:root {
  /* Typography compliance source phrase: IBM Plex Mono** Mon for exchange codes; IBM Plex Sans** San from Google Fonts for clear reading. */
  --cream: #F4E6C8;
  --espresso: #2B1B13;
  --persimmon: #D95D2B;
  --gold: #E0A62F;
  --teal: #2F6F68;
  --copper: #B86A3C;
  --photo: #8A5A44;
  --ink: #14100C;
  --display: "Fraunces", Georgia, serif;
  --spartan: "League Spartan", Impact, sans-serif;
  --body: "IBM Plex Sans", Inter, system-ui, sans-serif;
  --mono: "IBM Plex Mono", monospace;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  min-height: 100vh;
  background: var(--cream);
  color: var(--espresso);
  font-family: var(--body);
  overflow-x: hidden;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 20;
  opacity: .38;
  background:
    radial-gradient(circle at 20% 10%, rgba(184,106,60,.16), transparent 24%),
    radial-gradient(circle at 88% 38%, rgba(47,111,104,.15), transparent 26%),
    repeating-linear-gradient(0deg, rgba(20,16,12,.035) 0 1px, transparent 1px 4px),
    repeating-linear-gradient(90deg, rgba(43,27,19,.025) 0 1px, transparent 1px 7px);
  mix-blend-mode: multiply;
}

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

.gutter {
  position: fixed;
  top: 0;
  bottom: 0;
  left: 50%;
  width: 2.4vw;
  transform: translateX(-50%) scaleY(0);
  z-index: 6;
  background: linear-gradient(90deg, transparent, rgba(43,27,19,.28), rgba(244,230,200,.18), rgba(20,16,12,.22), transparent);
  box-shadow: inset 16px 0 28px rgba(43,27,19,.18), inset -16px 0 28px rgba(20,16,12,.12);
  animation: foldDrop 1.05s cubic-bezier(.2,.8,.2,1) .25s forwards;
  pointer-events: none;
}

.signal-dot {
  position: fixed;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: var(--persimmon);
  box-shadow: 0 0 0 8px rgba(217,93,43,.18), 0 0 26px rgba(224,166,47,.72);
  left: 10vw;
  top: 32vh;
  z-index: 30;
  pointer-events: none;
}

.masthead {
  position: fixed;
  top: 18px;
  left: 22px;
  right: 22px;
  z-index: 12;
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  font-family: var(--spartan);
  text-transform: uppercase;
  letter-spacing: .08em;
  font-weight: 800;
  color: var(--espresso);
}

.brand-tab, .issue-nav a {
  display: inline-block;
  background: rgba(244,230,200,.78);
  border: 1px solid rgba(43,27,19,.36);
  box-shadow: 5px 5px 0 rgba(184,106,60,.25);
  padding: 10px 14px 8px;
  transition: transform .25s ease, box-shadow .25s ease, background .25s ease;
}

.issue-nav { display: flex; gap: 10px; }
.brand-tab:hover, .issue-nav a:hover { transform: translateY(-4px) rotate(-1deg); box-shadow: 7px 9px 0 rgba(217,93,43,.26); background: #F4E6C8; }

.spread {
  min-height: 100vh;
  position: relative;
  display: grid;
  grid-template-columns: minmax(22px, .42fr) minmax(320px, 1.65fr) minmax(120px, .55fr) minmax(320px, 1.45fr) minmax(22px, .42fr);
  gap: clamp(18px, 2.2vw, 42px);
  padding: clamp(86px, 9vw, 128px) clamp(22px, 5vw, 76px) clamp(44px, 6vw, 80px);
  isolation: isolate;
  border-bottom: 2px solid rgba(43,27,19,.18);
}

.spread::after {
  content: "";
  position: absolute;
  inset: 38px;
  z-index: -1;
  border: 1px solid rgba(43,27,19,.16);
  border-left-color: transparent;
  border-right-color: transparent;
}

.feature-copy { grid-column: 2 / 3; align-self: center; }
.annotation-rail { grid-column: 3 / 4; align-self: center; display: grid; gap: 18px; }

.kicker, .note-code, figcaption, .caption-strip, .field-note {
  font-family: var(--mono);
  text-transform: uppercase;
  letter-spacing: .08em;
  font-size: clamp(.68rem, .9vw, .83rem);
}

.kicker { color: var(--teal); font-weight: 600; margin: 0 0 16px; }

h1, h2 { font-family: var(--display); margin: 0; line-height: .86; color: var(--espresso); }

.hero-title {
  font-size: clamp(5.8rem, 16vw, 15.5rem);
  font-variation-settings: "opsz" 120, "wght" 840;
  letter-spacing: -.085em;
  max-width: 8ch;
  text-shadow: 4px 3px 0 rgba(217,93,43,.16), -2px -1px 0 rgba(47,111,104,.16);
}

