/* ============================================================
   YMT — Insights index + article template
   ============================================================ */

/* ---------- Index grid ---------- */
.post-grid {
  display: grid;
  gap: clamp(0.9rem, 1.8vw, 1.4rem);
  grid-template-columns: repeat(auto-fill, minmax(min(100%, 320px), 1fr));
}
.post-card {
  padding: clamp(1.5rem, 2.6vw, 2.2rem);
  display: grid;
  gap: 0.7rem;
  align-content: start;
  min-height: 260px;
  transition: transform 0.6s cubic-bezier(0.16, 1, 0.3, 1), border-color 0.4s, background 0.4s;
}
.post-card:hover { transform: translateY(-6px); border-color: var(--glass-line-hi); background: var(--glass-bg-hi); }
.post-card[hidden] { display: none; }
.post-cat {
  font-family: var(--font-mono);
  font-size: 0.68rem; letter-spacing: 0.2em; text-transform: uppercase;
  color: var(--accent-b);
}
.post-card[data-theme-chip="marketing"] { --accent-b: var(--magenta); }
.post-card[data-theme-chip="live"]      { --accent-b: var(--sky); }
.post-card[data-theme-chip="ai"]        { --accent-b: var(--emerald); }
.post-title {
  font-family: var(--font-display); font-weight: 600;
  font-size: clamp(1.2rem, 1rem + 0.6vw, 1.5rem);
  line-height: 1.2; letter-spacing: -0.028em;
}
.post-desc { color: var(--mist); font-size: 0.94rem; }
.post-meta {
  margin-top: auto; padding-top: 0.9rem;
  display: flex; gap: 0.6rem; align-items: center;
  font-family: var(--font-mono); font-size: 0.7rem;
  letter-spacing: 0.12em; color: var(--whisper);
}
.filter { cursor: pointer; }
.filter.is-on { border-color: var(--accent-a); color: var(--paper); background: var(--glass-bg-hi); }

/* ---------- Article header ---------- */
.art-head {
  padding-top: clamp(7rem, 15vh, 10rem);
  padding-bottom: clamp(2rem, 4vh, 3rem);
  display: grid; gap: 1rem;
  max-width: 900px;
}
.crumbs {
  display: flex; flex-wrap: wrap; gap: 0.5rem; align-items: center;
  font-family: var(--font-mono); font-size: 0.7rem;
  letter-spacing: 0.14em; text-transform: uppercase; color: var(--whisper);
  margin-bottom: 0.5rem;
}
.crumbs a:hover { color: var(--paper); }
.art-meta {
  display: flex; flex-wrap: wrap; gap: 0.5rem 1.5rem;
  margin-top: 1rem; padding-top: 1.25rem;
  border-top: 1px solid var(--glass-line);
  font-size: 0.85rem; color: var(--whisper);
}
.art-meta strong { color: var(--mist); font-weight: 600; }

/* ---------- Key takeaways (the AIO answer block) ---------- */
.takeaways {
  padding: clamp(1.4rem, 2.6vw, 2rem);
  max-width: 900px;
  border-color: var(--accent-a);
  box-shadow: 0 26px 70px -30px var(--accent-glow), var(--glass-shadow);
}
.takeaways-title {
  font-family: var(--font-mono);
  font-size: 0.7rem; letter-spacing: 0.24em; text-transform: uppercase;
  color: var(--accent-b); font-weight: 500; margin-bottom: 1rem;
}
.takeaways ul { display: grid; gap: 0.75rem; }
.takeaways li {
  position: relative; padding-left: 1.6rem;
  color: var(--mist); font-size: 1rem; line-height: 1.55;
}
.takeaways li::before {
  content: ""; position: absolute; left: 0; top: 0.62em;
  width: 8px; height: 8px; border-radius: 2px;
  background: linear-gradient(120deg, var(--accent-a), var(--accent-b));
}

/* ---------- Layout: sticky TOC + prose ---------- */
.art-layout {
  display: grid;
  grid-template-columns: minmax(0, 220px) minmax(0, 1fr);
  gap: clamp(2rem, 5vw, 4.5rem);
  align-items: start;
  padding-block: clamp(2.5rem, 6vh, 4.5rem);
}
@media (max-width: 900px) {
  .art-layout { grid-template-columns: 1fr; gap: 2rem; }
  .art-toc { position: static !important; }
}
.art-toc { position: sticky; top: 110px; }
.toc-title {
  font-family: var(--font-mono);
  font-size: 0.66rem; letter-spacing: 0.22em; text-transform: uppercase;
  color: var(--whisper); margin-bottom: 0.9rem;
}
.art-toc ul { display: grid; gap: 0.1rem; border-left: 1px solid var(--glass-line); }
.art-toc a {
  display: block; padding: 0.42rem 0 0.42rem 0.9rem;
  margin-left: -1px; border-left: 1px solid transparent;
  font-size: 0.87rem; color: var(--whisper); line-height: 1.4;
  transition: color 0.3s, border-color 0.3s;
}
.art-toc a:hover { color: var(--mist); }
.art-toc a.is-here { color: var(--paper); border-left-color: var(--accent-a); }

