/* =========================================================
   PayMullet — Blog styles
   Scope: /blog/index.html + /blog/<slug>.html
   Depends on tokens in styles.css
   ========================================================= */

/* ---------- Index page ---------- */

.blog-hero {
  padding: calc(var(--space-24) + 40px) 0 var(--space-16);
  border-bottom: 1px solid var(--color-border);
  background:
    radial-gradient(1200px 420px at 10% 0%, color-mix(in srgb, var(--color-primary) 10%, transparent), transparent 60%),
    linear-gradient(180deg, var(--color-surface-2) 0%, var(--color-bg) 100%);
}
.blog-hero__inner { max-width: var(--container, 1280px); margin: 0 auto; padding: 0 var(--space-6); }
.blog-hero__eyebrow {
  display: inline-flex; align-items: center; gap: 8px;
  font-family: var(--font-mono, 'JetBrains Mono', monospace);
  font-size: 0.72rem; letter-spacing: 0.18em; text-transform: uppercase;
  color: var(--color-primary); padding: 6px 12px;
  border: 1px solid var(--color-primary-border); border-radius: var(--radius-full);
  background: var(--color-primary-soft); margin-bottom: var(--space-5);
}
.blog-hero__eyebrow::before { content: ''; width: 6px; height: 6px; border-radius: 50%; background: var(--color-primary); }
.blog-hero h1 {
  font-family: var(--font-display);
  font-size: clamp(2.2rem, 5vw + 1rem, 4.2rem);
  line-height: 1.02; letter-spacing: -0.035em;
  color: var(--color-text); margin: 0 0 var(--space-5);
  max-width: 22ch;
}
.blog-hero__lede {
  max-width: 62ch; font-size: 1.15rem; line-height: 1.55;
  color: var(--color-text-2); margin: 0;
}

/* filter chips */
.blog-filters {
  display: flex; flex-wrap: wrap; gap: 10px;
  padding: var(--space-6) 0 var(--space-2);
  border-bottom: 1px solid var(--color-border);
  margin-bottom: var(--space-10);
  max-width: var(--container, 1280px); margin-inline: auto;
  padding-inline: var(--space-6);
}
.blog-chip {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 8px 16px; border-radius: var(--radius-full);
  border: 1px solid var(--color-border);
  background: var(--color-surface);
  color: var(--color-text-2); font-size: 0.88rem; font-weight: 500;
  cursor: pointer; user-select: none;
  transition:
    background 180ms cubic-bezier(0.16, 1, 0.3, 1),
    color 180ms cubic-bezier(0.16, 1, 0.3, 1),
    border-color 180ms cubic-bezier(0.16, 1, 0.3, 1);
}
.blog-chip:hover { border-color: var(--color-primary-border); color: var(--color-text); }
.blog-chip[aria-pressed='true'] {
  background: var(--color-primary);
  color: #fff; border-color: var(--color-primary);
}
.blog-chip__count {
  font-family: var(--font-mono, 'JetBrains Mono', monospace);
  font-size: 0.72rem; opacity: 0.7;
  padding: 2px 6px; border-radius: var(--radius-full);
  background: color-mix(in srgb, currentColor 15%, transparent);
}

/* grid */
.blog-grid {
  display: grid;
  grid-template-columns: repeat(12, 1fr);
  gap: var(--space-8);
  max-width: var(--container, 1280px);
  margin: 0 auto var(--space-24);
  padding: 0 var(--space-6);
}
.blog-card {
  grid-column: span 4;
  display: flex; flex-direction: column;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  text-decoration: none; color: inherit;
  transition:
    transform 180ms cubic-bezier(0.16, 1, 0.3, 1),
    border-color 180ms cubic-bezier(0.16, 1, 0.3, 1),
    box-shadow 180ms cubic-bezier(0.16, 1, 0.3, 1);
}
.blog-card:hover {
  transform: translateY(-2px);
  border-color: var(--color-primary-border);
  box-shadow: var(--shadow-md);
}
.blog-card:active { transform: translateY(0); }
.blog-card--featured { grid-column: span 8; }
.blog-card--featured .blog-card__cover { aspect-ratio: 16 / 9; }

.blog-card__cover {
  aspect-ratio: 4 / 3;
  background: linear-gradient(135deg, var(--color-primary-soft) 0%, color-mix(in srgb, var(--color-primary) 15%, var(--color-surface-2)) 100%);
  position: relative; overflow: hidden;
  border-bottom: 1px solid var(--color-border);
}
.blog-card__cover svg { position: absolute; inset: 0; width: 100%; height: 100%; }

