/* Hallmark · genre: editorial (luxury register) · macrostructure: Feature Stack (sticky 3D stage + scrolling chapters) · theme: custom (Florentine goldsmith) · enrichment: Tier-B procedural 3D (Three.js, no model files) · nav: N10 floating-on-scroll morph · footer: Ft3 index · tone: quiet luxury · anchor hue: 75 gold
 * Hallmark · pre-emit critique: P5 H5 E4 S5 R4 V5
 */
html, body { overflow-x: clip; }
body { background: var(--color-paper); color: var(--color-ink-2); font-family: var(--font-body); font-size: var(--text-base); line-height: var(--lh-body); }
a { color: var(--color-ink); text-underline-offset: 0.22em; text-decoration-thickness: 1px; transition: color var(--dur-micro) var(--ease-out); }
@media (hover: hover) { a:hover { color: var(--color-accent); } }
:focus-visible { outline: 2px solid var(--color-focus); outline-offset: 3px; }
h1, h2, h3 { font-family: var(--font-display); font-weight: 500; font-style: normal; color: var(--color-ink); line-height: 1.04; letter-spacing: -0.012em; margin: 0; overflow-wrap: anywhere; min-width: 0; }
p { margin: 0; }
/* Demo label pinned to the bottom edge so it never hides the floating nav. */
.demo-banner { position: fixed; inset-inline: 0; bottom: 0; z-index: calc(var(--z-sticky) + 1); font-size: var(--text-xs); padding-block: var(--space-2xs); }
body { padding-bottom: 2.5rem; }

/* ── N10 nav: bar → floating pill ─────────────────────────── */
.nav { position: fixed; inset-inline: 0; top: 0; z-index: var(--z-sticky); padding-block: 0;
  background-color: oklch(95% 0.008 75 / 0.86); border-bottom: 1px solid var(--color-rule);
  transition: padding var(--dur-morph) var(--ease-out), background-color var(--dur-morph) var(--ease-out), border-color var(--dur-morph) var(--ease-out); }
.page-index .nav { position: fixed; }
.nav__inner { display: flex; align-items: center; gap: var(--space-lg); margin-inline: auto; max-width: var(--page-max);
  min-height: 64px; padding: var(--space-sm) var(--page-gutter); border-radius: 0; background-color: transparent; box-shadow: none; transform: translateY(0);
  transition: max-width var(--dur-morph) var(--ease-out), min-height var(--dur-morph) var(--ease-out), padding var(--dur-morph) var(--ease-out), border-radius var(--dur-morph) var(--ease-out), background-color var(--dur-morph) var(--ease-out), box-shadow var(--dur-morph) var(--ease-out), transform var(--dur-morph) var(--ease-out); }
.nav.is-floating { padding-block: 6px; background-color: transparent; border-color: transparent; }
.nav.is-floating .nav__inner { max-width: 60rem; min-height: 52px; padding-block: var(--space-2xs); border-radius: 999px;
  background-color: oklch(97% 0.006 75 / 0.94); box-shadow: 0 12px 32px -18px oklch(30% 0.03 60 / 0.35), 0 0 0 1px oklch(80% 0.014 70 / 0.8); transform: translateY(10px); }
.nav__mark { font-family: var(--font-display); font-size: var(--text-md); font-weight: 600; letter-spacing: 0.02em; color: var(--color-ink); text-decoration: none; white-space: nowrap; }
.nav__links { list-style: none; margin: 0; padding: 0; display: flex; gap: var(--space-lg); }
.nav__links a { display: inline-block; padding-block: var(--space-xs); font-size: var(--text-sm); text-decoration: none; white-space: nowrap; color: var(--color-ink-2); }
.nav__links a[aria-current="page"] { color: var(--color-ink); text-decoration: underline; text-decoration-color: var(--color-gold); text-decoration-thickness: 2px; text-underline-offset: 0.5em; }
.nav__cta { margin-inline-start: auto; white-space: nowrap; font-size: var(--text-sm); text-decoration: none; padding: var(--space-xs) var(--space-md); border: 1px solid var(--color-ink); border-radius: 999px; transition: background-color var(--dur-micro) var(--ease-out), color var(--dur-micro) var(--ease-out); }
@media (hover: hover) { .nav__cta:hover { background: var(--color-ink); color: var(--color-paper); } }
.nav__toggle { display: none; }

