/* ============================================================
   THE AGE FIVE GATE TRILOGY
   Visual language borrowed from the hardback jackets:
   midnight navy, brass caps, one blade of warm light.
   ============================================================ */

:root {
  --night: #05080f;
  --navy: #0a1324;
  --navy-2: #0e1b31;
  --navy-3: #13253f;
  --navy-line: #1e3557;

  --brass: #deb183;
  --brass-2: #c2924f;
  --gold: #fbe3bc;
  --bone: #f1e9db;
  --slate: #93a2b8;
  --slate-dim: #64748f;
  --ember: #c05336;

  --display: "Cinzel", "Trajan Pro", Georgia, serif;
  --body: "Spectral", Georgia, "Times New Roman", serif;
  --mono: "IBM Plex Mono", ui-monospace, "SFMono-Regular", monospace;

  --gut: clamp(1.25rem, 5vw, 5.5rem);
  --rule: 1px solid var(--navy-line);
  --ease: cubic-bezier(0.22, 0.61, 0.36, 1);
  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
}

*, *::before, *::after { box-sizing: border-box; }

html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  background: var(--night);
  color: var(--bone);
  font-family: var(--body);
  font-weight: 300;
  font-size: clamp(1rem, 0.62vw + 0.86rem, 1.14rem);
  line-height: 1.72;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

img { max-width: 100%; display: block; }
a { color: inherit; }

::selection { background: var(--brass); color: var(--night); }

:focus-visible {
  outline: 2px solid var(--brass);
  outline-offset: 3px;
  border-radius: 2px;
}

/* ---------- atmosphere: fixed grain + vignette ---------- */

.atmos {
  position: fixed;
  inset: 0;
  z-index: 60;
  pointer-events: none;
}
.atmos::before {
  content: "";
  position: absolute;
  inset: -50%;
  opacity: 0.045;
  background-image: url("data:image/svg+xml;utf8,%3Csvg xmlns='http://www.w3.org/2000/svg' width='160' height='160'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.82' numOctaves='3'/%3E%3C/filter%3E%3Crect width='160' height='160' filter='url(%23n)'/%3E%3C/svg%3E");
  animation: grain 7s steps(6) infinite;
}
.atmos::after {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(120% 80% at 50% 45%, transparent 38%, rgba(3, 5, 11, 0.62) 100%);
}
@keyframes grain {
  0%, 100% { transform: translate3d(0, 0, 0); }
  20% { transform: translate3d(-3%, 2%, 0); }
  40% { transform: translate3d(2%, -3%, 0); }
  60% { transform: translate3d(-2%, -2%, 0); }
  80% { transform: translate3d(3%, 1%, 0); }
}

/* ---------- typography primitives ---------- */

.eyebrow {
  font-family: var(--mono);
  font-size: clamp(0.6rem, 0.4vw + 0.52rem, 0.72rem);
  font-weight: 500;
  letter-spacing: 0.3em;
  text-transform: uppercase;
  color: var(--brass-2);
  margin: 0;
}

.caps {
  font-family: var(--display);
  text-transform: uppercase;
  letter-spacing: 0.02em;
  line-height: 0.98;
  font-weight: 700;
  margin: 0;
  text-wrap: balance;
}

h2.caps { font-size: clamp(1.95rem, 4.1vw, 4.1rem); }
h3.caps { font-size: clamp(1.4rem, 2.1vw, 2.15rem); letter-spacing: 0.04em; }

.lyric {
  font-family: var(--body);
  font-style: italic;
  font-weight: 300;
  color: var(--brass);
  line-height: 1.34;
  text-wrap: pretty;
}

.hair {
  border: 0;
  height: 1px;
  background: linear-gradient(90deg, var(--brass-2), rgba(194, 146, 79, 0.05));
  margin: 0;
}

.mono-note {
  font-family: var(--mono);
  font-size: 0.71rem;
  line-height: 1.85;
  letter-spacing: 0.06em;
  color: var(--slate-dim);
  text-transform: uppercase;
}

/* ---------- shell ---------- */

.wrap {
  width: min(1320px, 100% - var(--gut) * 2);
  margin-inline: auto;
}
.wrap--tight { width: min(880px, 100% - var(--gut) * 2); }

section { position: relative; }
section[id] { scroll-margin-top: 4.75rem; }

.band { padding-block: clamp(4.5rem, 11vh, 10rem); }

/* ---------- top bar ---------- */

.topbar {
  position: fixed;
  inset: 0 0 auto 0;
  z-index: 50;
  display: flex;
  align-items: center;
  gap: 1.5rem;
  padding: 0.85rem var(--gut);
  background: linear-gradient(180deg, rgba(5, 8, 15, 0.92), rgba(5, 8, 15, 0));
  transition: background 0.4s var(--ease), border-color 0.4s var(--ease);
  border-bottom: 1px solid transparent;
}
.topbar[data-stuck="true"] {
  background: rgba(7, 12, 22, 0.94);
  backdrop-filter: blur(14px);
  border-bottom-color: var(--navy-line);
}
.topbar__mark {
  font-family: var(--display);
  font-size: 0.8rem;
  letter-spacing: 0.24em;
  text-transform: uppercase;
  text-decoration: none;
  color: var(--bone);
  font-weight: 600;
}
.topbar__mark span { color: var(--brass-2); }
.topbar__spacer { flex: 1; }
.topbar__links {
  display: flex;
  gap: 1.6rem;
  font-family: var(--mono);
  font-size: 0.66rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
}
.topbar__links a {
  color: var(--slate);
  text-decoration: none;
  transition: color 0.25s var(--ease);
}
.topbar__links a:hover { color: var(--brass); }
@media (max-width: 860px) { .topbar__links { display: none; } }

