/* ==========================================================================
   PLUME — design tokens
   Spec: docs/superpowers/specs/2026-10-05-vape-showcase-design.md §4
   ========================================================================== */

:root {
  /* palette — one accent only; ember red is a product swatch, never UI */
  --bg: #0A0A0B;
  --surface: #131315;
  --text: #F3F0EA;
  --muted: #8B887F;
  --line: rgba(243, 240, 234, .14);
  --accent: #E8B84B;
  --ember: #D9482B; /* product colourway only */

  /* type */
  --font-display: 'Instrument Serif', 'Times New Roman', serif;
  --font-body: 'Space Grotesk', 'Helvetica Neue', Arial, sans-serif;
  --font-mono: 'JetBrains Mono', 'SFMono-Regular', Consolas, monospace;

  /* display scale */
  --display: clamp(3rem, 11vw, 11rem);
  --display-sm: clamp(2.4rem, 5.2vw, 4.6rem);

  /* stacking — decided in the pre-flight scan */
  --z-grain: 40;
  --z-hud: 50;
  --z-drawer: 60;
  --z-checkout: 70;
  --z-gate: 90;

  --gutter: clamp(1.25rem, 5vw, 5rem);
  --section-pad: clamp(4.5rem, 12vh, 9rem);
}

/* ==========================================================================
   Base
   ========================================================================== */

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

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: auto;
  /* keeps the layout still when body.is-locked removes the scrollbar */
  scrollbar-gutter: stable;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-body);
  font-size: 1rem;
  line-height: 1.6;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

body.is-gated { overflow: hidden; height: 100vh; }

[hidden] { display: none !important; }

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

h1, h2, h3, p, dl, dd, dt, ul { margin: 0; }

::selection { background: var(--accent); color: var(--bg); }

.mono {
  font-family: var(--font-mono);
  font-size: .72rem;
  letter-spacing: .14em;
  text-transform: uppercase;
}

.display,
.hero__word,
.section-title,
.order__title,
.gate__q {
  font-family: var(--font-display);
  font-weight: 400;
  line-height: .92;
  letter-spacing: -.02em;
}

.section-title { font-size: var(--display-sm); }

.section-sub,
.chapter__desc,
.craft__body,
.order__sub,
.manifesto__body {
  color: var(--muted);
  max-width: 46ch;
}

/* ==========================================================================
   Buttons
   ========================================================================== */

.btn {
  font-family: var(--font-mono);
  font-size: .72rem;
  letter-spacing: .14em;
  text-transform: uppercase;
  padding: .95rem 1.7rem;
  border: 1px solid var(--line);
  background: transparent;
  color: var(--text);
  cursor: pointer;
  transition: border-color .3s ease, background-color .3s ease, color .3s ease;
}

.btn--solid {
  background: var(--accent);
  border-color: var(--accent);
  color: var(--bg);
}

.btn--solid:hover { background: transparent; color: var(--accent); }
.btn--ghost:hover { border-color: var(--text); }
.btn:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; }

/* ==========================================================================
   Age gate  (spec §6)
   ========================================================================== */

.gate {
  position: fixed;
  inset: 0;
  z-index: var(--z-gate);
  background: var(--bg);
  display: grid;
  place-items: center;
  padding: 2rem;
  text-align: center;
}

.gate.is-leaving {
  opacity: 0;
  pointer-events: none;
  transition: opacity .6s ease;
}

.gate__panel { max-width: 40rem; }

.gate__brand {
  color: var(--muted);
  letter-spacing: .42em;
  margin: 0 0 3rem;
}

.gate__q {
  font-family: var(--font-display);
  font-weight: 400;
  font-size: clamp(2.4rem, 7vw, 5rem);
  line-height: .92;
  letter-spacing: -.02em;
  margin: 0 0 1.25rem;
}

.gate__sub { color: var(--muted); margin: 0 0 2.5rem; }

.gate__actions { display: flex; gap: 1rem; justify-content: center; flex-wrap: wrap; }

