/* 1. Box-sizing reset */
*, *::before, *::after {
  box-sizing: border-box;
}

html {
  overflow-y: scroll;
}

/* 2. Base typography & layout */
body {
  font-family: 'Space Grotesk', sans-serif;
  background-color: #fdf6ec;
  color: #1c1c1c;
  margin: 0;
  padding: 0;
  line-height: 1.7;
  font-size: 1.0rem;
}

h1 {
  font-size: 2.5rem;
  margin-bottom: 0.5rem;
}

.title {
  font-size: 1.1rem;
  color: #ef798a;
  margin-bottom: 1.5rem;
}

.container {
  max-width: 960px;
  margin: 0 auto;
  padding: 0 1rem;
}

main.container {
  padding-top: 2rem;
}

/* 3. Topbar & navigation */
.topbar {
  background: #fdf6ec;
  border-bottom: 1px solid #eaeaea;
  position: sticky;
  top: 0;
  z-index: 1000;
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 1rem 0;
}

.logo {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  font-weight: 600;
  color: #1c1c1c;
  font-size: 1.3rem;
}

nav a {
  text-decoration: none;
  color: #1c1c1c;
  margin-left: 1.5rem;
  font-weight: 500;
}

nav a:hover,
nav a.active {
  color: #ef798a;
}

/* 4. Research page headings */
.section-title {
  font-size: 1.75rem;
  color: #ef798a;
  margin: 0rem 0 0.6rem;
  font-weight: 600;
}

/* 5. Title row with buttons */
.pub-title-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 0.6rem;
  margin-bottom: 0.1rem;
  flex-wrap: wrap;
}

.paper-title {
  margin: 0;
  font-size: 1rem;
  font-weight: 600;
  flex: 1 1 auto;
}

/* 6. Metadata (journal + description) */
.pub-journal, .pub-coauthors {
  font-size: 0.9rem;
  color: #767676;
  margin: 0;
  line-height: 1.4;
}
.pub-journal {
  margin-top: 0.1rem;
  font-style: normal;
}
.pub-coauthors {
  margin-bottom: 0.3rem;
}
.pub-desc {
  font-size: 0.9rem;
  line-height: 1.4;
  color: #444;
    margin: 0.3rem 0 0.3rem;

}

/* 7. Buttons */
.pub-buttons {
  display: flex;
  gap: 0.3rem;
  flex-wrap: wrap;
  background: none;
}

.btn-like {
  padding: 0.2em 0.5em;
  font-size: 0.85rem;
  border: 1px solid #ef798a;
  border-radius: 5px;
  background: none;
  color: #ef798a;
  font-weight: 500;
  cursor: pointer;
  transition: background 0.2s, color 0.2s;
  text-decoration: none;
}

.btn-like:hover,
.btn-like.active {
  background: #ef798a;
  color: white;
}

/* 8. Abstract toggle section */
.abstract-content.hidden {
  display: none;
}
.abstract-content {
  background-color: #e7f3e2;
  border-left: 4px solid #ef798a;
  padding: 0.75rem 1rem;
  margin-top: 0.5rem;
  font-size: 0.9rem;
  line-height: 1.4;
  color: #222;
  animation: fadeIn 0.3s ease-in-out;
  max-width: 850px;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(-5px); }
  to   { opacity: 1; transform: translateY(0); }
}

/* 9. Paper block spacing */
.pub {
  padding-bottom: 0.5rem;
  border-bottom: 1px solid #f3e6e8;
  margin-bottom: 0.8rem;
}

/* 10. Intro section (used on index page) */
.intro {
  display: flex;
  align-items: flex-start;
  flex-wrap: wrap;
  gap: 2rem;
  padding-top: 2rem;
}
.bio-text {
  flex: 3 1 500px;
}
.bio-photo {
  flex: 1 1 160px;
  max-width: 180px;
}
.avatar {
  width: 100%;
  border-radius: 6px;
  border: 3px solid #ef798a;
}

/* 11. Email + disclaimer */
.email {
  color: #ef798a;
  font-weight: 500;
  text-decoration: none;
  border-bottom: 1px dashed #ef798a;
}
.email:hover {
  background-color: #e7f3e2;
}
.disclaimer {
  font-size: 0.9rem;
  color: #666;
  font-style: italic;
}

