:root {
  /* Design font source notes: Space Mono** from Google Fonts; IBM Plex Mono** from Google Fonts. */
  /* Mono** */
  --paper: #F4EBD8;
  --canvas: #D8C7A5;
  --birch: #B98D62;
  --ink: #4B3A2A;
  --vermilion: #D96B4A;
  --sage: #8EA889;
  --blue: #5B8FD9;
  --vellum: #FFF8E8;
  --display: "Space Mono", "Courier New", monospace;
  --body: "IBM Plex Mono", "Courier New", monospace;
  --detail: "Noto Sans Mono", "Courier New", monospace;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: radial-gradient(circle at 74% 12%, rgba(255, 248, 232, .72), transparent 28%), linear-gradient(115deg, #F4EBD8, #D8C7A5 130%);
  color: var(--ink);
  font-family: var(--body);
  overflow-x: hidden;
}

.paper-grain {
  position: fixed;
  inset: 0;
  pointer-events: none;
  opacity: .28;
  background-image: radial-gradient(#4B3A2A 0.65px, transparent 0.65px), radial-gradient(#B98D62 0.55px, transparent 0.55px);
  background-size: 18px 18px, 27px 27px;
  background-position: 0 0, 9px 11px;
  mix-blend-mode: multiply;
  z-index: 20;
}

.desk-rail {
  position: fixed;
  left: 0;
  top: 0;
  bottom: 0;
  width: 76px;
  padding: 24px 12px;
  border-right: 1px dashed rgba(75, 58, 42, .25);
  background: rgba(255, 248, 232, .32);
  display: flex;
  flex-direction: column;
  gap: 34px;
  z-index: 10;
  font: 11px/1.25 var(--detail);
  letter-spacing: .08em;
  text-transform: uppercase;
  writing-mode: vertical-rl;
}

.stamp-mini {
  color: var(--vermilion);
  border: 1px solid var(--vermilion);
  border-radius: 999px;
  padding: 8px 3px;
}

.desk { margin-left: 76px; }

.chapter {
  min-height: 100vh;
  position: relative;
  padding: 8vh 7vw 8vh 10vw;
  display: grid;
  grid-template-columns: 160px minmax(0, 1fr);
  gap: 34px;
  isolation: isolate;
}

.chapter::after {
  content: "";
  position: absolute;
  left: 7vw;
  right: 7vw;
  bottom: 7vh;
  border-bottom: 1px solid rgba(75, 58, 42, .18);
  transform: rotate(-.2deg);
}

.margin-ledger {
  grid-column: 1;
  align-self: start;
  position: sticky;
  top: 8vh;
  display: flex;
  flex-direction: column;
  gap: 10px;
  font-family: var(--detail);
  font-size: 12px;
  color: rgba(75, 58, 42, .72);
}

.margin-ledger b { font-family: var(--display); color: var(--vermilion); }
.margin-ledger i { color: var(--blue); font-style: normal; }

.wordmark {
  position: absolute;
  top: 9vh;
  left: calc(10vw + 220px);
  font: 700 clamp(25px, 4.8vw, 74px)/1 var(--display);
  letter-spacing: -.07em;
  color: var(--ink);
  transform: rotate(-3deg) scale(.96);
  opacity: 0;
  animation: stampIn .9s .25s cubic-bezier(.2, 1.5, .5, 1) forwards;
}

.stamp-press::after {
  content: "protocol stamp";
  position: absolute;
  right: -60px;
  top: 80%;
  color: var(--vermilion);
  border: 2px solid var(--vermilion);
  border-radius: 50%;
  padding: 18px 10px;
  font: 700 11px var(--display);
  letter-spacing: .02em;
  transform: rotate(14deg);
}

.envelope-chapter { grid-template-rows: 1fr; }

.envelope-object {
  grid-column: 2;
  align-self: center;
  width: min(560px, 62vw);
  height: 330px;
  position: relative;
  transform: translate(7vw, 3vh) rotate(-4deg);
  filter: drop-shadow(0 18px 24px rgba(75, 58, 42, .16));
  animation: envelopeSettle 1.2s .55s cubic-bezier(.2, 1.4, .35, 1) both;
}

