/* ==========================================================================
   reidEXA — writing.css
   Styles for:
     1. writing.html — the full published writing index
     2. .writing-preview-* — the writing preview section on exa.html

   Sections:
     1. Writing hero
     2. Series section (light)
     3. Articles grid & cards
     4. Loading & error states
     5. Pipeline section (dark)
     6. Writing CTA
     7. Writing preview section (exa.html embed)
     8. Mobile (≤900px)
     9. Reduced motion
   ========================================================================== */


/* ==========================================================================
   1. Writing hero — mirrors exa-hero with "Writing" watermark behind
   ========================================================================== */

.writing-hero {
  position: relative;
  overflow: hidden;
  padding: 80px 0 120px;
  background:
    radial-gradient(1000px 680px at 12% 0%,
      hsl(var(--electric-hsl) / 0.10), transparent 60%),
    radial-gradient(900px 620px at 100% 100%,
      hsl(var(--midnight-3-hsl) / 0.82), transparent 55%),
    var(--midnight);
}
.writing-hero::before {
  content: 'EXA';
  position: absolute;
  bottom: -140px;
  right: -60px;
  font-family: var(--display);
  font-size: 560px;
  font-weight: 700;
  line-height: 0.8;
  letter-spacing: -0.06em;
  color: hsl(var(--electric-hsl) / 0.06);
  pointer-events: none;
}
.writing-hero-inner {
  position: relative;
  max-width: 840px;
}
.writing-hero-label {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 28px;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--electric);
}
.writing-hero-label::before {
  content: '';
  width: 24px;
  height: 1px;
  background: var(--electric);
}
.writing-hero-title {
  margin-bottom: 24px;
  font-family: var(--display);
  font-size: 64px;
  font-weight: 600;
  line-height: 1.02;
  letter-spacing: -0.035em;
  color: var(--white);
}
.writing-hero-title em {
  font-style: normal;
  font-weight: 700;
  color: var(--electric);
}
.writing-hero-deck {
  max-width: 680px;
  font-family: var(--display);
  font-size: 22px;
  font-weight: 500;
  line-height: 1.45;
  letter-spacing: -0.015em;
  color: var(--slate-dim);
}
.writing-hero-deck em {
  font-style: normal;
  font-weight: 600;
  color: var(--white);
}
/* Byline row — avatar + name above the label */
.writing-hero-byline {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 28px;
}
.writing-hero-avatar {
  width: 64px;
  height: 64px;
  border-radius: 50%;
  object-fit: cover;
  border: 2px solid hsl(var(--electric-hsl) / 0.40);
  box-shadow: var(--elev-dark-2);
  flex-shrink: 0;
}
.writing-hero-author {
  font-family: var(--sans);
  font-size: 14px;
  font-weight: 500;
  letter-spacing: 0.01em;
  color: var(--slate-dim);
}


/* ==========================================================================
   2. Series section — light paper surface with electric border accent
   ========================================================================== */

.series-section {
  padding: 100px 0;
  border-bottom: 1px solid var(--cloud);
  background:
    radial-gradient(800px 500px at 100% 0%,
      hsl(var(--electric-hsl) / 0.05), transparent 60%),
    radial-gradient(700px 460px at 0% 100%,
      hsl(var(--cloud-hsl) / 0.65), transparent 60%),
    var(--paper);
}
.series-label {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 12px;
  padding: 6px 14px;
  background: var(--midnight);
  border-radius: 4px;
  font-family: var(--mono);
  font-size: 10px;
  font-weight: 500;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--electric);
}


/* ==========================================================================
   3. Articles grid & cards
   ========================================================================== */

.articles-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
  margin-top: 48px;
}

.article-card {
  position: relative;
  display: flex;
  flex-direction: column;
  padding: 36px 32px;
  background: var(--white);
  border-top: 2px solid var(--electric);
  border-radius: 10px;
  box-shadow: var(--elev-2), var(--bevel-dark);
  text-decoration: none;
  transition:
    box-shadow var(--dur-base) var(--ease-out),
    transform var(--dur-base) var(--ease-out);
}
.article-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--elev-3), var(--bevel-dark);
}

