/* Direzione A — "Scheda Tecnica" — laroba.css
   Target markup: see comments per section.
   Dependencies: none (system fonts, no CDN).
   ──────────────────────────────────────────── */

/* ── §0  @property (animatable tokens) ─────── */

@property --reveal {
  syntax: '<number>';
  inherits: false;
  initial-value: 0;
}

@property --shimmer-x {
  syntax: '<percentage>';
  inherits: false;
  initial-value: -100%;
}

@property --fill {
  syntax: '<number>';
  inherits: false;
  initial-value: 0;
}

/* ── §1  Design tokens ─────────────────────── */

:root {
  --c-fondo:    #EDEBE6;
  --c-bianco:   #F7F5F0;
  --c-lamiera:  #DDD8CE;
  --c-grezzo:   #C9C1B3;
  --c-acciaio:  #8C9196;
  --c-grafite:  #4A4A4C;
  --c-ghisa:    #2C2C2E;
  --c-nero:     #191919;
  --c-ruggine:  #A63D1F;
  --c-ottone:   #C49A2A;

  --f-mono: ui-monospace, 'Cascadia Code', 'Source Code Pro', Menlo,
            Consolas, 'Liberation Mono', monospace;
  --f-body: system-ui, -apple-system, 'Segoe UI', Roboto,
            'Helvetica Neue', Arial, sans-serif;

  --s1:  0.25rem;  --s2:  0.5rem;   --s3:  0.75rem;
  --s4:  1rem;     --s5:  1.5rem;   --s6:  2rem;
  --s7:  3rem;     --s8:  4rem;     --s9:  6rem;
  --s10: 8rem;

  --ease-mech: cubic-bezier(0.2, 0, 0, 1);
  --dur-snap:  120ms;
  --dur-fast:  200ms;
  --dur-med:   400ms;
  --dur-slow:  800ms;

  --gutter:  clamp(1rem, 4vw, 3rem);
  --max-w:   1440px;
  --grid-u:  8px;
}

/* ── §2  Reset ─────────────────────────────── */

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

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

body {
  font-family: var(--f-body);
  font-size: 1rem;
  line-height: 1.6;
  color: var(--c-nero);
  background: var(--c-fondo);
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

img, svg, canvas { display: block; max-width: 100%; }
a { color: inherit; }
ul, ol { list-style: none; }
button { font: inherit; cursor: pointer; border: none; background: none; }

/* ── §3  Carta millimetrata (background grid) ── */
/* body::before = griglia visibile su tutto il sito */

body::before {
  content: '';
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  background:
    linear-gradient(var(--c-grafite) 0.5px, transparent 0.5px),
    linear-gradient(90deg, var(--c-grafite) 0.5px, transparent 0.5px),
    linear-gradient(var(--c-grafite) 0.5px, transparent 0.5px),
    linear-gradient(90deg, var(--c-grafite) 0.5px, transparent 0.5px);
  background-size:
    40px 40px,
    40px 40px,
    var(--grid-u) var(--grid-u),
    var(--grid-u) var(--grid-u);
  opacity: 0.07;
}

/* ── §4  Progress bar (scala metrica) ──────── */
/* Markup: <div class="progress"><div class="progress__fill"></div></div> */

.progress {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  z-index: 200;
  background:
    repeating-linear-gradient(
      90deg,
      transparent 0,
      transparent calc(2% - 0.5px),
      color-mix(in srgb, var(--c-grafite) 40%, transparent) calc(2% - 0.5px),
      color-mix(in srgb, var(--c-grafite) 40%, transparent) 2%
    );
  pointer-events: none;
}

.progress__fill {
  height: 100%;
  width: 100%;
  background: var(--c-ruggine);
  transform-origin: left center;
  transform: scaleX(0);
  will-change: transform;
}

/* ── §5  Navigazione ───────────────────────── */
/* Markup: <nav class="nav" id="nav">
             <a class="nav__logo" href="/">LAROBA</a>
             <button class="nav__toggle" aria-expanded="false" aria-label="Menu">
               <span></span><span></span><span></span>
             </button>
             <ul class="nav__links">
               <li><a class="nav__link" href="#categorie">Categorie</a></li>…
             </ul>
           </nav> */

.nav {
  position: fixed;
  top: 3px;                 /* sotto la progress bar */
  left: 0;
  right: 0;
  z-index: 150;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--s3) var(--gutter);
  background: transparent;
  border-bottom: 1px solid transparent;
  transition:
    background var(--dur-med) var(--ease-mech),
    border-color var(--dur-med) var(--ease-mech);
}

.nav.is-scrolled {
  background: color-mix(in srgb, var(--c-fondo) 94%, transparent);
  border-bottom-color: var(--c-grezzo);
}

.nav__logo {
  font-family: var(--f-mono);
  font-size: 0.875rem;
  font-weight: 700;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  text-decoration: none;
  color: var(--c-nero);
}

