/* ==========================================================================
   Writing section — shared styles for /writing/ pages
   (series hub, articles, author, writing index)
   Uses tokens from variables.css; namespaced as .writing-*
   ========================================================================== */

/* ---- Hero ---- */
.writing-hero {
  padding-top: calc(var(--space-32) + var(--space-8));
  padding-bottom: var(--space-16);
  background: var(--gradient-hero);
  position: relative;
  overflow: hidden;
}

.writing-hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background:
    radial-gradient(circle at 75% 25%, rgba(252, 79, 100, 0.12) 0%, transparent 50%),
    radial-gradient(circle at 20% 80%, rgba(123, 198, 252, 0.08) 0%, transparent 55%);
  pointer-events: none;
}

.writing-hero .container {
  position: relative;
  z-index: 1;
  max-width: 760px;
}

.writing-eyebrow {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  color: var(--color-sky-blue);
  margin-bottom: var(--space-6);
  letter-spacing: 0.04em;
}

.writing-hero h1 {
  font-size: clamp(2rem, 4.5vw, 3rem);
  letter-spacing: -0.02em;
  margin-bottom: var(--space-6);
  max-width: 26ch;
  line-height: var(--leading-tight);
}

/* Brand accent — use for the "AI" in "Extreme AI Programming" and similar. */
.writing-accent {
  color: var(--color-coral);
}

.writing-hero-meta {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--text-muted);
  letter-spacing: 0.04em;
  margin-top: var(--space-4);
}

.writing-hero-meta a {
  color: var(--text-secondary);
}

.writing-hero-sub {
  font-size: var(--text-lg);
  color: var(--text-secondary);
  max-width: 62ch;
  line-height: var(--leading-snug);
}

/* ---- Article / long-form body ---- */
.writing-body {
  background: var(--bg-primary);
  padding: var(--space-16) 0 var(--space-20);
}

.writing-body .container {
  max-width: 720px;
}

.writing-prose {
  font-family: 'Lora', Georgia, serif;
  font-size: 1.1875rem;
  line-height: 1.72;
  color: rgba(242, 244, 248, 0.84);
}

/* Hub/landing pages: announcement copy reads as continuation of the hero,
   not as article body — keep sans-serif so the font doesn't jump. */
.writing-prose--hub {
  font-family: var(--font-body);
  font-size: var(--text-lg);
  line-height: var(--leading-normal);
  color: var(--text-secondary);
}

.writing-prose p {
  margin: 0 0 var(--space-6);
  max-width: 62ch;
}

.writing-prose a {
  color: var(--color-sky-blue);
  border-bottom: 1px solid rgba(123, 198, 252, 0.3);
  text-decoration: none;
  transition: border-color var(--transition-fast);
}

.writing-prose a:hover {
  border-bottom-color: var(--color-sky-blue);
}

/* Buttons inside prose should not inherit link styling. */
.writing-prose a.btn {
  color: #ffffff;
  border-bottom: 0;
}

.writing-prose a.btn:hover {
  color: #ffffff;
  border-bottom: 0;
}

.writing-prose em {
  font-style: italic;
  color: rgba(242, 244, 248, 0.92);
}

.writing-prose strong {
  color: var(--text-primary);
  font-weight: var(--weight-semibold);
}

.writing-prose h2 {
  font-family: var(--font-display);
  font-size: var(--text-2xl);
  font-weight: var(--weight-semibold);
  color: var(--text-primary);
  margin: var(--space-12) 0 var(--space-4);
  letter-spacing: -0.015em;
  line-height: var(--leading-snug);
}

.writing-prose h3 {
  font-family: var(--font-display);
  font-size: var(--text-xl);
  font-weight: var(--weight-semibold);
  color: var(--text-primary);
  margin: var(--space-10) 0 var(--space-4);
  letter-spacing: -0.01em;
}

.writing-prose blockquote {
  border-left: 3px solid var(--color-coral);
  padding: var(--space-2) 0 var(--space-2) var(--space-6);
  margin: var(--space-10) 0;
  font-style: italic;
  color: var(--text-primary);
  max-width: 58ch;
}

