/* =====================================================================
   Caseificio De Meis Pietro Eredi — Supino (FR)
   Concept: "Montagna e pietra" — dark, cinematografico, materico.
   Palette: ardesia, oro caldo, pietra, off-white.
   ===================================================================== */

:root {
  --slate-900: #1E2428;
  --slate-850: #232B30;
  --slate-800: #2C353B;
  --slate-700: #384249;
  --gold: #C9A24B;
  --gold-soft: #d8b976;
  --stone: #B9B2A6;
  --stone-dim: #8b857b;
  --offwhite: #F3EFE7;
  --ink: #14181B;

  --maxw: 1200px;
  --gutter: clamp(1.15rem, 4vw, 2.75rem);
  --radius: 4px;
  --radius-lg: 10px;

  --font-display: "Anton", "Oswald", Impact, sans-serif;
  --font-head: "Oswald", "Arial Narrow", sans-serif;
  --font-serif: "Source Serif 4", Georgia, "Times New Roman", serif;

  --ease: cubic-bezier(.22, .61, .36, 1);
}

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

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

body {
  margin: 0;
  background: var(--slate-900);
  color: var(--offwhite);
  font-family: var(--font-serif);
  font-size: clamp(1rem, 0.96rem + 0.25vw, 1.12rem);
  line-height: 1.7;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

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

a { color: inherit; text-decoration: none; }

h1, h2, h3, h4 {
  margin: 0;
  font-family: var(--font-head);
  font-weight: 600;
  line-height: 1.02;
  letter-spacing: .01em;
  text-transform: uppercase;
}

h1 em, h2 em, h3 em {
  font-family: var(--font-serif);
  font-style: italic;
  font-weight: 500;
  text-transform: none;
  color: var(--gold);
  letter-spacing: 0;
}

p { margin: 0 0 1.1em; }

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

::selection { background: var(--gold); color: var(--ink); }

/* ---------- Layout helpers ---------- */
.container {
  width: 100%;
  max-width: var(--maxw);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.section { position: relative; padding: clamp(3.5rem, 9vw, 7.5rem) 0; }

.eyebrow {
  font-family: var(--font-head);
  text-transform: uppercase;
  letter-spacing: .32em;
  font-size: .74rem;
  font-weight: 500;
  color: var(--gold);
  margin: 0 0 1.1rem;
}
.eyebrow-dark { color: var(--gold); }

.section-lead {
  font-size: clamp(1.05rem, 1rem + 0.4vw, 1.28rem);
  color: var(--stone);
  max-width: 46ch;
}

.section-head { max-width: 720px; }
.section-head.center { margin-inline: auto; text-align: center; }
.section-head.center .section-lead { margin-inline: auto; }

.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  z-index: 1000;
  background: var(--gold);
  color: var(--ink);
  padding: .7rem 1.1rem;
  font-family: var(--font-head);
  text-transform: uppercase;
  letter-spacing: .08em;
}
.skip-link:focus { left: 1rem; top: 1rem; }

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: .5rem;
  font-family: var(--font-head);
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: .12em;
  font-size: .92rem;
  padding: .95rem 1.7rem;
  border-radius: var(--radius);
  border: 1.5px solid transparent;
  cursor: pointer;
  transition: transform .35s var(--ease), background-color .3s, color .3s, border-color .3s;
  will-change: transform;
}
.btn:hover { transform: translateY(-3px); }
.btn:active { transform: translateY(-1px); }

.btn-primary { background: var(--gold); color: var(--ink); }
.btn-primary:hover { background: var(--gold-soft); }

.btn-ghost {
  background: transparent;
  color: var(--offwhite);
  border-color: rgba(243,239,231,.4);
}
.btn-ghost:hover { border-color: var(--gold); color: var(--gold); }

.btn-outline {
  background: transparent;
  color: var(--gold);
  border-color: var(--gold);
}
.btn-outline:hover { background: var(--gold); color: var(--ink); }

