;
  }
}