@media (max-width: 59.99rem) {
  .nav nav { position: absolute; inset-inline: var(--space-sm); top: calc(100% + var(--space-xs)); display: none; padding: var(--space-md) var(--space-lg);
    background: var(--color-paper); border: 1px solid var(--color-rule); border-radius: 18px; box-shadow: 0 18px 40px -24px oklch(30% 0.03 60 / 0.4); }
  .nav.is-open nav { display: block; }
  .nav__links { flex-direction: column; gap: 0; }
  .nav__links a { font-size: var(--text-md); font-family: var(--font-display); padding-block: var(--space-sm); }
  .nav__toggle { display: inline-flex; align-items: center; min-height: 44px; margin-inline-start: auto; padding: 0 var(--space-md); background: none; border: 0; color: var(--color-ink); font: inherit; font-size: var(--text-sm); cursor: pointer; }
  .nav__cta { margin-inline-start: 0; }
}
@media (max-width: 26rem) { .nav__cta { display: none; } }

main { padding-top: 64px; }
.page-index main { padding-top: 0; }

/* ── Home: Feature Stack with a sticky 3D stage ─────────────── */
.story { position: relative; }
.story__stage { position: sticky; top: 0; height: 100dvh; margin-bottom: -100dvh; z-index: 0;
  background: radial-gradient(60% 50% at 70% 50%, var(--color-paper) 0%, var(--color-paper-2) 100%); }
.story__stage canvas { display: block; width: 100%; height: 100%; }
.story__fallback { display: none; }
.story__stage.is-fallback canvas { display: none; }
.story__stage.is-fallback .story__fallback { display: block; position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; }
.chapter { position: relative; z-index: 1; min-height: 100dvh; display: grid; align-items: end; padding: var(--space-4xl) var(--page-gutter) var(--space-2xl); max-width: var(--page-max); margin-inline: auto; }
.chapter__text { display: grid; gap: var(--space-md); max-width: 30rem; padding: var(--space-lg); background: oklch(95% 0.008 75 / 0.9); border-radius: 4px; }
.chapter--hero .chapter__text { background: transparent; padding: 0; max-width: 40rem; }
.chapter h1 { font-size: var(--text-display); }
.chapter h2 { font-size: var(--text-xl); }
.chapter__kicker { font-size: var(--text-sm); color: var(--color-muted); }
.chapter__lede { font-size: var(--text-md); color: var(--color-ink); line-height: 1.45; max-width: 34ch; }
.scroll-cue { font-size: var(--text-sm); color: var(--color-muted); }

.actions { display: flex; flex-wrap: wrap; gap: var(--space-sm) var(--space-lg); align-items: center; }
.btn { display: inline-flex; align-items: center; justify-content: center; min-height: 48px; padding: var(--space-sm) var(--space-xl); border-radius: 999px;
  background: var(--color-ink); color: var(--color-accent-ink); text-decoration: none; white-space: nowrap; font-size: var(--text-sm); letter-spacing: 0.02em;
  transition: background-color var(--dur-micro) var(--ease-out), transform var(--dur-micro) var(--ease-out); }
@media (hover: hover) { .btn:hover { background: var(--color-accent); color: var(--color-accent-ink); } }
.btn:active { transform: translateY(1px); }
.btn--ghost { background: transparent; color: var(--color-ink); border: 1px solid var(--color-ink); }
@media (hover: hover) { .btn--ghost:hover { background: var(--color-ink); color: var(--color-paper); } }
.link { white-space: nowrap; }

