/* ==========================================================================
   gammaexposure.it — sito companion della monografia
   Palette e caratteri ripresi dall'identita' Core Matrix del volume.
   Il carattere Lato è caricato solo con il consenso alle risorse esterne.
   ========================================================================== */

:root {
  --navy:    #0B1228;
  --navy2:   #16224B;
  --blue:    #1D2C5E;
  --cyan:    #00BCD4;
  --cyan-d:  #007786;
  --cyan-l:  #E4F7FA;
  --purple:  #6C5CE7;
  --purple-l:#EFEDFC;
  --grey:    #5B6273;
  --grey-l:  #8A90A0;
  --light:   #F4F8FF;
  --line:    #D9E0EC;
  --amber:   #B8860B;
  --green:   #1E7A5A;
  --link:    var(--cyan-d);

  --fg:      #14192B;
  --bg:      #FFFFFF;
  --bg-alt:  var(--light);
  --card:    #FFFFFF;
  --ombra:   0 1px 2px rgba(11,18,40,.06), 0 8px 24px rgba(11,18,40,.06);

  --sans: "Lato", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  --serif: "Iowan Old Style", "Palatino Linotype", Palatino, Georgia, serif;
  --mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, monospace;

  --gabbia: 1120px;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-tema="chiaro"]) {
    --fg:     #E8ECF6;
    --bg:     #0B1228;
    --bg-alt: #101a38;
    --card:   #131e40;
    --line:   #26325a;
    --grey:   #A8B0C4;
    --grey-l: #7C869E;
    --cyan-l: #10283a;
    --purple-l:#1b1b3d;
    --link:   #38D5E5;
    --ombra:  0 1px 2px rgba(0,0,0,.3), 0 8px 24px rgba(0,0,0,.35);
  }
}
:root[data-tema="scuro"] {
  --fg:     #E8ECF6;  --bg: #0B1228;  --bg-alt: #101a38;  --card: #131e40;
  --line:   #26325a;  --grey: #A8B0C4; --grey-l: #7C869E;
  --cyan-l: #10283a;  --purple-l: #1b1b3d;
  --link: #38D5E5;
  --ombra:  0 1px 2px rgba(0,0,0,.3), 0 8px 24px rgba(0,0,0,.35);
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; color-scheme: light dark; }

body {
  margin: 0;
  font-family: var(--sans);
  font-size: 17px;
  line-height: 1.65;
  color: var(--fg);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
}

img { max-width: 100%; }
.salta-contenuto {
  position: fixed; z-index: 100; top: 10px; left: 12px;
  padding: 10px 14px; border-radius: 8px; color: #071125;
  background: #fff; font-weight: 900; text-decoration: none;
  transform: translateY(-150%); transition: transform .15s ease;
}
.salta-contenuto:focus { transform: translateY(0); }
:focus-visible { outline: 3px solid var(--purple); outline-offset: 3px; }

.gabbia { max-width: var(--gabbia); margin: 0 auto; padding-inline: 24px; }

/* ---------------------------------------------------------------- testata */
header.sito {
  position: sticky; top: 0; z-index: 50;
  background: color-mix(in srgb, var(--bg) 88%, transparent);
  backdrop-filter: saturate(180%) blur(12px);
  border-bottom: 1px solid var(--line);
}
header.sito .gabbia {
  display: flex; align-items: center; gap: 24px;
  min-height: 64px; flex-wrap: wrap;
}
.marchio {
  font-weight: 900; letter-spacing: -.02em; font-size: 1.05rem;
  color: var(--fg); text-decoration: none; white-space: nowrap;
}
.marchio span { color: var(--link); }
nav.sito { margin-left: auto; display: flex; gap: 4px; flex-wrap: wrap; }
nav.sito a {
  color: var(--grey); text-decoration: none; font-size: .92rem; font-weight: 700;
  padding: 7px 12px; border-radius: 8px;
}
nav.sito a:hover { color: var(--fg); background: var(--bg-alt); }
nav.sito a[aria-current="page"] { color: var(--link); background: var(--cyan-l); }