.btn-block { display: flex; width: 100%; }

/* =====================================================================
   HEADER / NAV
   ===================================================================== */
.site-header {
  position: fixed;
  inset: 0 0 auto 0;
  z-index: 100;
  transition: background-color .4s var(--ease), backdrop-filter .4s, border-color .4s;
  border-bottom: 1px solid transparent;
}
.site-header.scrolled {
  background: rgba(23, 28, 31, .82);
  backdrop-filter: blur(12px);
  border-bottom-color: rgba(201,162,75,.18);
}

.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  min-height: 76px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: .7rem;
  color: var(--offwhite);
}
.brand-mark {
  width: 42px;
  height: 42px;
  color: var(--gold);
  flex: none;
}
.brand-word { display: flex; flex-direction: column; line-height: 1; }
.brand-name {
  font-family: var(--font-display);
  font-size: 1.5rem;
  letter-spacing: .04em;
  text-transform: uppercase;
}
.brand-sub {
  font-family: var(--font-head);
  font-size: .64rem;
  letter-spacing: .2em;
  text-transform: uppercase;
  color: var(--stone-dim);
  margin-top: .28rem;
}

/* nav list */
.main-nav { display: flex; align-items: center; }
.nav-list {
  display: flex;
  align-items: center;
  gap: clamp(1.1rem, 2.5vw, 2.2rem);
  list-style: none;
  margin: 0;
  padding: 0;
}
.nav-list a {
  font-family: var(--font-head);
  text-transform: uppercase;
  letter-spacing: .12em;
  font-size: .9rem;
  color: var(--offwhite);
  position: relative;
  padding: .35rem 0;
  transition: color .3s;
}
.nav-list a:not(.nav-cta)::after {
  content: "";
  position: absolute;
  left: 0; bottom: -2px;
  width: 100%; height: 1.5px;
  background: var(--gold);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform .35s var(--ease);
}
.nav-list a:not(.nav-cta):hover { color: var(--gold); }
.nav-list a:not(.nav-cta):hover::after { transform: scaleX(1); }

.nav-cta {
  border: 1.5px solid var(--gold);
  color: var(--gold);
  padding: .55rem 1.15rem !important;
  border-radius: var(--radius);
  transition: background-color .3s, color .3s;
}
.nav-cta:hover { background: var(--gold); color: var(--ink); }

/* hamburger */
.nav-toggle {
  display: none;
  width: 46px; height: 46px;
  background: transparent;
  border: 1px solid rgba(243,239,231,.25);
  border-radius: var(--radius);
  cursor: pointer;
  padding: 0;
  position: relative;
}
.nav-toggle span {
  position: absolute;
  left: 50%; top: 50%;
  width: 22px; height: 2px;
  background: var(--offwhite);
  transform: translate(-50%, -50%);
  transition: transform .35s var(--ease), opacity .25s;
}
.nav-toggle span:nth-child(1) { transform: translate(-50%, -8px); }
.nav-toggle span:nth-child(3) { transform: translate(-50%, 8px); }
.nav-toggle[aria-expanded="true"] span:nth-child(1) { transform: translate(-50%, 0) rotate(45deg); }
.nav-toggle[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
.nav-toggle[aria-expanded="true"] span:nth-child(3) { transform: translate(-50%, 0) rotate(-45deg); }

/* =====================================================================
   HERO
   ===================================================================== */
.hero {
  position: relative;
  min-height: 100svh;
  display: flex;
  align-items: flex-end;
  padding-bottom: clamp(4rem, 10vh, 8rem);
  overflow: hidden;
  isolation: isolate;
}
.hero-bg {
  position: absolute;
  inset: -12% 0 -12% 0;
  z-index: -3;
  will-change: transform;
}
.hero-bg img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
}
.hero-scrim {
  position: absolute;
  inset: 0;
  z-index: -2;
  background:
    linear-gradient(180deg, rgba(20,24,27,.55) 0%, rgba(20,24,27,.15) 30%, rgba(20,24,27,.72) 78%, var(--slate-900) 100%);
}
.hero-vignette {
  position: absolute;
  inset: 0;
  z-index: -1;
  background: radial-gradient(120% 90% at 50% 40%, transparent 40%, rgba(15,18,21,.7) 100%);
  pointer-events: none;
}

