/* -----------------------------------------------------------
   UC Berkeley Themed Personal Website by Vinh Nguyen (created 2025)
   Font: Georgia (Serif + Sans)
   ----------------------------------------------------------- */

/* Base styles */
body {
  font-family: 'Georgia', serif;
  margin: 0;
  background-color: #f9fafc;
  color: #222;
  line-height: 1.6;
}

/* Header with dynamic backgrounds - compact height */
header {
  max-width: 1025px;
  margin: 1.5rem auto 0 auto; /* center & give spacing above */
  color: white;
  text-align: center;
  padding: 1rem 0; /* half-height */
  background-size: cover;
  background-position: center;
  background-repeat: no-repeat;
  position: relative;
  border-radius: 12px;  /*optional rounded edges */
  overflow: hidden;
}

header::after {
  content: "";
  position: absolute;
  inset: 0;
  background:  rgba(0, 39, 118, 0.4);/* Berkeley blue overlay */
}


/*Body background */
body {
  background-image: url("images/"); /* replace with the image file */
  background-size: cover; /* adjust size of pattern */
  background-repeat: no-repeat;
  background-attachment: fixed;
  background-color: #f5f8fc ; /*  fallback light winter blue / almost white */
}

/* Different background per page */
body.home header {
  background-image: url('images/golden_bridge.jpg');
}

body.research header {
  background-image: url('images/UCBcampus.jpg');
}

body.teaching header {
  background-image: url('images/UCBcampus.jpg');
}

body.others header {
  background-image: url('images/peach.jpg');
  background-size: 500px;
  background-repeat: repeat;
}

/* Header title and subtitle color (Berkeley Gold) */
header h1,
header p {
  color: #FDB515; /* UC Berkeley Gold */
  position: relative;
  z-index: 1;
}

header p {
  font-family: 'Georgia', serif;
  font-weight: 400;
  font-size: 1.2rem;
  margin-top: 0.5rem;
}

/* Navigation Bar - compact */
nav {
  max-width: 1025px;
  margin: 0.75rem auto;  /* center the nav bar */
  border-radius: 8px;
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  background-color: #003262; /* Berkeley Blue Alt */
  padding: 0.5rem 0;
}

nav a {
  color: white;
  padding: 0.5rem 1rem;
  text-decoration: none;
  font-family: 'Georgia', serif;
  font-weight: 600;
  transition: background 0.3s;
}

nav a:hover,
nav a.active {
  background-color: #3b7ea1; /* Berkeley accent */
}

/* Content */
.content {
  max-width: 950px;
  margin: 2rem auto;
  padding: 2rem 2.5rem;
  background: white;
  border-radius: 12px;
  box-shadow: 0 4px 10px rgba(0,0,0,0.08);
}

/* Profile on Home page */
.profile {
  display: flex;
  align-items: center;
  gap: 2rem;
}

.profile img {
  width: 220px;
  height: 220px;
  border-radius: 50%;
  box-shadow: 0 2px 6px rgba(0,0,0,0.15);
  object-fit: cover;
  border: none;
}

/* Profile image column */
.profile-left {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
}

/* Academic icons */
.academic-links {
  display: flex;
  justify-content: left;
  gap: 1rem;
  margin-top: 1rem;
}

.academic-links img {
  width: 34px;
  height: 34px;
  opacity: 0.9;
  transition: transform 0.25s ease, opacity 0.25s ease;
}

.academic-links img:hover {
  transform: scale(1.15);
  opacity: 1;
}

/* Profile text (justified alignment) */
.profile-text {
  flex: 1;
  text-align: justify;
}

.profile-text p {
  text-align: justify;
  text-justify: inter-word;
}

/* Headings */
h2, h3 {
  font-family: 'Georgia', serif;
  color: #002676;
  font-weight: 700;
  margin-top: 1.5rem;
  margin-bottom: 0.5rem;
}

/* Links */
a {
  color: #003262;
  text-decoration: none;
}
a:hover {
  text-decoration: underline;
}

/* Publication List */
.pub-list {
  list-style: none;
  padding-left: 0;
}

.pub-list li {
  margin-bottom: 1.2rem;
  line-height: 1.5;
  text-align: justify;
}

.pub-list b {
  color: black;
  margin-right: 0.5rem;
}

.pub-list a {
  font-family: 'Georgia', serif;
}

/* Footer */
footer {
  text-align: center;
  padding: 1rem;
  color: #555;
  font-size: 0.9em;
  margin-top: 2rem;
  font-family: 'Georgia', serif;
}

/* Responsive */
@media (max-width: 700px) {
  .profile {
    flex-direction: column;
    text-align: center;
  }
  .profile img {
    margin-bottom: 1rem;
  }
  .content {
    padding: 1.5rem;
  }
  nav a {
    padding: 0.5rem 0.8rem;
  }
}