/* ==========================================================================
   INDIOTECH — Design System
   Estetica: "blueprint industriale" — minimale, scura di base, tecnica.
   ========================================================================== */

@import url('https://fonts.googleapis.com/css2?family=Space+Grotesk:wght@400;500;600;700&family=IBM+Plex+Mono:wght@400;500;600&family=Inter:wght@400;500;600&display=swap');

/* ---------- Design tokens ---------- */
:root{
  /* Dark theme (default) */
  --bg:#0a0c0d;
  --bg-raised:#101314;
  --bg-raised-2:#15181a;
  --line:rgba(236,232,225,0.10);
  --line-strong:rgba(236,232,225,0.20);
  --text:#ece8e1;
  --text-dim:#9a9691;
  --text-faint:#6b6864;
  --accent:#4da8ff;
  --accent-strong:#7cc4ff;
  --accent-dim:rgba(77,168,255,0.14);
  --on-accent:#08111c;
  --teal:#3fc7b8;
  --teal-dim:rgba(63,199,184,0.14);
  --danger:#e5484d;
  --ok:#3fc78a;

  --font-head:'Space Grotesk', 'Segoe UI', sans-serif;
  --font-mono:'IBM Plex Mono', 'Courier New', monospace;
  --font-body:'Inter', 'Segoe UI', sans-serif;

  --container: 1240px;
  --radius: 3px;
  --shadow-soft: 0 20px 60px -20px rgba(0,0,0,0.6);

  color-scheme: dark;
}

html[data-theme="light"]{
  --bg:#f5f3ee;
  --bg-raised:#ffffff;
  --bg-raised-2:#eeece5;
  --line:rgba(20,18,14,0.10);
  --line-strong:rgba(20,18,14,0.22);
  --text:#17140f;
  --text-dim:#5c584f;
  --text-faint:#8b877d;
  --accent:#2952cc;
  --accent-strong:#1f3fa3;
  --accent-dim:rgba(41,82,204,0.10);
  --on-accent:#f7f9fd;
  --teal:#0f8a7c;
  --teal-dim:rgba(15,138,124,0.10);
  --shadow-soft: 0 20px 60px -25px rgba(20,18,14,0.25);
  color-scheme: light;
}

/* ---------- Reset ---------- */
*,*::before,*::after{ box-sizing:border-box; margin:0; padding:0; }
html{ scroll-behavior:smooth; }
body{
  background:var(--bg);
  color:var(--text);
  font-family:var(--font-body);
  font-size:16px;
  line-height:1.6;
  -webkit-font-smoothing:antialiased;
  transition:background .35s ease, color .35s ease;
  overflow-x:hidden;
}
body.pre-i18n{ visibility:hidden; }
img,svg,video{ max-width:100%; display:block; }
a{ color:inherit; text-decoration:none; }
ul{ list-style:none; }
button{ font:inherit; color:inherit; background:none; border:none; cursor:pointer; }
input,select,textarea{ font:inherit; color:inherit; }
::selection{ background:var(--accent); color:var(--on-accent); }

h1,h2,h3,h4{
  font-family:var(--font-head);
  font-weight:600;
  line-height:1.08;
  letter-spacing:-0.01em;
}
h1{ font-size:clamp(2.6rem,6vw,5.2rem); }
h2{ font-size:clamp(1.9rem,3.6vw,3rem); }
h3{ font-size:clamp(1.25rem,2vw,1.6rem); }

.container{ max-width:var(--container); margin:0 auto; padding:0 28px; }
.section{ padding:120px 0; }
.section--tight{ padding:72px 0; }
@media (max-width:720px){
  .section{ padding:72px 0; }
  .section--tight{ padding:48px 0; }
}

/* ---------- Utility ---------- */
.eyebrow{
  font-family:var(--font-mono);
  font-size:.78rem;
  letter-spacing:.14em;
  text-transform:uppercase;
  color:var(--accent);
  display:flex;
  align-items:center;
  gap:10px;
  margin-bottom:18px;
}
.eyebrow::before{
  content:"";
  width:22px; height:1px;
  background:var(--accent);
  display:inline-block;
}
.text-dim{ color:var(--text-dim); }
.mono{ font-family:var(--font-mono); }
.center{ text-align:center; }
.grid{ display:grid; }
.hidden{ display:none !important; }

/* Blueprint grid backdrop */
.blueprint-bg{
  position:absolute; inset:0;
  background-image:
    linear-gradient(var(--line) 1px, transparent 1px),
    linear-gradient(90deg, var(--line) 1px, transparent 1px);
  background-size:64px 64px;
  mask-image:linear-gradient(to bottom, rgba(0,0,0,.9), transparent 85%);
  pointer-events:none;
  opacity:.55;
}