.hero-content { position: relative; max-width: 860px; }
.hero .eyebrow { color: var(--gold-soft); }
.hero h1 {
  font-family: var(--font-display);
  font-size: clamp(2.8rem, 8.5vw, 6.6rem);
  line-height: .96;
  letter-spacing: .005em;
  margin: 0 0 1.3rem;
  text-shadow: 0 12px 40px rgba(0,0,0,.45);
}
.hero h1 em { display: inline-block; }
.hero-sub {
  max-width: 54ch;
  font-size: clamp(1.05rem, 1rem + 0.45vw, 1.32rem);
  color: var(--stone);
}
.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: .9rem;
  margin-top: 2rem;
}

.scroll-cue {
  position: absolute;
  left: 50%; bottom: 1.5rem;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: .6rem;
  font-family: var(--font-head);
  text-transform: uppercase;
  letter-spacing: .28em;
  font-size: .66rem;
  color: var(--stone);
  z-index: 2;
}
.scroll-line {
  width: 1.5px; height: 46px;
  background: linear-gradient(var(--gold), transparent);
  animation: cueSlide 2.2s var(--ease) infinite;
}
@keyframes cueSlide {
  0% { transform: scaleY(0); transform-origin: top; }
  40% { transform: scaleY(1); transform-origin: top; }
  60% { transform: scaleY(1); transform-origin: bottom; }
  100% { transform: scaleY(0); transform-origin: bottom; }
}

/* ---------- Running strip ---------- */
.hero-strip {
  background: var(--gold);
  color: var(--ink);
  overflow: hidden;
  border-block: 1px solid rgba(20,24,27,.25);
  padding: .75rem 0;
}
.hero-strip-track {
  display: flex;
  align-items: center;
  gap: 1.5rem;
  width: max-content;
  animation: marquee 32s linear infinite;
  font-family: var(--font-head);
  text-transform: uppercase;
  letter-spacing: .16em;
  font-size: .92rem;
  font-weight: 500;
  white-space: nowrap;
}
.hero-strip-track .dot { color: var(--slate-800); font-size: .7rem; }
@keyframes marquee {
  from { transform: translate3d(0,0,0); }
  to { transform: translate3d(-50%,0,0); }
}

/* =====================================================================
   GROTTA · SCROLL ORIZZONTALE PINNATO
   ===================================================================== */
.grotta {
  position: relative;
  background:
    radial-gradient(90% 60% at 50% 0%, var(--slate-800), var(--slate-900) 70%);
}
.grotta-sticky { overflow: hidden; }
.grotta-track {
  display: flex;
  flex-direction: column;
  gap: 0;
}
.grotta-panel {
  padding: clamp(3rem, 8vw, 6rem) var(--gutter);
}

.grotta-intro-inner { max-width: 640px; margin-inline: auto; text-align: center; }
.grotta-intro h2 {
  font-size: clamp(2.2rem, 6vw, 4.4rem);
  margin: .3rem 0 1.1rem;
}
.grotta-hint {
  margin-top: 1.6rem;
  font-family: var(--font-head);
  text-transform: uppercase;
  letter-spacing: .16em;
  font-size: .82rem;
  color: var(--gold);
}
.grotta-hint-arrow { display: inline-block; margin-right: .35rem; }

