/* Ontopoietica — foglio di stile condiviso
   Identità visiva coerente con profpaul.icu (dark + accento neon).
   Vincoli mantenuti: zero JS, font di sistema, contrasto AA, niente layout shift,
   rispetto di prefers-reduced-motion. */

:root {
  --bg: #0a0a0a;
  --fg: #f5f5f5;
  --text: #cccccc;          /* testo lungo: leggibile su nero, passa AA */
  --accent: #00ff88;
  --accent-dim: #00cc6a;
  --accent-alt: #ffaa00;
  --muted: #8a8a8a;         /* meta/secondario */
  --card: #151515;
  --card-2: #1b1b1b;
  --border: rgba(255,255,255,0.10);
  --glow: rgba(0,255,136,0.20);
  --max: 46rem;             /* larghezza di lettura */
  --sans: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

*, *::before, *::after { box-sizing: border-box; }
html { font-size: 100%; scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  font-family: var(--sans);
  background: var(--bg);
  color: var(--text);
  line-height: 1.7;
  font-size: 1.0625rem;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

/* ---- Layout ---- */
.wrap { width: 100%; max-width: var(--max); margin-inline: auto; padding-inline: 1.25rem; }
.wide { max-width: 72rem; }
main { display: block; }
section { padding-block: clamp(2.5rem, 6vw, 4.5rem); }
section + section { border-top: 1px solid var(--border); }

/* ---- Tipografia ---- */
h1, h2, h3 { color: var(--fg); line-height: 1.15; font-weight: 800; letter-spacing: -0.01em; }
h1 {
  font-size: clamp(2.1rem, 5.5vw, 3.4rem);
  margin: 0 0 0.5em;
  background: linear-gradient(135deg, var(--fg) 0%, var(--accent) 100%);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}
@supports not ((-webkit-background-clip: text) or (background-clip: text)) {
  h1 { color: var(--accent); }
}
h2 { font-size: clamp(1.5rem, 3.5vw, 2.1rem); margin: 0 0 0.6em; }
h3 { font-size: 1.25rem; margin: 1.8em 0 0.4em; color: var(--accent); }
p { margin: 0 0 1.1em; }
.lead { font-size: 1.2rem; color: var(--fg); }
.kicker { text-transform: uppercase; letter-spacing: 0.15em; font-size: 0.8rem; font-weight: 600; color: var(--accent); margin: 0 0 0.8em; }
small, .meta { color: var(--muted); font-size: 0.9rem; }
strong { color: var(--fg); font-weight: 700; }
em { font-style: italic; }

a { color: var(--accent); text-decoration-thickness: 1px; text-underline-offset: 3px; transition: color 0.2s; }
a:hover { color: var(--fg); }

blockquote {
  margin: 1.6em 0; padding: 0.4em 0 0.4em 1.2em;
  border-left: 3px solid var(--accent);
  font-size: 1.2rem; color: var(--fg); font-weight: 600;
}

code {
  font-family: ui-monospace, "SF Mono", "Cascadia Code", Consolas, monospace;
  font-size: 0.92em; background: var(--card-2); border: 1px solid var(--border);
  padding: 0.08em 0.4em; border-radius: 5px; color: var(--accent);
}

/* ---- Header / Nav (fissa, sfocata) ---- */
.site-header {
  position: sticky; top: 0; z-index: 1000;
  background: rgba(10,10,10,0.92);
  -webkit-backdrop-filter: blur(10px); backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border);
}
.site-header .wrap { display: flex; align-items: center; justify-content: space-between; gap: 1rem; padding-block: 0.9rem; }
.brand { font-weight: 800; font-size: 1.2rem; color: var(--fg); text-decoration: none; letter-spacing: -0.02em; }
.brand::after { content: "."; color: var(--accent); }
.nav { display: flex; gap: 1.4rem; align-items: center; flex-wrap: wrap; font-size: 0.95rem; }
.nav a { text-decoration: none; color: var(--muted); font-weight: 500; }
.nav a:hover, .nav a[aria-current="page"] { color: var(--accent); }
.lang { border: 1px solid var(--border); border-radius: 999px; padding: 0.15rem 0.7rem; font-size: 0.85rem; }
.lang:hover { border-color: var(--accent); }

