/* Stile condiviso per landing page e articoli blog statici */
:root {
  --c-bg: #ffffff;
  --c-fg: #1c1917;
  --c-muted: #57534e;
  --c-border: #e7e5e4;
  --c-accent: #1c1917;
  --c-accent-fg: #ffffff;
  --c-soft: #fafaf9;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  color: var(--c-fg);
  background: var(--c-bg);
  line-height: 1.6;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
}
a { color: var(--c-fg); text-decoration: underline; text-underline-offset: 3px; }
a:hover { text-decoration: none; }
.seo-nav {
  border-bottom: 1px solid var(--c-border);
  padding: 14px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  position: sticky;
  top: 0;
  background: rgba(255,255,255,.95);
  backdrop-filter: blur(8px);
  z-index: 10;
}
.seo-nav .brand {
  display: inline-flex; align-items: center; gap: 10px;
  font-weight: 800; font-size: 18px; text-decoration: none;
}
.seo-nav .brand-mark {
  display: inline-flex; align-items: center; justify-content: center;
  width: 32px; height: 32px;
  background: var(--c-accent); color: var(--c-accent-fg);
  border-radius: 8px; font-size: 13px; font-weight: 800;
}
.seo-nav .nav-cta {
  background: var(--c-accent); color: var(--c-accent-fg);
  padding: 9px 16px; border-radius: 8px; text-decoration: none;
  font-weight: 600; font-size: 14px;
}
.container {
  max-width: 760px;
  margin: 0 auto;
  padding: 48px 24px 80px;
}
.container.wide { max-width: 920px; }
h1 {
  font-size: clamp(28px, 4.5vw, 44px);
  font-weight: 800;
  line-height: 1.15;
  letter-spacing: -0.02em;
  margin: 0 0 16px;
}
h2 {
  font-size: clamp(22px, 3vw, 28px);
  font-weight: 700;
  line-height: 1.25;
  letter-spacing: -0.01em;
  margin: 40px 0 12px;
}
h3 {
  font-size: 18px;
  font-weight: 700;
  margin: 24px 0 8px;
}
p { margin: 0 0 16px; color: var(--c-fg); }
.lede { font-size: 18px; color: var(--c-muted); margin-bottom: 28px; }
ul, ol { padding-left: 22px; margin: 0 0 16px; }
li { margin-bottom: 6px; }
.cta-block {
  background: var(--c-soft);
  border: 1px solid var(--c-border);
  border-radius: 12px;
  padding: 24px;
  margin: 32px 0;
  text-align: center;
}
.btn {
  display: inline-block;
  padding: 12px 22px;
  border-radius: 8px;
  background: var(--c-accent);
  color: var(--c-accent-fg);
  text-decoration: none;
  font-weight: 600;
  font-size: 15px;
}
.btn:hover { opacity: .9; text-decoration: none; }
.faq { margin: 32px 0; }
.faq details {
  border: 1px solid var(--c-border);
  border-radius: 8px;
  padding: 14px 18px;
  margin-bottom: 10px;
}
.faq summary {
  cursor: pointer;
  font-weight: 600;
  list-style: none;
  position: relative;
  padding-right: 24px;
}
.faq summary::after {
  content: '+';
  position: absolute; right: 0; top: 0;
  font-size: 20px; color: var(--c-muted);
}
.faq details[open] summary::after { content: '−'; }
.faq details[open] summary { margin-bottom: 10px; }
.crumb {
  font-size: 13px; color: var(--c-muted);
  margin-bottom: 12px;
}
.crumb a { color: var(--c-muted); }
.related {
  margin-top: 60px; padding-top: 32px;
  border-top: 1px solid var(--c-border);
}
.related h2 { margin-top: 0; font-size: 20px; }
.related ul { list-style: none; padding: 0; }
.related li { margin-bottom: 6px; }
footer.seo-footer {
  border-top: 1px solid var(--c-border);
  padding: 28px 24px;
  text-align: center;
