:root {
  color-scheme: light;
  --ink: #151915;
  --dark: #202820;
  --pitch: #263b2e;
  --paper: #f1f1e9;
  --pale: #dfe7d9;
  --light: #fafbf4;
  --muted: #4e5a50;
  --fog: #c9d2c7;
  --accent: #d8f45d;
  --gutter: clamp(20px, 5vw, 84px);
  --space: clamp(68px, 9vw, 148px);
  --body: clamp(1rem, .96rem + .22vw, 1.2rem);
  --lead: clamp(1.25rem, 1.02rem + 1vw, 1.9rem);
  --heading: clamp(2.65rem, 7vw, 7.25rem);
  --small: .875rem;
  --ease: cubic-bezier(.2,.65,.3,1);
}
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; background: var(--paper); color: var(--ink); font: 400 var(--body)/1.56 "Helvetica Neue", Helvetica, Arial, sans-serif; }
h1, h2, h3, p, figure, dl, dd { margin: 0; }
p + p { margin-top: 1em; }
h1, h2, h3 { font-weight: 800; line-height: .95; letter-spacing: -.07em; }
h2 { font-size: var(--heading); }
h3 { font-size: clamp(1.55rem, 2.7vw, 2.65rem); }
a { color: inherit; text-decoration: none; }
img { display: block; width: 100%; height: auto; }
:focus-visible { outline: 3px solid currentColor; outline-offset: 5px; }
::selection { background: var(--accent); color: var(--ink); }
.wrap { width: min(100% - 2 * var(--gutter), 1440px); margin-inline: auto; }
.sr-only, .viewer input, .skip:not(:focus) { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip-path: inset(50%); white-space: nowrap; }
.skip { position: absolute; z-index: 2; top: 10px; left: var(--gutter); padding: 10px 18px; background: var(--accent); color: var(--ink); }
.mast, .opening, .footer { background: var(--ink); color: var(--light); }
.mast-inner, .footer-inner { display: flex; align-items: center; justify-content: space-between; gap: 16px 24px; }
.mast-inner { min-height: 72px; }
.wordmark { font-size: 1.15rem; font-weight: 800; letter-spacing: -.045em; white-space: nowrap; }
.footer h2 span { color: var(--accent); display: block; }
nav { display: flex; gap: clamp(10px, 3vw, 36px); align-items: center; }
nav a { display: inline-flex; align-items: center; min-height: 44px; font-weight: 650; font-size: var(--small); }
nav a:hover, .text-link:hover { text-decoration: underline; text-underline-offset: .3em; }
.opening-inner { padding-block: clamp(34px, 6vw, 84px) var(--space); }
.cover { display: grid; grid-template-columns: minmax(0, 4fr) minmax(0, 7fr); align-items: center; gap: clamp(28px, 4vw, 74px); }
.cover-copy h1 { font-size: clamp(3.25rem, 6.35vw, 7.1rem); }
.cover-copy > p:first-of-type { max-width: 27ch; margin-top: 26px; font-size: var(--lead); line-height: 1.27; }
.action { margin-top: 26px; padding: 12px 17px; min-height: 48px; display: inline-flex; align-items: center; gap: 20px; background: var(--accent); color: var(--ink); font-weight: 750; font-size: 1rem; }
.action:hover span, .text-link:hover span { transform: translateY(3px); }
.action span, .text-link span { display: inline-block; transition: transform .22s var(--ease); }
.cover-meta { color: var(--fog); font-size: var(--small); margin-top: 18px; }
.viewer { min-width: 0; padding: 0; border: 0; margin: 0; }
.screen { padding: clamp(9px, 1.4vw, 19px); background: var(--dark); }
.screen img { aspect-ratio: 1100 / 688; object-fit: contain; background: var(--ink); }
.screen figcaption { display: flex; justify-content: space-between; gap: 8px; font-size: var(--small); padding-top: 10px; color: var(--light); }
.screen figcaption span { color: var(--fog); }
.world-cover, #cover-world:checked ~ .screen .cup-cover { display: none; }
#cover-world:checked ~ .screen .world-cover { display: block; }
.switch { display: grid; grid-template-columns: repeat(2,minmax(0,1fr)); margin-top: 8px; gap: 8px; }
.switch label { display: grid; place-items: center; min-height: 46px; cursor: pointer; font-size: var(--small); font-weight: 750; color: var(--light); background: var(--dark); }
.switch label:hover { text-decoration: underline; text-underline-offset: .25em; }
#cover-cup:checked ~ .switch label[for="cover-cup"], #cover-world:checked ~ .switch label[for="cover-world"] { color: var(--ink); background: var(--accent); }
#cover-cup:focus-visible ~ .switch label[for="cover-cup"], #cover-world:focus-visible ~ .switch label[for="cover-world"] { outline: 3px solid var(--light); outline-offset: 3px; }
.brief { display: grid; grid-template-columns: minmax(0, 4fr) minmax(0, 7fr); align-items: start; gap: 26px clamp(28px, 4vw, 74px); margin-top: var(--space); }
.brief h2 { font-size: clamp(2.8rem,5.35vw,6rem); position: sticky; top: 36px; }
.brief p:not(.lead) { color: var(--fog); max-width: 64ch; }
.lead { font-size: var(--lead); line-height: 1.24; letter-spacing: -.025em; font-weight: 570; max-width: 39ch; }
