:root {
  --iop-ground: #F5DCE9;
  --iop-ink: #2A2427;
  --iop-accent: #087A70;
  --iop-support: #E5E2E3;
  --iop-surface: #FFFFFF;
  --iop-book: "Cormorant Infant", Georgia, serif;
  --iop-round: "Varela Round", Arial, sans-serif;
}
* { box-sizing: border-box; }
html { scroll-behavior: auto; scroll-padding-top: 24px; }
body { margin: 0; color: var(--iop-ink); background: var(--iop-surface); font-family: var(--iop-round); font-size: 18px; line-height: 1.75; }
img, svg { max-width: 100%; }
img { display: block; }
a { color: var(--iop-accent); text-decoration-thickness: 1px; text-underline-offset: .22em; }
a:hover { text-decoration-thickness: 3px; }
a:focus-visible { outline: 3px solid var(--iop-accent); outline-offset: 6px; }
h1, h2, h3, p, figure { margin: 0; }
h1, h2, h3 { font-family: var(--iop-book); font-weight: 500; }
p + p { margin-top: 1.1em; }
.iop-icon { display: inline-block; width: 23px; height: 23px; flex: 0 0 23px; vertical-align: middle; }
.iop-skip { position: absolute; top: 12px; left: 16px; z-index: 5; transform: translateY(-160%); padding: 8px 16px; background: var(--iop-surface); }
.iop-skip:focus { transform: translateY(0); }

/* A name at the top, a readable footnote register at the bottom. */
.iop-register { min-height: 246px; display: grid; grid-template-columns: 1fr 1fr; padding: 34px max(48px, calc((100vw - 1320px) / 2)); gap: 56px; background: var(--iop-surface); }
.iop-name { align-self: start; width: fit-content; color: var(--iop-ink); text-decoration: none; font-family: var(--iop-book); font-size: clamp(40px, 4.2vw, 64px); line-height: 1.03; letter-spacing: -.035em; white-space: nowrap; }
.iop-name:hover { color: var(--iop-accent); }
.iop-register-links { display: grid; grid-template-columns: 1.06fr 1fr; align-self: end; gap: 0 28px; }
.iop-register-links a { display: flex; align-items: center; gap: 14px; padding: 12px 0; border-top: 1px solid var(--iop-ink); color: var(--iop-ink); font-size: 18px; line-height: 1.4; text-decoration: none; }
.iop-register-links a:first-child { grid-column: 1 / -1; }
.iop-register-links a:hover, .iop-register-links a[aria-current="page"] { color: var(--iop-accent); border-color: var(--iop-accent); }
.iop-register-links a:hover > span:last-of-type { text-decoration: underline; text-underline-offset: 6px; }
.iop-register-links .iop-icon { margin-left: auto; color: var(--iop-accent); }
.iop-register-number { color: var(--iop-accent); font-family: var(--iop-book); font-size: 38px; line-height: 1; letter-spacing: -.03em; }
.iop-register-caption { display: none; }

/* The whole opening is the first beat. The photograph starts after it. */
.iop-entry { display: flex; flex-direction: column; min-height: 100svh; }
.iop-opening { display: flex; flex: 1; flex-direction: column; }
.iop-proposition-field { display: grid; flex: 1; align-items: center; padding: 64px 90px 72px; background: var(--iop-ground); }
.iop-proposition-field h1 { max-width: 1040px; margin: 0 auto; font-size: clamp(70px, 7.2vw, 112px); line-height: .99; text-align: center; letter-spacing: -.035em; text-wrap: balance; }
.iop-h1-keyword { font-style: italic; font-weight: 500; }
.iop-opening-note { position: relative; min-height: 360px; padding: 58px 48px 72px; background: var(--iop-surface); }
.iop-opening-copy { max-width: 720px; margin: 0 auto; }
.iop-lead { font-size: 22px; line-height: 1.6; }
.iop-opening-copy > p + p { margin-top: 26px; }
.iop-opening-parenthesis { position: absolute; width: 164px; height: 360px; left: max(36px, calc(50% - 620px)); top: 12px; }
.iop-mount { padding: 44px 56px 30px; background: var(--iop-surface); }
.iop-mount-frame { width: min(100%, 1000px); margin: 0 auto; }
.iop-mount img { width: 100%; height: auto; aspect-ratio: 8 / 5; object-fit: cover; object-position: 50% 50%; border-radius: 8px; background: var(--iop-support); }
.iop-mount figcaption { display: flex; align-items: flex-start; gap: 14px; max-width: 1000px; margin: 0 auto; padding-top: 24px; font-size: 16px; line-height: 1.6; }
.iop-mount figcaption .iop-icon { margin-top: 2px; color: var(--iop-accent); }