.nav__links {
  display: flex;
  gap: var(--s6);
  align-items: center;
}

.nav__link {
  font-family: var(--f-mono);
  font-size: 0.6875rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  text-decoration: none;
  color: var(--c-grafite);
  position: relative;
  padding-block: var(--s1);
  transition: color var(--dur-fast) var(--ease-mech);
}

.nav__link::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 1px;
  background: var(--c-ruggine);
  transition: width var(--dur-fast) var(--ease-mech);
}

.nav__link:hover,
.nav__link[aria-current="true"] {
  color: var(--c-nero);
}

.nav__link:hover::after,
.nav__link[aria-current="true"]::after {
  width: 100%;
}

.nav__toggle {
  display: none;
  width: 28px;
  height: 20px;
  position: relative;
  z-index: 160;
}

.nav__toggle span {
  display: block;
  width: 100%;
  height: 1.5px;
  background: var(--c-nero);
  position: absolute;
  left: 0;
  transition: transform var(--dur-fast) var(--ease-mech),
              opacity var(--dur-fast) var(--ease-mech);
}

.nav__toggle span:nth-child(1) { top: 2px; }
.nav__toggle span:nth-child(2) { top: 9px; }
.nav__toggle span:nth-child(3) { top: 16px; }

.nav__toggle[aria-expanded="true"] span:nth-child(1) {
  top: 9px; transform: rotate(45deg);
}
.nav__toggle[aria-expanded="true"] span:nth-child(2) {
  opacity: 0;
}
.nav__toggle[aria-expanded="true"] span:nth-child(3) {
  top: 9px; transform: rotate(-45deg);
}

/* ── §6  Hero ──────────────────────────────── */
/* Markup: <header class="hero" id="hero">
             <div class="hero__content">
               <p class="hero__label">§ 001 — Recupero industriale</p>
               <h1 class="hero__title">LAROBA</h1>
               <p class="hero__subtitle">Recommerce industriale</p>
               <p class="hero__desc">Viteria, bulloneria…</p>
             </div>
             <div class="hero__canvas-wrap">
               <canvas id="hero-canvas"></canvas>
               <span class="hero__canvas-label">FIG. 01 — ESAGONALE ⌀24</span>
             </div>
             <div class="hero__scroll-cue">Scorri</div>
           </header> */

.hero {
  position: relative;
  z-index: 1;
  min-height: 100dvh;
  display: grid;
  grid-template-columns: 1fr minmax(240px, 400px);
  grid-template-rows: 1fr auto;
  gap: var(--s6) var(--s8);
  padding: calc(var(--s8) + 52px) var(--gutter) var(--s6);
  align-items: center;
  max-width: var(--max-w);
  margin: 0 auto;
}

.hero__content {
  display: flex;
  flex-direction: column;
  gap: var(--s5);
  z-index: 2;
}

.hero__label {
  font-family: var(--f-mono);
  font-size: 0.6875rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--c-acciaio);
}

.hero__title {
  font-family: var(--f-mono);
  font-size: clamp(3.5rem, 10vw, 10rem);
  font-weight: 700;
  line-height: 0.85;
  letter-spacing: -0.03em;
  color: var(--c-nero);
  text-wrap: balance;
}

/* Character wrappers for GSAP reveal */
.char-wrap {
  display: inline-block;
  overflow: hidden;
  vertical-align: bottom;
}

.char {
  display: inline-block;
  will-change: transform;
}

.hero__subtitle {
  font-family: var(--f-mono);
  font-size: clamp(0.8125rem, 1.4vw, 1.0625rem);
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--c-grafite);
}

.hero__desc {
  font-family: var(--f-body);
  font-size: clamp(0.9375rem, 1.1vw, 1.0625rem);
  line-height: 1.65;
  color: var(--c-grafite);
  max-width: 44ch;
}

.hero__canvas-wrap {
  position: relative;
  aspect-ratio: 3 / 4;
  border: 1px solid var(--c-grezzo);
  overflow: hidden;
  /* Fallback if WebGL / JS unavailable */
  background:
    radial-gradient(
      ellipse at 55% 35%,
      color-mix(in srgb, var(--c-acciaio) 25%, transparent) 0%,
      transparent 65%
    ),
    linear-gradient(
      155deg,
      var(--c-lamiera) 0%,
      var(--c-fondo) 45%,
      color-mix(in srgb, var(--c-ruggine) 6%, var(--c-fondo)) 100%
    );
}

.hero__canvas-wrap canvas {
  width: 100%;
  height: 100%;
}

.hero__canvas-label {
  position: absolute;
  bottom: calc(-1 * var(--s5) - 0.25rem);
  left: 0;
  font-family: var(--f-mono);
  font-size: 0.625rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--c-acciaio);
  white-space: nowrap;
}

