:root {
      --primary-color: #007bff; 
      --secondary-color: #6c757d; 
      --text-color: #333333; 
      --light-text-color: #666666; 
      --background-color: #f8f9fa; 
      --card-background: #ffffff; 
      --border-color: #e9ecef; 
      --shadow-color: rgba(0, 0, 0, 0.1); 
      --header-offset: 120px; 
    }

    @media (prefers-color-scheme: dark) {
      :root {
        --text-color: #e0e0e0;
        --light-text-color: #cccccc;
        --background-color: #1a1a1a;
        --card-background: #2c2c2c;
        --border-color: #444444;
        --shadow-color: rgba(0, 0, 0, 0.3);
      }
    }

    .blog-list {
      font-family: 'Helvetica Neue', Arial, sans-serif;
      background-color: var(--background-color);
      color: var(--text-color);
      padding-bottom: 40px;
      min-height: 100vh;
      padding-top: var(--header-offset);
    }

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

    .blog-list__timeline-wrapper {
      position: relative;
      padding: 20px 0;
      max-width: 900px;
      margin: 0 auto;
    }

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

    .blog-list__item {
      display: flex;
      flex-direction: column;
      background-color: var(--card-background);
      border-radius: 12px;
      box-shadow: 0 4px 12px var(--shadow-color);
      margin-bottom: 30px;
      overflow: hidden;
      transition: transform 0.3s ease, box-shadow 0.3s ease;
      position: relative;
      z-index: 1;
    }

    .blog-list__item:hover {
      transform: translateY(-5px);
      box-shadow: 0 8px 20px var(--shadow-color);
    }

    .blog-list__cover-image {
      width: 100%;
      height: 225px;
      object-fit: cover;
      border-top-left-radius: 12px;
      border-top-right-radius: 12px;
      display: block;
    }

    .blog-list__item-content {
      padding: 20px;
    }

    .blog-list__title {
      font-size: 20px;
      font-weight: bold;
      margin-top: 15px;
      margin-bottom: 10px;
      line-height: 1.4;
      color: var(--text-color);
    }

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

    .blog-list__title-link:hover {
      color: #0056b3; 
    }

    .blog-list__summary {
      font-size: 15px;
      color: var(--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__meta {
      display: flex;
      justify-content: space-between;
      align-items: center;
      font-size: 13px;
      color: var(--secondary-color);
      margin-top: 15px;
    }

    .blog-list__date {
      font-size: 14px;
      color: var(--secondary-color);
    }

    .blog-list__read-more {
      display: inline-block;
      background-color: var(--primary-color);
      color: #ffffff;
      padding: 10px 18px;
      border-radius: 8px;
      text-decoration: none;
      font-weight: bold;
      transition: background-color 0.3s ease;
      font-size: 15px;
    }

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

    @media (min-width: 768px) {
      .blog-list__item {
        width: calc(50% - 30px); 
        margin-bottom: 40px;
      }

      .blog-list__item:nth-child(odd) {
        margin-right: calc(50% + 30px); 
        align-self: flex-start;
      }

      .blog-list__item:nth-child(even) {
        margin-left: calc(50% + 30px); 
        align-self: flex-end;
      }

      .blog-list__item::before {
        content: '';
        position: absolute;
        top: 25px; 
        width: 16px;
        height: 16px;
        background-color: var(--primary-color);
        border-radius: 50%;
        border: 3px solid var(--card-background);
        z-index: 2;
        transform: translateX(-50%);
      }

      .blog-list__item:nth-child(odd)::before {
        right: -48px; 
        left: auto;
      }

      .blog-list__item:nth-child(even)::before {
        left: -48px; 
        right: auto;
      }

      .blog-list__timeline-wrapper {
        display: flex;
        flex-direction: column;
        align-items: center;
      }
    }

    @media (max-width: 767px) {
      .blog-list__container {
        padding: 15px;
      }
      .blog-list__item {
        margin-bottom: 20px;
      }
      .blog-list__cover-image {
        height: 180px;
      }
      .blog-list__title {
        font-size: 18px;
      }
      .blog-list__summary {
        font-size: 14px;
        -webkit-line-clamp: 4;
      }
      .blog-list__read-more {
        padding: 8px 15px;
        font-size: 14px;
      }
      .blog-list__timeline-wrapper::before {
        display: none; 
      }
    }

    @media (min-width: 1024px) {
      .blog-list__container {
        padding: 30px;
      }
      .blog-list__item {
        width: calc(50% - 40px); 
      }
      .blog-list__item:nth-child(odd) {
        margin-right: calc(50% + 40px);
      }
      .blog-list__item:nth-child(even) {
        margin-left: calc(50% + 40px);
      }
      .blog-list__item::before {
        top: 30px; 
      }
      .blog-list__item:nth-child(odd)::before {
        right: -58px;
      }
      .blog-list__item:nth-child(even)::before {
        left: -58px;
      }
    }