.envelope-face, .envelope-flap {
  position: absolute;
  inset: 0;
  border: 2px solid rgba(75, 58, 42, .52);
  background: var(--vellum);
}

.envelope-face {
  border-radius: 18px;
  clip-path: polygon(0 0, 50% 50%, 100% 0, 100% 100%, 0 100%);
}

.envelope-flap {
  transform-origin: top;
  border-radius: 18px 18px 0 0;
  clip-path: polygon(0 0, 100% 0, 50% 64%);
  background: #D8C7A5;
  animation: flapOpen 1.1s 1.15s cubic-bezier(.18, 1.55, .45, 1) forwards;
  z-index: 2;
}

.protocol-stamp, .blue-pencil {
  position: absolute;
  font-family: var(--display);
  font-weight: 700;
}

.protocol-stamp {
  right: 38px;
  top: 38px;
  color: var(--vermilion);
  border: 2px solid var(--vermilion);
  border-radius: 50%;
  padding: 23px 13px;
  transform: rotate(10deg);
}

.blue-pencil { left: 36px; bottom: 35px; color: var(--blue); font-size: 12px; letter-spacing: .12em; }

.unfolded-note {
  grid-column: 2;
  align-self: end;
  max-width: 700px;
  padding: 34px 38px;
  background: rgba(255, 248, 232, .78);
  border: 1px solid rgba(75, 58, 42, .22);
  box-shadow: 0 14px 22px rgba(75, 58, 42, .09);
  transform: translateY(40px) rotate(.8deg);
  clip-path: polygon(0 0, 96% 0, 100% 8%, 100% 100%, 0 100%);
}

.kicker, .dispatch {
  font: 12px var(--detail);
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--blue);
}

h1, h2, h3 { font-family: var(--display); letter-spacing: -.055em; margin: 0; }
h1 { font-size: clamp(34px, 6.4vw, 88px); line-height: .95; }
h2 { font-size: clamp(28px, 4.6vw, 62px); line-height: 1; }
h3 { font-size: clamp(22px, 2.6vw, 38px); }
p { line-height: 1.7; }

.margin-tab, .footnote-capsule {
  border: 1px solid rgba(75, 58, 42, .35);
  background: #FFF8E8;
  color: var(--ink);
  font: 700 13px var(--display);
  cursor: pointer;
  box-shadow: 0 10px 0 rgba(185, 141, 98, .28);
  transition: transform .45s cubic-bezier(.2, 1.7, .45, 1), box-shadow .45s;
}

.margin-tab {
  position: absolute;
  right: 9vw;
  bottom: 12vh;
  padding: 14px 22px;
  border-radius: 22px 22px 6px 22px;
  transform: rotate(3deg);
}

.margin-tab:hover, .footnote-capsule:hover { transform: translateY(5px) rotate(-1deg); box-shadow: 0 4px 0 rgba(185, 141, 98, .28); }

.translation-chapter { grid-template-columns: 160px 1fr 1.1fr 1fr; align-items: center; }
.translation-chapter .margin-ledger { grid-column: 1; }

.sheet, .glossary-panel, .accordion-doc, .wiki-entry {
  background: rgba(255, 248, 232, .82);
  border: 1px solid rgba(75, 58, 42, .22);
  box-shadow: 0 18px 30px rgba(75, 58, 42, .1);
}

.sheet { padding: 28px; min-height: 440px; position: relative; z-index: 2; }
.sheet-left { grid-column: 2; transform: rotate(-1.7deg); }
.sheet-right { grid-column: 4; transform: rotate(1.4deg); }

.term {
  width: 100%;
  display: block;
  margin: 18px 0;
  padding: 16px;
  border: 1px dashed rgba(75, 58, 42, .36);
  border-radius: 999px;
  background: var(--paper);
  color: var(--ink);
  font: 700 15px var(--display);
  cursor: pointer;
  transition: transform .5s cubic-bezier(.2, 1.8, .4, 1), background .3s;
}
.term:hover, .term.active { background: rgba(91, 143, 217, .13); transform: translateX(10px) scale(1.03); }