.hero__scroll-cue {
  grid-column: 1 / -1;
  grid-row: 2;
  justify-self: center;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--s2);
  font-family: var(--f-mono);
  font-size: 0.625rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--c-acciaio);
}

.hero__scroll-cue::after {
  content: '';
  width: 1px;
  height: 32px;
  background: var(--c-acciaio);
  animation: scroll-tick 2.4s var(--ease-mech) infinite;
}

@keyframes scroll-tick {
  0%, 100% { transform: scaleY(1); opacity: 1; }
  50%      { transform: scaleY(0.4); opacity: 0.3; }
}

/* ── §7  Sezioni — sistema ─────────────────── */
/* Markup: <section class="section" id="…">
             <div class="section__inner">
               <header class="section__header">
                 <span class="section__num">§ 002</span>
                 <h2 class="section__title">Categorie</h2>
               </header>
               <div class="section__body">…</div>
             </div>
           </section> */

.section {
  position: relative;
  z-index: 1;
}

.section__inner {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: var(--s9) var(--gutter);
}

.section__header {
  display: flex;
  align-items: baseline;
  gap: var(--s5);
  margin-bottom: var(--s7);
  position: relative;
}

.section__num {
  font-family: var(--f-mono);
  font-size: 0.625rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--c-acciaio);
  flex-shrink: 0;
  min-width: 3.5em;
}

.section__title {
  font-family: var(--f-mono);
  font-size: clamp(1.5rem, 3.5vw, 2.75rem);
  font-weight: 700;
  letter-spacing: -0.01em;
  text-transform: uppercase;
  color: var(--c-nero);
  line-height: 1.1;
}

/* Croci di registro agli angoli */
.section::before,
.section::after {
  content: '';
  position: absolute;
  width: 14px;
  height: 14px;
  opacity: 0.2;
  pointer-events: none;
}

.section::before {
  top: var(--s6);
  left: var(--gutter);
  border-top: 1px solid var(--c-grafite);
  border-left: 1px solid var(--c-grafite);
}

.section::after {
  top: var(--s6);
  right: var(--gutter);
  border-top: 1px solid var(--c-grafite);
  border-right: 1px solid var(--c-grafite);
}

/* ── §8  Divisore a linea di quota ─────────── */
/* Markup: <div class="dim-divider" role="separator">
             <div class="dim-divider__line"></div>
             <span class="dim-divider__value">1.240 mm</span>
             <div class="dim-divider__line"></div>
           </div> */

.dim-divider {
  display: flex;
  align-items: center;
  padding: 0 var(--gutter);
  max-width: var(--max-w);
  margin: 0 auto;
}

.dim-divider__line {
  flex: 1;
  height: 0;
  border-top: 1px solid var(--c-grezzo);
  position: relative;
}

.dim-divider__line::before,
.dim-divider__line::after {
  content: '';
  position: absolute;
  top: -4px;
  width: 1px;
  height: 9px;
  background: var(--c-grezzo);
}

.dim-divider__line:first-child::before { left: 0; }
.dim-divider__line:last-child::after   { right: 0; }

.dim-divider__value {
  font-family: var(--f-mono);
  font-size: 0.5625rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--c-acciaio);
  padding: 0 var(--s4);
  white-space: nowrap;
  flex-shrink: 0;
}

/* ── §9  Categorie — scroll orizzontale ────── */
/* Markup: <div class="catalog-scroll">
             <a class="cat-card" href="…">
               <span class="cat-card__label">§ A</span>
               <span class="cat-card__title">Viteria</span>
               <span class="cat-card__count">340 articoli</span>
               <span class="cat-card__arrow" aria-hidden="true">→</span>
             </a>…
           </div> */

.catalog-scroll {
  display: flex;
  gap: var(--s5);
  padding: 0 var(--gutter) var(--s6);
  overflow-x: auto;
  scroll-snap-type: x mandatory;
  scrollbar-width: thin;
  scrollbar-color: var(--c-grezzo) transparent;
  -webkit-overflow-scrolling: touch;
}

.catalog-scroll::-webkit-scrollbar { height: 4px; }
.catalog-scroll::-webkit-scrollbar-track { background: transparent; }
.catalog-scroll::-webkit-scrollbar-thumb { background: var(--c-grezzo); }

.cat-card {
  flex: 0 0 280px;
  scroll-snap-align: start;
  display: flex;
  flex-direction: column;
  gap: var(--s3);
  padding: var(--s5);
  border: 1px solid var(--c-grezzo);
  background: var(--c-bianco);
  text-decoration: none;
  color: inherit;
  min-height: 200px;
  transition:
    border-color var(--dur-fast) var(--ease-mech),
    box-shadow var(--dur-fast) var(--ease-mech);
  position: relative;
}

.cat-card:hover {
  border-color: var(--c-nero);
  box-shadow: 3px 3px 0 var(--c-nero);
}

.cat-card__label {
  font-family: var(--f-mono);
  font-size: 0.625rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--c-acciaio);
}

