:root {
    --secondary-color: #3f51b5;
    --text-color: #333;
    --light-text: #757575;
    --background-color: #fff;
    --light-gray: #f5f5f5;
    --medium-gray: #e0e0e0;
    --dark-gray: #9e9e9e;
    --success-color: #4caf50;
    --error-color: #f44336;
    --border-radius: 8px;
    --box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
    --transition: all 0.3s ease;
    --header-height: 70px;
    --footer-bg: #2d2d2d;
  }

  /* Bottom Navigation */
  .bottom-navigation {
    position: fixed;
    bottom: 0;
    left: 0;
    width: 100%;
    height: 60px;
    background-color: var(--background-color);
    display: flex;
    justify-content: space-around;
    align-items: center;
    box-shadow: 0 -2px 10px rgba(0, 0, 0, 0.1);
    z-index: 1000;
  }

  .nav-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    color: var(--light-text);
    text-decoration: none;
    font-size: 12px;
    width: 20%;
    position: relative;
    transition: var(--transition);
  }

  .nav-item i {
    font-size: 22px;
    margin-bottom: 4px;
  }

  .nav-item:hover {
    color: var(--accent-color);
  }

  .nav-item.active {
    color: var(--secondary-color);
  }

  /* Blog Card */
  .blog-card {
    transition: var(--transition);
    background-color: var(--background-color);
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
  }

  .blog-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 20px rgba(0, 0, 0, 0.15);
  }

  /* Search Bar */
  .search-bar {
    border: 1px solid var(--medium-gray);
    border-radius: 9999px;
    padding: 0.5rem 1rem;
    width: 100%;
    max-width: 400px;
    outline: none;
    transition: var(--transition);
  }

  .search-bar:focus {
    border-color: var(--accent-color);
  }

  /* Pagination */
  .pagination-button {
    padding: 0.5rem 1rem;
    border: 1px solid var(--medium-gray);
    border-radius: var(--border-radius);
    transition: var(--transition);
  }

  .pagination-button:hover {
    background-color: var(--secondary-color);
    color: white;
  }

  .pagination-button:disabled {
    background-color: var(--light-gray);
    color: var(--dark-gray);
    cursor: not-allowed;
  }

  /* Back to Top Button */
  #back-to-top {
    position: fixed;
    bottom: 80px;
    right: 20px;
    background-color: var(--secondary-color);
    color: white;
    width: 40px;
    height: 40px;
    display: none;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    box-shadow: var(--box-shadow);
    transition: var(--transition);
    z-index: 1000;
  }

  #back-to-top:hover {
    background-color: var(--primary-color);
  }

  /* Loading Animation */
  .loading-spinner {
    display: inline-block;
    width: 24px;
    height: 24px;
    border: 3px solid var(--secondary-color);
    border-radius: 50%;
    border-top-color: transparent;
    animation: spin 1s linear infinite;
    margin-left: 8px;
  }

  @keyframes spin {
    to { transform: rotate(360deg); }
  }

  body {
    padding-bottom: 60px; /* Match the height of the bottom navigation bar */
    background-color: var(--light-gray);
    color: var(--text-color);
  }

  .header-logo {
    font-size: 2rem;
    font-weight: 700;
    letter-spacing: -0.5px;
    display: flex;
    align-items: center;
  }

  .In {
    color: var(--primary-color);
  }

  .scipe {
    color: var(--secondary-color);
  }

  .blogs {
    color: var(--text-color);
    margin-left: 0.3rem;
  }

  /* Category tags */
  .category-tag {
    background-color: var(--accent-color);
    color: white;
  }

  /* Footer */
  footer {
    background-color: var(--footer-bg);
  }

  /* Error message */
  #error {
    color: var(--error-color);
  }