/* Two sides of the same publication. */
html[data-side] {
  --edition-gold: #766444;
  scroll-padding-top: 5rem;
}

html[data-side] body {
  transition: background-color .24s ease;
}

.edition-cover {
  width: clamp(240px, 45vw, 440px);
  aspect-ratio: 2 / 3;
  margin: 0 auto 1.7rem;
  perspective: 1400px;
  container-type: inline-size;
}

.cover-turn {
  width: 100%;
  height: 100%;
  transform-origin: center;
}

.edition-cover .page-cover {
  width: 100%;
  margin: 0;
}

.edition-nav {
  display: flex;
  justify-content: center;
  gap: 1.3rem;
  font-size: .79rem;
  line-height: 1.4;
}

.edition-nav a {
  display: flex;
  align-items: center;
  gap: .5rem;
  padding: .55rem 0;
  color: var(--muted-color);
  text-decoration: none;
  border-bottom: 0;
}

.side-letter {
  display: grid;
  place-items: center;
  width: 1.7rem;
  height: 1.7rem;
  border: 1px solid var(--border-color);
  border-radius: 50%;
  font-size: .75rem;
  flex-shrink: 0;
}

.edition-nav a[aria-current] {
  color: var(--accent-color);
}

.edition-nav a[aria-current] .side-letter {
  background: var(--accent-color);
  color: var(--page-background);
  border-color: var(--accent-color);
}

.edition-nav a:hover {
  color: var(--edition-gold);
}

.flip-link {
  display: inline-block;
  padding: .65rem .25rem;
  color: var(--edition-gold);
  font-size: .9rem;
  text-decoration: none;
  letter-spacing: .025em;
  border-bottom: 0;
}

.flip-link span {
  display: inline-block;
  margin-left: .4rem;
  font-size: 1.25em;
}

.flip-link:hover span {
  transform: rotate(35deg);
}

html[data-side] :focus-visible {
  outline: 2px solid var(--edition-gold);
  outline-offset: 5px;
}

.edition-bar {
  position: fixed;
  top: 0;
  left: 50%;
  transform: translateX(-50%);
  z-index: 10;
  width: min(100%, 760px);
  padding: .35rem 1.5rem;
  background: var(--page-background);
  border-bottom: 1px solid var(--border-color);
  display: flex;
  justify-content: space-between;
  align-items: center;
  box-shadow: 0 5px 20px #0001;
}

.edition-bar[hidden] {
  display: none;
}

.edition-bar .edition-nav {
  gap: 1rem;
}

.edition-nav-compact .side-letter {
  width: 1.4rem;
  height: 1.4rem;
}

.letters-link {
  border-bottom: 0;
  color: var(--muted-color);
  font-size: .8rem;
  padding: .6rem 0 .6rem .8rem;
  text-decoration: none;
}

.edition-skip {
  position: fixed;
  top: -100px;
  left: 1rem;
  z-index: 20;
  padding: .75rem 1rem;
  background: var(--page-background);
  color: var(--accent-color);
}

.edition-skip:focus {
  top: .5rem;
}

.side-leave .cover-turn {
  animation: turn-away .24s ease-in forwards;
}

.side-enter .cover-turn {
  animation: turn-in .3s ease-out both;
}

html[data-side="a"].side-leave body, html[data-side="a"].side-leave main {
  background-color: #22231f;
}

html[data-side="b"].side-leave body, html[data-side="b"].side-leave main {
  background-color: #f6f4f0;
}

@keyframes turn-away {
  to {
    transform: rotateY(90deg);
    opacity: .65;
  }

}

@keyframes turn-in {
  from {
    transform: rotateY(-90deg);
    opacity: .65;
  }

  to {
    transform: rotateY(0);
    opacity: 1;
  }

}

html[data-side="b"] {
  color-scheme: dark;
  --background: #161714;
  --page-background: #22231f;
  --border-color: #45463b;
  --accent-color: #ece5d6;
  --muted-color: #b4b0a2;
  --edition-gold: #c4b085;
}

html[data-side="b"] body {
  color: #dcd8cd;
}

html[data-side="b"] main {
  padding-left: 3.5rem;
  padding-right: 3.5rem;
  box-shadow: 0 8px 50px #0003;
  transition: background-color .24s ease;
}

