/* ============================================================
   layout.css — struttura generale del tema
   ------------------------------------------------------------
   Contiene: container, header + navigazione, breadcrumb,
   hero di pagina, sezioni, griglie, layout a colonne,
   footer, pulsante "torna su".
   ============================================================ */

/* -------------------------- container ---------------------- */

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

.container--narrow {
  max-width: var(--container-narrow-max);
}

.container--text {
  max-width: var(--container-text-max);
}

/* --------------------------- sezioni ----------------------- */

.section {
  padding-block: var(--space-section);
}

.section--alt {
  background: var(--color-bg-alt);
}

.section--accent {
  background: var(--color-accent-deep);
  color: var(--color-on-accent);
}

.section--accent h1,
.section--accent h2,
.section--accent h3,
.section--accent strong {
  color: var(--color-on-accent);
}

.section--accent a:not(.button) {
  color: var(--color-surface-dark-link);
}

.section--compact {
  padding-block: var(--space-8);
}

.section--topless {
  padding-top: 0;
}

.section-heading {
  max-width: var(--container-narrow-max);
  margin-bottom: var(--space-8);
}

.section-heading--centered {
  margin-inline: auto;
  text-align: center;
}

.section-heading__eyebrow,
.eyebrow {
  display: inline-block;
  margin: 0 0 var(--space-3);
  font-family: var(--font-family);
  font-size: var(--text-xs);
  font-weight: var(--font-weight-semibold);
  letter-spacing: var(--tracking-wider);
  text-transform: uppercase;
  color: var(--color-accent);
}

.section-heading__title {
  margin-bottom: var(--space-4);
  max-width: 24em;
}

.section-heading--centered .section-heading__title {
  margin-inline: auto;
}

.section-heading__lede {
  max-width: 42em;
  font-size: var(--text-lg);
  color: var(--color-text-muted);
}

.section-heading--centered .section-heading__lede {
  margin-inline: auto;
}

/* --------------------------- griglie ----------------------- */

.grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-gap);
}

@media (min-width: 768px) {
  .grid--2 {
    grid-template-columns: repeat(2, 1fr);
  }

  .grid--3 {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 1024px) {
  .grid--3 {
    grid-template-columns: repeat(3, 1fr);
  }

  .grid--4 {
    grid-template-columns: repeat(4, 1fr);
  }

  .grid--2-1 {
    grid-template-columns: 2fr 1fr;
  }

  .grid--1-2 {
    grid-template-columns: 1fr 2fr;
  }
}

.grid--tight {
  gap: var(--space-4);
}

/* Layout articolo: colonna principale + barra laterale */
.sidebar-layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-8);
}

@media (min-width: 1024px) {
  .sidebar-layout {
    grid-template-columns: minmax(0, 1fr) 20rem;
  }
}

/* ---------------------------- hero ------------------------- */

.page-hero {
  padding-block: clamp(2.5rem, 5vw, 4.5rem) var(--space-section);
  background:
    radial-gradient(880px 340px at 90% -40%, var(--color-accent-soft) 0%, var(--color-accent-transparent) 68%),
    linear-gradient(180deg, var(--color-bg-alt) 0%, var(--color-bg) 100%);
  border-bottom: 1px solid var(--color-border);
}

.page-hero__title {
  max-width: 16em;
  margin-bottom: var(--space-5);
  line-height: var(--leading-tight);
}

.page-hero__lede {
  max-width: 38em;
  font-size: var(--text-lg);
  color: var(--color-text-muted);
}

.page-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-4);
  margin-top: var(--space-6);
}

/* --------------------------- header ------------------------ */

.site-header {
  position: sticky;
  top: 0;
  z-index: var(--z-header);
  background: var(--color-header-surface);
  border-bottom: 1px solid var(--color-border);
  box-shadow: var(--shadow-sm);
}

.site-header__inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
  min-height: var(--header-height);
}

.site-header__brand {
  display: inline-flex;
  align-items: center;
  gap: var(--space-3);
  text-decoration: none;
  color: var(--color-ink);
  font-family: var(--font-family);
  font-weight: var(--font-weight-bold);
  font-size: var(--text-lg);
  letter-spacing: var(--tracking-tight);
  min-width: 0;
  max-width: calc(100% - 60px);
}

