/* ═══════════════════════════════════════════════════════
   BASE.CSS — Design System Condiviso
   BigBag Smart / Greenplast S.r.l.s.
   ═══════════════════════════════════════════════════════

   SICUREZZA CSS:
   • Nessun url() da input utente
   • Nessuna import da domini non fidati
   • Tutte le risorse esterne dichiarate esplicitamente
*/

/* ── RESET ── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

/* ── VARIABILI GLOBALI ── */
:root {
  --nero:        #0a0a0a;
  --scuro:       #111111;
  --scuro-2:     #161616;
  --verde:       #2ecc71;
  --verde-dim:   #1a7a44;
  --verde-glow:  rgba(46, 204, 113, 0.15);
  --rosso:       #e74c3c;
  --bianco:      #f5f5f0;
  --grigio:      #888;
  --grigio-2:    rgba(245,245,240,0.45);
  --banner-h:    40px;

  --radius-sm:   8px;
  --radius-md:   16px;
  --radius-lg:   24px;

  --transition-fast:   0.2s ease;
  --transition-med:    0.35s ease;
  --transition-slow:   0.65s cubic-bezier(0.34,1.2,0.64,1);

  --shadow-card: 0 20px 60px rgba(0,0,0,0.4);
  --shadow-glow: 0 0 40px rgba(46,204,113,0.2);
}

/* ── TIPOGRAFIA ── */
html { scroll-behavior: smooth; font-size: 16px; }

body {
  background: var(--nero);
  color: var(--bianco);
  font-family: 'Barlow', sans-serif;
  font-weight: 300;
  overflow-x: hidden;
  line-height: 1.6;
}

/* Grana di sfondo */
body::before {
  content: '';
  position: fixed; inset: 0;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)' opacity='0.04'/%3E%3C/svg%3E");
  pointer-events: none;
  z-index: 0;
  opacity: 0.5;
}

/* ── UTILITÀ ── */
.visibile-screen-reader {
  position: absolute; width: 1px; height: 1px;
  padding: 0; margin: -1px; overflow: hidden;
  clip: rect(0,0,0,0); white-space: nowrap; border: 0;
}

/* ═══════════════════════════════════════════════════════
   BANNER LINGUA
═══════════════════════════════════════════════════════ */
#lang-banner {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 400;
  background: rgba(12,12,12,0.95);
  border-bottom: 1px solid rgba(46,204,113,0.3);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.8rem;
  padding: 0 1rem;
  height: var(--banner-h);
  font-size: 0.8rem;
  flex-wrap: nowrap;
  transform: translateY(-110%);
  transition: transform 0.5s cubic-bezier(0.22,1,0.36,1);
  overflow: hidden;
}
#lang-banner.visibile { transform: translateY(0); }

#lang-banner-testo {
  color: rgba(245,245,240,0.7);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  flex-shrink: 1;
  min-width: 0;
}

.lang-btn-gruppo { display: flex; gap: 0.35rem; flex-shrink: 0; }

.lang-btn {
  background: rgba(255,255,255,0.07);
  border: 1px solid rgba(255,255,255,0.15);
  color: var(--bianco);
  padding: 0.22rem 0.7rem;
  border-radius: 999px;
  cursor: pointer;
  font-family: 'Barlow', sans-serif;
  font-size: 0.75rem;
  transition: background var(--transition-fast), border-color var(--transition-fast), color var(--transition-fast);
  line-height: 1.5;
  white-space: nowrap;
}
.lang-btn:hover  { background: var(--verde); border-color: var(--verde); color: #000; }
.lang-btn.attivo { background: var(--verde); border-color: var(--verde); color: #000; font-weight: 600; }

#lang-banner-chiudi {
  background: none; border: none;
  color: rgba(255,255,255,0.35);
  cursor: pointer; font-size: 1rem;
  padding: 0.2rem 0.3rem;
  transition: color var(--transition-fast);
  flex-shrink: 0; line-height: 1;
}
#lang-banner-chiudi:hover { color: var(--bianco); }

