/* Sample 03 — Folio. The brochure as a horizontal book: cream desk, white spreads, a hairline spine. */
:root {
  --mast: 72px;
  --pad: clamp(32px, 4.6vw, 72px);
  --paper: #fbfaf6;
  --ink-soft: #3a4052;
}
html { scroll-behavior: smooth; }
html, body { overflow-x: clip; }
body { background: var(--cream); color: var(--navy); }
main { display: block; }

.h1 { font-family: var(--serif); font-weight: 300; line-height: 1.04; letter-spacing: -0.012em; font-size: clamp(36px, 3.75vw, 58px); }
.h1 em, .display em, .h3 em, .motto em { font-style: italic; color: var(--violet); }
.h3 { font-size: clamp(20px, 1.6vw, 24px); }
.lede { color: var(--ink-soft); }
.num { font-variant-numeric: lining-nums; }
.eyebrow { color: var(--violet); }
p { color: var(--ink-soft); }
.js .rv { opacity: 0; }

/* ---------- Preloader ---------- */
.preload { position: fixed; inset: 0; z-index: 100; background: var(--cream); display: grid; place-items: center; }
.preload__inner { display: flex; flex-direction: column; align-items: center; gap: 26px; }
.preload__rule { width: 120px; height: 1px; background: var(--line); position: relative; overflow: hidden; }
.preload__rule i { position: absolute; inset: 0; background: var(--gold); transform-origin: left; animation: preRule 1.6s var(--ease-in-out) infinite; }
@keyframes preRule { 0% { transform: scaleX(0); transform-origin: left; } 50% { transform: scaleX(1); transform-origin: left; } 51% { transform-origin: right; } 100% { transform: scaleX(0); transform-origin: right; } }
.preload__num { display: flex; flex-direction: column; align-items: center; gap: 10px; }
.preload__num b { font-family: var(--serif); font-weight: 300; font-size: 56px; line-height: 1; color: var(--gold); font-variant-numeric: tabular-nums; }
.preload__num small { font-family: var(--serif); font-size: 18px; color: var(--ink-2); letter-spacing: .02em; }

/* ---------- Masthead ---------- */
.mast { position: fixed; inset: 0 0 auto 0; height: var(--mast); z-index: 40; display: grid; grid-template-columns: 1fr auto 1fr; align-items: center; padding: 0 var(--pad); background: var(--cream); border-bottom: 1px solid var(--line); }
.mast .wordmark { font-size: 16px; }
.mast__folio { display: flex; align-items: baseline; gap: 10px; font-family: var(--serif); font-size: 22px; line-height: 1; color: var(--navy); font-variant-numeric: tabular-nums; }
.mast__folio-num { display: inline-block; overflow: hidden; height: 1em; line-height: 1; }
.mast__folio-num span { display: inline-block; will-change: transform; }
.mast__folio-sep { color: var(--gold); }
.mast__folio-total { color: var(--ink-3); }
.mast__right { display: flex; align-items: center; justify-content: flex-end; gap: 32px; }
.mast__nav { display: flex; gap: 26px; font-size: 12px; letter-spacing: .14em; text-transform: uppercase; color: var(--ink-2); }
.mast__nav a { position: relative; padding: 4px 0; }
.mast__nav a::after { content: ''; position: absolute; left: 0; right: 100%; bottom: 0; height: 1px; background: var(--gold); transition: right .35s var(--ease-out); }
.mast__nav a:hover::after { right: 0; }
.mast__cta { min-height: 42px; padding: 0 22px; font-size: 11px; }