.b-cover {
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: center;
  height: 100%;
  padding: 9cqw 7cqw 7cqw;
  color: #e8e0cb;
  background: radial-gradient(ellipse at 45% 10%, #414239, #262721 70%);
  border: 1px solid #6d6d58;
  box-shadow: 0 18px 40px #0005;
}

.b-cover::before {
  content: '';
  pointer-events: none;
  position: absolute;
  inset: 3%;
  border: 1px solid #88816b77;
}

.b-cover::after {
  content: '';
  position: absolute;
  pointer-events: none;
  inset: 0;
  opacity: .08;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 180 180' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.72' numOctaves='3' stitchTiles='stitch'/%3E%3C/filter%3E%3Cpath fill='%23fff' filter='url(%23n)' opacity='.7' d='M0 0h180v180H0z'/%3E%3C/svg%3E");
}

.cover-masthead {
  font-size: 3.4cqw;
  text-transform: uppercase;
  letter-spacing: .14em;
}

.cover-side {
  font-size: 2.5cqw;
  text-transform: uppercase;
  letter-spacing: .3em;
  color: #bcb39c;
  margin-top: 2cqw;
}

.page-header .b-cover h1 {
  font-weight: 400;
  text-transform: uppercase;
  letter-spacing: -.035em;
  font-size: 16cqw;
  line-height: 1.02;
  color: #ece5d6;
  margin: auto 0 .15em;
}

.cover-rule {
  height: 1px;
  width: 28%;
  background: #a49775;
  margin: 3cqw 0 4cqw;
  flex-shrink: 0;
}

.cover-deck {
  font-size: 4cqw;
  line-height: 1.5;
}

.cover-correspondent {
  font-size: 4cqw;
  font-style: italic;
  margin-top: 4cqw;
}

.cover-phi {
  font-size: 11cqw;
  line-height: 1;
  color: #b4a789;
  margin-top: auto;
  padding-top: 4cqw;
}

.b-invitation {
  max-width: 430px;
  margin: 2.3rem auto .8rem;
  font-size: 1.1rem;
  line-height: 1.75;
}

.begin-reading {
  border-bottom: 0;
  display: inline-block;
  padding: .6rem;
  color: var(--edition-gold);
  text-decoration-thickness: 1px;
  text-underline-offset: .35em;
}

.markdown-action {
  margin-top: 1.5rem;
  text-align: center;
}

.copy-markdown {
  display: inline-grid;
  border: 1px solid var(--edition-gold);
  border-radius: 3px;
  background: transparent;
  color: var(--edition-gold);
  font: inherit;
  font-size: .9rem;
  padding: .65rem 1rem;
  cursor: pointer;
}

.copy-markdown span {
  grid-area: 1 / 1;
  white-space: nowrap;
}

.copy-size {
  visibility: hidden;
}

.copy-markdown:hover {
  background: rgb(196 176 133 / 10%);
}

.letter-contents {
  margin: 4rem 0 0;
}

.letter-contents h2 {
  text-transform: uppercase;
  letter-spacing: .2em;
  font-size: .72rem;
  font-weight: 400;
  color: var(--muted-color);
  margin-bottom: 1rem;
}

.letter-contents ol {
  list-style: none;
  margin: 0;
  padding: 0;
}

.letter-contents li {
  border-top: 1px solid var(--border-color);
}

.letter-contents li:last-child {
  border-bottom: 1px solid var(--border-color);
}

.letter-contents a {
  display: grid;
  grid-template-columns: 2rem 1fr auto;
  gap: 1rem;
  padding: 1rem 0;
  color: var(--accent-color);
  text-decoration: none;
  font-size: 1.05rem;
  line-height: 1.45;
  border-bottom: 0;
}

.track-number, .letter-contents a > :last-child {
  color: var(--edition-gold);
}

