/* SmartDocs — landing page ("apparato critico").
 *
 * L'impianto editoriale del prodotto incontra l'identita Smart Things: blu
 * ardesia, bordeaux desaturato, superfici calde, Inter per l'interfaccia e
 * dettagli morbidi. Il serif e il monospace restano la firma documentale.
 */

/* ---------------------------------------------------------------- token --- */

:root {
  --ink-900: #253341;
  --ink-800: #2e4052;
  --ink-700: #3f5264;
  --ink-500: #627384;
  --ink-300: #9aa7b2;

  --line: #e5e0dc;
  --line-soft: #eeeae7;
  --canvas: #fbfaf9;
  --surface: #ffffff;
  --surface-2: #f2f0ed;

  --accent: #8c5a6a;
  --accent-600: #9f687b;
  --accent-700: #704653;
  --accent-050: #f7eff2;
  --accent-rgb: 140, 90, 106;

  --font-display: "Spectral", Georgia, "Iowan Old Style", Cambria, ui-serif, serif;
  --font-body: "Inter", system-ui, -apple-system, "Segoe UI", Roboto, Arial, sans-serif;
  --font-ui: "Inter", system-ui, -apple-system, "Segoe UI", Roboto, Arial, sans-serif;
  --font-mono: "IBM Plex Mono", ui-monospace, SFMono-Regular, "Cascadia Code", Menlo, Consolas, monospace;

  --shell: 1160px;
  --gutter: clamp(1.25rem, 4vw, 3rem);
  --measure: 72ch;
  --mark-col: 10.5rem;
  --radius-sm: 0.6rem;
  --radius-md: 1rem;
  --radius-lg: 1.4rem;
  --shadow-soft: 0 18px 45px -32px rgba(37, 51, 65, 0.38);
  --shadow-card: 0 22px 50px -38px rgba(37, 51, 65, 0.42);

  color-scheme: light;
}

/* ----------------------------------------------------------------- base --- */

*,
*::before,
*::after { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--canvas);
  color: var(--ink-700);
  font-family: var(--font-body);
  font-size: 1rem;
  line-height: 1.7;
  font-feature-settings: "kern" 1, "liga" 1;
  -webkit-font-smoothing: antialiased;
}

p, li, dd { text-wrap: pretty; }

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

a { color: var(--accent-700); text-underline-offset: 3px; text-decoration-thickness: 1px; }
a:hover { color: var(--accent); }

:focus-visible {
  outline: 2px solid var(--accent-600);
  outline-offset: 3px;
  border-radius: 0.35rem;
}

.shell {
  max-width: var(--shell);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.skip {
  position: absolute;
  left: -9999px;
  top: 0;
  background: var(--surface);
  color: var(--ink-900);
  padding: 0.6rem 1rem;
  z-index: 100;
  font-family: var(--font-ui);
  border-radius: var(--radius-sm);
  box-shadow: var(--shadow-soft);
}
.skip:focus { left: 1rem; top: 1rem; }

/* --------------------------------------------------------- tipi comuni --- */

.eyebrow {
  font-family: var(--font-ui);
  font-size: 0.69rem;
  font-weight: 600;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--ink-500);
  margin: 0;
}

.h-sec {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: clamp(1.65rem, 3.1vw, 2.4rem);
  line-height: 1.14;
  letter-spacing: -0.012em;
  color: var(--ink-900);
  margin: 0.7rem 0 0;
  max-width: 32ch;
  text-wrap: balance;
}

.lead {
  font-size: clamp(1.075rem, 1.5vw, 1.2rem);
  line-height: 1.68;
  color: var(--ink-800);
  max-width: var(--measure);
  margin: 1.15rem 0 0;
}

.body {
  max-width: var(--measure);
  margin: 1.1rem 0 0;
  line-height: 1.72;
}

.note {
  font-family: var(--font-ui);
  font-size: 0.875rem;
  line-height: 1.6;
  color: var(--ink-500);
  max-width: var(--measure);
  margin: 1.6rem 0 0;
  padding: 0.9rem 1rem;
  border: 1px solid rgba(var(--accent-rgb), 0.18);
  border-radius: var(--radius-sm);
  background: rgba(var(--accent-rgb), 0.045);
}

