:root {
  --ink: #edf2ff;
  --muted: #9ba7ba;
  --accent: #65d6b3;
  --accent-bright: #9ce8d1;
  --accent-soft: #c8e986;
  --line: rgba(197, 213, 240, .13);
  --shadow: 0 24px 70px rgba(0, 0, 0, .38);
  --shell: min(1160px, calc(100% - 40px));
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: 100px;
}

body {
  margin: 0;
  color: var(--ink);
  background: #07090e;
  font-family: "Manrope", system-ui, sans-serif;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

body::before {
  position: fixed;
  z-index: -2;
  inset: 0;
  background:
    linear-gradient(180deg, rgba(5, 7, 12, .9), rgba(7, 10, 17, .95) 58%, #07090e 100%),
    url("../images/abstract-network-background.png") center top / cover no-repeat;
  background-blend-mode: multiply;
  content: "";
}

body::after {
  position: fixed;
  z-index: -1;
  inset: 0;
  pointer-events: none;
  background-image: radial-gradient(rgba(157, 185, 242, .07) .65px, transparent .65px);
  background-size: 18px 18px;
  mask-image: linear-gradient(to bottom, #000, transparent 62%);
  content: "";
}

a {
  color: inherit;
  text-decoration: none;
}

button {
  font: inherit;
}

.shell {
  width: var(--shell);
  margin-inline: auto;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.skip-link {
  position: fixed;
  z-index: 100;
  top: 10px;
  left: 10px;
  padding: 10px 16px;
  border-radius: 10px;
  color: #07101f;
  background: var(--ink);
  transform: translateY(-150%);
}

.skip-link:focus {
  transform: none;
}

.site-header {
  position: sticky;
  z-index: 50;
  top: 0;
  padding: 10px 0;
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 54px;
  padding: 6px 8px 6px 11px;
  border: 1px solid rgba(197, 213, 240, .12);
  border-radius: 18px;
  background: rgba(9, 13, 22, .82);
  box-shadow: 0 12px 38px rgba(0, 0, 0, .26);
  backdrop-filter: blur(20px) saturate(145%);
}

.brand {
  display: inline-flex;
  gap: 11px;
  align-items: center;
  font-weight: 800;
  letter-spacing: -.02em;
}

.brand-mark {
  display: grid;
  width: 36px;
  aspect-ratio: 1;
  place-items: center;
  border-radius: 11px;
  color: #07101f;
  background: linear-gradient(135deg, #65d6b3, #b4f0dd);
  box-shadow: 0 8px 20px rgba(45, 170, 135, .22);
  font-family: "Space Grotesk", sans-serif;
}

.nav-links {
  display: flex;
  gap: 7px;
  align-items: center;
}

.nav-links a {
  padding: 8px 12px;
  border-radius: 10px;
  color: #a9b3c5;
  font-size: .87rem;
  font-weight: 700;
  transition: color .2s ease, background .2s ease, transform .2s ease;
}

.nav-links a:hover,
.nav-links a.active {
  color: var(--accent);
  background: rgba(101, 214, 179, .1);
}

.nav-links a:hover {
  transform: translateY(-2px);
}

.nav-links .nav-contact {
  padding-inline: 18px;
  color: #07101f;
  background: var(--accent);
}

.nav-links .nav-contact:hover {
  color: #07101f;
  background: #9ce8d1;
}

.nav-toggle {
  display: none;
}

.hero {
  position: relative;
  padding-right: 230px;
  padding-block: 26px 18px;
}

.eyebrow,
.kicker {
  margin: 0 0 12px;
  color: var(--accent);
  font-size: .77rem;
  font-weight: 800;
  letter-spacing: .13em;
  text-transform: uppercase;
}

.eyebrow {
  display: flex;
  gap: 9px;
  align-items: center;
}

.eyebrow span {
  width: 26px;
  height: 2px;
  border-radius: 4px;
  background: linear-gradient(90deg, var(--accent), var(--accent-soft));
}

h2 {
  margin: 0;
  font-family: "Space Grotesk", sans-serif;
  line-height: 1.02;
  letter-spacing: -.055em;
}

.hero-intro {
  max-width: 720px;
  margin: 12px 0 0;
  color: var(--muted);
  font-size: clamp(.92rem, 1.5vw, 1.08rem);
}

.hero-intro a {
  color: var(--accent);
  font-weight: 700;
  text-decoration: underline;
  text-decoration-color: rgba(101, 214, 179, .3);
  text-decoration-thickness: 1px;
  text-underline-offset: 3px;
  transition: color .2s ease, text-decoration-color .2s ease;
}

.hero-intro a:hover {
  color: var(--accent-bright);
  text-decoration-color: currentColor;
}

