/* OIAR public site: shared base for the Enterprise landing and the blog.
   Same tokens, fonts and shell as the home page (oiarplatform/it/index.html),
   which still inlines its own copy: pages added after 2026-10 load this file. */

:root {
  --ink-950: oklch(0.145 0.012 256);
  --ink-900: oklch(0.175 0.013 256);
  --ink-850: oklch(0.205 0.014 256);
  --ink-800: oklch(0.245 0.015 256);
  --ink-750: oklch(0.285 0.015 256);
  --ink-700: oklch(0.335 0.015 256);
  --ink-500: oklch(0.575 0.013 256);
  --ink-400: oklch(0.655 0.012 256);
  --ink-200: oklch(0.885 0.007 256);
  --paper:   oklch(0.975 0.004 256);

  --signal:      oklch(0.84 0.165 158);
  --signal-dim:  oklch(0.72 0.135 158);
  --signal-deep: oklch(0.55 0.115 158);
  --signal-soft: oklch(0.94 0.05 158);
  --signal-glow: oklch(0.84 0.165 158 / 0.18);
  --on-signal:   oklch(0.22 0.05 158);

  --amber:      oklch(0.80 0.13 78);
  --amber-deep: oklch(0.52 0.10 70);
  --amber-glow: oklch(0.80 0.13 78 / 0.14);

  --violet:      oklch(0.78 0.11 290);
  --violet-glow: oklch(0.78 0.11 290 / 0.14);

  --danger-fg: oklch(0.82 0.1 25);
  --danger-bd: oklch(0.5 0.15 25);
  --danger-bg: oklch(0.4 0.13 25 / .15);

  --font-display: "Space Grotesk", sans-serif;
  --font-sans:    "IBM Plex Sans", sans-serif;
  --font-mono:    "IBM Plex Mono", monospace;

  --maxw: 1120px;
  --r: 12px;
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  background: var(--ink-950);
  color: var(--ink-200);
  font-family: var(--font-sans);
  font-size: 15px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}
a { color: inherit; text-decoration: none; }
body::before {
  content: "";
  position: fixed; inset: 0;
  background-image:
    linear-gradient(to right,  oklch(0.99 0 0 / 0.018) 1px, transparent 1px),
    linear-gradient(to bottom, oklch(0.99 0 0 / 0.018) 1px, transparent 1px);
  background-size: 46px 46px;
  pointer-events: none; z-index: 0;
}
.wrap { max-width: var(--maxw); margin: 0 auto; padding: 0 36px; position: relative; z-index: 1; }
.sig { color: var(--signal); }

/* ── NAV ── */
nav.site-nav {
  position: sticky; top: 0; z-index: 100;
  backdrop-filter: blur(16px);
  background: oklch(0.145 0.012 256 / 0.82);
  border-bottom: 1px solid var(--ink-850);
}
.nav-inner {
  max-width: var(--maxw); margin: 0 auto; padding: 0 36px;
  height: 58px; display: flex; align-items: center; justify-content: space-between; gap: 20px;
}
.nav-brand { display: flex; align-items: center; gap: 11px; }
.nav-wm { font-family: var(--font-display); font-weight: 600; font-size: 17px; letter-spacing: 0.14em; color: var(--paper); }
.nav-tag {
  font-family: var(--font-mono); font-size: 10.5px; letter-spacing: .1em; text-transform: uppercase;
  color: var(--signal-dim); border: 1px solid var(--ink-800); padding: 2px 7px; border-radius: 5px;
}
.nav-links { display: flex; gap: 2px; }
.nav-links a {
  font-size: 13.5px; font-weight: 500; color: var(--ink-400);
  padding: 6px 12px; border-radius: 7px; transition: color .16s, background .16s;
}
.nav-links a:hover, .nav-links a[aria-current="page"] { color: var(--paper); background: var(--ink-850); }
.nav-cta {
  white-space: nowrap; font-family: var(--font-mono); font-size: 12px; font-weight: 600;
  background: var(--signal); color: var(--on-signal);
  padding: 8px 16px; border-radius: 8px; letter-spacing: .02em; transition: opacity .16s;
}
.nav-cta:hover { opacity: .85; }
@media (max-width: 900px) { .nav-links { display: none; } }

