body {
      font-family: Arial, sans-serif;
      line-height: 1.6;
      margin: 40px auto;
      max-width: 900px;
      padding: 0 20px;
      color: #333;
    }
    h1, h2 {
      color: #111;
    }
    h1 {
      border-bottom: 2px solid #eee;
      padding-bottom: 10px;
    }
    ul {
      margin-left: 20px;
    }
    .header {
      margin-bottom: 30px;
    }
    .date {
      color: #666;
      font-size: 0.9em;
    }

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

.container {
  max-width: 800px;
  margin: 40px auto;
  padding: 20px 30px;
  background: #ffffff;
  border-radius: 10px;
  box-shadow: 0 4px 12px rgba(0,0,0,0.05);
}

h1 {
  font-size: 28px;
  margin-bottom: 20px;
}

h2 {
  font-size: 20px;
  margin-top: 30px;
  border-left: 4px solid #4CAF50;
  padding-left: 10px;
}

p {
  margin: 10px 0;
}

ul {
  padding-left: 20px;
}

li {
  margin-bottom: 8px;
}

a {
  color: #4CAF50;
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

.footer {
  margin-top: 40px;
  font-size: 14px;
  color: #777;
  text-align: center;
}

    .tabs {
  display: flex;
  gap: 10px;
  margin-bottom: 20px;
  flex-wrap: wrap;
}

.tab-button {
  padding: 10px 15px;
  border: none;
  background: #e0e0e0;
  cursor: pointer;
  border-radius: 6px;
  transition: 0.2s;
}

.tab-button:hover {
  background: #d0d0d0;
}

.tab-button.active {
  background: #4CAF50;
  color: white;
}

.tab-content {
  display: none;
}

.tab-content.active {
  display: block;
}

h2 {
  margin-top: 0;
}