.portrait-cv {
  position: relative;
  display: inline-flex;
  width: 100%;
  gap: 20px;
  align-items: center;
  justify-content: space-between;
  margin-top: 12px;
  padding: 9px 11px;
  border: 1px solid rgba(101, 214, 179, .18);
  border-radius: 13px;
  color: var(--accent);
  background: rgba(15, 21, 34, .86);
  box-shadow: 0 7px 18px rgba(0, 0, 0, .2);
  font-size: .73rem;
  font-weight: 800;
  opacity: .86;
  transition: color .22s ease, background .22s ease, box-shadow .22s ease, opacity .22s ease, transform .22s ease;
  backdrop-filter: blur(10px);
}

.portrait-cv span {
  font-size: 1.1rem;
  transition: transform .22s ease;
}

.portrait-cv:hover {
  color: var(--accent-bright);
  background: rgba(24, 32, 51, .96);
  box-shadow: 0 9px 22px rgba(0, 0, 0, .28);
  opacity: 1;
  transform: translateY(-3px) scale(1.025);
}

.portrait-cv:hover span {
  transform: translate(2px, -2px);
}

.portrait-cv:active {
  transform: scale(.98);
}

.text-link {
  border-bottom: 1px solid rgba(101, 214, 179, .3);
  color: var(--accent);
  font-size: .83rem;
  font-weight: 800;
  transition: border-color .2s ease;
}

.text-link:hover {
  border-color: var(--accent);
}

.portrait-wrap {
  position: absolute;
  top: 26px;
  right: 0;
  width: min(100%, 165px);
}

.portrait-aura {
  position: absolute;
  inset: -18px;
  border-radius: 60px;
  background: linear-gradient(150deg, rgba(61, 170, 137, .38), rgba(91, 151, 119, .22), rgba(44, 112, 95, .3));
  filter: blur(22px);
  opacity: .72;
  transform: rotate(4deg);
}

.portrait-card {
  position: relative;
  padding: 10px;
  border: 1px solid rgba(197, 213, 240, .2);
  border-radius: 54px 28px 54px 28px;
  background: rgba(12, 17, 28, .82);
  box-shadow: var(--shadow);
  transform: rotate(1.5deg);
  transition: transform .35s cubic-bezier(.2, .8, .2, 1);
  backdrop-filter: blur(14px);
}

.portrait-card:hover {
  transform: rotate(0) scale(1.025);
}

.portrait-card img {
  display: block;
  width: 100%;
  max-height: 200px;
  border-radius: 45px 21px 45px 21px;
  object-fit: cover;
  object-position: center 33%;
}

.section {
  padding-block: 42px;
}

.section-heading {
  max-width: 720px;
  margin-bottom: 20px;
}

.section-heading h2 {
  font-size: clamp(2.15rem, 3.5vw, 3.25rem);
}

.section-heading > p:last-child {
  max-width: 570px;
  margin: 16px 0 0;
  color: var(--muted);
  font-size: .96rem;
}

.heading-row {
  display: flex;
  max-width: none;
  align-items: end;
  justify-content: space-between;
}

.research-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}

.research-card {
  padding: 17px 0 2px;
  border-top: 1px solid var(--line);
  transition: border-color .2s ease, transform .2s ease;
}

.research-card:hover {
  border-color: var(--accent);
  transform: translateY(-2px);
}

.research-card-heading {
  display: flex;
  flex-direction: column;
}

.research-card small {
  color: var(--muted);
  font-size: .66rem;
  font-weight: 700;
  letter-spacing: .08em;
  text-transform: uppercase;
}

.research-card p {
  margin: 8px 0 0;
  padding: 0;
  color: var(--muted);
  font-size: .85rem;
}

.publication-list {
  border-top: 1px solid var(--line);
}

.publication {
  padding-inline: 10px;
  border-bottom: 1px solid var(--line);
  transition: background .25s ease, border-radius .25s ease, padding .25s ease;
}

.publication:hover {
  padding-inline: 22px;
  border-radius: 18px;
  background: rgba(101, 214, 179, .055);
}

.publication-main {
  display: grid;
  grid-template-columns: 75px 1fr auto;
  gap: 24px;
  align-items: center;
  padding: 15px 0 7px;
}

.publication-main > span:nth-child(2) {
  display: flex;
  flex-direction: column;
}

.publication-year {
  color: var(--accent);
  font: 600 1rem "Space Grotesk", sans-serif;
}

.publication small {
  margin-bottom: 5px;
  color: var(--muted);
  font-size: .67rem;
  font-weight: 700;
  letter-spacing: .08em;
  text-transform: uppercase;
}

.publication strong {
  font: 600 clamp(1.03rem, 2vw, 1.35rem) "Space Grotesk", sans-serif;
  letter-spacing: -.02em;
}

.publication-arrow {
  display: grid;
  width: 42px;
  aspect-ratio: 1;
  place-items: center;
  border-radius: 50%;
  color: var(--accent);
  background: rgba(101, 214, 179, .1);
  transition: color .2s ease, background .2s ease, transform .2s ease;
}