.letter-contents a:hover {
  color: var(--edition-gold);
}

.attack-letter {
  padding-top: 6rem;
  scroll-margin-top: -6rem;
}

.letter-heading {
  font-size: .92rem;
  line-height: 1.5;
  font-weight: 400;
  color: var(--muted-color);
  margin: 0 0 2rem;
}

.letter-heading > span {
  display: block;
  text-transform: uppercase;
  letter-spacing: .18em;
  font-size: .72rem;
  color: var(--edition-gold);
  margin-bottom: .55rem;
}

.salutation {
  font-style: italic;
  margin-bottom: 1.2rem;
  font-size: 1.05rem;
}

.rallying-cry {
  font-size: clamp(1.9rem, 3.5vw, 2.65rem);
  line-height: 1.17;
  letter-spacing: -.02em;
  font-weight: 400;
  color: var(--accent-color);
  margin: 0 0 1.8rem;
  text-wrap: balance;
}

.attack-opening {
  font-size: 1.23rem;
  line-height: 1.65;
  color: var(--accent-color);
  margin-bottom: 2rem;
}

.attack-body {
  font-size: 1.1rem;
  line-height: 1.85;
}

.attack-body p {
  margin: 0 0 1.3rem;
}

.concept-link {
  color: inherit;
  text-decoration: underline;
  text-decoration-color: #a4936d;
  text-decoration-thickness: 1px;
  text-underline-offset: .22em;
}

.concept-link:hover {
  color: var(--edition-gold);
}

.signature {
  margin-top: 2rem;
  font-size: 1rem;
  color: var(--muted-color);
  line-height: 1.9;
}

.signature span {
  font-size: 1.65rem;
  color: var(--edition-gold);
  font-style: italic;
}

.attack-letter + .attack-letter {
  margin-top: 4rem;
  border-top: 1px solid var(--border-color);
}

.b-footer {
  border-top: 1px solid var(--border-color);
  margin-top: 6rem;
  padding: 4rem 0 0;
  text-align: center;
}

.footer-phi {
  color: var(--edition-gold);
  font-size: 3rem;
}

.b-footer > p {
  font-size: 1.7rem;
  line-height: 1.35;
  margin: 1.5rem 0 .8rem;
  color: var(--accent-color);
}

.b-footer small {
  display: block;
  color: var(--muted-color);
  font-size: .8rem;
  line-height: 1.7;
  margin-top: 3.5rem;
}

@media (max-width: 600px) {
  html[data-side] main {
    padding-top: 2.5rem;
    padding-left: 1.5rem;
    padding-right: 1.5rem;
  }

  html[data-side="b"] main {
    padding-left: 1.5rem;
    padding-right: 1.5rem;
  }

  .edition-cover {
    width: min(100%, 330px);
  }

  .edition-nav {
    gap: .8rem;
    font-size: .72rem;
  }

  .edition-bar {
    padding: .35rem 1rem;
  }

  .edition-bar .edition-nav {
    gap: .8rem;
  }

  .b-invitation {
    font-size: 1.05rem;
  }

  .attack-letter {
    padding-top: 4rem;
    scroll-margin-top: -4rem;
  }

  .attack-letter + .attack-letter {
    margin-top: 3rem;
  }

  .attack-body {
    font-size: 1.075rem;
    line-height: 1.8;
  }

  .attack-opening {
    font-size: 1.15rem;
  }

  .letter-contents a {
    gap: .65rem;
    font-size: 1rem;
    grid-template-columns: 1.6rem 1fr auto;
  }

}

@media (prefers-reduced-motion: reduce) {
  html[data-side] *, html[data-side] *::before, html[data-side] *::after {
    animation: none !important;
    transition: none !important;
    scroll-behavior: auto !important;
  }

}

@media print {
  html[data-side="b"] {
    color-scheme: light;
    --accent-color: #222;
    --muted-color: #555;
    --edition-gold: #555;
    --page-background: white;
    --background: white;
  }

  html[data-side="b"] body {
    color: #222;
  }

  .edition-bar, .edition-nav, .flip-link, .edition-skip, .markdown-action {
    display: none;
  }

  .attack-letter {
    break-before: page;
  }

  .b-cover {
    color: #222;
    background: white;
    box-shadow: none;
  }

}