/* ============================================================
   Arai Blog — extends ../styles.css
   ============================================================ */

/* ---- Listing page hero ---- */
.blog-hero {
  padding: clamp(72px, 10vw, 120px) 0 clamp(40px, 5vw, 64px);
  position: relative; overflow: hidden;
}
.blog-hero__bg {
  position: absolute; inset: 0; pointer-events: none;
  background:
    radial-gradient(ellipse 50% 60% at 20% 10%, rgba(77,168,255,.18), transparent 70%),
    radial-gradient(ellipse 60% 70% at 90% 20%, rgba(30,99,204,.14), transparent 70%);
}
.blog-hero__inner { position: relative; max-width: 820px; }
.blog-hero h1 {
  font-size: clamp(32px, 4.5vw, 52px); line-height: 1.08;
  font-weight: 800; letter-spacing: -0.02em;
  margin-bottom: 18px;
}
.blog-hero p {
  font-size: clamp(16px, 1.4vw, 18px); line-height: 1.6;
  color: var(--arai-fg-muted); margin: 0;
  max-width: 680px;
}

/* ---- Category filter pills ---- */
.cat-row {
  display: flex; flex-wrap: wrap; gap: 8px;
  margin-top: 32px;
}
.cat-pill {
  display: inline-flex; align-items: center;
  padding: 8px 16px;
  font-size: 13px; font-weight: 600;
  color: var(--arai-fg-muted);
  background: rgba(255,255,255,.03);
  border: 1px solid var(--arai-bg-line);
  border-radius: var(--r-pill);
  cursor: pointer;
  transition: all .15s ease;
}
.cat-pill:hover { color: #fff; border-color: var(--arai-bg-line-2); }
.cat-pill.is-active {
  color: #051022; background: var(--arai-blue-bright); border-color: var(--arai-blue-bright);
}

/* ---- Post grid ---- */
.posts-section {
  padding: 32px 0 clamp(72px, 9vw, 120px);
}
.posts-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}
@media (max-width: 960px) { .posts-grid { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 620px) { .posts-grid { grid-template-columns: 1fr; } }

.post-card {
  display: flex; flex-direction: column;
  background: var(--arai-bg-card);
  border: 1px solid var(--arai-bg-line);
  border-radius: var(--r-lg);
  overflow: hidden;
  text-decoration: none;
  transition: transform .2s ease, border-color .2s ease, box-shadow .2s ease;
}
.post-card:hover {
  transform: translateY(-3px);
  border-color: var(--arai-bg-line-2);
  box-shadow: var(--sh-card);
}
.post-card__cover {
  aspect-ratio: 16 / 9;
  position: relative;
  background: linear-gradient(135deg, var(--cover-from, #0E1730), var(--cover-to, #1E63CC));
  overflow: hidden;
}
/* Hide legacy gradient overlay + glyph when a [data-art] illustration takes over */
.post-card__cover[data-art]::after { display: none; }
.post-card__cover[data-art] .post-card__glyph { display: none; }
.post-card__cover[data-art] > svg { position: absolute; inset: 0; }
.post-card__cover::after {
  content: "";
  position: absolute; inset: 0;
  background:
    radial-gradient(circle at 80% 20%, rgba(255,255,255,.18), transparent 50%),
    linear-gradient(135deg, rgba(255,255,255,.04), transparent 60%);
}
.post-card__cat {
  position: absolute; top: 14px; left: 14px;
  font-size: 11px; font-weight: 700; letter-spacing: 0.12em; text-transform: uppercase;
  color: #fff;
  padding: 5px 10px;
  background: rgba(0,0,0,.35);
  border: 1px solid rgba(255,255,255,.16);
  border-radius: var(--r-pill);
  backdrop-filter: blur(8px);
  z-index: 2;
}
.post-card__glyph {
  position: absolute; right: -8px; bottom: -16px;
  font-family: "JetBrains Mono", monospace;
  font-size: 96px; font-weight: 700; line-height: 1;
  color: rgba(255,255,255,.10);
  letter-spacing: -0.04em;
  z-index: 1;
}
.post-card__body {
  padding: 22px 24px 24px;
  display: flex; flex-direction: column; gap: 10px; flex: 1;
}
.post-card__title {
  font-size: 17px; line-height: 1.35; font-weight: 700;
  color: var(--arai-fg); margin: 0;
  letter-spacing: -0.01em;
}
.post-card__excerpt {
  font-size: 13.5px; line-height: 1.55; color: var(--arai-fg-faint);
  margin: 0;
}
.post-card__meta {
  margin-top: auto; padding-top: 12px;
  display: flex; justify-content: space-between; align-items: center;
  font-size: 12px; color: var(--arai-fg-faint);
  border-top: 1px solid var(--arai-bg-line);
}
.post-card__meta time { font-family: "JetBrains Mono", monospace; }