/* card */
.card {
  display: flex;
  flex-direction: column;
  max-width: 560px;
  margin-inline: auto;
}
.card-media {
  position: relative;
  border-radius: var(--radius-lg);
  overflow: hidden;
  aspect-ratio: 4 / 3;
  box-shadow: 0 30px 60px -30px rgba(0,0,0,.75);
}
.card-media img {
  width: 100%; height: 100%;
  object-fit: cover;
  transition: transform 1.1s var(--ease);
}
.card:hover .card-media img { transform: scale(1.06); }
.card-media::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, transparent 55%, rgba(15,18,21,.55));
}
.card-index {
  position: absolute;
  left: 1rem; top: .7rem;
  z-index: 2;
  font-family: var(--font-display);
  font-size: 1.6rem;
  color: var(--gold);
  letter-spacing: .05em;
  text-shadow: 0 2px 12px rgba(0,0,0,.6);
}
.card-body { padding: 1.5rem .3rem 0; }
.card-body h3 {
  font-size: clamp(1.5rem, 3vw, 2.1rem);
  margin-bottom: .6rem;
}
.card-body p { color: var(--stone); margin: 0; }

/* =====================================================================
   TERRITORIO — split con zoom parallax
   ===================================================================== */
.split {
  display: grid;
  gap: clamp(2rem, 5vw, 4.5rem);
  align-items: center;
}
.split-media {
  position: relative;
  border-radius: var(--radius-lg);
  overflow: hidden;
  aspect-ratio: 3 / 2;
  box-shadow: 0 40px 80px -40px rgba(0,0,0,.8);
}
.split-media img {
  width: 100%; height: 116%;
  object-fit: cover;
  will-change: transform;
}
.media-frame {
  position: absolute;
  inset: 12px;
  border: 1px solid rgba(201,162,75,.5);
  border-radius: 6px;
  pointer-events: none;
  z-index: 2;
}
.territorio h2 {
  font-size: clamp(2.2rem, 5.5vw, 3.9rem);
  margin-bottom: 1.3rem;
}
.split-text p { color: var(--stone); }

.marks { list-style: none; margin: 2rem 0 0; padding: 0; display: grid; gap: 1.1rem; }
.marks li { display: flex; gap: 1rem; align-items: flex-start; }
.mark-dot {
  flex: none;
  width: 12px; height: 12px;
  margin-top: .55rem;
  border-radius: 50%;
  border: 2px solid var(--gold);
  position: relative;
}
.mark-dot::after {
  content: "";
  position: absolute; inset: 3px;
  border-radius: 50%;
  background: var(--gold);
}
.marks strong {
  display: block;
  font-family: var(--font-head);
  text-transform: uppercase;
  letter-spacing: .06em;
  font-weight: 600;
  color: var(--offwhite);
  font-size: 1.02rem;
}
.marks div { color: var(--stone); line-height: 1.5; }

/* =====================================================================
   AZIENDA
   ===================================================================== */
.azienda {
  background: var(--ink);
  overflow: hidden;
}
.azienda-bg {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(60% 50% at 15% 0%, rgba(201,162,75,.12), transparent 60%),
    radial-gradient(50% 60% at 90% 100%, rgba(201,162,75,.08), transparent 60%);
  pointer-events: none;
}
.azienda .container { position: relative; z-index: 1; }
.azienda h2 {
  font-size: clamp(2.1rem, 5vw, 3.6rem);
  margin: .3rem 0 1.1rem;
}

.values {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1px;
  margin-top: clamp(2.5rem, 6vw, 4rem);
  background: rgba(201,162,75,.16);
  border: 1px solid rgba(201,162,75,.16);
  border-radius: var(--radius-lg);
  overflow: hidden;
}
.value {
  background: var(--slate-900);
  padding: clamp(1.8rem, 4vw, 2.6rem);
  transition: background-color .4s var(--ease);
}
.value:hover { background: var(--slate-800); }
.value-num {
  font-family: var(--font-display);
  font-size: 1.5rem;
  color: var(--gold);
  letter-spacing: .1em;
}
.value h3 {
  font-size: 1.4rem;
  margin: .7rem 0 .5rem;
}
.value p { color: var(--stone); margin: 0; font-size: .98rem; line-height: 1.55; }

