:root {
  --accent: purple;
  --text: #111;
  --border: #e6e6e6;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: "Raleway", "Open Sans", sans-serif;
  font-size: 18px;
  color: var(--text);
  background: #fff;
  line-height: 1.55;
}

section {
  scroll-margin-top: 100px;
}

a {
  color: var(--accent);
  text-decoration: none;
  border-bottom: 1px dashed var(--accent);
}

a:hover {
  font-weight: 600;
  color: var(--accent);
  border-bottom: 1.5px solid var(--accent);
}

/* Header */
.topbar {
  position: sticky;
  top: 0;
  z-index: 999;
  height: 74px;
  padding: 0 82px;
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
  background: #fff;
  display: flex;
  align-items: center;
  justify-content: flex-end;
}

.nav {
  display: flex;
  align-items: center;
  gap: 18px;
}

.nav a {
  color: var(--accent);
  font-size: 18px;
}

.nav a.hover {
  color: var(--accent);
  border-bottom: 1.5px solid var(--accent);
}

.nav a.active {
  color: var(--accent);
  border-bottom: 1.5px solid var(--accent);
}

.menu-toggle,
.menu-btn {
  display: none;
}

/* Page layout */
.page {
  max-width: 1100px;
  margin: 0 auto;
  padding: 58px 32px;
}

/* Hero */
.hero {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 400px;
  gap: 48px;
  align-items: center;
}

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

h1 {
  margin: 0 0 4px;
  font-size: 48px;
  font-weight: 300;
  line-height: 1.15;
}

h1 strong {
  font-weight: 800;
}

.role {
  margin-top: 0;
  margin-bottom: 20px;
}

.profile-img {
  width: 350px;
  height: 350px;
  object-fit: cover;
  border-radius: 50%;
}

/* Text */
h2 {
  font-size: 40px;
  font-weight: 300;
  margin: 48px 0 18px;
  line-height: 1.2;
}

.page-bold-text {
  font-weight: 600;
}

.margin-needed {
  margin-top: 60px;
  margin-bottom: 30px;
}

.highilght-list {
  margin-top: 30px;
}

/* Publications */
.pub-row {
  display: grid;
  grid-template-columns: 300px 1fr;
  gap: 34px;
  align-items: start;
  margin-bottom: 42px;
}

.pub-info p {
  margin: 2px 0;
}

.image-link {
  display: inline-block;
  border-bottom: none;
}

.image-link:hover {
  border-bottom: none;
}

.pub-row img {
  margin-top: 15px;
  width: 300px;
  height: 150px;
  object-fit: contain;
  object-position: center;
  border-radius: 4px;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.18);
  cursor: zoom-in;
}

.image-overlay {
  display: none;
}

.image-overlay:target {
  position: fixed;
  inset: 0;
  z-index: 1000;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(0, 0, 0, 0.75);
}

.image-overlay img {
  width: min(90vw, 900px);
  height: auto;
  max-height: 85vh;
  object-fit: contain;
  border-radius: 6px;
  background: #fff;
}

.close-overlay {
  position: absolute;
  inset: 0;
  border-bottom: none;
  cursor: zoom-out;
}

/* Buttons */
.pub-buttons {
  display: flex;
  gap: 10px;
  margin-top: 10px;
}

.pub-buttons a {
  color: var(--accent);
  border: 1px solid var(--accent);
  padding: 4px 18px;
  font-size: 15px;
  font-weight: 500;
  line-height: 1.2;
}

.pub-buttons a:hover {
  background: var(--accent);
  color: #fff;
  font-weight: 550;
  text-decoration: none;
}

/* Mobile */
@media (max-width: 800px) {
  .topbar {
    height: auto;
    padding: 18px 24px;
    align-items: flex-end;
    flex-direction: column;
    gap: 12px;
  }

  .menu-btn {
    display: block;
    color: var(--accent);
    font-weight: 600;
    cursor: pointer;
  }

  .nav {
    display: none;
    width: 100%;
    flex-direction: column;
    align-items: flex-end;
    gap: 12px;
  }

  .menu-toggle:checked ~ .nav {
    display: flex;
  }

  .page {
    padding: 40px 24px;
  }

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

  .profile-img {
    order: -1;
    justify-self: center;
    width: min(80vw, 300px);
    height: min(80vw, 300px);
  }

  .hero-text {
    order: 1;
  }

  h1 {
    font-size: 38px;
  }

  h2 {
    font-size: 34px;
  }

  .pub-row {
    grid-template-columns: 1fr;
    gap: 12px;
  }

  .pub-row img {
    width: 100%;
    height: auto;
  }
}