/* ==========================================================================
   Grain
   ========================================================================== */

.grain {
  position: fixed;
  inset: 0;
  z-index: var(--z-grain);
  pointer-events: none;
  opacity: .17;
  mix-blend-mode: overlay;
  background-image: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='160' height='160'><filter id='n'><feTurbulence type='fractalNoise' baseFrequency='.9' numOctaves='3' stitchTiles='stitch'/></filter><rect width='160' height='160' filter='url(%23n)'/></svg>");
  background-size: 160px 160px;
}

/* ==========================================================================
   HUD
   ========================================================================== */

.hud {
  position: fixed;
  inset: 0 0 auto;
  z-index: var(--z-hud);
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: 1.5rem;
  padding: 1.1rem var(--gutter);
  background: rgba(10, 10, 11, .72);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--line);
}

.hud__brand {
  font-family: var(--font-display);
  font-size: 1.5rem;
  letter-spacing: .04em;
  color: var(--text);
  text-decoration: none;
}

.hud__section {
  justify-self: center;
  font-family: var(--font-mono);
  font-size: .68rem;
  letter-spacing: .24em;
  text-transform: uppercase;
  color: var(--muted);
}

.hud__right { display: flex; align-items: center; gap: 1.25rem; }

.hud__marker { color: var(--muted); }

.hud__cart {
  font-family: var(--font-mono);
  font-size: .68rem;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--text);
  background: transparent;
  border: 1px solid var(--line);
  padding: .55rem .95rem;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: .5rem;
  transition: border-color .3s ease, color .3s ease;
}

.hud__cart:hover { border-color: var(--accent); color: var(--accent); }

.hud__count {
  min-width: 1.35rem;
  padding: .1rem .3rem;
  background: var(--accent);
  color: var(--bg);
  text-align: center;
}

/* ==========================================================================
   Sections & markers
   ========================================================================== */

main { position: relative; }

section { position: relative; }

#manifesto,
#chapter-one,
#chapter-arc,
#chapter-reserve,
#range,
#craft,
#order {
  padding: var(--section-pad) var(--gutter);
  border-top: 1px solid var(--line);
}

.marker {
  position: absolute;
  top: 1.5rem;
  left: var(--gutter);
  color: var(--muted);
}

/* ==========================================================================
   Hero
   ========================================================================== */

#hero {
  min-height: 100svh;
  display: grid;
  grid-template-columns: 1.05fr .95fr;
  align-items: center;
  gap: clamp(1.5rem, 4vw, 4rem);
  padding: clamp(6rem, 14vh, 9rem) var(--gutter) clamp(3rem, 8vh, 6rem);
  overflow: hidden;
}

.hero__media {
  grid-column: 2;
  position: relative;
}

.hero__media img {
  width: 100%;
  height: clamp(22rem, 68vh, 46rem);
  object-fit: cover;
  filter: saturate(.9) contrast(1.05);
}

.hero__copy { grid-column: 1; grid-row: 1; }

.hero__eyebrow { color: var(--muted); margin-bottom: 1.75rem; }

.hero__word {
  font-size: var(--display);
  margin: 0;
}

.hero__tag {
  font-family: var(--font-display);
  font-style: italic;
  font-size: clamp(1.5rem, 3vw, 2.6rem);
  color: var(--accent);
  margin-top: .5rem;
}

.hero__sub {
  color: var(--muted);
  margin-top: 1.5rem;
  max-width: 34ch;
}

.hero__cue {
  position: absolute;
  bottom: 2rem;
  left: var(--gutter);
  color: var(--muted);
}

.hero__cue::after {
  content: '';
  display: inline-block;
  width: 1px;
  height: 2.5rem;
  background: var(--line);
  margin-left: .85rem;
  vertical-align: middle;
}

/* ==========================================================================
   Manifesto
   ========================================================================== */

#manifesto {
  min-height: 90svh;
  display: grid;
  align-content: center;
  overflow: hidden;
}

