/* =========================================================
   Arx — platform, blog, post pages
   ========================================================= */

/* ======= SHARED PAGE HERO ======= */
.page-hero {
  padding: clamp(64px, 8vw, 120px) 0 clamp(48px, 6vw, 80px);
  border-bottom: 1px solid var(--rule);
}
.page-hero .eyebrow { margin-bottom: 28px; }
.page-hero h1 {
  font-family: var(--font-display);
  font-weight: 360;
  font-size: clamp(2.5rem, 6vw, 5rem);
  line-height: 0.98;
  letter-spacing: -0.035em;
  max-width: 18ch;
}
.page-hero h1 em { font-style: italic; color: var(--ink-2); font-weight: 340; }
.page-hero .lede {
  margin-top: 32px;
  max-width: 60ch;
  font-size: 18px; color: var(--ink-2); line-height: 1.55;
}

/* ======= PLATFORM PAGE ======= */
.plat-overview {
  padding: clamp(72px, 9vw, 120px) 0;
}
.plat-overview .grid {
  display: grid;
  grid-template-columns: 280px 1fr;
  gap: 64px;
  align-items: start;
}
.plat-side {
  position: sticky; top: 120px;
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--ink-2);
}
.plat-side .k {
  display: flex; justify-content: space-between;
  padding: 10px 0;
  border-bottom: 1px solid var(--rule);
}
.plat-side .k:first-child { border-top: 1px solid var(--rule); }
.plat-side .k .key { color: var(--ink-3); letter-spacing: 0.08em; text-transform: uppercase; font-size: 10.5px; }

.plat-section {
  padding-bottom: 72px;
  margin-bottom: 72px;
  border-bottom: 1px solid var(--rule);
}
.plat-section:last-child { border-bottom: 0; margin-bottom: 0; }
.plat-section .tag-id {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--ink-3);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  margin-bottom: 12px;
}
.plat-section h2 {
  font-family: var(--font-display);
  font-weight: 400;
  font-size: clamp(1.75rem, 3.5vw, 2.5rem);
  line-height: 1.05;
  letter-spacing: -0.025em;
  margin-bottom: 18px;
  max-width: 22ch;
}
.plat-section > p {
  color: var(--ink-2); font-size: 16px; line-height: 1.6; max-width: 62ch;
  margin-bottom: 24px;
}
.plat-cols { display: grid; grid-template-columns: 1fr 1fr; gap: 32px; margin-top: 32px; }
.plat-cols > div h4 {
  font-family: var(--font-display);
  font-weight: 440;
  font-size: 18px;
  letter-spacing: -0.015em;
  margin-bottom: 8px;
}
.plat-cols > div p { font-size: 14px; color: var(--ink-2); line-height: 1.55; }

.plat-figure {
  background: var(--paper-2);
  border: 1px solid var(--rule);
  padding: 28px;
  margin: 24px 0;
  border-radius: 2px;
}
.plat-figure .caption {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--ink-3);
  margin-bottom: 18px;
}

.plat-code {
  background: var(--mono-bg);
  color: var(--mono-ink);
  font-family: var(--font-mono);
  font-size: 12.5px;
  line-height: 1.6;
  padding: 18px 20px;
  border-radius: 2px;
  overflow-x: auto;
  margin: 20px 0;
}
.plat-code .dim { color: var(--mono-dim); }
.plat-code .g { color: var(--mono-green); }
.plat-code .a { color: var(--mono-amber); }

.connector-grid {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: 1px;
  background: var(--rule);
  border: 1px solid var(--rule);
  margin-top: 20px;
}
.connector-grid span {
  background: var(--paper);
  padding: 14px 10px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.04em;
  text-align: center;
  color: var(--ink-2);
}
.connector-grid .more { background: var(--paper-2); color: var(--ink-3); }

@media (max-width: 900px){
  .plat-overview .grid { grid-template-columns: 1fr; }
  .plat-side { position: static; }
  .plat-cols { grid-template-columns: 1fr; }
  .connector-grid { grid-template-columns: repeat(3, 1fr); }
}

/* ======= BLOG INDEX ======= */
.blog-filters {
  display: flex; gap: 24px; align-items: center;
  padding: 20px 0;
  border-bottom: 1px solid var(--rule);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--ink-3);
  flex-wrap: wrap;
}
.blog-filters .label { color: var(--ink-3); }
.blog-filters a {
  color: var(--ink-3);
  padding: 4px 0;
  border-bottom: 1px solid transparent;
}
.blog-filters a.active { color: var(--ink); border-bottom-color: var(--ink); }
.blog-filters a:hover { color: var(--ink-2); }