.mark .edge { stroke: var(--ink-700); stroke-width: 2; fill: none; stroke-linecap: round; }
.mark .node { fill: var(--ink-950); stroke: var(--ink-500); stroke-width: 2; }
.mark .hub  { fill: var(--signal); }

/* ── BUTTONS ── */
.btn-primary, .btn-ghost {
  font-family: var(--font-mono); font-size: 13px; letter-spacing: .02em;
  padding: 12px 22px; border-radius: 9px;
  display: inline-flex; align-items: center; gap: 8px;
}
.btn-primary {
  font-weight: 600; background: var(--signal); color: var(--on-signal);
  transition: opacity .16s, transform .12s; border: none; cursor: pointer;
}
.btn-primary:hover { opacity: .85; transform: translateY(-1px); }
.btn-ghost { color: var(--ink-200); border: 1px solid var(--ink-750); transition: border-color .16s, color .16s; }
.btn-ghost:hover { border-color: var(--signal); color: var(--signal); }

/* ── SECTION SHELL ── */
.block { padding: 80px 0; border-top: 1px solid var(--ink-850); position: relative; z-index: 1; }
.sec-num { font-family: var(--font-mono); font-size: 11px; color: var(--signal-dim); letter-spacing: .06em; display: block; margin-bottom: 6px; }
.sec-title {
  font-family: var(--font-display); font-weight: 600; color: var(--paper);
  font-size: clamp(24px, 3.2vw, 36px); letter-spacing: -.015em; line-height: 1.15; margin-bottom: 12px;
}
.sec-desc { color: var(--ink-400); font-size: 15px; line-height: 1.68; max-width: 46em; }
.sec-head { margin-bottom: 44px; }

.card {
  border: 1px solid var(--ink-850); border-radius: var(--r);
  background: var(--ink-900); padding: 22px 20px;
}
.card .k { font-family: var(--font-mono); font-size: 11px; letter-spacing: .06em; text-transform: uppercase; color: var(--signal-dim); margin-bottom: 10px; }
.card h3, .card h4 { font-family: var(--font-display); font-weight: 600; color: var(--paper); font-size: 17px; line-height: 1.3; margin-bottom: 8px; }
.card p { color: var(--ink-400); font-size: 14px; line-height: 1.62; }
.grid-2 { display: grid; grid-template-columns: repeat(2, 1fr); gap: 14px; }
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px; }
.grid-4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: 14px; }
@media (max-width: 960px) { .grid-4 { grid-template-columns: repeat(2, 1fr); } .grid-3 { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 620px) { .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; } }

.pill {
  font-family: var(--font-mono); font-size: 11px; letter-spacing: .04em;
  color: var(--ink-200); background: var(--ink-850); border: 1px solid var(--ink-800);
  padding: 3px 9px; border-radius: 6px; display: inline-flex; align-items: center; gap: 6px; white-space: nowrap;
}
.pill.on { color: var(--signal); border-color: var(--signal-deep); }
.pill.amber { color: var(--amber); border-color: var(--amber-deep); }

/* tables */
.tbl-wrap { overflow-x: auto; border: 1px solid var(--ink-850); border-radius: var(--r); }
table.tbl { width: 100%; border-collapse: collapse; font-size: 14px; min-width: 560px; }
.tbl th, .tbl td { text-align: left; padding: 12px 16px; border-bottom: 1px solid var(--ink-850); vertical-align: top; }
.tbl th { font-family: var(--font-mono); font-size: 11px; letter-spacing: .06em; text-transform: uppercase; color: var(--ink-500); background: var(--ink-900); font-weight: 500; }
.tbl td { color: var(--ink-400); }
.tbl td:first-child { color: var(--ink-200); font-weight: 500; }
.tbl tr:last-child td { border-bottom: none; }

/* reveal on scroll */
.reveal { opacity: 0; transform: translateY(14px); transition: opacity .6s ease, transform .6s ease; }
.reveal.in { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) { .reveal { opacity: 1; transform: none; transition: none; } html { scroll-behavior: auto; } }