/* ---------- The book ---------- */
.book { position: relative; height: calc(100vh - var(--mast)); margin-top: var(--mast); overflow: hidden; background: var(--cream); }
.book__track { display: flex; height: 100%; width: 600vw; will-change: transform; }
.spread { position: relative; flex: 0 0 100vw; height: 100%; display: grid; grid-template-columns: 1fr 1fr; background: var(--paper); }
.spread + .spread { border-left: 1px solid var(--line); }
.spread::before { content: ''; position: absolute; left: 50%; top: 0; bottom: 0; width: 1px; background: var(--line); z-index: 3; pointer-events: none; }
.spread::after { content: ''; position: absolute; left: 50%; top: 0; bottom: 0; width: 42px; margin-left: -21px; background: linear-gradient(to right, rgba(21,33,58,0), rgba(21,33,58,.05) 50%, rgba(21,33,58,0)); z-index: 2; pointer-events: none; }
.half { position: relative; min-width: 0; display: flex; flex-direction: column; }
.half--text { padding: clamp(36px, 5vh, 56px) var(--pad) 28px; justify-content: center; }
.half__body { display: flex; flex-direction: column; gap: 20px; max-width: 600px; }
.half__body > .h1, .half__body > .display { margin-bottom: 4px; }
.half--media { background: var(--sand-2); overflow: hidden; }
.half--grid { padding: clamp(36px, 5vh, 56px) var(--pad) 28px; justify-content: center; }
.folio { margin-top: auto; padding-top: 22px; display: flex; justify-content: space-between; align-items: baseline; font-size: 11px; letter-spacing: .2em; text-transform: uppercase; color: var(--ink-3); }
.folio__n { font-family: var(--serif); font-size: 18px; letter-spacing: .04em; color: var(--gold); font-variant-numeric: lining-nums; }
.folio--media { position: absolute; left: var(--pad); right: var(--pad); bottom: 28px; margin: 0; padding: 0; justify-content: flex-start; z-index: 4; }
.half:first-child .folio { flex-direction: row-reverse; }
.half:first-child .folio--media { justify-content: flex-start; }
.half:last-child .folio--media { justify-content: flex-end; }
.folio--on-image .folio__n { color: #fff; text-shadow: 0 1px 12px rgba(0,0,0,.35); }
.cols { display: grid; grid-template-columns: 1fr 1fr; gap: 28px; font-size: 15px; line-height: 1.65; }
.actions { display: flex; gap: 12px; flex-wrap: wrap; margin-top: 6px; }
.turn-hint { margin-top: 18px; display: flex; align-items: center; gap: 14px; font-size: 11px; letter-spacing: .22em; text-transform: uppercase; color: var(--ink-3); }
.turn-hint i { width: 56px; height: 1px; background: var(--line); position: relative; overflow: hidden; }
.turn-hint i::after { content: ''; position: absolute; inset: 0; background: var(--gold); animation: hint 2.2s var(--ease-in-out) infinite; }
@keyframes hint { 0% { transform: translateX(-100%); } 60%, 100% { transform: translateX(100%); } }

/* cover */
.spread--cover .display { font-size: clamp(44px, 4.9vw, 74px); }
.half--tower { background: var(--cream); }
#tower { position: absolute; inset: 0; width: 100%; height: 100%; display: block; }
.half__cap { position: absolute; left: var(--pad); right: var(--pad); bottom: 28px; display: flex; justify-content: space-between; font-size: 11px; letter-spacing: .2em; text-transform: uppercase; color: var(--ink-3); margin: 0; }

/* cover contents */
.toc { margin-top: auto; padding-top: 28px; max-width: 600px; }
.toc ol { list-style: none; margin: 12px 0 0; padding: 0; display: grid; grid-template-columns: 1fr 1fr; column-gap: 40px; }
.toc a { display: flex; align-items: baseline; gap: 10px; padding: 7px 0; font-size: 12.5px; letter-spacing: .04em; color: var(--ink-2); transition: color .25s; }
.toc a:hover { color: var(--navy); }
.toc a i { flex: 1; border-bottom: 1px dotted rgba(21,33,58,.35); transform: translateY(-4px); }
.toc a b { font-family: var(--serif); font-weight: 300; font-size: 16px; color: var(--gold); font-variant-numeric: lining-nums; }
.spread--cover .folio { margin-top: 0; }

/* bleed image */
.frame--bleed { position: absolute; inset: 0; }
.frame--bleed img { width: 100%; height: 100%; object-fit: cover; }

