/* =========================================================
   H2EUPower – foglio di stile unico
   Valori di tipografia e spazi ripresi dal sito Webflow originale,
   con gli stessi breakpoint: 991px (tablet), 767px (mobile orizzontale), 479px (mobile).
   ========================================================= */

/* ---------- Token ---------- */
:root {
  /* Colori del brand */
  --color-purple: #564b99;
  --color-cyan: #2c87c9;
  --color-cyan-text: #155a8c;           /* azzurro scurito: contrasto ≥ 4.5:1 anche sui fondi lilla e grigio */
  --color-tint: #d9d4ff;                /* lilla del cambio colore di sfondo durante lo scroll */

  /* Neutri */
  --color-text: #333436;
  --color-text-muted: #4c4c4f;
  --color-white: #fff;
  --color-surface-alt: #e4e7ed;         /* fondo sezione contatti */
  --color-field: #d5dbe3;               /* fondo campi del form e menu mobile */
  --color-field-light: #eff5fd;         /* fondo del sottomenu Products aperto nel menu mobile */
  --color-border: rgb(19 12 61 / 28%);
  --color-line: rgb(0 0 0 / 20%);

  /* Stati */
  --color-success: #027a48;
  --color-error: #b42318;

  /* Font */
  --font-body: "Figtree", system-ui, sans-serif;
  --font-display: "Syne", "Figtree", system-ui, sans-serif;

  /* Scala tipografica (desktop) */
  --fs-display: 3.5rem;
  --fs-h2: 3rem;
  --fs-h4: 2rem;
  --fs-lg: 1.5rem;
  --fs-md: 1.125rem;
  --fs-base: 1rem;
  --fs-sm: 0.875rem;

  /* Spazi (desktop) */
  --gutter: 5%;
  --container: 80rem;
  --space-section: 7rem;
  --space-section-lg: 10rem;
  --space-intro: 5rem;
  --space-title: 7rem;
  --space-cols: 4rem;
  --space-card: 3rem;

  /* Elementi */
  --radius: 4px;
  --radius-lg: 8px;
  --shadow-header: 0 20px 24px -4px rgb(0 0 0 / 16%), 0 8px 8px -4px rgb(0 0 0 / 6%);
  --ease-in-out-quad: cubic-bezier(0.45, 0, 0.55, 1);
  --ease-in-out-quint: cubic-bezier(0.83, 0, 0.17, 1);
  --ease-out-quart: cubic-bezier(0.25, 1, 0.5, 1);

  /* Aggiornata da JS con l'altezza reale dell'header */
  --header-h: 6.5rem;
}

@media (max-width: 991px) {
  :root {
    --fs-display: 3rem;
    --fs-h2: 2.625rem;
    --fs-h4: 1.75rem;
    --space-section: 6rem;
    --space-section-lg: 7.5rem;
    --space-intro: 4.5rem;
    --space-title: 6rem;
    --space-card: 2rem;
  }
}

@media (max-width: 767px) {
  :root {
    --fs-display: 2.2rem;
    --fs-h2: 2rem;
    --fs-h4: 1.5rem;
    --fs-lg: 1.125rem;
    --fs-md: 1rem;
    --space-section: 4rem;
    --space-section-lg: 5rem;
    --space-intro: 3rem;
    --space-title: 4rem;
    --space-cols: 1.25rem;
    --space-card: 1.5rem;
  }
}

@media (max-width: 479px) {
  :root {
    --fs-display: 1.8rem;
    --fs-h2: 1.6rem;
    --fs-h4: 1.4rem;
  }
}

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

html {
  -webkit-text-size-adjust: 100%;
  text-size-adjust: 100%;
  scroll-padding-top: var(--header-h);
}

body {
  margin: 0;
  background-color: var(--page-bg, var(--color-white));
  color: var(--color-text);
  font-family: var(--font-body);
  font-size: var(--fs-base);
  line-height: 1.6;
  font-variant-numeric: lining-nums;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

h1, h2, h3, h4, p, ul, figure {
  margin: 0;
}

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

img {
  height: auto;
}

a {
  color: inherit;
}

button,
input,
textarea {
  font: inherit;
  color: inherit;
}

:focus-visible {
  outline: 2px solid var(--color-purple);
  outline-offset: 2px;
}

address {
  font-style: normal;
}

/* ---------- Utility ---------- */
.visually-hidden {
  position: absolute !important;
  width: 1px;
  height: 1px;
  margin: -1px;
  padding: 0;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
  border: 0;
}

