:root {
    --blog-list-primary-color: #007bff; 
    --blog-list-secondary-color: #28a745; 
    --blog-list-text-color: #333;
    --blog-list-light-text-color: #666;
    --blog-list-date-color: #555; 
    --blog-list-background-color: #f8f9fa; 
    --blog-list-card-background: #fff;
    --blog-list-border-color: #e9ecef;
    --blog-list-shadow-color: rgba(0, 0, 0, 0.1);
    --blog-list-shadow-hover-color: rgba(0, 0, 0, 0.2);
    --blog-list-border-radius: 8px;
  }

  .blog-list__section {
    padding-top: var(--header-offset, 120px);
    padding-bottom: 40px;
    padding-left: 15px;
    padding-right: 15px;
    background-color: var(--blog-list-background-color);
    font-family: 'Helvetica Neue', Helvetica, Arial, sans-serif;
    color: var(--blog-list-text-color);
  }

  .blog-list__section-title {
    text-align: center;
    color: var(--blog-list-text-color);
    margin-bottom: 10px;
    font-size: 2.2em;
    font-weight: bold;
    line-height: 1.3;
    padding-top: 20px;
  }

  .blog-list__section-description {
    text-align: center;
    color: var(--blog-list-light-text-color);
    margin-bottom: 40px;
    font-size: 1.1em;
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
    line-height: 1.6;
  }

  .blog-list__timeline-container {
    position: relative;
    max-width: 1200px;
    margin: 0 auto;
    padding: 20px 0;
  }

  .blog-list__timeline-line {
    position: absolute;
    width: 4px;
    background-color: var(--blog-list-primary-color);
    top: 0;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    z-index: 0;
  }

  .blog-list__item {
    display: flex;
    justify-content: center;
    align-items: center;
    margin-bottom: 40px;
    position: relative;
    z-index: 1;
  }

  .blog-list__item::after {
    content: '';
    position: absolute;
    width: 16px;
    height: 16px;
    background-color: var(--blog-list-primary-color);
    border: 3px solid var(--blog-list-card-background);
    border-radius: 50%;
    left: 50%;
    transform: translateX(-50%);
    z-index: 2;
  }

  .blog-list__date-wrapper {
    position: absolute;
    width: 120px;
    text-align: center;
    left: 50%;
    transform: translateX(-50%);
    top: -25px;
    font-size: 0.9em;
    color: var(--blog-list-date-color);
    background-color: var(--blog-list-background-color);
    padding: 5px 10px;
    border-radius: var(--blog-list-border-radius);
    z-index: 3;
    white-space: nowrap;
  }

  .blog-list__card {
    background-color: var(--blog-list-card-background);
    border-radius: var(--blog-list-border-radius);
    box-shadow: 0 4px 8px var(--blog-list-shadow-color);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    width: calc(50% - 60px);
    padding: 20px;
    display: flex;
    flex-direction: column;
    align-items: flex-start;
  }

  .blog-list__card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 16px var(--blog-list-shadow-hover-color);
  }

  .blog-list__item:nth-child(odd) .blog-list__card {
    margin-right: auto;
    margin-left: 0;
  }

  .blog-list__item:nth-child(even) .blog-list__card {
    margin-left: auto;
    margin-right: 0;
  }

  .blog-list__item:nth-child(odd) .blog-list__date-wrapper {
    left: calc(50% - 200px);
    text-align: right;
  }

  .blog-list__item:nth-child(even) .blog-list__date-wrapper {
    left: calc(50% + 80px);
    text-align: left;
  }

  .blog-list__image-link {
    display: block;
    width: 100%;
    margin-bottom: 15px;
    border-radius: calc(var(--blog-list-border-radius) - 2px);
    overflow: hidden;
  }

  .blog-list__image {
    width: 100%;
    padding-bottom: 56.25%;
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
    display: block;
  }

  .blog-list__content {
    width: 100%;
  }

  .blog-list__title {
    font-size: 1.3em;
    font-weight: bold;
    margin-bottom: 10px;
    line-height: 1.4;
  }

  .blog-list__title-link {
    color: var(--blog-list-text-color);
    text-decoration: none;
    transition: color 0.3s ease;
  }

  .blog-list__title-link:hover {
    color: var(--blog-list-primary-color);
  }

  .blog-list__summary {
    font-size: 1em;
    color: var(--blog-list-light-text-color);
    line-height: 1.6;
    margin-bottom: 15px;
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
    text-overflow: ellipsis;
  }

  .blog-list__read-more {
    display: inline-block;
    background-color: var(--blog-list-primary-color);
    color: var(--blog-list-card-background);
    padding: 10px 15px;
    border-radius: 5px;
    text-decoration: none;
    font-weight: bold;
    transition: background-color 0.3s ease;
  }

  .blog-list__read-more:hover {
    background-color: #0056b3;
  }

  @media (max-width: 1024px) {
    .blog-list__timeline-line {
      left: 20px;
      transform: translateX(0);
    }

    .blog-list__item {
      justify-content: flex-start;
      padding-left: 60px;
    }

    .blog-list__item::after {
      left: 20px;
      transform: translateX(-50%);
    }

    .blog-list__date-wrapper {
      left: 60px;
      text-align: left;
      top: -30px;
    }
    
    .blog-list__item:nth-child(odd) .blog-list__date-wrapper,
    .blog-list__item:nth-child(even) .blog-list__date-wrapper {
      left: 60px;
      transform: translateX(0);
      text-align: left;
    }

    .blog-list__card {
      width: 100%;
      max-width: 600px;
      margin-left: 0 !important;
      margin-right: 0 !important;
    }
  }

  @media (max-width: 768px) {
    .blog-list__section-title {
      font-size: 1.8em;
    }

    .blog-list__section-description {
      font-size: 1em;
    }

    .blog-list__timeline-container {
      padding: 0;
    }

    .blog-list__item {
      padding-left: 50px;
    }

    .blog-list__item::after {
      left: 15px;
    }

    .blog-list__timeline-line {
      left: 15px;
    }

    .blog-list__date-wrapper {
      left: 50px;
      font-size: 0.8em;
      top: -25px;
      padding: 3px 8px;
    }

    .blog-list__card {
      padding: 15px;
    }

    .blog-list__title {
      font-size: 1.1em;
    }

    .blog-list__summary {
      font-size: 0.9em;
      -webkit-line-clamp: 4;
    }

    .blog-list__read-more {
      padding: 8px 12px;
      font-size: 0.9em;
    }
  }

  @media (max-width: 480px) {
    .blog-list__section {
      padding-left: 10px;
      padding-right: 10px;
    }
    .blog-list__item {
      padding-left: 40px;
    }
    .blog-list__item::after {
      left: 10px;
      width: 12px;
      height: 12px;
    }
    .blog-list__timeline-line {
      left: 10px;
      width: 3px;
    }
    .blog-list__date-wrapper {
      left: 40px;
      top: -20px;
      font-size: 0.75em;
      padding: 2px 5px;
    }
    .blog-list__title {
      font-size: 1em;
    }
    .blog-list__summary {
      font-size: 0.85em;
      -webkit-line-clamp: 5;
    }
  }