/* RESET */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

/* BODY */
body {
  font-family: Arial, sans-serif;
  background: #f5f7fb;
}

/* SAFE IMAGE */
img {
  max-width: 100%;
  height: auto;
}

/* CONTAINER */
.container {
  width: 95%;
  max-width: 1200px;
  margin: auto;
}

/* HEADER */
.main-header {
  background: #123c8d;
  padding: 10px 0;
}

.header-flex {
  display: flex;
  align-items: center;
  gap: 20px;
}

/* LOGO FIX */
.logo img {
  width: 40px !important;
  height: 40px !important;
  object-fit: contain;
}

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

.nav a {
  color: white;
  text-decoration: none;
}

/* BAR */
.issn-bar {
  background: #ef6c35;
  color: white;
  text-align: center;
  padding: 8px;
}

/* GRID */
.two-col {
  display: grid;
  grid-template-columns: 2fr 1fr;
  gap: 20px;
  margin-top: 20px;
}

/* CARD */
.article-card {
  background: white;
  padding: 15px;
  border-radius: 8px;
  margin-bottom: 15px;
}

/* TAG */
.tag {
  display: inline-block;
  background: #e3ecff;
  padding: 3px 8px;
  border-radius: 5px;
  font-size: 11px;
}

/* SIDEBAR */
.sidebar-box {
  background: white;
  padding: 15px;
  border-radius: 8px;
}

/* RESPONSIVE */
@media (max-width: 768px) {
  .two-col {
    grid-template-columns: 1fr;
  }
}