/* ---- Post detail page ---- */
.article {
  padding: clamp(56px, 7vw, 88px) 0 clamp(56px, 7vw, 88px);
  position: relative;
}
.article__bg {
  position: absolute; inset: 0; pointer-events: none;
  background: radial-gradient(ellipse 60% 50% at 50% 0%, rgba(77,168,255,.10), transparent 70%);
}

.article__head {
  position: relative;
  max-width: 780px; margin: 0 auto 48px;
  text-align: center;
}
.article__crumbs {
  display: inline-flex; align-items: center; gap: 8px;
  font-size: 13px; color: var(--arai-fg-faint);
  margin-bottom: 20px;
}
.article__crumbs a { color: var(--arai-fg-faint); }
.article__crumbs a:hover { color: var(--arai-blue-bright); }
.article__crumbs span { color: var(--arai-fg-dim); }

.article__cat {
  display: inline-block;
  font-size: 11px; font-weight: 700; letter-spacing: 0.16em; text-transform: uppercase;
  color: var(--arai-blue-bright);
  padding: 6px 12px;
  background: rgba(77,168,255,.10);
  border: 1px solid rgba(77,168,255,.28);
  border-radius: var(--r-pill);
  margin-bottom: 22px;
}
.article__title {
  font-size: clamp(28px, 4.2vw, 48px); line-height: 1.1;
  font-weight: 800; letter-spacing: -0.022em;
  color: var(--arai-fg); margin: 0 0 18px;
  text-wrap: balance;
}
.article__lead {
  font-size: clamp(16px, 1.5vw, 18px); line-height: 1.6;
  color: var(--arai-fg-muted); margin: 0;
}
.article__meta {
  margin-top: 24px;
  display: inline-flex; gap: 18px; align-items: center;
  font-size: 13px; color: var(--arai-fg-faint);
  font-family: "JetBrains Mono", monospace;
}
.article__meta span:not(:last-child)::after {
  content: "·"; margin-left: 18px; color: var(--arai-fg-dim);
}

.article__cover {
  position: relative;
  max-width: 980px; margin: 0 auto 56px;
  aspect-ratio: 21 / 9;
  border-radius: var(--r-xl);
  overflow: hidden;
  background: linear-gradient(135deg, var(--cover-from, #0E1730), var(--cover-to, #1E63CC));
  border: 1px solid var(--arai-bg-line-2);
}
.article__cover[data-art]::after { display: none; }
.article__cover[data-art] .article__cover-glyph { display: none; }
.article__cover[data-art] > svg { position: absolute; inset: 0; }
.article__cover::after {
  content: "";
  position: absolute; inset: 0;
  background:
    radial-gradient(circle at 80% 30%, rgba(255,255,255,.18), transparent 50%),
    radial-gradient(circle at 10% 80%, rgba(255,255,255,.10), transparent 50%);
}
.article__cover-glyph {
  position: absolute; right: -20px; bottom: -60px;
  font-family: "JetBrains Mono", monospace;
  font-size: clamp(160px, 28vw, 320px); font-weight: 700; line-height: 1;
  color: rgba(255,255,255,.08);
  letter-spacing: -0.05em;
}