/* life: triptych */
.moments { display: grid; grid-template-columns: repeat(3, 1fr); gap: clamp(16px, 2vw, 28px); }
.moment .frame { aspect-ratio: 3 / 4; margin-bottom: 18px; }
.moment:nth-child(2) { margin-top: 44px; }
.moment:nth-child(3) .frame { aspect-ratio: 3 / 3.6; }
.moment h3 { margin-bottom: 10px; padding-bottom: 10px; border-bottom: 1px solid var(--line); }
.moment p { font-size: 13.5px; line-height: 1.6; }
.quote { font-family: var(--serif); font-style: italic; font-size: clamp(24px, 2vw, 30px); color: var(--violet); line-height: 1.2; }
.waiting { border-top: 1px solid var(--gold); padding-top: 18px; display: flex; flex-direction: column; gap: 8px; max-width: 46ch; }
.waiting p { font-size: 14.5px; }

/* why: stats */
.stats { display: grid; grid-template-columns: repeat(4, auto); justify-content: space-between; gap: 20px; margin: 10px 0 0; padding-top: 22px; border-top: 1px solid var(--line); }
.stats div { display: flex; flex-direction: column; gap: 8px; }
.stats dd { margin: 0; white-space: nowrap; font-family: var(--serif); font-size: clamp(32px, 2.7vw, 40px); line-height: 1; color: var(--navy); }
.stats dd span { display: inline-block; }
.stats dt { font-size: 11px; letter-spacing: .18em; text-transform: uppercase; color: var(--ink-3); }

/* amenities */
.schedule { border-collapse: collapse; width: 100%; max-width: 460px; font-size: 15px; }
.schedule caption { text-align: left; padding: 0 0 12px; }
.schedule th, .schedule td { padding: 9px 0; border-top: 1px solid var(--line); text-align: left; font-weight: 300; }
.schedule th { color: var(--ink-2); }
.schedule td { font-family: var(--serif); font-size: 19px; text-align: right; color: var(--navy); font-variant-numeric: lining-nums; }
.schedule tbody tr:last-child th, .schedule tbody tr:last-child td { border-bottom: 1px solid var(--line); }
.tags { display: flex; flex-wrap: wrap; gap: 6px 0; font-size: 11.5px; letter-spacing: .14em; text-transform: uppercase; color: var(--ink-3); max-width: 520px; line-height: 1.7; }
.tags span + span::before { content: '·'; margin: 0 10px; color: var(--gold); }
.rows { display: flex; flex-direction: column; }
.row { display: grid; grid-template-columns: 172px 1fr; gap: 28px; padding: 22px 0; border-top: 1px solid var(--line); align-items: start; }
.row:first-child { border-top: 0; padding-top: 0; }
.row:last-child { padding-bottom: 0; }
.row .frame { aspect-ratio: 4 / 3; }
.row h3 { margin-bottom: 8px; }
.row p { font-size: 13.5px; line-height: 1.6; }

/* finishes */
.finishes { display: flex; flex-direction: column; }
.finish { padding: 18px 0; border-top: 1px solid var(--line); }
.finish:first-child { border-top: 0; padding-top: 0; }
.finish h3 { margin-bottom: 8px; }
.finish p { font-size: 14px; line-height: 1.6; }
.finish--img { display: grid; grid-template-columns: 132px 1fr; gap: 26px; align-items: start; }
.finish--img .frame { aspect-ratio: 1; }

/* upanga: places */
#upanga .h1 { font-size: clamp(34px, 3.3vw, 48px); }
#upanga .half__body { gap: 16px; }
#upanga .half__body > p { font-size: 15px; }
.places { list-style: none; margin: 0; padding: 0; max-width: 520px; }
.places li { display: flex; justify-content: space-between; gap: 20px; padding: 6px 0; border-top: 1px solid var(--line); font-size: 14.5px; }
.places li:last-child { border-bottom: 1px solid var(--line); }
.places li span:last-child { font-size: 11px; letter-spacing: .14em; text-transform: uppercase; color: var(--ink-3); white-space: nowrap; }
.places__head { border-top: 0 !important; padding-top: 0 !important; }
.places__head span:first-child { font-family: var(--serif); font-size: 21px; color: var(--navy); }

