/* ============================================================
   Studio Tecnico Luciani — sistema di stile
   Ispirato al linguaggio dei disegni tecnici: tavole numerate,
   cartigli, richiami in monospazio, carta millimetrata.
   ============================================================ */

:root{
  --paper: #F3F4EF;
  --paper-line: #D9DBD0;
  --white: #FFFFFF;
  --ink: #1E2A38;
  --ink-soft: #4A5560;
  --blue: #2C5C8A;
  --rust: #B5502A;
  --border: #C7CBC0;

  --font-display: 'Space Grotesk', sans-serif;
  --font-body: 'Source Serif 4', Georgia, serif;
  --font-mono: 'IBM Plex Mono', monospace;

  --container: 1120px;
}

*{ box-sizing: border-box; }
html{ scroll-behavior: smooth; }

body{
  margin: 0;
  background: var(--paper);
  background-image:
    linear-gradient(var(--paper-line) 1px, transparent 1px),
    linear-gradient(90deg, var(--paper-line) 1px, transparent 1px);
  background-size: 40px 40px;
  background-attachment: fixed;
  color: var(--ink-soft);
  font-family: var(--font-body);
  font-size: 17px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3{
  font-family: var(--font-display);
  color: var(--ink);
  margin: 0 0 0.5em 0;
  font-weight: 600;
  letter-spacing: -0.01em;
}

h1{ font-size: clamp(2.1rem, 4.2vw, 3.4rem); line-height: 1.08; }
h2{ font-size: clamp(1.5rem, 2.6vw, 2rem); line-height: 1.15; }
h3{ font-size: 1.2rem; }

p{ margin: 0 0 1.1em 0; max-width: 62ch; }

a{ color: var(--blue); text-decoration: none; }
a:hover{ text-decoration: underline; }
a:focus-visible, button:focus-visible{
  outline: 2px solid var(--blue);
  outline-offset: 3px;
}

.container{
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 1.6rem;
}

/* ---------- eyebrow / tavola label ---------- */
.tavola-label{
  display: inline-flex;
  align-items: center;
  gap: 0.55em;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--rust);
  margin-bottom: 0.9em;
}
.tavola-label::before{
  content: "";
  width: 9px;
  height: 9px;
  border: 1.5px solid var(--rust);
  transform: rotate(45deg);
  flex-shrink: 0;
}

/* ---------- header / nav ---------- */
.site-header{
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(243, 244, 239, 0.92);
  backdrop-filter: blur(6px);
  border-bottom: 1px solid var(--border);
}
.site-header .container{
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 76px;
}
.logotype{
  display: flex;
  align-items: baseline;
  gap: 0.5em;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.05rem;
  color: var(--ink);
  text-decoration: none;
  letter-spacing: 0.01em;
}
.logotype:hover{ text-decoration: none; }
.logotype .mark{
  width: 12px; height: 12px;
  background: var(--ink);
  display: inline-block;
}
.logotype .sub{
  font-family: var(--font-mono);
  font-size: 0.68rem;
  color: var(--ink-soft);
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

nav.main-nav ul{
  list-style: none;
  display: flex;
  gap: 2.1rem;
  margin: 0;
  padding: 0;
}
nav.main-nav a{
  color: var(--ink-soft);
  font-family: var(--font-mono);
  font-size: 0.86rem;
  letter-spacing: 0.03em;
  text-transform: uppercase;
  text-decoration: none;
  padding: 0.3em 0;
  border-bottom: 2px solid transparent;
}
nav.main-nav a:hover,
nav.main-nav a.active{
  color: var(--ink);
  border-bottom-color: var(--rust);
}

.nav-toggle{
  display: none;
  background: none;
  border: 1px solid var(--ink);
  width: 40px; height: 40px;
  cursor: pointer;
  position: relative;
}
.nav-toggle span, .nav-toggle span::before, .nav-toggle span::after{
  content: "";
  position: absolute;
  left: 9px; right: 9px;
  height: 2px;
  background: var(--ink);
}
.nav-toggle span{ top: 19px; }
.nav-toggle span::before{ top: -7px; }
.nav-toggle span::after{ top: 7px; }

/* ---------- hero ---------- */
.hero{
  padding: 5rem 0 4rem;
  position: relative;
  overflow: hidden;
}
.hero .container{
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 3rem;
  align-items: center;
}
.hero-lede{
  font-size: 1.15rem;
  color: var(--ink-soft);
}
.hero-actions{
  display: flex;
  gap: 1rem;
  margin-top: 1.6rem;
  flex-wrap: wrap;
}
.hero-schematic{
  width: 100%;
  height: auto;
  color: var(--blue);
  margin-bottom: 1.4rem;
}