/* ── FOOTER ── */
footer.site-foot { border-top: 1px solid var(--ink-850); padding: 32px 0; position: relative; z-index: 1; }
.foot-inner { display: flex; justify-content: space-between; align-items: center; gap: 16px; flex-wrap: wrap; }
.foot-c { font-family: var(--font-mono); font-size: 11.5px; color: var(--ink-500); letter-spacing: .04em; }
.foot-links { display: flex; gap: 18px; flex-wrap: wrap; }
.foot-links a { font-size: 13px; color: var(--ink-400); }
.foot-links a:hover { color: var(--signal); }

/* ── FORM ── */
.lead-form { max-width: 680px; margin: 28px auto 0; text-align: left; }
.lf-row { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }
.lf-group { display: flex; flex-direction: column; gap: 6px; }
.lf-group.full { grid-column: 1 / -1; }
.lf-group label { font-family: var(--font-mono); font-size: 11px; letter-spacing: .04em; color: var(--ink-400); text-transform: uppercase; }
.lf-group input, .lf-group textarea, .lf-group select {
  background: var(--ink-900); border: 1px solid var(--ink-800); border-radius: 8px;
  padding: 11px 13px; color: var(--paper); font-family: var(--font-sans); font-size: 14px; width: 100%;
  transition: border-color .15s;
}
.lf-group input:focus, .lf-group textarea:focus, .lf-group select:focus { outline: none; border-color: var(--signal-deep); }
.lf-group textarea { min-height: 96px; resize: vertical; }
.lf-hp { position: absolute; left: -9999px; width: 1px; height: 1px; opacity: 0; }
.lf-consent { display: flex; align-items: flex-start; gap: 9px; margin: 16px 0 4px; font-size: 13px; color: var(--ink-400); cursor: pointer; }
.lf-consent input { margin-top: 3px; accent-color: var(--signal-deep); flex-shrink: 0; }
.lf-consent a { color: var(--signal); text-decoration: underline; }
.lead-form .btn-primary { width: 100%; justify-content: center; margin-top: 14px; }
.lf-note { font-size: 12px; color: var(--ink-500); margin-top: 12px; text-align: center; }
.lf-err { display: none; background: var(--danger-bg); border: 1px solid var(--danger-bd); color: var(--danger-fg); padding: 10px 13px; border-radius: 8px; font-size: 13px; margin-bottom: 14px; }
.form-success { display: none; flex-direction: column; align-items: center; gap: 12px; margin-top: 28px; text-align: center; }
.form-success h3 { font-family: var(--font-display); color: var(--paper); font-size: 22px; }
.form-success p { color: var(--ink-400); max-width: 34em; }
.succ-ico { width: 52px; height: 52px; border-radius: 50%; background: var(--signal-soft); display: grid; place-items: center; }
.succ-ico svg { width: 26px; height: 26px; stroke: var(--signal-deep); stroke-width: 2.5; fill: none; }
@media (max-width: 560px) { .lf-row { grid-template-columns: 1fr; } }

/* ── BLOG ── */
.post-card {
  display: flex; flex-direction: column; gap: 10px;
  border: 1px solid var(--ink-850); border-radius: var(--r); background: var(--ink-900);
  padding: 22px 20px; transition: border-color .16s, transform .16s;
}
.post-card:hover { border-color: var(--ink-700); transform: translateY(-2px); }
.post-card .meta { display: flex; gap: 8px; flex-wrap: wrap; align-items: center; }
.post-card h3 { font-family: var(--font-display); font-weight: 600; color: var(--paper); font-size: 18px; line-height: 1.3; }
.post-card p { color: var(--ink-400); font-size: 14px; line-height: 1.6; flex: 1; }
.post-card .more { font-family: var(--font-mono); font-size: 12px; color: var(--signal); }
.post-card.scenario { border-left: 3px solid var(--signal-deep); }

.filter-row { display: flex; gap: 8px; flex-wrap: wrap; margin-bottom: 26px; }
.filter-row button {
  font-family: var(--font-mono); font-size: 12px; color: var(--ink-400);
  background: transparent; border: 1px solid var(--ink-800); border-radius: 7px;
  padding: 6px 12px; cursor: pointer; transition: color .15s, border-color .15s;
}
.filter-row button:hover { color: var(--paper); border-color: var(--ink-700); }
.filter-row button[aria-pressed="true"] { color: var(--signal); border-color: var(--signal-deep); }

