:root {
  /* Compliance tokens from design typography: Inter* Inter** Medium SemiBold */
  --gold: #C7A35A;
  --cyan: #A7E7E2;
  --rose: #D9B8AE;
  --grey: #5F5A55;
  --burgundy: #6F1028;
  --deep: #3B0614;
  --paper: #F4EBDD;
  --serif: "Cormorant Garamond", Georgia, serif;
  --body: "Libre Baskerville", Georgia, serif;
  --label: "Inter", Arial, sans-serif;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  color: var(--deep);
  background: var(--paper);
  font-family: var(--body);
  overflow-x: hidden;
}

.grain,
.archive-grid,
.spine,
.cursor-glow {
  pointer-events: none;
  position: fixed;
  z-index: 20;
}

.grain {
  inset: 0;
  opacity: .28;
  background-image: radial-gradient(circle at 20% 10%, rgba(95, 90, 85, .11) 0 1px, transparent 1px), radial-gradient(circle at 80% 70%, rgba(59, 6, 20, .08) 0 1px, transparent 1px);
  background-size: 17px 19px, 23px 29px;
  mix-blend-mode: multiply;
}

.archive-grid {
  inset: 0 0 0 50%;
  z-index: 1;
  opacity: .22;
  background-image: linear-gradient(rgba(167, 231, 226, .18) 1px, transparent 1px), linear-gradient(90deg, rgba(167, 231, 226, .18) 1px, transparent 1px);
  background-size: 52px 52px;
}

.spine {
  top: 0;
  left: 50%;
  width: 1px;
  height: 0;
  z-index: 30;
  background: linear-gradient(var(--gold), var(--rose), var(--cyan));
  box-shadow: 0 0 28px rgba(199, 163, 90, .42);
  transition: height 1.8s cubic-bezier(.16, 1, .3, 1);
}

.spine.drawn { height: 100vh; }

.cursor-glow {
  width: 24rem;
  height: 24rem;
  border-radius: 50%;
  left: -12rem;
  top: -12rem;
  z-index: 2;
  background: radial-gradient(circle, rgba(167, 231, 226, .14), transparent 62%);
  transform: translate3d(var(--x, 50vw), var(--y, 50vh), 0);
}

.report-archive { position: relative; z-index: 5; }

.panel {
  min-height: 100vh;
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  position: relative;
  overflow: hidden;
}

.desk-side,
.archive-side {
  min-height: 100vh;
  position: relative;
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: clamp(2rem, 6vw, 6.5rem);
}

.desk-side {
  background: radial-gradient(circle at 25% 25%, rgba(217, 184, 174, .22), transparent 34%), var(--paper);
}

.archive-side {
  color: var(--paper);
  background: radial-gradient(circle at 60% 30%, rgba(111, 16, 40, .75), transparent 30%), radial-gradient(circle at 20% 80%, rgba(167, 231, 226, .12), transparent 30%), linear-gradient(145deg, var(--deep), var(--burgundy));
}

.eyebrow,
.report-label,
.chapter-tab,
.margin-note,
.date-stamp,
.receipt,
.metadata-card span,
.archive-nav a,
.tab-button {
  font-family: var(--label);
  font-size: .72rem;
  font-weight: 600;
  letter-spacing: .16em;
  text-transform: uppercase;
}

h1,
h2,
h3 {
  font-family: var(--serif);
  font-weight: 700;
  margin: 0;
  line-height: .95;
}

h1 { font-size: clamp(4.5rem, 11vw, 10rem); letter-spacing: .035em; }
h2 { font-size: clamp(3rem, 6.5vw, 6rem); }
h3 { font-size: clamp(2rem, 3.2vw, 3.2rem); }

p { font-size: clamp(1rem, 1.35vw, 1.35rem); line-height: 1.9; }

.lede { max-width: 34rem; color: var(--grey); margin-top: 1.4rem; }

.metadata-card {
  width: min(24rem, 80%);
  margin-top: 3rem;
  padding: 1.2rem 1.4rem;
  border: 1px solid rgba(95, 90, 85, .22);
  border-left: 5px solid var(--gold);
  background: rgba(244, 235, 221, .72);
  box-shadow: inset 0 0 25px rgba(217, 184, 174, .18), 0 18px 45px rgba(59, 6, 20, .08);
}

.metadata-card strong,
.metadata-card em { display: block; margin-top: .5rem; }
.metadata-card em { color: var(--grey); }

.binder-clip {
  position: absolute;
  right: 12%;
  top: 18%;
  width: 5.2rem;
  height: 3.4rem;
  border: 2px solid var(--gold);
  border-radius: .35rem .35rem 1.5rem 1.5rem;
  opacity: .66;
  transform: rotate(-8deg);
}

.binder-clip::before,
.binder-clip::after {
  content: "";
  position: absolute;
  top: -1.15rem;
  width: 1.7rem;
  height: 1.7rem;
  border: 2px solid var(--gold);
  border-bottom: 0;
  border-radius: 50% 50% 0 0;
}

.binder-clip::before { left: .45rem; }
.binder-clip::after { right: .45rem; }

.flip-card {
  width: min(34rem, 86%);
  height: 27rem;
  perspective: 1200px;
  cursor: pointer;
  transform: translateX(-7%);
}

.flip-inner {
  width: 100%;
  height: 100%;
  position: relative;
  transform-style: preserve-3d;
  transition: transform 1.05s cubic-bezier(.16, 1, .3, 1);
}

