/* ==========================================================================
   ARTICLE LAYOUT & TYPOGRAPHY — Medium-inspired, Editorial, Calm
   ========================================================================== */

/* Structure */
.article-page {
  background: var(--bg);
  color: var(--fg);
  font-family: var(--f-body);
  line-height: 1.8;
  font-size: clamp(1.05rem, 2.2vw, 1.2rem); /* Generous readability scale */
  transition: background var(--t-normal), color var(--t-normal);
}

.article-container {
  max-width: 760px; /* Optimal reading line length (approx 70-80 chars) */
  margin: 0 auto;
  padding: 5rem 1.5rem 8rem;
  box-sizing: border-box;
}

/* Header Section */
.article-header {
  margin-bottom: 3.5rem;
  border-bottom: 1px solid var(--border);
  padding-bottom: 2.5rem;
  transition: border-color var(--t-normal);
}

.nav-blog-link {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  transition: color var(--t-fast);
}
.nav-blog-link:hover {
  color: var(--accent);
}
.nav-blog-arrow {
  color: var(--accent);
  font-size: 0.88em;
  transition: transform var(--t-fast);
  display: inline-block;
}
.nav-blog-link:hover .nav-blog-arrow {
  transform: translate(3px, -3px);
}

.article-page-title {
  font-family: var(--f-head);
  font-size: clamp(2rem, 5vw, 3.2rem);
  font-weight: 700;
  line-height: 1.15;
  letter-spacing: -0.03em;
  color: var(--fg);
  margin-bottom: 1rem;
}

.article-page-subtitle {
  font-family: var(--f-body);
  font-size: clamp(1.15rem, 2.5vw, 1.4rem);
  font-weight: 400;
  color: var(--muted);
  line-height: 1.45;
  margin-bottom: 2rem;
}

/* Author & Meta Row */
.article-author-card {
  display: flex;
  align-items: center;
  gap: 0.85rem;
}

.article-author-img {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  object-fit: cover;
  border: 1px solid var(--border);
}

.article-author-info {
  display: flex;
  flex-direction: column;
}

.article-author-name {
  font-weight: 600;
  font-size: 0.95rem;
  color: var(--fg);
}

.article-meta-row {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.82rem;
  color: var(--muted);
  font-family: var(--f-body);
}

.article-meta-sep {
  color: var(--border);
}

/* Article Body Content styling */
.article-body {
  color: var(--fg);
  font-family: var(--f-body);
}

/* Headings */
.article-body h1,
.article-body h2,
.article-body h3,
.article-body h4 {
  font-family: var(--f-head);
  color: var(--fg);
  font-weight: 700;
  line-height: 1.25;
  letter-spacing: -0.02em;
  margin-top: 3rem;
  margin-bottom: 1rem;
}

.article-body h1 { font-size: clamp(1.8rem, 4vw, 2.4rem); }
.article-body h2 { font-size: clamp(1.45rem, 3.2vw, 1.85rem); border-bottom: 1px solid var(--border); padding-bottom: 0.5rem; }
.article-body h3 { font-size: clamp(1.2rem, 2.5vw, 1.45rem); }
.article-body h4 { font-size: 1.15rem; }

/* Paragraphs and spacing */
.article-body p {
  margin-bottom: 1.75rem;
  color: var(--fg);
}

/* Bold & Italic */
.article-body strong {
  font-weight: 600;
}

.article-body em {
  font-style: italic;
}

/* Blockquotes */
.article-body blockquote {
  border-left: 3px solid var(--accent);
  padding: 0.5rem 0 0.5rem 1.5rem;
  margin: 2rem 0;
  font-style: italic;
  color: var(--muted);
  font-size: 1.15rem;
}

.article-body blockquote p {
  margin-bottom: 0;
}

.article-body blockquote cite {
  display: block;
  font-size: 0.85rem;
  font-family: var(--f-mono);
  color: var(--accent);
  margin-top: 0.5rem;
  font-style: normal;
}

/* Lists */
.article-body ul,
.article-body ol {
  margin: 1.5rem 0;
  padding-left: 1.75rem;
}

.article-body li {
  margin-bottom: 0.65rem;
}

/* Code Blocks & Inline Code */
.article-body code {
  font-family: var(--f-mono);
  font-size: 0.85em;
  background: var(--surface);
  color: var(--fg);
  padding: 0.2rem 0.4rem;
  border-radius: 4px;
  border: 1px solid var(--border);
  word-break: break-word;
}

.article-body pre {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 1.2rem;
  margin: 2rem 0;
  overflow-x: auto;
}

.article-body pre code {
  background: none;
  border: none;
  padding: 0;
  border-radius: 0;
  font-size: 0.85rem;
  line-height: 1.6;
  color: inherit;
  word-break: normal;
  display: block;
}

/* Tables */
.article-body table {
  width: 100%;
  border-collapse: collapse;
  margin: 2.5rem 0;
  font-size: 0.95rem;
}

.article-body th,
.article-body td {
  padding: 0.75rem 1rem;
  border-bottom: 1px solid var(--border);
  text-align: left;
}

.article-body th {
  font-family: var(--f-head);
  font-weight: 700;
  background: var(--surface);
}

.article-body tr:hover td {
  background: var(--surface-hv);
  transition: background var(--t-fast);
}

/* Dividers */
.article-body hr {
  border: none;
  border-top: 1px solid var(--border);
  margin: 3rem 0;
}

/* Images */
.article-body img {
  width: 100%;
  height: auto;
  border-radius: 6px;
  border: 1px solid var(--border);
  margin: 2.5rem 0;
}

.article-body a {
  color: var(--accent);
  text-decoration: none;
  border-bottom: 1px solid var(--border);
  transition: color var(--t-fast), border-color var(--t-fast);
}

.article-body a:hover {
  color: var(--fg);
  border-bottom-color: var(--accent);
}

/* Back button */
.article-back-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-family: var(--f-mono);
  font-size: 0.85rem;
  color: var(--muted);
  margin-bottom: 3rem;
  transition: color var(--t-fast), transform var(--t-fast);
}

.article-back-btn:hover {
  color: var(--accent);
  transform: translateX(-3px);
}

.article-back-btn svg {
  width: 16px;
  height: 16px;
  fill: none;
  stroke: currentColor;
  stroke-width: 2.2;
}

/* Responsive adjustment */
@media (max-width: 720px) {
  .article-container {
    padding: 3rem 1.25rem 5rem;
  }
  .article-header {
    margin-bottom: 2.5rem;
    padding-bottom: 1.75rem;
  }
  .article-body h1,
  .article-body h2,
  .article-body h3 {
    margin-top: 2rem;
  }
}