/* progress */
.book__progress { position: absolute; left: 0; right: 0; bottom: 0; height: 2px; background: var(--line); z-index: 5; }
.book__progress i { position: absolute; inset: 0; background: var(--gold); transform-origin: left; transform: scaleX(0); }

/* ---------- Vertical sections ---------- */
.sec, .foot, .spread { scroll-margin-top: var(--mast); }
.sec { position: relative; padding: clamp(80px, 10vh, 130px) var(--pad); border-top: 1px solid var(--line); background: var(--cream); }
.sec__head { display: flex; flex-direction: column; gap: 18px; max-width: 900px; margin-bottom: clamp(40px, 6vh, 64px); }
.sec__head--split { display: grid; grid-template-columns: 1.4fr 1fr; gap: 40px; align-items: end; max-width: none; }
.sec__head--split > div { display: flex; flex-direction: column; gap: 18px; }
.sec__head--split > p { max-width: 42ch; justify-self: end; }

/* Residences: the plan viewer */
.viewer { display: grid; grid-template-columns: 300px minmax(0, 1fr) 240px; gap: clamp(32px, 4vw, 64px); align-items: start; }
.tiers { list-style: none; margin: 0; padding: 0; border-top: 1px solid var(--line); }
.tiers button { position: relative; width: 100%; display: grid; grid-template-columns: 78px 1fr; grid-template-rows: auto auto; column-gap: 14px; align-items: baseline; text-align: left; padding: 14px 0 14px 18px; border-bottom: 1px solid var(--line); transition: color .3s; }
.tiers button::before { content: ''; position: absolute; left: 0; top: 14px; bottom: 14px; width: 1px; background: var(--gold); transform: scaleY(0); transform-origin: top; transition: transform .45s var(--ease-out); }
.tiers button b { grid-row: span 2; font-family: var(--serif); font-weight: 300; font-size: 30px; line-height: 1; color: var(--ink-3); transition: color .3s; font-variant-numeric: lining-nums; white-space: nowrap; }
.tiers button span { font-size: 15px; color: var(--ink-2); }
.tiers button small { font-size: 11px; letter-spacing: .14em; text-transform: uppercase; color: var(--ink-3); }
.tiers button:hover b { color: var(--navy); }
.tiers button[aria-selected="true"]::before { transform: scaleY(1); }
.tiers button[aria-selected="true"] b { color: var(--violet); }
.tiers button[aria-selected="true"] span { color: var(--navy); }
.specs { margin-top: 32px; display: flex; flex-direction: column; gap: 16px; }
.specs__tier { display: flex; justify-content: space-between; align-items: baseline; }
.specs__code { font-family: var(--serif); font-size: 26px; color: var(--gold); }
.spec { border-collapse: collapse; width: 100%; font-size: 14px; }
.spec th, .spec td { padding: 9px 0; border-top: 1px solid var(--line); text-align: left; font-weight: 300; }
.spec th { color: var(--ink-2); width: 40%; }
.spec td { font-family: var(--serif); font-size: 18px; color: var(--navy); font-variant-numeric: lining-nums; }
.spec tbody tr:last-child th, .spec tbody tr:last-child td { border-bottom: 1px solid var(--line); }
.specs__cta { align-self: flex-start; margin-top: 6px; min-height: 44px; padding: 0 22px; font-size: 11px; }