/* ---------- buttons ---------- */
.btn{
  display: inline-flex;
  align-items: center;
  gap: 0.5em;
  padding: 0.85em 1.5em;
  font-family: var(--font-mono);
  font-size: 0.85rem;
  letter-spacing: 0.03em;
  text-transform: uppercase;
  text-decoration: none;
  border: 1.5px solid var(--ink);
  color: var(--ink);
  transition: background 0.15s ease, color 0.15s ease;
}
.btn:hover{ text-decoration: none; }
.btn-primary{
  background: var(--ink);
  color: var(--white);
}
.btn-primary:hover{ background: var(--rust); border-color: var(--rust); }
.btn-ghost:hover{ background: var(--ink); color: var(--white); }

/* ---------- cartiglio (title block) ---------- */
.cartiglio{
  background: var(--white);
  border: 1.5px solid var(--ink);
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--ink-soft);
}
.cartiglio-row{
  display: grid;
  grid-template-columns: 38% 62%;
  border-top: 1px solid var(--border);
}
.cartiglio-row:first-child{ border-top: none; }
.cartiglio-row dt{
  padding: 0.6em 0.8em;
  border-right: 1px solid var(--border);
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--rust);
  margin: 0;
}
.cartiglio-row dd{
  padding: 0.6em 0.8em;
  margin: 0;
  color: var(--ink);
}
.cartiglio dl{ margin: 0; }

/* ---------- sections ---------- */
section{ padding: 4.5rem 0; }
.section-border-top{ border-top: 1px solid var(--border); }
.section-head{ max-width: 60ch; margin-bottom: 2.6rem; }

/* ---------- tavole grid (servizi cards) ---------- */
.tavole-grid{
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1px;
  background: var(--border);
  border: 1px solid var(--border);
}
.tavola-card{
  background: var(--paper);
  padding: 2.2rem;
}
.tavola-card h3{ margin-bottom: 0.5em; }
.tavola-card p{ margin-bottom: 0.8em; font-size: 0.97rem; }
.tavola-card .link-more{
  font-family: var(--font-mono);
  font-size: 0.82rem;
  text-transform: uppercase;
  letter-spacing: 0.03em;
}

/* ---------- servizi page: elenco tavole verticali ---------- */
.tavola-full{
  padding: 2.4rem 0;
  border-top: 1px solid var(--border);
  display: grid;
  grid-template-columns: 220px 1fr;
  gap: 2rem;
}
.tavola-full:last-child{ border-bottom: 1px solid var(--border); }
.tavola-full .tavola-num{
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--rust);
  letter-spacing: 0.06em;
}

/* ---------- tag list (software / credenziali) ---------- */
.tag-list{
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
  padding: 0;
  list-style: none;
  margin: 1.2rem 0 0;
}
.tag-list li{
  font-family: var(--font-mono);
  font-size: 0.82rem;
  border: 1px solid var(--border);
  background: var(--white);
  padding: 0.5em 0.9em;
  color: var(--ink-soft);
}

/* ---------- CTA finale ---------- */
.cta-final{
  background: var(--ink);
  color: var(--paper);
}
.cta-final h2{ color: var(--white); }
.cta-final p{ color: #C7CFD6; }

/* ---------- footer ---------- */
footer.site-footer{
  border-top: 1px solid var(--border);
  padding: 3rem 0 2rem;
  font-size: 0.9rem;
}
.footer-grid{
  display: grid;
  grid-template-columns: 1.2fr 1fr 1fr;
  gap: 2rem;
  margin-bottom: 2rem;
}
.footer-grid h4{
  font-family: var(--font-mono);
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--rust);
  margin: 0 0 0.8em;
}
.footer-grid ul{ list-style: none; padding: 0; margin: 0; }
.footer-grid li{ margin-bottom: 0.5em; }
.footer-bottom{
  border-top: 1px solid var(--border);
  padding-top: 1.2rem;
  font-family: var(--font-mono);
  font-size: 0.76rem;
  color: var(--ink-soft);
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 0.5rem;
}

/* ---------- utility ---------- */
.text-center{ text-align: center; }
.mt-0{ margin-top: 0; }

/* ---------- responsive ---------- */
@media (max-width: 860px){
  .hero .container{ grid-template-columns: 1fr; }
  .tavole-grid{ grid-template-columns: 1fr; }
  .footer-grid{ grid-template-columns: 1fr; }
  .tavola-full{ grid-template-columns: 1fr; gap: 0.6rem; }
}

@media (max-width: 720px){
  nav.main-nav{
    position: absolute;
    top: 76px; left: 0; right: 0;
    background: var(--paper);
    border-bottom: 1px solid var(--border);
    display: none;
  }
  nav.main-nav.open{ display: block; }
  nav.main-nav ul{
    flex-direction: column;
    gap: 0;
    padding: 0.5rem 1.6rem 1.2rem;
  }
  nav.main-nav a{
    display: block;
    padding: 0.8em 0;
    border-bottom: 1px solid var(--border);
  }
  .nav-toggle{ display: block; }
}

@media (prefers-reduced-motion: reduce){
  html{ scroll-behavior: auto; }
  *{ transition: none !important; }
}