/* ===== ARTICLE PAGE ===== */
.article-container {
  max-width: 900px;
  margin: 60px auto;
  padding: 0 20px;
  line-height: 1.8;
  font-family: "Segoe UI", Tahoma, Geneva, Verdana, sans-serif;
}

.article-container h1 {
  font-size: 42px;
  margin-bottom: 10px;
  line-height: 1.2;
}

.article-meta {
  color: #777;
  margin-bottom: 30px;
  font-size: 16px;
}

.article-container h2 {
  margin-top: 40px;
  font-size: 32px;
  color: #0a66c2;
}

.article-container h3 {
  margin-top: 30px;
  font-size: 26px;
  color: #0a66c2;
}

.article-container p {
  margin: 20px 0;
  font-size: 18px;
}

.article-container ul {
  margin: 20px 0;
  padding-left: 20px;
}

.article-container li {
  margin: 10px 0;
  font-size: 18px;
}

.article-image {
  width: 100%;
  border-radius: 8px;
  margin: 30px 0;
}

/* ===== CODE BLOCK ===== */
pre {
  background-color: #f3f3f3;
  padding: 20px;
  overflow-x: auto;
  border-radius: 6px;
  margin: 20px 0;
}

pre code {
  font-family: "Courier New", Courier, monospace;
  font-size: 16px;
}

/* ===== QUOTE ===== */
blockquote {
  margin: 30px 0;
  padding: 20px;
  background: #f3f3f3;
  border-left: 5px solid #0a66c2;
  font-style: italic;
}

/* ===== DIAGRAM PLACEHOLDER ===== */
.diagram-placeholder {
  text-align: center;
  color: #555;
  background: #f9f9f9;
  border: 1px dashed #aaa;
  padding: 20px;
  margin: 30px 0;
  border-radius: 6px;
  font-style: italic;
}

/* ===== MOBILE ===== */
@media (max-width: 768px) {
  .article-container h1 {
    font-size: 32px;
  }

  .article-container h2 {
    font-size: 26px;
  }

  .article-container h3 {
    font-size: 22px;
  }

  .article-container p,
  .article-container li {
    font-size: 16px;
  }
}