:root {
  --ink: #152033;
  --text: #2a3344;
  --muted: #5c677a;
  --line: rgba(21, 32, 51, 0.12);
  --accent: #0b6b6e;
  --accent-hover: #085456;
  --surface: rgba(255, 255, 255, 0.62);
  --bg-top: #e8eef5;
  --bg-mid: #f3f1ec;
  --bg-bottom: #dfe8e7;
  --content: 46rem;
  --max: var(--content);
  --wide: var(--content);
  --radius: 2px;
  --font-display: "Literata", "Iowan Old Style", "Palatino Linotype", serif;
  --font-body: "IBM Plex Sans", "Helvetica Neue", sans-serif;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100vh;
  color: var(--text);
  font-family: var(--font-body);
  font-size: 1.05rem;
  line-height: 1.65;
  background:
    radial-gradient(ellipse 80% 50% at 10% 0%, rgba(11, 107, 110, 0.08), transparent 55%),
    radial-gradient(ellipse 70% 45% at 90% 10%, rgba(45, 74, 120, 0.1), transparent 50%),
    linear-gradient(165deg, var(--bg-top) 0%, var(--bg-mid) 48%, var(--bg-bottom) 100%);
  background-attachment: fixed;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: -1;
  opacity: 0.35;
  background-image:
    linear-gradient(rgba(21, 32, 51, 0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(21, 32, 51, 0.03) 1px, transparent 1px);
  background-size: 48px 48px;
  mask-image: linear-gradient(to bottom, black 0%, transparent 85%);
}

a {
  color: var(--accent);
  text-underline-offset: 0.18em;
  transition: color 180ms ease;
}

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

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

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  backdrop-filter: blur(10px);
  background: rgba(243, 241, 236, 0.78);
  border-bottom: 1px solid var(--line);
}

.site-header__inner,
.site-main,
.site-footer__inner {
  width: min(100% - 2.5rem, var(--content));
  margin-inline: auto;
}

.site-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  min-height: 3.75rem;
}

.site-mark {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 1.05rem;
  letter-spacing: -0.01em;
  color: var(--ink);
  text-decoration: none;
}

.site-mark:hover {
  color: var(--ink);
}

.site-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 0.15rem 1.1rem;
  justify-content: flex-end;
}

.site-nav a {
  position: relative;
  color: var(--muted);
  text-decoration: none;
  font-size: 0.95rem;
  font-weight: 500;
  padding: 0.2rem 0;
}

.site-nav a::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 100%;
  height: 1px;
  background: var(--accent);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 220ms ease;
}

.site-nav a:hover,
.site-nav a[aria-current="page"] {
  color: var(--ink);
}

.site-nav a:hover::after,
.site-nav a[aria-current="page"]::after {
  transform: scaleX(1);
}

.site-main {
  padding: 0 0 4.5rem;
}

.hero {
  min-height: calc(100vh - 3.75rem);
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: 3.5rem 0 3rem;
  max-width: none;
  width: 100%;
}

.hero__name {
  margin: 0 0 0.85rem;
  font-family: var(--font-display);
  font-size: clamp(2.6rem, 6vw, 3.75rem);
  font-weight: 650;
  line-height: 1.08;
  letter-spacing: -0.03em;
  color: var(--ink);
}

.hero__role {
  margin: 0 0 1rem;
  font-size: clamp(1.15rem, 2.4vw, 1.35rem);
  font-weight: 500;
  color: var(--ink);
  line-height: 1.35;
}

.hero__lede {
  margin: 0 0 1.75rem;
  color: var(--muted);
  max-width: 36rem;
}

.cta-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem 0.9rem;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.7rem 1.15rem;
  border-radius: var(--radius);
  font-weight: 560;
  font-size: 0.95rem;
  text-decoration: none;
  border: 1px solid transparent;
  transition: background 180ms ease, color 180ms ease, border-color 180ms ease, transform 180ms ease;
}

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

.btn--primary {
  background: var(--accent);
  color: #f7fbfb;
}

.btn--primary:hover {
  background: var(--accent-hover);
  color: #fff;
}

.btn--ghost {
  background: transparent;
  color: var(--ink);
  border-color: rgba(21, 32, 51, 0.22);
}

.btn--ghost:hover {
  border-color: var(--accent);
  color: var(--accent-hover);
}

.section,
.section--wide {
  padding: 2.75rem 0 0;
  max-width: none;
  width: 100%;
}

.section__title {
  margin: 0 0 0.85rem;
  font-family: var(--font-display);
  font-size: 1.65rem;
  font-weight: 650;
  letter-spacing: -0.02em;
  color: var(--ink);
}

