.wrap { width: min(1100px, calc(100% - 2.5rem)); margin-inline: auto; }
.rail { border-block-end: 1px solid var(--line); background: var(--panel); }
.rail-inner { min-block-size: 64px; display: flex; align-items: center; justify-content: space-between; gap: .8rem; position: relative; }
.wordmark { display: flex; align-items: center; gap: .6rem; border-inline-start: 4px solid var(--accent); padding-inline-start: .6rem; font-weight: 750; text-decoration: none; }
.wordmark img { border-radius: 7px; }
.navigation summary { cursor: pointer; padding: .65rem; }
.nav-panel { position: absolute; z-index: 4; inset-inline-end: 0; top: calc(100% - 3px); background: var(--panel); padding: 1rem; border: 1px solid var(--line); border-radius: 8px; display: grid; gap: .7rem; min-inline-size: min(260px, 100%); }
.nav-panel label { display: grid; gap: .2rem; }
.home { padding-block: clamp(2.15rem, 8vh, 5.4rem) 3rem; }
.home h1 { max-inline-size: 17ch; }
.home .lead { font-size: clamp(1rem, 2vw, 1.25rem); max-inline-size: 54ch; margin-block-end: 1.6rem; }
.inside { padding-block: 3rem; }
.inside article { max-inline-size: 76ch; }
.inside h1 { font-size: clamp(2.05rem, 5vw, 4.25rem); }
.guide-index { margin-block-start: 3rem; }
.guide-index ul { list-style: none; padding: 0; display: grid; gap: .5rem; grid-template-columns: repeat(auto-fit, minmax(min(235px, 100%),1fr)); }
.guide-index li, .key-facts { background: var(--panel); border: 1px solid var(--line); border-radius: 8px; padding: .85rem; }
.key-facts { padding-inline-start: 2.2rem; }
.guide section { margin-block: 2rem; }
.guide details { border-block-end: 1px solid var(--line); padding: .7rem; }
.sources { margin-block: 1.2rem; }
.colophon { border-block-start: 4px solid var(--accent); background: var(--panel); padding-block: 2.15rem; }
.colophon nav { border-block-start: 1px solid var(--line); display: flex; gap: .55rem 1rem; flex-wrap: wrap; padding-block: .75rem; font-size: .86rem; }
.devices { list-style: none; padding: 0; display: grid; grid-template-columns: repeat(auto-fit,minmax(148px,1fr)); gap: .65rem; }
.devices li { display: grid; border: 1px solid var(--line); padding: .6rem; border-radius: 6px; font-size: .9rem; }
.devices li span { color: var(--muted); }
@media (max-width: 480px) {
  .wrap { width: calc(100% - 1.4rem); }
  .home .lead { margin-block-end: .9rem; }
  .ruler-controls { padding: .6rem; }
  .ruler-controls button { font-size: .87rem; }
}