/* =====================================================================
   CONTATTI
   ===================================================================== */
.contatti { background: var(--slate-900); }
.contatti h2 {
  font-size: clamp(2.1rem, 5vw, 3.6rem);
  margin: .3rem 0 1.1rem;
}
.contatti-split { align-items: start; }

.contact-list { list-style: none; margin: 1.8rem 0; padding: 0; display: grid; gap: 1.2rem; }
.contact-list li { display: flex; flex-direction: column; gap: .2rem; }
.c-label {
  font-family: var(--font-head);
  text-transform: uppercase;
  letter-spacing: .18em;
  font-size: .7rem;
  color: var(--stone-dim);
}
.contact-list a, .contact-list li > span:not(.c-label) {
  font-size: 1.1rem;
  color: var(--offwhite);
}
.contact-list a { transition: color .3s; }
.contact-list a:hover { color: var(--gold); }

.map-embed {
  margin-top: 1.8rem;
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid rgba(201,162,75,.2);
  line-height: 0;
}
.map-embed iframe {
  width: 100%;
  height: 300px;
  border: 0;
  filter: grayscale(.35) contrast(1.05) brightness(.9);
}

/* form */
.contatti-form {
  background: var(--slate-800);
  border: 1px solid rgba(201,162,75,.16);
  border-radius: var(--radius-lg);
  padding: clamp(1.6rem, 4vw, 2.6rem);
}
.form-note {
  margin: 0 0 1.2rem;
  padding: .85rem 1rem;
  border-radius: var(--radius);
  font-family: var(--font-serif);
  font-size: .95rem;
  display: none;
}
.form-note.is-visible { display: block; }
.form-note.ok {
  background: rgba(201,162,75,.15);
  color: var(--gold-soft);
  border: 1px solid rgba(201,162,75,.4);
}
.form-note.err {
  background: rgba(200,80,60,.14);
  color: #e8a798;
  border: 1px solid rgba(200,80,60,.4);
}

.field { margin-bottom: 1.2rem; }
.field label {
  display: block;
  font-family: var(--font-head);
  text-transform: uppercase;
  letter-spacing: .12em;
  font-size: .74rem;
  color: var(--stone);
  margin-bottom: .5rem;
}
.field input, .field textarea {
  width: 100%;
  background: var(--slate-900);
  border: 1px solid var(--slate-700);
  border-radius: var(--radius);
  color: var(--offwhite);
  font-family: var(--font-serif);
  font-size: 1rem;
  padding: .85rem 1rem;
  transition: border-color .3s, box-shadow .3s;
}
.field textarea { resize: vertical; min-height: 120px; }
.field input:focus, .field textarea:focus {
  outline: none;
  border-color: var(--gold);
  box-shadow: 0 0 0 3px rgba(201,162,75,.18);
}
.field input::placeholder, .field textarea::placeholder { color: var(--stone-dim); }

.hp { position: absolute; left: -9999px; width: 1px; height: 1px; overflow: hidden; }

/* =====================================================================
   FOOTER
   ===================================================================== */
.site-footer {
  background: var(--ink);
  border-top: 1px solid rgba(201,162,75,.16);
  padding-top: clamp(3rem, 7vw, 5rem);
}
.footer-inner {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2.2rem;
  padding-bottom: 2.5rem;
}
.footer-brand p { color: var(--stone-dim); max-width: 40ch; margin-top: 1rem; }
.brand-footer .brand-mark { width: 38px; height: 38px; }
.footer-col h4 {
  font-size: 1rem;
  letter-spacing: .1em;
  color: var(--gold);
  margin-bottom: .8rem;
}
.footer-col p { color: var(--stone); line-height: 1.7; margin: 0; }
.footer-col a { transition: color .3s; }
.footer-col a:hover { color: var(--gold); }