/* 12. Coauthor links */
.coauthor-link {
  color: #ef798a;
  text-decoration: none;
  border-bottom: 1px dashed #ef798a;
  transition: color 0.3s ease, border-bottom-color 0.3s ease;
}
.coauthor-link:hover {
  background-color: #e7f3e2;
}
.pub-journal:not(:has(+ .pub-coauthors)) {
  margin-bottom: 0.3rem;
}

/* 13. Responsive layout */
@media (max-width: 700px) {
  .pub-title-row {
    flex-direction: column;
    align-items: flex-start;
    gap: 0.4rem;
    margin-bottom: 0.3rem;
  }

  .paper-title {
    font-size: 1.05rem;
  }

  .pub-buttons {
    gap: 0.4rem;
    margin: 0.2rem 0;
  }

  .btn-like {
    padding: 0.3em 0.8em;
    font-size: 0.85rem;
    border: 1px dashed #ef798a;
    border-radius: 2em;
  }

  .btn-like:hover {
    background-color: #ef798a;
    color: white;
    border-style: solid;
  }

  .pub-journal, .pub-coauthors {
    display: inline;
    font-size: 0.95rem;
    position: relative;
    top: -0.1em;
  }

  .pub-journal:has(+ .pub-coauthors)::after {
    content: " // ";
  }

  .pub-desc, .abstract-content {
    font-size: 0.95rem;
    line-height: 1.4;
  }

  .abstract-content {
    padding: 0.75rem;
    border-radius: 6px;
    margin-top: 0.7rem;
  }

  .topbar {
    padding: -0.2rem 0.8rem;
  }

  .nav {
    flex-direction: column;
    align-items: center;
    gap: 0.1rem;
  }

  .nav .logo {
    font-size: 1.3rem;
    font-weight: 700;
  }

  .nav nav {
    display: flex;
    justify-content: center;
    gap: 1rem;
  }

  .nav nav a {
    font-size: 0.92rem;
    white-space: nowrap;
  }

  main.container {
    padding-top: 0.5rem;
  }

  .intro {
    padding-top: 0.5rem;
  }
}

/* 14. Navigation photo (square with modal behavior) */
.nav-right {
  display: flex;
  align-items: center;
  gap: 1.8rem;
  margin-left: auto;
}

.nav-pic-wrapper {
  position: relative;
  display: inline-block;
  margin-left: 1.2rem;
}

.nav-pic {
  width: 40px;
  height: 40px;
  object-fit: cover;
  border: 1.5px solid #ef798a;
  border-radius: 12px; /* <-- Square with soft edges */
  cursor: pointer;
  transition: box-shadow 0.3s ease, filter 0.3s ease;
}

.nav-pic:hover {
  box-shadow: 0 0 10px 2px #ef798a80;
  filter: brightness(1.08);
}

/* Tooltip */
.hover-tooltip {
  position: absolute;
  bottom: -1.6rem;
  left: 50%;
  transform: translateX(-50%);
  background-color: #ef798a;
  color: white;
  font-size: 0.75rem;
  padding: 0.25em 0.6em;
  border-radius: 4px;
  white-space: nowrap;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.2s ease-in-out;
  box-shadow: 0 2px 4px rgba(0,0,0,0.15);
}

.nav-pic-wrapper:hover .hover-tooltip {
  opacity: 1;
}

/* Modal */
.modal {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  display: flex;
  justify-content: center;
  align-items: center;
  z-index: 9999;
}

.modal-overlay {
  position: absolute;
  width: 100%;
  height: 100%;
  background: rgba(250, 250, 250, 0.8);
  backdrop-filter: blur(6px);
}

.modal-img {
  position: relative;
  max-width: 80%;
  max-height: 80%;
  border-radius: 10px;
  border: 4px solid #ef798a;
  box-shadow: 0 8px 24px #e7f3e2;
  z-index: 1;
  animation: zoomIn 0.3s ease;
}

.modal-close {
  position: absolute;
  top: 2rem;
  right: 2rem;
  font-size: 2rem;
  background: none;
  border: none;
  color: #333;
  cursor: pointer;
  z-index: 2;
  transition: color 0.2s ease;
}

.modal-close:hover {
  color: #ef798a;
}

@keyframes zoomIn {
  from {
    transform: scale(0.7);
    opacity: 0;
  }
  to {
    transform: scale(1);
    opacity: 1;
  }
}

.hidden {
  display: none;
}