/* Reset and Base Styles */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  font-family: 'Georgia', serif;
  font-size: 16px;
  line-height: 1.6;
  background-color: #f9f9f9;
  color: #333;
}

/* Header Container */
header {
  background-color: #003366;
  color: #fff;
  padding: 10px 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  border-bottom: 4px solid #006699;
}

/* Logo and Journal Name */
.header-left {
  display: flex;
  align-items: center;
}

.header-left img {
  height: 50px;
  margin-right: 15px;
}

.header-left h1 {
  font-size: 1.5em;
  color: #fff;
  white-space: nowrap;
}

/* Navigation */
nav {
  display: flex;
  gap: 20px;
}

nav a {
  color: #fff;
  text-decoration: none;
  font-weight: bold;
  padding: 8px 12px;
  transition: background 0.3s;
}

nav a:hover {
  background-color: #004d80;
  border-radius: 4px;
}

/* Mobile Menu Toggle */
.menu-toggle {
  display: none;
  background: none;
  border: none;
  color: #fff;
  font-size: 1.5em;
  cursor: pointer;
}

/* Responsive Layout */
@media (max-width: 768px) {
  .menu-toggle {
    display: block;
  }

  nav {
    display: none;
    flex-direction: column;
    width: 100%;
    background-color: #003366;
    margin-top: 10px;
  }

  body.nav-open nav {
    display: flex;
  }

  nav a {
    padding: 10px 20px;
    border-top: 1px solid #004d80;
  }

  header {
    flex-direction: column;
    align-items: flex-start;
  }

  .header-left {
    margin-bottom: 10px;
  }
}