:root {
    --primary-color: #007bff;
    --secondary-color: #6c757d;
    --text-color-dark: #212529;
    --text-color-medium: #495057;
    --text-color-light: #6c757d;
    --background-light: #f8f9fa;
    --border-color: #dee2e6;
    --card-bg: #ffffff;
    --shadow-light: rgba(0, 0, 0, 0.1);
    --shadow-hover: rgba(0, 0, 0, 0.2);
    --header-offset: 120px;
  }

  .blog-list {
    padding-top: var(--header-offset, 120px);
    padding-bottom: 40px;
    background-color: var(--background-light);
    font-family: 'Arial', sans-serif;
    color: var(--text-color-dark);
  }

  .blog-list__hero {
    text-align: center;
    padding: 40px 20px;
    background-color: #343a40;
    color: #ffffff;
    margin-bottom: 30px;
  }

  .blog-list__main-title {
    font-size: 2.5em;
    margin-bottom: 15px;
    color: #ffffff;
    line-height: 1.3;
  }

  .blog-list__description {
    font-size: 1.1em;
    max-width: 800px;
    margin: 0 auto;
    color: #e9ecef;
    line-height: 1.6;
  }

  .blog-list__timeline-container {
    position: relative;
    max-width: 960px;
    margin: 0 auto;
    padding: 0 20px;
  }

  .blog-list__timeline-container::before {
    content: '';
    position: absolute;
    top: 0;
    bottom: 0;
    left: 50%;
    width: 4px;
    background-color: var(--border-color);
    transform: translateX(-50%);
    display: none;
  }

  @media (min-width: 768px) {
    .blog-list__timeline-container::before {
      display: block;
    }
  }

  .blog-list__timeline-item {
    position: relative;
    margin-bottom: 40px;
    padding-left: 0;
  }

  @media (min-width: 768px) {
    .blog-list__timeline-item {
      display: flex;
      justify-content: space-between;
      align-items: flex-start;
      margin-bottom: 60px;
      padding-left: 60px;
    }

    .blog-list__timeline-item:nth-child(even) {
      flex-direction: row-reverse;
      padding-left: 0;
      padding-right: 60px;
    }
  }

  .blog-list__timeline-dot {
    position: absolute;
    top: 15px;
    left: -2px;
    width: 16px;
    height: 16px;
    background-color: var(--primary-color);
    border: 3px solid var(--card-bg);
    border-radius: 50%;
    z-index: 1;
    transform: translateX(-50%);
  }

  @media (min-width: 768px) {
    .blog-list__timeline-dot {
      left: 50%;
      top: 20px;
      transform: translateX(-50%);
    }
    .blog-list__timeline-item:nth-child(even) .blog-list__timeline-dot {
      left: 50%;
    }
  }

  .blog-list__timeline-date-wrapper {
    position: absolute;
    top: 0;
    left: 25px;
    font-size: 0.9em;
    color: var(--text-color-dark);
    white-space: nowrap;
    z-index: 1;
    background-color: var(--background-light);
    padding: 2px 8px;
    border-radius: 4px;
    box-shadow: 0 2px 5px rgba(0,0,0,0.05);
  }

  @media (min-width: 768px) {
    .blog-list__timeline-date-wrapper {
      position: relative;
      flex: 0 0 150px;
      text-align: right;
      left: auto;
      top: auto;
      margin-right: 30px;
      background: none;
      padding: 0;
      font-size: 1em;
      color: var(--text-color-medium);
      order: 1;
      align-self: flex-start;
      box-shadow: none;
    }
    .blog-list__timeline-item:nth-child(even) .blog-list__timeline-date-wrapper {
      text-align: left;
      margin-right: 0;
      margin-left: 30px;
      order: 2;
    }
  }

  .blog-list__card {
    background-color: var(--card-bg);
    border-radius: 10px;
    box-shadow: 0 4px 15px var(--shadow-light);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    overflow: hidden;
    margin-top: 40px;
  }

  @media (min-width: 768px) {
    .blog-list__card {
      flex: 1;
      max-width: calc(50% - 100px);
      margin-top: 0;
    }
    .blog-list__timeline-item:nth-child(even) .blog-list__card {
      order: 1;
    }
  }

  .blog-list__card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 25px var(--shadow-hover);
  }

  .blog-list__image-link {
    display: block;
    width: 100%;
    padding-bottom: 56.25%;
    position: relative;
    overflow: hidden;
    background-color: #f0f0f0;
  }

  .blog-list__image {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.3s ease;
  }

  .blog-list__card:hover .blog-list__image {
    transform: scale(1.05);
  }

  .blog-list__content {
    padding: 20px;
  }

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

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

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

  .blog-list__summary {
    font-size: 0.95em;
    color: var(--text-color-medium);
    margin-bottom: 15px;
    line-height: 1.6;
    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(--primary-color);
    color: #ffffff;
    padding: 8px 15px;
    border-radius: 5px;
    text-decoration: none;
    font-size: 0.9em;
    transition: background-color 0.3s ease;
  }

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

  @media (max-width: 767px) {
    .blog-list__main-title {
      font-size: 2em;
    }
    .blog-list__description {
      font-size: 1em;
    }
    .blog-list__timeline-container {
      padding: 0 15px;
    }
    .blog-list__timeline-container::before {
      left: 15px;
    }
    .blog-list__timeline-dot {
      left: 15px;
    }
    .blog-list__timeline-date-wrapper {
      left: 45px;
      top: 0;
    }
    .blog-list__card {
      margin-left: 45px;
      margin-top: 20px;
    }
    .blog-list__title {
      font-size: 1.2em;
    }
    .blog-list__summary {
      font-size: 0.9em;
    }
  }

  @media (min-width: 1024px) {
    .blog-list__main-title {
      font-size: 3em;
    }
    .blog-list__description {
      font-size: 1.2em;
    }
    .blog-list__timeline-container {
      padding: 0 40px;
    }
  }