/* =========================
   Base / Design tokens
   ========================= */
:root{
  /* Colors */
  --bg: #ffffff;
  --surface: #f7f8fa;
  --text: #111827;         /* near-black */
  --muted: #6b7280;        /* gray */
  --border: #e5e7eb;

  --primary: #1e40af;      /* blue */
  --primary-2: #1d4ed8;    /* blue hover */
  --accent: #16a34a;       /* green */
  --accent-2: #22c55e;     /* green hover */

  /* Typography */
  --font: ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, Arial, "Noto Sans", "Helvetica Neue", sans-serif;
  --fs-900: clamp(2rem, 4vw, 3rem);
  --fs-700: clamp(1.25rem, 2vw, 1.5rem);
  --fs-500: 1rem;
  --lh: 1.6;

  /* Spacing */
  --container: 1120px;
  --pad: 1.25rem;
  --radius: 16px;

  /* Shadows */
  --shadow: 0 10px 30px rgba(0,0,0,.06);
}

/* =========================
   Reset
   ========================= */
*{ box-sizing: border-box; }
html, body{ height: 100%; }
body{
  margin: 0;
  font-family: var(--font);
  font-size: var(--fs-500);
  line-height: var(--lh);
  color: var(--text);
  background: var(--bg);
}
img{ max-width: 100%; display: block; }
a{ color: inherit; text-decoration: none; }
p{ margin: 0 0 1rem; color: var(--text); }
small{ color: var(--muted); }
ul{ margin: 0; padding-left: 1.2rem; }
:focus-visible{ outline: 3px solid rgba(22,163,74,.35); outline-offset: 3px; }

/* =========================
   Layout helpers
   ========================= */
.container{
  width: min(var(--container), calc(100% - (var(--pad) * 2)));
  margin-inline: auto;
}
.section{
  padding: clamp(2.5rem, 5vw, 4.5rem) 0;
}
.card{
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 1.25rem;
}
.muted{ color: var(--muted); }

/* =========================
   Header / Nav
   ========================= */
.site-header{
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(255,255,255,.85);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border);
}
.nav{
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: .9rem 0;
}
.brand{
  display: flex;
  flex-direction: column;
  line-height: 1.15;
}
.brand strong{ font-weight: 750; letter-spacing: .2px; }
.brand span{ font-size: .9rem; color: var(--muted); }

.nav-links{
  display: flex;
  gap: .9rem;
  align-items: center;
}
.nav-links a{
  padding: .45rem .6rem;
  border-radius: 10px;
  color: rgba(17,24,39,.9);
}
.nav-links a:hover{ background: var(--surface); }
.nav-links a[aria-current="page"]{
  background: rgba(30,64,175,.08);
  color: var(--primary);
}

/* Mobile nav (simple) */
.burger{
  display: none;
  border: 1px solid var(--border);
  background: var(--bg);
  border-radius: 12px;
  padding: .5rem .7rem;
}
@media (max-width: 860px){
  .burger{ display: inline-flex; }
  .nav-links{ display: none; }
  .nav-links.is-open{
    display: flex;
    position: absolute;
    left: 0;
    right: 0;
    top: 62px;
    background: var(--bg);
    border-bottom: 1px solid var(--border);
    padding: .75rem var(--pad);
    flex-direction: column;
    align-items: flex-start;
  }
}

/* =========================
   Buttons
   ========================= */
.btn{
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: .5rem;
  padding: .75rem 1rem;
  border-radius: 14px;
  border: 1px solid transparent;
  font-weight: 650;
  cursor: pointer;
  transition: transform .06s ease, background .15s ease, border-color .15s ease;
  user-select: none;
}
.btn:active{ transform: translateY(1px); }
.btn-primary{
  background: var(--primary);
  color: white;
}
.btn-primary:hover{ background: var(--primary-2); }
.btn-outline{
  background: transparent;
  border-color: var(--border);
  color: var(--text);
}
.btn-outline:hover{ background: var(--surface); }
.btn-accent{
  background: var(--accent);
  color: white;
}
.btn-accent:hover{ background: var(--accent-2); }

