body {
  font-family: Arial, sans-serif;
  margin: 0;
  padding: 0;
}

.container {
  display: flex;
  height: 100vh;
}

aside {
  width: 220px;
  border-right: 1px solid #ccc;
  padding: 10px;
  overflow-y: auto;
  background-color: #f9f9f9;
}

aside h2 {
  font-size: 18px;
  margin-bottom: 10px;
}

#sourceList {
  list-style: none;
  padding-left: 0;
}

#sourceList li {
  cursor: pointer;
  margin: 4px 0;
  transition: background 0.2s;
}

#sourceList li:hover {
  background-color: #e0e0e0;
}

.region-header {
  font-weight: bold;
  margin-top: 12px;
  color: #333;
  border-bottom: 1px solid #ccc;
  padding-bottom: 2px;
}

.source-item {
  padding-left: 12px;
}

main {
  flex: 1;
  padding: 10px;
  overflow-y: auto;
}

#searchInput {
  width: 100%;
  padding: 6px 10px;
  margin-bottom: 10px;
  border: 1px solid #ccc;
  border-radius: 4px;
}

#articleList {
  list-style: none;
  padding-left: 0;
}

#articleList li {
  margin-bottom: 8px;
}

#articleList li a {
  text-decoration: none;
  color: #0066cc;
}

#articleList li a:hover {
  text-decoration: underline;
}