:root {
      --bg: #f8fafc;
      --surface: rgba(255,255,255,0.82);
      --surface-strong: #ffffff;
      --text: #0f172a;
      --muted: #475569;
      --primary: #0ea5e9;
      --primary-dark: #0369a1;
      --accent: #14b8a6;
      --border: rgba(15, 23, 42, 0.10);
      --shadow: 0 18px 60px rgba(15, 23, 42, 0.10);
      --radius: 22px;
      --radius-sm: 14px;
      --max: 1180px;
    }

    * { box-sizing: border-box; }
    html { scroll-behavior: smooth; }
    body {
      margin: 0;
      font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
      color: var(--text);
      background:
        radial-gradient(circle at top left, rgba(14,165,233,.14), transparent 28%),
        radial-gradient(circle at top right, rgba(20,184,166,.13), transparent 24%),
        var(--bg);
      line-height: 1.55;
    }

    a { color: inherit; text-decoration: none; }
    img { max-width: 100%; display: block; }
    .container { width: min(var(--max), calc(100% - 32px)); margin: 0 auto; }
    .section { padding: 34px 0; }
    .badge {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      padding: 9px 14px;
      border-radius: 999px;
      background: rgba(14,165,233,.10);
      color: var(--primary-dark);
      font-size: .92rem;
      font-weight: 700;
      letter-spacing: .01em;
    }
    .nav {
      position: sticky;
      top: 0;
      z-index: 20;
      backdrop-filter: blur(12px);
      background: rgba(248,250,252,.72);
      border-bottom: 1px solid rgba(15,23,42,.06);
    }
    .nav-inner {
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 18px;
      min-height: 72px;
    }
    .brand {
      display: flex;
      align-items: center;
      gap: 10px;
      font-weight: 900;
      letter-spacing: -.02em;
      font-size: 1.05rem;
    }
    .brand-mark {
      width: 38px;
      height: 38px;
      border-radius: 12px;
      background: linear-gradient(135deg, var(--primary), var(--accent));
      box-shadow: 0 10px 28px rgba(14,165,233,.25);
      display: grid;
      place-items: center;
      color: #fff;
      font-size: 1.15rem;
      font-weight: 900;
    }
    .nav-links {
      display: flex;
      flex-wrap: wrap;
      gap: 8px;
    }
    .nav-links a {
      padding: 10px 14px;
      border-radius: 999px;
      color: var(--muted);
      font-weight: 600;
      font-size: .95rem;
    }
    .nav-links a:hover { background: rgba(15,23,42,.05); color: var(--text); }

    .hero { padding: 26px 0 16px; }
    .hero-grid {
      display: grid;
      grid-template-columns: 1.05fr .95fr;
      gap: 24px;
      align-items: stretch;
    }
    .hero-copy,
    .hero-card,
    .panel,
    .tool-card,
    .faq,
    .table-wrap,
    .summary-card {
      background: var(--surface);
      border: 1px solid var(--border);
      border-radius: var(--radius);
      box-shadow: var(--shadow);
      backdrop-filter: blur(12px);
    }
    .hero-copy {
      padding: 30px;
      display: flex;
      flex-direction: column;
      justify-content: center;
    }
    .hero-copy h1 {
      margin: 14px 0 14px;
      font-size: clamp(2rem, 5vw, 4rem);
      line-height: .98;
      letter-spacing: -.04em;
    }
    .hero-copy p {
      color: var(--muted);
      font-size: 1.04rem;
      margin: 0 0 18px;
      max-width: 62ch;
    }
    .hero-actions {
      display: flex;
      flex-wrap: wrap;
      gap: 12px;
      margin-top: 10px;
    }
    .btn {
      appearance: none;
      border: 0;
      cursor: pointer;
      display: inline-flex;
      justify-content: center;
      align-items: center;
      gap: 10px;
      min-height: 48px;
      padding: 0 18px;
      border-radius: 14px;
      font-weight: 800;
      font-size: .98rem;
      transition: transform .18s ease, box-shadow .18s ease, background .18s ease;
    }
    .btn:hover { transform: translateY(-1px); }
    .btn-primary {
      color: #fff;
      background: linear-gradient(135deg, var(--primary-dark), var(--primary));
      box-shadow: 0 14px 30px rgba(3,105,161,.24);
    }
    .btn-secondary {
      color: var(--text);
      background: rgba(255,255,255,.72);
      border: 1px solid var(--border);
    }
    .hero-stats {
      margin-top: 14px;
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 12px;
    }
    .stat {
      padding: 14px;
      border-radius: 16px;
      background: rgba(255,255,255,.7);
      border: 1px solid rgba(15,23,42,.06);
    }
    .stat strong { display: block; font-size: 1.18rem; }
    .stat span { color: var(--muted); font-size: .9rem; }

