:root {
  --ink: #f4efe6;
  --paper: #090807;
  --muted: rgba(244, 239, 230, 0.62);
  --line: rgba(244, 239, 230, 0.18);
}

* {
  box-sizing: border-box;
  font-stretch: inherit;
  font-width: inherit;
  font-variation-settings: inherit;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: Arial, "Helvetica Neue", Helvetica, sans-serif;
  font-stretch: 150%;
  font-width: 150%;
  font-variation-settings: "wdth" 150;
  letter-spacing: 0;
}

a {
  color: inherit;
  text-decoration: none;
}

.book-topbar {
  position: sticky;
  z-index: 20;
  top: 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 18px clamp(18px, 4vw, 54px);
  border-bottom: 1px solid var(--line);
  background: rgba(9, 8, 7, 0.76);
  backdrop-filter: blur(16px);
  text-transform: uppercase;
}

.wordmark {
  font-size: clamp(18px, 2vw, 26px);
  font-weight: 800;
}

.book-topbar nav {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 14px clamp(16px, 2vw, 30px);
  color: var(--muted);
  font-size: 11px;
}

.book-shell {
  width: min(1280px, calc(100vw - 34px));
  margin: 0 auto;
  padding: 44px 0 90px;
}

.book-intro {
  display: grid;
  gap: 10px;
  margin: 0 0 34px;
  text-transform: uppercase;
}

.book-intro p {
  margin: 0;
  color: var(--muted);
  font-size: 12px;
}

.book-intro h1 {
  margin: 0;
  font-size: clamp(42px, 9vw, 128px);
  line-height: 0.86;
}

.page-stack {
  display: grid;
  gap: 0;
}

.portfolio-page {
  position: relative;
  margin: 0 auto;
  width: min(100%, 1180px);
}

.portfolio-page img {
  display: block;
  width: 100%;
  height: auto;
  border: 0;
  background: #111;
  box-shadow: none;
}

.portfolio-page figcaption {
  position: absolute;
  right: 10px;
  bottom: 8px;
  padding: 4px 7px;
  background: rgba(0, 0, 0, 0.44);
  color: rgba(244, 239, 230, 0.72);
  font-size: 10px;
  text-transform: uppercase;
}

.page-index {
  position: fixed;
  z-index: 18;
  right: 18px;
  top: 50%;
  display: grid;
  gap: 8px;
  width: 138px;
  transform: translateY(-50%);
  color: rgba(244, 239, 230, 0.56);
  font-size: 10px;
  text-align: right;
  text-transform: uppercase;
}

.page-index a {
  padding: 4px 0;
}

.page-index a:hover {
  color: var(--ink);
}

@media (max-width: 900px) {
  .book-topbar {
    align-items: flex-start;
  }

  .book-topbar nav {
    display: none;
  }

  .book-shell {
    width: min(100vw - 20px, 760px);
    padding-top: 28px;
  }

  .book-intro {
    margin-bottom: 22px;
  }

  .page-index {
    position: sticky;
    top: 62px;
    right: auto;
    display: flex;
    width: auto;
    margin: 0 10px 14px;
    padding: 9px 10px;
    overflow-x: auto;
    border: 1px solid var(--line);
    background: rgba(9, 8, 7, 0.78);
    backdrop-filter: blur(12px);
    transform: none;
    text-align: left;
    white-space: nowrap;
  }

  .portfolio-page figcaption {
    font-size: 9px;
  }
}