/* Sub-page styles — extends the main /style.css */
.sub-hero {
  padding: 9rem 0 4rem;
  position: relative;
  overflow: hidden;
  isolation: isolate;
}
.sub-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1;
  background:
    radial-gradient(800px 360px at 80% 0%, rgba(91,227,107,.10), transparent 60%),
    radial-gradient(700px 400px at 0% 80%, rgba(182,255,74,.06), transparent 60%);
}

.sub-back {
  display: inline-flex;
  align-items: center;
  gap: .4rem;
  font-family: var(--f-mono);
  font-size: .82rem;
  color: var(--c-muted);
  margin-bottom: 2rem;
  transition: color .2s ease;
}
.sub-back:hover { color: var(--c-accent); }

.sub-cat {
  display: inline-block;
  font-family: var(--f-mono);
  font-size: .78rem;
  color: var(--c-accent);
  letter-spacing: .08em;
  text-transform: uppercase;
  padding: .35rem .8rem;
  border: 1px solid color-mix(in srgb, var(--c-accent) 30%, transparent);
  background: rgba(182,255,74,.06);
  border-radius: 999px;
  margin-bottom: 1.4rem;
}

.sub-title {
  font-size: clamp(2.4rem, 5.4vw, 4.4rem);
  font-weight: 800;
  letter-spacing: -.03em;
  line-height: 1.05;
  margin-bottom: 1rem;
}
.sub-tag {
  color: var(--c-muted);
  font-size: 1.15rem;
  max-width: 60ch;
  margin-bottom: 2rem;
}

.sub-cta { display: flex; gap: .8rem; flex-wrap: wrap; }

.sub-section {
  padding: 4rem 0;
  border-top: 1px solid var(--c-line);
}
.sub-section h2 {
  font-size: 1.6rem;
  margin-bottom: 1.2rem;
  letter-spacing: -.01em;
}
.sub-section h3 {
  font-size: 1.1rem;
  margin: 1.5rem 0 .6rem;
  color: var(--c-text);
}
.sub-prose p {
  color: var(--c-muted);
  font-size: 1.05rem;
  margin-bottom: 1rem;
  max-width: 70ch;
}
.sub-prose ul {
  margin-bottom: 1rem;
}
.sub-prose ul li {
  position: relative;
  padding-left: 1.4rem;
  color: var(--c-muted);
  font-size: 1rem;
  margin-bottom: .45rem;
}
.sub-prose ul li::before {
  content: "›";
  position: absolute; left: 0;
  color: var(--c-accent);
  font-weight: 700;
}
.sub-prose strong { color: var(--c-text); font-weight: 600; }

.sub-grid-2 {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2.4rem;
}
@media (max-width: 760px){ .sub-grid-2 { grid-template-columns: 1fr; } }

.code-block {
  background: var(--c-bg-2);
  border: 1px solid var(--c-line);
  border-radius: var(--radius);
  padding: 1.2rem 1.4rem;
  font-family: var(--f-mono);
  font-size: .88rem;
  color: var(--c-text);
  overflow-x: auto;
  line-height: 1.55;
  position: relative;
}
.code-block::before {
  content: attr(data-lang);
  position: absolute;
  top: .6rem; right: .9rem;
  font-size: .7rem;
  color: var(--c-dim);
  letter-spacing: .06em;
  text-transform: uppercase;
}
.code-block .c-k { color: #c5a5ff; }
.code-block .c-s { color: #b6ff4a; }
.code-block .c-c { color: #5b6e6e; font-style: italic; }
.code-block .c-f { color: #79c0ff; }

.related {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: .8rem;
  margin-top: 1.2rem;
}
.related a {
  padding: 1rem 1.1rem;
  border: 1px solid var(--c-line);
  border-radius: var(--radius);
  background: linear-gradient(180deg, var(--c-surface) 0%, var(--c-bg) 100%);
  transition: all .25s ease;
  display: flex; align-items: center; justify-content: space-between;
  font-weight: 600;
  font-size: .94rem;
}
.related a:hover {
  border-color: var(--c-accent);
  color: var(--c-accent);
  transform: translateY(-2px);
  box-shadow: 0 0 22px -8px var(--c-accent-glow);
}
.related a span { color: var(--c-dim); transition: color .25s ease; }
.related a:hover span { color: var(--c-accent); }

.sub-cta-card {
  margin-top: 4rem;
  padding: 2.4rem;
  border: 1px solid var(--c-line);
  border-radius: var(--radius-lg);
  background: linear-gradient(180deg, var(--c-surface) 0%, var(--c-bg) 100%);
  text-align: center;
}
.sub-cta-card h3 {
  font-size: 1.4rem;
  margin-bottom: .6rem;
}
.sub-cta-card p { color: var(--c-muted); margin-bottom: 1.4rem; }