/* ------------------------------------------------------------------- hero */
.hero {
  position: relative; overflow: hidden; color: #F7F9FE;
  background:
    radial-gradient(circle at 82% 30%, rgba(115,103,240,.18), transparent 27rem),
    linear-gradient(135deg, #071125 0%, #0C1834 70%, #101F43 100%);
  border-bottom: 1px solid #26375C;
}
.hero::before {
  content: "01"; position: absolute; right: clamp(-24px, 4vw, 64px); top: -86px;
  color: rgba(255,255,255,.025); font-weight: 900; font-size: clamp(18rem,38vw,38rem);
  line-height: 1; pointer-events: none;
}
.hero .gabbia {
  position: relative; display: grid; grid-template-columns: minmax(0,1fr) 330px;
  gap: clamp(48px,7vw,92px); align-items: center; padding-block: 78px;
}
.hero .gabbia > * { min-width: 0; }
.hero h1 {
  color: #F7F9FE; font-size: clamp(2.65rem, 5.6vw, 4.7rem);
  line-height: .98; letter-spacing: -.045em;
  margin: 0 0 18px; font-weight: 900;
}
.hero .occhiello {
  text-transform: uppercase; letter-spacing: .14em; font-size: .74rem;
  font-weight: 900; color: #30D2E3; margin-bottom: 18px;
}
.hero p.sommario { font-size: 1.17rem; color: #B8C3DB; margin: 0 0 30px; max-width: 45ch; }

.copertina {
  position: relative; aspect-ratio: 2 / 3; width: 100%; border-radius: 3px;
  box-shadow: 0 4px 10px rgba(0,0,0,.28), 0 32px 62px rgba(0,0,0,.46);
  overflow: hidden; background: #071125;
  transform: perspective(1100px) rotateY(-5deg) rotateX(1deg);
  transform-origin: left center;
  transition: transform .3s ease, box-shadow .3s ease;
}
.copertina::after {
  content: ""; position: absolute; inset: 0; pointer-events: none;
  background: linear-gradient(110deg, transparent 35%, rgba(255,255,255,.07) 49%, transparent 63%);
  transform: translateX(-90%); transition: transform .55s ease;
}
.copertina:hover { transform: perspective(1100px) rotateY(-1deg); box-shadow: 0 6px 14px rgba(0,0,0,.30), 0 38px 72px rgba(0,0,0,.52); }
.copertina:hover::after { transform: translateX(90%); }
.copertina img { width: 100%; height: 100%; object-fit: cover; display: block; }

.metriche-hero {
  display: grid; grid-template-columns: repeat(3,minmax(0,1fr)); gap: 18px;
  list-style: none; padding: 25px 0 0; margin: 30px 0 0;
  border-top: 1px solid rgba(255,255,255,.13); max-width: 620px;
}
.metriche-hero li { min-width: 0; }
.metriche-hero strong { display: block; color: #F7F9FE; font-size: 1.05rem; line-height: 1.2; }
.metriche-hero span { display: block; color: #8796B5; font-size: .74rem; line-height: 1.35; margin-top: 4px; }

/* ------------------------------------------------------------------ testo */
main { padding-block: 8px 72px; }
section.blocco { padding-block: 56px; border-bottom: 1px solid var(--line); }
section.blocco:last-of-type { border-bottom: 0; }

h1, h2 {
  font-size: clamp(1.45rem, 3vw, 1.95rem); letter-spacing: -.02em;
  margin: 0 0 8px; font-weight: 900;
}
.blocco > h1 { font-size: clamp(2rem,4vw,3rem); line-height: 1.08; }
h3 { font-size: 1.12rem; margin: 28px 0 8px; font-weight: 900; letter-spacing: -.01em; }
.sottotitolo { color: var(--grey); margin: 0 0 28px; max-width: 62ch; }
p { max-width: 68ch; }
a { color: var(--link); text-underline-offset: .16em; }
a:hover { color: var(--purple); }

/* ------------------------------------------------------------------ tesi */
.tesi {
  background: var(--navy); color: #fff; border-radius: 14px;
  padding: 34px 38px; margin: 8px 0 0;
}
.tesi p { max-width: 60ch; margin: 0 0 12px; font-size: 1.1rem; }
.tesi p:last-child { margin-bottom: 0; }
.tesi strong { color: var(--cyan); }

/* ----------------------------------------------------------------- schede */
.griglia { display: grid; gap: 18px; margin-top: 26px; }
.griglia.due   { grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); }
.griglia.tre   { grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); }

.scheda {
  background: var(--card); border: 1px solid var(--line); border-radius: 12px;
  padding: 22px 24px; box-shadow: var(--ombra);
}
.scheda { transition: transform .18s ease, box-shadow .18s ease, border-color .18s ease; }
.scheda:hover { transform: translateY(-2px); border-color: color-mix(in srgb,var(--cyan) 45%,var(--line)); }
.scheda h3 { margin-top: 0; }
.scheda p  { margin: 0; color: var(--grey); font-size: .95rem; }
.scheda .num {
  font-size: 2rem; font-weight: 900; letter-spacing: -.03em;
  color: var(--link); line-height: 1; margin-bottom: 6px;
}