/* ---- Hero ---- */
.hero { position: relative; overflow: hidden; padding-block: clamp(3.5rem, 9vw, 7rem); }
.hero-grid { display: flex; align-items: center; gap: clamp(1.4rem, 4vw, 2.4rem); }
.hero-text { min-width: 0; }
.hero-logo { display: block; flex-shrink: 0; width: clamp(150px, 30vw, 220px); height: auto; }
@media (max-width: 36rem) {
  .hero-grid { flex-direction: column; align-items: flex-start; }
}
.hero::before {
  content: ""; position: absolute; top: -60%; left: 50%; transform: translateX(-50%);
  width: 140%; height: 160%;
  background: radial-gradient(circle, var(--glow) 0%, transparent 60%);
  opacity: 0.5; pointer-events: none; z-index: 0;
  animation: pulse 8s ease-in-out infinite;
}
.hero .wrap { position: relative; z-index: 1; }
@keyframes pulse { 0%,100% { transform: translateX(-50%) scale(1); opacity: 0.4; } 50% { transform: translateX(-50%) scale(1.1); opacity: 0.6; } }

/* ---- Griglia principi (card con glow) ---- */
.cards { display: grid; gap: 1.2rem; grid-template-columns: 1fr; margin: 1.8rem 0 0; padding: 0; list-style: none; }
@media (min-width: 40rem) { .cards { grid-template-columns: 1fr 1fr; } }
.card {
  position: relative; overflow: hidden;
  border: 1px solid var(--border); border-radius: 14px; padding: 1.4rem 1.4rem;
  background: var(--card); transition: transform 0.3s ease, border-color 0.3s ease, box-shadow 0.3s ease;
}
.card::before {
  content: ""; position: absolute; top: 0; left: 0; width: 100%; height: 3px;
  background: linear-gradient(90deg, var(--accent) 0%, var(--accent-alt) 100%);
  transform: scaleX(0); transform-origin: left; transition: transform 0.3s ease;
}
.card:hover { transform: translateY(-5px); border-color: var(--accent); box-shadow: 0 12px 30px var(--glow); }
.card:hover::before { transform: scaleX(1); }
.card a.card-title { font-size: 1.25rem; font-weight: 700; text-decoration: none; color: var(--fg); display: inline-block; margin-bottom: 0.3rem; }
.card a.card-title:hover { color: var(--accent); }
.card .num { font-size: 0.8rem; font-weight: 700; color: var(--accent); letter-spacing: 0.1em; }
.card p { margin: 0.3rem 0 0; color: var(--muted); font-size: 0.98rem; }

/* ---- Callout ---- */
.callout { background: var(--card); border: 1px solid var(--border); border-left: 3px solid var(--accent); border-radius: 12px; padding: 1.4rem 1.5rem; }
.callout .kicker { margin-bottom: 0.5rem; }

/* ---- Tabella ---- */
table { border-collapse: collapse; width: 100%; font-size: 0.95rem; margin: 1.4em 0; }
th, td { text-align: left; padding: 0.6rem 0.8rem; border-bottom: 1px solid var(--border); }
th { font-size: 0.8rem; text-transform: uppercase; letter-spacing: 0.06em; color: var(--accent); font-weight: 600; }
td { color: var(--text); }

/* ---- Matematica ---- */
.eq { margin: 1.6em 0; padding: 1.2rem 1rem; background: var(--card); border: 1px solid var(--border); border-radius: 12px; overflow-x: auto; }
.eq math { font-size: 1.25rem; display: block; margin-inline: auto; color: var(--fg); }
.eq-label { display: block; text-align: right; font-size: 0.8rem; color: var(--muted); margin-top: 0.5rem; font-variant-numeric: tabular-nums; }
math { color: var(--fg); }
dl.vars { margin: 1.3em 0; }
dl.vars dt { font-weight: 700; color: var(--fg); margin-bottom: 0.1rem; }
dl.vars dt math { font-size: 1.05rem; }
dl.vars dd { margin: 0.1rem 0 1rem; color: var(--muted); }

