body {
  margin: 0;
  font-family: "Arial", sans-serif;
  background: #ffffff;
}
.content .container {
  display: flex;
  max-width: 1200px;  
  margin: 0 auto;
  gap: 40px;
  padding: 16px 40px;
  background-color: #ffffff;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.06);
}
/* Navigation bar */
.navbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 25px 40px;
  background-color: #ffffff;
  justify-content: center; 
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

.logo {
  font-size: 36px;
  font-weight: 700;
  color: #4d90c9;
  text-shadow: none;
  letter-spacing: 0.5px;
}

.nav-menu {
  list-style: none;
  display: flex;
  gap: 20px;
}

.nav-menu li {
  cursor: pointer;
  font-size: 16px;
  color: #333;
}

/* Hero */
.hero {
  position: relative;
  width: 100%;
  height: 600px;
  background-image: url('sydney_homepage.jpg');
  background-size: cover;
  background-repeat: no-repeat;
  background-position: center center;

  display: flex;
  justify-content: center;
  align-items: center;
  text-align: center;
  overflow: hidden;
}

.hero-overlay {
  position: absolute;
  inset: 0;
  background: rgba(0, 0, 0, 0.38);  
}

.hero-content {
  position: relative;
  z-index: 1;
  max-width: 1000px;
  background: none;
  backdrop-filter: none;

}

.hero-text {
  color: #ffffff;
  font-weight: 700;
  text-shadow: 0 2px 8px rgba(0,0,0,0.45);
  margin: 0;
}

.hero-text-main {
  font-size: 48px;
  margin-bottom: 38px;
}

.hero-text-sub {
  font-size: 30px;
  line-height: 1.5;
  margin-top: 8px;
}

/* Main content */
.main-content {
  flex: 3;
}

.main-content h2 {
  font-size: 30px;
  margin-bottom: 20px;
}

.main-content h3 {
  font-size: 30px;
  margin-top: 30px;
  margin-bottom: 10px;
}

.main-content p {
  line-height: 1.8;
  margin-bottom: 20px;
}

.main-content ul {
  padding-left: 40px;
}

.main-content ul li {
  margin-bottom: 8px;
}

/* sidebar */
.sidebar {
  flex: 1;
  background-color: #ffffff;
  padding: 20px;
  border-radius: 8px;
  box-shadow: 0 2px 8px rgba(0,0,0,0.05);
  border-left: none !important;
  box-shadow: none !important;
}

.sidebar h4 {
  font-size: 18px;
  margin-bottom: 12px;
  border-bottom: 2px solid #5396cc;
  padding-bottom: 6px;
}
.sidebar-image {
  width: 100%;       
  height: auto;      
  display: block;    
  margin-top: 16px;  
  border-radius: 4px;

}
.keywords {
  list-style: none;
  padding: 0;
  margin: 0;
}

.keywords li {
  padding-left: 0;
  margin-bottom: 0.4em;    
  line-height: 1.4;
  font-size: 16px;         
  color: #333;
}
.publication p {
  margin: 0;
  line-height: 1.6;
}

.site-footer {
  width: 100%;
  background-color: #1d3c61;
  color: #ddd;
  padding: 20px 0;
  font-size: 25px;
  text-align: center;
}

.site-footer p {
  margin: 0;      
}