.viewer__page { display: flex; flex-direction: column; gap: 14px; }
.page { position: relative; aspect-ratio: 4 / 3; perspective: 2600px; transform-style: preserve-3d; }
.leaf { position: absolute; inset: 0; transform-origin: left center; transform-style: preserve-3d; will-change: transform; }
.leaf__face, .leaf__back { position: absolute; inset: 0; backface-visibility: hidden; background: #fff; border: 1px solid var(--line); }
.leaf__face { display: flex; flex-direction: column; padding: 28px 28px 22px; }
.leaf__face img { flex: 1; min-height: 0; width: 100%; object-fit: contain; }
.leaf__face::after { content: ''; position: absolute; inset: 0; background: linear-gradient(to right, rgba(21,33,58,.28), rgba(21,33,58,0) 40%); opacity: var(--shade, 0); pointer-events: none; }
.leaf__back { transform: rotateY(180deg); background: var(--cream); }
.leaf__back::after { content: ''; position: absolute; inset: 0; background: linear-gradient(to left, rgba(21,33,58,.22), rgba(21,33,58,0) 40%); opacity: var(--shade, 0); }
.leaf__cap { display: flex; gap: 10px; align-items: baseline; margin-top: 16px; padding-top: 12px; border-top: 1px solid var(--line); font-size: 11px; letter-spacing: .18em; text-transform: uppercase; color: var(--ink-3); }
.leaf__cap b { font-family: var(--serif); font-weight: 300; font-size: 20px; letter-spacing: 0; text-transform: none; color: var(--gold); }
.leaf.is-turning { z-index: 5; }
.viewer__note { font-size: 12px; letter-spacing: .04em; color: var(--ink-3); }

.viewer__tower-sticky { position: sticky; top: calc(var(--mast) + 24px); display: flex; flex-direction: column; gap: 12px; }
#tower-small { display: block; width: 100%; height: 440px; }
.viewer__floors { display: flex; flex-direction: column; gap: 6px; border-top: 1px solid var(--line); padding-top: 14px; }
.viewer__floors b { font-family: var(--serif); font-weight: 300; font-size: 34px; line-height: 1; color: var(--navy); }

/* Walk-through */
.sec--tour { background: var(--paper); }
.tour__intro { color: var(--ink-2); }
.tour { position: relative; border: 1px solid var(--line); background: var(--sand-2); }
#tour-canvas { display: block; width: 100%; height: min(72vh, 760px); cursor: grab; }
#tour-canvas:active { cursor: grabbing; }
.tour__labels { position: absolute; inset: 0; pointer-events: none; overflow: hidden; }
.tour__labels span { position: absolute; left: 0; top: 0; white-space: nowrap; font-size: 10.5px; letter-spacing: .12em; text-transform: uppercase; color: var(--navy); background: rgba(251,250,246,.94); border: 1px solid var(--line); padding: 5px 8px; line-height: 1.25; display: flex; flex-direction: column; gap: 2px; transition: opacity .2s; }
.tour__labels span i { font-style: normal; color: var(--ink-3); letter-spacing: .04em; }
.tour__plans { position: absolute; left: 0; top: 0; display: flex; z-index: 2; border-bottom: 1px solid var(--line); border-right: 1px solid var(--line); background: rgba(251,250,246,.9); backdrop-filter: blur(6px); }
.tour__plans button { display: flex; flex-direction: column; gap: 2px; padding: 14px 18px; border-right: 1px solid var(--line); text-align: left; color: var(--ink-3); transition: color .25s, background .25s; }
.tour__plans button:last-child { border-right: 0; }
.tour__plans button b { font-family: var(--serif); font-weight: 300; font-size: 24px; line-height: 1; }
.tour__plans button span { font-size: 10.5px; letter-spacing: .1em; text-transform: uppercase; }
.tour__plans button:hover { color: var(--navy); }
.tour__plans button.is-active { color: var(--navy); background: #fff; }
.tour__plans button.is-active b { color: var(--violet); }
.tour__rooms { position: absolute; left: 0; right: 0; bottom: 0; display: flex; flex-wrap: wrap; z-index: 2; border-top: 1px solid var(--line); background: rgba(251,250,246,.9); backdrop-filter: blur(6px); }
.tour__rooms button { font-size: 11px; letter-spacing: .14em; text-transform: uppercase; color: var(--ink-2); padding: 14px 18px; border-right: 1px solid var(--line); transition: color .25s, background .25s; }
.tour__rooms button:hover { color: var(--navy); }
.tour__rooms button.is-active { color: var(--navy); background: #fff; box-shadow: inset 0 2px 0 var(--gold); }
.tour__folio { position: absolute; right: 24px; top: 20px; z-index: 2; }