.writing-prose ul, .writing-prose ol {
  margin: 0 0 var(--space-6);
  padding-left: var(--space-6);
  max-width: 62ch;
}

.writing-prose li {
  margin-bottom: var(--space-2);
}

.writing-prose hr {
  border: 0;
  border-top: 1px solid var(--border);
  margin: var(--space-10) auto;
  max-width: 62ch;
}

.writing-signature {
  font-family: 'Lora', Georgia, serif;
  font-size: var(--text-lg);
  color: var(--text-primary);
  margin: var(--space-10) 0 var(--space-4);
}

/* ---- Disclosure footer (per-article) ---- */
.writing-disclosure {
  margin-top: var(--space-10);
  padding: var(--space-8) 0 0;
  border-top: 1px solid var(--border-subtle);
  font-family: var(--font-body);
  font-size: var(--text-sm);
  font-style: italic;
  color: var(--text-secondary);
  line-height: var(--leading-normal);
  max-width: 62ch;
}

.writing-disclosure a {
  color: var(--text-secondary);
  border-bottom: 1px solid rgba(242, 244, 248, 0.2);
  text-decoration: none;
}

.writing-disclosure a:hover {
  border-bottom-color: var(--color-sky-blue);
  color: var(--color-sky-blue);
}

/* ---- Prev / Next series navigation ---- */
.writing-pagination {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-4);
  margin-top: var(--space-16);
  padding-top: var(--space-8);
  border-top: 1px solid var(--border-subtle);
}

.writing-pagination a,
.writing-pagination span {
  display: block;
  padding: var(--space-4) var(--space-6);
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  color: var(--text-secondary);
  transition: border-color var(--transition-base), background var(--transition-base);
}

.writing-pagination a:hover {
  border-color: var(--color-sky-blue);
  background: var(--bg-elevated);
}

.writing-pagination span {
  opacity: 0.5;
  cursor: default;
}

.writing-pagination-label {
  display: block;
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--text-muted);
  margin-bottom: var(--space-2);
  letter-spacing: 0.04em;
}

.writing-pagination-title {
  font-family: var(--font-display);
  font-size: var(--text-base);
  color: var(--text-primary);
  font-weight: var(--weight-medium);
  line-height: var(--leading-snug);
}

.writing-pagination-next {
  text-align: right;
}

/* ---- Series table of contents ---- */
.writing-toc {
  margin: var(--space-8) 0 var(--space-12);
  border-top: 1px solid var(--border-subtle);
}

.writing-toc-item {
  display: grid;
  grid-template-columns: 70px 1fr auto;
  gap: var(--space-4);
  padding: var(--space-4) 0;
  border-bottom: 1px solid var(--border-subtle);
  align-items: baseline;
}

.writing-toc-item--forthcoming {
  opacity: 0.55;
}

.writing-toc-number {
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  color: var(--color-coral);
  letter-spacing: 0.04em;
}

.writing-toc-title {
  font-family: var(--font-display);
  font-size: var(--text-lg);
  color: var(--text-primary);
  font-weight: var(--weight-medium);
  line-height: var(--leading-snug);
}

a.writing-toc-title {
  border-bottom: 0;
  text-decoration: none;
}

a.writing-toc-title:hover {
  color: var(--color-sky-blue);
}

.writing-toc-status {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--text-muted);
  letter-spacing: 0.04em;
  white-space: nowrap;
}

.writing-toc-status--published {
  color: var(--color-sky-blue);
}

/* ---- Subscribe block ---- */
.writing-subscribe {
  background: var(--color-dark-teal);
  border-radius: var(--radius-xl);
  padding: var(--space-12) var(--space-8);
  margin: var(--space-12) auto;
  text-align: center;
  position: relative;
  overflow: hidden;
  max-width: 640px;
}

.writing-subscribe::before {
  content: '';
  position: absolute;
  inset: 0;
  background:
    radial-gradient(circle at 30% 20%, rgba(252, 79, 100, 0.14) 0%, transparent 55%),
    radial-gradient(circle at 75% 80%, rgba(123, 198, 252, 0.1) 0%, transparent 50%);
  pointer-events: none;
}