.cat-card__title {
  font-family: var(--f-mono);
  font-size: 1.25rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--c-nero);
  line-height: 1.2;
}

.cat-card__count {
  font-family: var(--f-mono);
  font-size: 0.6875rem;
  color: var(--c-acciaio);
  margin-top: auto;
}

.cat-card__arrow {
  position: absolute;
  bottom: var(--s5);
  right: var(--s5);
  font-size: 1.125rem;
  color: var(--c-grezzo);
  transition:
    color var(--dur-fast) var(--ease-mech),
    transform var(--dur-fast) var(--ease-mech);
}

.cat-card:hover .cat-card__arrow {
  color: var(--c-ruggine);
  transform: translateX(4px);
}

/* ── §10  Prodotti — griglia bento ─────────── */
/* Markup: <div class="product-grid">
             <article class="product-card [product-card--wide]">
               <header class="product-card__header">
                 <span class="product-card__name">VITE M12×60</span>
                 <span class="product-card__art">ART.4521</span>
               </header>
               <div class="product-card__image">
                 <img src="…" alt="…" loading="lazy">
               </div>
               <div class="product-card__body">
                 <div class="product-card__spec">
                   <span class="product-card__spec-label">Materiale</span>
                   <span class="product-card__spec-value">Acciaio zincato</span>
                 </div>…
               </div>
               <footer class="product-card__footer">
                 <span class="product-card__price">€ 0,12
                   <span class="product-card__price-unit">/ pz</span>
                 </span>
                 <a class="product-card__cta" href="…">Scheda</a>
               </footer>
             </article>…
           </div> */

.product-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--s5);
}

.product-card--wide {
  grid-column: span 2;
}

.product-card {
  background: var(--c-bianco);
  border: 1px solid var(--c-grezzo);
  display: flex;
  flex-direction: column;
  container-type: inline-size;
  transition:
    border-color var(--dur-fast) var(--ease-mech),
    box-shadow var(--dur-fast) var(--ease-mech),
    transform var(--dur-fast) var(--ease-mech);
}

.product-card:hover {
  border-color: var(--c-ruggine);
  box-shadow: 2px 2px 0 var(--c-ruggine);
  transform: translateY(-2px);
}

.product-card__header {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  padding: var(--s3) var(--s4);
  border-bottom: 1px solid var(--c-lamiera);
}

.product-card__name {
  font-family: var(--f-mono);
  font-size: 0.8125rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--c-nero);
}

.product-card__art {
  font-family: var(--f-mono);
  font-size: 0.625rem;
  color: var(--c-acciaio);
  letter-spacing: 0.08em;
}

.product-card__image {
  aspect-ratio: 4 / 3;
  background: var(--c-lamiera);
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  position: relative;
}

/* Crocino di registro quando manca l'immagine */
.product-card__image:empty::before,
.product-card__image:empty::after {
  content: '';
  position: absolute;
  background: var(--c-grezzo);
}
.product-card__image:empty::before { width: 28px; height: 1px; }
.product-card__image:empty::after  { width: 1px; height: 28px; }

.product-card__image img {
  width: 100%;
  height: 100%;
  object-fit: contain;
  padding: var(--s4);
  position: relative;
  z-index: 1;
}

.product-card__body {
  padding: var(--s3) var(--s4);
  display: flex;
  flex-direction: column;
  gap: var(--s2);
  flex: 1;
}

.product-card__spec {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: var(--s4);
}

.product-card__spec-label {
  font-family: var(--f-mono);
  font-size: 0.625rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--c-acciaio);
  flex-shrink: 0;
}

.product-card__spec-value {
  font-family: var(--f-mono);
  font-size: 0.8125rem;
  color: var(--c-nero);
  text-align: right;
}

.product-card__footer {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--s3) var(--s4);
  border-top: 1px solid var(--c-lamiera);
  margin-top: auto;
}

.product-card__price {
  font-family: var(--f-mono);
  font-size: 1.125rem;
  font-weight: 700;
  color: var(--c-nero);
}

.product-card__price-unit {
  font-size: 0.625rem;
  font-weight: 400;
  color: var(--c-acciaio);
}

.product-card__cta {
  font-family: var(--f-mono);
  font-size: 0.625rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  text-decoration: none;
  color: var(--c-ruggine);
  padding: var(--s2) var(--s4);
  border: 1px solid var(--c-ruggine);
  transition:
    background var(--dur-snap) var(--ease-mech),
    color var(--dur-snap) var(--ease-mech);
}

.product-card__cta:hover {
  background: var(--c-ruggine);
  color: var(--c-bianco);
}

/* Container query: card stretta → layout compatto */
@container (max-width: 220px) {
  .product-card__header { flex-direction: column; gap: var(--s1); }
  .product-card__spec   { flex-direction: column; gap: 0; }
}

