/* Layout primitives — container, header, section base and surface variants */

.container {
  width: 100%;
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 1.25rem;
}

@media (min-width: 768px) {
  .container {
    padding: 0 2rem;
  }
}

section {
  padding: clamp(4.5rem, 10vw, 8rem) 0;
}
.section--tight {
  padding-block: clamp(2rem, 5vw, 4rem);
}

/* Light surface: one bright break in the night, so the page has rhythm */
.section--paper {
  background: var(--paper);
  border-radius: var(--radius);
  margin-inline: clamp(0.5rem, 1.5vw, 1.25rem);
}
.section--paper h2,
.section--paper h3 {
  color: var(--paper-ink);
}
.section--paper h2 em {
  color: var(--violet);
}
.section--paper p {
  color: var(--paper-ink-soft);
}
.section--paper .eyebrow {
  color: var(--violet);
}
.section--paper .eyebrow::before {
  background: var(--violet);
  box-shadow: none;
}

.page-header {
  position: sticky;
  top: 0;
  z-index: 10;
  padding: 0.9rem 0;
  background: rgba(14, 7, 24, 0.72);
  backdrop-filter: blur(14px) saturate(140%);
  border-bottom: 1px solid var(--line);
}
.page-header__bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

:target {
  scroll-margin-top: 5rem;
}