.progress {
  position: fixed;
  top: 0;
  left: 0;
  height: 2px;
  width: 100%;
  z-index: 55;
  transform-origin: 0 50%;
  transform: scaleX(0);
  background: linear-gradient(90deg, var(--brass-2), var(--gold));
}

/* ---------- buttons ---------- */

.btn {
  --bg: var(--brass);
  --fg: #10192b;
  position: relative;
  display: inline-flex;
  align-items: center;
  gap: 0.7rem;
  padding: 0.95rem 1.7rem;
  font-family: var(--mono);
  font-size: 0.7rem;
  font-weight: 500;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  text-decoration: none;
  color: var(--fg);
  background: var(--bg);
  border: 1px solid var(--bg);
  overflow: hidden;
  transition: transform 0.35s var(--ease-out), box-shadow 0.35s var(--ease);
  box-shadow: 0 0 0 rgba(222, 177, 131, 0);
}
.btn::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(100deg, transparent 20%, rgba(255, 255, 255, 0.55), transparent 80%);
  transform: translateX(-120%);
  transition: transform 0.7s var(--ease);
}
.btn:hover { transform: translateY(-2px); box-shadow: 0 14px 40px -18px rgba(222, 177, 131, 0.75); }
.btn:hover::after { transform: translateX(120%); }
.btn:active { transform: translateY(0); }
.btn--ghost {
  --bg: transparent;
  --fg: var(--bone);
  border-color: var(--navy-line);
}
.btn--ghost:hover { border-color: var(--brass-2); color: var(--brass); box-shadow: none; }
.btn__arrow { font-family: var(--body); font-size: 1rem; line-height: 1; }

/* ---------- reveal choreography ---------- */

/* Hairline grids (1px gap over a lit background) fade as one block, otherwise
   the gap colour flashes as a solid slab while the children are still at zero. */
.reveal-self {
  opacity: 0;
  transform: translateY(26px);
  transition: opacity 0.9s var(--ease-out), transform 0.9s var(--ease-out);
}
.reveal-self.is-in { opacity: 1; transform: none; }

.reveal > * {
  opacity: 0;
  transform: translateY(26px);
  transition: opacity 0.9s var(--ease-out), transform 0.9s var(--ease-out);
  transition-delay: calc(var(--i, 0) * 90ms);
}
.reveal.is-in > * { opacity: 1; transform: none; }
.reveal[data-stagger="slow"] > * { transition-delay: calc(var(--i, 0) * 170ms); }

/* ============================================================
   HERO
   ============================================================ */

.hero {
  position: relative;
  min-height: 100svh;
  display: grid;
  align-content: end;
  padding-block: clamp(7rem, 16vh, 11rem) clamp(2rem, 5vh, 4rem);
  isolation: isolate;
  overflow: hidden;
}
.hero__bg {
  position: absolute;
  inset: 0;
  z-index: -2;
}
.hero__bg img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: 50% 58%;
  opacity: 0.5;
  animation: drift 32s var(--ease) infinite alternate;
}
@keyframes drift {
  from { transform: scale(1.06) translate3d(0, 0, 0); }
  to { transform: scale(1.16) translate3d(-1.4%, -1.8%, 0); }
}
.hero__bg::after {
  content: "";
  position: absolute;
  inset: 0;
  background:
    linear-gradient(180deg, rgba(5, 8, 15, 0.86) 0%, rgba(5, 8, 15, 0.42) 38%, rgba(5, 8, 15, 0.94) 88%),
    linear-gradient(90deg, rgba(5, 8, 15, 0.9) 0%, rgba(5, 8, 15, 0.1) 62%);
}

.hero__grid {
  display: grid;
  grid-template-columns: minmax(0, 1.42fr) minmax(0, 1fr);
  gap: clamp(1.5rem, 4vw, 4rem);
  align-items: end;
}
@media (max-width: 980px) { .hero__grid { grid-template-columns: 1fr; } }

.hero h1 {
  font-family: var(--display);
  text-transform: uppercase;
  font-weight: 900;
  font-size: clamp(2.3rem, 7.1vw, 6.4rem);
  line-height: 0.92;
  letter-spacing: -0.005em;
  margin: 1.4rem 0 0;
  text-wrap: balance;
}
.hero__sub {
  font-size: clamp(1.3rem, 3vw, 2.5rem);
  margin: 1.25rem 0 0;
  max-width: 30ch;
}
.hero__lede {
  color: var(--slate);
  max-width: 48ch;
  margin: 1.5rem 0 0;
  font-size: 1rem;
}
.hero__lede b { color: var(--bone); font-weight: 500; }
.hero__cta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.85rem;
  margin-top: 2.2rem;
}