.blog-card__body { padding: var(--space-6); display: flex; flex-direction: column; gap: var(--space-3); flex: 1; }
.blog-card__meta {
  display: flex; gap: 12px; align-items: center;
  font-family: var(--font-mono, 'JetBrains Mono', monospace);
  font-size: 0.72rem; letter-spacing: 0.1em; text-transform: uppercase;
  color: var(--color-text-muted);
}
.blog-card__cat {
  color: var(--color-primary); font-weight: 600;
  padding: 2px 8px; border-radius: var(--radius-full);
  background: var(--color-primary-soft); border: 1px solid var(--color-primary-border);
  letter-spacing: 0.08em;
}
.blog-card__title {
  font-family: var(--font-display); font-weight: 700;
  font-size: 1.45rem; line-height: 1.18;
  letter-spacing: -0.02em; color: var(--color-text);
  margin: 0;
}
.blog-card--featured .blog-card__title { font-size: 2rem; letter-spacing: -0.03em; }
.blog-card__excerpt {
  color: var(--color-text-2); font-size: 0.98rem; line-height: 1.5;
  margin: 0; flex: 1;
  display: -webkit-box; -webkit-line-clamp: 3; -webkit-box-orient: vertical; overflow: hidden;
}
.blog-card__footer {
  display: flex; justify-content: space-between; align-items: center;
  margin-top: auto; padding-top: var(--space-3);
  border-top: 1px dashed var(--color-border);
  font-size: 0.85rem; color: var(--color-text-muted);
}
.blog-card__arrow {
  color: var(--color-primary); font-weight: 600;
  transition: transform 180ms cubic-bezier(0.16, 1, 0.3, 1);
}
.blog-card:hover .blog-card__arrow { transform: translateX(3px); }

/* empty state after filter */
.blog-grid--empty::after {
  content: 'No posts in this category yet.';
  grid-column: 1 / -1;
  text-align: center; padding: var(--space-16);
  color: var(--color-text-muted);
}

@media (max-width: 980px) {
  .blog-card, .blog-card--featured { grid-column: span 6; }
  .blog-card--featured .blog-card__title { font-size: 1.55rem; }
}
@media (max-width: 640px) {
  .blog-card, .blog-card--featured { grid-column: span 12; }
  .blog-hero { padding: calc(var(--space-20) + 24px) 0 var(--space-10); }
}

/* ---------- Article page ---------- */

.article {
  max-width: 760px;
  margin: 0 auto;
  padding: calc(var(--space-24) + 20px) var(--space-6) var(--space-16);
}
.article__breadcrumb {
  display: flex; gap: 6px; align-items: center;
  font-family: var(--font-mono, 'JetBrains Mono', monospace);
  font-size: 0.72rem; letter-spacing: 0.12em; text-transform: uppercase;
  color: var(--color-text-muted); margin-bottom: var(--space-6);
}
.article__breadcrumb a { color: var(--color-text-muted); text-decoration: none; transition: color 180ms ease; }
.article__breadcrumb a:hover { color: var(--color-primary); }
.article__breadcrumb span { color: var(--color-text-faint); }

.article__eyebrow {
  display: inline-flex; align-items: center; gap: 8px;
  font-family: var(--font-mono, 'JetBrains Mono', monospace);
  font-size: 0.72rem; letter-spacing: 0.16em; text-transform: uppercase;
  color: var(--color-primary);
  padding: 6px 12px;
  background: var(--color-primary-soft);
  border: 1px solid var(--color-primary-border);
  border-radius: var(--radius-full);
  margin-bottom: var(--space-4);
}

.article__title {
  font-family: var(--font-display); font-weight: 700;
  font-size: clamp(2rem, 4vw + 0.8rem, 3.6rem);
  line-height: 1.04; letter-spacing: -0.035em;
  color: var(--color-text); margin: 0 0 var(--space-5);
}
.article__deck {
  font-size: 1.25rem; line-height: 1.5; color: var(--color-text-2);
  margin: 0 0 var(--space-8);
  font-style: italic; font-family: 'Charter', 'Iowan Old Style', Georgia, serif;
}
.article__meta {
  display: flex; flex-wrap: wrap; gap: var(--space-4);
  padding: var(--space-4) 0;
  border-top: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
  font-size: 0.88rem; color: var(--color-text-muted);
  margin-bottom: var(--space-10);
}
.article__meta strong { color: var(--color-text); font-weight: 600; }
.article__meta > span { display: inline-flex; align-items: center; gap: 6px; }
.article__meta > span::before { content: '·'; color: var(--color-text-faint); margin-right: 10px; }
.article__meta > span:first-child::before { display: none; }