.manifesto__plate {
  position: absolute;
  inset: -12% 0;
  width: 100%;
  height: 124%;
  object-fit: cover;
  opacity: .32;
  /* Body copy sits directly on this photograph, so the plate must be dark
     enough that `--muted` clears 4.5:1 against its brightest plume: measured
     worst case without this filter is 1.60:1, with it 5.08:1. A computed-style
     contrast sweep cannot catch this class of bug — it has no backdrop. */
  filter: brightness(.35);
  z-index: -1;
}

.manifesto__copy { max-width: 62rem; margin-inline: auto; }

.manifesto__line {
  font-family: var(--font-display);
  font-size: clamp(1.9rem, 4.6vw, 4rem);
  line-height: 1.06;
  letter-spacing: -.02em;
}

.manifesto__line + .manifesto__line { margin-top: .35rem; }

.manifesto__body { margin-top: 2.5rem; }

/* ==========================================================================
   Chapters
   ========================================================================== */

.chapter {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  gap: clamp(2rem, 5vw, 5rem);
  align-items: start;
}

/* Spec §4: ScrollTrigger owns pinning; Lenis only interpolates scroll. Native
   `position: sticky` is deliberately NOT used here — it is what spec §7 warns
   about ("Lenis and native sticky can fight"). JS adds `.is-pinned` only when
   a pin is actually active (>=768px, motion allowed), so without JS or under
   reduced motion the chapter is an ordinary block in normal flow. */
.chapter.is-pinned {
  height: 100vh;
  overflow: hidden;
}

.chapter__media {
  display: grid;
  gap: 1rem;
  align-content: start;
}

.chapter__hero {
  width: 100%;
  height: clamp(18rem, 52vh, 34rem);
  object-fit: cover;
}

/* Inside a pin frame the whole media column must fit 100vh, or the tail is
   clipped. Section padding (2 x 12vh) + hero (52vh) + detail (24vh) + a 16px
   gap came to h + 16px — always 16px too tall. The detail therefore takes only
   what is left in the frame budget, which is self-correcting if the other
   clamps ever change. If the budget went negative this resolves to an invalid
   height and falls back to auto rather than clipping. */
.chapter__detail {
  width: 68%;
  height: min(
    clamp(9rem, 20vh, 16rem),
    calc(100vh - 2 * var(--section-pad) - clamp(18rem, 52vh, 34rem) - 1rem)
  );
  object-fit: cover;
  justify-self: end;
}

/* merged: `will-change` and the frame's top offset were two separate rules */
.chapter__copy {
  padding-top: clamp(1rem, 4vh, 3rem);
  will-change: transform;
}

.chapter__index { color: var(--accent); }

.chapter__name {
  font-family: var(--font-display);
  font-weight: 400;
  font-size: var(--display-sm);
  line-height: .94;
  letter-spacing: -.02em;
  margin-top: .75rem;
}

.chapter__tag {
  font-family: var(--font-display);
  font-style: italic;
  font-size: clamp(1.15rem, 2vw, 1.6rem);
  color: var(--muted);
  margin-top: .5rem;
}

.chapter__price {
  font-family: var(--font-mono);
  font-size: clamp(1.5rem, 3vw, 2.2rem);
  color: var(--accent);
  margin-top: 1.5rem;
}

.chapter__desc { margin-top: 1.25rem; }

/* --- spec rows ---------------------------------------------------------- */

.specs {
  margin-top: 2.25rem;
  border-top: 1px solid var(--line);
}

.specs__row {
  display: flex;
  justify-content: space-between;
  gap: 1.5rem;
  padding: .85rem 0;
  border-bottom: 1px solid var(--line);
}

.specs__row dt { color: var(--muted); }

.specs__row dd {
  font-family: var(--font-mono);
  font-size: .82rem;
  letter-spacing: .04em;
  text-align: right;
}

/* --- swatches ----------------------------------------------------------- */

.swatches {
  display: flex;
  flex-wrap: wrap;
  gap: .6rem;
  margin-top: 2rem;
}