.section__intro {
  margin: 0 0 1.5rem;
  color: var(--muted);
}

.about {
  display: grid;
  gap: 1.75rem;
  align-items: start;
}

@media (min-width: 720px) {
  .about {
    grid-template-columns: 11.5rem 1fr;
    gap: 2.25rem;
  }
}

.about__photo {
  width: 100%;
  max-width: 11.5rem;
  aspect-ratio: 2 / 3;
  object-fit: cover;
  object-position: center top;
  border-radius: var(--radius);
  filter: saturate(0.92) contrast(1.02);
}

.about__copy p {
  margin: 0 0 1rem;
}

.about__copy p:last-child {
  margin-bottom: 0;
}

.note {
  margin: 0;
  padding: 0.9rem 0 0;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 0.98rem;
}

.paper {
  padding: 1.35rem 0;
  border-top: 1px solid var(--line);
}

.paper:first-of-type {
  border-top: 0;
  padding-top: 0.25rem;
}

.paper__label {
  margin: 0 0 0.35rem;
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--accent);
}

.paper__title {
  margin: 0 0 0.35rem;
  font-family: var(--font-display);
  font-size: 1.2rem;
  font-weight: 650;
  line-height: 1.3;
  color: var(--ink);
}

.paper__meta {
  margin: 0 0 0.75rem;
  color: var(--muted);
  font-size: 0.95rem;
}

.paper__status {
  font-weight: 600;
  color: var(--accent);
}

.paper__prize {
  font-weight: 600;
  color: var(--accent);
}


.paper__links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.55rem 1rem;
  margin: 0 0 0.85rem;
  font-size: 0.95rem;
}

.paper__abstract-details {
  margin: 0 0 0.75rem;
}

.paper__abstract-details > summary {
  cursor: pointer;
  list-style: none;
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  font-size: 0.95rem;
  font-weight: 560;
  color: var(--accent);
  user-select: none;
}

.paper__abstract-details > summary::-webkit-details-marker {
  display: none;
}

.paper__abstract-details > summary::before {
  content: "";
  width: 0.4rem;
  height: 0.4rem;
  border-right: 1.5px solid currentColor;
  border-bottom: 1.5px solid currentColor;
  transform: rotate(-45deg);
  transition: transform 180ms ease;
}

.paper__abstract-details[open] > summary::before {
  transform: rotate(45deg);
}

.paper__abstract-details > summary:hover {
  color: var(--accent-hover);
}

.paper__abstract {
  margin: 0.65rem 0 0;
  color: var(--text);
}

.paper__presented {
  margin: 0;
  color: var(--muted);
  font-size: 0.92rem;
}

.list-block {
  margin: 0 0 1.75rem;
}

.list-block h3 {
  margin: 0 0 0.55rem;
  font-family: var(--font-display);
  font-size: 1.15rem;
  color: var(--ink);
}

.list-block ul,
.list-block ol {
  margin: 0;
  padding-left: 1.15rem;
}

.list-block li {
  margin: 0.35rem 0;
}

.list-block li ul,
.list-block li ol {
  margin-top: 0.25rem;
}

.teach-course {
  margin: 0 0 1.35rem;
}

.teach-course h3 {
  margin: 0 0 0.35rem;
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--ink);
}

.teach-course ul {
  margin: 0;
  padding-left: 1.15rem;
  color: var(--muted);
}

.contact-line {
  font-size: 1.15rem;
}

.site-footer {
  border-top: 1px solid var(--line);
  padding: 1.5rem 0 2rem;
  color: var(--muted);
  font-size: 0.9rem;
}

.site-footer__inner {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem 1.25rem;
  justify-content: space-between;
}

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

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

/* Motions */
.reveal,
.hero > * {
  opacity: 0;
  transform: translateY(0.7rem);
  animation: rise 700ms cubic-bezier(0.22, 1, 0.36, 1) forwards;
}

.hero > *:nth-child(1) { animation-delay: 40ms; }
.hero > *:nth-child(2) { animation-delay: 140ms; }
.hero > *:nth-child(3) { animation-delay: 240ms; }
.hero > *:nth-child(4) { animation-delay: 340ms; }

.reveal {
  animation: none;
  transition: opacity 650ms ease, transform 650ms ease;
}

.reveal.is-visible {
  opacity: 1;
  transform: none;
}

@keyframes rise {
  to {
    opacity: 1;
    transform: none;
  }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .reveal,
  .hero > * {
    opacity: 1;
    transform: none;
    animation: none;
    transition: none;
  }
  .btn:hover { transform: none; }
  .site-nav a::after { transition: none; }
}

@media (max-width: 560px) {
  .site-header__inner {
    flex-direction: column;
    align-items: flex-start;
    padding: 0.85rem 0;
    min-height: 0;
  }

  .site-nav {
    justify-content: flex-start;
  }

  .hero {
    min-height: auto;
    padding-top: 2.25rem;
  }
}