.article__body {
  max-width: 720px; margin: 0 auto;
  font-size: 17px; line-height: 1.75;
  color: var(--arai-fg-muted);
}
.article__body > * + * { margin-top: 1.2em; }
.article__body h2 {
  font-size: 26px; line-height: 1.25; font-weight: 700;
  color: var(--arai-fg); margin-top: 2.2em; margin-bottom: .6em;
  letter-spacing: -0.015em;
}
.article__body h3 {
  font-size: 19px; font-weight: 700;
  color: var(--arai-fg); margin-top: 1.8em; margin-bottom: .4em;
}
.article__body p { margin: 0 0 1em; color: var(--arai-fg-muted); }
.article__body strong { color: var(--arai-fg); font-weight: 600; }
.article__body a { color: var(--arai-blue-bright); text-decoration: underline; text-underline-offset: 3px; }
.article__body a:hover { color: #fff; }

.article__body ul, .article__body ol {
  padding-left: 0; margin: 1em 0;
  list-style: none;
}
.article__body ul li, .article__body ol li {
  position: relative; padding-left: 28px; margin: .6em 0;
}
.article__body ul li::before {
  content: ""; position: absolute; left: 6px; top: .65em;
  width: 7px; height: 7px; border-radius: 50%;
  background: var(--arai-blue);
}
.article__body ol { counter-reset: list; }
.article__body ol li { counter-increment: list; }
.article__body ol li::before {
  content: counter(list, decimal-leading-zero);
  position: absolute; left: 0; top: 2px;
  font-family: "JetBrains Mono", monospace;
  font-size: 13px; font-weight: 600;
  color: var(--arai-blue-bright);
}

.callout {
  margin: 1.6em 0;
  padding: 22px 26px;
  background: rgba(77,168,255,.06);
  border: 1px solid rgba(77,168,255,.22);
  border-left: 3px solid var(--arai-blue);
  border-radius: var(--r-md);
}
.callout__label {
  display: block;
  font-size: 11px; font-weight: 700; letter-spacing: 0.16em; text-transform: uppercase;
  color: var(--arai-blue-bright);
  margin-bottom: 10px;
}
.callout p { margin: 0 0 .8em; color: var(--arai-fg); font-size: 15.5px; line-height: 1.6; }
.callout p:last-child { margin-bottom: 0; }

blockquote {
  margin: 1.6em 0;
  padding: 20px 26px;
  border-left: 3px solid var(--arai-gold);
  background: rgba(212,175,106,.06);
  border-radius: var(--r-md);
  font-size: 17px; line-height: 1.6;
  color: var(--arai-fg);
  font-style: italic;
}

/* ---- Article CTA ---- */
.article-cta {
  max-width: 780px; margin: 64px auto 0;
  padding: 36px;
  background: linear-gradient(180deg, var(--arai-bg-card), var(--arai-bg-muted));
  border: 1px solid var(--arai-bg-line-2);
  border-radius: var(--r-xl);
  text-align: center;
}
.article-cta h3 {
  font-size: 22px; margin-bottom: 10px; color: var(--arai-fg);
}
.article-cta p {
  font-size: 15px; line-height: 1.55; color: var(--arai-fg-muted);
  margin: 0 0 22px; max-width: 480px; margin-inline: auto;
}
.article-cta__btns { display: inline-flex; gap: 12px; flex-wrap: wrap; justify-content: center; }

/* ---- Related posts ---- */
.related {
  padding: 0 0 clamp(72px, 9vw, 120px);
}
.related__head {
  text-align: center; margin-bottom: 32px;
}
.related__head h2 {
  font-size: 24px; font-weight: 700; color: var(--arai-fg);
  margin: 0;
}
.related__grid {
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px;
  max-width: 1080px; margin: 0 auto;
}
@media (max-width: 800px) { .related__grid { grid-template-columns: 1fr; } }