/* ---------- Prose ---------- */
.art-body { max-width: 72ch; font-size: 1.06rem; line-height: 1.75; }
.art-body > * + * { margin-top: 1.2em; }
.art-body p { color: rgba(244, 246, 251, 0.82); }
.art-body h2 {
  font-family: var(--font-display); font-weight: 600;
  font-size: clamp(1.5rem, 1.2rem + 1vw, 2rem);
  line-height: 1.2; letter-spacing: -0.03em;
  margin-top: 2.6em; scroll-margin-top: 110px;
}
.art-body h3 {
  font-family: var(--font-display); font-weight: 600;
  font-size: 1.2rem; letter-spacing: -0.02em;
  margin-top: 2em; scroll-margin-top: 110px;
}
.art-body h4 { font-family: var(--font-display); font-weight: 600; font-size: 1.02rem; margin-top: 1.8em; }
.art-body h2 + p, .art-body h3 + p { margin-top: 0.7em; }
.anchor {
  float: left; margin-left: -1.1em; padding-right: 0.35em;
  color: var(--accent-a); opacity: 0; font-weight: 400;
  transition: opacity 0.25s;
}
.art-body h2:hover .anchor, .art-body h3:hover .anchor { opacity: 0.8; }
@media (max-width: 700px) { .anchor { display: none; } }

.art-body a { color: var(--paper); text-decoration: underline; text-decoration-color: var(--accent-a); text-underline-offset: 4px; text-decoration-thickness: 1.5px; }
.art-body a:hover { color: var(--accent-b); }
.art-body strong { color: var(--paper); font-weight: 600; }
.art-body ul, .art-body ol { display: grid; gap: 0.6rem; padding-left: 1.35rem; color: rgba(244,246,251,0.82); }
.art-body ul { list-style: none; padding-left: 0; }
.art-body ul > li { position: relative; padding-left: 1.5rem; }
.art-body ul > li::before {
  content: ""; position: absolute; left: 0.2rem; top: 0.72em;
  width: 6px; height: 6px; border-radius: 50%; background: var(--accent-a); opacity: 0.75;
}
.art-body ol { list-style: decimal; }
.art-body ol > li::marker { color: var(--accent-b); font-family: var(--font-mono); font-size: 0.85em; }
.art-body img { border-radius: var(--r-md); border: 1px solid var(--glass-line); margin-block: 1.8em; }
.art-body code {
  font-family: var(--font-mono); font-size: 0.86em;
  padding: 0.15em 0.42em; border-radius: 6px;
  background: rgba(255,255,255,0.07); border: 1px solid var(--glass-line);
}
.md-pre {
  padding: 1.2rem 1.4rem; border-radius: var(--r-md);
  background: rgba(4,6,13,0.72); border: 1px solid var(--glass-line);
  overflow-x: auto; font-size: 0.86rem; line-height: 1.6;
}
.md-pre code { background: none; border: 0; padding: 0; }
.md-quote {
  margin: 2em 0; padding: 1.2rem 1.6rem;
  border-left: 2px solid var(--accent-a);
  background: rgba(255,255,255,0.032);
  border-radius: 0 var(--r-md) var(--r-md) 0;
  font-family: var(--font-display); font-size: 1.12rem;
  line-height: 1.5; letter-spacing: -0.02em; color: var(--paper);
}
.md-table-wrap {
  overflow-x: auto; margin-block: 2em;
  border: 1px solid var(--glass-line); border-radius: var(--r-md);
}
.md-table-wrap .spec th[scope="col"] { width: auto; color: var(--accent-b); }
.art-body hr { margin-block: 3em; }

/* ---------- FAQ ---------- */
.faq { display: grid; gap: 0.7rem; max-width: 900px; }
.faq-item { padding: 0; }
.faq-item summary {
  list-style: none; cursor: pointer;
  padding: 1.15rem clamp(1.1rem, 2.2vw, 1.6rem);
  display: flex; align-items: center; justify-content: space-between; gap: 1rem;
  font-family: var(--font-display); font-weight: 600; font-size: 1.02rem;
  letter-spacing: -0.015em;
}
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary i {
  flex: none; width: 16px; height: 16px; position: relative;
  transition: transform 0.4s cubic-bezier(0.16, 1, 0.3, 1);
}
.faq-item summary i::before, .faq-item summary i::after {
  content: ""; position: absolute; inset: 0; margin: auto;
  background: var(--accent-a); border-radius: 2px;
}
.faq-item summary i::before { width: 16px; height: 2px; }
.faq-item summary i::after  { width: 2px; height: 16px; transition: opacity 0.3s; }
.faq-item[open] summary i { transform: rotate(90deg); }
.faq-item[open] summary i::after { opacity: 0; }
.faq-a {
  padding: 0 clamp(1.1rem, 2.2vw, 1.6rem) 1.4rem;
  color: var(--mist); max-width: 68ch;
}

/* ---------- Author + related ---------- */
.author-card {
  padding: clamp(1.4rem, 2.6vw, 2rem);
  display: flex; flex-wrap: wrap; gap: 1.5rem;
  align-items: center; justify-content: space-between;
}
.author-card .small { max-width: 56ch; margin-top: 0.5rem; }
.rel-card { padding: clamp(1.4rem, 2.4vw, 2rem); display: grid; gap: 0.45rem; }