/* ============================================================
   SLEEPTECH — design system v1
   Identità: rivista scientifica / quaderno di laboratorio.
   Palette "paper & pine": carta calda, inchiostro verde-nero,
   verde pino come accento. Font di sistema (niente richieste
   esterne: performance + GDPR by design).
   NB: volutamente DISTINTO dal design system Amakea
   (midnight/cream/teal, Instrument Serif + Space Grotesk).
   ============================================================ */

:root {
  /* Colori */
  --paper: #F6F3EB;
  --paper-2: #EFEADF;
  --card: #FFFFFF;
  --ink: #17251D;
  --ink-2: #4C5A50;
  --pine: #1F5B45;
  --pine-deep: #143D2F;
  --leaf: #3E8E6C;
  --sand: #B08A3E;
  --slate: #5B6770;
  --sage: #93A99B;
  --line: #DDD6C4;
  --line-soft: #E7E1D2;

  /* Tipografia */
  --serif: "Iowan Old Style", "Palatino Linotype", Palatino, Georgia, "Times New Roman", serif;
  --sans: system-ui, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  --mono: "Cascadia Mono", Consolas, "SF Mono", ui-monospace, Menlo, monospace;

  --maxw: 1080px;
  --maxw-text: 46rem;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
}

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--serif);
  font-size: 19px;
  line-height: 1.68;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

img, svg { max-width: 100%; height: auto; }

a { color: var(--pine); text-decoration-thickness: 1px; text-underline-offset: 3px; }
a:hover { color: var(--pine-deep); }
:focus-visible { outline: 2px solid var(--pine); outline-offset: 3px; border-radius: 2px; }

/* ---------- Utility ---------- */
.wrap { max-width: var(--maxw); margin: 0 auto; padding: 0 20px; }
.eyebrow {
  font-family: var(--mono);
  font-size: 13px;
  letter-spacing: .22em;
  text-transform: uppercase;
  color: var(--pine);
}
.small { font-size: 15px; color: var(--ink-2); }

/* ---------- Header ---------- */
.site-header {
  position: sticky; top: 0; z-index: 50;
  background: color-mix(in srgb, var(--paper) 92%, transparent);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--line);
}
.nav {
  display: flex; align-items: center; gap: 18px;
  max-width: var(--maxw); margin: 0 auto; padding: 12px 20px;
}
.brand { display: flex; align-items: center; gap: 11px; text-decoration: none; color: var(--ink); margin-right: auto; }
.brand svg { width: 34px; height: 34px; display: block; }
.brand-name {
  font-family: var(--serif); font-weight: 700;
  font-size: 19px; letter-spacing: .16em;
}
.brand-name span { color: var(--pine); }
.nav-links { display: none; align-items: center; gap: 20px; }
.nav-links a {
  font-family: var(--sans); font-size: 14.5px; letter-spacing: .02em;
  color: var(--ink); text-decoration: none;
}
.nav-links a:hover { color: var(--pine); }
.lang-switch {
  font-family: var(--mono); font-size: 12.5px; letter-spacing: .12em;
  border: 1px solid var(--line); border-radius: 3px;
  padding: 6px 10px; text-decoration: none; color: var(--ink-2);
  background: var(--card);
}
.lang-switch:hover { border-color: var(--pine); color: var(--pine); }
.nav-toggle {
  display: inline-flex; flex-direction: column; gap: 4px;
  background: none; border: 1px solid var(--line); border-radius: 3px;
  padding: 9px 8px; cursor: pointer;
}
.nav-toggle span { width: 18px; height: 2px; background: var(--ink); display: block; }
.mobile-menu { display: none; border-top: 1px solid var(--line); background: var(--paper); }
.mobile-menu.open { display: block; }
.mobile-menu a {
  display: block; padding: 13px 20px;
  font-family: var(--sans); font-size: 16px; text-decoration: none; color: var(--ink);
  border-bottom: 1px solid var(--line-soft);
}
@media (min-width: 880px) {
  .nav-links { display: flex; }
  .nav-toggle { display: none; }
  .mobile-menu { display: none !important; }
}