.skip-link {
  position: fixed;
  top: 0.5rem;
  left: 0.5rem;
  z-index: 2000;
  padding: 0.75rem 1rem;
  background: var(--color-purple);
  color: var(--color-white);
  border-radius: var(--radius);
  text-decoration: none;
  transform: translateY(-200%);
}

.skip-link:focus {
  transform: none;
}

.container {
  width: 100%;
  max-width: var(--container);
  margin-inline: auto;
}

.text-md {
  font-size: var(--fs-md);
}

.stack {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.two-cols {
  display: flex;
  gap: var(--space-cols);
}

.two-cols > * {
  flex: 1;
}

@media (max-width: 767px) {
  .two-cols {
    flex-direction: column;
  }
}

/* ---------- Titoli ---------- */
.hero__title,
.about__title,
.section-title,
.title-lg,
.contacts__title,
.product-card__title {
  font-family: var(--font-display);
  font-weight: 700;
  color: var(--color-purple);
}

.section-title,
.contacts__title,
.product-card__title {
  font-size: var(--fs-h2);
  line-height: 1.15;
}

.title-lg {
  font-size: var(--fs-h2);
  line-height: 1.2;
}

.eyebrow {
  color: var(--color-cyan-text);
  font-weight: 600;
}

/* ---------- Pulsante ---------- */
.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 250px;
  max-width: 100%;
  padding: 0.75rem 1.5rem;
  border: 0;
  border-radius: var(--radius);
  background-color: var(--color-purple);
  color: var(--color-white);
  font-weight: 500;
  text-align: center;
  text-decoration: none;
  cursor: pointer;
  transition: transform 0.3s var(--ease-in-out-quad);
}

@media (hover: hover) {
  .button:hover {
    transform: scale(1.1);
  }
}

@media (max-width: 479px) {
  .button {
    width: 100%;
  }
}

/* =========================================================
   Header e navigazione
   ========================================================= */
.site-header {
  position: fixed;
  inset: 0 0 auto;
  z-index: 1000;
  display: flex;
  align-items: center;
  min-height: 4.5rem;
  padding-inline: var(--gutter);
  background-color: var(--color-white);
  box-shadow: var(--shadow-header);
}

.site-header__inner {
  display: grid;
  grid-template-columns: 0.375fr 1fr 0.375fr;
  align-items: center;
  gap: 1rem;
  width: 100%;
  padding-block: 2.3vh;
}

.site-header__logo {
  justify-self: start;
}

.site-header__logo img {
  width: 150px;
}

.site-nav {
  justify-self: center;
}

.site-nav__list {
  display: flex;
  align-items: center;
  padding: 0;
  list-style: none;
}

.site-nav__link {
  display: block;
  padding: 0.5rem 1rem;
  color: var(--color-text);
  font-weight: 500;
  text-decoration: none;
  white-space: nowrap;
  transition: transform 0.3s var(--ease-in-out-quad), color 0.2s;
}

.site-nav__link[aria-current="true"] {
  color: var(--color-purple);
}

/* Link del sottomenu: evidenziati in viola al passaggio del mouse e con la tastiera */
.site-nav__link--sub {
  border-radius: var(--radius);
  transition: background-color 0.2s, color 0.2s;
}

.site-nav__link--sub:focus-visible {
  background-color: var(--color-purple);
  color: var(--color-white);
}

@media (hover: hover) {
  .site-nav__link:not(.site-nav__link--sub):hover {
    transform: translateY(-4px);
  }

  .site-nav__link--sub:hover {
    background-color: var(--color-purple);
    color: var(--color-white);
  }
}

/* Voce "Products" con sottomenu: link alla sezione + pulsante che apre l'elenco */
.site-nav__item--sub {
  position: relative;
}

.site-nav__split {
  display: flex;
  align-items: center;
}

.site-nav__split .site-nav__link {
  padding-right: 0.25rem;
}

.site-nav__sub-toggle {
  display: grid;
  place-items: center;
  width: 2rem;
  height: 2rem;
  padding: 0;
  border: 0;
  border-radius: var(--radius);
  background: none;
  color: var(--color-text);
  cursor: pointer;
}

.site-nav__sub-toggle svg {
  transition: transform 0.3s var(--ease-in-out-quad);
}

.site-nav__item--sub.is-open .site-nav__sub-toggle svg {
  transform: rotate(180deg);
}

