/* Dark mode
html.dark {
  --bg-light: #18141e;
  --text-light: #faf9fb;
} */

/* [data-theme="dark"] {
    --primary: #0d358a;
    --bg: #18141e;
    --text: #faf9fb;
    --card: #1e1e1e;
    --border: #333333;
} */

/* body { 
  font-family: var(--font);
  background: var(--bg-light);
  color: var(--text-light);
  min-height: 100vh;
} */


/* Dark toggle
.dark-toggle {
  position: absolute;
  top: 2rem;
  right: 2rem;
  background: none;
  border: none;
  cursor: pointer;
} */

/* Show light icon in light mode
.light-icon {
  display: inline;
}
.dark-icon {
  display: none;
}

/* Show dark icon in dark mode */
/* html.dark .dark-icon {
  display: inline;
}
html.dark .light-icon {
  display: none;
}  */

/* Header */
.site-header { 
  backdrop-filter: blur(12px);
  background: rgba(255,255,255,0.5);
  padding: 1rem 1.5rem;
  text-align: center;
  z-index: 100;
}

/* add slow smooth scrolling behavior */
html {
  scroll-behavior: smooth;
} 

/* html.dark .site-header {
  background: rgba(255, 255, 255, 0.363);
} */

.site-header h1 { 
    margin: 0.5rem 0; 
    font-size: 2rem; 
}

.identity h1 {
  font-size: 3rem;
  color: var(--primary);
}

.identity p {
  font-size: 1.25rem;
  opacity: 0.8;
}

/* container */
.container { 
  max-width: 1200px;
  margin: auto;
  padding: 3rem 1.5rem;
}


/* Hero grid */
/* .hero-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 1rem;
}

.hero-card {
  position: relative;
  aspect-ratio: 1 / 1;
  background-size: cover;
  background-position: center;
  border-radius: var(--radius);
  overflow: hidden;
  cursor: pointer;
  transition: transform 0.7s;
}

.hero-card:hover {
  transform: scale(1.05);
}

.hero-card .overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(to top, rgba(59,31,97,0.9), transparent);
  color: white;
  padding: 1.5rem;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
} */

/* Bio */
.bio {
  margin-top: 2rem;
  text-align: center;
}

.bio img {
  width: 192px;
  height: 192px;
  object-fit: cover;
  margin-bottom: 1.5rem;
  border-radius: 50%; 
  border: 5px solid var(--primary);
}

.bio h2 {
  font-size: 1.75rem;
  margin-bottom: 0.5rem;
  opacity: 0.9;
}

.bio p {
  font-size: 1.1rem;
  color: var(--text-light);
  opacity: 0.8;
  max-width: 700px;
  margin: auto;
  text-align: justify;
  line-height: 1.6;
}

/* Research */
.research {
  margin-top: 3rem;
  text-align: center;
  justify-content: center;
}

.research h2 {
  font-size: 1.75rem;
  margin-bottom: 0.5rem;
  opacity: 0.9;
  text-align: center;
}

.research p {
  font-size: 1.1rem;
  color: var(--text-light);
  opacity: 0.8;
  max-width: 700px;
  margin: auto;
  text-align: justify;
  line-height: 1.6;
} 

.research a {
  display: inline-block;
  margin-top: 1.5rem;
}

.btn {
  padding: 0.6rem 1.5rem;
  border-radius: 999px;
  border: 1px solid #ddd;
  text-decoration: none;
  color: var(--text-light);
  transition: var(--transition);
}
.btn:hover {
  background: var(--primary);
  color: white;
  transform: scale(1.1);
}

/* Education */
.education {
  margin-top: 3rem;
}

.education h2 {
  font-size: 1.75rem;
  margin-bottom: 0.5rem;
  opacity: 0.9;
  text-align: center;
}

.education ul {
  list-style: none;
  padding: 0;
  max-width: 600px;
  margin: auto;
}