/* ── Sections ──────────────────────────────────────────────── */
.section { position: relative; z-index: 1; background: var(--color-paper); padding: var(--space-3xl) var(--page-gutter); }
.section__inner { max-width: var(--page-max); margin-inline: auto; display: grid; gap: var(--space-xl); }
.section__head { display: grid; gap: var(--space-sm); max-width: 40rem; }
.section__head h2, .section__head h1 { font-size: var(--text-xl); }
.section__head p { color: var(--color-muted); }

/* F6 product grid */
.products { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: var(--space-xl) var(--space-md); }
.product { display: grid; gap: var(--space-xs); align-content: start; }
.product__media { display: block; aspect-ratio: 4 / 5; overflow: hidden; background: var(--color-paper-2); border-radius: 2px; }
.product__media img { width: 100%; height: 100%; object-fit: cover; transition: transform 700ms var(--ease-out); }
@media (hover: hover) { .product__media:hover img { transform: scale(1.02); } }
.product__name { font-family: var(--font-display); font-size: var(--text-md); font-weight: 500; }
.product__meta { font-size: var(--text-sm); color: var(--color-muted); }
.product__price { font-size: var(--text-sm); color: var(--color-ink); font-variant-numeric: tabular-nums; }
.product__badge { justify-self: start; font-size: var(--text-xs); color: var(--color-accent); border: 1px solid var(--color-accent); border-radius: 999px; padding: 0 var(--space-xs); }

/* Split blocks (laboratorio) */
.split { display: grid; gap: var(--space-xl); align-items: center; }
.split img { width: 100%; height: auto; border-radius: 2px; background: var(--color-paper-2); }
.split__text { display: grid; gap: var(--space-md); max-width: var(--measure); }
.split__text h2 { font-size: var(--text-lg); }

.steps { list-style: none; margin: 0; padding: 0; display: grid; gap: var(--space-xl); counter-reset: step; }
.steps li { display: grid; gap: var(--space-xs); padding-top: var(--space-md); border-top: 1px solid var(--color-rule); max-width: var(--measure); }
.steps h3 { font-size: var(--text-md); }
.steps li::before { counter-increment: step; content: counter(step, upper-roman); font-family: var(--font-display); color: var(--color-accent); font-size: var(--text-md); }

/* ── Product page: 3D configurator ─────────────────────────── */
.pdp { display: grid; gap: var(--space-xl); max-width: var(--page-max); margin-inline: auto; padding: var(--space-xl) var(--page-gutter) var(--space-3xl); }
.viewer { position: relative; aspect-ratio: 1 / 1; border-radius: 4px; overflow: hidden;
  background: radial-gradient(70% 60% at 50% 45%, var(--color-paper) 0%, var(--color-paper-2) 100%); cursor: grab; }
.viewer:active { cursor: grabbing; }
.viewer canvas { display: block; width: 100%; height: 100%; }
.viewer__hint { position: absolute; left: 50%; bottom: var(--space-md); transform: translateX(-50%); font-size: var(--text-xs); color: var(--color-muted); white-space: nowrap; pointer-events: none; }
.viewer__fallback { display: none; }
.viewer.is-fallback canvas, .viewer.is-fallback .viewer__hint { display: none; }
.viewer.is-fallback .viewer__fallback { display: block; width: 100%; height: 100%; object-fit: cover; }
.pdp__info { display: grid; gap: var(--space-lg); align-content: start; max-width: 32rem; }
.pdp__info h1 { font-size: var(--text-xl); }
.pdp__price { font-family: var(--font-display); font-size: var(--text-lg); color: var(--color-ink); font-variant-numeric: lining-nums tabular-nums; }
.configure { display: grid; gap: var(--space-lg); }
.configure fieldset { border: 0; margin: 0; padding: 0; display: grid; gap: var(--space-sm); }
.configure legend, .configure label.field { font-size: var(--text-sm); color: var(--color-muted); margin-bottom: var(--space-xs); }
.swatches { display: flex; flex-wrap: wrap; gap: var(--space-sm); }
.swatch { position: relative; }
.swatch input { position: absolute; opacity: 0; inset: 0; margin: 0; cursor: pointer; }
.swatch span { display: inline-flex; align-items: center; gap: var(--space-xs); min-height: 44px; padding: 0 var(--space-md) 0 var(--space-xs); border: 1px solid var(--color-rule); border-radius: 999px; font-size: var(--text-sm); white-space: nowrap; transition: border-color var(--dur-micro) var(--ease-out); }
.swatch span::before { content: ""; width: 26px; height: 26px; border-radius: 50%; background: var(--sw); box-shadow: inset 0 -3px 6px oklch(30% 0.03 60 / 0.25); }
.swatch input:checked + span { border-color: var(--color-ink); box-shadow: inset 0 0 0 1px var(--color-ink); }
.swatch input:focus-visible + span { outline: 2px solid var(--color-focus); outline-offset: 3px; }
.swatch--giallo { --sw: var(--color-gold); }
.swatch--rosa { --sw: oklch(78% 0.08 40); }
.swatch--bianco { --sw: oklch(88% 0.008 250); }
.configure select { min-height: 48px; padding: 0 var(--space-md); border: 1px solid var(--color-rule); border-radius: 999px; background: var(--color-paper); color: var(--color-ink); font: inherit; max-width: 12rem; }
.specs { margin: 0; display: grid; grid-template-columns: auto minmax(0, 1fr); gap: var(--space-xs) var(--space-lg); font-size: var(--text-sm); border-top: 1px solid var(--color-rule); padding-top: var(--space-md); }
.specs dt { color: var(--color-muted); }
.specs dd { margin: 0; color: var(--color-ink); }