    .hero-card { padding: 22px; }
    .hero-card h2 { margin: 0 0 6px; font-size: 1.2rem; }
    .hero-card p { margin: 0 0 16px; color: var(--muted); }
    .mini-grid {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 12px;
    }
    .mini-box {
      border-radius: 18px;
      padding: 16px;
      background: linear-gradient(180deg, rgba(255,255,255,.96), rgba(241,245,249,.85));
      border: 1px solid rgba(15,23,42,.08);
      min-height: 104px;
    }
    .mini-box h3 { margin: 0 0 8px; font-size: .98rem; }
    .mini-box p { margin: 0; font-size: .92rem; color: var(--muted); }

    .section-head {
      display: flex;
      align-items: end;
      justify-content: space-between;
      gap: 16px;
      margin-bottom: 16px;
    }
    .section-head h2 {
      margin: 0;
      font-size: clamp(1.55rem, 3vw, 2.2rem);
      letter-spacing: -.03em;
    }
    .section-head p { margin: 8px 0 0; color: var(--muted); max-width: 70ch; }

    .tools-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 18px;
    }
    .tool-card { padding: 22px; }
    .tool-card h3 { margin: 0 0 8px; font-size: 1.2rem; }
    .tool-card > p { margin: 0 0 18px; color: var(--muted); }

    .form-grid {
      display: grid;
      grid-template-columns: repeat(2, minmax(0, 1fr));
      gap: 14px;
    }
    .field {
      display: flex;
      flex-direction: column;
      gap: 6px;
    }
    .field.full { grid-column: 1 / -1; }
    .field label {
      font-size: .92rem;
      font-weight: 700;
      color: var(--text);
    }
    .input,
    .select {
      width: 100%;
      min-height: 48px;
      border-radius: 14px;
      border: 1px solid rgba(15,23,42,.12);
      background: #fff;
      padding: 0 14px;
      font-size: 1rem;
      color: var(--text);
      outline: none;
      transition: border-color .2s ease, box-shadow .2s ease;
    }
    .input:focus,
    .select:focus {
      border-color: rgba(14,165,233,.55);
      box-shadow: 0 0 0 4px rgba(14,165,233,.12);
    }
    .helper { font-size: .85rem; color: var(--muted); }

    .panel {
      padding: 18px;
      margin-top: 18px;
      background: linear-gradient(180deg, rgba(255,255,255,.94), rgba(248,250,252,.92));
    }
    .results-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 12px;
      margin-top: 8px;
    }
    .result-box {
      border-radius: 18px;
      padding: 16px;
      background: #fff;
      border: 1px solid rgba(15,23,42,.08);
    }
    .result-box span { display: block; color: var(--muted); font-size: .88rem; }
    .result-box strong { display: block; margin-top: 4px; font-size: 1.2rem; letter-spacing: -.02em; }

    .summary-card {
      margin-top: 16px;
      padding: 18px;
    }
    .summary-card p { margin: 0; color: var(--muted); }

    .table-wrap {
      overflow: auto;
      margin-top: 18px;
      border-radius: 18px;
    }
    table {
      width: 100%;
      border-collapse: collapse;
      min-width: 740px;
      background: #fff;
    }
    th, td {
      padding: 12px 14px;
      text-align: left;
      border-bottom: 1px solid rgba(15,23,42,.08);
      font-size: .95rem;
    }
    th {
      position: sticky;
      top: 0;
      background: #fff;
      z-index: 1;
      font-size: .82rem;
      color: var(--muted);
      text-transform: uppercase;
      letter-spacing: .04em;
    }
    tbody tr:hover { background: rgba(14,165,233,.04); }