.site-nav__sub {
  display: none;
  padding: 0.25rem 0;
  list-style: none;
}

.site-nav__item--sub.is-open .site-nav__sub {
  display: block;
}

/* Desktop: sottomenu a tendina, si apre anche al passaggio del mouse */
@media (min-width: 992px) {
  .site-nav__sub {
    position: absolute;
    top: 100%;
    left: 0;
    min-width: 100%;
    padding: 0.375rem;
    background-color: var(--color-white);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
  }
}

@media (min-width: 992px) and (hover: hover) {
  .site-nav__item--sub:hover .site-nav__sub {
    display: block;
  }

  /* La freccia si gira anche quando la tendina si apre al passaggio del mouse */
  .site-nav__item--sub:hover .site-nav__sub-toggle svg {
    transform: rotate(180deg);
  }
}

/* Pulsante hamburger (visibile solo sotto i 992px) */
.menu-button {
  display: none;
}

@media (max-width: 991px) {
  .site-header__inner {
    display: flex;
    justify-content: space-between;
  }

  .menu-button {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 6px;
    width: 48px;
    height: 48px;
    margin-right: -0.5rem;
    padding: 0;
    border: 0;
    background: none;
    cursor: pointer;
  }

  .menu-button__line {
    width: 24px;
    height: 2px;
    background-color: var(--color-text);
    transition: transform 0.4s var(--ease-in-out-quint), opacity 0.4s var(--ease-in-out-quint);
  }

  .site-header.is-menu-open .menu-button__line:nth-child(2) {
    transform: translateY(8px) rotate(45deg);
  }

  .site-header.is-menu-open .menu-button__line:nth-child(3) {
    opacity: 0;
  }

  .site-header.is-menu-open .menu-button__line:nth-child(4) {
    transform: translateY(-8px) rotate(-45deg);
  }

  .site-nav {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    justify-self: stretch;
    display: none;
    height: calc(100dvh - var(--header-h));
    padding: 1rem 0 6.5rem;
    overflow: auto;
    overscroll-behavior: contain;
    background-color: var(--color-field);
    border-bottom: 1px solid var(--color-text);
  }

  .site-header.is-menu-open .site-nav {
    display: block;
    animation: nav-in 0.4s ease both;
  }

  .site-nav__list {
    flex-direction: column;
    align-items: stretch;
  }

  .site-nav__link {
    padding: 0.75rem 0;
    font-size: 1.125rem;
    text-align: center;
  }

  .site-nav__split {
    justify-content: center;
  }

  .site-nav__split .site-nav__link {
    padding-right: 0;
  }

  .site-nav__sub-toggle {
    width: 2.75rem;
    height: 2.75rem;
  }

  /* Sottomenu Products aperto: fondo più chiaro, da bordo a bordo */
  .site-nav__item--sub.is-open {
    background-color: var(--color-field-light);
  }

  .site-nav__link--sub {
    padding-block: 0.5rem;
    border-radius: 0;
    font-size: 1rem;
  }
}

@media (max-width: 767px) {
  .site-header {
    min-height: 4rem;
  }

  .site-nav {
    padding-bottom: 6rem;
  }
}

@keyframes nav-in {
  from {
    opacity: 0;
    transform: translateY(-1rem);
  }
}

/* =========================================================
   Hero
   ========================================================= */
.hero {
  position: relative;
  isolation: isolate;
  display: grid;
  place-items: center;
  min-height: 100svh;
  padding: var(--space-section) var(--gutter);
  color: var(--color-white);
  text-align: center;
}

.hero__media {
  position: absolute;
  inset: 0;
  z-index: -1;
  background-color: #000;
}

.hero__video {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

/* Velo scuro sopra il video, per la leggibilità del testo bianco */
.hero__media::after {
  content: "";
  position: absolute;
  inset: 0;
  background-color: rgb(0 0 0 / 50%);
}

.hero__content {
  max-height: 60rem;
}

.hero__title {
  color: var(--color-white);
  font-size: 3.5rem;
  line-height: 1.3;
}

.hero__subtitle {
  font-family: var(--font-display);
  font-size: var(--fs-lg);
  font-weight: 700;
  line-height: 2.2;
}

/* =========================================================
   Chi siamo: mission, vision, value
   ========================================================= */
.about {
  position: relative;
  padding: calc(var(--space-section) + 3rem) var(--gutter) var(--space-section);
  overflow: clip;
}

/* Animazione decorativa che scorre a destra, dietro al testo */
.about__decor {
  position: absolute;
  inset: 0 0 0 auto;
  z-index: 0;
  pointer-events: none;
}