/* ---------- Hero ---------- */
.hero {
  position: relative;
  padding: 72px 0 56px;
  background:
    linear-gradient(var(--paper) 0%, rgba(246,243,235,0) 30%, rgba(246,243,235,0) 70%, var(--paper) 100%),
    repeating-linear-gradient(0deg, rgba(23,37,29,.045) 0 1px, transparent 1px 34px),
    repeating-linear-gradient(90deg, rgba(23,37,29,.045) 0 1px, transparent 1px 34px),
    var(--paper);
}
.hero h1 {
  font-size: clamp(34px, 5.4vw, 58px);
  line-height: 1.12;
  letter-spacing: -0.012em;
  margin: 18px 0 22px;
  max-width: 21ch;
  font-weight: 700;
}
.hero h1 em { font-style: italic; color: var(--pine); }
.hero .lead {
  font-size: clamp(19px, 2.2vw, 22px);
  max-width: var(--maxw-text);
  color: var(--ink-2);
  margin: 0 0 30px;
}
.cta-row { display: flex; flex-wrap: wrap; gap: 14px; margin-bottom: 8px; }
.btn {
  display: inline-block; padding: 13px 22px; border-radius: 3px;
  font-family: var(--sans); font-size: 16px; font-weight: 600;
  text-decoration: none; border: 1px solid transparent;
}
.btn-solid { background: var(--pine); color: #fff; }
.btn-solid:hover { background: var(--pine-deep); color: #fff; }
.btn-ghost { border-color: var(--ink); color: var(--ink); background: transparent; }
.btn-ghost:hover { border-color: var(--pine); color: var(--pine); }

/* Stat strip */
.stats {
  display: grid; grid-template-columns: 1fr 1fr; gap: 1px;
  background: var(--line); border: 1px solid var(--line); border-radius: 4px;
  overflow: hidden; margin-top: 44px;
}
@media (min-width: 880px) { .stats { grid-template-columns: repeat(4, 1fr); } }
.stat { background: var(--card); padding: 20px 18px 16px; }
.stat .n {
  font-family: var(--serif); font-weight: 700;
  font-size: clamp(26px, 3vw, 34px); line-height: 1.1; color: var(--ink);
  display: block; font-variant-numeric: lining-nums tabular-nums;
}
.stat .n .unit { font-size: .58em; font-weight: 400; color: var(--ink-2); letter-spacing: 0; }
.stat .d {
  font-family: var(--sans); font-size: 13.5px; color: var(--ink-2);
  display: block; margin-top: 6px; line-height: 1.45;
}

/* Riga incubatore sotto le statistiche dell'hero */
.hero .incubator { margin: 18px 0 0; font-family: var(--sans); font-size: 15px; color: var(--ink-2); }

/* ---------- Sezioni ---------- */
.section { padding: 64px 0 30px; }
.section + .section { border-top: 1px solid var(--line); }
.sec-head { margin-bottom: 30px; }
.sec-num {
  font-family: var(--mono); font-size: 14px; letter-spacing: .3em;
  color: var(--pine);
}
.sec-head h2 {
  font-size: clamp(27px, 3.6vw, 40px);
  line-height: 1.15; letter-spacing: -0.01em;
  margin: 10px 0 12px; max-width: 26ch;
}
.sec-sub { max-width: var(--maxw-text); color: var(--ink-2); margin: 0; font-size: 19px; }
.prose { max-width: var(--maxw-text); }
.prose p { margin: 0 0 20px; }
.prose strong { font-weight: 700; }

/* Riferimenti bibliografici in apice */
sup.ref { line-height: 0; }
sup.ref a {
  font-family: var(--mono); font-size: .62em; text-decoration: none;
  color: var(--pine); padding: 0 1px;
}
sup.ref a:hover { text-decoration: underline; }

/* ---------- Figure ---------- */
.fig {
  margin: 34px 0; padding: 22px 20px 14px;
  background: var(--card);
  border: 1px solid var(--line); border-radius: 4px;
}
.fig svg { display: block; width: 100%; height: auto; }
.fig figcaption {
  margin-top: 14px; padding-top: 12px; border-top: 1px solid var(--line-soft);
  font-family: var(--sans); font-size: 14px; color: var(--ink-2); line-height: 1.5;
}
.fig .fig-label {
  font-family: var(--mono); font-size: 12.5px; letter-spacing: .14em;
  color: var(--pine); text-transform: uppercase; margin-right: 8px;
}
.fig .fig-src { display: block; margin-top: 4px; font-size: 13px; color: #6B7A70; }
.fig-cols { display: grid; gap: 0 26px; }
@media (min-width: 940px) { .fig-cols { grid-template-columns: 1fr 1fr; align-items: start; } }

/* ---------- Card griglie (principi, workstream) ---------- */
.cards { display: grid; gap: 16px; margin: 30px 0 10px; }
@media (min-width: 880px) { .cards { grid-template-columns: repeat(3, 1fr); } }
@media (min-width: 880px) { .cards.cols-4 { grid-template-columns: repeat(2, 1fr); } }
@media (min-width: 1080px) { .cards.cols-4 { grid-template-columns: repeat(4, 1fr); } }
.card {
  background: var(--card); border: 1px solid var(--line); border-radius: 4px;
  padding: 22px 20px 18px;
}
.card .k {
  font-family: var(--mono); font-size: 12.5px; letter-spacing: .18em;
  text-transform: uppercase; color: var(--pine);
}
.card h3 { font-size: 21px; margin: 10px 0 8px; line-height: 1.25; }
.card p { margin: 0; font-size: 16.5px; line-height: 1.55; color: var(--ink-2); }