.ribbon-map { position: absolute; left: 24vw; right: 8vw; width: 63vw; height: 55vh; z-index: 1; overflow: visible; }
.ribbon-map path { fill: none; stroke: var(--blue); stroke-width: 5; stroke-linecap: round; stroke-dasharray: 12 18; opacity: .74; filter: drop-shadow(0 6px 0 rgba(91, 143, 217, .1)); animation: dashTravel 10s linear infinite; }
.ribbon-map path:nth-child(2) { stroke: var(--sage); animation-duration: 13s; }
.ribbon-map path:nth-child(3) { stroke: var(--vermilion); animation-duration: 11s; opacity: .55; }

.glossary-panel {
  grid-column: 3;
  align-self: center;
  z-index: 3;
  padding: 26px;
  border-radius: 34px 34px 12px 34px;
  transform: rotate(.8deg);
  transition: transform .55s cubic-bezier(.2, 1.8, .45, 1);
}
.glossary-panel.bounce { transform: rotate(-.8deg) scale(1.06); }
.glossary-panel span { color: var(--vermilion); font: 700 11px var(--detail); letter-spacing: .14em; text-transform: uppercase; }

.translation-fragment { color: var(--blue); letter-spacing: .05em; }
.stamp-pad { position: absolute; bottom: 26px; right: 28px; padding: 18px 14px; border-radius: 50%; color: var(--vermilion); border: 2px solid currentColor; font: 700 12px var(--display); transform: rotate(-12deg); transition: transform .25s; }
.stamp-pad:hover { transform: rotate(-12deg) scale(.88); }

.corridor-chapter { grid-template-columns: 160px 1fr; }
.corridor-copy { grid-column: 2; max-width: 650px; z-index: 2; }
.vellum-lane { grid-column: 2; position: relative; min-height: 430px; border-top: 1px dashed rgba(75, 58, 42, .22); border-bottom: 1px dashed rgba(75, 58, 42, .22); }
.vellum-note {
  position: absolute;
  padding: 22px 26px;
  background: rgba(255, 248, 232, .58);
  border: 1px solid rgba(91, 143, 217, .22);
  backdrop-filter: blur(2px);
  box-shadow: 0 16px 22px rgba(75, 58, 42, .08);
  font: 13px var(--detail);
  animation: floatNote 6s ease-in-out infinite;
}
.n1 { left: 5%; top: 32%; transform: rotate(-4deg); }
.n2 { left: 35%; top: 12%; transform: rotate(2deg); animation-delay: -1.5s; }
.n3 { right: 8%; bottom: 18%; transform: rotate(-1deg); animation-delay: -3s; }

.bot { position: absolute; width: 78px; height: 44px; border: 2px solid var(--ink); border-radius: 22px 22px 16px 16px; background: #D8C7A5; animation: botDrift 9s ease-in-out infinite; }
.bot::before, .bot::after { content: ""; position: absolute; background: var(--blue); border-radius: 50%; width: 7px; height: 7px; top: 16px; }
.bot::before { left: 24px; } .bot::after { right: 24px; }
.bot span { position: absolute; left: -16px; top: -12px; width: 30px; height: 14px; border: 2px solid var(--ink); border-bottom: 0; border-radius: 14px 14px 0 0; }
.bot-a { left: 16%; bottom: 18%; }
.bot-b { right: 24%; top: 28%; animation-delay: -4s; transform: scale(.85); }

.embassy-kiosk { position: absolute; right: 10vw; top: 12vh; width: 145px; padding: 46px 18px 18px; border: 2px solid var(--ink); border-radius: 70px 70px 14px 14px; background: var(--canvas); text-align: center; font: 11px var(--detail); }
.beacon { position: absolute; top: 15px; left: 50%; width: 18px; height: 18px; margin-left: -9px; border-radius: 50%; background: var(--sage); box-shadow: 0 0 0 0 rgba(142, 168, 137, .45); animation: beacon 2.4s infinite; }