/* ── §11  Statistiche ──────────────────────── */
/* Markup: <div class="stats">
             <div class="stat">
               <span class="stat__value" data-count-to="12400">0</span>
               <span class="stat__label">Articoli in catalogo</span>
             </div>…
           </div> */

.stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--s5);
  padding: var(--s7) 0;
}

.stat {
  text-align: center;
  padding: var(--s5);
  border: 1px solid var(--c-grezzo);
  background: var(--c-bianco);
}

.stat__value {
  font-family: var(--f-mono);
  font-size: clamp(1.75rem, 4vw, 3rem);
  font-weight: 700;
  color: var(--c-nero);
  line-height: 1;
  display: block;
  margin-bottom: var(--s2);
}

.stat__label {
  font-family: var(--f-mono);
  font-size: 0.6875rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--c-acciaio);
}

/* ── §12  Metodo ───────────────────────────── */
/* Markup: <div class="metodo">
             <div class="metodo__diagram">…SVG o CSS…</div>
             <div class="metodo__steps">
               <div class="metodo__step">
                 <span class="metodo__step-num">01</span>
                 <div>
                   <h3 class="metodo__step-title">Ritiro</h3>
                   <p class="metodo__step-desc">…</p>
                 </div>
               </div>…
             </div>
           </div> */

.metodo {
  display: grid;
  grid-template-columns: 5fr 7fr;
  gap: var(--s8);
  align-items: start;
}

.metodo__diagram {
  position: relative;
  aspect-ratio: 1;
  background: var(--c-lamiera);
  border: 1px solid var(--c-grezzo);
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}

.metodo__diagram-label {
  position: absolute;
  bottom: var(--s3);
  right: var(--s3);
  font-family: var(--f-mono);
  font-size: 0.5625rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--c-acciaio);
}

.metodo__steps {
  display: flex;
  flex-direction: column;
  gap: var(--s7);
  padding-top: var(--s4);
}

.metodo__step {
  display: grid;
  grid-template-columns: 3rem 1fr;
  gap: var(--s5);
  align-items: start;
}

.metodo__step-num {
  font-family: var(--f-mono);
  font-size: 1.75rem;
  font-weight: 700;
  color: var(--c-ruggine);
  line-height: 1;
  padding-top: var(--s1);
}

.metodo__step-title {
  font-family: var(--f-mono);
  font-size: 0.9375rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--c-nero);
  margin-bottom: var(--s2);
}

.metodo__step-desc {
  font-family: var(--f-body);
  font-size: 0.9375rem;
  line-height: 1.65;
  color: var(--c-grafite);
}

/* ── §13  CTA / Contatti ───────────────────── */
/* Markup: <section class="cta-band" id="contatti">
             <div class="cta-band__inner">
               <h2 class="cta-band__title">Hai materiale da vendere?</h2>
               <p class="cta-band__desc">…</p>
               <a class="btn-primary" href="…">Richiedi valutazione</a>
             </div>
           </section> */

.cta-band {
  position: relative;
  z-index: 1;
  background: var(--c-nero);
  color: var(--c-bianco);
}

.cta-band__inner {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: var(--s10) var(--gutter);
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  gap: var(--s5);
}

.cta-band__title {
  font-family: var(--f-mono);
  font-size: clamp(1.75rem, 5vw, 3.5rem);
  font-weight: 700;
  line-height: 1.05;
  text-transform: uppercase;
  letter-spacing: -0.01em;
}

.cta-band__desc {
  font-family: var(--f-body);
  font-size: 1.0625rem;
  line-height: 1.65;
  color: var(--c-acciaio);
  max-width: 52ch;
}

.btn-primary {
  display: inline-block;
  font-family: var(--f-mono);
  font-size: 0.8125rem;
  font-weight: 700;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  text-decoration: none;
  color: var(--c-nero);
  background: var(--c-bianco);
  padding: var(--s4) var(--s7);
  border: 2px solid var(--c-bianco);
  transition:
    background var(--dur-snap) var(--ease-mech),
    color var(--dur-snap) var(--ease-mech);
  /* Spigoli vivi — nessun border-radius */
}

.btn-primary:hover {
  background: transparent;
  color: var(--c-bianco);
}

.btn-secondary {
  display: inline-block;
  font-family: var(--f-mono);
  font-size: 0.8125rem;
  font-weight: 700;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  text-decoration: none;
  color: var(--c-nero);
  background: transparent;
  padding: var(--s4) var(--s7);
  border: 2px solid var(--c-nero);
  transition:
    background var(--dur-snap) var(--ease-mech),
    color var(--dur-snap) var(--ease-mech);
}

.btn-secondary:hover {
  background: var(--c-nero);
  color: var(--c-bianco);
}

/* ── §14  Footer ───────────────────────────── */

.footer {
  position: relative;
  z-index: 1;
  border-top: 1px solid var(--c-grezzo);
  background: var(--c-fondo);
}