/* Contacts */
.info { margin: 0; display: grid; gap: var(--space-md); }
.info dt { font-size: var(--text-sm); color: var(--color-muted); }
.info dd { margin: 0; color: var(--color-ink); font-size: var(--text-md); }
.map-consent { background: var(--color-paper-2); border-radius: 4px; }
.map-consent button { min-height: 44px; padding: 0 var(--space-lg); border: 1px solid var(--color-ink); border-radius: 999px; background: transparent; color: var(--color-ink); cursor: pointer; font: inherit; }

.legal { display: grid; gap: var(--space-lg); max-width: 44rem; }
.legal section { display: grid; gap: var(--space-xs); }
.legal h2 { font-size: var(--text-md); }

/* ── Ft3 index footer ──────────────────────────────────────── */
.foot { position: relative; z-index: 1; background: var(--color-ink); color: oklch(85% 0.01 75); padding: var(--space-3xl) var(--page-gutter) var(--space-xl); }
.foot__cols { max-width: var(--page-max); margin-inline: auto; display: grid; gap: var(--space-xl); grid-template-columns: repeat(auto-fit, minmax(12rem, 1fr)); }
.foot__head { font-family: var(--font-display); font-size: var(--text-md); color: var(--color-accent-ink); margin-bottom: var(--space-sm); }
.foot ul { list-style: none; margin: 0; padding: 0; display: grid; gap: var(--space-2xs); font-size: var(--text-sm); }
.foot a { color: oklch(85% 0.01 75); text-decoration: none; }
@media (hover: hover) { .foot a:hover { color: var(--color-gold); } }
.foot__legal { max-width: var(--page-max); margin: var(--space-2xl) auto 0; padding-top: var(--space-md); border-top: 1px solid oklch(35% 0.01 60); font-size: var(--text-xs); color: oklch(72% 0.01 75); }

@media (min-width: 48rem) {
  .products { grid-template-columns: repeat(3, minmax(0, 1fr)); gap: var(--space-2xl) var(--space-lg); }
  .split { grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); gap: var(--space-2xl); }
  .split--rev .split__text { order: -1; }
}
@media (min-width: 60rem) {
  .chapter { align-items: center; }
  .chapter__text { background: transparent; padding: 0; }
  .products--four { grid-template-columns: repeat(4, minmax(0, 1fr)); }
  .pdp { grid-template-columns: minmax(0, 1.15fr) minmax(0, 0.85fr); align-items: start; padding-top: var(--space-2xl); }
  .viewer { position: sticky; top: 88px; }
}