.article__hero {
  aspect-ratio: 16 / 9;
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: linear-gradient(135deg, var(--color-primary-soft) 0%, color-mix(in srgb, var(--color-primary) 15%, var(--color-surface-2)) 100%);
  border: 1px solid var(--color-border);
  margin-bottom: var(--space-12);
  position: relative;
}
.article__hero svg { position: absolute; inset: 0; width: 100%; height: 100%; }

.article__body {
  font-size: 1.08rem; line-height: 1.7; color: var(--color-text);
  font-family: 'Charter', 'Iowan Old Style', 'Georgia', serif;
}
.article__body h2 {
  font-family: var(--font-display); font-weight: 700;
  font-size: 1.9rem; line-height: 1.15; letter-spacing: -0.025em;
  margin: var(--space-12) 0 var(--space-4); color: var(--color-text);
}
.article__body h3 {
  font-family: var(--font-display); font-weight: 600;
  font-size: 1.35rem; line-height: 1.25; letter-spacing: -0.015em;
  margin: var(--space-8) 0 var(--space-3); color: var(--color-text);
}
.article__body p { margin: 0 0 var(--space-5); }
.article__body > p:first-of-type::first-line { font-variant: small-caps; letter-spacing: 0.03em; }
.article__body a {
  color: var(--color-primary); text-decoration: underline;
  text-decoration-color: color-mix(in srgb, var(--color-primary) 35%, transparent);
  text-underline-offset: 3px;
  transition: text-decoration-color 180ms ease;
}
.article__body a:hover { text-decoration-color: var(--color-primary); }
.article__body ul, .article__body ol { padding-left: 1.4em; margin: 0 0 var(--space-5); }
.article__body li { margin-bottom: var(--space-2); }
.article__body blockquote {
  border-left: 3px solid var(--color-primary);
  padding: var(--space-3) 0 var(--space-3) var(--space-6);
  margin: var(--space-8) 0;
  font-size: 1.2rem; line-height: 1.5;
  color: var(--color-text);
  background: linear-gradient(90deg, var(--color-primary-soft), transparent);
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
}
.article__body code {
  font-family: var(--font-mono, 'JetBrains Mono', monospace);
  font-size: 0.85em;
  padding: 1px 6px; border-radius: 4px;
  background: var(--color-surface-2); border: 1px solid var(--color-border);
  color: var(--color-primary-deep);
}
[data-theme='dark'] .article__body code { color: var(--color-primary); }
.article__body strong { font-weight: 700; color: var(--color-text); }
.article__body em { color: var(--color-text); }

.article__callout {
  display: block;
  margin: var(--space-8) 0;
  padding: var(--space-6) var(--space-6);
  border-radius: var(--radius-lg);
  background: var(--color-primary-soft);
  border: 1px solid var(--color-primary-border);
  font-family: var(--font-body);
  font-size: 1rem; line-height: 1.55; color: var(--color-text);
}
.article__callout strong { color: var(--color-primary-deep); }
[data-theme='dark'] .article__callout strong { color: var(--color-primary); }

/* CTA block at end of article */
.article-cta {
  margin: var(--space-16) auto 0;
  max-width: 760px;
  padding: var(--space-10);
  border-radius: var(--radius-xl);
  background:
    radial-gradient(400px 200px at 80% 0%, color-mix(in srgb, var(--color-primary) 20%, transparent), transparent 70%),
    linear-gradient(135deg, var(--color-primary-deep) 0%, var(--color-primary) 100%);
  color: #fff;
  text-align: center; position: relative; overflow: hidden;
}
.article-cta::before {
  content: ''; position: absolute; inset: 0;
  background-image: repeating-linear-gradient(
    45deg, transparent 0 10px,
    rgba(255,255,255,0.03) 10px 11px
  );
  pointer-events: none;
}
.article-cta h3 {
  font-family: var(--font-display); font-weight: 700;
  font-size: 1.8rem; line-height: 1.2; letter-spacing: -0.02em;
  margin: 0 0 var(--space-3);
}
.article-cta p { margin: 0 0 var(--space-6); font-size: 1.05rem; opacity: 0.92; font-family: var(--font-body); }
.article-cta .btn {
  background: #fff; color: var(--color-primary-deep);
  border: none; font-weight: 600;
}
.article-cta .btn:hover { background: color-mix(in srgb, #fff 90%, var(--color-primary) 10%); }

