.layout {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 clamp(1rem, 3vw, 1.5rem) clamp(2.5rem, 5vw, 4rem);
  display: block;
  width: 100%;
}

@media (min-width: 900px) {
  .layout {
    display: grid;
    grid-template-columns: min(220px, 28vw) minmax(0, 1fr);
    gap: clamp(1.5rem, 3vw, 2.75rem);
    align-items: start;
  }
}

.side-nav {
  display: none;
}

@media (min-width: 900px) {
  .side-nav {
    display: block;
    position: sticky;
    top: 1rem;
    align-self: start;
    padding: 1rem 0;
    border: 2px solid rgba(255, 255, 255, 0.85);
    border-radius: 6px;
    background: rgba(8, 16, 36, 0.35);
    box-shadow: inset 0 0 0 1px rgba(255, 255, 255, 0.15);
  }

  .side-nav h2 {
    margin: 0 0 0.75rem;
    padding: 0 1rem;
    font-size: 0.65rem;
    letter-spacing: 0.18em;
    text-transform: uppercase;
    color: rgba(255, 255, 255, 0.55);
  }

  .side-nav ul {
    list-style: none;
    margin: 0;
    padding: 0;
  }

  .side-nav a {
    display: block;
    padding: 0.4rem 1rem;
    font-size: 0.78rem;
    line-height: 1.35;
    color: rgba(255, 255, 255, 0.78);
    text-decoration: none;
    letter-spacing: 0.04em;
    border-left: 3px solid transparent;
  }

  .side-nav a:hover {
    color: var(--white);
    background: rgba(255, 255, 255, 0.06);
    border-left-color: rgba(255, 255, 255, 0.35);
  }
}

.mobile-section-jump {
  padding: 0.75rem 1rem;
  border: 1px solid rgba(255, 255, 255, 0.35);
  border-radius: 6px;
  background: rgba(8, 16, 36, 0.35);
}

@media (min-width: 900px) {
  .mobile-section-jump {
    display: none;
  }
}

.mobile-section-jump label {
  display: block;
  font-size: 0.65rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: rgba(255, 255, 255, 0.55);
  margin-bottom: 0.35rem;
}

.mobile-section-jump select {
  width: 100%;
  font-family: inherit;
  font-size: 0.9rem;
  padding: 0.45rem;
  border-radius: 4px;
  border: 1px solid rgba(255, 255, 255, 0.4);
  background: rgba(10, 20, 48, 0.9);
  color: var(--white);
}

.content {
  min-width: 0;
}

.prose {
  max-width: 44rem;
}