.about__decor-track {
  padding-top: 70vh;
  will-change: transform;
}

.about__lottie {
  width: 50vw;
  aspect-ratio: 1;
  opacity: 0.5;
}

@media (max-width: 991px) {
  .about__lottie {
    width: 70vw;
    margin-left: -8vw;
  }
}

@media (max-width: 479px) {
  .about__lottie {
    width: 100vw;
    margin-left: -20vw;
  }
}

.about__content {
  position: relative;
  z-index: 1;
  max-width: var(--container);
  margin-inline: auto;
}

@media (max-width: 991px) {
  .about__content {
    max-width: 84vw;
  }
}

@media (max-width: 767px) {
  .about__content {
    max-width: none;
  }
}

.about__title {
  margin-bottom: var(--space-title);
  font-size: var(--fs-display);
  line-height: 1.15;
  text-align: center;
  text-wrap: balance;
}

.value {
  padding-top: var(--space-section-lg);
}

.value__title {
  margin-bottom: 3rem;
}

.value__col {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.value__item {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.value__item-title {
  font-size: var(--fs-lg);
  font-weight: 600;
  line-height: 1.4;
}

@media (max-width: 767px) {
  .value__title {
    margin-bottom: 2rem;
  }
}

/* =========================================================
   Prodotti
   ========================================================= */
.products {
  padding-inline: var(--gutter);
}

.product-group {
  padding-top: var(--space-section);
}

.section-intro {
  max-width: 48rem;
  margin: 0 auto var(--space-intro);
  text-align: center;
}

.section-intro .section-title {
  margin-bottom: 1.5rem;
}

.section-intro .eyebrow {
  margin-bottom: 1rem;
}

.section-intro .text-md + .text-md {
  margin-top: 1em;
}

/* Pila di card: ogni card resta agganciata in alto e la successiva la copre */
.product-stack {
  display: grid;
}

.product-card {
  position: sticky;
  top: 10%;
  display: grid;
  grid-template-columns: 1fr 1fr;
  align-items: center;
  margin-bottom: 10vh;
  overflow: hidden;
  background-color: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  transform: scale(var(--card-scale, 1));
}

.product-card__media {
  display: flex;
  align-items: center;
  justify-content: center;
}

.product-card--reverse .product-card__media {
  order: 2;
}

.product-card__body {
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: var(--space-card);
}

.product-card__head {
  display: flex;
  align-items: baseline;
  flex-wrap: wrap;
  gap: 1rem;
  margin-bottom: 1.5rem;
}

.product-card__title {
  letter-spacing: -0.01em;
}

.product-card__title--long {
  font-size: var(--fs-h4);
  line-height: 1.25;
}

.product-card__power {
  font-size: var(--fs-md);
  font-weight: 800;
}

.spec-list {
  padding-left: 1rem;
}

.spec-list li {
  margin-block: 0.25rem;
  padding-left: 0.5rem;
}

.product-card__cta {
  margin-top: 2rem;
}

.product-card__cta-label {
  margin-bottom: 1rem;
  font-size: var(--fs-md);
  font-weight: 600;
}

@media (max-width: 767px) {
  .product-stack {
    gap: 1.5rem;
  }

  /* Su mobile niente effetto pila: card una sotto l'altra, immagine sempre in alto */
  .product-card {
    position: static;
    grid-template-columns: 1fr;
    margin-bottom: 0;
    transform: none;
  }

  .product-card--reverse .product-card__media {
    order: 0;
  }

  .section-intro .section-title {
    margin-bottom: 1.25rem;
  }

  .section-intro .eyebrow {
    margin-bottom: 0.75rem;
  }
}

/* =========================================================
   Press
   ========================================================= */
.press {
  padding: var(--space-section-lg) var(--gutter);
}

.press .section-intro {
  margin-bottom: 3rem;
}

.press__actions {
  display: flex;
  justify-content: center;
}

@media (max-width: 767px) {
  .press .section-intro {
    margin-bottom: 2rem;
  }
}

/* =========================================================
   Contatti
   ========================================================= */
.contacts {
  padding: var(--space-section) var(--gutter) 4rem;
  background-color: var(--color-surface-alt);
}

.contacts__grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  align-items: start;
  gap: 4rem 5rem;
}

