body {
  margin: 0;
  font-family: Arial, sans-serif;
  line-height: 1.6;
  background: #f9f9f9;
  color: #333;
}

header {
  background: #222;
  color: #fff;
  padding: 1rem;
  text-align: center;
}

header h1 {
  margin: 0;
}

nav {
  margin-top: 0.5rem;
}

nav a {
  color: #fff;
  text-decoration: none;
  margin: 0 10px;
}

nav a:hover {
  text-decoration: underline;
}

.hero {
  text-align: center;
  padding: 3rem 1rem;
  background: #e9f5ff;
}

.button {
  display: inline-block;
  margin-top: 1rem;
  padding: 10px 20px;
  background: #0077cc;
  color: #fff;
  text-decoration: none;
  border-radius: 5px;
}

.button:hover {
  background: #005fa3;
}

.newsletter-preview {
  display: flex;
  flex-wrap: wrap;
  gap: 2rem;
  padding: 2rem;
}

.newsletter-left, .newsletter-right {
  flex: 1 1 45%;
  background: #fff;
  padding: 1rem;
  border-radius: 8px;
  box-shadow: 0 2px 6px rgba(0,0,0,0.1);
}

.chart-img {
  max-width: 100%;
  border-radius: 6px;
}

.stock-table {
  margin: 2rem;
  background: #fff;
  padding: 1rem;
  border-radius: 8px;
  box-shadow: 0 2px 6px rgba(0,0,0,0.1);
}

.csv-table {
  width: 100%;
  border-collapse: collapse;
}

.csv-table th, .csv-table td {
  border: 1px solid #ddd;
  padding: 8px;
  text-align: left;
}

.csv-table th {
  background: #0077cc;
  color: #fff;
}

.csv-table tr:nth-child(even) {
  background: #f2f2f2;
}