.footer__inner {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: var(--s7) var(--gutter);
  display: grid;
  grid-template-columns: 2fr repeat(3, 1fr);
  gap: var(--s6);
}

.footer__brand {
  font-family: var(--f-mono);
  font-size: 1rem;
  font-weight: 700;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--c-nero);
  margin-bottom: var(--s3);
}

.footer__tagline {
  font-family: var(--f-body);
  font-size: 0.875rem;
  color: var(--c-acciaio);
  line-height: 1.5;
  max-width: 28ch;
}

.footer__col-title {
  font-family: var(--f-mono);
  font-size: 0.625rem;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--c-nero);
  margin-bottom: var(--s3);
}

.footer__links {
  display: flex;
  flex-direction: column;
  gap: var(--s2);
}

.footer__links a {
  font-family: var(--f-mono);
  font-size: 0.75rem;
  color: var(--c-acciaio);
  text-decoration: none;
  transition: color var(--dur-fast) var(--ease-mech);
}

.footer__links a:hover { color: var(--c-ruggine); }

.footer__bottom {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: var(--s4) var(--gutter);
  border-top: 1px solid var(--c-lamiera);
  font-family: var(--f-mono);
  font-size: 0.625rem;
  color: var(--c-acciaio);
  letter-spacing: 0.08em;
  display: flex;
  justify-content: space-between;
}

/* ── §15  Badge / Chip ─────────────────────── */

.badge {
  display: inline-block;
  font-family: var(--f-mono);
  font-size: 0.5625rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  padding: var(--s1) var(--s3);
  line-height: 1.4;
}

.badge--ruggine {
  background: var(--c-ruggine);
  color: var(--c-bianco);
}

.badge--ottone {
  background: color-mix(in srgb, var(--c-ottone) 15%, var(--c-bianco));
  color: var(--c-ottone);
  border: 1px solid var(--c-ottone);
}

.badge--ghisa {
  background: var(--c-ghisa);
  color: var(--c-lamiera);
}

/* ── §16  Utility ──────────────────────────── */

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.container { max-width: var(--max-w); margin: 0 auto; }

/* ── §17  Animazioni — keyframes ───────────── */

@keyframes fade-up {
  from { opacity: 0; transform: translateY(24px); }
  to   { opacity: 1; transform: translateY(0); }
}

@keyframes line-extend {
  from { transform: scaleX(0); }
  to   { transform: scaleX(1); }
}

/* ── §18  Responsive — Tablet (≤1024) ──────── */

@media (max-width: 1024px) {
  .hero {
    grid-template-columns: 1fr minmax(180px, 300px);
    gap: var(--s5) var(--s6);
  }

  .product-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .product-card--wide {
    grid-column: span 2;
  }

  .stats {
    grid-template-columns: repeat(2, 1fr);
  }

  .metodo {
    grid-template-columns: 1fr;
    gap: var(--s6);
  }

  .metodo__diagram {
    max-height: 340px;
    order: 2;
  }

  .footer__inner {
    grid-template-columns: repeat(2, 1fr);
  }
}

/* ── §19  Responsive — Mobile (≤640) ───────── */

@media (max-width: 640px) {
  body::before {
    /* Solo linee pesanti, meno rumore su piccolo schermo */
    background-size: 40px 40px, 40px 40px, 0 0, 0 0;
    opacity: 0.05;
  }

  /* Nav */
  .nav__toggle { display: block; }

  .nav__links {
    position: fixed;
    inset: 0;
    z-index: 140;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    gap: var(--s7);
    background: var(--c-fondo);
    opacity: 0;
    visibility: hidden;
    transition:
      opacity var(--dur-med) var(--ease-mech),
      visibility var(--dur-med) var(--ease-mech);
  }

  .nav.is-open .nav__links {
    opacity: 1;
    visibility: visible;
  }

  .nav.is-open .nav__link {
    font-size: 1.25rem;
  }

  /* Hero — composizione verticale propria */
  .hero {
    grid-template-columns: 1fr;
    grid-template-rows: auto auto auto;
    min-height: 100svh;
    padding-top: calc(var(--s7) + 48px);
    gap: var(--s5);
  }

  .hero__title {
    font-size: clamp(3rem, 16vw, 5.5rem);
  }

  .hero__canvas-wrap {
    grid-column: 1;
    grid-row: 2;
    max-width: 180px;
    aspect-ratio: 1;
    justify-self: end;
    margin-top: calc(-1 * var(--s6));
  }

  .hero__scroll-cue {
    grid-row: 3;
  }

  /* Categorie — snap più largo */
  .cat-card { flex: 0 0 80vw; }

  /* Prodotti — colonna singola */
  .product-grid {
    grid-template-columns: 1fr;
  }

  .product-card--wide {
    grid-column: span 1;
  }

  /* Stats */
  .stats {
    grid-template-columns: repeat(2, 1fr);
    gap: var(--s3);
  }

