body {
  display: flex;
  flex-direction: column;
  min-height: 100vh;
  margin: 0;
}

.wrapper {
  flex: 1;
  display: flex;
  flex-direction: column;
}

.articles-section {
  padding: 58px 0;
  flex: 1;
}

.timeline {
  text-align: center;
  margin-bottom: 35px;
}

.timeline-link {
  font-size: 16px;
  font-weight: 500;
  color: var(--text-color);
  text-decoration: none;
  margin: 0 10px;
  transition: var(--transition);
}

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

.timeline-link.active {
  color: var(--primary-color);
}

.articles-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 12px;
}

.articles-block {
  border: 1px solid #ddd;
  border-radius: var(--border-radius);
  padding: 18px;
  background-color: var(--light-color);
  cursor: pointer;
  transition: var(--transition);
  height: 360px;
  display: flex;
  flex-direction: column;
}

.articles-block:hover {
  transform: translateY(-5px);
  box-shadow: var(--box-shadow);
}

.articles-block .article-date {
  font-size: 14px;
  color: #888;
  margin-bottom: 4px;
}

.articles-block .article-title {
  font-size: 18px;
  font-weight: 500;
  color: var(--text-color);
  margin-bottom: 7px;
  overflow: hidden;
  text-overflow: ellipsis;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  line-clamp: 2; 
  -webkit-box-orient: vertical;
}

.articles-block .article-short-text {
  font-size: 14px;
  color: #666;
  overflow: hidden;
  text-overflow: ellipsis;
  display: -webkit-box;
  -webkit-line-clamp: 8;
  line-clamp: 3; 
  -webkit-box-orient: vertical;
}

/* Modal Styles */
.modal {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-color: rgba(0, 0, 0, 0.5);
  z-index: 1000;
  justify-content: center;
  align-items: center;
}

.modal-content {
  background-color: var(--light-color);
  width: 90%;
  max-width: 800px;
  max-height: 90vh;
  padding: 30px;
  border-radius: 8px;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.2);
  position: relative;
  overflow-y: auto;
  font-family: 'Roboto', sans-serif;
}

.modal.open {
  display: flex;
}

.close-btn {
  position: absolute;
  top: 20px;
  right: 20px;
  font-size: 32px;
  cursor: pointer;
  color: var(--text-color);
  transition: color 0.3s ease;
}

.close-btn:hover {
  color: var(--primary-color);
}

.article-title {
  font-size: 24px;
  font-weight: 700;
  color: var(--dark-color);
  margin-bottom: 12px;
}

.article-date {
  font-size: 16px;
  color: #888;
  margin-bottom: 20px;
}

.article-full-text {
  color: var(--text-color);
}

.article-full-text h3 {
  font-size: 24px;
  font-weight: 700;
  color: var(--dark-color);
  margin-bottom: 20px;
}

.article-full-text h4 {
  font-size: 18px;
  font-weight: 600;
  color: var(--dark-color);
  margin: 20px 0 10px;
}

.article-full-text p {
  font-size: 16px;
  line-height: 1.8;
  color: var(--text-color);
  margin-bottom: 20px;
}

.article-full-text ul,
.article-full-text ol {
  font-size: 16px;
  line-height: 1.8;
  color: var(--text-color);
  margin: 15px 0;
  padding-left: 30px;
}

.article-full-text li {
  margin-bottom: 10px;
}

.article-full-text table {
  width: 100%;
  border-collapse: collapse;
  margin: 20px 0;
  font-size: 14px;
  color: var(--text-color);
}

.article-full-text th,
.article-full-text td {
  border: 1px solid #e0e0e0;
  padding: 10px;
  text-align: left;
}

.article-full-text th {
  background-color: #f5f5f5;
  font-weight: 600;
}

.article-full-text tr:nth-child(even) {
  background-color: #fafafa;
}

/* Footer */
.footer {
  flex-shrink: 0;
}

/* Responsive Design */
@media (max-width: 1024px) {
  .articles-grid {
    grid-template-columns: repeat(3, 1fr);
  }
  .articles-block {
    height: 400px;
  }
  .modal-content {
    width: 90%;
    padding: 25px;
  }
  .article-title {
    font-size: 22px;
  }
  .article-date {
    font-size: 14px;
  }
  .article-full-text h3 {
    font-size: 22px;
  }
  .article-full-text h4 {
    font-size: 16px;
  }
  .article-full-text p,
  .article-full-text ul,
  .article-full-text ol {
    font-size: 14px;
  }
  .article-full-text table {
    font-size: 12px;
  }
}

@media (max-width: 768px) {
  .articles-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .articles-block {
    height: 400px;
  }
  .modal-content {
    width: 95%;
    padding: 20px;
  }
  .article-title {
    font-size: 20px;
  }
  .article-date {
    font-size: 14px;
  }
  .article-full-text h3 {
    font-size: 20px;
  }
  .article-full-text h4 {
    font-size: 14px;
  }
  .article-full-text p,
  .article-full-text ul,
  .article-full-text ol {
    font-size: 12px;
  }
  .article-full-text table {
    font-size: 12px;
    display: block;
    overflow-x: auto;
    white-space: nowrap;
  }
}

@media (max-width: 480px) {
  .articles-grid {
    grid-template-columns: 1fr;
  }
  .articles-block {
    height: 400px;
  }
  .articles-block .article-title {
    font-size: 16px;
  }
  .articles-block .article-short-text {
    font-size: 13px;
  }
  .modal-content {
    width: 98%;
    padding: 15px;
  }
  .close-btn {
    font-size: 28px;
    top: 15px;
    right: 15px;
  }
  .article-title {
    font-size: 18px;
  }
  .article-date {
    font-size: 12px;
    margin-bottom: 15px;
  }
  .article-full-text h3 {
    font-size: 18px;
    margin-bottom: 15px;
  }
  .article-full-text h4 {
    font-size: 12px;
    margin: 15px 0 8px;
  }
  .article-full-text p,
  .article-full-text ul,
  .article-full-text ol {
    font-size: 10px;
    line-height: 1.6;
    margin-bottom: 15px;
  }
  .article-full-text li {
    margin-bottom: 8px;
  }
  .article-full-text table {
    font-size: 10px;
    display: block;
    overflow-x: auto;
  }
  .article-full-text th,
  .article-full-text td {
    padding: 8px;
  }
}