/* the big numeral with a blade of light through it */
.glyph {
  position: relative;
  justify-self: end;
  align-self: end;
  line-height: 0.8;
  padding-bottom: 0.4rem;
}
@media (max-width: 980px) { .glyph { display: none; } }
.glyph__five {
  font-family: var(--display);
  font-weight: 900;
  font-size: clamp(11rem, 23vw, 22rem);
  color: transparent;
  -webkit-text-stroke: 1px rgba(222, 177, 131, 0.42);
  display: block;
}
.glyph__blade {
  position: absolute;
  top: -6%;
  bottom: -6%;
  left: 50%;
  width: 2px;
  background: linear-gradient(180deg, transparent, var(--gold) 18%, var(--brass) 70%, transparent);
  box-shadow: 0 0 22px 3px rgba(251, 227, 188, 0.45);
  transform-origin: 50% 0;
  animation: blade 2.4s var(--ease-out) 0.5s both;
}
@keyframes blade {
  from { transform: scaleY(0); opacity: 0; }
  55% { opacity: 1; }
  to { transform: scaleY(1); opacity: 1; }
}
.glyph__label {
  position: absolute;
  left: 50%;
  bottom: -1.6rem;
  transform: translateX(-50%);
  white-space: nowrap;
}

.hero__rail {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem 2.4rem;
  margin-top: clamp(2.5rem, 6vh, 4.5rem);
  padding-top: 1.1rem;
  border-top: var(--rule);
}
.hero__rail span { display: inline-flex; align-items: center; gap: 0.6rem; }
.hero__rail span::before {
  content: "";
  width: 5px;
  height: 5px;
  background: var(--brass-2);
  transform: rotate(45deg);
}

/* ============================================================
   THE GATE — interactive timeline
   ============================================================ */

.gate { background: linear-gradient(180deg, var(--night), var(--navy) 55%, var(--night)); }

.gate__head {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  gap: clamp(1.5rem, 4vw, 4rem);
  align-items: end;
  margin-bottom: clamp(3rem, 8vh, 5.5rem);
}
@media (max-width: 860px) { .gate__head { grid-template-columns: 1fr; } }
.gate__head p { margin: 0.9rem 0 0; color: var(--slate); }

.ruler {
  position: relative;
  padding: clamp(3.2rem, 8vw, 5rem) 0 clamp(6rem, 12vw, 8.5rem);
}
.ruler__track {
  position: relative;
  height: 2px;
  background: linear-gradient(90deg, var(--navy-line), var(--navy-3));
}
.ruler__lit {
  position: absolute;
  inset: 0 auto 0 0;
  width: 27.8%;
  background: linear-gradient(90deg, rgba(147, 162, 184, 0.35), var(--slate));
  transform-origin: 0 50%;
  transform: scaleX(var(--p, 0));
}
.ruler__late {
  position: absolute;
  inset: 0 0 0 27.8%;
  background: linear-gradient(90deg, var(--brass-2), var(--gold));
  transform-origin: 0 50%;
  transform: scaleX(var(--q, 0));
}
.ruler__tick {
  position: absolute;
  top: -6px;
  left: var(--at);
  width: 1px;
  height: 14px;
  background: var(--navy-line);
}
.ruler__tick b {
  position: absolute;
  top: 20px;
  left: 50%;
  transform: translateX(-50%);
  font-family: var(--mono);
  font-size: 0.62rem;
  font-weight: 400;
  color: var(--slate-dim);
}

.ruler__gate {
  position: absolute;
  left: 27.8%;
  top: calc(-1 * clamp(2.6rem, 6vw, 4rem));
  bottom: calc(-1 * clamp(2.6rem, 6vw, 4rem));
  width: 1px;
  background: var(--bone);
  opacity: 0.85;
}
.ruler__gate::before,
.ruler__gate::after {
  content: "";
  position: absolute;
  left: -3px;
  width: 7px;
  height: 7px;
  background: var(--bone);
  transform: rotate(45deg);
}
.ruler__gate::before { top: -3px; }
.ruler__gate::after { bottom: -3px; }
.ruler__gate-label {
  position: absolute;
  left: 27.8%;
  bottom: calc(-1 * clamp(3.6rem, 7.4vw, 5rem));
  transform: translateX(-50%);
  text-align: center;
  white-space: nowrap;
}
.ruler__gate-label strong {
  display: block;
  font-family: var(--display);
  font-size: 0.82rem;
  letter-spacing: 0.22em;
  color: var(--bone);
  font-weight: 700;
}
.ruler__gate-label span {
  font-family: var(--mono);
  font-size: 0.6rem;
  letter-spacing: 0.16em;
  color: var(--slate-dim);
  text-transform: uppercase;
}

.mark {
  position: absolute;
  left: var(--at);
  top: 1px;
  transform: translate(-50%, -50%);
  width: 2.7rem;
  height: 2.7rem;
  display: grid;
  place-items: center;
  border-radius: 50%;
  border: 1px solid var(--navy-line);
  background: rgba(10, 19, 36, 0.9);
  color: var(--slate);
  font-family: var(--mono);
  font-size: 0.72rem;
  font-weight: 500;
  cursor: pointer;
  transition: border-color 0.3s var(--ease), color 0.3s var(--ease),
    background 0.3s var(--ease), box-shadow 0.4s var(--ease), transform 0.3s var(--ease-out);
}
.mark:hover { border-color: var(--brass-2); color: var(--brass); transform: translate(-50%, -50%) scale(1.08); }
.mark[aria-pressed="true"] {
  border-color: var(--brass);
  background: var(--brass);
  color: #10192b;
  box-shadow: 0 0 0 6px rgba(222, 177, 131, 0.12), 0 0 30px rgba(251, 227, 188, 0.4);
}