.site-header__brand:hover {
  color: var(--color-ink);
}

.site-header__logo {
  display: block;
  width: 13rem;
  height: 4rem;
  max-width: 100%;
  object-fit: contain;
  object-position: center;
  flex-shrink: 1;
}

.site-header__cta.button {
  flex-shrink: 0;
  display: none;
}

@media (min-width: 1024px) {
  .site-header__cta.button {
    display: inline-flex;
  }

  .site-header__brand {
    max-width: none;
  }
}

/* Navigazione principale.
   Comportamento "no-js": la navigazione è sempre visibile.
   Con JavaScript (html.js) la navigazione mobile è collassata
   e viene aperta dal pulsante toggle.                    */
.site-header__nav {
  display: block;
  flex-basis: 100%;
  order: 3;
  width: 100%;
}

html.js .site-header__nav {
  display: none;
}

html.js .site-header__nav.is-open {
  display: block;
}

@media (min-width: 1024px) {
  html.js .site-header__nav,
  html.js .site-header__nav.is-open {
    display: flex;
    align-items: center;
    gap: var(--space-3);
  }

  .site-header__inner {
    flex-wrap: nowrap;
  }

  .site-header__nav {
    flex-basis: auto;
    order: initial;
    width: auto;
    margin-left: auto;
  }
}

/* Lista di primo livello */
.nav-list {
  list-style: none;
  margin: 0;
  padding: var(--space-4) 0;
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
}

@media (min-width: 1024px) {
  .nav-list {
    flex-direction: row;
    align-items: center;
    gap: var(--space-1);
    padding: 0;
  }
}

.nav-list__item {
  margin: 0;
  position: relative;
}

.nav-list__link {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-2) var(--space-3);
  border-radius: var(--radius-md);
  font-weight: var(--font-weight-medium);
  color: var(--color-text);
  text-decoration: none;
  font-size: var(--text-base);
  min-height: 44px;
}

.nav-list__link:hover,
.nav-list__link:focus-visible {
  color: var(--color-accent-deep);
  background: var(--color-bg-elevated);
}

.nav-list__link--active,
.nav-list__link[aria-current="page"],
.nav-list__sublink[aria-current="page"] {
  color: var(--color-accent-deep);
  background: var(--color-accent-soft);
  font-weight: var(--font-weight-semibold);
}

.nav-list__link:active,
.nav-list__sublink:active {
  color: var(--color-accent-deep);
  background: var(--color-accent-soft);
}

.nav-list__parent-row {
  display: flex;
  align-items: center;
  min-height: 44px;
}

.nav-list__parent-row .nav-list__link {
  flex: 1;
}

.nav-list__submenu-toggle {
  display: none;
  align-items: center;
  justify-content: center;
  flex: 0 0 44px;
  width: 44px;
  height: 44px;
  padding: 0;
  border: 0;
  border-radius: var(--radius-md);
  background: transparent;
  color: var(--color-text);
  cursor: pointer;
}

html.js .nav-list__submenu-toggle {
  display: inline-flex;
}

.nav-list__submenu-toggle:hover,
.nav-list__submenu-toggle:focus-visible {
  color: var(--color-accent-deep);
  background: var(--color-bg-elevated);
}

.nav-list__submenu-toggle > span {
  width: 0.5rem;
  height: 0.5rem;
  border-right: 2px solid currentColor;
  border-bottom: 2px solid currentColor;
  transform: rotate(45deg) translateY(-2px);
  transition: transform var(--transition-fast);
}

.nav-list__submenu-toggle[aria-expanded="true"] > span {
  transform: rotate(225deg) translate(-2px, -2px);
}

/* Sottomenu: visibile senza JS; con JS è accordion mobile */
.nav-list__submenu {
  list-style: none;
  margin: 0;
  padding: var(--space-1) 0 0 var(--space-4);
  display: block;
}

html.js .nav-list__submenu {
  display: none;
}

html.js .nav-list__submenu.is-open {
  display: block;
}

.nav-list__sublink {
  display: flex;
  align-items: center;
  padding: var(--space-2) var(--space-3);
  border-radius: var(--radius-md);
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  text-decoration: none;
  min-height: 44px;
}