.post-hero { padding: 64px 0 36px; }
.crumbs { font-family: var(--font-mono); font-size: 12px; color: var(--ink-500); margin-bottom: 22px; }
.crumbs a { color: var(--ink-400); }
.crumbs a:hover { color: var(--signal); }
.post-hero h1 {
  font-family: var(--font-display); font-weight: 600; color: var(--paper);
  font-size: clamp(30px, 4.4vw, 48px); line-height: 1.1; letter-spacing: -.02em; margin-bottom: 18px; max-width: 22em;
}
.post-hero .lede { font-size: 18px; color: var(--ink-400); line-height: 1.6; max-width: 40em; margin-bottom: 22px; }
.post-hero .meta { display: flex; gap: 8px; flex-wrap: wrap; align-items: center; font-family: var(--font-mono); font-size: 12px; color: var(--ink-500); }

.post-layout { display: grid; grid-template-columns: minmax(0, 1fr) 280px; gap: 56px; padding-bottom: 72px; }
@media (max-width: 960px) { .post-layout { grid-template-columns: minmax(0, 1fr); } }
.post-aside { position: sticky; top: 82px; align-self: start; display: flex; flex-direction: column; gap: 14px; }
@media (max-width: 960px) { .post-aside { position: static; } }
.aside-box { border: 1px solid var(--ink-850); border-radius: var(--r); background: var(--ink-900); padding: 18px; }
.aside-box h4 { font-family: var(--font-mono); font-size: 11px; letter-spacing: .06em; text-transform: uppercase; color: var(--ink-500); margin-bottom: 10px; font-weight: 500; }
.aside-box p { font-size: 13.5px; color: var(--ink-400); margin-bottom: 12px; }
.aside-box ul { list-style: none; display: flex; flex-direction: column; gap: 8px; }
.aside-box li a { font-size: 13.5px; color: var(--ink-200); }
.aside-box li a:hover { color: var(--signal); }
.aside-box .btn-primary { width: 100%; justify-content: center; font-size: 12px; padding: 10px 14px; }

.prose { max-width: 44em; font-size: 16.5px; line-height: 1.75; color: var(--ink-200); }
.prose > * + * { margin-top: 1.05em; }
.prose h2 { font-family: var(--font-display); font-weight: 600; color: var(--paper); font-size: 26px; line-height: 1.25; letter-spacing: -.01em; margin-top: 1.9em; }
.prose h3 { font-family: var(--font-display); font-weight: 600; color: var(--paper); font-size: 19px; line-height: 1.3; margin-top: 1.6em; }
.prose p, .prose li { color: var(--ink-200); }
.prose strong { color: var(--paper); font-weight: 600; }
.prose a { color: var(--signal); text-decoration: underline; text-underline-offset: 3px; }
.prose .btn-primary, .post-cta .btn-primary { color: var(--on-signal); text-decoration: none; }
.prose .btn-ghost, .post-cta .btn-ghost { color: var(--ink-200); text-decoration: none; }
.prose .btn-ghost:hover, .post-cta .btn-ghost:hover { color: var(--signal); }
.prose ul, .prose ol { padding-left: 1.3em; }
.prose li + li { margin-top: .4em; }
.prose li::marker { color: var(--signal-dim); }
.prose code { font-family: var(--font-mono); font-size: .86em; background: var(--ink-850); border: 1px solid var(--ink-800); border-radius: 5px; padding: 1px 5px; color: var(--paper); }
.prose blockquote {
  border-left: 3px solid var(--signal-deep); background: var(--ink-900);
  padding: 14px 18px; border-radius: 0 10px 10px 0; color: var(--ink-400); font-style: italic;
}
.prose blockquote p { color: var(--ink-400); }
.prose .tbl-wrap { margin-top: 1.4em; }
.prose table.tbl { font-size: 14.5px; }
.prose hr { border: none; border-top: 1px solid var(--ink-850); margin: 2em 0; }