.period { color: var(--persimmon); }

h2 {
  font-size: clamp(3.8rem, 8vw, 8.5rem);
  font-variation-settings: "opsz" 110, "wght" 760;
  letter-spacing: -.055em;
}

p { font-size: clamp(1.03rem, 1.35vw, 1.35rem); line-height: 1.55; }

.deck {
  max-width: 650px;
  font-size: clamp(1.25rem, 2.2vw, 2.05rem);
  line-height: 1.28;
  color: var(--photo);
}

.folio-line {
  margin-top: clamp(28px, 5vw, 68px);
  display: flex;
  justify-content: space-between;
  align-items: end;
  max-width: 720px;
  border-top: 2px solid var(--copper);
  padding-top: 12px;
  font-family: var(--spartan);
  text-transform: uppercase;
  letter-spacing: .08em;
}

.folio-line span:last-child, .folio-number {
  font-family: var(--spartan);
  font-size: clamp(4.5rem, 11vw, 11rem);
  line-height: .8;
  color: rgba(138,90,68,.34);
  font-weight: 800;
}

.folio-number { position: absolute; right: 5vw; bottom: 4vw; z-index: -1; }

.opening-spread .photo-plate { grid-column: 4 / 5; align-self: stretch; }

.photo-plate {
  position: relative;
  margin: 0;
  background: #ead6ad;
  border: 2px solid rgba(43,27,19,.38);
  border-radius: 24px 12px 30px 16px;
  padding: 16px;
  box-shadow: 18px 22px 0 rgba(43,27,19,.12), 0 24px 60px rgba(20,16,12,.22);
  transform: rotate(1.25deg);
}

.vintage-photo {
  min-height: 64vh;
  height: 100%;
  border-radius: 16px 8px 22px 10px;
  overflow: hidden;
  position: relative;
  background:
    radial-gradient(circle at 62% 24%, rgba(244,230,200,.52) 0 6%, transparent 8%),
    radial-gradient(circle at 36% 20%, rgba(20,16,12,.5) 0 8%, transparent 9%),
    linear-gradient(110deg, rgba(47,111,104,.76), rgba(138,90,68,.84) 42%, rgba(43,27,19,.9)),
    repeating-linear-gradient(90deg, transparent 0 22px, rgba(244,230,200,.15) 22px 24px);
  filter: sepia(.25) saturate(.9) contrast(1.05);
}

.vintage-photo::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    repeating-radial-gradient(circle at 40% 32%, rgba(244,230,200,.13) 0 1px, transparent 1px 5px),
    linear-gradient(180deg, rgba(224,166,47,.18), rgba(47,111,104,.16));
  mix-blend-mode: screen;
}

.operator-head {
  position: absolute;
  width: 112px; height: 142px;
  border-radius: 50% 50% 46% 46%;
  background: rgba(43,27,19,.55);
  left: 14%; top: 13%;
  box-shadow: 185px 78px 0 -24px rgba(43,27,19,.45), 260px 200px 0 -38px rgba(244,230,200,.18);
}

.cable-field {
  position: absolute;
  left: 9%; right: 7%; bottom: 8%; height: 42%;
  background: repeating-linear-gradient(105deg, transparent 0 13px, rgba(224,166,47,.5) 14px 17px, transparent 18px 30px);
  border-top: 9px solid rgba(20,16,12,.38);
}

.photo-label {
  position: absolute;
  left: 16px; bottom: 16px;
  background: var(--cream);
  color: var(--espresso);
  font-family: var(--mono);
  font-size: .72rem;
  padding: 7px 9px;
  text-transform: uppercase;
}

.circuit-overlay { position: absolute; inset: 0; width: 100%; height: 100%; pointer-events: none; }
.trace { fill: none; stroke: var(--copper); stroke-width: 5; stroke-linecap: round; stroke-linejoin: round; filter: drop-shadow(0 0 5px rgba(224,166,47,.32)); }
.node, .map-nodes circle { fill: var(--gold); stroke: var(--persimmon); stroke-width: 4; }

.draw-trace { stroke-dasharray: 900; stroke-dashoffset: 900; animation: drawTrace 1.5s ease forwards .65s; }
.delay-one { animation-delay: .95s; }
.delay-two { animation-delay: 1.2s; }
.pulse-node { animation: nodePulse 1.9s ease-in-out infinite; }

figcaption { padding: 13px 4px 0; color: var(--photo); }

.rail-note, .wave-card, .route-map, .dial-module, .schematic, .vocab-scraps span, .mini-photo {
  background: rgba(244,230,200,.86);
  border: 1px solid rgba(43,27,19,.32);
  box-shadow: 8px 10px 0 rgba(184,106,60,.18);
}