/* ---------- Buttons ---------- */
.btn{
  display:inline-flex; align-items:center; gap:10px;
  padding:14px 26px;
  border:1px solid var(--line-strong);
  border-radius:var(--radius);
  font-family:var(--font-mono);
  font-size:.85rem;
  letter-spacing:.03em;
  text-transform:uppercase;
  transition:all .25s ease;
  white-space:nowrap;
}
.btn:hover{ border-color:var(--accent); color:var(--accent); transform:translateY(-1px); }
.btn-primary{
  background:var(--accent); border-color:var(--accent); color:var(--on-accent); font-weight:600;
}
.btn-primary:hover{ background:var(--accent-strong); border-color:var(--accent-strong); color:var(--on-accent); }
.btn-ghost{ border-color:transparent; padding-left:0; padding-right:0; }
.btn-ghost:hover{ transform:translateX(3px); }
.btn-block{ width:100%; justify-content:center; }
.btn svg{ width:16px; height:16px; }

/* ---------- Header / Nav ---------- */
.site-header{
  position:sticky; top:0; z-index:100;
  border-bottom:1px solid var(--line);
}
/* Lo sfondo sfocato vive su uno pseudo-elemento, non sull'header stesso: se backdrop-filter
   fosse sull'header, in Chromium diventerebbe un containing block per i discendenti
   position:fixed (il menu mobile), rompendone posizione e visibilità. */
.site-header::before{
  content:""; position:absolute; inset:0; z-index:-1;
  background:color-mix(in srgb, var(--bg) 88%, transparent);
  backdrop-filter:blur(10px);
}
.nav{
  display:flex; align-items:center; justify-content:space-between;
  height:78px;
}
.brand{
  display:flex; align-items:center; gap:10px;
  font-family:var(--font-head); font-weight:700; font-size:1.15rem;
  letter-spacing:-0.01em;
}
.brand-mark{ width:28px; height:28px; color:var(--accent); object-fit:contain; display:block; }
.brand small{
  display:block; font-family:var(--font-mono); font-weight:400; font-size:.62rem;
  letter-spacing:.14em; color:var(--text-faint); text-transform:uppercase; margin-top:1px;
}
.nav-links{ display:flex; align-items:center; gap:2px; }
.nav-links a{
  padding:10px 16px; font-size:.92rem; color:var(--text-dim);
  border-radius:var(--radius); transition:color .2s ease, background .2s ease;
  position:relative;
}
.nav-links a:hover{ color:var(--text); background:var(--bg-raised); }
.nav-links a.active{ color:var(--accent); }
.nav-links a.active::after{
  content:""; position:absolute; left:16px; right:16px; bottom:4px; height:1px; background:var(--accent);
}
.nav-tools{ display:flex; align-items:center; gap:10px; }
.icon-btn{
  width:38px; height:38px; display:flex; align-items:center; justify-content:center;
  border:1px solid var(--line); border-radius:var(--radius); transition:all .2s ease;
}
.icon-btn:hover{ border-color:var(--accent); color:var(--accent); }
.icon-btn svg{ width:17px; height:17px; }
.lang-switch{
  display:flex; border:1px solid var(--line); border-radius:var(--radius); overflow:hidden;
  font-family:var(--font-mono); font-size:.72rem; letter-spacing:.05em;
}
.lang-switch button{ padding:9px 11px; color:var(--text-faint); transition:all .2s ease; }
.lang-switch button.active{ background:var(--accent-dim); color:var(--accent); }
.theme-icon-sun{ display:none; }
html[data-theme="light"] .theme-icon-moon{ display:none; }
html[data-theme="light"] .theme-icon-sun{ display:block; }

.nav-burger{ display:none; width:38px; height:38px; border:1px solid var(--line); border-radius:var(--radius); align-items:center; justify-content:center; }
.nav-burger svg{ width:18px; height:18px; }

@media (max-width:900px){
  .nav-links{
    position:fixed; inset:78px 0 0 0; background:var(--bg); z-index:95;
    flex-direction:column; align-items:stretch; padding:18px;
    transform:translateY(-8px); opacity:0; pointer-events:none; transition:all .25s ease;
    border-top:1px solid var(--line);
  }
  .nav-links.open{ transform:translateY(0); opacity:1; pointer-events:auto; }
  .nav-links a{ padding:16px; font-size:1.05rem; border-bottom:1px solid var(--line); }
  .nav-burger{ display:flex; }
}

/* ---------- Footer ---------- */
.site-footer{ border-top:1px solid var(--line); padding:64px 0 32px; margin-top:80px; }
.footer-grid{
  display:grid; grid-template-columns:1.4fr 1fr 1fr 1fr; gap:40px; padding-bottom:48px;
}
@media (max-width:800px){ .footer-grid{ grid-template-columns:1fr 1fr; } }
.footer-col h4{
  font-family:var(--font-mono); font-size:.72rem; letter-spacing:.12em; text-transform:uppercase;
  color:var(--text-faint); margin-bottom:16px; font-weight:500;
}
.footer-col a, .footer-col p{ color:var(--text-dim); font-size:.92rem; }
.footer-col li{ margin-bottom:10px; }
.footer-col a:hover{ color:var(--accent); }
.footer-bottom{
  border-top:1px solid var(--line); padding-top:24px;
  display:flex; justify-content:space-between; align-items:center; flex-wrap:wrap; gap:12px;
  font-family:var(--font-mono); font-size:.75rem; color:var(--text-faint);
}