/* ------------------------------------------------------------------ parti */
ol.parti { list-style: none; counter-reset: p; padding: 0; margin: 26px 0 0; }
ol.parti li {
  counter-increment: p; display: grid; grid-template-columns: 52px 1fr;
  grid-template-areas: "n titolo" "n testo"; column-gap: 18px; row-gap: 4px;
  padding: 16px 0; border-top: 1px solid var(--line);
}
ol.parti li::before { grid-area: n; }
ol.parti b { grid-area: titolo; }
ol.parti span { grid-area: testo; }
ol.parti li::before {
  content: counter(p, upper-roman);
  font-weight: 900; color: var(--cyan-d); font-size: 1.05rem; padding-top: 1px;
}
ol.parti b { display: block; }
ol.parti span { color: var(--grey); font-size: .95rem; }

/* --------------------------------------------------------------- tabelle */
table.dati {
  width: 100%; border-collapse: collapse; margin-top: 22px; font-size: .93rem;
}
table.dati th {
  text-align: left; background: var(--navy); color: #fff; font-weight: 700;
  padding: 11px 14px; white-space: nowrap;
}
table.dati th:first-child { border-radius: 8px 0 0 0; }
table.dati th:last-child  { border-radius: 0 8px 0 0; }
table.dati td { padding: 11px 14px; border-bottom: 1px solid var(--line); vertical-align: top; }
table.dati tbody tr:nth-child(even) { background: var(--bg-alt); }
table.dati code { font-size: .88em; }
.tabella-scroll { overflow-x: auto; }

code, kbd {
  font-family: var(--mono); font-size: .88em;
  background: var(--bg-alt); border: 1px solid var(--line);
  border-radius: 5px; padding: 1px 6px;
}
pre {
  background: var(--navy); color: #DCE4F5; border-radius: 10px;
  padding: 18px 20px; overflow-x: auto; font-family: var(--mono);
  font-size: .87rem; line-height: 1.6;
}
pre code { background: none; border: 0; padding: 0; color: inherit; }

/* -------------------------------------------------------------- bottoni */
.bottoni { display: flex; gap: 12px; flex-wrap: wrap; margin-top: 4px; }
.btn {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 12px 22px; border-radius: 10px; font-weight: 800; font-size: .95rem;
  text-decoration: none; border: 1px solid transparent; white-space: nowrap;
}
.btn.primario { background: var(--cyan-d); color: #fff; }
.btn.primario:hover { background: var(--purple); color: #fff; }
.btn.secondario { background: transparent; color: var(--fg); border-color: var(--line); }
.btn.secondario:hover { border-color: var(--link); color: var(--link); }
.btn.secondario.su-scuro { color: #F7F9FE; border-color: #34466E; }
.btn.secondario.su-scuro:hover { color: #30D2E3; border-color: #30D2E3; background: rgba(255,255,255,.04); }

/* -------------------------------------------------------------- avvisi */
.nota {
  border-left: 3px solid var(--cyan); background: var(--cyan-l);
  padding: 16px 20px; border-radius: 0 10px 10px 0; margin: 26px 0;
}
.nota.viola { border-left-color: var(--purple); background: var(--purple-l); }
.nota p { margin: 0; max-width: 64ch; }
.nota p + p { margin-top: 10px; }

.vuoto {
  text-align: center; color: var(--grey-l); padding: 52px 20px;
  border: 1px dashed var(--line); border-radius: 12px; margin-top: 26px;
}
.vuoto strong { display: block; color: var(--grey); margin-bottom: 6px; }

.callout-acquisto {
  display: flex; align-items: center; justify-content: space-between; gap: 30px;
  padding: 28px 30px; margin-top: 26px; border: 1px solid var(--line);
  border-radius: 14px; background: var(--bg-alt);
}
.callout-acquisto h3 { margin: 7px 0 4px; }
.callout-acquisto p { margin: 0; color: var(--grey); }
.stato {
  display: inline-block; padding: 4px 9px; border-radius: 999px;
  color: var(--link); background: var(--cyan-l); font-size: .72rem;
  font-weight: 900; letter-spacing: .06em; text-transform: uppercase;
}
.serie { position: relative; overflow: hidden; }
.serie::after {
  content: "01"; position: absolute; right: 1rem; bottom: -2.2rem;
  color: color-mix(in srgb,var(--cyan) 10%,transparent); font-size: 9rem;
  font-weight: 900; line-height: 1; pointer-events: none;
}
.serie > * { position: relative; z-index: 1; }
.serie .occhiello { color: var(--link); font-size: .72rem; font-weight: 900; letter-spacing: .14em; text-transform: uppercase; }

