/* ==========================================================================
   Base: reset, elementi, layout di pagina, utility
   ========================================================================== */

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

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: var(--font-body);
  font-size: var(--fs-body);
  font-weight: 400;
  line-height: 1.75;
  color: var(--c-text);
  background: var(--c-page);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
}

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

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

h1, h2, h3, h4, h5, h6 {
  margin: 0;
  font-family: var(--font-head);
  color: var(--c-text-strong);
  line-height: 1.15;
  font-weight: 900;
  text-wrap: balance;
}

p { margin: 0; }
ul, ol { margin: 0; padding: 0; list-style: none; }
button { font: inherit; cursor: pointer; }

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

/* Layout di pagina */
.argo-container {
  width: 100%;
  max-width: var(--container-max);
  margin-inline: auto;
  padding-inline: var(--container-pad);
}

.argo-section { position: relative; padding: var(--section-pad) 0; }
.argo-section--tight { padding: 60px 0; }
.argo-section--alt { background: linear-gradient(180deg, var(--c-surface-alt), var(--c-page)); }

/* Le sezioni full-bleed gestiscono da sole il proprio padding. */
.argo-section--flush { padding: 0; }

@media (max-width: 767px) {
  :root { --section-pad: 62px; }
}

/* Accessibilita */
.argo-skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  z-index: 1000;
  padding: 0.75rem 1.25rem;
  background: var(--c-navy);
  color: #fff;
  border-radius: 0 0 8px 0;
  font-family: var(--font-head);
  font-weight: 700;
}
.argo-skip-link:focus { left: 0; }

.screen-reader-text {
  border: 0;
  clip: rect(1px, 1px, 1px, 1px);
  clip-path: inset(50%);
  height: 1px;
  width: 1px;
  margin: -1px;
  overflow: hidden;
  padding: 0;
  position: absolute;
  word-wrap: normal !important;
}

/* Reveal allo scroll (motore vanilla) - stato di partenza.
   Attivo solo con JS: senza JS il contenuto resta pienamente visibile. */
.argo-js [data-anim] {
  opacity: 0;
  will-change: opacity, transform;
  transition: opacity var(--dur) var(--ease-out), transform var(--dur) var(--ease-out);
  transition-delay: var(--anim-delay, 0s);
}
.argo-js [data-anim="fade-up"]    { transform: translateY(38px); }
.argo-js [data-anim="fade-down"]  { transform: translateY(-38px); }
.argo-js [data-anim="fade-left"]  { transform: translateX(38px); }
.argo-js [data-anim="fade-right"] { transform: translateX(-38px); }
.argo-js [data-anim="zoom-in"]    { transform: scale(0.92); }
.argo-js [data-anim].is-visible {
  opacity: 1;
  transform: none;
}
/* Cascata: passo di 100ms. Per stagger piu fitti si imposta --anim-delay. */
[data-anim-delay="1"] { --anim-delay: 0.10s; }
[data-anim-delay="2"] { --anim-delay: 0.20s; }
[data-anim-delay="3"] { --anim-delay: 0.30s; }
[data-anim-delay="4"] { --anim-delay: 0.40s; }
[data-anim-delay="5"] { --anim-delay: 0.50s; }

@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;
  }
  [data-anim] { opacity: 1 !important; transform: none !important; }
}