@media (max-width: 480px) {
  #lang-banner-testo { display: none; }
  #lang-banner { justify-content: space-between; padding: 0 0.8rem; }
}

/* ═══════════════════════════════════════════════════════
   HEADER
═══════════════════════════════════════════════════════ */
header {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  display: flex; align-items: center; justify-content: space-between;
  padding: 0.9rem 2.5rem;
  background: rgba(10,10,10,0.88);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid rgba(46,204,113,0.15);
  transition: padding var(--transition-med), top 0.5s cubic-bezier(0.22,1,0.36,1);
}
header.con-banner { top: var(--banner-h); }
header.scrolled   { padding: 0.6rem 2.5rem; }

.logo-link {
  display: inline-flex; align-items: center;
  text-decoration: none; flex-shrink: 0;
}
.logo-link img { height: 44px; width: auto; transition: opacity var(--transition-fast); display: block; }
.logo-link:hover img { opacity: 0.82; }

/* NAV DESKTOP — voci visibili su schermi grandi */
.nav-desktop {
  display: flex; align-items: center; gap: 2rem;
}
.nav-desktop a {
  font-family: 'Bebas Neue', sans-serif;
  font-size: 1rem; letter-spacing: 0.18em;
  color: rgba(245,245,240,0.65);
  text-decoration: none;
  transition: color var(--transition-fast);
  position: relative;
}
.nav-desktop a::after {
  content: '';
  position: absolute; bottom: -4px; left: 0; right: 0;
  height: 1px; background: var(--verde);
  transform: scaleX(0); transform-origin: left;
  transition: transform var(--transition-med);
}
.nav-desktop a:hover,
.nav-desktop a.attiva { color: var(--bianco); }
.nav-desktop a:hover::after,
.nav-desktop a.attiva::after { transform: scaleX(1); }
.nav-desktop a.attiva { color: var(--verde); }

@media (max-width: 768px) {
  .nav-desktop { display: none; }
}

/* BURGER */
.burger {
  width: 36px; height: 24px;
  display: flex; flex-direction: column; justify-content: space-between;
  cursor: pointer; background: none; border: none;
  padding: 0; z-index: 200;
}
.burger span {
  display: block; height: 2px; background: var(--bianco);
  border-radius: 2px;
  transition: transform 0.35s ease, opacity 0.35s ease, background var(--transition-med);
}
.burger:hover span { background: var(--verde); }
.burger.aperto span:nth-child(1) { transform: translateY(11px) rotate(45deg); background: var(--rosso); }
.burger.aperto span:nth-child(2) { opacity: 0; }
.burger.aperto span:nth-child(3) { transform: translateY(-11px) rotate(-45deg); background: var(--rosso); }

/* NAV DRAWER */
.nav-drawer {
  position: fixed; top: 0; right: -100%;
  width: min(340px, 100vw); height: 100vh;
  background: var(--scuro);
  border-left: 1px solid rgba(46,204,113,0.2);
  z-index: 150;
  display: flex; flex-direction: column; justify-content: center;
  padding: 4rem 3rem;
  transition: right 0.45s cubic-bezier(0.77,0,0.18,1);
}
.nav-drawer.aperto { right: 0; }

.nav-overlay {
  position: fixed; inset: 0;
  background: rgba(0,0,0,0.6);
  z-index: 140;
  opacity: 0; pointer-events: none;
  transition: opacity var(--transition-med);
}
.nav-overlay.aperto { opacity: 1; pointer-events: all; }

.nav-drawer .logo-nav {
  margin-bottom: 2.5rem;
  padding-bottom: 1.5rem;
  border-bottom: 1px solid rgba(255,255,255,0.08);
}
.nav-drawer .logo-nav img { height: 36px; width: auto; }

.nav-drawer a {
  display: block;
  font-family: 'Bebas Neue', sans-serif;
  font-size: 2.2rem; letter-spacing: 0.1em;
  color: var(--bianco); text-decoration: none;
  padding: 0.5rem 0;
  border-bottom: 1px solid rgba(255,255,255,0.06);
  transition: color var(--transition-fast), padding-left 0.25s;
}
.nav-drawer a:hover { color: var(--verde); padding-left: 0.6rem; }
.nav-drawer a.attiva { color: var(--verde); }