/* ---------- Cards ---------- */
.card{
  position:relative;
  background:var(--bg-raised);
  border:1px solid var(--line);
  border-radius:var(--radius);
  padding:32px;
  transition:border-color .25s ease, transform .25s ease;
}
.card:hover{ border-color:var(--line-strong); }
.corner{
  position:absolute; width:14px; height:14px; opacity:0; transition:opacity .25s ease;
  border-color:var(--accent);
}
.card:hover .corner{ opacity:1; }
.corner-tl{ top:-1px; left:-1px; border-top:1px solid; border-left:1px solid; }
.corner-br{ bottom:-1px; right:-1px; border-bottom:1px solid; border-right:1px solid; }

.badge{
  display:inline-block; font-family:var(--font-mono); font-size:.7rem; letter-spacing:.06em;
  text-transform:uppercase; padding:4px 10px; border-radius:2px;
  background:var(--accent-dim); color:var(--accent); border:1px solid transparent;
}
.badge-teal{ background:var(--teal-dim); color:var(--teal); }

/* ---------- Forms ---------- */
.field{ margin-bottom:22px; }
.field label{
  display:block; font-family:var(--font-mono); font-size:.75rem; letter-spacing:.06em;
  text-transform:uppercase; color:var(--text-dim); margin-bottom:8px;
}
.field .hint{ font-size:.78rem; color:var(--text-faint); margin-top:6px; }
.field input[type="text"],
.field input[type="email"],
.field input[type="tel"],
.field input[type="number"],
.field select,
.field textarea{
  width:100%; padding:13px 14px; background:var(--bg-raised-2);
  border:1px solid var(--line); border-radius:var(--radius); color:var(--text);
  transition:border-color .2s ease, background .2s ease;
}
.field input:focus, .field select:focus, .field textarea:focus{
  outline:none; border-color:var(--accent); background:var(--bg-raised);
}
.field textarea{ resize:vertical; min-height:120px; }
.row2{ display:grid; grid-template-columns:1fr 1fr; gap:18px; }
.row3{ display:grid; grid-template-columns:1fr 1fr 1fr; gap:18px; }
@media (max-width:640px){ .row2, .row3{ grid-template-columns:1fr; } }

.checkbox-field{ display:flex; align-items:flex-start; gap:12px; padding:14px; border:1px solid var(--line); border-radius:var(--radius); background:var(--bg-raised-2); cursor:pointer; }
.checkbox-field input{ margin-top:3px; accent-color:var(--accent); width:16px; height:16px; flex-shrink:0; }
.checkbox-field .cb-title{ font-weight:500; font-size:.95rem; }
.checkbox-field .cb-desc{ font-size:.82rem; color:var(--text-faint); margin-top:2px; }

.form-status{ margin-top:16px; padding:14px 16px; border-radius:var(--radius); font-size:.9rem; display:none; }
.form-status.show{ display:block; }
.form-status.ok{ background:rgba(63,199,138,.12); color:var(--ok); border:1px solid rgba(63,199,138,.3); }
.form-status.err{ background:rgba(229,72,77,.12); color:var(--danger); border:1px solid rgba(229,72,77,.3); }

/* ---------- Misc shared ---------- */
.hr{ height:1px; background:var(--line); border:none; margin:0; }
.stat{ font-family:var(--font-mono); }
.stat .num{ font-size:2.4rem; font-weight:600; color:var(--accent); font-family:var(--font-head); }
.stat .label{ font-size:.78rem; text-transform:uppercase; letter-spacing:.08em; color:var(--text-faint); margin-top:4px; }

.reveal{ opacity:0; transform:translateY(18px); transition:opacity .6s ease, transform .6s ease; }
.reveal.in{ opacity:1; transform:none; }

.page-hero{ padding:64px 0 48px; border-bottom:1px solid var(--line); position:relative; overflow:hidden; }
.breadcrumb{ font-family:var(--font-mono); font-size:.78rem; color:var(--text-faint); margin-bottom:24px; display:flex; gap:8px; align-items:center; }
.breadcrumb a:hover{ color:var(--accent); }

.tag-filter{ display:flex; flex-wrap:wrap; gap:10px; margin:36px 0 44px; }
.tag-filter button{
  padding:9px 16px; border:1px solid var(--line); border-radius:20px; font-family:var(--font-mono);
  font-size:.78rem; letter-spacing:.03em; color:var(--text-dim); transition:all .2s ease;
}
.tag-filter button:hover{ border-color:var(--accent); color:var(--accent); }
.tag-filter button.active{ background:var(--accent); border-color:var(--accent); color:var(--on-accent); font-weight:600; }

.back-to-top{
  position:fixed; bottom:28px; right:28px; z-index:90;
  width:44px; height:44px; border-radius:50%; background:var(--accent); color:var(--on-accent);
  display:flex; align-items:center; justify-content:center; opacity:0; pointer-events:none;
  transform:translateY(10px); transition:all .3s ease; box-shadow:var(--shadow-soft);
}
.back-to-top.show{ opacity:1; pointer-events:auto; transform:none; }
.back-to-top svg{ width:18px; height:18px; }