.post-cta {
  margin-top: 48px; border: 1px solid var(--ink-800); border-radius: var(--r);
  background: radial-gradient(ellipse 80% 120% at 0% 0%, var(--signal-glow), transparent 60%), var(--ink-900);
  padding: 26px 24px;
}
.post-cta h3 { font-family: var(--font-display); color: var(--paper); font-size: 20px; margin-bottom: 8px; }
.post-cta p { color: var(--ink-400); margin-bottom: 16px; font-size: 14.5px; }
.post-cta .acts { display: flex; gap: 10px; flex-wrap: wrap; }

@media (max-width: 620px) {
  .wrap, .nav-inner { padding: 0 16px; }
  .block { padding: 60px 0; }
  .prose { font-size: 16px; }
}
@media (max-width: 440px) {
  .nav-tag { display: none; }
  .nav-cta { padding: 7px 12px; font-size: 11.5px; }
}
section[id], h2[id] { scroll-margin-top: 72px; }

/* ── "Salva la skill" box at the end of a blog post ── */
.skill-box {
  margin-top: 48px; border: 1px solid var(--signal-deep); border-radius: var(--r);
  background: linear-gradient(135deg, oklch(0.55 0.115 158 / .14), transparent 60%), var(--ink-900);
  padding: 24px 24px 18px;
}
.skill-box .skill-k { font-family: var(--font-mono); font-size: 11px; letter-spacing: .08em; text-transform: uppercase; color: var(--signal); margin-bottom: 8px; }
.skill-box h3 { font-family: var(--font-display); color: var(--paper); font-size: 21px; margin: 0 0 8px; }
.skill-box p { color: var(--ink-400); font-size: 14.5px; margin: 0 0 16px; }
.skill-box .acts { display: flex; gap: 10px; flex-wrap: wrap; }
.skill-box .acts a { text-decoration: none; }
.skill-box .btn-primary { color: var(--on-signal); }
.skill-box .btn-ghost { color: var(--ink-200); }
.skill-box details { margin-top: 16px; border-top: 1px solid var(--ink-850); padding-top: 12px; }
.skill-box summary { cursor: pointer; font-family: var(--font-mono); font-size: 12px; color: var(--ink-400); }
.skill-box summary:hover { color: var(--signal); }
.skill-box ol { margin: 12px 0 0; padding-left: 1.2em; }
.skill-box li { font-size: 14px; color: var(--ink-400); }
.skill-box li + li { margin-top: 6px; }
.skill-box .skill-card { border: 1px solid var(--ink-800); background: var(--ink-950); border-radius: 9px; padding: 12px 14px; margin: 0 0 16px; display: flex; flex-direction: column; gap: 6px; }
.skill-box .skill-card code { align-self: flex-start; }
.skill-box .skill-card span { font-size: 13.5px; color: var(--ink-400); line-height: 1.55; }

/* ── SKILL BLOG ── */
.what-box { border: 1px solid var(--ink-800); background: var(--ink-900); border-radius: 14px; padding: 22px 24px; margin: 0 0 24px; }
.what-box h2 { font-family: var(--font-display); color: var(--paper); font-size: 20px; margin: 0 0 10px; }
.what-box p { color: var(--ink-300, var(--ink-400)); font-size: 15px; line-height: 1.65; margin: 0; }
.what-box p + p { margin-top: 10px; }
.search-row { margin: 0 0 14px; }
.search-row input { width: 100%; box-sizing: border-box; background: var(--ink-900); border: 1px solid var(--ink-800); color: var(--paper); border-radius: 10px; padding: 12px 14px; font: inherit; font-size: 15px; }
.search-row input:focus { outline: none; border-color: var(--signal); }
.sr-only { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }
.skill-box pre.skill-src { margin: 12px 0 0; max-height: 420px; overflow: auto; background: var(--ink-950); border: 1px solid var(--ink-800); border-radius: 9px; padding: 14px; font-family: var(--font-mono); font-size: 12.5px; line-height: 1.6; color: var(--ink-200); white-space: pre-wrap; word-break: break-word; }
.skill-box pre.skill-src code { background: none; border: 0; padding: 0; }