/* Blog Editorial - Clean, no-AI-slop design */
/* Used by /blog/*.html */

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

:root {
  --color-ink: #1a1a2e;
  --color-ink-light: #333;
  --color-ink-muted: #666;
  --color-ink-faint: #999;
  --color-surface: #fafafa;
  --color-card: #ffffff;
  --color-border: #e5e5e5;
  --color-accent: #1a1a2e;
  --color-accent-light: #f0f0f0;
}

body {
  font-family: 'Inter', system-ui, sans-serif;
  font-size: 1rem;
  line-height: 1.75;
  color: var(--color-ink-light);
  background: var(--color-surface);
  -webkit-font-smoothing: antialiased;
}

.container {
  max-width: 720px;
  margin: 0 auto;
  padding: 3rem 1.5rem;
}

/* Header */
article-header {
  margin-bottom: 3rem;
}

.article-meta {
  display: flex;
  align-items: center;
  gap: 1rem;
  margin-bottom: 1.5rem;
  font-size: 0.875rem;
  color: var(--color-ink-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.article-meta-divider {
  width: 1px;
  height: 1rem;
  background: var(--color-border);
}

h1 {
  font-size: 2.5rem;
  font-weight: 800;
  line-height: 1.15;
  color: var(--color-ink);
  letter-spacing: -0.02em;
}

/* Article Body */
article {
  background: var(--color-card);
  padding: 3rem;
  border-radius: 2px;
  border: 1px solid var(--color-border);
}

article p {
  margin-bottom: 1.5rem;
  color: var(--color-ink-light);
}

article h2 {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--color-ink);
  margin: 3rem 0 1rem;
  padding-bottom: 0.75rem;
  border-bottom: 1px solid var(--color-border);
  letter-spacing: -0.01em;
}

article h2:first-child {
  margin-top: 0;
}

article h3 {
  font-size: 1.125rem;
  font-weight: 600;
  color: var(--color-ink);
  margin: 2rem 0 0.75rem;
}

article ul, article ol {
  margin: 1rem 0 1.5rem 1.25rem;
}

article li {
  margin-bottom: 0.5rem;
  color: var(--color-ink-light);
}

article strong {
  font-weight: 600;
  color: var(--color-ink);
}

article a {
  color: var(--color-accent);
  text-decoration: underline;
  text-underline-offset: 2px;
  text-decoration-thickness: 1px;
}

article a:hover {
  text-decoration-thickness: 2px;
}

article blockquote {
  border-left: 2px solid var(--color-accent);
  padding-left: 1.25rem;
  margin: 1.5rem 0;
  color: var(--color-ink-muted);
  font-style: italic;
}

/* Table of Contents */
.toc {
  background: var(--color-card);
  border: 1px solid var(--color-border);
  padding: 1.5rem;
  margin-bottom: 3rem;
}

.toc-title {
  font-weight: 700;
  font-size: 0.875rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--color-ink-muted);
  margin-bottom: 1rem;
}

.toc ul {
  list-style: none;
  margin: 0;
  padding: 0;
}

.toc li {
  margin: 0.5rem 0;
  padding-left: 1rem;
  position: relative;
}

.toc li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.6em;
  width: 4px;
  height: 4px;
  background: var(--color-ink-muted);
  border-radius: 50%;
}

.toc a {
  color: var(--color-ink-light);
  text-decoration: none;
  font-weight: 500;
  font-size: 0.9375rem;
}

.toc a:hover {
  color: var(--color-ink);
  text-decoration: underline;
}

/* Highlight */
.highlight {
  background: var(--color-accent-light);
  padding: 1rem 1.25rem;
  margin: 1.5rem 0;
  border-left: 2px solid var(--color-accent);
  font-size: 0.9375rem;
  color: var(--color-ink-light);
}

/* Table */
table {
  width: 100%;
  border-collapse: collapse;
  margin: 1.5rem 0;
  font-size: 0.9375rem;
}

th, td {
  padding: 0.875rem 1rem;
  border: 1px solid var(--color-border);
  text-align: left;
}

th {
  background: var(--color-ink);
  color: white;
  font-weight: 600;
  font-size: 0.8125rem;
  text-transform: uppercase;
  letter-spacing: 0.03em;
}

td {
  color: var(--color-ink-light);
}

tr:nth-child(even) {
  background: var(--color-surface);
}

/* CTA */
.cta-box {
  background: var(--color-ink);
  color: white;
  padding: 2.5rem;
  margin: 3rem 0;
  text-align: center;
}

.cta-box h3 {
  color: white;
  border: none;
  font-size: 1.375rem;
  margin-bottom: 0.75rem;
}

.cta-box p {
  color: #ccc;
  margin-bottom: 1.25rem;
  font-size: 0.9375rem;
}

.btn {
  display: inline-block;
  background: white;
  color: var(--color-ink);
  font-weight: 600;
  padding: 0.875rem 2rem;
  text-decoration: none;
  font-size: 1rem;
  transition: background 0.2s;
}

.btn:hover {
  background: var(--color-surface);
  text-decoration: none;
}

/* Author Footer */
.author-section {
  margin-top: 3rem;
  padding-top: 2rem;
  border-top: 1px solid var(--color-border);
  display: flex;
  align-items: center;
  gap: 1rem;
}

.author-section img {
  width: 48px;
  height: 48px;
  border-radius: 50%;
}

.author-section .author-name {
  font-weight: 600;
  color: var(--color-ink);
}

.author-section .author-title {
  font-size: 0.8125rem;
  color: var(--color-ink-muted);
}

/* Page Footer */
footer {
  margin-top: 3rem;
  padding-top: 2rem;
  border-top: 1px solid var(--color-border);
  text-align: center;
  color: var(--color-ink-faint);
  font-size: 0.8125rem;
}

footer p {
  margin-bottom: 0.5rem;
}

footer a {
  color: var(--color-ink-muted);
}

/* Responsive */
@media (max-width: 640px) {
  .container { padding: 2rem 1.25rem; }
  h1 { font-size: 1.75rem; }
  article { padding: 1.5rem; }
  .cta-box { padding: 2rem 1.5rem; }
  table { font-size: 0.8125rem; }
  th, td { padding: 0.75rem; }
}