/* ---- Footer ---- */
.site-footer { border-top: 1px solid var(--border); background: #0c0c0c; padding-block: 2.5rem; }
.footer-verify { width: 100%; max-width: 72rem; margin-inline: auto; padding-inline: 1.25rem; padding-bottom: 1.6rem; margin-bottom: 1.6rem; border-bottom: 1px solid var(--border); }
.footer-verify .kicker { margin-bottom: 0.4rem; }
.footer-verify > p { margin: 0 0 0.7rem; color: var(--muted); font-size: 0.92rem; max-width: 46rem; }
.footer-verify ul { list-style: none; padding: 0; margin: 0; display: flex; flex-wrap: wrap; gap: 0.5rem 1.5rem; font-size: 0.9rem; }
.footer-verify li { margin: 0; }
.footer-verify a { color: var(--muted); text-decoration: none; }
.footer-verify a:hover { color: var(--accent); }
.site-footer .wrap { display: flex; flex-wrap: wrap; gap: 1rem 2rem; justify-content: space-between; align-items: baseline; }
.site-footer p { margin: 0; color: var(--muted); }

/* ---- Utility ---- */
.skip { position: absolute; left: -999px; top: 0; background: var(--accent); color: var(--bg); padding: 0.6rem 1rem; z-index: 1100; font-weight: 700; border-radius: 0 0 6px 0; }
.skip:focus { left: 0; top: 0; }
:focus-visible { outline: 3px solid var(--accent); outline-offset: 2px; border-radius: 2px; }
.muted { color: var(--muted); }
hr { border: 0; border-top: 1px solid var(--border); margin: 2.2rem 0; }
ul.clean { list-style: none; padding: 0; }
main ul:not(.cards):not(.clean) li { margin-bottom: 0.4em; }
.breadcrumb { font-size: 0.88rem; color: var(--muted); margin: 0 0 1.5rem; }
.breadcrumb a { color: var(--muted); text-decoration: none; }
.breadcrumb a:hover { color: var(--accent); }

/* ---- Roadmap / timeline ---- */
.timeline { position: relative; padding-left: 2.3rem; margin: 2rem 0; }
.timeline::before { content: ""; position: absolute; left: 0.45rem; top: 0.4rem; bottom: 0.4rem; width: 2px; background: var(--border); }
.tl-item { position: relative; margin-bottom: 1.4rem; background: var(--card); border: 1px solid var(--border); border-radius: 12px; padding: 1.1rem 1.3rem; }
.tl-item::before { content: ""; position: absolute; left: -2.3rem; top: 1.35rem; width: 14px; height: 14px; border-radius: 50%; background: var(--bg); border: 3px solid var(--muted); }
.tl-item.done::before { background: var(--accent); border-color: var(--accent); }
.tl-item.now::before { background: var(--accent-alt); border-color: var(--accent-alt); box-shadow: 0 0 0 4px rgba(255,170,0,0.20); }
.tl-date { font-size: 0.85rem; color: var(--accent); font-weight: 600; font-variant-numeric: tabular-nums; }
.tl-item.now .tl-date { color: var(--accent-alt); }
.tl-title { font-size: 1.15rem; font-weight: 700; color: var(--fg); margin: 0.15rem 0 0; }
.tl-status { display: inline-block; font-size: 0.7rem; text-transform: uppercase; letter-spacing: 0.08em; padding: 0.1rem 0.5rem; border-radius: 999px; border: 1px solid var(--border); color: var(--muted); margin-left: 0.5rem; vertical-align: 0.12em; }
.tl-item.done .tl-status { color: var(--accent); border-color: var(--accent); }
.tl-item.now .tl-status { color: var(--accent-alt); border-color: var(--accent-alt); }
.tl-item p { margin: 0.5rem 0 0; color: var(--muted); }
figure.shot { margin: 1rem 0 0; }
figure.shot img { width: 100%; height: auto; border: 1px solid var(--border); border-radius: 8px; display: block; }
figure.shot figcaption { font-size: 0.82rem; color: var(--muted); margin-top: 0.4rem; }

/* ---- Movimento ridotto ---- */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation: none !important; transition: none !important; scroll-behavior: auto !important; }
  .card:hover { transform: none; }
}