*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  background: #fff;
  font-family: 'Source Sans 3', Georgia, sans-serif;
  color: #111;
  font-size: 15px;
  line-height: 1.6;
}

.page {
  max-width: 780px;
  margin: 0 auto;
  padding: 3rem 2.5rem 5rem;
}

/* BACK BUTTON */
.back {
  position: fixed;
  top: 1.2rem;
  left: 1.5rem;
  font-family: 'Source Sans 3', sans-serif;
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  text-decoration: none;
  color: #aaa;
  transition: color 0.15s;
  z-index: 101;
}

.back:hover {
  color: #111;
}

/* HEADER */
.page-header {
  margin-bottom: 1.5rem;
}

.page-header h1 {
  font-family: 'EB Garamond', Georgia, serif;
  font-size: 2rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: #111;
  margin-bottom: 0.3rem;
}

.page-header .subtitle {
  font-family: 'EB Garamond', Georgia, serif;
  font-size: 1rem;
  font-style: italic;
  color: #666;
}

hr.thick {
  border: none;
  border-top: 2px solid #111;
  margin: 1rem 0 0;
}

/* ARTICLE LIST */
.articles {
  margin-top: 2rem;
  display: flex;
  flex-direction: column;
}

.article {
  padding: 2rem 0;
  border-bottom: 0.5px solid #ddd;
}

.article:last-child {
  border-bottom: none;
}

.article-meta {
  display: flex;
  align-items: center;
  gap: 1rem;
  margin-bottom: 0.6rem;
}

.article-date {
  font-family: 'Source Sans 3', sans-serif;
  font-size: 0.72rem;
  color: #aaa;
  letter-spacing: 0.06em;
}

.article-tags {
  display: flex;
  gap: 0.4rem;
  flex-wrap: wrap;
}

.tag {
  font-family: 'Source Sans 3', sans-serif;
  font-size: 0.65rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: #888;
  border: 0.5px solid #ddd;
  padding: 0.15rem 0.5rem;
  border-radius: 2px;
}

.article-title {
  font-family: 'EB Garamond', Georgia, serif;
  font-size: 1.3rem;
  font-weight: 600;
  color: #111;
  line-height: 1.3;
  margin-bottom: 0.5rem;
}

.todo {
  font-family: 'Source Sans 3', sans-serif;
  font-size: 0.65rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: #aaa;
  vertical-align: middle;
  margin-left: 0.6rem;
}

.article-summary {
  font-size: 0.88rem;
  color: #555;
  line-height: 1.7;
  margin-bottom: 1rem;
}

/* ARTICLE BODY — visible when expanded */
.article-body {
  display: none;
  font-size: 0.88rem;
  color: #333;
  line-height: 1.8;
  border-left: 2px solid #111;
  padding-left: 1.25rem;
  margin-bottom: 1rem;
}

.article-body p {
  margin-bottom: 0.75rem;
}

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

.article-body code {
  font-family: 'Courier New', monospace;
  font-size: 0.82rem;
  background: #f5f5f5;
  padding: 0.1rem 0.35rem;
  border-radius: 2px;
  color: #333;
}

.article-body pre {
  background: #f5f5f5;
  padding: 1rem 1.25rem;
  border-radius: 3px;
  overflow-x: auto;
  margin: 0.75rem 0;
  font-size: 0.8rem;
  font-family: 'Courier New', monospace;
  line-height: 1.6;
}

.article-body h3 {
  font-family: 'Source Sans 3', sans-serif;
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: #111;
  margin: 1.25rem 0 0.5rem;
  padding-bottom: 0.2rem;
  border-bottom: 1px solid #eee;
}

.article-body ul {
  list-style: disc;
  margin-left: 1.2rem;
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
  margin-bottom: 0.75rem;
}

/* READ MORE / CLOSE toggle */
.toggle-btn {
  background: none;
  border: none;
  cursor: pointer;
  font-family: 'Source Sans 3', sans-serif;
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: #111;
  padding: 0;
  display: flex;
  align-items: center;
  gap: 0.4rem;
  transition: opacity 0.15s;
}

.toggle-btn:hover {
  opacity: 0.6;
}

.toggle-arrow {
  display: inline-block;
  transition: transform 0.2s;
  font-size: 0.8rem;
}

.toggle-btn.open .toggle-arrow {
  transform: rotate(90deg);
}

/* FOOTER */
.page-footer {
  margin-top: 3rem;
  padding-top: 0.65rem;
  border-top: 0.5px solid #ccc;
  display: flex;
  justify-content: space-between;
  font-size: 0.72rem;
  color: #aaa;
}

@media (max-width: 560px) {
  .page { padding: 3rem 1.5rem 4rem; }
  .article-meta { flex-direction: column; align-items: flex-start; gap: 0.4rem; }
}

@media print {
  .back { display: none; }
  .article-body { display: block !important; }
  .toggle-btn { display: none; }
}