.chapter, .strategy, .measurement, .contribution { padding-block: var(--space); scroll-margin-top: 12px; }
.strategy { background: var(--pale); }
.strategy h2 + .lead { margin-top: 20px; }
.strategy-list { margin-top: 24px; }
.strategy-list > div + div { margin-top: 20px; }
.strategy-list dt { font-weight: 750; }
.strategy-list dd { color: var(--muted); }
.chapter-head { display: grid; grid-template-columns: minmax(0, 7fr) minmax(0, 4fr); align-items: end; gap: 22px 34px; margin-bottom: clamp(32px, 5vw, 72px); }
.phase { margin-bottom: 13px; color: var(--muted); font-size: var(--small); font-weight: 750; }
.feature { width: min(100%, 1120px); margin-inline: auto; }
.chapter figure a { display: block; background: var(--dark); overflow: hidden; }
.chapter figure img { transition: transform .4s var(--ease); }
.chapter figure a:hover img { transform: scale(1.025); }
.chapter figcaption { display: grid; gap: 3px; padding-top: 14px; color: var(--muted); font-size: 1rem; }
.chapter figcaption strong { font-size: 1.12rem; color: var(--ink); }
.pair { display: grid; grid-template-columns: repeat(2,minmax(0,1fr)); gap: clamp(24px, 4.5vw, 66px); }
.feature + .pair { margin-top: clamp(36px, 6vw, 92px); }
.year-round { background: var(--pitch); color: var(--light); }
.year-round .phase, .year-round figcaption { color: var(--fog); }
.year-round figcaption strong { color: var(--light); }
.magazine { grid-template-columns: minmax(0, 7fr) minmax(0, 5fr); align-items: end; }
.quiz { margin-top: clamp(32px, 5vw, 68px); display: flex; align-items: baseline; gap: 14px 32px; flex-wrap: wrap; }
.quiz h3 { color: var(--accent); }
.quiz p { max-width: 45ch; }
.measurement h2 { font-size: clamp(2.65rem, 5.65vw, 6rem); }
.metrics { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 26px 38px; }
.metrics dt { font-weight: 750; }
.metrics dd { display: grid; gap: 8px; color: var(--muted); max-width: 30ch; }
.metrics strong { color: var(--ink); font-size: var(--heading); line-height: 1; letter-spacing: -.07em; }
.market-source { margin-top: 24px; }
.contribution { background: var(--pale); }
.closing-grid { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); gap: 24px 54px; }
.closing-grid h2 { font-size: clamp(2.7rem, 5.7vw, 6.2rem); }
.contribution-head { display: flex; flex-wrap: wrap; align-items: baseline; justify-content: space-between; gap: 18px 32px; }
.contribution-output { color: var(--muted); font-weight: 650; }
.contribution-output strong { color: var(--ink); font-size: var(--lead); }
.contribution-roles { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 32px clamp(24px, 4vw, 72px); margin-top: clamp(34px, 6vw, 88px); }
.contribution-roles dt { font-size: clamp(2rem, 4.2vw, 4.75rem); font-weight: 800; line-height: 1; letter-spacing: -.065em; }
.contribution-roles dd { margin-top: 14px; max-width: 35ch; color: var(--muted); }
.text-link { display: inline-flex; align-items: center; gap: 8px; min-height: 44px; font-weight: 750; }
.footer { padding-block: clamp(48px, 7vw, 94px); }
.footer-inner { align-items: end; }
.footer h2 { margin-top: 14px; font-size: clamp(2.7rem, 7.7vw, 8.7rem); }
.footer p { color: var(--fog); font-size: var(--small); }
.footer nav { align-items: flex-end; }
[data-reveal].enter { animation: rise .52s var(--ease) both; }
.screen figure { animation: cover-in .35s var(--ease) both; }
@keyframes rise { from { opacity: .75; transform: translateY(14px); } }
@keyframes cover-in { from { opacity: .55; transform: scale(.991); } }

@media (max-width: 920px) {
  .cover { grid-template-columns: minmax(0, 1fr) minmax(0, 1.3fr); gap: 22px; }
  .cover-copy h1 { font-size: clamp(3.2rem, 7vw, 5.2rem); }
}
@media (max-width: 690px) {
  .cover, .brief, .chapter-head, .closing-grid, .pair, .metrics, .contribution-roles { grid-template-columns: minmax(0,1fr); }
  .cover { gap: 28px; }
  .cover-copy h1 { font-size: clamp(3.2rem, 12vw, 5rem); }
  .cover-copy > p:first-of-type { margin-top: 18px; }
  .action { margin-top: 18px; }
  .brief h2 { position: static; }
  .phase { margin-bottom: 9px; }
  .footer-inner { align-items: flex-start; flex-direction: column; }
}
@media (max-width: 420px) {
  .mast-inner { flex-wrap: wrap; gap: 2px 12px; padding-block: 10px 4px; }
  .wordmark { font-size: 1.05rem; }
  .mast nav { gap: 10px; flex-wrap: wrap; }
  .mast nav a { font-size: .8125rem; }
  .screen figcaption { flex-wrap: wrap; column-gap: 12px; }
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation: none !important; transition: none !important; }
}