.gate__panel {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: clamp(1.2rem, 3vw, 2.6rem);
  align-items: start;
  padding: clamp(1.6rem, 4vw, 2.6rem);
  border: var(--rule);
  border-left: 2px solid var(--brass);
  background: linear-gradient(120deg, rgba(19, 37, 63, 0.55), rgba(10, 19, 36, 0.2));
  min-height: 11rem;
}
@media (max-width: 700px) { .gate__panel { grid-template-columns: 1fr; } }
.gate__age {
  font-family: var(--display);
  font-weight: 900;
  font-size: clamp(2.6rem, 6vw, 4.4rem);
  line-height: 0.82;
  color: var(--brass);
}
.gate__age small {
  display: block;
  font-family: var(--mono);
  font-size: 0.58rem;
  letter-spacing: 0.2em;
  color: var(--slate-dim);
  margin-top: 0.7rem;
  font-weight: 400;
}
.gate__copy h3 {
  font-family: var(--display);
  text-transform: uppercase;
  letter-spacing: 0.12em;
  font-size: 0.92rem;
  margin: 0 0 0.7rem;
  color: var(--bone);
}
.gate__copy p { margin: 0; color: var(--slate); }
.gate__copy p b { color: var(--bone); font-weight: 500; }
.is-swapping .gate__copy, .is-swapping .gate__age { animation: swap 0.5s var(--ease-out); }
@keyframes swap {
  from { opacity: 0; transform: translateY(10px); }
  to { opacity: 1; transform: none; }
}

/* ============================================================
   HYPOTHESIS
   ============================================================ */

.axioms {
  display: grid;
  grid-template-columns: repeat(12, 1fr);
  gap: 1px;
  margin-top: clamp(2.5rem, 6vh, 4rem);
  background: var(--navy-line);
  border: var(--rule);
}
.axiom {
  grid-column: span 6;
  padding: clamp(1.6rem, 3.4vw, 2.8rem);
  background: var(--night);
  position: relative;
  transition: background 0.5s var(--ease);
}
.axiom:nth-child(1), .axiom:nth-child(4) { grid-column: span 7; }
.axiom:nth-child(2), .axiom:nth-child(3) { grid-column: span 5; }
@media (max-width: 800px) { .axiom, .axiom:nth-child(n) { grid-column: span 12; } }
.axiom:hover { background: var(--navy-2); }
.axiom__n {
  font-family: var(--mono);
  font-size: 0.62rem;
  letter-spacing: 0.24em;
  color: var(--brass-2);
}
.axiom h3 {
  font-family: var(--display);
  text-transform: uppercase;
  font-size: clamp(1.1rem, 2vw, 1.65rem);
  letter-spacing: 0.03em;
  line-height: 1.12;
  margin: 1rem 0 0.8rem;
  font-weight: 700;
}
.axiom h3 s { text-decoration-color: var(--ember); text-decoration-thickness: 2px; color: var(--slate-dim); }
.axiom p { margin: 0; color: var(--slate); font-size: 0.97rem; }

.algo {
  margin-top: clamp(2.5rem, 6vh, 4rem);
  padding: clamp(1.8rem, 4vw, 3rem);
  border: 1px solid var(--brass-2);
  background: radial-gradient(120% 160% at 0% 0%, rgba(194, 146, 79, 0.11), transparent 60%);
}
.algo p {
  margin: 0;
  font-size: clamp(1.2rem, 2.5vw, 2rem);
  line-height: 1.34;
  font-style: italic;
  font-weight: 300;
  text-wrap: pretty;
}
.algo p b { font-style: normal; font-weight: 500; color: var(--brass); }

/* ============================================================
   VOLUMES
   ============================================================ */

.vol {
  display: grid;
  grid-template-columns: minmax(0, 0.85fr) minmax(0, 1.15fr);
  gap: clamp(2rem, 6vw, 5.5rem);
  align-items: start;
  padding-block: clamp(3.5rem, 9vh, 7rem);
  border-top: var(--rule);
}
.vol:nth-of-type(even) { grid-template-columns: minmax(0, 1.15fr) minmax(0, 0.85fr); }
.vol:nth-of-type(even) .vol__art { order: 2; }
@media (max-width: 900px) {
  .vol, .vol:nth-of-type(even) { grid-template-columns: 1fr; }
  .vol:nth-of-type(even) .vol__art { order: 0; }
}

.vol__art { position: sticky; top: 6rem; }
@media (max-width: 900px) { .vol__art { position: static; max-width: 22rem; } }

.jacket {
  position: relative;
  aspect-ratio: 798 / 1021;
  background: var(--navy-2);
  box-shadow:
    0 2px 0 rgba(255, 255, 255, 0.06) inset,
    28px 34px 80px -28px rgba(0, 0, 0, 0.9),
    0 0 0 1px rgba(222, 177, 131, 0.14);
  transform: perspective(1400px) rotateY(3.2deg);
  transition: transform 0.8s var(--ease-out), box-shadow 0.8s var(--ease);
  overflow: hidden;
}
.vol:nth-of-type(even) .jacket { transform: perspective(1400px) rotateY(-3.2deg); }
.jacket:hover,
.vol:nth-of-type(even) .jacket:hover {
  transform: perspective(1400px) rotateY(0) translateY(-6px);
  box-shadow: 40px 44px 100px -30px rgba(0, 0, 0, 0.95), 0 0 0 1px rgba(222, 177, 131, 0.3);
}
.jacket img { width: 100%; height: 100%; object-fit: cover; }
/* spine light + glare */
.jacket::before {
  content: "";
  position: absolute;
  inset: 0 auto 0 0;
  width: 14px;
  background: linear-gradient(90deg, rgba(0, 0, 0, 0.6), rgba(255, 255, 255, 0.08), rgba(0, 0, 0, 0.25));
  z-index: 3;
}
.jacket::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(115deg, transparent 42%, rgba(255, 255, 255, 0.09) 50%, transparent 58%);
  z-index: 4;
}
.jacket[data-loading="true"] img { opacity: 0; }
.jacket[data-loading="true"]::before { z-index: 5; }
.skeleton {
  position: absolute;
  inset: 0;
  z-index: 2;
  background:
    linear-gradient(100deg, var(--navy-2) 30%, var(--navy-3) 50%, var(--navy-2) 70%);
  background-size: 300% 100%;
  animation: shimmer 1.6s linear infinite;
  transition: opacity 0.6s var(--ease);
}
.jacket[data-loading="false"] .skeleton { opacity: 0; pointer-events: none; }
@keyframes shimmer {
  from { background-position: 150% 0; }
  to { background-position: -150% 0; }
}

