/* =============================================================
   EDIL VINCI — BASE
   Reset, tipografia di default, layout primitives, utilities,
   sistema di reveal. Dipende da tokens.css.
   ============================================================= */

/* ---------- Reset ---------- */

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

* { margin: 0; }

html {
  -webkit-text-size-adjust: 100%;
  scroll-padding-top: 6rem; /* compensazione header sticky sugli anchor */
}

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

body {
  overflow-x: clip; /* protegge dagli elementi a tutto bleed */
  font-family: var(--font-sans);
  font-size: var(--fs-body);
  font-weight: var(--fw-regular);
  line-height: var(--lh-body);
  color: var(--c-ink);
  background-color: var(--c-white);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

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

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

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

ul[class], ol[class] { list-style: none; padding: 0; }

address { font-style: normal; }

hr {
  border: 0;
  border-top: var(--hairline);
}

::selection {
  background: var(--c-red);
  color: var(--c-white);
}

/* ---------- Focus ---------- */

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

.on-dark :focus-visible,
.on-red :focus-visible {
  outline-color: var(--c-white);
}

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

h1, h2, h3, h4 {
  font-weight: var(--fw-semibold);
  line-height: var(--lh-heading);
  letter-spacing: var(--ls-display);
  text-wrap: balance;
}

.h-display {
  font-size: var(--fs-display);
  line-height: var(--lh-display);
  font-weight: var(--fw-bold);
}

.h-1 { font-size: var(--fs-1); font-weight: var(--fw-bold); line-height: 1.08; }
.h-2 { font-size: var(--fs-2); }
.h-3 { font-size: var(--fs-3); line-height: var(--lh-tight); }

p { max-width: var(--measure); }

.lead {
  font-size: var(--fs-body-l);
  line-height: 1.6;
}

.text-2 { color: var(--c-ink-2); }
.small  { font-size: var(--fs-small); }

/* Metadati d'archivio: maiuscoletto, tracking largo (doc 02 §4.4) */
.meta {
  font-size: var(--fs-meta);
  font-weight: var(--fw-medium);
  letter-spacing: var(--ls-meta);
  text-transform: uppercase;
  color: var(--c-ink-2);
  line-height: 1.5;
}

/* Cifre tabulari per numeri e date */
.tnum { font-variant-numeric: tabular-nums; }

/* Parola accentata dentro un titolo — max una per headline (doc 02 §4.3) */
.accent { color: var(--c-red); }

a {
  color: inherit;
  text-decoration-color: var(--c-line);
  text-underline-offset: 0.2em;
  transition: color var(--dur-1) var(--ease-out),
              text-decoration-color var(--dur-1) var(--ease-out);
}

a:hover { color: var(--c-red); text-decoration-color: currentColor; }

/* ---------- Superfici ---------- */

.surface-calce { background-color: var(--c-calce); }

.on-dark {
  background-color: var(--c-dark);
  color: var(--c-on-dark);
}
.on-dark .text-2, .on-dark .meta { color: var(--c-on-dark-2); }
.on-dark a:hover { color: var(--c-white); }

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

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

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

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

/* Griglia a 12 colonne, collassa a 1 su mobile */
.grid {
  display: grid;
  gap: var(--grid-gap);
  grid-template-columns: 1fr;
}

@media (min-width: 840px) {
  .grid { grid-template-columns: repeat(12, 1fr); }
  .col-4  { grid-column: span 4; }
  .col-5  { grid-column: span 5; }
  .col-6  { grid-column: span 6; }
  .col-7  { grid-column: span 7; }
  .col-8  { grid-column: span 8; }
  .col-12 { grid-column: span 12; }
}

/* ---------- Skip link ---------- */

.skip-link {
  position: fixed;
  top: var(--sp-3);
  left: var(--sp-3);
  z-index: var(--z-skip);
  padding: var(--sp-3) var(--sp-5);
  background: var(--c-ink);
  color: var(--c-white);
  text-decoration: none;
  font-weight: var(--fw-medium);
  transform: translateY(calc(-100% - var(--sp-5)));
}

.skip-link:focus-visible {
  transform: none;
  color: var(--c-white);
}

/* ---------- Reveal su scroll ----------
   Fade + traslazione 16px, una volta sola (doc 02 §4.7).
   JS aggiunge .is-visible; lo stagger arriva da --ri (indice
   assegnato in JS dentro i gruppi [data-reveal-group]). */

[data-reveal] {
  opacity: 0;
  transform: translateY(var(--reveal-offset));
  transition:
    opacity var(--dur-3) var(--ease-out),
    transform var(--dur-3) var(--ease-out);
  transition-delay: calc(var(--ri, 0) * 60ms);
}

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

/* Un'àncora dentro un elemento non ancora rivelato è traslata di 16px
   nel momento in cui il browser scorre al frammento: il margine compensa,
   così l'atterraggio resta a filo dello scroll-padding (es. #sopralluogo). */
[data-reveal][id]:not(.is-visible) { scroll-margin-top: var(--reveal-offset); }
.no-js [data-reveal][id] { scroll-margin-top: 0; }

/* Senza JS o con motion ridotto: tutto visibile, nessun movimento */
.no-js [data-reveal] {
  opacity: 1;
  transform: none;
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  [data-reveal] {
    opacity: 1;
    transform: none;
    transition: none;
  }
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}

/* ---------- Utilities ---------- */

.visually-hidden {
  position: absolute !important;
  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;
}

.nowrap { white-space: nowrap; }

.icon {
  width: 1.1em;
  height: 1.1em;
  flex: none;
}