.nav-list__sublink:hover,
.nav-list__sublink:focus-visible {
  color: var(--color-accent-deep);
  background: var(--color-bg-elevated);
}

@media (min-width: 1024px) {
  .nav-list__submenu,
  html.js .nav-list__submenu,
  html.js .nav-list__submenu.is-open {
    display: block;
    position: absolute;
    top: 100%;
    left: 0;
    min-width: 17.5rem;
    padding: var(--space-2);
    background: var(--color-bg);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
    opacity: 0;
    visibility: hidden;
    transform: translateY(4px);
    transition: opacity var(--transition-fast), transform var(--transition-fast);
  }

  .nav-list__item:hover > .nav-list__submenu,
  .nav-list__item:focus-within > .nav-list__submenu,
  .nav-list__submenu.is-open {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
  }

  .nav-list__sublink {
    padding: var(--space-2) var(--space-3);
    white-space: nowrap;
  }
}

/* Pulsante toggle menu mobile */
.site-header__toggle {
  display: none;
  flex-shrink: 0;
  width: 44px;
  height: 44px;
  padding: 0;
  border: 1px solid var(--color-border-strong);
  border-radius: var(--radius-md);
  background: var(--color-bg);
  cursor: pointer;
  align-items: center;
  justify-content: center;
}

html.js .site-header__toggle {
  display: inline-flex;
}

@media (min-width: 1024px) {
  html.js .site-header__toggle {
    display: none;
  }
}

.site-header__toggle-icon,
.site-header__toggle-icon::before,
.site-header__toggle-icon::after {
  display: block;
  width: 18px;
  height: 2px;
  background: var(--color-ink);
  border-radius: var(--radius-full);
  content: "";
  transition: transform var(--transition-fast);
}

.site-header__toggle-icon {
  position: relative;
}

.site-header__toggle-icon::before,
.site-header__toggle-icon::after {
  position: absolute;
  top: 0;
  left: 0;
}

.site-header__toggle-icon::before {
  transform: translateY(-6px);
}

.site-header__toggle-icon::after {
  transform: translateY(6px);
}

.site-header__toggle[aria-expanded="true"] .site-header__toggle-icon {
  background: transparent;
}

.site-header__toggle[aria-expanded="true"] .site-header__toggle-icon::before {
  transform: translateY(0) rotate(45deg);
}

.site-header__toggle[aria-expanded="true"] .site-header__toggle-icon::after {
  transform: translateY(0) rotate(-45deg);
}

/* ------------------------- breadcrumb ---------------------- */

.breadcrumb {
  padding-block: var(--space-4);
  border-bottom: 1px solid var(--color-border);
  background: var(--color-bg);
}

.breadcrumb__list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-2);
  list-style: none;
  margin: 0;
  padding: 0;
  font-size: var(--text-sm);
  color: var(--color-text-muted);
}

.breadcrumb__item {
  margin: 0;
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
}

.breadcrumb__item + .breadcrumb__item::before {
  content: "/";
  color: var(--color-text-faint);
  font-family: var(--font-family);
}

.breadcrumb__link {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  color: var(--color-text-muted);
  text-decoration: none;
}

.breadcrumb__link:hover {
  color: var(--color-accent-deep);
  text-decoration: underline;
}

.breadcrumb__item--current {
  color: var(--color-ink);
  font-weight: var(--font-weight-medium);
}

@media (max-width: 600px) {
  .breadcrumb {
    padding-block: var(--space-2);
  }

  .breadcrumb__list {
    gap: var(--space-1);
  }

  .breadcrumb__item {
    gap: var(--space-1);
  }

  .breadcrumb__item:not(:first-child):not(:last-child) {
    display: none;
  }
}

/* ------------------------- testo lungo --------------------- */

.prose {
  font-size: var(--text-lg);
  line-height: var(--leading-relaxed);
  max-width: 70ch;
}

.prose h2 {
  margin-top: var(--space-9);
  margin-bottom: var(--space-4);
}

.prose h3 {
  margin-top: var(--space-7);
  margin-bottom: var(--space-3);
}

.prose ul,
.prose ol {
  margin-bottom: var(--space-5);
}

.prose > p:first-child {
  color: var(--color-text);
}

/* Il primo elemento deve condividere la linea superiore della colonna
   adiacente; gli heading interni mantengono invece il ritmo editoriale. */
.prose > :first-child {
  margin-top: 0;
}