/* Volume One jacket is set in live type over the original gate plate */
.jacket--set { display: grid; container-type: inline-size; }
.jacket--set .jacket__plate {
  position: absolute;
  inset: 0;
  z-index: 1;
}
.jacket--set .jacket__plate img { opacity: 0.85; }
.jacket--set .jacket__plate::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(8, 17, 33, 0.94) 0%, rgba(8, 17, 33, 0.45) 46%, rgba(8, 17, 33, 0.9) 100%);
}
.jacket__type {
  position: relative;
  z-index: 2;
  display: grid;
  align-content: start;
  gap: 0.55rem;
  padding: 7.5% 8% 8%;
  text-align: center;
}
.jacket__kicker {
  font-family: var(--body);
  font-style: italic;
  font-size: 2.45cqw;
  color: var(--brass);
  margin: 0;
}
.jacket__title {
  font-family: var(--display);
  text-transform: uppercase;
  font-weight: 700;
  font-size: 8cqw;
  line-height: 0.96;
  letter-spacing: 0.005em;
  margin: 0.5rem 0 0;
  color: #e7bd8e;
}
.jacket__band {
  font-family: var(--mono);
  font-size: 2.2cqw;
  letter-spacing: 0.22em;
  color: var(--brass);
  text-transform: uppercase;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  justify-content: center;
  margin-top: 0.9rem;
}
.jacket__band::before, .jacket__band::after {
  content: "";
  height: 1px;
  flex: 1;
  background: var(--brass-2);
  opacity: 0.6;
}
.jacket__sub {
  font-family: var(--body);
  font-style: italic;
  font-size: 3.15cqw;
  line-height: 1.3;
  color: var(--bone);
  margin: 0.2rem 0 0;
}
.jacket__series {
  font-family: var(--mono);
  font-size: 2.3cqw;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--brass);
  margin: 0.55rem 0 0;
}
.jacket__authors {
  position: absolute;
  z-index: 2;
  left: 8%;
  right: 8%;
  bottom: 6%;
  font-family: var(--body);
  font-size: 2.95cqw;
  line-height: 1.4;
  text-align: center;
  color: var(--bone);
  margin: 0;
}
.jacket__stamp {
  position: absolute;
  z-index: 2;
  left: 50%;
  bottom: 16.5%;
  transform: translateX(-50%);
  font-family: var(--mono);
  font-size: 2.1cqw;
  letter-spacing: 0.3em;
  color: rgba(241, 233, 219, 0.5);
  text-transform: uppercase;
  border: 1px solid rgba(222, 177, 131, 0.35);
  padding: 0.5em 0.9em;
  white-space: nowrap;
}

.vol__meta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem 1.4rem;
  margin-bottom: 1.3rem;
}
.vol__num {
  font-family: var(--display);
  font-weight: 900;
  font-size: clamp(2.6rem, 6vw, 4.6rem);
  line-height: 0.8;
  color: transparent;
  -webkit-text-stroke: 1px var(--brass-2);
  margin: 0 0 0.3rem;
}
.vol h3.caps { margin-top: 0.4rem; }
.vol__tag {
  font-family: var(--body);
  font-style: italic;
  font-size: clamp(1.05rem, 1.8vw, 1.42rem);
  color: var(--brass);
  margin: 0.9rem 0 0;
  text-wrap: pretty;
}
.vol__body { margin-top: 1.4rem; color: var(--slate); }
.vol__body p { margin: 0 0 1.1rem; }
.vol__body strong { color: var(--bone); font-weight: 500; }

.pills { display: flex; flex-wrap: wrap; gap: 0.5rem; margin-top: 1.6rem; }
.pill {
  font-family: var(--mono);
  font-size: 0.62rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--slate);
  border: var(--rule);
  padding: 0.5rem 0.8rem;
}
.pill--hot { color: var(--brass); border-color: var(--brass-2); }

details.note {
  margin-top: 1.7rem;
  border-top: var(--rule);
  border-bottom: var(--rule);
  padding: 0.2rem 0;
}
details.note summary {
  cursor: pointer;
  list-style: none;
  padding: 1rem 0;
  font-family: var(--mono);
  font-size: 0.66rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--brass-2);
  display: flex;
  align-items: center;
  gap: 0.8rem;
  transition: color 0.3s var(--ease);
}
details.note summary::-webkit-details-marker { display: none; }
details.note summary:hover { color: var(--brass); }
details.note summary::after {
  content: "+";
  margin-left: auto;
  font-size: 1.1rem;
  line-height: 1;
  transition: transform 0.35s var(--ease-out);
}
details.note[open] summary::after { transform: rotate(45deg); }
details.note .note__body { padding-bottom: 1.4rem; color: var(--slate); }
details.note .note__body p { margin: 0 0 1.05rem; }
details.note .note__body p:last-child { margin-bottom: 0; }
details.note .note__body em { color: var(--brass); font-style: italic; }