.swatch {
  font-family: var(--font-mono);
  font-size: .64rem;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--muted);
  background: transparent;
  border: 1px solid var(--line);
  padding: .5rem .8rem .5rem .6rem;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: .55rem;
  transition: border-color .25s ease, color .25s ease;
}

.swatch::before {
  content: '';
  width: .85rem;
  height: .85rem;
  background: var(--sw);
  border: 1px solid rgba(243, 240, 234, .25);
}

.swatch.is-active,
.swatch:hover { border-color: var(--accent); color: var(--text); }

.swatches--small .swatch { padding: .4rem; }
.swatches--small .swatch::before { width: 1.1rem; height: 1.1rem; }

.add { margin-top: 2rem; }

/* --- arc horizontal track ------------------------------------------------ */

.arc-track {
  margin-top: 2.25rem;
  overflow: hidden;
  border: 1px solid var(--line);
}

.arc-track__inner {
  display: grid;
  /* Three panels each one viewport-of-track wide: the track is 3x its
     container, so xPercent: -66.667 lands exactly on the third panel. */
  grid-template-columns: repeat(3, 1fr);
  width: 300%;
  will-change: transform;
}

.arc-panel {
  height: clamp(8rem, 20vh, 13rem);
  background:
    radial-gradient(120% 90% at 30% 15%, rgba(243, 240, 234, .10), transparent 60%),
    linear-gradient(160deg, color-mix(in srgb, var(--sw) 70%, #000), var(--sw));
  display: grid;
  place-items: end start;
  padding: 1rem;
}

/* The caption must adapt to a panel that ranges from near-black to near-white.
   `difference` only does that when the source is pure white: a near-black
   source over the near-black Onyx panel yields near-black on near-black. */
.arc-panel span { color: #fff; mix-blend-mode: difference; }

/* --- flavours ----------------------------------------------------------- */

.flavours {
  display: grid;
  gap: .75rem;
  margin-top: 2.25rem;
}

.flavour {
  border: 1px solid var(--line);
  background: var(--surface);
  padding: 1rem 1.15rem;
  border-left: 3px solid var(--sw);
}

.flavour__name {
  font-family: var(--font-display);
  font-size: 1.35rem;
}

.flavour__note { color: var(--muted); font-size: .9rem; }

/* Pinned only: the three cards become an overlapping deck that deals itself
   in as the scrub advances. Un-pinned (mobile, no JS, reduced motion) they
   stay an ordinary stacked list — nothing is ever clipped away. */
.is-pinned .flavours {
  position: relative;
  height: 175px;
  overflow: hidden;
}

.is-pinned .flavour {
  position: absolute;
  left: 0;
  right: 0;
  top: 80px;
}

/* Tasting notes exist only for the cross-fade inside a pin; below 768px the
   flavour cards already carry their own note, so this is hidden outright. */
.tasting { display: none; }

.is-pinned .tasting {
  display: block;
  position: relative;
  height: 1.6rem;
  margin-top: 1.1rem;
}

.tasting__note {
  font-family: var(--font-display);
  font-style: italic;
  font-size: 1.1rem;
  color: var(--muted);
}

.is-pinned .tasting__note {
  position: absolute;
  inset: 0;
  opacity: 0;
}

.is-pinned .tasting__note:first-child { opacity: 1; }

/* ==========================================================================
   Range
   ========================================================================== */

.range__head { margin-bottom: clamp(2rem, 5vh, 4rem); }
.range__head .section-sub { margin-top: 1rem; }

.range__grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: clamp(1rem, 2vw, 2rem);
}

.card {
  background: var(--surface);
  border: 1px solid var(--line);
  display: flex;
  flex-direction: column;
}

.card img {
  width: 100%;
  height: clamp(12rem, 26vh, 20rem);
  object-fit: cover;
}

.card__body {
  padding: 1.5rem 1.4rem 1.75rem;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: .55rem;
  flex: 1;
}

.card__index { color: var(--muted); }

.card__name {
  font-family: var(--font-display);
  font-weight: 400;
  font-size: 1.9rem;
  line-height: 1;
}