/* Container for the timeline */
.timeline {
  display: flex;
  overflow-x: auto;
  gap: 20px;
  padding: 20px 0;
  position: relative;
  justify-content: space-evenly; 
  align-items: center;         /* Center the items vertically */
  width: 100%;                 /* Ensure full-width use for the timeline */
  scroll-snap-type: x mandatory; /* Snap scrolling */
}

.timeline-item {
position: relative;
  display: flex;
  flex-direction: column;
  align-items: center;  /* Center items horizontally */
  justify-content: center; /* Vertically center items */
  cursor: pointer;
  width: auto;  /* Ensure the item takes the required space */
  scroll-snap-align: center; 
}

.timeline-icon {
  width: 20px;
  height: 20px;
  background-color: gray;  /* Purple */
  border-radius: 50%;
  margin-bottom: 8px;
}

.timeline-icon:hover {
  background-color: var(--primary);  /* Purple */
  transform: scale(1.2);
  transition-delay: 0.1s;
}

.timeline-year {
  font-weight: bold;
  color: #3b1f61;
  margin-bottom: 4px;
  text-align: center;
}

.timeline-title {
  color: #333;
  text-align: center;
}

.timeline-info {
  display: none;
  background-color: white;
  padding: 20px;
  flex-direction: column;
  border-radius: 999px;
  margin-top: 10px;
  margin-bottom: 20px;
  border: 1px solid #ede9f1;
  width: 80%;
  margin-left: auto;
  margin-right: auto;
  transition: max-height 0.5s ease, opacity 0.5s ease;
}

.timeline-info ul {
  list-style-type: disc;
  margin-left: 20px;
}

.close-btn {
  background: none;
  border: none;
  font-size: 18px;
  color: #f00;
  cursor: pointer;
  position: absolute;
  top: 10px;
  right: 10px;
}

/* Show the info when active */
.timeline-info.active {
  display: block;
}

@media (max-width: 768px) {
  .timeline {
    flex-direction: column;
    align-items: center;
  }

  .timeline-item {
    margin-bottom: 20px;
  }

  .timeline-info {
    width: 100%;
  }
}


/* 6. Publication Carousel */
.pub-highlights {
  margin-top: 3rem;
}

.pub-highlights h2 {
  font-size: 1.75rem;
  margin-bottom: 0.5rem;
  opacity: 0.9;
  text-align: center;
}

.carousel-container { 
    display: flex; 
    overflow-x: auto; 
    scroll-snap-type: x mandatory; 
    scrollbar-width: none; 
    gap: 30px; 
    padding-bottom: 1.5rem;
    padding-top: 1.5rem;
    padding-left: 1.5rem;
    width: 100%;
    position: relative; /* Ensures it is positioned correctly for scroll */
}

.carousel-slide { 
    flex: 0 0 100%; 
    scroll-snap-align: start; 
    display: grid; 
    grid-template-columns: 1fr 3fr; 
    gap: 2rem; 
    padding-bottom: 1.5rem;
    padding-top: 1.5rem;
    box-shadow: 0 10px 10px rgba(0,0,0,.1); 
    border-radius: 16px;
    background: white;
    transition: background 0.2s, border 0.2s;
}

.pub-front-page {
  width: 100%;
  display: block;
  position: relative;
  padding-left: 1rem;
  padding-right: 1rem;
}

.pub-front-page img {
  width: 100%;
  height: auto;  /* Maintain aspect ratio */
  box-shadow: 2px 2px 10px rgba(0, 0, 0, 0.1);
}

.pub-summary h3 {
  margin-top: 0;
  color: var(--primary);
}

.pub-summary p {
  color: var(--text-light);
  opacity: 0.8;
  padding-bottom: 1rem;
  font-size: 1rem;
  padding-right: 1rem;
  padding-top: 1rem;
}

.carousel-dots { 
    text-align: center; 
    margin-top: 1rem;
}

.dot { 
    height: 12px; 
    width: 12px; 
    background: gray; 
    border-radius: 50%; 
    display: inline-block; 
    cursor: pointer; 
    margin: 0 5px; 
}

.dot.active { 
    background: var(--primary); 
}

.dot:hover {
  background: var(--primary);
  transform: scale(1.2);
}