/* ============================================================
   WHAT-IF INTERLUDE
   ============================================================ */

.whatif {
  position: relative;
  padding-block: clamp(5rem, 14vh, 11rem);
  overflow: hidden;
  isolation: isolate;
  border-top: var(--rule);
}
.whatif__bg { position: absolute; inset: 0; z-index: -2; }
.whatif__bg img {
  width: 100%; height: 100%; object-fit: cover;
  object-position: 50% 30%;
  opacity: 0.34;
}
.whatif__bg::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, var(--night) 0%, rgba(5, 8, 15, 0.55) 42%, var(--night) 100%);
}
.whatif ol {
  list-style: none;
  counter-reset: w;
  margin: clamp(2rem, 5vh, 3.5rem) 0 0;
  padding: 0;
}
.whatif li {
  counter-increment: w;
  position: relative;
  padding: clamp(1.4rem, 3vw, 2.2rem) 0 clamp(1.4rem, 3vw, 2.2rem) clamp(2.6rem, 6vw, 5rem);
  border-top: var(--rule);
  font-size: clamp(1.15rem, 2.45vw, 2.05rem);
  line-height: 1.32;
  font-weight: 300;
  text-wrap: pretty;
}
.whatif li::before {
  content: "0" counter(w);
  position: absolute;
  left: 0;
  top: clamp(1.9rem, 3.6vw, 2.9rem);
  font-family: var(--mono);
  font-size: 0.66rem;
  letter-spacing: 0.16em;
  color: var(--brass-2);
}
.whatif li b { font-weight: 500; color: var(--brass); }
.whatif li i { font-style: italic; color: var(--bone); }
.whatif__close {
  margin-top: clamp(2.2rem, 5vh, 3.5rem);
  font-size: clamp(1.25rem, 2.8vw, 2.3rem);
}

/* ============================================================
   SPEC SHEET — rules + constructs
   ============================================================ */

.spec { background: var(--navy); border-block: var(--rule); }
.spec__grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 17rem), 1fr));
  gap: 1px;
  background: var(--navy-line);
  border: var(--rule);
  margin-top: clamp(2rem, 5vh, 3rem);
}
.rulecard {
  background: var(--navy);
  padding: clamp(1.5rem, 3vw, 2.2rem);
  display: grid;
  gap: 0.8rem;
  align-content: start;
}
.rulecard__n {
  font-family: var(--mono);
  font-size: 0.6rem;
  letter-spacing: 0.24em;
  color: var(--brass-2);
}
.rulecard h3 {
  font-family: var(--display);
  text-transform: uppercase;
  font-size: 0.95rem;
  letter-spacing: 0.08em;
  line-height: 1.3;
  margin: 0;
}
.rulecard p { margin: 0; color: var(--slate); font-size: 0.94rem; }
.rulecard .say, .rulecard .dont {
  font-family: var(--mono);
  font-size: 0.68rem;
  letter-spacing: 0.06em;
  text-transform: none;
  display: flex;
  gap: 0.6rem;
  line-height: 1.6;
}
.rulecard .say { color: var(--brass); }
.rulecard .dont { color: var(--slate-dim); }
.rulecard .say::before { content: "SAY"; color: var(--brass-2); flex: none; }
.rulecard .dont::before { content: "NOT"; color: var(--ember); flex: none; }

.constructs {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 13rem), 1fr));
  gap: clamp(0.8rem, 2vw, 1.4rem);
  margin-top: clamp(2.5rem, 6vh, 3.5rem);
}
.construct {
  border: var(--rule);
  border-top: 2px solid var(--brass-2);
  padding: 1.3rem 1.2rem;
  background: var(--navy-2);
}
.construct b {
  display: block;
  font-family: var(--display);
  text-transform: uppercase;
  font-size: 0.8rem;
  letter-spacing: 0.1em;
  line-height: 1.35;
  margin-bottom: 0.6rem;
}
.construct span { font-family: var(--mono); font-size: 0.64rem; color: var(--slate-dim); letter-spacing: 0.08em; }

.engine {
  margin-top: clamp(2rem, 5vh, 3rem);
  padding-left: 1.4rem;
  border-left: 2px solid var(--ember);
  color: var(--slate);
  font-style: italic;
}

/* door triptych */
.doors {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 16rem), 1fr));
  gap: 1px;
  background: var(--navy-line);
  border: var(--rule);
  margin-top: clamp(2.5rem, 6vh, 4rem);
}
.door {
  background: var(--night);
  padding: clamp(1.6rem, 3.2vw, 2.4rem);
  position: relative;
  overflow: hidden;
}
.door__verb {
  font-family: var(--display);
  text-transform: uppercase;
  font-size: clamp(1.3rem, 2.6vw, 2rem);
  letter-spacing: 0.06em;
  margin: 0 0 0.9rem;
  color: var(--slate-dim);
}
.door p { margin: 0; color: var(--slate); font-size: 0.97rem; }
.door--stay { background: linear-gradient(160deg, rgba(194, 146, 79, 0.14), transparent 70%); }
.door--stay .door__verb { color: var(--brass); }
.door--stay p { color: var(--bone); }

/* ============================================================
   KID LINE
   ============================================================ */