/* =========================
   Hero
   ========================= */
.hero{
  padding: clamp(3rem, 7vw, 5.5rem) 0;
  background: radial-gradient(1200px 500px at 20% 0%, rgba(30,64,175,.10), transparent 60%),
              radial-gradient(1200px 500px at 80% 0%, rgba(22,163,74,.08), transparent 60%);
}
.hero-grid{
  display: grid;
  grid-template-columns: 1.2fr .8fr;
  gap: 2rem;
  align-items: start;
}
@media (max-width: 900px){
  .hero-grid{ grid-template-columns: 1fr; }
}
.h1{
  font-size: var(--fs-900);
  line-height: 1.15;
  margin: 0 0 .9rem;
  letter-spacing: -0.6px;
}
.lead{
  font-size: var(--fs-700);
  color: rgba(17,24,39,.78);
  margin: 0 0 1.25rem;
}
.hero-actions{
  display: flex;
  gap: .75rem;
  flex-wrap: wrap;
}
.kpis{
  display: grid;
  gap: .75rem;
}
.kpi{
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1rem;
  background: rgba(255,255,255,.75);
}
.kpi strong{ display:block; font-size: 1.05rem; }
.kpi span{ color: var(--muted); font-size: .95rem; }

/* =========================
   Sections blocks
   ========================= */
.section-title{
  margin: 0 0 .75rem;
  font-size: 1.35rem;
  letter-spacing: -0.2px;
}
.grid-3{
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1rem;
}
@media (max-width: 900px){
  .grid-3{ grid-template-columns: 1fr; }
}

.hr{
  border: 0;
  border-top: 1px solid var(--border);
  margin: 0;
}

/* =========================
   Footer
   ========================= */
.site-footer{
  border-top: 1px solid var(--border);
  background: var(--surface);
}
.footer-inner{
  padding: 2rem 0;
  display: grid;
  gap: 1rem;
}
.footer-links{
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
}
.footer-links a{ color: var(--muted); }
.footer-links a:hover{ color: var(--text); }

/* =========================
   Readability / Rhythm (PASSO 3.1)
   Solo layout: spaziature, righe, respiro
   ========================= */

/* 1) Line length: limita la riga dei testi per leggibilità */
:root{
  --measure: 70ch; /* ~60–75 caratteri: zona “comoda” */
}

main p,
main ul,
main ol{
  max-width: var(--measure);
}

/* Eccezioni: dentro card/griglie il testo può usare tutta la larghezza */
.card p,
.card ul,
.card ol,
.grid-3 p,
.grid-3 ul,
.grid-3 ol{
  max-width: none;
}

/* 2) Vertical rhythm: spaziature coerenti tra elementi */
h1, h2, h3{
  margin: 0 0 .65rem;
}

h2.section-title{
  margin-bottom: .75rem;
}

p{
  margin: 0 0 1rem;
}

ul, ol{
  margin: 0 0 1rem;
}

li{
  margin: .35rem 0;
}

/* Titoli dentro card: un po’ più compatti */
.card h2, .card h3{
  margin-bottom: .5rem;
}

/* 3) Respiro delle sezioni: leggermente più “arioso” */
.section{
  padding: clamp(2.75rem, 5.5vw, 5rem) 0;
}

/* 4) Spazio tra righe nei testi lunghi */
.lead{
  line-height: 1.55;
}

/* 5) Migliora la leggibilità dei paragrafi muted (grigi) */
.muted{
  color: rgba(107,114,128,.92);
}

/* 6) Card: un filo più spazio interno su schermi medi/grandi */
@media (min-width: 900px){
  .card{
    padding: 1.5rem;
  }
}

/* 7) Liste nei card: un po’ più ordinate */
.card ul, .card ol{
  padding-left: 1.15rem;
}

/* Services page: list breathing inside cards */
.card ul{ margin-top: .5rem; }
.card p + ul{ margin-top: .35rem; }

/* Emphasis inside muted paragraphs */
.muted strong{
  color: var(--text);
}

/* Current page highlight even if link is a button */
.nav-links a[aria-current="page"].btn{
  outline: 3px solid rgba(30,64,175,.18);
  outline-offset: 2px;
}

html{ scroll-behavior: smooth; }

/* Disabled link (placeholder) */
/* .btn.is-disabled{
  pointer-events: none;
  opacity: .65;
  filter: grayscale(.15);
} */