.article-card-num {
  margin-bottom: 16px;
  font-family: var(--mono);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--electric);
}
.article-card-title {
  margin-bottom: 14px;
  font-family: var(--display);
  font-size: 22px;
  font-weight: 600;
  line-height: 1.2;
  letter-spacing: -0.025em;
  color: var(--midnight);
  flex: 1;
}
.article-card-deck {
  margin-bottom: 20px;
  font-size: 14px;
  font-weight: 300;
  line-height: 1.7;
  color: var(--slate);
}
.article-card-meta {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-bottom: 20px;
  font-family: var(--mono);
  font-size: 11px;
  color: var(--slate-light);
}
.article-card-meta-sep { opacity: 0.35; }
.article-card-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--mono);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--electric);
  transition: gap var(--dur-base) var(--ease-out);
}
.article-card:hover .article-card-link { gap: 14px; }

/* Tag pills inside article cards */
.article-card-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-bottom: 16px;
}
.article-tag {
  padding: 3px 10px;
  background: var(--cloud);
  border-radius: 4px;
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--slate);
}


/* ==========================================================================
   4. Loading & error states
   ========================================================================== */

.articles-loading {
  grid-column: 1 / -1;
  padding: 60px 0;
  text-align: center;
}
.articles-loading-dots {
  display: inline-flex;
  gap: 6px;
  align-items: center;
}
.articles-loading-dots span {
  display: inline-block;
  width: 8px;
  height: 8px;
  background: var(--electric);
  border-radius: 50%;
  animation: pulse-dot 1.2s infinite ease-in-out both;
}
.articles-loading-dots span:nth-child(1) { animation-delay: 0s; }
.articles-loading-dots span:nth-child(2) { animation-delay: 0.2s; }
.articles-loading-dots span:nth-child(3) { animation-delay: 0.4s; }

@keyframes pulse-dot {
  0%, 80%, 100% { transform: scale(0.6); opacity: 0.4; }
  40%           { transform: scale(1.0); opacity: 1.0; }
}

.articles-loading-text {
  margin-top: 16px;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--slate-light);
}


/* ==========================================================================
   5. Pipeline section — dark midnight, upcoming articles
   ========================================================================== */

.pipeline-section {
  padding: 100px 0;
  background:
    radial-gradient(900px 620px at 50% 0%,
      hsl(var(--electric-hsl) / 0.08), transparent 60%),
    var(--midnight);
  border-top: 1px solid var(--midnight-4);
  border-bottom: 1px solid var(--midnight-4);
}
.pipeline-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
  margin-top: 48px;
}
.pipeline-card {
  padding: 32px 28px;
  background: var(--midnight-2);
  border: 1px solid var(--midnight-4);
  border-radius: 10px;
  box-shadow: var(--elev-dark-1);
}
.pipeline-status {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  margin-bottom: 18px;
  font-family: var(--mono);
  font-size: 10px;
  font-weight: 500;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--slate-dim);
}
.pipeline-status::before {
  content: '';
  display: inline-block;
  width: 6px;
  height: 6px;
  background: hsl(var(--electric-hsl) / 0.45);
  border-radius: 50%;
}
.pipeline-series {
  margin-bottom: 8px;
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--electric);
}
.pipeline-title {
  margin-bottom: 12px;
  font-family: var(--display);
  font-size: 18px;
  font-weight: 600;
  line-height: 1.25;
  letter-spacing: -0.02em;
  color: var(--white);
}
.pipeline-desc {
  font-size: 13px;
  font-weight: 300;
  line-height: 1.65;
  color: var(--slate-dim);
}


/* ==========================================================================
   6. Writing CTA — reuses exa-cta structure
   ========================================================================== */

