:root {
    --primary: #d32f2f;
    --primary-dark: #9a0007;
    --primary-light: #ff6659;
    --white: #ffffff;
    --gray-light: #f5f5f5;
    --gray: #e0e0e0;
    --text-dark: #212121;
    --footer-bg: #000000;
  }
  
  * {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
  }
  
  body {
    background-color: var(--gray-light);
    color: var(--text-dark);
    line-height: 1.6;
  }
  
  header {
    background-color: var(--primary);
    color: var(--white);
    padding: 1rem 0;
    box-shadow: 0 2px 5px rgba(0,0,0,0.1);
    position: sticky;
    top: 0;
    z-index: 100;
  }
  
  .container {
    width: 90%;
    max-width: 1200px;
    margin: 0 auto;
  }
  
  .header-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
  }
  
  .logo {
    font-size: 1.8rem;
    font-weight: bold;
    display: flex;
    align-items: center;
  }
  
  nav ul {
    display: flex;
    list-style: none;
  }
  
  .hero {
    background-color: var(--primary-dark);
    color: var(--white);
    padding: 4rem 0;
    text-align: center;
  }
  
  .hero h1 {
    font-size: 2.5rem;
    margin-bottom: 1rem;
  }
  
  .hero p {
    font-size: 1.1rem;
    max-width: 700px;
    margin: 0 auto 2rem;
  }
  
  .main-content {
    padding: 3rem 0;
  }
  
  .filters {
    background-color: var(--white);
    padding: 1.5rem;
    border-radius: 8px;
    margin-bottom: 2rem;
    box-shadow: 0 2px 10px rgba(0,0,0,0.05);
  }
  
  .filter-controls {
    display: flex;
    flex-wrap: wrap;
    gap: 1rem;
    margin-top: 1rem;
  }
  
  .filter-controls select,
  .filter-controls input {
    padding: 0.7rem;
    border: 1px solid var(--gray);
    border-radius: 4px;
    font-size: 0.9rem;
  }
  
  .filter-button {
    background-color: var(--primary);
    color: var(--white);
    border: none;
    border-radius: 4px;
    padding: 0.7rem 1.2rem;
    cursor: pointer;
    font-weight: 500;
    transition: background-color 0.3s ease;
  }
  
  .filter-button:hover {
    background-color: var(--primary-dark);
  }
  
  .newsletter-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 2rem;
  }
  
  .newsletter-card {
    background-color: var(--white);
    border-radius: 8px;
    overflow: hidden;
    box-shadow: 0 3px 10px rgba(0,0,0,0.1);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
  }
  
  .newsletter-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 5px 15px rgba(0,0,0,0.1);
  }
  
  .card-image {
    height: 180px;
    background-color: var(--gray);
    position: relative;
    overflow: hidden;
  }
  
  .category-tag {
    position: absolute;
    top: 10px;
    left: 10px;
    background-color: var(--primary);
    color: var(--white);
    padding: 0.4rem 0.8rem;
    font-size: 0.8rem;
    border-radius: 4px;
    font-weight: 500;
  }
  
  .card-content {
    padding: 1.5rem;
  }
  
  .card-date {
    font-size: 0.85rem;
    color: #757575;
    margin-bottom: 0.5rem;
  }
  
  .card-title {
    font-size: 1.25rem;
    margin-bottom: 1rem;
    font-weight: 600;
  }
  
  .card-excerpt {
    color: #616161;
    margin-bottom: 1.5rem;
    font-size: 0.95rem;
  }
  
  .read-more {
    color: var(--primary);
    text-decoration: none;
    font-weight: 500;
    display: inline-flex;
    align-items: center;
    font-size: 0.95rem;
    transition: color 0.3s ease;
  }
  
  .read-more:hover {
    color: var(--primary-dark);
  }
  
  .read-more svg {
    margin-left: 5px;
    transition: transform 0.3s ease;
  }
  
  .read-more:hover svg {
    transform: translateX(3px);
  }
  
  .pagination {
    display: flex;
    justify-content: center;
    margin-top: 3rem;
    gap: 0.5rem;
  }
  
  .pagination button {
    width: 40px;
    height: 40px;
    border: 1px solid var(--gray);
    background-color: var(--white);
    border-radius: 4px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all 0.3s ease;
  }
  
  .pagination button.active {
    background-color: var(--primary);
    color: var(--white);
    border-color: var(--primary);
  }
  
  .pagination button:hover:not(.active) {
    background-color: var(--gray);
  }
  
  footer {
    background-color: var(--footer-bg);
    color: var(--white);
    padding: 1rem 0;
    text-align: center;
  }
  
  @media (max-width: 768px) {
    .header-content {
      flex-direction: column;
      text-align: center;
    }
  
    .hero h1 {
      font-size: 2rem;
    }
  }