/* Inner pages keep their own photograph and their own opaque reading ground. */
.iop-inner-opening { padding: 22px 56px 66px; background: var(--iop-surface); }
.iop-breadcrumb { display: flex; justify-content: space-between; align-items: center; max-width: 1200px; margin: 0 auto 48px; font-size: 16px; }
.iop-page-icon { width: 38px; height: 38px; color: var(--iop-accent); }
.iop-inner-opening h1 { max-width: 1110px; margin: 0 auto; font-size: clamp(58px, 6.8vw, 98px); text-align: center; line-height: 1.02; letter-spacing: -.03em; text-wrap: balance; }
.iop-inner-copy { display: grid; grid-template-columns: 1.08fr 1fr; gap: 64px; max-width: 1080px; margin: 46px auto 0; align-items: start; }
.iop-inner-copy > p + p { margin-top: 0; padding-top: 5px; }
.iop-photo-band { padding: 0 56px 30px; }
.iop-band-frame { width: min(100%, 1160px); margin: 0 auto; padding-left: 48px; }
.iop-photo-band img { width: 100%; height: auto; aspect-ratio: 2 / 1; object-fit: cover; object-position: 50% 50%; border-radius: 8px; background: var(--iop-support); }
.iop-photo-band figcaption { display: flex; align-items: flex-start; gap: 14px; max-width: 950px; margin: 22px auto 0; font-size: 16px; line-height: 1.6; }
.iop-photo-band figcaption .iop-icon { margin-top: 2px; color: var(--iop-accent); }

/* A proposition, a narrow cut-paper condition, a broad consequence. */
.iop-diptych { padding-top: 112px; }
.iop-proposition { position: relative; max-width: 1320px; margin: 0 auto; padding: 0 150px 46px; }
.iop-topic-number { position: absolute; top: -28px; left: 8px; color: var(--iop-accent); font-family: var(--iop-book); font-size: 144px; font-weight: 400; line-height: 1; letter-spacing: -.065em; }
.iop-proposition h2 { max-width: 930px; margin: 0 auto 30px; text-align: center; font-size: clamp(48px, 5.2vw, 76px); line-height: 1.03; letter-spacing: -.025em; text-wrap: balance; }
.iop-proposition > p { max-width: 760px; margin: 0 auto; font-size: 20px; line-height: 1.75; }
.iop-descent { position: relative; padding: 24px 48px 0; }
.iop-parenthesis { position: absolute; width: 140px; height: 308px; top: 34px; left: calc(50% - 425px); }
.iop-condition { position: relative; display: flex; align-items: center; min-height: 320px; width: min(100%, 370px); margin: 0 auto; padding: 44px 38px 76px; color: var(--iop-surface); background: var(--iop-accent); clip-path: polygon(0 0, 100% 0, 100% calc(100% - 34px), calc(100% - 34px) 100%, 0 100%); }
.iop-condition p { font-family: var(--iop-book); font-size: 36px; line-height: 1.15; font-weight: 500; }
.iop-condition-icon { position: absolute; width: 27px; height: 27px; left: 38px; bottom: 27px; }
.iop-consequence { padding: 62px max(48px, calc((100vw - 1080px) / 2)) 76px; background: var(--iop-support); }
.iop-consequence-copy { display: grid; grid-template-columns: 1fr 1fr; gap: 76px; max-width: 1080px; margin: 0 auto; align-items: start; }
.iop-consequence-copy p { margin: 0; }
.iop-consequence-copy > p:first-child { font-size: 20px; line-height: 1.75; }
.iop-diptych:nth-of-type(even) .iop-consequence { background: var(--iop-surface); border-bottom: 1px solid var(--iop-support); }