/* ------------------------------------------------------------------- pie */
footer.sito {
  background: var(--navy); color: #B9C2D8; padding-block: 52px; font-size: .92rem;
}
footer.sito a { color: var(--cyan); }
footer.sito .gabbia { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px,1fr)); gap: 32px; }
footer.sito h4 { color: #fff; font-size: .82rem; text-transform: uppercase;
  letter-spacing: .12em; margin: 0 0 12px; }
footer.sito ul { list-style: none; padding: 0; margin: 0; }
footer.sito li { margin-bottom: 7px; }
footer.sito .chiusa {
  border-top: 1px solid rgba(255,255,255,.1); margin-top: 36px; padding-top: 22px;
  font-size: .85rem; color: #8A93AC; grid-column: 1 / -1;
}
.link-piede, .link-inline {
  appearance: none; border: 0; padding: 0; font: inherit; color: var(--cyan);
  background: transparent; text-decoration: underline; cursor: pointer;
}
.link-inline { color: var(--link); }

/* --------------------------------------------------------- consenso */
.consenso-banner {
  position: fixed; z-index: 200; left: 20px; right: 20px; bottom: 20px;
  max-width: 1120px; margin-inline: auto; display: flex; align-items: center;
  justify-content: space-between; gap: 28px; padding: 22px 24px;
  border: 1px solid var(--line); border-radius: 14px; color: var(--fg);
  background: var(--card); box-shadow: 0 18px 60px rgba(7,17,37,.24);
}
.consenso-banner[hidden] { display: none; }
.consenso-banner strong { display: block; font-size: 1.05rem; margin-bottom: 4px; }
.consenso-banner p { margin: 0; max-width: 70ch; color: var(--grey); font-size: .92rem; }
.consenso-banner__azioni {
  display: flex; flex-wrap: wrap; justify-content: flex-end; gap: 9px;
  min-width: 360px;
}
.consenso-banner .btn { min-height: 42px; }

.consenso-dialogo {
  width: min(680px, calc(100% - 32px)); padding: 0; color: var(--fg);
  background: var(--card); border: 1px solid var(--line); border-radius: 16px;
  box-shadow: 0 24px 80px rgba(7,17,37,.32);
}
.consenso-dialogo::backdrop {
  background: rgba(7,17,37,.64); backdrop-filter: blur(3px);
}
.consenso-dialogo form { padding: 28px; }
.consenso-dialogo__testata {
  display: flex; justify-content: space-between; gap: 20px; align-items: flex-start;
}
.consenso-dialogo h2 { margin: 2px 0 10px; }
.dialogo-chiudi {
  width: 42px; height: 42px; flex: 0 0 42px; border: 1px solid var(--line);
  border-radius: 50%; font-size: 1.65rem; line-height: 1; color: var(--fg);
  background: var(--bg-alt); cursor: pointer;
}
.categoria-consenso {
  display: flex; align-items: center; justify-content: space-between; gap: 20px;
  padding: 18px 0; border-top: 1px solid var(--line);
}
.categoria-consenso strong, .categoria-consenso span { display: block; }
.categoria-consenso > div span {
  margin-top: 3px; color: var(--grey); font-size: .87rem;
}
.interruttore {
  min-width: 112px; color: var(--grey); font-size: .86rem;
  font-weight: 700; cursor: pointer;
}
.interruttore input {
  width: 20px; height: 20px; margin-right: 7px;
  accent-color: var(--cyan-d); vertical-align: middle;
}
.consenso-dettagli { font-size: .86rem; color: var(--grey); }
.consenso-dialogo__azioni {
  display: flex; justify-content: flex-end; flex-wrap: wrap;
  gap: 10px; margin-top: 24px;
}
.documento-legale h2 { margin-top: 2.2em; }
.documento-legale table { min-width: 720px; }