.card__tag { color: var(--muted); font-size: .92rem; }

.card__price {
  font-family: var(--font-mono);
  font-size: 1.15rem;
  color: var(--accent);
  margin-top: .35rem;
}

.card .swatches { margin-top: .35rem; }
.card .add { margin-top: auto; padding-top: .95rem; }

/* ==========================================================================
   Craft
   ========================================================================== */

/* 46rem, not 40rem: "Machined, not moulded" measures 701px at --display-sm
   and was overflowing this box by 61px. The display scale itself
   (clamp(3rem,11vw,11rem)) cannot be used for a 19-character heading — at
   1440px it needs 1509px of a 640px column — so --display is reserved for the
   full-bleed hero wordmark and order title. */
.craft__copy { max-width: 46rem; }
.craft__body { margin-top: 1.25rem; }
.craft__copy .specs { max-width: 30rem; }

.craft__stack {
  position: relative;
  margin-top: clamp(2.5rem, 6vh, 5rem);
  min-height: clamp(24rem, 62vh, 44rem);
}

.craft__img {
  position: absolute;
  object-fit: cover;
  border: 1px solid var(--line);
}

.craft__img--a {
  width: min(64%, 46rem);
  height: clamp(16rem, 40vh, 28rem);
  top: 0;
  left: 0;
}

.craft__img--b {
  width: min(54%, 38rem);
  height: clamp(14rem, 34vh, 24rem);
  right: 0;
  bottom: 0;
}

/* ==========================================================================
   Order
   ========================================================================== */

#order { min-height: 80svh; display: grid; place-items: center; text-align: center; }

.order__title { font-size: var(--display); }
.order__sub { margin: 1.5rem auto 2.5rem; text-align: center; }

/* ==========================================================================
   Footer
   ========================================================================== */

#footer {
  border-top: 1px solid var(--line);
  padding: clamp(3rem, 8vh, 5rem) var(--gutter) clamp(4rem, 10vh, 6rem);
  display: grid;
  gap: .85rem;
}

.footer__nav { display: flex; flex-wrap: wrap; gap: 1.5rem; margin-bottom: 1.5rem; }

.footer__nav a {
  font-family: var(--font-mono);
  font-size: .7rem;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--muted);
  text-decoration: none;
  transition: color .25s ease;
}

.footer__nav a:hover { color: var(--accent); }

.footer__note { color: var(--muted); }

.footer__brand {
  font-family: var(--font-display);
  font-size: clamp(3rem, 12vw, 9rem);
  line-height: .9;
  color: rgba(243, 240, 234, .07);
  margin-top: 2rem;
  letter-spacing: -.03em;
}

/* ==========================================================================
   Cart drawer
   ========================================================================== */

/* Scroll lock shared by the drawer and the checkout. Separate from
   `.is-gated` on purpose: the age gate and the cart are different states and
   must never be conflated when one opens while the other is already open. */
body.is-locked { overflow: hidden; }

.scrim {
  position: fixed;
  inset: 0;
  z-index: 55; /* above the HUD (50), below the drawer (60) */
  background: rgba(10, 10, 11, .72);
  backdrop-filter: blur(2px);
}

@keyframes badge-bump {
  0% { transform: scale(1); }
  35% { transform: scale(1.45); }
  100% { transform: scale(1); }
}

.hud__count.is-bump { animation: badge-bump .45s ease; }

/* `#checkoutBtn` carries `.btn--solid`, so `.btn:disabled` already covers it */
.btn:disabled {
  opacity: .4;
  cursor: not-allowed;
}

.field__msg {
  font-family: var(--font-mono);
  font-size: .68rem;
  letter-spacing: .04em;
  text-transform: none;
  /* Spec §4: "Ember red may appear solely as a product colourway swatch,
     never as UI." The error state is therefore signalled with the text colour
     plus aria-invalid and focus, never with a second hue. */
  color: var(--text);
}