.writing-subscribe > * {
  position: relative;
  z-index: 1;
}

.writing-subscribe h2 {
  font-family: var(--font-display);
  font-size: var(--text-2xl);
  margin: 0 0 var(--space-3);
  color: var(--text-primary);
  letter-spacing: -0.015em;
}

.writing-subscribe p {
  font-size: var(--text-base);
  color: rgba(242, 244, 248, 0.78);
  margin: 0 auto var(--space-6);
  max-width: 44ch;
  line-height: var(--leading-normal);
}

.writing-subscribe-alt {
  display: block;
  margin-top: var(--space-4);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--text-muted);
  letter-spacing: 0.04em;
}

.writing-subscribe-alt a {
  color: var(--text-secondary);
  border-bottom: 1px dotted var(--text-muted);
  text-decoration: none;
}

/* ---- Writing index (listing page) ---- */
.writing-index-list {
  display: grid;
  gap: 0;
  margin-top: var(--space-4);
}

.writing-index-item {
  padding: var(--space-8) 0;
  border-bottom: 1px solid var(--border-subtle);
}

.writing-index-item:first-child {
  padding-top: 0;
}

.writing-index-item:last-child {
  border-bottom: 0;
}

.writing-index-eyebrow {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--color-sky-blue);
  letter-spacing: 0.04em;
  margin-bottom: var(--space-3);
  text-transform: none;
}

.writing-index-title {
  font-family: var(--font-display);
  font-size: var(--text-2xl);
  font-weight: var(--weight-semibold);
  color: var(--text-primary);
  margin: 0 0 var(--space-3);
  letter-spacing: -0.015em;
  line-height: var(--leading-snug);
}

.writing-index-title a {
  color: inherit;
  text-decoration: none;
  border-bottom: 0;
}

.writing-index-title a:hover {
  color: var(--color-sky-blue);
}

.writing-index-description {
  font-size: var(--text-base);
  color: var(--text-secondary);
  line-height: var(--leading-normal);
  max-width: 64ch;
  margin: 0 0 var(--space-2);
}

.writing-index-meta {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--text-muted);
  letter-spacing: 0.04em;
}

/* ---- Author page ---- */
.writing-author-bio {
  font-size: var(--text-lg);
  color: var(--text-secondary);
  line-height: var(--leading-normal);
  max-width: 64ch;
}

.writing-author-bio p {
  margin-bottom: var(--space-6);
}

.writing-author-bio a {
  color: var(--color-sky-blue);
  border-bottom: 1px solid rgba(123, 198, 252, 0.3);
  text-decoration: none;
}

.writing-author-bio a:hover {
  border-bottom-color: var(--color-sky-blue);
}

.writing-author-links {
  display: flex;
  gap: var(--space-6);
  flex-wrap: wrap;
  margin-top: var(--space-10);
  padding-top: var(--space-6);
  border-top: 1px solid var(--border-subtle);
}

.writing-author-links a {
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  color: var(--color-sky-blue);
  letter-spacing: 0.04em;
  text-decoration: none;
  border-bottom: 1px solid rgba(123, 198, 252, 0.3);
}

.writing-author-links a:hover {
  border-bottom-color: var(--color-sky-blue);
}

.writing-author-links a.writing-author-social {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 34px;
  height: 34px;
  padding: 0;
  border: 1px solid rgba(123, 198, 252, 0.3);
  border-radius: 50%;
  color: var(--color-sky-blue);
  transition: border-color var(--transition-fast), background var(--transition-fast);
}

.writing-author-links a.writing-author-social:hover {
  border-color: var(--color-sky-blue);
  background: rgba(123, 198, 252, 0.08);
}

.writing-author-links a.writing-author-social svg {
  display: block;
}

/* ---- Responsive ---- */
@media (max-width: 640px) {
  .writing-pagination {
    grid-template-columns: 1fr;
  }
  .writing-pagination-next {
    text-align: left;
  }
  .writing-toc-item {
    grid-template-columns: 50px 1fr;
    gap: var(--space-3);
  }
  .writing-toc-status {
    grid-column: 2;
    margin-top: var(--space-1);
  }
  .writing-subscribe {
    padding: var(--space-8) var(--space-6);
  }
}