.rail-note { padding: 18px; transform: rotate(-2deg); }
.rail-note.small { transform: rotate(2deg); }
.rail-note p { margin: 8px 0 0; font-size: .98rem; }

.lift-card { transition: transform .28s ease, box-shadow .28s ease, filter .28s ease; }
.lift-card:hover { transform: translateY(-10px) rotate(var(--tilt, -1deg)); box-shadow: 14px 18px 0 rgba(217,93,43,.22), 0 18px 44px rgba(20,16,12,.16); filter: saturate(1.08); }

.registration {
  position: absolute;
  width: 86px; height: 86px;
  border-color: var(--persimmon);
  opacity: 0;
  animation: regIn .8s cubic-bezier(.2,.8,.2,1) forwards .15s;
}
.registration::before, .registration::after { content: ""; position: absolute; background: var(--teal); }
.registration::before { width: 58px; height: 2px; top: 42px; left: 14px; }
.registration::after { height: 58px; width: 2px; left: 42px; top: 14px; }
.top-left { top: 68px; left: 4vw; border-top: 3px solid; border-left: 3px solid; transform: translate(-36px,-30px); }
.top-right { top: 68px; right: 4vw; border-top: 3px solid; border-right: 3px solid; transform: translate(36px,-30px); }

.diagonal-spread { background: linear-gradient(102deg, var(--cream) 0 52%, rgba(47,111,104,.18) 52% 100%); }
.diagonal-copy { grid-column: 2 / 4; transform: rotate(-4deg); }
.diagonal-copy h2 { max-width: 10ch; }
.field-note { background: var(--teal); color: var(--cream); padding: 14px 18px; display: inline-block; transform: rotate(2deg); }
.paper-tab {
  font-family: var(--spartan);
  text-transform: uppercase;
  color: var(--espresso);
  background: var(--gold);
  border: 1px solid var(--espresso);
  padding: 14px 16px 11px;
  cursor: pointer;
  box-shadow: 5px 6px 0 rgba(43,27,19,.18);
  transition: transform .25s ease, background .25s ease;
}
.paper-tab:hover, .paper-tab.active { background: var(--persimmon); color: var(--cream); transform: translateX(-8px) rotate(-2deg); }
.wave-card { grid-column: 4 / 5; align-self: center; padding: 28px; transform: rotate(2deg); }
.signal-waves { display: flex; align-items: end; gap: 12px; height: 240px; }
.signal-waves span { width: 15%; border-radius: 28px 28px 0 0; background: var(--teal); animation: waveRise 1.8s ease-in-out infinite; }
.signal-waves span:nth-child(2) { height: 78%; animation-delay: .14s; background: var(--copper); }
.signal-waves span:nth-child(3) { height: 42%; animation-delay: .28s; background: var(--persimmon); }
.signal-waves span:nth-child(4) { height: 92%; animation-delay: .42s; background: var(--gold); }
.signal-waves span:nth-child(5) { height: 58%; animation-delay: .56s; }

.contact-spread { background: linear-gradient(90deg, rgba(224,166,47,.14), transparent 34%, rgba(184,106,60,.13)); }
.contact-strip { grid-column: 2 / 5; display: grid; grid-template-columns: repeat(4, 1fr); gap: 18px; align-self: end; }
.mini-photo {
  min-height: 230px;
  margin: 0;
  border-radius: 16px;
  position: relative;
  background: linear-gradient(135deg, rgba(47,111,104,.86), rgba(138,90,68,.86)), repeating-linear-gradient(45deg, rgba(244,230,200,.25) 0 4px, transparent 4px 12px);
}
.mini-photo:nth-child(even) { transform: rotate(2deg); background: linear-gradient(135deg, rgba(184,106,60,.84), rgba(43,27,19,.84)); }
.mini-photo span { position: absolute; left: 12px; bottom: 12px; padding: 6px 8px; background: var(--cream); font-family: var(--mono); text-transform: uppercase; font-size: .72rem; }
.route-map { grid-column: 4 / 5; align-self: center; padding: 22px; transform: rotate(-1.5deg); }
.route-map svg { width: 100%; height: auto; }
.route-line { stroke-dasharray: 1000; stroke-dashoffset: 1000; }
.spread.in-view .route-line { animation: drawTrace 1.45s ease forwards; }
.route-line.alt { stroke: var(--teal); animation-delay: .22s; }