/* FAQ */
.article-faq {
  max-width: 760px; margin: var(--space-16) auto 0;
  padding: 0 var(--space-6);
}
.article-faq h2 {
  font-family: var(--font-display); font-weight: 700;
  font-size: 1.9rem; letter-spacing: -0.02em;
  margin: 0 0 var(--space-6); color: var(--color-text);
}
.article-faq details {
  border-top: 1px solid var(--color-border);
  padding: var(--space-4) 0;
}
.article-faq details:last-child { border-bottom: 1px solid var(--color-border); }
.article-faq summary {
  cursor: pointer; list-style: none;
  display: flex; justify-content: space-between; gap: var(--space-4);
  font-family: var(--font-display); font-weight: 600;
  font-size: 1.1rem; color: var(--color-text);
  padding-right: var(--space-2);
}
.article-faq summary::-webkit-details-marker { display: none; }
.article-faq summary::after {
  content: '+';
  font-size: 1.4rem; font-weight: 400;
  color: var(--color-primary);
  transition: transform 180ms cubic-bezier(0.16, 1, 0.3, 1);
}
.article-faq details[open] summary::after { transform: rotate(45deg); }
.article-faq details > p, .article-faq details > div {
  margin-top: var(--space-3);
  color: var(--color-text-2); line-height: 1.6;
  font-family: var(--font-body);
}

/* related posts strip */
.article-related {
  max-width: 1120px; margin: var(--space-20) auto 0;
  padding: var(--space-16) var(--space-6) var(--space-4);
  border-top: 1px solid var(--color-border);
}
.article-related__label {
  font-family: var(--font-mono, 'JetBrains Mono', monospace);
  font-size: 0.72rem; letter-spacing: 0.16em; text-transform: uppercase;
  color: var(--color-text-muted); margin: 0 0 var(--space-5);
}
.article-related__grid {
  display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--space-6);
}
.article-related__grid .blog-card { grid-column: auto; }
.article-related__grid .blog-card__cover { aspect-ratio: 4 / 3; }
.article-related__grid .blog-card__title { font-size: 1.15rem; }
@media (max-width: 860px) { .article-related__grid { grid-template-columns: 1fr; } }

/* TOC on desktop */
.article-wrap {
  display: grid;
  grid-template-columns: 1fr minmax(auto, 760px) 1fr;
  column-gap: var(--space-8);
  max-width: 1200px; margin: 0 auto;
}
.article-wrap > .article { grid-column: 2; max-width: none; padding-inline: 0; }
.article-toc {
  grid-column: 3; position: sticky; top: calc(var(--space-20) + 20px);
  height: max-content;
  padding-top: calc(var(--space-24) + 80px);
  font-size: 0.85rem; line-height: 1.5;
  color: var(--color-text-muted);
  padding-right: var(--space-6);
}
.article-toc__label {
  font-family: var(--font-mono, 'JetBrains Mono', monospace);
  font-size: 0.7rem; letter-spacing: 0.16em; text-transform: uppercase;
  margin-bottom: var(--space-3); color: var(--color-text-muted);
}
.article-toc ol {
  list-style: none; padding: 0; margin: 0;
  border-left: 1px solid var(--color-border);
}
.article-toc li { padding: 6px 0 6px var(--space-4); margin-left: -1px; border-left: 2px solid transparent; }
.article-toc a { color: var(--color-text-muted); text-decoration: none; }
.article-toc a:hover { color: var(--color-text); }
.article-toc li.is-active { border-left-color: var(--color-primary); }
.article-toc li.is-active a { color: var(--color-primary); font-weight: 600; }

@media (max-width: 1100px) {
  .article-wrap { grid-template-columns: 1fr minmax(auto, 760px) 1fr; }
  .article-toc { display: none; }
  .article-wrap > .article { padding-inline: var(--space-6); }
}

@media (prefers-reduced-motion: reduce) {
  .blog-card, .blog-chip, .article-faq summary::after, .blog-card__arrow {
    transition: none !important;
  }
}