.drawer {
  position: fixed;
  top: 0;
  right: 0;
  z-index: var(--z-drawer);
  width: min(27rem, 100vw);
  height: 100dvh;
  background: var(--surface);
  border-left: 1px solid var(--line);
  display: flex;
  flex-direction: column;
  transform: translateX(0);
}

.drawer__head,
.checkout__head {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1.25rem 1.5rem;
  border-bottom: 1px solid var(--line);
  color: var(--muted);
}

.drawer__close {
  background: transparent;
  border: 1px solid var(--line);
  color: var(--text);
  font-size: 1.1rem;
  line-height: 1;
  width: 2rem;
  height: 2rem;
  cursor: pointer;
}

.drawer__close:hover { border-color: var(--accent); color: var(--accent); }

.drawer__body { flex: 1; overflow-y: auto; padding: 1.5rem; }

.drawer__empty { color: var(--muted); }

.drawer__lines { list-style: none; padding: 0; margin: 0; display: grid; gap: 1.25rem; }

.line { display: grid; grid-template-columns: 1fr auto; gap: .35rem 1rem; }

.line__name { font-family: var(--font-display); font-size: 1.25rem; }
.line__variant { color: var(--muted); font-size: .85rem; grid-column: 1; }
.line__total { font-family: var(--font-mono); font-size: .95rem; color: var(--accent); text-align: right; }

.line__controls {
  grid-column: 1 / -1;
  display: flex;
  align-items: center;
  gap: .6rem;
  margin-top: .35rem;
}

.qty {
  font-family: var(--font-mono);
  font-size: .78rem;
  border: 1px solid var(--line);
  background: transparent;
  color: var(--text);
  width: 1.85rem;
  height: 1.85rem;
  cursor: pointer;
}

.qty:hover { border-color: var(--accent); color: var(--accent); }

.line__count { font-family: var(--font-mono); font-size: .78rem; min-width: 1.5rem; text-align: center; }

.line__remove {
  margin-left: auto;
  background: none;
  border: 0;
  color: var(--muted);
  font-family: var(--font-mono);
  font-size: .68rem;
  letter-spacing: .12em;
  text-transform: uppercase;
  cursor: pointer;
}

.line__remove:hover { color: var(--text); }

.drawer__foot {
  border-top: 1px solid var(--line);
  padding: 1.5rem;
  display: grid;
  gap: .75rem;
}

.drawer__row {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  color: var(--muted);
}

.drawer__row strong {
  font-family: var(--font-mono);
  font-size: 1.25rem;
  font-weight: 500;
  color: var(--text);
}

.drawer__continue { border-color: transparent; color: var(--muted); }

/* ==========================================================================
   Checkout
   ========================================================================== */

.checkout {
  position: fixed;
  inset: 0;
  z-index: var(--z-checkout);
  background: var(--bg);
  overflow-y: auto;
  padding: clamp(4.5rem, 10vh, 7rem) var(--gutter) clamp(3rem, 8vh, 5rem);
}

.checkout__panel { max-width: 72rem; margin-inline: auto; }

.checkout__head { padding-inline: 0; padding-top: 0; }

.checkout__grid {
  display: grid;
  grid-template-columns: 1.25fr .75fr;
  gap: clamp(2rem, 5vw, 4rem);
  align-items: start;
}

.checkout__fields { display: grid; grid-template-columns: 1fr 1fr; gap: 1.15rem; }

.field {
  display: grid;
  gap: .5rem;
  font-family: var(--font-mono);
  font-size: .68rem;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--muted);
}

.field--wide { grid-column: 1 / -1; }

.field input,
.field textarea {
  font-family: var(--font-body);
  font-size: 1rem;
  letter-spacing: normal;
  text-transform: none;
  color: var(--text);
  background: var(--surface);
  border: 1px solid var(--line);
  padding: .8rem .9rem;
  resize: vertical;
}

.field input:focus,
.field textarea:focus { outline: none; border-color: var(--accent); }

.field.is-invalid input,
.field.is-invalid textarea { border-color: var(--text); }