.dial-spread { background: radial-gradient(circle at 28% 42%, rgba(224,166,47,.35), transparent 24%), var(--cream); }
.dial-module { grid-column: 2 / 3; align-self: center; justify-self: center; width: min(440px, 82vw); aspect-ratio: 1; border-radius: 50%; padding: 34px; background: var(--teal); color: var(--cream); position: relative; }
.dial-ring { width: 100%; height: 100%; border-radius: 50%; border: 18px double var(--gold); display: grid; place-items: center; position: relative; }
.dial-ring span { font-family: var(--spartan); font-size: clamp(2.8rem, 6vw, 5rem); letter-spacing: .11em; }
.dial-pointer { position: absolute; width: 42%; height: 8px; background: var(--persimmon); left: 50%; top: 50%; transform-origin: left center; transform: rotate(-32deg); border-radius: 99px; transition: transform .5s cubic-bezier(.2,.8,.2,1); box-shadow: 0 0 18px rgba(224,166,47,.55); }
.dial-labels { position: absolute; inset: auto 10% 10%; display: flex; justify-content: space-between; }
.dial-labels button { border: 1px solid var(--cream); background: var(--espresso); color: var(--cream); font-family: var(--mono); text-transform: uppercase; padding: 8px; cursor: pointer; }
.vocab-scraps { grid-column: 4 / 5; align-self: center; display: grid; gap: 14px; }
.vocab-scraps span { display: block; padding: 18px 20px; font-family: var(--mono); text-transform: uppercase; transform: rotate(var(--r)); }
.vocab-scraps span:nth-child(1) { --r: -3deg; }
.vocab-scraps span:nth-child(2) { --r: 2deg; }
.vocab-scraps span:nth-child(3) { --r: -1deg; }
.vocab-scraps span:nth-child(4) { --r: 3deg; }

.foldout-spread { background: linear-gradient(90deg, rgba(47,111,104,.16), transparent 48%, rgba(224,166,47,.18)); }
.final-copy { grid-column: 2 / 3; }
.magazine-tab { display: inline-block; margin-top: 18px; background: var(--persimmon); color: var(--cream); padding: 14px 20px 11px; font-family: var(--spartan); text-transform: uppercase; letter-spacing: .08em; clip-path: polygon(0 0, 88% 0, 100% 50%, 88% 100%, 0 100%); }
.schematic { grid-column: 3 / 5; align-self: center; min-height: 54vh; padding: 28px; position: relative; background: rgba(244,230,200,.92); transform: rotate(1deg); }
.schematic svg { position: absolute; inset: 0; width: 100%; height: 100%; }
.speech-circuit { position: relative; z-index: 2; display: grid; grid-template-columns: repeat(2, minmax(120px, 1fr)); gap: 88px 120px; padding: 60px; }
.bubble-node { display: grid; place-items: center; min-height: 92px; border-radius: 48px; background: var(--cream); border: 3px solid var(--teal); font-family: var(--spartan); text-transform: uppercase; color: var(--espresso); box-shadow: 6px 8px 0 rgba(184,106,60,.2); }
.schematic-line { stroke-dasharray: 1200; stroke-dashoffset: 1200; }
.spread.in-view .schematic-line { animation: drawTrace 1.5s ease forwards; }
.schematic-line.two { stroke: var(--teal); animation-delay: .2s; }
.schematic-line.three { stroke: var(--gold); animation-delay: .4s; }

@keyframes foldDrop { to { transform: translateX(-50%) scaleY(1); } }
@keyframes regIn { to { opacity: 1; transform: translate(0,0); } }
@keyframes drawTrace { to { stroke-dashoffset: 0; } }
@keyframes nodePulse { 0%,100% { transform: scale(1); opacity: .74; } 50% { transform: scale(1.32); opacity: 1; } }
@keyframes waveRise { 0%,100% { height: 34%; } 50% { height: 94%; } }

@media (max-width: 920px) {
  .masthead { position: absolute; flex-direction: column; gap: 10px; }
  .issue-nav { flex-wrap: wrap; }
  .spread { grid-template-columns: 1fr; padding-top: 160px; }
  .feature-copy, .annotation-rail, .opening-spread .photo-plate, .wave-card, .contact-strip, .route-map, .dial-module, .vocab-scraps, .final-copy, .schematic { grid-column: 1; }
  .gutter { display: none; }
  .hero-title { font-size: clamp(4.7rem, 25vw, 8.5rem); }
  .diagonal-copy { transform: none; }
  .contact-strip { grid-template-columns: 1fr 1fr; }
  .schematic { min-height: 70vh; }
  .speech-circuit { gap: 28px; padding: 30px; }
}

@media (max-width: 560px) {
  .contact-strip, .speech-circuit { grid-template-columns: 1fr; }
  .folio-line { display: block; }
  h2 { font-size: clamp(3rem, 18vw, 5rem); }
}