/* ==========================================================================
   Base: reset, tipografia, layout, accessibilità
   ========================================================================== */

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

html {
  -webkit-text-size-adjust: 100%;
  text-size-adjust: 100%;
  scroll-padding-top: calc(var(--header-h) + var(--space-5));
}

@media (prefers-reduced-motion: no-preference) {
  html { scroll-behavior: smooth; }
}

body {
  margin: 0;
  min-height: 100vh;
  background: var(--c-paper);
  color: var(--c-ink);
  font-family: var(--font-text);
  font-size: var(--fs-body);
  font-weight: var(--fw-regular);
  line-height: var(--lh-body);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
}

body.is-locked {
  overflow: hidden;
}

h1, h2, h3, h4, p, ul, ol, figure, blockquote, dl, dd {
  margin: 0;
}

ul[role="list"],
ol[role="list"] {
  list-style: none;
  padding: 0;
}

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

img {
  height: auto;
}

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

button {
  font: inherit;
  color: inherit;
  background: none;
  border: 0;
  padding: 0;
  cursor: pointer;
}

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

/* --- Tipografia ---------------------------------------------------------- */

.t-display,
.t-h2,
.t-h2-xl,
.t-h3,
.t-callout {
  font-family: var(--font-display);
  font-weight: var(--fw-medium);
  text-wrap: balance;
  font-kerning: normal;
}

.t-display {
  font-size: var(--fs-display);
  line-height: var(--lh-tight);
  letter-spacing: var(--tracking-display);
}

.t-h2 {
  font-size: var(--fs-h2);
  line-height: var(--lh-heading);
  letter-spacing: var(--tracking-heading);
}

.t-h2-xl {
  font-size: var(--fs-h2-xl);
  line-height: 1.08;
  letter-spacing: var(--tracking-display);
}

.t-h3 {
  font-size: var(--fs-h3);
  font-weight: var(--fw-semibold);
  line-height: 1.25;
  letter-spacing: -0.012em;
}

.t-callout {
  font-size: var(--fs-callout);
  line-height: 1.22;
  letter-spacing: var(--tracking-heading);
}

.t-lead {
  font-size: var(--fs-lead);
  line-height: 1.55;
  letter-spacing: -0.006em;
}

.t-small {
  font-size: var(--fs-small);
  line-height: 1.55;
}

.t-muted {
  color: var(--c-ink-muted);
}

.prose {
  max-width: var(--measure);
  text-wrap: pretty;
}

.prose > * + * {
  margin-top: 1.1em;
}

/* Label maiuscola: eyebrow, AREA / FASE, piccole denominazioni */
.label {
  font-family: var(--font-text);
  font-size: var(--fs-label);
  font-weight: var(--fw-semibold);
  line-height: 1.4;
  letter-spacing: var(--tracking-label);
  text-transform: uppercase;
}

/* Eyebrow: punto rosa (dal simbolo) + label */
.eyebrow {
  display: flex;
  align-items: flex-start;
  gap: 0.75em;
  color: var(--c-ink);
}

/* il punto resta allineato alla prima riga anche quando l'eyebrow va a capo */
.eyebrow::before {
  content: "";
  flex: none;
  width: 6px;
  height: 6px;
  margin-top: calc(0.7em - 3px);
  border-radius: 50%;
  background: var(--c-accent);
}

/* Numerazione editoriale */
.num {
  font-family: var(--font-display);
  font-weight: var(--fw-medium);
  font-size: var(--fs-num);
  line-height: 1;
  letter-spacing: -0.02em;
  font-variant-numeric: tabular-nums lining-nums;
  color: var(--c-accent);
}

/* --- Layout -------------------------------------------------------------- */

.container {
  width: 100%;
  max-width: calc(var(--container) + 2 * var(--gutter));
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.grid {
  display: grid;
  grid-template-columns: repeat(var(--cols, 4), minmax(0, 1fr));
  column-gap: var(--col-gap);
}

@media (min-width: 48em) {
  .grid { --cols: 12; }
}

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

/* Apertura di sezione: filetto forte + eyebrow */
.section-head {
  border-top: var(--rule) solid var(--c-rule-strong);
  padding-top: var(--space-5);
}

.section-head > .eyebrow + * {
  margin-top: var(--section-head-gap);
}

.section--alt {
  background: var(--c-paper-alt);
}

.section--dark {
  background: var(--c-dark);
  color: var(--c-on-dark);
}

.section--dark .section-head {
  border-top-color: var(--c-rule-on-dark);
}

.section--dark .eyebrow {
  color: var(--c-on-dark);
}

/* --- Accessibilità ------------------------------------------------------- */

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

.skip-link {
  position: fixed;
  top: var(--space-3);
  left: var(--space-3);
  z-index: 100;
  padding: var(--space-3) var(--space-4);
  background: var(--c-ink);
  color: var(--c-paper);
  font-size: var(--fs-small);
  font-weight: var(--fw-medium);
  border-radius: var(--radius);
  transform: translateY(-200%);
}

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

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

/* il contenuto principale riceve il focus dallo skip link: niente cornice */
main:focus {
  outline: none;
}

.section--dark :focus-visible,
.site-footer :focus-visible {
  outline-color: var(--c-on-dark);
}

/* --- Motion: reveal leggero ---------------------------------------------
   Attivo solo con JS e senza preferenza di movimento ridotto:
   senza JS il contenuto è sempre visibile. */

@media (prefers-reduced-motion: no-preference) {
  .js [data-reveal] {
    opacity: 0;
    transform: translate3d(0, 12px, 0);
    transition:
      opacity var(--dur-reveal) var(--ease-out),
      transform var(--dur-reveal) var(--ease-out);
    transition-delay: calc(var(--reveal-i, 0) * 70ms);
  }

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