  .stat { padding: var(--s4); }

  /* Metodo */
  .metodo { grid-template-columns: 1fr; }
  .metodo__diagram { order: 2; max-height: 240px; }
  .metodo__step { grid-template-columns: 2.5rem 1fr; gap: var(--s3); }

  /* CTA */
  .cta-band__inner { padding: var(--s8) var(--gutter); }

  /* Footer */
  .footer__inner {
    grid-template-columns: 1fr;
    gap: var(--s5);
  }

  .footer__bottom {
    flex-direction: column;
    gap: var(--s2);
    text-align: center;
  }

  /* Section num — orizzontale su mobile */
  .section__num {
    writing-mode: horizontal-tb;
  }

  /* Section padding ridotto */
  .section__inner {
    padding: var(--s7) var(--gutter);
  }
}

/* ── §20  prefers-reduced-motion ───────────── */

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }

  .hero__canvas-wrap { display: none; }
  .hero__scroll-cue::after { animation: none; }

  /* Forza visibilità contenuto */
  .char { transform: none !important; opacity: 1 !important; }
}

/* ── §21  Focus & accessibilità ────────────── */

:focus-visible {
  outline: 2px solid var(--c-ruggine);
  outline-offset: 3px;
}

.nav__link:focus-visible {
  outline-offset: 8px;
}

.btn-primary:focus-visible,
.btn-secondary:focus-visible,
.product-card__cta:focus-visible {
  outline-offset: -5px;
  outline-width: 3px;
}

.cat-card:focus-visible {
  outline-offset: -3px;
  border-color: var(--c-ruggine);
}

/* Skip link */
.skip-link {
  position: fixed;
  top: -100%;
  left: var(--s4);
  z-index: 999;
  font-family: var(--f-mono);
  font-size: 0.75rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  padding: var(--s3) var(--s5);
  background: var(--c-ruggine);
  color: var(--c-bianco);
  text-decoration: none;
}

.skip-link:focus {
  top: var(--s4);
}

/* ── §22  Stampa ───────────────────────────── */

@media print {
  body::before,
  .nav,
  .progress,
  .hero__canvas-wrap,
  .hero__scroll-cue,
  .nav__toggle,
  .footer { display: none !important; }

  body {
    background: white;
    color: black;
    font-size: 10pt;
    line-height: 1.5;
  }

  .hero { min-height: auto; padding: 0; }
  .section__inner { padding: 0.8cm 0; }
  .section { break-inside: avoid; }

  .product-card { break-inside: avoid; border: 0.5pt solid #999; }

  a[href]::after {
    content: " (" attr(href) ")";
    font-size: 0.8em;
    color: #666;
  }
}

/* Rete di sicurezza: se il browser non supporta le animazioni allo scorrimento,
   o se il JavaScript non parte, nulla deve restare invisibile. */
@supports not (animation-timeline: view()) {
  [class*="reveal"], .section__body, .product-card, .metodo__step {
    opacity: 1 !important; transform: none !important; clip-path: none !important;
  }
}
[hidden] { display: none !important; }
.scheletro .product-card__image { animation: batte 1.4s ease-in-out infinite; }
.scheletro .barra { height: 10px; background: var(--c-grezzo); margin: .4rem 0; animation: batte 1.4s ease-in-out infinite; }
.scheletro .barra.corta { width: 45%; }
@keyframes batte { 0%,100% { opacity: 1 } 50% { opacity: .4 } }
.vuoto, .fine { grid-column: 1/-1; padding: 3rem 1rem; text-align: center; color: var(--c-acciaio); }
.vuoto strong { display: block; color: var(--c-nero); font-size: 1.05rem; margin-bottom: .35rem; }
.cerca { margin-bottom: 1.6rem; max-width: 460px; }
.cerca input { width: 100%; font: inherit; padding: .75rem .95rem; color: var(--c-nero);
  background: var(--c-bianco); border: 1px solid var(--c-grezzo); border-radius: 0; }
.cerca input:focus { outline: 0; border-color: var(--c-ruggine); box-shadow: inset 0 -2px 0 var(--c-ruggine); }
.ancora { display: block; margin: 1.6rem auto 0; }

/* Il titolo non puo' sparire. `.char-wrap` taglia cio' che esce: se l'animazione
   dei caratteri non gira, senza questa regola il titolo resta invisibile. */
@supports not (animation-timeline: view()) { .char-wrap { overflow: visible; } }
html:not(.gsap-attivo) .char-wrap { overflow: visible; }
html:not(.gsap-attivo) .char { transform: none !important; opacity: 1 !important; }

/* Nascosto agli occhi, presente per i lettori di schermo. Diverso da .skip-link,
   che invece deve diventare visibile quando riceve il fuoco. */
.solo-lettori {
  position: absolute; width: 1px; height: 1px;
  padding: 0; margin: -1px; overflow: hidden;
  clip: rect(0 0 0 0); white-space: nowrap; border: 0;
}