.treaty-chapter { align-items: center; }
.treaty-ribbon { grid-column: 2; display: flex; justify-content: space-around; align-items: center; min-height: 92px; margin-bottom: 34px; background: linear-gradient(90deg, rgba(217, 107, 74, .24), rgba(91, 143, 217, .18), rgba(142, 168, 137, .25)); border: 2px solid rgba(75, 58, 42, .28); border-radius: 999px; transform-origin: left center; transition: transform .7s cubic-bezier(.2, 1.9, .4, 1); }
.treaty-ribbon.stretch { transform: scaleX(1.06) skewX(-3deg); }
.treaty-ribbon span { font: 700 13px var(--display); letter-spacing: .08em; text-transform: uppercase; }

.accordion-doc { grid-column: 2; padding: 42px; max-width: 920px; clip-path: polygon(0 0, 12% 3%, 24% 0, 36% 3%, 48% 0, 60% 3%, 72% 0, 84% 3%, 100% 0, 100% 100%, 0 100%); }
.clause-row { display: grid; grid-template-columns: 70px 1fr; gap: 22px; border-top: 1px solid rgba(75, 58, 42, .18); padding: 16px 0; }
.clause-row b { color: var(--vermilion); }

.wiki-entry { grid-column: 2; padding: 38px; transform: rotate(-.5deg); }
.treaty-table { display: grid; grid-template-columns: repeat(4, minmax(120px, 1fr)); margin-top: 24px; border: 1px solid rgba(75, 58, 42, .25); }
.treaty-table div { padding: 14px; border-right: 1px solid rgba(75, 58, 42, .18); border-bottom: 1px solid rgba(75, 58, 42, .18); font-size: 13px; }
.treaty-table div:nth-child(-n+4) { background: rgba(216, 199, 165, .45); font-weight: 700; }
.sage { color: var(--sage); font-weight: 700; }

.footnote-capsule { grid-column: 2; justify-self: end; width: 310px; margin-top: 28px; padding: 18px 20px; border-radius: 26px 26px 8px 26px; text-align: left; }
.footnote-capsule p { margin: 12px 0 0; max-height: 0; overflow: hidden; transition: max-height .55s cubic-bezier(.2, 1.7, .45, 1); }
.footnote-capsule.open p { max-height: 90px; }

.reveal { opacity: 0; transform: translateY(28px) rotate(var(--tilt, 0deg)); transition: opacity .8s, transform .8s cubic-bezier(.2, 1.3, .45, 1); }
.reveal.visible { opacity: 1; transform: translateY(0) rotate(var(--tilt, 0deg)); }

@keyframes stampIn { 0% { opacity: 0; transform: rotate(-3deg) scale(1.35); filter: blur(4px); } 65% { opacity: 1; transform: rotate(-3deg) scale(.9); } 100% { opacity: 1; transform: rotate(-3deg) scale(1); filter: blur(0); } }
@keyframes envelopeSettle { from { transform: translate(7vw, 10vh) rotate(-8deg) scale(.96); } to { transform: translate(7vw, 3vh) rotate(-4deg) scale(1); } }
@keyframes flapOpen { to { transform: rotateX(178deg); } }
@keyframes dashTravel { to { stroke-dashoffset: -240; } }
@keyframes floatNote { 0%, 100% { translate: 0 0; } 50% { translate: 0 -18px; } }
@keyframes botDrift { 0%,100% { translate: 0 0; rotate: -2deg; } 50% { translate: 34px -18px; rotate: 4deg; } }
@keyframes beacon { to { box-shadow: 0 0 0 28px rgba(142, 168, 137, 0); } }

@media (max-width: 900px) {
  .desk { margin-left: 0; }
  .desk-rail { display: none; }
  .chapter, .translation-chapter { grid-template-columns: 1fr; padding: 7vh 6vw; }
  .margin-ledger, .sheet-left, .sheet-right, .glossary-panel, .corridor-copy, .vellum-lane, .treaty-ribbon, .accordion-doc, .wiki-entry, .footnote-capsule, .envelope-object, .unfolded-note { grid-column: 1; }
  .margin-ledger { position: relative; top: auto; }
  .wordmark { left: 6vw; top: 16vh; }
  .envelope-object { width: 82vw; transform: translate(0, 10vh) rotate(-4deg); }
  .ribbon-map { display: none; }
  .translation-chapter { gap: 22px; }
  .treaty-table { grid-template-columns: 1fr 1fr; }
}