.kidline {
  position: relative;
  text-align: center;
  padding-block: clamp(5.5rem, 16vh, 12rem);
  background: var(--night);
  border-top: var(--rule);
  isolation: isolate;
  overflow: hidden;
}
.kidline__bg { position: absolute; inset: 0; z-index: -2; }
.kidline__bg img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: 50% 38%;
  opacity: 0.42;
}
.kidline__bg::after {
  content: "";
  position: absolute;
  inset: 0;
  background:
    radial-gradient(58% 54% at 50% 46%, rgba(5, 8, 15, 0.42), rgba(5, 8, 15, 0.88) 78%),
    linear-gradient(180deg, var(--night), rgba(5, 8, 15, 0.3) 45%, var(--night));
}
.kidline blockquote {
  margin: 1.8rem auto 0;
  font-family: var(--display);
  text-transform: uppercase;
  font-weight: 700;
  font-size: clamp(1.8rem, 6.4vw, 5rem);
  line-height: 1.02;
  letter-spacing: 0.01em;
  max-width: 24ch;
}
.kidline blockquote em {
  font-style: normal;
  display: block;
  color: var(--brass);
}
.kidline .mono-note { max-width: 56ch; margin: 2.4rem auto 0; text-transform: none; letter-spacing: 0.04em; }

/* ============================================================
   CADENCE
   ============================================================ */

.cadence { padding-block: clamp(3.5rem, 9vh, 6rem); border-top: var(--rule); }
.cadence__beats {
  display: grid;
  gap: clamp(1.2rem, 3vh, 2rem);
  text-align: center;
}
.cadence__beats p {
  margin: 0;
  font-family: var(--display);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  font-size: clamp(1.05rem, 3.2vw, 2.1rem);
}
.cadence__beats p:nth-child(1) { color: var(--slate-dim); }
.cadence__beats p:nth-child(2) { color: var(--bone); letter-spacing: 0.16em; }
.cadence__beats p:nth-child(2) span { color: var(--brass); }
.cadence__beats p:nth-child(3) { color: var(--brass); }

.marquee {
  margin-top: clamp(3rem, 7vh, 5rem);
  border-block: var(--rule);
  padding-block: 0.9rem;
  overflow: hidden;
  -webkit-mask-image: linear-gradient(90deg, transparent, #000 8%, #000 92%, transparent);
  mask-image: linear-gradient(90deg, transparent, #000 8%, #000 92%, transparent);
}
.marquee__row { display: flex; width: max-content; animation: slide 38s linear infinite; }
.marquee__row span {
  font-family: var(--mono);
  font-size: 0.68rem;
  letter-spacing: 0.26em;
  text-transform: uppercase;
  color: var(--slate-dim);
  padding-inline: 1.6rem;
  white-space: nowrap;
}
.marquee__row span b { color: var(--brass-2); font-weight: 500; }
.marquee:hover .marquee__row { animation-play-state: paused; }
@keyframes slide { to { transform: translateX(-50%); } }

/* ============================================================
   SHARE LINES
   ============================================================ */

.share__grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 19rem), 1fr));
  gap: 1px;
  background: var(--navy-line);
  border: var(--rule);
  margin-top: clamp(2rem, 5vh, 3rem);
}
.quote {
  background: var(--night);
  padding: clamp(1.6rem, 3.2vw, 2.4rem);
  display: grid;
  grid-template-rows: 1fr auto;
  gap: 1.5rem;
}
.quote p {
  margin: 0;
  font-size: clamp(1.05rem, 1.9vw, 1.3rem);
  line-height: 1.42;
  font-style: italic;
}
.copy {
  justify-self: start;
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  background: none;
  border: var(--rule);
  color: var(--slate);
  font-family: var(--mono);
  font-size: 0.62rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  padding: 0.6rem 0.9rem;
  cursor: pointer;
  transition: color 0.25s var(--ease), border-color 0.25s var(--ease);
}
.copy:hover { color: var(--brass); border-color: var(--brass-2); }
.copy[data-state="done"] { color: var(--brass); border-color: var(--brass); }
.copy[data-state="error"] { color: var(--ember); border-color: var(--ember); }
.copy svg { width: 12px; height: 12px; flex: none; }

/* ============================================================
   ORDER
   ============================================================ */

.order {
  border-top: var(--rule);
  background:
    radial-gradient(90% 120% at 82% 10%, rgba(194, 146, 79, 0.16), transparent 62%),
    var(--navy);
}
.order__grid {
  display: grid;
  grid-template-columns: minmax(0, 1.25fr) minmax(0, 1fr);
  gap: clamp(2.2rem, 6vw, 5rem);
  align-items: center;
}
@media (max-width: 900px) { .order__grid { grid-template-columns: 1fr; } }
.order h2.caps { font-size: clamp(1.9rem, 4.6vw, 4rem); }
.order__lede { color: var(--slate); margin: 1.2rem 0 0; max-width: 46ch; }
.order__lede b { color: var(--bone); font-weight: 500; }
.order__cta { display: flex; flex-wrap: wrap; gap: 0.85rem; margin-top: 2rem; }
.order__price {
  display: flex;
  align-items: center;
  gap: clamp(0.9rem, 2vw, 1.4rem);
  width: fit-content;
  max-width: 100%;
  margin-top: 2.2rem;
  padding: 0.95rem 1.4rem;
  border: 1px solid var(--brass-2);
  background:
    linear-gradient(120deg, rgba(194, 146, 79, 0.16), transparent 70%),
    var(--navy-2);
}
.order__price-amt {
  font-family: var(--display);
  text-transform: uppercase;
  font-size: clamp(2rem, 4.4vw, 2.9rem);
  line-height: 1;
  color: var(--gold);
}
.order__price-copy { display: grid; gap: 0.3rem; }
.order__price-lede {
  font-family: var(--mono);
  font-size: 0.72rem;
  font-weight: 500;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--bone);
}
.order__price-sub {
  font-family: var(--mono);
  font-size: 0.66rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--slate-dim);
}
@media (max-width: 520px) {
  .order__price { gap: 0.9rem; padding: 0.85rem 1rem; }
  .order__price-sub { letter-spacing: 0.04em; }
}
.order__for {
  display: grid;
  gap: 0.15rem;
  margin-top: 2.4rem;
  padding-top: 1.4rem;
  border-top: var(--rule);
}
.order__for span { font-family: var(--mono); font-size: 0.68rem; letter-spacing: 0.1em; color: var(--slate); }
.order__for span::before { content: "— "; color: var(--brass-2); }