.iop-source-register { padding: 62px 56px 110px; max-width: 1320px; margin: 0 auto; }
.iop-source-register > h2 { max-width: 750px; margin: 0 0 68px; font-size: 76px; line-height: 1.02; letter-spacing: -.025em; }
.iop-source-item { display: grid; grid-template-columns: 1fr 1fr; gap: 84px; padding: 44px 0 50px; border-top: 1px solid var(--iop-ink); }
.iop-source-item h3 { font-size: 43px; line-height: 1.08; letter-spacing: -.015em; }
.iop-source-item h3 a { color: var(--iop-ink); text-decoration-thickness: 1px; }
.iop-source-item h3 a:hover { color: var(--iop-accent); text-decoration-thickness: 2px; }
.iop-source-byline { margin-top: 20px; font-size: 16px; line-height: 1.5; }
.iop-source-item > p { padding-top: 4px; }

/* A saturated colophon gives the long reading pages a clear end. */
.iop-colophon { padding: 72px 56px 36px; color: var(--iop-surface); background: var(--iop-accent); }
.iop-colophon-inner { max-width: 1210px; margin: 0 auto; }
.iop-reading-label { display: flex; align-items: center; gap: 28px; font-family: var(--iop-book); font-size: 92px; line-height: 1; letter-spacing: -.025em; }
.iop-reading-label i, .iop-reading-label svg { width: 45px; height: 45px; flex-shrink: 0; }
.iop-reading-links { display: grid; grid-template-columns: repeat(4, 1fr); gap: 14px 32px; margin: 42px 0 66px; }
.iop-reading-links a { display: block; width: fit-content; padding: 8px 0; text-decoration-thickness: 1px; }
.iop-reading-links a:hover { text-decoration-thickness: 3px; }
.iop-footer-note { max-width: 810px; font-size: 16px; }
.iop-copyright { margin-top: 24px; font-size: 16px; }
.iop-colophon a { color: var(--iop-surface); }
.iop-colophon a:focus-visible { outline-color: var(--iop-surface); }
.iop-inner-opening a, .iop-consequence a, .iop-missing-page a { color: var(--iop-ink); }
.iop-missing-page { padding: 48px 56px 110px; background: var(--iop-ground); }
.iop-missing-page h1 { max-width: 950px; margin: 0 auto 36px; font-size: clamp(58px, 7vw, 98px); line-height: 1.02; letter-spacing: -.03em; }
.iop-missing-page > p { max-width: 950px; margin: 0 auto; }

