@import url('https://fonts.googleapis.com/css2?family=Libre+Franklin:wght@200;400;600&display=swap');

body {
  font-family: 'Libre Franklin', 'Segoe UI', Arial, sans-serif;
  background: #fff;
  color: #111;
  margin: 0;
  padding: 0;
  font-weight: 200;
  line-height: 1.6;
}
nav {
  background: #f8f8f8;
  border-bottom: 1px solid #e0e0e0;
  padding: 0.5em 0;
}
nav ul {
  list-style: none;
  display: flex;
  justify-content: center;
  margin: 0;
  padding: 0;
}
nav li {
  margin: 0 1.5em;
}
nav a {
  text-decoration: none;
  color: #222;
  font-weight: 500;
  transition: color 0.2s;
}
nav a:hover {
  color: #0077cc;
}
nav a.active, nav a.active {
  color: #fff;
  background: #0077cc;
  border-radius: 5px;
  padding: 0.2em 0.8em;
  box-shadow: 0 2px 8px rgba(0,119,204,0.10);
  transition: background 0.2s, color 0.2s;
}
nav a.active:hover {
  background: #005fa3;
}
main {
  max-width: 700px;
  margin: 2em auto;
  padding: 0 1em;
}
h1, h2 {
  font-weight: 600;
}
.video-container {
  position: relative;
  padding-bottom: 56.25%;
  height: 0;
  overflow: hidden;
  max-width: 100%;
}
.video-container iframe {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  border: 0;
}
.pub-list {
  display: flex;
  flex-direction: column;
  gap: 2em;
  margin-top: 2em;
}
.pub-card {
  background: #f9f9fb;
  border-radius: 10px;
  box-shadow: 0 2px 8px rgba(0,0,0,0.04);
  padding: 1.5em 1.5em 1em 1.5em;
  border-left: 5px solid #0077cc;
}
.pub-title {
  font-size: 1.15em;
  font-weight: 600;
  margin-bottom: 0.3em;
  color: #1a3a5d;
}
.pub-citation {
  font-size: 1em;
  color: #333;
  margin-bottom: 0.7em;
}
.pub-links {
  margin-top: 0.5em;
}
.pub-btn {
  display: inline-block;
  background: #0077cc;
  color: #fff !important;
  padding: 0.4em 1.1em;
  border-radius: 5px;
  text-decoration: none;
  font-weight: 500;
  margin-right: 0.7em;
  transition: background 0.2s;
}
.pub-btn:hover {
  background: #005fa3;
}
.pub-btn.pub-secondary {
  background: #e0e0e0;
  color: #222 !important;
}
.pub-btn.pub-secondary:hover {
  background: #bdbdbd;
}