.stack { position: relative; display: grid; }
.stack img {
  grid-area: 1 / 1;
  width: 52%;
  box-shadow: 24px 30px 70px -26px rgba(0, 0, 0, 0.92), 0 0 0 1px rgba(222, 177, 131, 0.16);
  transition: transform 0.7s var(--ease-out);
}
.stack img:nth-child(1) { transform: translate(0, 6%) rotate(-7deg); }
.stack img:nth-child(2) { transform: translate(46%, 0) rotate(-1deg); z-index: 2; }
.stack img:nth-child(3) { transform: translate(92%, 5%) rotate(6deg); }
.stack:hover img:nth-child(1) { transform: translate(-5%, 4%) rotate(-10deg); }
.stack:hover img:nth-child(2) { transform: translate(46%, -4%) rotate(0deg); }
.stack:hover img:nth-child(3) { transform: translate(97%, 3%) rotate(9deg); }

/* ============================================================
   AUTHORS + FOOTER
   ============================================================ */

.authors { border-top: var(--rule); }
.authors__grid {
  display: grid;
  grid-template-columns: minmax(0, 0.72fr) minmax(0, 1.28fr);
  gap: clamp(2rem, 6vw, 5rem);
  align-items: start;
}
@media (max-width: 860px) { .authors__grid { grid-template-columns: 1fr; } }
.authors__portrait {
  position: relative;
  border: 1px solid var(--navy-line);
  padding: 0.6rem;
  background: var(--navy-2);
}
.authors__portrait img { filter: saturate(0.92) contrast(1.04); }
.authors__names { display: grid; gap: 1.6rem; margin-top: 1.6rem; }
.authors__names div { border-left: 2px solid var(--brass-2); padding-left: 1.1rem; }
.authors__names b {
  display: block;
  font-family: var(--display);
  text-transform: uppercase;
  font-size: 0.95rem;
  letter-spacing: 0.08em;
  line-height: 1.4;
}
.authors__names span { font-family: var(--mono); font-size: 0.66rem; letter-spacing: 0.12em; color: var(--slate-dim); }
.authors p { color: var(--slate); }

footer {
  border-top: var(--rule);
  padding-block: clamp(2.5rem, 6vh, 4rem);
  background: var(--night);
}
.foot {
  display: flex;
  flex-wrap: wrap;
  gap: 1.4rem 2.5rem;
  align-items: baseline;
  justify-content: space-between;
}
.foot a { color: var(--slate); text-decoration: none; border-bottom: 1px solid var(--navy-line); }
.foot a:hover { color: var(--brass); border-bottom-color: var(--brass-2); }
.foot__legal { max-width: 62ch; }

/* ---------- motion preferences ---------- */

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
  }
  .reveal > *, .reveal-self { opacity: 1; transform: none; }
  .glyph__blade { transform: scaleY(1); opacity: 1; }
}

/* ============================================================
   PLATES
   Printed-style diagram panels. The source artwork already
   carries the jacket palette, so the frame is only a hairline
   plus a mono caption; nothing is tinted or overlaid.
   ============================================================ */

.plate {
  /* The supplied artwork is 1168px wide; never ask the Image CDN to upscale it. */
  max-width: 1168px;
  margin: clamp(2.5rem, 6vh, 4rem) auto 0;
  border: var(--rule);
  background: var(--navy);
}
.plate__img {
  position: relative;
  aspect-ratio: 1168 / 784;
  overflow: hidden;
  border-bottom: var(--rule);
}
.plate__img img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.plate figcaption {
  display: grid;
  gap: 0.5rem;
  padding: clamp(1rem, 2.4vw, 1.5rem) clamp(1.1rem, 2.6vw, 1.9rem);
}
.plate__label {
  font-family: var(--mono);
  font-size: 0.62rem;
  letter-spacing: 0.24em;
  text-transform: uppercase;
  color: var(--brass-2);
  margin: 0;
}
.plate__note {
  margin: 0;
  color: var(--slate);
  font-size: 0.97rem;
  text-wrap: pretty;
}
.plate__note b { font-weight: 500; color: var(--brass); }

/* Text equivalent for the diagrams, which carry real copy in the artwork. */
.plate__transcript {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip-path: inset(50%);
  white-space: nowrap;
  border: 0;
}

/* Arrow between protocol stages: Cinzel has no glyph for it, so it falls back
   to the body serif — the same treatment the cadence beats already use. */
.caps .arrow { color: var(--brass); }