/* ----------------------------------------------------------- responsive */
@media (max-width: 860px) {
  header.sito .gabbia { gap: 0; padding-top: 10px; }
  .marchio { padding-bottom: 8px; }
  nav.sito {
    width: calc(100% + 48px); margin: 0 -24px; padding: 0 24px 9px;
    flex-wrap: nowrap; overflow-x: auto; overscroll-behavior-inline: contain;
    scrollbar-width: none;
  }
  nav.sito::-webkit-scrollbar { display: none; }
  nav.sito a { flex: 0 0 auto; }
  .hero .gabbia { grid-template-columns: minmax(0,1fr); gap: 48px; padding-block: 58px; }
  .copertina { max-width: 280px; justify-self: center; }
  .callout-acquisto { align-items: flex-start; flex-direction: column; }
}
@media (max-width: 520px) {
  body { font-size: 16px; }
  .gabbia { padding-inline: 20px; }
  nav.sito { width: calc(100% + 40px); margin-inline: -20px; padding-inline: 20px; }
  .hero .gabbia { padding-block: 46px 58px; }
  .hero h1 { font-size: clamp(2.45rem,13.5vw,3.35rem); }
  .hero p.sommario { font-size: 1.06rem; }
  .hero .bottoni { align-items: stretch; flex-direction: column; }
  .hero .btn { justify-content: center; width: 100%; white-space: normal; }
  .metriche-hero { gap: 10px; }
  .metriche-hero strong { font-size: .95rem; }
  .metriche-hero span { font-size: .68rem; }
  .copertina { max-width: 250px; transform: none; }
  .tesi { padding: 24px 22px; }
  ol.parti li { grid-template-columns: 38px 1fr; gap: 12px; }
  .callout-acquisto { padding: 22px 20px; }
  .callout-acquisto .btn { width: 100%; justify-content: center; white-space: normal; }
  .consenso-banner {
    left: 10px; right: 10px; bottom: 10px; padding: 18px; display: block;
    max-height: calc(100vh - 20px); overflow-y: auto;
  }
  .consenso-banner__azioni {
    min-width: 0; margin-top: 16px; display: grid; grid-template-columns: 1fr;
  }
  .consenso-banner .btn { width: 100%; justify-content: center; }
  .consenso-dialogo form { padding: 22px 18px; }
  .categoria-consenso { align-items: flex-start; }
  .consenso-dialogo__azioni {
    display: grid; grid-template-columns: 1fr;
  }
  .consenso-dialogo__azioni .btn {
    width: 100%; justify-content: center;
  }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { transition-duration: .01ms !important; }
  .copertina { transform: none; }
}

/* =========================================================== strumenti */
.strumento {
  background: var(--card); border: 1px solid var(--line); border-radius: 14px;
  padding: 26px 28px; box-shadow: var(--ombra); margin-top: 26px;
}
.campi {
  display: grid; grid-template-columns: repeat(auto-fit, minmax(130px, 1fr));
  gap: 14px 18px; margin-bottom: 22px;
}
.campo label {
  display: block; font-size: .74rem; font-weight: 900; letter-spacing: .06em;
  text-transform: uppercase; color: var(--grey); margin-bottom: 5px;
}
.campo input, .campo select, .strumento textarea {
  width: 100%; font: inherit; font-size: .95rem; color: var(--fg);
  background: var(--bg); border: 1px solid var(--line); border-radius: 8px;
  padding: 9px 11px;
}
.campo input:focus, .campo select:focus, .strumento textarea:focus {
  outline: 2px solid var(--cyan); outline-offset: 1px; border-color: var(--cyan);
}
.strumento textarea {
  font-family: var(--mono); font-size: .86rem; line-height: 1.55;
  min-height: 190px; resize: vertical;
}

.risultati {
  display: grid; grid-template-columns: repeat(auto-fit, minmax(190px, 1fr));
  gap: 0; border: 1px solid var(--line); border-radius: 10px; overflow: hidden;
}
.ris { background: var(--card); padding: 15px 17px;
  border-right: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.ris:last-child { border-right: 0; }
.ris b {
  display: block; font-size: 1.28rem; font-weight: 900; letter-spacing: -.02em;
  line-height: 1.25; margin-bottom: 3px;
}
.ris span { font-size: .8rem; color: var(--grey); line-height: 1.4; display: block; }
.ris.marcato { background: var(--cyan-l); }
.ris.marcato b { color: var(--link); }
.ris.verde b { color: var(--green); }
.ris.rosso b { color: #C0392B; }

.didascalia { font-size: .87rem; color: var(--grey); margin: 16px 0 0; max-width: 74ch; }
.errore { color: #C0392B; font-size: .88rem; margin: 10px 0 0; font-weight: 700; }

canvas.grafico {
  width: 100%; height: 300px; display: block; margin-top: 22px;
  border: 1px solid var(--line); border-radius: 10px; background: var(--bg);
}
.legenda-assi {
  font-size: .78rem; color: var(--grey-l); margin: 8px 0 0; text-align: center;
}
@media (max-width: 520px) {
  .strumento { padding: 20px 18px; }
  canvas.grafico { height: 240px; }
}