.feature-post {
  padding: 56px 0 72px;
  border-bottom: 1px solid var(--rule);
}
.feature-post .grid {
  display: grid;
  grid-template-columns: 1.1fr 1fr;
  gap: 64px;
  align-items: center;
}
.feature-post .copy .kicker {
  font-family: var(--font-mono);
  font-size: 11px; letter-spacing: 0.08em; text-transform: uppercase;
  color: var(--ink-3); margin-bottom: 16px;
  display: flex; gap: 12px; align-items: center;
}
.feature-post .copy .kicker .cat { color: var(--signal); }
.feature-post h2 {
  font-family: var(--font-display);
  font-weight: 380;
  font-size: clamp(2rem, 4.5vw, 3.5rem);
  line-height: 1.02;
  letter-spacing: -0.03em;
  max-width: 18ch;
}
.feature-post h2 a { color: inherit; }
.feature-post .dek {
  margin-top: 20px; color: var(--ink-2); font-size: 17px; line-height: 1.55; max-width: 52ch;
}
.feature-post .meta {
  margin-top: 28px; font-family: var(--font-mono); font-size: 11px; letter-spacing: 0.04em; color: var(--ink-3);
  text-transform: uppercase;
}
.feature-illus {
  background: var(--paper-2);
  border: 1px solid var(--rule);
  aspect-ratio: 4/3;
  padding: 28px;
  display: grid; place-items: center;
  border-radius: 2px;
  position: relative;
}

.post-list { padding: 40px 0 80px; }
.post-row {
  display: grid;
  grid-template-columns: 100px 120px 1fr auto;
  gap: 24px;
  padding: 26px 0;
  border-bottom: 1px solid var(--rule);
  align-items: baseline;
}
.post-row:hover { background: #FBF9F3; }
.post-row .num {
  font-family: var(--font-mono);
  font-size: 11px; color: var(--ink-3); letter-spacing: 0.08em;
}
.post-row .cat {
  font-family: var(--font-mono);
  font-size: 11px; color: var(--signal); letter-spacing: 0.08em; text-transform: uppercase;
}
.post-row .title h3 {
  font-family: var(--font-display);
  font-weight: 420;
  font-size: 22px;
  line-height: 1.2;
  letter-spacing: -0.015em;
  margin-bottom: 6px;
  max-width: 32ch;
}
.post-row .title h3 a { color: var(--ink); }
.post-row .title .dek { color: var(--ink-3); font-size: 14px; max-width: 60ch; }
.post-row .right {
  font-family: var(--font-mono);
  font-size: 11px; color: var(--ink-3);
  letter-spacing: 0.06em;
  text-align: right;
  white-space: nowrap;
}

@media (max-width: 900px){
  .feature-post .grid { grid-template-columns: 1fr; gap: 32px; }
  .post-row { grid-template-columns: 60px 1fr; }
  .post-row .cat { grid-column: 2; }
  .post-row .right { grid-column: 1 / -1; text-align: left; margin-top: 6px; }
}

/* ======= POST ======= */
.post-hero {
  padding: clamp(56px, 8vw, 110px) 0 clamp(40px, 5vw, 64px);
  border-bottom: 1px solid var(--rule);
}
.post-hero .back {
  font-family: var(--font-mono);
  font-size: 12px; letter-spacing: 0.04em;
  color: var(--ink-3);
  text-transform: uppercase;
  margin-bottom: 32px;
  display: inline-flex; align-items: center; gap: 6px;
}
.post-hero .back:hover { color: var(--ink); }
.post-hero .kicker {
  font-family: var(--font-mono);
  font-size: 11px; letter-spacing: 0.08em; text-transform: uppercase;
  color: var(--signal); margin-bottom: 18px;
}
.post-hero h1 {
  font-family: var(--font-display);
  font-weight: 360;
  font-size: clamp(2.25rem, 5.5vw, 4.5rem);
  line-height: 1.0;
  letter-spacing: -0.035em;
  max-width: 22ch;
}
.post-hero .dek {
  margin-top: 24px;
  max-width: 58ch;
  font-size: 19px;
  line-height: 1.55;
  color: var(--ink-2);
}
.post-hero .byline {
  margin-top: 40px;
  display: flex; align-items: center; gap: 16px;
  font-family: var(--font-mono);
  font-size: 12px; color: var(--ink-3); letter-spacing: 0.04em;
  text-transform: uppercase;
}
.post-hero .byline .portrait {
  width: 36px; height: 36px; border-radius: 50%;
  background: var(--accent);
  color: var(--accent-ink);
  display: grid; place-items: center;
  font-family: var(--font-display);
  font-weight: 420;
  font-size: 14px;
}
.post-hero .byline span { color: var(--ink-2); }
.post-hero .byline strong { color: var(--ink); font-weight: 500; }