/* Developer */
.dev { display: grid; grid-template-columns: minmax(0, 5fr) minmax(0, 7fr); gap: clamp(40px, 6vw, 96px); align-items: start; }
.dev__photo { position: sticky; top: calc(var(--mast) + 40px); display: flex; flex-direction: column; gap: 12px; }
.dev__photo .frame { aspect-ratio: 4 / 3.3; }
.dev__caption { color: var(--ink-3); }
.dev__text { display: flex; flex-direction: column; gap: 22px; }
.dev__years { display: flex; align-items: baseline; gap: 12px; font-family: var(--serif); font-size: clamp(96px, 11vw, 168px); line-height: .85; color: var(--gold); margin: -6px 0 -4px; }
.dev__years small { font-family: var(--sans); font-size: 12px; letter-spacing: .22em; text-transform: uppercase; color: var(--ink-3); }
.dev__meta { margin: 6px 0 0; display: flex; flex-direction: column; }
.dev__meta div { display: grid; grid-template-columns: 220px 1fr; gap: 20px; padding: 12px 0; border-top: 1px solid var(--line); font-size: 14px; }
.dev__meta div:last-child { border-bottom: 1px solid var(--line); }
.dev__meta dt { font-size: 11px; letter-spacing: .16em; text-transform: uppercase; color: var(--ink-3); padding-top: 3px; }
.dev__meta dd { margin: 0; color: var(--navy); }
.motto { font-family: var(--serif); font-size: clamp(26px, 2.4vw, 36px); line-height: 1.15; color: var(--navy); margin-top: 8px; }

/* Process */
.steps { list-style: none; margin: 0; padding: 0; display: grid; grid-template-columns: repeat(4, 1fr); gap: 32px; border-top: 1px solid var(--line); }
.steps li { display: flex; flex-direction: column; gap: 10px; padding-top: 22px; }
.steps__n { font-family: var(--serif); font-size: 44px; line-height: 1; color: var(--gold); }
.steps strong { font-family: var(--serif); font-weight: 400; font-size: 24px; color: var(--navy); }
.steps p { font-size: 14.5px; }
.steps a { color: var(--navy); border-bottom: 1px solid var(--line); }

/* Close */
.sec--close { background: var(--paper); }
.close { display: grid; grid-template-columns: minmax(0, 7fr) minmax(0, 5fr); gap: clamp(48px, 7vw, 120px); align-items: start; }
.close__text { display: flex; flex-direction: column; gap: 22px; }
.close__text .display { font-size: clamp(44px, 5.4vw, 82px); }
.close__lines { list-style: none; padding: 0; margin: 0; font-family: var(--serif); font-size: clamp(19px, 1.6vw, 23px); line-height: 1.55; color: var(--navy); }
.note { display: grid; grid-template-columns: auto 1fr; gap: 20px; align-items: start; padding: 20px 0; border-top: 1px solid var(--gold); border-bottom: 1px solid var(--line); max-width: 58ch; font-size: 15px; }
.note .num { font-family: var(--serif); font-size: 52px; line-height: .9; color: var(--gold); }
.contact { display: flex; gap: 26px; flex-wrap: wrap; font-size: 13px; letter-spacing: .06em; }
.contact a { color: var(--navy); border-bottom: 1px solid var(--line); padding-bottom: 2px; }
.form { display: flex; flex-direction: column; gap: 22px; padding: 32px; border: 1px solid var(--line); background: #fff; }
.form__row { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }
.form label { display: flex; flex-direction: column; gap: 8px; font-size: 11px; letter-spacing: .18em; text-transform: uppercase; color: var(--ink-2); }
.form input[type="text"], .form input[type="email"], .form input[type="tel"] { font: 300 16px var(--sans); color: var(--navy); background: transparent; border: 0; border-bottom: 1px solid var(--ink-3); border-radius: 0; padding: 8px 0; outline: none; transition: border-color .2s; }
.form input:focus { border-bottom-color: var(--violet); }
.form fieldset { border: 0; margin: 0; padding: 0; display: flex; gap: 8px; flex-wrap: wrap; }
.form legend { padding: 0; margin-bottom: 12px; font-size: 11px; letter-spacing: .18em; text-transform: uppercase; color: var(--ink-2); }
.chip { position: relative; }
.chip input { position: absolute; opacity: 0; inset: 0; }
.chip span { display: inline-block; padding: 9px 16px; border: 1px solid var(--line); border-radius: 999px; font-size: 13px; cursor: pointer; transition: all .25s; }
.chip input:checked + span { background: var(--navy); color: #fff; border-color: var(--navy); }
.form__actions { display: flex; gap: 10px; flex-wrap: wrap; }
.form__done { color: var(--violet); font-family: var(--serif); font-size: 22px; }
.form.is-sent > :not(.form__done) { display: none; }