@media (min-width: 1600px) {
  .iop-proposition-field { padding-top: 86px; padding-bottom: 92px; }
}
@media (max-width: 1100px) {
  .iop-register { padding-left: 32px; padding-right: 32px; gap: 32px; }
  .iop-name { white-space: normal; max-width: 360px; }
  .iop-register-links { gap: 0 20px; }
  .iop-register-links a { gap: 10px; font-size: 16px; }
  .iop-register-number { font-size: 30px; }
  .iop-register-links .iop-icon { display: none; }
  .iop-opening-copy { max-width: 610px; padding-left: 48px; }
  .iop-opening-parenthesis { width: 98px; height: 215px; left: 28px; top: 52px; }
  .iop-proposition { padding-left: 120px; padding-right: 120px; }
  .iop-topic-number { left: 28px; top: -10px; font-size: 104px; }
  .iop-parenthesis { left: 40px; width: 110px; height: 242px; }
  .iop-inner-copy, .iop-consequence-copy { gap: 40px; }
  .iop-source-item { gap: 48px; }
}
@media (max-width: 700px) {
  body { font-size: 17px; line-height: 1.75; }
  .iop-register { display: block; min-height: 0; padding: 25px 24px 22px; }
  .iop-name { display: block; max-width: none; font-size: 39px; line-height: 1.06; letter-spacing: -.035em; }
  .iop-register-links { margin-top: 26px; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); gap: 0 16px; }
  .iop-register-links a { min-height: 58px; padding: 11px 0; gap: 10px; font-size: 16px; line-height: 1.4; }
  .iop-register-links a:first-child { grid-column: auto; }
  .iop-register-number { font-size: 26px; flex-shrink: 0; }
  .iop-register-caption { display: flex; align-items: center; gap: 10px; border-top: 1px solid var(--iop-ink); padding: 11px 0; font-family: var(--iop-book); font-size: 22px; line-height: 1.1; }
  .iop-register-caption i, .iop-register-caption svg { width: 22px; height: 22px; flex-shrink: 0; color: var(--iop-accent); }
  .iop-proposition-field { padding: 46px 24px 52px; }
  .iop-proposition-field h1 { font-size: clamp(42px, 12.55vw, 74px); line-height: 1.025; letter-spacing: -.035em; }
  .iop-opening-note { min-height: 0; padding: 28px 24px 38px; }
  .iop-opening-copy { max-width: none; padding: 0; }
  .iop-lead { font-size: 19px; line-height: 1.6; }
  .iop-opening-copy > p + p { margin-top: 22px; }
  .iop-opening-parenthesis { position: static; width: 37px; height: 82px; margin-bottom: 24px; }
  .iop-mount { padding: 0 0 22px; }
  .iop-mount img { border-radius: 0; aspect-ratio: 16 / 10; }
  .iop-mount figcaption { padding: 20px 24px 0; gap: 12px; font-size: 16px; }
  .iop-mount figcaption .iop-icon, .iop-photo-band figcaption .iop-icon { width: 21px; height: 21px; flex-basis: 21px; }
  .iop-inner-opening { padding: 18px 24px 38px; }
  .iop-breadcrumb { margin-bottom: 34px; gap: 14px; }
  .iop-page-icon { width: 30px; height: 30px; flex-shrink: 0; }
  .iop-inner-opening h1 { font-size: clamp(42px, 11.8vw, 68px); text-align: left; line-height: 1.04; letter-spacing: -.025em; }
  .iop-inner-copy { display: block; margin-top: 30px; }
  .iop-inner-copy > p + p { margin-top: 22px; padding: 0; }
  .iop-photo-band { padding: 0 24px 8px; }
  .iop-band-frame { padding-left: 0; }
  .iop-photo-band img { aspect-ratio: 2 / 1; }
  .iop-photo-band figcaption { margin-top: 18px; gap: 12px; font-size: 16px; }
  .iop-diptych { padding-top: 70px; }
  .iop-proposition { padding: 0 24px 32px; }
  .iop-topic-number { position: static; display: block; margin-bottom: 24px; font-size: 72px; line-height: .9; letter-spacing: -.045em; }
  .iop-proposition h2 { margin-bottom: 26px; text-align: left; font-size: 45px; line-height: 1.04; letter-spacing: -.025em; }
  .iop-proposition > p { font-size: 18px; line-height: 1.75; }
  .iop-descent { padding: 0 24px; }
  .iop-parenthesis { position: static; width: 35px; height: 78px; margin-bottom: 26px; }
  .iop-condition { width: min(100%, 278px); min-height: 278px; padding: 34px 28px 76px; clip-path: polygon(0 0, 100% 0, 100% calc(100% - 28px), calc(100% - 28px) 100%, 0 100%); }
  .iop-condition p { font-size: 32px; line-height: 1.18; }
  .iop-condition-icon { left: 28px; bottom: 26px; }
  .iop-consequence { padding: 38px 24px 48px; }
  .iop-consequence-copy { display: block; }
  .iop-consequence-copy > p:first-child { font-size: 18px; line-height: 1.75; }
  .iop-consequence-copy p + p { margin-top: 26px; }
  .iop-source-register { padding: 36px 24px 70px; }
  .iop-source-register > h2 { margin-bottom: 42px; font-size: 48px; }
  .iop-source-item { display: block; padding: 30px 0 38px; }
  .iop-source-item h3 { font-size: 35px; }
  .iop-source-byline { margin-top: 18px; }
  .iop-source-item > p { margin-top: 24px; padding: 0; }
  .iop-colophon { padding: 48px 24px 28px; }
  .iop-reading-label { gap: 18px; font-size: 52px; }
  .iop-reading-label i, .iop-reading-label svg { width: 30px; height: 30px; }
  .iop-reading-links { grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); gap: 10px 20px; margin: 28px 0 42px; }
  .iop-reading-links a { font-size: 16px; }
  .iop-missing-page { padding: 34px 24px 72px; }
  .iop-missing-page h1 { font-size: 50px; }
}
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { scroll-behavior: auto; transition: none; animation: none; }
}