.article {
  padding: clamp(48px, 6vw, 80px) 0 clamp(72px, 9vw, 120px);
}
.article .container-read {
  width: 100%;
  max-width: 680px;
  margin: 0 auto;
  padding: 0 32px;
  font-family: var(--font-sans);
  font-size: 17px;
  line-height: 1.7;
  color: var(--ink-2);
}
.article pre, .article pre.code {
  white-space: pre;
}
.article h2 {
  font-family: var(--font-display);
  font-weight: 440;
  font-size: clamp(1.5rem, 2.6vw, 1.9rem);
  line-height: 1.15;
  letter-spacing: -0.02em;
  color: var(--ink);
  margin: 56px 0 16px;
}
.article h3 {
  font-family: var(--font-display);
  font-weight: 460;
  font-size: 1.25rem;
  line-height: 1.2;
  letter-spacing: -0.015em;
  color: var(--ink);
  margin: 36px 0 12px;
}
.article p { margin: 0 0 20px; }
.article p + p { margin-top: 0; }
.article ul { margin: 0 0 24px; padding-left: 1.2em; }
.article li { margin-bottom: 10px; }
.article li::marker { color: var(--ink-3); }
.article strong { color: var(--ink); font-weight: 600; }
.article em { color: inherit; }
.article a { color: var(--ink); border-bottom: 1px solid var(--rule-2); }
.article a:hover { border-bottom-color: var(--ink); }

.article blockquote {
  margin: 40px 0;
  padding: 0;
  border-left: 2px solid var(--signal);
  padding-left: 28px;
  font-family: var(--font-display);
  font-style: italic;
  font-weight: 380;
  font-size: 1.5rem;
  line-height: 1.3;
  color: var(--ink);
  letter-spacing: -0.015em;
}
.article .note {
  margin: 32px 0;
  padding: 20px 24px;
  background: var(--paper-2);
  border-left: 3px solid var(--ink);
  font-size: 15px;
  color: var(--ink-2);
}
.article pre.code, .article pre {
  background: var(--mono-bg);
  color: var(--mono-ink);
  font-family: var(--font-mono);
  font-size: 13px;
  line-height: 1.65;
  padding: 18px 22px;
  border-radius: 2px;
  overflow-x: auto;
  margin: 24px 0;
}
.article code.inline {
  font-family: var(--font-mono);
  font-size: 0.9em;
  background: var(--paper-2);
  color: var(--ink);
  padding: 2px 6px;
  border-radius: 2px;
  border: 1px solid var(--rule);
}
.article pre .dim { color: var(--mono-dim); }
.article pre .g { color: var(--mono-green); }

.post-footer {
  border-top: 1px solid var(--rule);
  padding: 40px 0 80px;
  margin-top: 40px;
}
.post-footer .container-read {
  display: flex; justify-content: space-between; align-items: center;
  font-family: var(--font-mono); font-size: 12px; letter-spacing: 0.04em;
  color: var(--ink-3); text-transform: uppercase;
}
.post-footer a { color: var(--ink); border-bottom: 1px solid var(--ink); padding-bottom: 2px; }

.related {
  padding: 56px 0 0;
  border-top: 1px solid var(--rule);
}
.related h3 {
  font-family: var(--font-mono);
  font-size: 11px; letter-spacing: 0.12em; text-transform: uppercase;
  color: var(--ink-3);
  margin-bottom: 24px;
  font-weight: 500;
}
.related-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 32px; }
.related-card {
  border-top: 1px solid var(--rule-2);
  padding-top: 16px;
}
.related-card .cat {
  font-family: var(--font-mono);
  font-size: 11px; letter-spacing: 0.08em; text-transform: uppercase;
  color: var(--signal); margin-bottom: 10px;
}
.related-card h4 {
  font-family: var(--font-display);
  font-weight: 420;
  font-size: 18px;
  line-height: 1.2;
  letter-spacing: -0.015em;
  margin-bottom: 8px;
}
.related-card p { color: var(--ink-3); font-size: 13px; line-height: 1.5; }

@media (max-width: 800px){
  .related-grid { grid-template-columns: 1fr; }
}