  color: var(--c-muted);
  font-size: 13px;
}
.meta-row {
  display: flex; gap: 16px; flex-wrap: wrap;
  font-size: 13px; color: var(--c-muted);
  margin-bottom: 24px;
}
.tag {
  display: inline-block;
  background: var(--c-soft);
  border: 1px solid var(--c-border);
  padding: 3px 10px;
  border-radius: 999px;
  font-size: 12px;
  font-weight: 500;
}
table {
  width: 100%; border-collapse: collapse; margin: 16px 0;
  font-size: 15px;
}
th, td {
  text-align: left; padding: 10px 12px;
  border-bottom: 1px solid var(--c-border);
}
th { background: var(--c-soft); font-weight: 600; }

/* ===== Generatore QR client-side (/vendor/qr-tool.js) ===== */
.qrt-box {
  border: 1px solid var(--c-border);
  border-radius: 14px;
  padding: 22px;
  margin: 28px 0 36px;
}
.qrt-box > h2 { margin: 0 0 6px; font-size: 20px; }
.qrt-box .qrt-intro { font-size: 14px; color: var(--c-muted); margin: 0 0 18px; }
.qrt-tabs { display: flex; flex-wrap: wrap; gap: 6px; margin-bottom: 18px; }
.qrt-tab {
  font: inherit; font-size: 14px; font-weight: 600;
  padding: 7px 14px; border-radius: 999px; cursor: pointer;
  border: 1px solid var(--c-border); background: var(--c-bg); color: var(--c-muted);
}
.qrt-tab:hover { border-color: var(--c-accent); }
.qrt-tab.is-attivo { background: var(--c-accent); color: var(--c-accent-fg); border-color: var(--c-accent); }
.qrt-grid { display: grid; grid-template-columns: 1fr 240px; gap: 24px; align-items: start; }
@media (max-width: 640px) { .qrt-grid { grid-template-columns: 1fr; } }
.qrt-campo { margin-bottom: 14px; }
.qrt-campo label { display: block; font-size: 13px; font-weight: 600; margin-bottom: 6px; }
.qrt-campo input[type="text"], .qrt-campo input[type="url"], .qrt-campo textarea, .qrt-campo select {
  width: 100%; padding: 10px 12px; font: inherit; font-size: 15px;
  border: 1px solid var(--c-border); border-radius: 8px;
  background: var(--c-bg); color: var(--c-fg);
}
.qrt-campo textarea { resize: vertical; min-height: 72px; }
.qrt-campo input:focus, .qrt-campo textarea:focus, .qrt-campo select:focus {
  outline: 2px solid var(--c-accent); outline-offset: 1px;
}
.qrt-lato { text-align: center; }
.qrt-canvas {
  width: 200px; height: 200px; max-width: 100%;
  border: 1px solid var(--c-border); border-radius: 10px; background: #fff;
}
.qrt-azioni { margin-top: 12px; display: flex; flex-direction: column; gap: 8px; }
.qrt-azioni .btn {
  width: 100%; text-align: center; border: 0; cursor: pointer;
  font-family: inherit; font-size: 15px;
}
.qrt-azioni .btn-ghost {
  background: transparent; color: var(--c-fg); border: 1px solid var(--c-border);
}
.qrt-err { color: #b91c1c; font-size: 13px; min-height: 18px; margin: 10px 0 0; }
.qrt-opzioni {
  display: flex; gap: 14px; flex-wrap: wrap;
  margin-top: 18px; padding-top: 16px; border-top: 1px solid var(--c-border);
}
.qrt-opzioni .qrt-campo { flex: 1 1 150px; margin-bottom: 0; }
.qrt-opzioni .qrt-campo--colore { flex: 0 0 110px; }
.qrt-opzioni input[type="color"] {
  width: 100%; height: 40px; padding: 4px; cursor: pointer;
  border: 1px solid var(--c-border); border-radius: 8px; background: var(--c-bg);
}
.qrt-nota {
  font-size: 13px; color: var(--c-muted);
  margin: 16px 0 0; padding-top: 14px; border-top: 1px solid var(--c-border);
}
.qrt-nota strong { color: var(--c-fg); }