.masthead, main, .site-footer { width: 100%; margin-inline: auto; }
.masthead { display: flex; justify-content: space-between; align-items: center; gap: 24px; min-height: 108px; padding: 18px var(--gutter); background: var(--rose); }
.site-mark { display: inline-flex; align-items: center; gap: 16px; min-height: 48px; font-size: 26px; text-decoration: none; }
.notebook-mark { width: 30px; height: 36px; flex-shrink: 0; background: var(--pink); clip-path: polygon(8px 0, 100% 0, 100% calc(100% - 8px), calc(100% - 8px) 100%, 0 100%, 0 8px); border-left: 6px solid var(--ink); }
.guide-label { color: var(--ink); }
.hero { display: grid; grid-template-columns: minmax(0, 1.65fr) minmax(0, .65fr); align-items: center; gap: 64px; padding: 64px var(--gutter); background: var(--hero-ground); }
.hero-copy { max-width: 880px; min-width: 0; }
.hero--home .hero-title { max-width: 16ch; font-size: clamp(60px, 6.2vw, 92px); }
.site-footer { display: flex; justify-content: space-between; align-items: flex-start; gap: 40px; padding: 44px var(--gutter) 144px; background: var(--mist); font-size: 19px; }
.site-footer p { max-width: 58ch; }
.site-footer a { flex-shrink: 0; display: inline-flex; align-items: center; gap: 12px; min-height: 48px; padding-block: 8px; }
.bottom-dock { position: fixed; z-index: 10; bottom: 18px; left: 24px; right: 24px; margin-inline: auto; max-width: 720px; background: var(--pink); clip-path: polygon(14px 0, 100% 0, 100% calc(100% - 14px), calc(100% - 14px) 100%, 0 100%, 0 14px); padding: 10px 14px; }
.bottom-dock nav { display: grid; grid-template-columns: repeat(5, minmax(0, 1fr)); gap: 4px; }
.dock-link { color: var(--ink); min-height: 48px; padding: 10px 8px; display: inline-flex; align-items: center; justify-content: center; font-size: 19px; text-align: center; }
.dock-link.is-active { background: var(--salmon); font-weight: 700; clip-path: polygon(8px 0, 100% 0, 100% calc(100% - 8px), calc(100% - 8px) 100%, 0 100%, 0 8px); }
.dock-link:hover { background: white; }
.dock-link:focus-visible { outline-offset: -4px; }
.reading-progress { position: absolute; appearance: none; -webkit-appearance: none; top: 0; left: 18px; width: calc(100% - 36px); height: 4px; border: 0; background: white; color: var(--ink); }
.reading-progress::-webkit-progress-bar { background: white; }
.reading-progress::-webkit-progress-value { background: var(--ink); }
.reading-progress::-moz-progress-bar { background: var(--ink); }
.missing-page { min-height: 65vh; padding: 64px var(--gutter); background: var(--salmon); display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 300px); gap: 24px 64px; align-content: center; }
.missing-page h1, .missing-page p, .missing-page a { grid-column: 1; }
.missing-page p { max-width: 58ch; }
.missing-page .eyebrow { margin: 0; }
.missing-page .geometry { grid-column: 2; grid-row: 1 / span 4; align-self: center; }
.return-link { display: inline-flex; align-items: center; gap: 20px; min-height: 48px; justify-self: start; padding: 12px 24px; background: white; clip-path: var(--ticket); }
.return-link:focus-visible { outline-offset: -5px; }
@media (min-width: 1600px) {
  :root { --gutter: max(80px, calc((100vw - 1376px) / 2)); }
}
@media (max-width: 1000px) {
  .hero { grid-template-columns: minmax(0, 1.5fr) minmax(0, .6fr); gap: 32px; }
  .site-footer { flex-direction: column; gap: 16px; }
}
@media (max-width: 700px) {
  .masthead { min-height: 112px; flex-wrap: wrap; justify-content: flex-start; gap: 0; padding-block: 12px; }
  .site-mark { width: 100%; min-height: 48px; font-size: 23px; }
  .guide-label { padding-left: 46px; font-size: 18px; }
  .hero { grid-template-columns: minmax(0, 1fr); gap: 32px; padding-block: 40px; }
  .hero--home .hero-title { font-size: clamp(48px, 12.6vw, 68px); }
  .hero-title { font-size: clamp(40px, 10.6vw, 58px); }
  .hero .geometry { height: 128px; aspect-ratio: auto; }
  .eyebrow { margin-bottom: 18px; }
  .bottom-dock { left: 12px; right: 12px; bottom: max(12px, env(safe-area-inset-bottom)); padding: 8px 12px; }
  .bottom-dock nav { gap: 0; }
  .dock-link { padding: 10px 3px; min-height: 48px; line-height: 1.2; font-size: 17px; }
  .site-footer { padding-block: 32px 124px; }
  .missing-page { padding-block: 44px; grid-template-columns: minmax(0, 1fr); gap: 24px; }
  .missing-page h1 { font-size: 44px; }
  .missing-page .geometry { grid-column: 1; grid-row: 5; height: 150px; }
}
@media print {
  .bottom-dock, .skip-link, .geometry { display: none; }
  .hero { display: block; padding-block: 24px; }
  .masthead, main, .site-footer { width: 100%; }
  .site-footer { padding-block: 24px; }
  .hero--home .hero-title { font-size: 48px; }
  .hero-title { font-size: 40px; }
}