html, body {
    height: 100%;
}
.page-wrapper {
    flex: 1;
}
body {
  margin: 0;
  font-family: "Open Sans", sans-serif;
  background: #f8f9fa;
  color: #333;
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}
/* Navbar */
.navbar {
  background: #111;
  padding: 15px 0;
}

.nav-container {
  width: 90%;
  max-width: 1000px;
  margin: auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.brand {
  color: white;
  font-family: "Oswald", sans-serif;
  font-size: 22px;
}

.nav-links a {
  color: #ccc;
  margin-left: 20px;
  text-decoration: none;
}

.nav-links a:hover {
  color: white;
}

.nav-links a.active {
    color: #fff;
    font-weight: 600;
    border-bottom: 2px solid #fff;
    padding-bottom: 2px;
}
/* Layout */
.container {
  width: 90%;
  max-width: 1000px;
  margin: 40px auto;
  display: flex;
  gap: 30px;
  flex-wrap: wrap;
}

.main {
  flex: 2;
  min-width: 300px;
}

.sidebar {
  flex: 1;
  min-width: 250px;
}

/* Hero Image */
.hero img {
  width: 100%;
  border-radius: 8px;
}

/* Text */
h1,
h2,
h3 {
  font-family: "Oswald", sans-serif;
}

p {
  line-height: 1.6;
}

/* Tags */
.tags span {
  display: inline-block;
  background: #e9ecef;
  padding: 6px 10px;
  margin: 5px 5px 0 0;
  border-radius: 4px;
  font-size: 14px;
}

/* Sidebar */
.card {
  background: white;
  padding: 20px;
  border-radius: 8px;
  margin-bottom: 20px;
}

.card a {
  display: block;
  margin-bottom: 8px;
  color: #007bff;
  text-decoration: none;
}

.card a:hover {
  text-decoration: underline;
}

/* Footer */
footer {
  background: #111;
  color: #ccc;
  text-align: center;
  padding: 20px;
  margin-top: 40px;
}
/* Publication list */
.paper {
  background: white;
  padding: 18px;
  border-radius: 8px;
  margin-bottom: 15px;
  line-height: 1.6;
}

.paper a {
  color: #007bff;
  text-decoration: none;
}

.paper a:hover {
  text-decoration: underline;
}

/* Project cards */
.project {
  background: white;
  padding: 20px;
  border-radius: 8px;
  margin-bottom: 20px;
}

.project a {
  color: #007bff;
  text-decoration: none;
}

.project a:hover {
  text-decoration: underline;
}

/* Box */
.box {
  background: white;
  padding: 30px;
  border-radius: 8px;
  margin-top: 20px;
  font-size: 18px;
}