.field__error {
  grid-column: 1 / -1;
  /* spec §4: ember is a product colourway, never UI */
  color: var(--text);
  font-family: var(--font-mono);
  font-size: .72rem;
  letter-spacing: .06em;
}

.checkout__demo { grid-column: 1 / -1; color: var(--muted); }
.checkout__fields .btn { grid-column: 1 / -1; justify-self: start; }

.checkout__summary {
  border: 1px solid var(--line);
  background: var(--surface);
  padding: 1.5rem;
  display: grid;
  gap: 1rem;
}

.checkout__summary > .mono { color: var(--muted); }

.checkout__lines { list-style: none; padding: 0; margin: 0; display: grid; gap: .75rem; }

.checkout__lines li {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  font-family: var(--font-mono);
  font-size: .8rem;
  color: var(--muted);
}

.checkout__lines b { color: var(--text); font-weight: 500; }

.checkout__confirm { text-align: center; padding: clamp(2rem, 8vh, 5rem) 0; }
.checkout__confirm > .mono { color: var(--accent); }

.checkout__number {
  font-family: var(--font-mono);
  font-size: clamp(1.8rem, 5vw, 3.4rem);
  letter-spacing: .08em;
  margin: 1rem 0;
}

.checkout__eta { font-family: var(--font-display); font-size: 1.5rem; margin-bottom: 1rem; }
.checkout__confirm .checkout__demo { margin-bottom: 2rem; }

/* ==========================================================================
   Reveal start state (Task 7 animates these in)
   ========================================================================== */

.reveal { opacity: 0; transform: translateY(32px); }

/* Image-failure fallback — spec §5. The plate is a real, deliberate
   treatment: vapour texture plus the alt text set typographically. */
.is-plate {
  position: relative;
  background: var(--surface) url('../assets/img/texture-plate.jpg') center / cover no-repeat;
}

.is-plate > img { visibility: hidden; }

.is-plate::after {
  content: attr(data-plate-label);
  position: absolute;
  right: 1rem;
  bottom: 1rem;
  max-width: 60%;
  font-family: var(--font-mono);
  font-size: .66rem;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--text);
  opacity: .7;
  text-align: right;
}

/* ==========================================================================
   Responsive
   ========================================================================== */

@media (max-width: 1023px) {
  .range__grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .checkout__grid { grid-template-columns: 1fr; }
}

@media (max-width: 899px) {
  .craft__stack { min-height: clamp(20rem, 50vh, 32rem); }
}

@media (max-width: 767px) {
  #hero {
    grid-template-columns: 1fr;
    min-height: auto;
    padding-top: clamp(5.5rem, 16vh, 8rem);
    /* the scroll cue is absolutely positioned and ~74px tall including its
       rule; without this the last line of hero copy collides with it */
    padding-bottom: clamp(6.5rem, 13vh, 8rem);
  }
  .hero__copy, .hero__media { grid-column: 1; grid-row: auto; }
  .hero__media { order: -1; }
  .hero__media img { height: clamp(16rem, 42vh, 26rem); }

  .chapter { grid-template-columns: 1fr; }
  .chapter__media { position: static; }
  .chapter__detail { width: 100%; }

  .craft__img--a, .craft__img--b { position: relative; width: 100%; }
  .craft__img--b { margin-top: 1rem; }
  .craft__stack { min-height: 0; }
}

@media (max-width: 639px) {
  .range__grid { grid-template-columns: 1fr; }
  .checkout__fields { grid-template-columns: 1fr; }
  .hud__section { display: none; }
  .hud { grid-template-columns: auto auto; justify-content: space-between; }
}

@media (max-width: 479px) {
  .arc-track { display: none; }
}

/* ==========================================================================
   Reduced motion — spec §4: pins released, content in normal flow
   ========================================================================== */

@media (prefers-reduced-motion: reduce) {
  * {
    animation-duration: .001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .001ms !important;
    scroll-behavior: auto !important;
  }
  .reveal { opacity: 1 !important; transform: none !important; }
  .manifesto__plate, .craft__img, .hero__media img { transform: none !important; }
}