.writing-cta {
  padding: 100px 0;
  text-align: center;
  background:
    radial-gradient(900px 620px at 50% 0%,
      hsl(var(--electric-hsl) / 0.12), transparent 60%),
    radial-gradient(800px 500px at 50% 100%,
      hsl(var(--midnight-3-hsl) / 0.8), transparent 55%),
    var(--midnight);
}
.writing-cta-title {
  max-width: 680px;
  margin: 0 auto 20px;
  font-family: var(--display);
  font-size: 44px;
  font-weight: 600;
  line-height: 1.1;
  letter-spacing: -0.035em;
  color: var(--white);
}
.writing-cta-title em {
  font-style: normal;
  font-weight: 700;
  color: var(--electric);
}
.writing-cta-sub {
  max-width: 560px;
  margin: 0 auto 36px;
  font-size: 16px;
  font-weight: 300;
  line-height: 1.65;
  color: var(--slate-dim);
}
.writing-cta-actions {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 12px;
}


/* ==========================================================================
   7. Writing preview section — embedded on exa.html between pillars and CTA
   ========================================================================== */

.writing-preview-section {
  padding: 100px 0;
  background:
    radial-gradient(700px 460px at 0% 100%,
      hsl(var(--cloud-hsl) / 0.65), transparent 60%),
    var(--paper);
  border-top: 1px solid var(--cloud);
  border-bottom: 1px solid var(--cloud);
}
.writing-preview-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
  margin-top: 48px;
}
.writing-preview-card {
  display: flex;
  flex-direction: column;
  padding: 32px 28px;
  background: var(--white);
  border-top: 2px solid var(--electric);
  border-radius: 10px;
  box-shadow: var(--elev-2), var(--bevel-dark);
  text-decoration: none;
  transition:
    box-shadow var(--dur-base) var(--ease-out),
    transform var(--dur-base) var(--ease-out);
}
.writing-preview-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--elev-3), var(--bevel-dark);
}
.writing-preview-num {
  margin-bottom: 12px;
  font-family: var(--mono);
  font-size: 10px;
  font-weight: 500;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--electric);
}
.writing-preview-title {
  margin-bottom: 12px;
  font-family: var(--display);
  font-size: 19px;
  font-weight: 600;
  line-height: 1.25;
  letter-spacing: -0.02em;
  color: var(--midnight);
  flex: 1;
}
.writing-preview-deck {
  margin-bottom: 20px;
  font-size: 13px;
  font-weight: 300;
  line-height: 1.7;
  color: var(--slate);
}
.writing-preview-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--mono);
  font-size: 10px;
  font-weight: 500;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--electric);
  transition: gap var(--dur-base) var(--ease-out);
}
.writing-preview-card:hover .writing-preview-link { gap: 14px; }

.writing-preview-cta-row {
  margin-top: 40px;
  display: flex;
  justify-content: flex-start;
  gap: 16px;
}


/* ==========================================================================
   8. Mobile (≤900px)
   ========================================================================== */

@media (max-width: 900px) {
  .writing-hero        { padding: 60px 0 80px; }
  .writing-hero-title  { font-size: 42px; }
  .writing-hero-deck   { font-size: 18px; }
  .writing-hero::before {
    font-size: 360px;
    bottom: -90px;
    right: -40px;
  }
  .writing-hero-avatar {
    width: 48px;
    height: 48px;
  }

  .series-section      { padding: 64px 0; }
  .articles-grid       { grid-template-columns: 1fr; }
  .article-card        { padding: 28px 24px; }
  .article-card-title  { font-size: 19px; }

  .pipeline-section    { padding: 64px 0; }
  .pipeline-grid       { grid-template-columns: 1fr; }

  .writing-cta         { padding: 72px 0; }
  .writing-cta-title   { font-size: 32px; }

  .writing-preview-section { padding: 64px 0; }
  .writing-preview-grid    { grid-template-columns: 1fr; }
  .writing-preview-card    { padding: 28px 24px; }
  .writing-preview-title   { font-size: 17px; }
}


/* ==========================================================================
   9. Reduced motion
   ========================================================================== */

@media (prefers-reduced-motion: reduce) {
  .article-card,
  .article-card:hover,
  .writing-preview-card,
  .writing-preview-card:hover {
    transform: none;
    transition-duration: 0.01ms;
  }
  .articles-loading-dots span {
    animation: none;
    opacity: 1;
    transform: none;
  }
}