/* ---------- Norme / standard ---------- */
.norm-list { list-style: none; padding: 0; margin: 26px 0 0; max-width: var(--maxw-text); }
.norm-list li {
  padding: 14px 0; border-top: 1px solid var(--line-soft);
  display: grid; grid-template-columns: 112px 1fr; gap: 14px; align-items: baseline;
}
.norm-list li:last-child { border-bottom: 1px solid var(--line-soft); }
.norm-list .tag { font-family: var(--mono); font-size: 13px; color: var(--pine); letter-spacing: .06em; }
.norm-list .txt { font-size: 16.5px; color: var(--ink); }
.norm-list .txt .sub { display: block; font-size: 14.5px; color: var(--ink-2); margin-top: 2px; }

/* ---------- Team ---------- */
.team { display: grid; gap: 16px; margin-top: 34px; }
@media (min-width: 720px) { .team { grid-template-columns: 1fr 1fr; } }
@media (min-width: 960px) { .team { grid-template-columns: repeat(3, 1fr); } }
.member {
  background: var(--card); border: 1px solid var(--line); border-radius: 4px;
  padding: 24px 22px 20px;
}
.member .ava {
  width: 52px; height: 52px; border-radius: 50%;
  background: var(--pine); color: #fff;
  display: flex; align-items: center; justify-content: center;
  font-family: var(--mono); font-size: 17px; letter-spacing: .05em;
  margin-bottom: 14px;
}
.member h3 { margin: 0 0 2px; font-size: 21.5px; }
.member .role {
  font-family: var(--mono); font-size: 12.5px; letter-spacing: .14em;
  text-transform: uppercase; color: var(--pine); display: block; margin-bottom: 10px;
}
.member p { margin: 0; font-size: 16.5px; line-height: 1.58; color: var(--ink-2); }
.member p a { color: var(--pine); }

/* ---------- Bibliografia ---------- */
.biblio { max-width: 52rem; padding-left: 0; margin: 26px 0 0; counter-reset: bib; list-style: none; }
.biblio li {
  counter-increment: bib;
  position: relative; padding: 10px 0 10px 52px;
  border-top: 1px solid var(--line-soft);
  font-size: 15.5px; font-family: var(--sans); color: var(--ink-2); line-height: 1.55;
}
.biblio li:last-child { border-bottom: 1px solid var(--line-soft); }
.biblio li::before {
  content: "[" counter(bib) "]";
  position: absolute; left: 0; top: 11px;
  font-family: var(--mono); font-size: 13.5px; color: var(--pine);
}
.biblio li em { color: var(--ink); font-style: italic; }
.biblio li a { word-break: break-word; }
.methodo {
  margin-top: 26px; padding: 16px 18px;
  background: var(--paper-2); border-left: 3px solid var(--pine); border-radius: 0 4px 4px 0;
  font-family: var(--sans); font-size: 14.5px; color: var(--ink-2); max-width: 52rem;
}

/* ---------- Banda contatti (ink) ---------- */
.contact {
  margin-top: 64px;
  background: var(--ink); color: var(--paper);
  padding: 64px 0;
}
.contact .eyebrow { color: var(--leaf); }
.contact h2 { font-size: clamp(26px, 3.4vw, 38px); margin: 12px 0 14px; max-width: 24ch; }
.contact p { max-width: var(--maxw-text); color: #C9D2CB; margin: 0 0 26px; }
.contact a.mail {
  font-family: var(--mono); font-size: clamp(17px, 2.4vw, 22px);
  color: var(--paper); text-decoration-color: var(--leaf);
}
.contact .btn-ghost { border-color: #5E6E64; color: var(--paper); }
.contact .btn-ghost:hover { border-color: var(--leaf); color: var(--leaf); }

/* ---------- Footer ---------- */
.site-footer {
  background: var(--ink); color: #93A29A;
  border-top: 1px solid #2A3A31;
  padding: 26px 0 34px;
  font-family: var(--sans); font-size: 13.5px;
}
.site-footer .cols {
  display: flex; flex-wrap: wrap; gap: 10px 26px;
  align-items: center; justify-content: space-between;
}
.site-footer a { color: #B8C4BC; }
.site-footer .legal { line-height: 1.6; }

/* ---------- Reveal on scroll ---------- */
.reveal { opacity: 0; transform: translateY(10px); transition: opacity .5s ease, transform .5s ease; }
.reveal.in { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) {
  .reveal { opacity: 1; transform: none; transition: none; }
}

/* ---------- Stampa ---------- */
@media print {
  .site-header, .cta-row, .contact .btn-ghost { display: none; }
  body { background: #fff; font-size: 12pt; }
  .fig { break-inside: avoid; }
}