/* Footer */
.foot { padding: 36px var(--pad) 48px; border-top: 1px solid var(--line); display: flex; flex-direction: column; gap: 18px; color: var(--ink-3); }
.foot__row { display: grid; grid-template-columns: 1fr auto 1fr; align-items: center; gap: 24px; }
.foot__row .wordmark { color: var(--navy); font-size: 14px; }
.foot__tag { font-family: var(--serif); font-size: 17px; color: var(--ink-2); text-align: center; }
.foot__row .folio__n { justify-self: end; }
.foot > p { max-width: 80ch; }

/* ---------- Stacked fallback (narrow screens / reduced motion) ---------- */
@media (max-width: 1000px) {
  :root { --mast: 60px; }
  .mast { grid-template-columns: 1fr auto; padding: 0 20px; }
  .mast__right { display: none; }
  .mast__folio { grid-column: 2; font-size: 18px; }
  .book { height: auto; overflow: visible; }
  .book__track { display: block; width: auto; height: auto; }
  .spread { flex: none; width: auto; height: auto; grid-template-columns: 1fr; border-left: 0 !important; border-top: 1px solid var(--line); }
  .spread::before, .spread::after { display: none; }
  .half--media { height: 62vw; min-height: 240px; order: -1; }
  .half--text, .half--grid { padding: 36px 20px 24px; }
  .half__body { gap: 16px; }
  .cols, .moments, .stats { grid-template-columns: 1fr; }
  .moment:nth-child(2) { margin-top: 0; }
  .moment .frame, .moment:nth-child(3) .frame { aspect-ratio: 16 / 10; }
  .row, .finish--img { grid-template-columns: 96px 1fr; gap: 16px; }
  .stats { grid-template-columns: 1fr 1fr; }
  .half--tower { height: 70vw; min-height: 320px; }
  .half__cap { display: none; }
  .book__progress, .folio, .toc { display: none; }
  .folio--media { left: 20px; right: 20px; bottom: 16px; }
  .sec { padding: 64px 20px; }
  .sec__head--split { grid-template-columns: 1fr; }
  .sec__head--split > p { justify-self: start; }
  .viewer { grid-template-columns: 1fr; }
  .viewer__tower { display: none; }
  .tiers button { grid-template-columns: 64px 1fr; }
  .tiers button b { font-size: 24px; }
  .page { aspect-ratio: 4 / 3; }
  .leaf__face { padding: 14px; }
  #tour-canvas { height: 60vh; }
  .tour__plans { position: static; border-right: 0; }
  .tour__plans button { flex: 1; padding: 10px 12px; }
  .tour__rooms { position: static; }
  .tour__folio { display: none; }
  .dev, .close { grid-template-columns: 1fr; }
  .dev__photo { position: static; }
  .dev__meta div { grid-template-columns: 1fr; gap: 4px; }
  .steps { grid-template-columns: 1fr; gap: 0; }
  .steps li { border-bottom: 1px solid var(--line); padding-bottom: 22px; }
  .form { padding: 20px; }
  .form__row { grid-template-columns: 1fr; }
  .foot__row { grid-template-columns: 1fr auto; }
  .foot__tag { display: none; }
}
@media (prefers-reduced-motion: reduce) {
  .book { height: auto; overflow: visible; }
  .book__track { display: block; width: auto; height: auto; }
  .spread { flex: none; width: auto; min-height: calc(100vh - var(--mast)); }
  .half--tower { min-height: 60vh; }
  .book__progress, .turn-hint, .toc { display: none; }
  .js .rv { opacity: 1; }
}