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

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

.sidebar {
  width: 220px;
  background: #f5f5f5;
  padding: 20px;
  box-sizing: border-box;
  border-right: 1px solid #ddd;
  min-height: 100vh;
}

.content {
  flex: 1;
  padding: 40px;
}

nav.tabs {
  display: flex;
  gap: 0;
  margin-bottom: 30px;
  border-bottom: 2px solid #e0e0e0;
  background: #fafbfc;
  border-radius: 6px 6px 0 0;
  overflow: hidden;
}

nav.tabs a {
  text-decoration: none;
  color: #333;
  padding: 12px 24px;
  border: none;
  background: none;
  font-weight: 500;
  transition: background 0.2s, color 0.2s;
  border-bottom: 2px solid transparent;
  margin-right: 2px;
}

nav.tabs a.active,
nav.tabs a:hover {
  background: #e6f0fa;
  color: #0078d7;
  border-bottom: 2px solid #0078d7;
}