:root {
  --max-width: 720px;
  --bg: #ffffff;
  --text: #1a1a1a;
  --muted: #6b6b6b;
  --border: #e6e6e6;
  --accent: #1d4ed8;
  --card-bg: #f7f7f8;
  --radius: 10px;
}

* { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  color: var(--text);
  background: var(--bg);
  line-height: 1.65;
  font-size: 17px;
}

a { color: var(--accent); text-decoration: none; overflow-wrap: break-word; }
a:hover { text-decoration: underline; }

img, svg { max-width: 100%; height: auto; display: block; }

.wrap {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 20px;
}

/* Header / nav */
header.site-header {
  border-bottom: 1px solid var(--border);
  padding: 18px 0;
}
header.site-header .wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
}
.site-title {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--text);
}
.site-title:hover { text-decoration: none; opacity: 0.85; }
.site-logo { display: block; height: 32px; width: auto; max-width: 220px; }
.site-favicon { display: block; height: 28px; width: 28px; flex: none; border-radius: 6px; }
nav.main-nav ul {
  list-style: none;
  display: flex;
  gap: 20px;
  margin: 0;
  padding: 0;
}
nav.main-nav a {
  color: var(--text);
  font-weight: 500;
}

/* Main content */
main { padding: 32px 0 48px; min-height: 60vh; }

h1, h2, h3, h4 { line-height: 1.3; }
h1 { font-size: 2rem; margin: 0 0 8px; }
article h1 { font-size: 1.9rem; }

.post-meta {
  color: var(--muted);
  font-size: 0.9rem;
  margin-bottom: 28px;
}
.post-meta .updated { font-style: italic; }

article.post-content p { margin: 1.1em 0; }
article.post-content pre {
  background: var(--card-bg);
  padding: 14px 16px;
  border-radius: var(--radius);
  overflow-x: auto;
}
article.post-content code {
  background: var(--card-bg);
  padding: 0.15em 0.4em;
  border-radius: 4px;
  font-size: 0.9em;
}
article.post-content pre code { background: none; padding: 0; }
article.post-content blockquote {
  border-left: 3px solid var(--accent);
  margin: 1.2em 0;
  padding: 0.2em 1em;
  color: var(--muted);
}

/* Post grid (home + blog index) — modern 3-column card layout */
.post-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin: 0;
  padding: 0;
}
.post-card {
  display: flex;
  flex-direction: column;
  background: var(--card-bg);
  border-radius: var(--radius);
  padding: 20px;
  border: 1px solid var(--border);
}
.post-card h2 { font-size: 1.1rem; margin: 0 0 8px; line-height: 1.35; }
.post-card h2 a { color: var(--text); }
.post-card h2 a:hover { text-decoration: none; opacity: 0.85; }
.post-card .post-meta { margin-bottom: 10px; }
.post-card .excerpt { color: var(--muted); margin: 0 0 14px; flex: 1; font-size: 0.95rem; }
.post-card .read-more { font-weight: 600; font-size: 0.9rem; align-self: flex-start; }

/* Category badges — shown on post cards and at the top of each post */
.post-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 0 0 14px;
}
.post-card .post-tags { margin: 0 0 10px; }
article.post-content > .post-tags { margin: 0 0 24px; }
.tag-badge {
  display: inline-block;
  background: #fff;
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 3px 12px;
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--accent);
}
.tag-badge:hover { background: var(--card-bg); text-decoration: none; }

.load-more-wrap { display: flex; justify-content: center; margin: 36px 0 12px; }
.load-more-btn {
  font: inherit;
  font-weight: 600;
  color: var(--text);
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 12px 28px;
  cursor: pointer;
}
.load-more-btn:hover { background: var(--border); }

@media (max-width: 900px) {
  .post-grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 600px) {
  .post-grid { grid-template-columns: 1fr; }
}

/* Author bio box */
.author-bio {
  display: flex;
  gap: 14px;
  align-items: flex-start;
  background: var(--card-bg);
  border-radius: var(--radius);
  padding: 18px;
  margin: 40px 0 32px;
}
.author-bio .avatar {
  flex: none;
  width: 52px;
  height: 52px;
  border-radius: 50%;
  background: var(--accent);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 1.1rem;
}
.author-bio h3 { margin: 0 0 4px; font-size: 1rem; }
.author-bio p { margin: 0; color: var(--muted); font-size: 0.95rem; }
.author-social {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 10px;
}
.author-social a { font-weight: 600; font-size: 0.9rem; }

/* Related posts */
.related-posts { margin: 20px 0 40px; }
.related-posts h3 {
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--muted);
  margin-bottom: 12px;
}
.related-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
}
.related-grid a {
  display: block;
  background: var(--card-bg);
  border-radius: var(--radius);
  padding: 14px 16px;
  color: var(--text);
  font-weight: 600;
  font-size: 0.95rem;
}
.related-grid a:hover { text-decoration: none; opacity: 0.85; }

/* Ad slot (AdSense) */
.ad-slot { margin: 28px 0; text-align: center; }

/* Footer */
footer.site-footer {
  border-top: 1px solid var(--border);
  padding: 24px 0 40px;
  color: var(--muted);
  font-size: 0.9rem;
}
footer.site-footer .wrap {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 10px;
}
footer.site-footer ul {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  margin: 0;
  padding: 0;
}
footer.site-footer a { color: var(--muted); }

/* Tablet / small desktop: tighten side padding a little */
@media (max-width: 700px) {
  .wrap { padding: 0 18px; }
  main { padding: 24px 0 40px; }
}

/* Mobile */
@media (max-width: 480px) {
  body { font-size: 16px; }
  .wrap { padding: 0 16px; }
  main { padding: 20px 0 36px; }

  h1 { font-size: 1.5rem; }
  article h1 { font-size: 1.4rem; }
  h2 { font-size: 1.2rem; }

  header.site-header { padding: 14px 0; }
  header.site-header .wrap { flex-direction: column; align-items: flex-start; gap: 10px; }
  nav.main-nav ul { gap: 16px; padding: 2px 0; }
  nav.main-nav a { display: inline-block; padding: 4px 0; } /* bigger tap target */

  .post-grid { gap: 16px; }
  .post-card { padding: 16px; }
  .author-bio { flex-direction: column; align-items: flex-start; padding: 16px; margin: 32px 0 24px; }
  .related-grid { grid-template-columns: 1fr; }

  article.post-content pre { padding: 12px; font-size: 0.85em; }
  article.post-content, .post-list, .related-posts { overflow-wrap: break-word; word-wrap: break-word; }

  footer.site-footer { padding: 20px 0 32px; }
  footer.site-footer .wrap { flex-direction: column; gap: 14px; }
  footer.site-footer ul { gap: 12px 16px; }
}

/* Very small phones */
@media (max-width: 340px) {
  .wrap { padding: 0 14px; }
  h1 { font-size: 1.35rem; }
}