/* ── Correzioni responsive ────────────────────────────────────────────
   Sul telefono il contenuto usciva dallo schermo a destra: la hero era
   ancora impaginata su due colonne e il canvas non aveva un limite.     */
html, body { overflow-x: hidden; max-width: 100%; }

@media (max-width: 900px) {
  .hero {
    display: block;
    padding-inline: clamp(1.1rem, 5vw, 2rem);
  }
  .hero__content { max-width: 100%; }
  .hero__title { font-size: clamp(3rem, 17vw, 5.5rem); }
  .hero__subtitle,
  .hero__desc { max-width: 100%; overflow-wrap: break-word; }
  .hero__canvas-wrap {
    position: static;
    width: 100%;
    max-width: 100%;
    aspect-ratio: 4 / 3;
    margin-top: 2rem;
  }
  .hero__canvas-wrap canvas { width: 100% !important; height: 100% !important; }
  .nav__toggle { display: inline-flex; }
  .section__inner { padding-inline: clamp(1.1rem, 5vw, 2rem); }
  .section__title { font-size: clamp(1.8rem, 9vw, 2.6rem); }
  .dim-divider { padding-inline: 1rem; }
}

/* nessun elemento puo' sforare la larghezza dello schermo */
.hero__content > *, .section__body > *, .product-card, .cat-card { max-width: 100%; }
img, canvas, svg { max-width: 100%; }

/* La fascia delle categorie deve scorrere DENTRO di se: senza questo, le schede
   allargano l'intera pagina e su telefono tutto il resto risulta tagliato.
   Misurato: .cat-card larga 400px portava il documento a 849px su schermo da 390. */
.catalog-scroll {
  display: flex;
  gap: 1px;
  overflow-x: auto;
  overscroll-behavior-x: contain;
  scroll-snap-type: x proximity;
  -webkit-overflow-scrolling: touch;
  max-width: 100%;
  padding-bottom: .5rem;
}
.catalog-scroll > .cat-card {
  flex: 0 0 auto;
  width: clamp(190px, 62vw, 260px);
  scroll-snap-align: start;
}
.catalog-scroll::-webkit-scrollbar { height: 3px; }
.catalog-scroll::-webkit-scrollbar-thumb { background: var(--c-grezzo); }

/* Un elemento flex o grid non scende sotto la larghezza del suo contenuto se non
   gli si dice min-width:0. Senza questa riga lungo tutta la catena, `overflow-x`
   sul contenitore delle categorie non taglia niente e la pagina resta larga. */
.section, .section__inner, .section__body, .catalog-scroll { min-width: 0; }
.section__body > * { min-width: 0; }

/* Il pezzo 3D non deve mai sovrapporsi al testo: su schermi stretti scende sotto
   e prende tutta la larghezza, con un'aria attorno che lo faccia leggere. */
.hero__canvas-wrap { position: relative; z-index: 0; }
.hero__content { position: relative; z-index: 1; }
@media (max-width: 900px) {
  .hero__canvas-wrap {
    margin: 2.5rem auto 0;
    width: min(100%, 420px);
    aspect-ratio: 1 / 1;
  }
}

/* ── Sforamento orizzontale: causa individuata ──────────────────────────
   `.hero` usa `grid-template-columns: 1fr minmax(240px, 400px)`. Quel minimo
   rigido di 240px, sommato alla prima colonna e al vuoto fra le due, supera la
   larghezza di un telefono: la griglia si allarga e porta fuori schermo tutto il
   contenuto. Sotto i 900px la hero diventa a colonna singola, senza minimi. */
@media (max-width: 900px) {
  .hero {
    display: block !important;
    grid-template-columns: none !important;
    max-width: 100% !important;
    padding-inline: clamp(1.1rem, 5vw, 2rem) !important;
  }
  .hero__content { width: 100%; max-width: 100%; }
  .hero__subtitle {
    letter-spacing: .08em;          /* la spaziatura ampia allargava troppo */
    overflow-wrap: anywhere;
  }
  .hero__desc { overflow-wrap: break-word; hyphens: auto; }
}

/* `44ch` sembra prudente ma su schermo stretto puo' superare la larghezza utile:
   il carattere di riferimento e' piu' largo del previsto. Sotto i 900px il limite
   va espresso rispetto allo schermo, non ai caratteri. */
@media (max-width: 900px) {
  .hero__desc, .hero__subtitle, .lede, .cta-band__desc, .metodo__step-desc {
    max-width: calc(100vw - 2.4rem) !important;
    box-sizing: border-box;
  }
}

/* La card e' un link: senza questo eredita il sottolineato e il colore dei link */
a.product-card { text-decoration: none; color: inherit; display: flex; }
a.product-card:focus-visible { outline: 2px solid var(--c-ruggine); outline-offset: 2px; }