.flip-card.flipped .flip-inner { transform: rotateY(180deg); }

.card-face {
  position: absolute;
  inset: 0;
  backface-visibility: hidden;
  padding: 2.4rem;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  border: 1px solid rgba(199, 163, 90, .38);
  background: linear-gradient(145deg, rgba(244, 235, 221, .97), rgba(217, 184, 174, .88));
  color: var(--deep);
  box-shadow: 0 40px 90px rgba(0, 0, 0, .36), inset 0 0 42px rgba(255, 255, 255, .22);
}

.card-back {
  transform: rotateY(180deg);
  background: linear-gradient(145deg, rgba(59, 6, 20, .96), rgba(111, 16, 40, .94));
  color: var(--paper);
}

.report-label { color: var(--burgundy); }
.report-label.cyan, .cyan { color: var(--cyan); }
.date-stamp { align-self: flex-start; color: var(--gold); border: 1px solid currentColor; padding: .55rem .8rem; transform: rotate(-3deg); }

.glitch-copy { text-shadow: 2px 0 0 rgba(167, 231, 226, .55), -2px 0 0 rgba(217, 184, 174, .35); }

.chapter-tab {
  width: max-content;
  margin-bottom: 2rem;
  padding: .55rem 1rem;
  color: var(--paper);
  background: var(--burgundy);
  border-radius: 999px;
}

.report-panel .desk-side p { max-width: 32rem; color: var(--grey); }
.margin-note, .receipt { margin-top: 3rem; color: var(--gold); }

.layered { align-items: center; }

.paper-sheet {
  width: min(34rem, 88%);
  min-height: 20rem;
  padding: 2.2rem;
  color: var(--deep);
  background: rgba(244, 235, 221, .92);
  border: 1px solid rgba(199, 163, 90, .42);
  box-shadow: 0 35px 80px rgba(0, 0, 0, .28);
  position: relative;
}

.sheet-a { transform: rotate(2deg) translateX(-4%); }
.sheet-a::before {
  content: "";
  position: absolute;
  inset: 1rem;
  border: 1px solid rgba(95, 90, 85, .16);
}

.tab-button {
  position: absolute;
  border: 0;
  color: var(--deep);
  background: var(--gold);
  padding: .8rem 1rem;
  right: 16%;
  top: 28%;
  cursor: pointer;
  transition: transform .35s ease, background .35s ease;
}

.tab-button.second { top: 39%; background: var(--rose); }
.tab-button:hover { transform: translateX(-1rem); background: var(--cyan); }

.snippet-box {
  position: absolute;
  right: 12%;
  bottom: 18%;
  max-width: 18rem;
  padding: 1rem;
  border: 1px solid rgba(167, 231, 226, .45);
  background: rgba(59, 6, 20, .5);
  color: var(--paper);
  font-style: italic;
  line-height: 1.7;
}

.inverted .desk-side { background: linear-gradient(145deg, var(--paper), rgba(217, 184, 174, .35)); }
.crossing-stage { align-items: center; }
.crossing-card { transform: translateX(-18%) rotate(-2deg); }

.binder-ring {
  position: absolute;
  left: -1.15rem;
  width: 2.3rem;
  height: 6rem;
  border: 2px solid var(--gold);
  border-radius: 999px;
  opacity: .55;
}
.ring-one { top: 34%; }
.ring-two { top: 54%; }

.final-stack { align-items: center; }
.seal {
  position: absolute;
  top: 17%;
  right: 19%;
  width: 6rem;
  height: 6rem;
  display: grid;
  place-items: center;
  border-radius: 50%;
  font-family: var(--serif);
  font-size: 4rem;
  color: var(--paper);
  background: var(--burgundy);
  box-shadow: 0 0 0 8px rgba(199, 163, 90, .16);
  transform: rotate(9deg);
}

.final-sheet { transform: translateX(-8%) rotate(-1.5deg); }

.archive-nav {
  display: flex;
  gap: .8rem;
  margin-top: 2rem;
  flex-wrap: wrap;
}

.archive-nav a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(167, 231, 226, .55);
  padding-bottom: .3rem;
}

.panel .desk-side > *, .panel .archive-side > * {
  opacity: 0;
  transform: translateY(2rem);
  transition: opacity .9s ease, transform .9s cubic-bezier(.16, 1, .3, 1);
}

.panel.active .desk-side > *, .panel.active .archive-side > * {
  opacity: 1;
  transform: translateY(0);
}

.panel.active .crossing-card { transform: translateX(-18%) rotate(-2deg); }
.panel.active .sheet-a { transform: rotate(2deg) translateX(-4%); }
.panel.active .final-sheet { transform: translateX(-8%) rotate(-1.5deg); }

@keyframes glitchDrift {
  0%, 100% { filter: hue-rotate(0deg); clip-path: inset(0 0 0 0); }
  45% { filter: hue-rotate(12deg); clip-path: inset(8% 0 12% 0); }
  46% { clip-path: inset(62% 0 7% 0); }
  48% { clip-path: inset(0 0 0 0); }
}

.glitching .glitch-copy { animation: glitchDrift .72s steps(2, end); }

@media (max-width: 820px) {
  .panel { grid-template-columns: 1fr; }
  .desk-side, .archive-side { min-height: 50vh; padding: 2rem; }
  .spine { left: 0; }
  .archive-grid { inset: 50% 0 0 0; }
  h1 { font-size: 4rem; }
  .flip-card, .crossing-card { width: 100%; height: 24rem; transform: none; }
  .tab-button, .snippet-box { position: static; margin-top: 1rem; align-self: flex-start; }
}