/* ============================================================
   BASE — reset, tipografia, superfici del browser, griglia
   ============================================================ */

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

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--header-h) + 1.5rem);
}

body {
  margin: 0;
  background: var(--color-bg);
  color: var(--color-text);
  font-family: var(--font-sans);
  font-size: var(--text-base);
  line-height: var(--leading-body);
  font-weight: 400;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  font-variant-numeric: tabular-nums;
  overflow-x: hidden;
}

body.is-locked { overflow: hidden; }

img, picture, svg, video { display: block; max-width: 100%; }
img { height: auto; background-color: var(--color-bg-alt); }

button, input, select, textarea { font: inherit; color: inherit; }
button { background: none; border: none; padding: 0; cursor: pointer; }

/* ---------- Superfici del browser --------------------------
   Selezione, caret, scrollbar, focus, underline: nessuna resta
   al default di sistema.                                      */
::selection {
  background: var(--color-selection);
  color: var(--color-text);
}
:root { scrollbar-color: var(--color-border) var(--color-bg); }
::-webkit-scrollbar { width: 11px; height: 11px; }
::-webkit-scrollbar-track { background: var(--color-bg); }
::-webkit-scrollbar-thumb {
  background: var(--color-border);
  border: 3px solid var(--color-bg);
  border-radius: 99px;
}
::-webkit-scrollbar-thumb:hover { background: #C6BAA6; }

input, textarea, select { caret-color: var(--color-accent); }

:focus { outline: none; }
:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 3px;
}
.on-deep :focus-visible,
.lightbox :focus-visible { outline-color: var(--color-accent-on-deep); }

a {
  color: inherit;
  text-decoration-color: var(--color-border);
  text-underline-offset: 0.22em;
  text-decoration-thickness: 1px;
}

/* ---------- Tipografia -------------------------------------- */
h1, h2, h3, h4 {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 300;
  line-height: var(--leading-snug);
  letter-spacing: var(--tracking-tight);
  text-wrap: balance;
}

.display {
  font-family: var(--font-display);
  font-weight: 250;
  font-size: var(--text-3xl);
  line-height: var(--leading-tight);
  letter-spacing: var(--tracking-display);
  text-wrap: balance;
}

.display--xl { font-size: var(--text-4xl); }
.display--sm { font-size: var(--text-2xl); }

p { margin: 0; }
p + p { margin-top: 1.15em; }

.lede {
  font-size: var(--text-md);
  line-height: 1.55;
  color: var(--color-text);
}

.body-text {
  max-width: var(--measure);
  color: var(--color-text-muted);
}
.body-text strong {
  font-weight: 500;
  color: var(--color-text);
}

/* Indice di sezione — riferimento di tavola, non kicker grafico */
.index-mark {
  font-family: var(--font-sans);
  font-size: var(--text-2xs);
  font-weight: 500;
  letter-spacing: var(--tracking-label);
  text-transform: uppercase;
  color: var(--color-text-muted);
  font-variant-numeric: tabular-nums;
}

.label {
  font-family: var(--font-sans);
  font-size: var(--text-xs);
  font-weight: 500;
  letter-spacing: var(--tracking-label);
  text-transform: uppercase;
  color: var(--color-text-muted);
}

.caption {
  font-size: var(--text-sm);
  line-height: 1.5;
  color: var(--color-text-muted);
}

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

.grid {
  display: grid;
  grid-template-columns: repeat(12, minmax(0, 1fr));
  gap: var(--grid-gap);
}

@media (max-width: 899px) {
  .grid { grid-template-columns: repeat(6, minmax(0, 1fr)); }
}

.section {
  position: relative;
  padding-block: var(--section-y);
}
.section--lg { padding-block: var(--section-y-lg); }
.section--alt { background: var(--color-bg-alt); }

.on-deep {
  background: var(--color-deep);
  color: var(--color-text-on-deep);
}
.on-deep .body-text,
.on-deep .caption,
.on-deep .label,
.on-deep .index-mark { color: var(--color-muted-on-deep); }
.on-deep .body-text strong,
.on-deep .lede,
.on-deep h1, .on-deep h2, .on-deep h3,
.on-deep .display { color: var(--color-text-on-deep); }

.visually-hidden {
  position: absolute;
  width: 1px; height: 1px;
  margin: -1px; padding: 0;
  overflow: hidden;
  clip: rect(0 0 0 0);
  clip-path: inset(50%);
  white-space: nowrap;
  border: 0;
}

.skip-link {
  position: absolute;
  top: 0; left: 50%;
  transform: translate(-50%, -110%);
  z-index: 999;
  padding: 0.75rem 1.25rem;
  background: var(--color-deep);
  color: var(--color-text-on-deep);
  font-size: var(--text-xs);
  letter-spacing: var(--tracking-label);
  text-transform: uppercase;
  text-decoration: none;
  transition: transform var(--dur-sm) var(--ease);
}
.skip-link:focus-visible { transform: translate(-50%, 0); }

/* ---------- Rivelazioni --------------------------------------
   Default già visibile: se JS non parte, il contenuto c'è.     */
[data-reveal] {
  opacity: 1;
  transform: none;
}
.js [data-reveal] {
  opacity: 0;
  transform: translateY(26px);
  transition:
    opacity var(--dur-lg) var(--ease),
    transform var(--dur-lg) var(--ease);
}
.js [data-reveal].is-in { opacity: 1; transform: none; }
.js [data-reveal][data-delay="1"] { transition-delay: 90ms; }
.js [data-reveal][data-delay="2"] { transition-delay: 180ms; }
.js [data-reveal][data-delay="3"] { transition-delay: 270ms; }

/* Sipario sull'immagine: si apre dal basso */
.js [data-reveal-img] { clip-path: inset(0 0 100% 0); transition: clip-path 1.15s var(--ease); }
.js [data-reveal-img].is-in { clip-path: inset(0 0 0 0); }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
    scroll-behavior: auto !important;
  }
  .js [data-reveal],
  .js [data-reveal-img] { opacity: 1; transform: none; clip-path: none; }
}