.footer-bottom {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: .5rem;
  padding-block: 1.5rem;
  border-top: 1px solid rgba(243,239,231,.08);
  font-size: .84rem;
  color: var(--stone-dim);
}
.footer-bottom p { margin: 0; }
.footer-bottom .credit {
  font-family: var(--font-head);
  text-transform: uppercase;
  letter-spacing: .16em;
  font-size: .72rem;
}

/* =====================================================================
   REVEAL (IntersectionObserver)
   ===================================================================== */
.reveal {
  opacity: 0;
  transform: translateY(34px);
  transition: opacity .9s var(--ease), transform .9s var(--ease);
  will-change: opacity, transform;
}
.reveal.in { opacity: 1; transform: none; }

/* =====================================================================
   RESPONSIVE — tablet / desktop up
   ===================================================================== */
@media (min-width: 720px) {
  .footer-inner { grid-template-columns: 1.6fr 1fr 1fr; }
  .values { grid-template-columns: repeat(2, 1fr); }
}

@media (min-width: 861px) {
  .split { grid-template-columns: 1.05fr 1fr; }
  .contatti-split { grid-template-columns: 1fr 1fr; }
  .values { grid-template-columns: repeat(4, 1fr); }

  /* ---- Horizontal scroll ATTIVO (classe aggiunta via JS) ---- */
  .grotta.is-pinned .grotta-sticky {
    position: sticky;
    top: 0;
    height: 100vh;
    display: flex;
    align-items: center;
  }
  .grotta.is-pinned .grotta-track {
    flex-direction: row;
    height: 100vh;
    align-items: center;
    gap: clamp(2rem, 5vw, 5rem);
    padding-inline: clamp(2rem, 6vw, 6rem);
    will-change: transform;
  }
  .grotta.is-pinned .grotta-panel {
    flex: 0 0 auto;
    padding: 0;
    display: flex;
    align-items: center;
  }
  .grotta.is-pinned .grotta-intro { width: min(46vw, 620px); }
  .grotta.is-pinned .grotta-intro-inner { text-align: left; margin: 0; }
  .grotta.is-pinned .card { width: min(42vw, 520px); max-width: none; }
}

/* =====================================================================
   MOBILE NAV + fallback verticale grotta
   ===================================================================== */
@media (max-width: 860px) {
  .nav-toggle { display: block; }
  .nav-list {
    position: fixed;
    inset: 0 0 0 auto;
    width: min(82vw, 340px);
    flex-direction: column;
    align-items: flex-start;
    justify-content: center;
    gap: 1.6rem;
    padding: 2rem clamp(1.5rem, 6vw, 2.5rem);
    background: var(--slate-800);
    border-left: 1px solid rgba(201,162,75,.2);
    transform: translateX(100%);
    transition: transform .45s var(--ease);
    box-shadow: -30px 0 60px rgba(0,0,0,.5);
  }
  .nav-list.open { transform: translateX(0); }
  .nav-list a { font-size: 1.25rem; }
  .nav-cta { display: inline-block; }

  .hero { align-items: center; padding-top: 90px; }

  /* la grotta resta uno stack verticale (nessun pin su mobile) */
  .grotta-track { gap: 2.5rem; padding-bottom: clamp(3rem, 8vw, 5rem); }
  .card-body { padding-inline: 0; }
}

/* =====================================================================
   REDUCED MOTION — tutto statico
   ===================================================================== */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: .001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .001ms !important;
  }
  .reveal { opacity: 1 !important; transform: none !important; }
  .hero-bg, .split-media img { transform: none !important; }
  .hero-strip-track { animation: none; }
  .scroll-line { animation: none; }
  .grotta.is-pinned .grotta-sticky { position: static; height: auto; }
  .grotta.is-pinned .grotta-track { flex-direction: column; height: auto; transform: none !important; }
}