.contacts__title {
  margin-bottom: 1.5rem;
}

.contact-card {
  margin-top: 1.5rem;
}

.contact-card__name {
  font-size: var(--fs-md);
  font-weight: 600;
}

.contact-card__links {
  padding: 0;
  list-style: none;
}

.contact-card__links a {
  display: inline-block;
  padding-block: 0.25rem;
  text-decoration: underline;
  text-underline-offset: 0.15em;
}

.contact-card__links a:hover {
  color: var(--color-purple);
}

@media (max-width: 991px) {
  .contacts__grid {
    column-gap: 3rem;
  }
}

@media (max-width: 767px) {
  .contacts__grid {
    grid-template-columns: 1fr;
    row-gap: 3rem;
  }
}

/* ---------- Form ---------- */
.contact-form {
  display: grid;
  gap: 1.5rem;
}

.field {
  display: flex;
  flex-direction: column;
}

.field__label {
  margin-bottom: 0.5rem;
}

.field__input {
  min-height: 2.75rem;
  padding: 0.5rem 0.75rem;
  border: 1px solid var(--color-border);
  border-radius: 0;
  background-color: var(--color-field);
  color: var(--color-text);
}

.field__input:hover,
.field__input:focus {
  border-color: var(--color-text);
}

.field__input--textarea {
  min-height: 11.25rem;
  padding-block: 0.75rem;
  resize: vertical;
}

.field--checkbox {
  display: grid;
  grid-template-columns: auto 1fr;
  align-items: start;
  column-gap: 0.75rem;
  font-size: var(--fs-sm);
}

.checkbox {
  width: 1.125rem;
  height: 1.125rem;
  margin: 0.15rem 0 0;
  accent-color: var(--color-purple);
  cursor: pointer;
}

.field--checkbox .field__error {
  grid-column: 1 / -1;
}

/* Errori mostrati solo dopo che l'utente ha interagito con il campo (o ha provato a inviare) */
.field__error {
  display: none;
  margin-top: 0.375rem;
  color: var(--color-error);
  font-size: var(--fs-sm);
  font-weight: 500;
}

.field__input:user-invalid,
.field__input.is-invalid {
  border-color: var(--color-error);
  background-color: #fef3f2;
}

.field__input:user-invalid ~ .field__error,
.field__input.is-invalid ~ .field__error,
.checkbox:user-invalid ~ .field__error,
.checkbox.is-invalid ~ .field__error {
  display: block;
}

.contact-form__submit {
  justify-self: start;
}

.contact-form__submit[disabled] {
  opacity: 0.7;
  cursor: progress;
}

.form-status {
  padding: 1.5rem;
  border-radius: var(--radius);
  color: var(--color-white);
  font-size: 1.25rem;
  font-weight: 600;
}

.form-status.is-success {
  background-color: var(--color-success);
}

.form-status.is-error {
  background-color: var(--color-error);
}

/* =========================================================
   Footer
   ========================================================= */
.site-footer {
  padding: 0 var(--gutter) var(--space-section);
  background-color: var(--color-surface-alt);
  font-size: var(--fs-sm);
}

.site-footer__line {
  height: 1px;
  margin: 0 0 4rem;
  border: 0;
  background-color: var(--color-line);
}

.site-footer__grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.5rem 5rem;
}

@media (max-width: 767px) {
  .site-footer__line {
    margin-bottom: 3rem;
  }

  .site-footer__grid {
    grid-template-columns: 1fr;
  }
}

/* =========================================================
   Pagina 404
   ========================================================= */
.not-found {
  display: grid;
  place-content: center;
  justify-items: center;
  gap: 1.5rem;
  min-height: 100svh;
  padding: var(--space-section) var(--gutter);
  text-align: center;
}

/* =========================================================
   Animazioni
   Solo se l'utente non ha chiesto di ridurre il movimento.
   Senza JS i contenuti restano sempre visibili.
   ========================================================= */
@media (prefers-reduced-motion: no-preference) {
  /* Comparsa con ingrandimento */
  .js .reveal {
    opacity: 0;
    transform: scale(0.75);
    transition: opacity 1s var(--ease-out-quart), transform 1s var(--ease-out-quart);
  }

  .js .reveal.is-visible {
    opacity: 1;
    transform: none;
  }

  /* Breve cambio di tinta dei titoli quando entrano in vista */
  .js .glow.is-visible,
  .js .is-visible .glow {
    animation: glow 0.7s ease-in-out;
  }
}

@keyframes glow {
  50% {
    filter: hue-rotate(180deg);
  }
}

/* Movimento ridotto: durate quasi azzerate, gli eventi di fine animazione continuano ad arrivare */
@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;
  }
}