/* Shared styles for secondary pages */
.page-hero {
  padding: 80px 0 56px;
  border-bottom: 1px solid var(--border);
  position: relative; overflow: hidden;
}
.page-hero::before {
  content: ""; position: absolute; inset: -20% -10% auto -10%; height: 100%;
  background: radial-gradient(40% 60% at 30% 20%, rgba(34,211,238,0.1), transparent 70%);
  pointer-events: none;
}
.page-hero .container { position: relative; z-index: 1; }
.page-hero h1 { font-size: clamp(40px, 5vw, 64px); max-width: 900px; }
.page-hero p.lead { font-size: 19px; color: var(--foam-300); max-width: 680px; margin-top: 22px; }
.crumb { font-family: var(--f-mono); font-size: 12px; color: var(--foam-500); letter-spacing: .1em; text-transform: uppercase; margin-bottom: 18px; }
.crumb a { color: var(--foam-500); }
.crumb a:hover { color: var(--bio-300); }

.prose { max-width: 720px; margin: 0 auto; }
.prose p { margin: 0 0 18px; font-size: 17px; line-height: 1.7; }
.prose h3 { margin: 48px 0 18px; }
.prose h4 { margin: 32px 0 10px; font-family: var(--f-display); font-size: 22px; }
.prose ul { color: var(--foam-300); padding-left: 20px; }
.prose li { margin: 8px 0; }
.prose code, .mono { font-family: var(--f-mono); font-size: 0.9em; color: var(--bio-200); background: var(--abyss-800); padding: 2px 7px; border-radius: 4px; }

.split { display: grid; grid-template-columns: 280px 1fr; gap: 64px; align-items: start; }
.split .sticky { position: sticky; top: 92px; }
.split .sticky h5 { font-family: var(--f-mono); font-size: 11px; letter-spacing: .14em; text-transform: uppercase; color: var(--foam-500); margin: 0 0 14px; font-weight: 500; }
.split .sticky ul { list-style: none; padding: 0; margin: 0; display: flex; flex-direction: column; gap: 8px; }
.split .sticky a { font-size: 14px; color: var(--foam-400); display: block; padding: 6px 0; border-left: 2px solid var(--border); padding-left: 14px; transition: all .2s; }
.split .sticky a:hover, .split .sticky a.active { color: var(--foam-50); border-left-color: var(--bio-400); }

@media (max-width: 900px) { .split { grid-template-columns: 1fr; } .split .sticky { position: static; } }