/* --------------------------- footer ------------------------ */

.site-footer {
  --color-focus-ring: var(--color-surface-dark-link);
  background: var(--color-footer-bg);
  color: var(--color-surface-dark-text-muted);
  padding-block: var(--space-9) var(--space-6);
  font-size: var(--text-sm);
}

.site-footer a {
  display: inline-flex;
  align-items: center;
  min-height: 36px;
  color: var(--color-surface-dark-heading);
  text-decoration: none;
}

.site-footer a:hover {
  color: var(--color-on-accent);
  text-decoration: underline;
}

.site-footer__top {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: var(--space-7) var(--space-5);
  padding-bottom: var(--space-8);
  border-bottom: 1px solid var(--color-surface-dark-overlay);
}

.site-footer__col--brand,
.site-footer__col--contact {
  grid-column: 1 / -1;
}

@media (min-width: 768px) {
  .site-footer__top {
    grid-template-columns: 1fr 1fr;
  }

  .site-footer__col--brand,
  .site-footer__col--contact {
    grid-column: auto;
  }
}

@media (min-width: 1024px) {
  .site-footer__top {
    grid-template-columns: 2fr 1fr 1fr 1.2fr;
  }
}

.site-footer__name {
  margin: 0 0 var(--space-2);
  color: var(--color-on-accent);
  font-size: var(--text-lg);
  font-weight: var(--font-weight-bold);
}

.site-footer__tagline {
  color: var(--color-surface-dark-faint);
  max-width: 30em;
}

.site-footer__identity {
  min-height: 64px;
}

.site-footer__identity .site-footer__tagline {
  margin-bottom: 0;
}

.site-footer__address {
  margin: 0 0 var(--space-2);
  color: var(--color-surface-dark-faint);
  font-style: normal;
  line-height: var(--leading-normal);
}

.public-data--link[aria-disabled="true"] {
  pointer-events: none;
}

.public-data--inline:empty {
  display: inline-block;
  min-width: 9em;
  min-height: 1em;
  vertical-align: text-bottom;
}

.site-footer__title {
  margin: 0 0 var(--space-4);
  color: var(--color-on-accent);
  font-family: var(--font-family);
  font-size: var(--text-base);
  font-weight: var(--font-weight-semibold);
  letter-spacing: var(--tracking-tight);
}

.site-footer__list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.site-footer__list li {
  margin-bottom: 0;
}

.site-footer__list li:last-child {
  margin-bottom: 0;
}

.site-footer__contact {
  display: flex;
  flex-direction: column;
  gap: 0;
  margin: 0;
  padding: 0;
  list-style: none;
}

.site-footer__bottom {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
  padding-top: var(--space-6);
  color: var(--color-surface-dark-faint);
}

.site-footer__copyright {
  min-height: 1.5em;
}

.site-footer__legal {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-4);
  list-style: none;
  margin: 0;
  padding: 0;
}

.site-footer__legal li {
  margin: 0;
}

@media (max-width: 767px) {
  .site-footer {
    padding-block: var(--space-8) var(--space-5);
  }

  .site-footer__top {
    padding-bottom: var(--space-6);
  }

  .site-footer__bottom {
    padding-top: var(--space-5);
  }

  .site-footer a {
    min-height: 44px;
  }
}

/* ------------------------- torna su ------------------------ */

.back-to-top {
  position: fixed;
  right: var(--space-5);
  bottom: var(--space-5);
  z-index: var(--z-back-to-top);
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-4);
  border: 1px solid var(--color-border-strong);
  border-radius: var(--radius-full);
  background: var(--color-bg);
  color: var(--color-ink);
  font-size: var(--text-sm);
  font-weight: var(--font-weight-medium);
  text-decoration: none;
  box-shadow: var(--shadow-md);
  opacity: 0;
  visibility: hidden;
  transform: translateY(8px);
  transition: opacity var(--transition-base), transform var(--transition-base);
}

.back-to-top.is-visible {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.back-to-top:hover {
  color: var(--color-accent-deep);
}

.back-to-top__icon {
  width: 1rem;
  height: 1rem;
}