.publication:hover .publication-arrow {
  color: #07101f;
  background: var(--accent);
  transform: scale(1.14) rotate(5deg);
}

.publication-authors {
  margin: 0 52px 13px 109px;
  color: var(--muted);
  font-size: .8rem;
}

.publication-authors strong {
  margin-right: 7px;
  color: var(--accent);
  font: 800 .7rem "Manrope", sans-serif;
  letter-spacing: .07em;
  text-transform: uppercase;
}

.publication-authors a {
  color: var(--accent);
  font-weight: 700;
  text-decoration: underline;
  text-decoration-color: rgba(101, 214, 179, .28);
  text-underline-offset: 2px;
}

.publication-authors a:hover {
  text-decoration-color: currentColor;
}

.contact.section {
  padding-block: 24px;
}

.contact-card {
  display: flex;
  width: 100%;
  align-items: center;
  justify-content: space-between;
  gap: 28px;
  padding: 17px 22px;
  border: 1px solid rgba(197, 213, 240, .13);
  border-radius: 16px;
  background: rgba(12, 17, 27, .74);
  box-shadow: var(--shadow);
  backdrop-filter: blur(18px);
}

.contact-card .kicker {
  margin-bottom: 2px;
}

.contact-card h2 {
  font-size: clamp(1.35rem, 2vw, 1.75rem);
  letter-spacing: -.035em;
}

.email-address {
  display: inline-flex;
  gap: 13px;
  align-items: center;
  margin: 0;
  padding-bottom: 5px;
  border-bottom: 2px solid rgba(101, 214, 179, .25);
  color: var(--accent);
  font-size: clamp(.86rem, 2vw, 1.05rem);
  font-weight: 800;
  transition: border-color .2s ease;
}

.footer {
  display: flex;
  justify-content: space-between;
  padding-block: 20px 28px;
  color: var(--muted);
  font-size: .76rem;
}

.footer a {
  color: var(--accent);
  font-weight: 800;
}

*:focus-visible {
  outline: 3px solid rgba(101, 214, 179, .45);
  outline-offset: 3px;
}

@media (max-width: 850px) {
  :root {
    --shell: min(100% - 28px, 700px);
  }

  .nav {
    position: relative;
  }

  .nav-toggle {
    display: grid;
    width: 44px;
    height: 44px;
    padding: 0;
    border: 0;
    border-radius: 13px;
    place-content: center;
    gap: 6px;
    background: rgba(101, 214, 179, .1);
  }

  .nav-toggle span:not(.sr-only) {
    display: block;
    width: 18px;
    height: 2px;
    border-radius: 4px;
    background: var(--ink);
    transition: transform .22s ease;
  }

  .nav-toggle[aria-expanded="true"] span:nth-last-child(2) {
    transform: translateY(4px) rotate(45deg);
  }

  .nav-toggle[aria-expanded="true"] span:last-child {
    transform: translateY(-4px) rotate(-45deg);
  }

  .nav-links {
    position: absolute;
    top: calc(100% + 9px);
    right: 0;
    left: 0;
    display: grid;
    padding: 10px;
    border: 1px solid rgba(197, 213, 240, .14);
    border-radius: 19px;
    background: rgba(10, 14, 23, .97);
    box-shadow: var(--shadow);
    opacity: 0;
    pointer-events: none;
    transform: translateY(-10px) scale(.97);
    transform-origin: top;
    transition: opacity .2s ease, transform .2s ease;
    backdrop-filter: blur(20px);
  }

  .nav-links.open {
    opacity: 1;
    pointer-events: auto;
    transform: none;
  }

  .hero {
    display: grid;
    grid-template-columns: 1fr;
    gap: 26px;
    padding-right: 0;
    padding-top: 24px;
  }

  .portrait-wrap {
    position: relative;
    top: auto;
    right: auto;
    justify-self: center;
    width: min(46%, 160px);
  }

  .research-grid {
    grid-template-columns: 1fr;
  }

  .heading-row {
    display: block;
  }

  .heading-row .text-link {
    display: inline-block;
    margin-top: 25px;
  }

}

@media (max-width: 540px) {
  .brand-name {
    display: none;
  }

  .section {
    padding-block: 42px;
  }

  .publication-main {
    grid-template-columns: 52px 1fr auto;
    gap: 9px;
  }

  .publication:hover {
    padding-inline: 10px;
  }

  .publication-arrow {
    width: 34px;
  }

  .publication-authors {
    margin-left: 61px;
    margin-right: 8px;
  }

  .contact-card {
    align-items: flex-start;
    flex-direction: column;
    gap: 13px;
    padding: 15px 17px;
  }

  .footer {
    gap: 20px;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    transition-duration: .01ms !important;
    animation-duration: .01ms !important;
    animation-iteration-count: 1 !important;
  }
}