body {
  font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
  margin: 1em;
  background: #f0f2f5;
  color: #333;
}
.tabs {
  position: sticky;
  top: 0;
  background: #fff;
  padding: 0.5em;
  display: flex;
  flex-wrap: wrap;
  gap: 0.5em;
  margin-bottom: 1em;
  z-index: 1000;
  border-bottom: 1px solid #ddd;
}
.tabs button {
  padding: 0.5em 1em;
  border-radius: 6px;
  border: 1px solid #ccc;
  background: linear-gradient(to bottom, #ffffff, #e6e6e6);
  color: #333;
  font-size: 0.9em;
  cursor: pointer;
  transition: background 0.3s, box-shadow 0.3s;
}
.tabs button:hover {
  background: linear-gradient(to bottom, #f0f0f0, #d9d9d9);
  box-shadow: 0 2px 6px rgba(0,0,0,0.1);
}
.tabs button.active-tab {
  background: linear-gradient(to bottom, #007acc, #005999);
  color: #fff;
  border: 1px solid #005999;
  box-shadow: 0 2px 6px rgba(0,0,0,0.2);
}
.feeds-container {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1em;
}
.feed-tile {
  background: #fff;
  border-radius: 8px;
  padding: 1em;
  box-shadow: 0 2px 8px rgba(0,0,0,0.05);
  display: flex;
  flex-direction: column;
  border: 1px solid #e0e0e0;
}
.feed-tile h3 {
  margin: 0 0 0.5em;
  font-size: 1em;
  color: #333;
}
.items {
  max-height: 10em;
  overflow-y: auto;
}
.items a {
  display: block;
  margin: 0.2em 0;
  font-size: 0.9em;
  color: #007acc;
  text-decoration: none;
  transition: color 0.2s;
}
.items a:hover {
  color: #005999;
  text-decoration: underline;
}