    .content-grid {
      display: grid;
      grid-template-columns: 1.1fr .9fr;
      gap: 18px;
      align-items: start;
    }
    .faq { padding: 22px; }
    .faq-item + .faq-item { margin-top: 14px; padding-top: 14px; border-top: 1px solid rgba(15,23,42,.08); }
    .faq-item h3 { margin: 0 0 6px; font-size: 1rem; }
    .faq-item p { margin: 0; color: var(--muted); }

    .seo-copy {
      padding: 22px;
      border-radius: var(--radius);
      background: linear-gradient(180deg, rgba(255,255,255,.88), rgba(255,255,255,.74));
      border: 1px solid var(--border);
      box-shadow: var(--shadow);
    }
    .seo-copy h3 { margin-top: 0; }
    .seo-copy p, .seo-copy li { color: var(--muted); }

    .footer {
      padding: 26px 0 42px;
      color: var(--muted);
      font-size: .95rem;
    }
    .footer-card {
      padding: 18px 20px;
      border-radius: 18px;
      background: rgba(255,255,255,.72);
      border: 1px solid var(--border);
    }

    @media (max-width: 980px) {
      .hero-grid,
      .tools-grid,
      .content-grid { grid-template-columns: 1fr; }
      .results-grid { grid-template-columns: 1fr 1fr; }
    }

    @media (max-width: 640px) {
      .container { width: min(var(--max), calc(100% - 20px)); }
      .nav-inner { min-height: 66px; align-items: flex-start; padding: 10px 0; }
      .nav-links { width: 100%; }
      .hero-copy,
      .hero-card,
      .tool-card,
      .faq,
      .seo-copy,
      .summary-card,
      .panel { padding: 18px; }
      .hero-stats,
      .mini-grid,
      .results-grid,
      .form-grid { grid-template-columns: 1fr; }
      .btn { width: 100%; }
      th, td { padding: 10px 12px; }
    }
 .hero-unified {
  max-width: 900px;
  margin: 0 auto;
  text-align: center;
}

.mini-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 15px;
  margin-top: 20px;
}
.tools-grid {
  display: flex;
  justify-content: center;
}

.tool-card {
  max-width: 800px;
  width: 100%;
}
*,
*::before,
*::after {
  box-sizing: border-box;
}

.nav {
  position: relative;
  background: #fff;
  border-bottom: 1px solid #e5e7eb;
}

.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  min-height: 72px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  color: #111827;
  font-weight: 700;
  flex-shrink: 0;
}

.brand-mark {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 38px;
  height: 38px;
  border-radius: 999px;
  background: #111827;
  color: #fff;
  font-size: 14px;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 20px;
  flex-wrap: wrap;
}

.nav-links a {
  text-decoration: none;
  color: #111827;
  font-weight: 500;
  line-height: 1.2;
}

.nav-links a:hover {
  opacity: 0.75;
}

.nav-toggle {
  display: none;
  width: 44px;
  height: 44px;
  padding: 0;
  border: 0;
  background: transparent;
  cursor: pointer;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
}

.nav-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  margin: 0 auto;
  background: #111827;
  border-radius: 999px;
}

/* Tablet/mobile */
@media (max-width: 900px) {
  .nav-inner {
    position: relative;
    min-height: 64px;
  }

  .nav-toggle {
    display: flex;
  }

  .nav-links {
    display: none;
    position: absolute;
    top: calc(100% + 1px);
    left: 0;
    right: 0;
    z-index: 20;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: 12px 16px;
    background: #fff;
    border-bottom: 1px solid #e5e7eb;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.08);
  }

  .nav-links.is-open {
    display: flex;
  }

  .nav-links a {
    display: block;
    padding: 14px 0;
    border-bottom: 1px solid #f3f4f6;
  }

  .nav-links a:last-child {
    border-bottom: 0;
  }
}
/* default */
.nav {
  position: relative;
  z-index: 50;
  background: #fff;
}

/* sticky SOLO su mobile */
@media (max-width: 900px) {
  .nav {
    position: sticky;
    top: 0;
    left: 0;
    right: 0;
  }
}
footer .container {
  text-align: center;
}

/* Solo il testo di copyright */
footer .footer-copy {
  text-align: center;
}