/* ═══════════════════════════════════════════════════════
   DIVISORE
═══════════════════════════════════════════════════════ */
.divisore {
  width: 100%; height: 1px;
  background: linear-gradient(90deg, transparent, rgba(46,204,113,0.3), rgba(231,76,60,0.3), transparent);
  margin: 0 auto; max-width: 800px;
}

/* ═══════════════════════════════════════════════════════
   FOOTER
═══════════════════════════════════════════════════════ */
footer {
  position: relative; z-index: 1;
  background: #0d0d0d;
  border-top: 1px solid rgba(255,255,255,0.06);
  padding: 4rem 2rem 2.5rem;
}
.footer-interno {
  max-width: 1000px; margin: 0 auto;
  display: grid; grid-template-columns: 1fr 1fr 1fr; gap: 3rem;
}
.footer-brand img { height: 36px; width: auto; margin-bottom: 1rem; display: block; }
.footer-brand p {
  font-size: 0.85rem; line-height: 1.75;
  color: var(--grigio-2); max-width: 240px;
}
.footer-col h4 {
  font-family: 'Bebas Neue', sans-serif;
  font-size: 1rem; letter-spacing: 0.2em; color: var(--verde); margin-bottom: 1rem;
}
.footer-col p, .footer-col a {
  font-size: 0.85rem; line-height: 2;
  color: var(--grigio-2);
  text-decoration: none; display: block; transition: color var(--transition-fast);
}
.footer-col a:hover { color: var(--bianco); }
.footer-fondo {
  max-width: 1000px; margin: 3rem auto 0;
  padding-top: 1.5rem;
  border-top: 1px solid rgba(255,255,255,0.06);
  display: flex; align-items: center; justify-content: space-between;
  font-size: 0.75rem; color: rgba(245,245,240,0.22);
  flex-wrap: wrap; gap: 0.5rem;
}
.footer-fondo .cuore { color: var(--rosso); }
.made-in-italy-badge {
  display: inline-flex; align-items: center; gap: 0.4rem;
  font-size: 0.7rem; letter-spacing: 0.2em; text-transform: uppercase;
  color: rgba(245,245,240,0.35);
}
.made-in-italy-badge span { font-size: 1rem; }

/* ═══════════════════════════════════════════════════════
   SCROLL REVEAL
═══════════════════════════════════════════════════════ */
.rivela {
  opacity: 0; transform: translateY(30px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}
.rivela.visibile { opacity: 1; transform: translateY(0); }
.rivela:nth-child(2) { transition-delay: 0.1s; }
.rivela:nth-child(3) { transition-delay: 0.2s; }
.rivela:nth-child(4) { transition-delay: 0.3s; }

/* Etichette sezione (tag-label sopra i titoli) */
.etichetta-sezione {
  font-size: 0.7rem; letter-spacing: 0.4em;
  text-transform: uppercase; color: var(--verde);
  margin-bottom: 1rem; display: block;
}

/* Titoli di sezione condivisi */
.titolo-sezione {
  font-family: 'Bebas Neue', sans-serif;
  font-size: clamp(2.2rem, 5vw, 3.8rem);
  line-height: 1; letter-spacing: 0.05em;
  margin-bottom: 1rem;
}
.titolo-sezione em     { font-style: normal; color: var(--verde); }
.titolo-sezione strong { font-weight: 400;   color: var(--rosso); }

.sottotitolo-sezione {
  font-size: 1rem; color: var(--grigio-2); max-width: 560px;
  line-height: 1.7; margin-bottom: 3.5rem;
}

/* ═══════════════════════════════════════════════════════
   RESPONSIVE BASE
═══════════════════════════════════════════════════════ */
@media (max-width: 768px) {
  header { padding: 0.8rem 1.5rem; }
  .footer-interno { grid-template-columns: 1fr; gap: 2rem; }
  .footer-fondo { flex-direction: column; align-items: flex-start; }
}

/* Accessibilità: riduzione movimento */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}