:root {
    --blog-list__primary-bg: #1A237E; 
    --blog-list__secondary-bg: #283593; 
    --blog-list__accent-color: #FFC107; 
    --blog-list__text-light: #E0E0E0; 
    --blog-list__text-dark: #FFFFFF; 
    --blog-list__text-muted: #BBDEFB; 
    --blog-list__border-color: #3F51B5; 
    --blog-list__shadow-color: rgba(0, 0, 0, 0.3);
    --blog-list__shadow-hover: rgba(0, 0, 0, 0.5);
    --header-offset: 120px; 
  }

  .blog-list {
    background-color: var(--blog-list__primary-bg);
    color: var(--blog-list__text-light);
    padding: var(--header-offset, 120px) 20px 60px;
    font-family: 'Arial', sans-serif;
    line-height: 1.6;
  }

  .blog-list__section {
    max-width: 1200px;
    margin: 0 auto;
    padding: 20px 0;
  }

  .blog-list__heading {
    text-align: center;
    color: var(--blog-list__accent-color);
    font-size: 2.5em;
    margin-bottom: 15px;
    font-weight: bold;
    text-shadow: 2px 2px 4px var(--blog-list__shadow-color);
  }

  .blog-list__description {
    text-align: center;
    font-size: 1.1em;
    color: var(--blog-list__text-muted);
    margin-bottom: 40px;
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
  }

  .blog-list__timeline-container {
    position: relative;
    padding: 20px 0;
  }

  .blog-list__timeline-container::before {
    content: '';
    position: absolute;
    top: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 4px;
    background-color: var(--blog-list__border-color);
    height: 100%;
    z-index: 0;
  }

  .blog-list__timeline-item {
    position: relative;
    margin-bottom: 40px;
    display: block;
  }

  .blog-list__timeline-marker {
    position: absolute;
    top: 25px;
    left: 50%;
    transform: translateX(-50%);
    width: 20px;
    height: 20px;
    background-color: var(--blog-list__accent-color);
    border-radius: 50%;
    border: 3px solid var(--blog-list__text-dark);
    z-index: 2;
  }

  .blog-list__timeline-content-wrapper {
    background-color: var(--blog-list__secondary-bg);
    padding: 25px;
    border-radius: 10px;
    box-shadow: 0 5px 15px var(--blog-list__shadow-color);
    width: 100%;
    max-width: 500px;
    position: relative;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    margin: 0 auto;
  }

  .blog-list__timeline-content-wrapper:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 20px var(--blog-list__shadow-hover);
  }

  .blog-list__timeline-date {
    display: block;
    font-size: 0.9em;
    color: var(--blog-list__text-muted);
    margin-bottom: 15px;
    text-align: right;
  }

  .blog-list__timeline-image-link {
    display: block;
    margin-bottom: 15px;
    border-radius: 8px;
    overflow: hidden;
  }

  .blog-list__timeline-image {
    width: 100%;
    height: 200px;
    object-fit: cover;
    display: block;
    border-radius: 8px;
  }

  .blog-list__timeline-title {
    font-size: 1.5em;
    margin-bottom: 10px;
    font-weight: bold;
  }

  .blog-list__timeline-title-link {
    color: var(--blog-list__text-dark);
    text-decoration: none;
    transition: color 0.3s ease;
  }

  .blog-list__timeline-title-link:hover {
    color: var(--blog-list__accent-color);
  }

  .blog-list__timeline-summary {
    font-size: 1em;
    color: var(--blog-list__text-light);
    margin-bottom: 20px;
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
    text-overflow: ellipsis;
  }

  .blog-list__timeline-read-more {
    display: inline-block;
    background-color: var(--blog-list__accent-color);
    color: var(--blog-list__primary-bg);
    padding: 10px 20px;
    border-radius: 5px;
    text-decoration: none;
    font-weight: bold;
    transition: background-color 0.3s ease, color 0.3s ease;
  }

  .blog-list__timeline-read-more:hover {
    background-color: #FFD700;
    color: var(--blog-list__primary-bg);
  }

  @media (min-width: 768px) {
    .blog-list__timeline-container::before {
      left: 50%;
    }

    .blog-list__timeline-item {
      max-width: 900px;
      margin-left: auto;
      margin-right: auto;
    }

    .blog-list__timeline-content-wrapper {
      max-width: 42%;
    }

    .blog-list__timeline-item:nth-child(odd) .blog-list__timeline-content-wrapper {
      margin-left: auto;
      margin-right: calc(50% + 30px);
      text-align: right;
    }

    .blog-list__timeline-item:nth-child(even) .blog-list__timeline-content-wrapper {
      margin-right: auto;
      margin-left: calc(50% + 30px);
      text-align: left;
    }

    .blog-list__timeline-marker {
      left: 50%;
    }
    
    .blog-list__timeline-item:nth-child(odd) .blog-list__timeline-content-wrapper::after {
      content: '';
      position: absolute;
      top: 25px;
      right: -15px;
      border-style: solid;
      border-width: 10px 0 10px 15px;
      border-color: transparent transparent transparent var(--blog-list__secondary-bg);
    }

    .blog-list__timeline-item:nth-child(even) .blog-list__timeline-content-wrapper::after {
      content: '';
      position: absolute;
      top: 25px;
      left: -15px;
      border-style: solid;
      border-width: 10px 15px 10px 0;
      border-color: transparent var(--blog-list__secondary-bg) transparent transparent;
    }
  }

  @media (min-width: 1024px) {
    .blog-list__heading {
      font-size: 3em;
    }

    .blog-list__timeline-content-wrapper {
      max-width: 450px;
    }
  }

  @media (max-width: 767px) {
    .blog-list {
      padding-left: 15px;
      padding-right: 15px;
    }

    .blog-list__heading {
      font-size: 2em;
    }

    .blog-list__description {
      font-size: 1em;
    }

    .blog-list__timeline-container::before {
      left: 20px;
      transform: translateX(0);
    }

    .blog-list__timeline-item {
      margin-left: 0;
      margin-right: 0;
      margin-bottom: 30px;
    }

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

    .blog-list__timeline-content-wrapper {
      margin-left: 60px;
      max-width: none;
      width: auto;
      text-align: left;
    }

    .blog-list__timeline-content-wrapper::after {
      content: '';
      position: absolute;
      top: 25px;
      left: -15px;
      border-style: solid;
      border-width: 10px 15px 10px 0;
      border-color: transparent var(--blog-list__secondary-bg) transparent transparent;
    }

    .blog-list__timeline-date {
      text-align: left;
    }
  }