/* --------------------------------------------------------------- azioni --- */

.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-family: var(--font-ui);
  font-size: 0.9rem;
  font-weight: 600;
  line-height: 1;
  padding: 0.86rem 1.35rem;
  border-radius: var(--radius-sm);
  border: 1px solid transparent;
  text-decoration: none;
  cursor: pointer;
  transition: transform 0.3s cubic-bezier(0.22, 1, 0.36, 1), box-shadow 0.3s ease,
    background-color 0.2s ease, border-color 0.2s ease, color 0.2s ease;
}

.btn--primary {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
  box-shadow: 0 14px 30px -18px rgba(var(--accent-rgb), 0.9);
}
.btn--primary:hover {
  background: var(--accent-700);
  border-color: var(--accent-700);
  color: #fff;
  transform: translateY(-2px);
  box-shadow: 0 18px 34px -18px rgba(var(--accent-rgb), 0.95);
}

.btn--ghost { background: transparent; border-color: rgba(255, 255, 255, 0.28); color: #e8eef4; }
.btn--ghost:hover { border-color: rgba(255, 255, 255, 0.6); color: #fff; }

.btn--quiet { background: transparent; border-color: var(--line); color: var(--ink-700); }
.btn--quiet:hover { border-color: var(--accent-600); color: var(--accent-700); }

/* ---------------------------------------------------------- navigazione --- */

.nav {
  position: sticky;
  top: 0;
  z-index: 40;
  border-bottom: 1px solid transparent;
  transition: background-color 0.3s ease, border-color 0.3s ease,
    backdrop-filter 0.3s ease, box-shadow 0.3s ease;
}

.nav__inner {
  display: flex;
  align-items: center;
  gap: 1.5rem;
  min-height: 4rem;
}

.nav__brand {
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  text-decoration: none;
  color: #fff;
  font-family: var(--font-ui);
  font-weight: 700;
  font-size: 1.02rem;
  letter-spacing: -0.025em;
  transition: color 0.25s ease;
}

.nav__links {
  display: flex;
  gap: 1.4rem;
  margin-left: auto;
  font-family: var(--font-ui);
  font-size: 0.76rem;
  font-weight: 500;
  letter-spacing: 0.02em;
}

.nav__links a {
  color: rgba(255, 255, 255, 0.66);
  text-decoration: none;
  padding: 0.35rem 0;
  border-bottom: 1px solid transparent;
  transition: color 0.2s ease, border-color 0.2s ease;
}
.nav__links a:hover { color: #fff; border-bottom-color: var(--accent-600); }

.nav__cta { margin-left: 0.4rem; padding: 0.6rem 1rem; }

.nav.is-stuck {
  background: rgba(251, 250, 249, 0.9);
  -webkit-backdrop-filter: blur(18px);
  backdrop-filter: blur(18px);
  border-bottom-color: rgba(229, 224, 220, 0.82);
  box-shadow: 0 10px 26px -24px rgba(37, 51, 65, 0.5);
}
.nav.is-stuck .nav__brand { color: var(--ink-900); }
.nav.is-stuck .nav__links a { color: var(--ink-500); }
.nav.is-stuck .nav__links a:hover { color: var(--ink-900); }
.nav.is-stuck .btn--ghost { border-color: var(--line); color: var(--ink-700); }
.nav.is-stuck .btn--ghost:hover { border-color: var(--accent-600); color: var(--accent-700); }

@media (max-width: 820px) {
  .nav__links { display: none; }
  .nav__cta { margin-left: auto; }
}

/* --------------------------------------------------------- frontespizio --- */

.front {
  position: relative;
  background: linear-gradient(135deg, #253341 0%, #2e4052 58%, #253341 100%);
  color: #dde6ee;
  margin-top: -4rem;
  padding-top: 4rem;
  overflow: hidden;
}

.front::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    radial-gradient(circle at 14% 18%, rgba(var(--accent-rgb), 0.18), transparent 25rem),
    radial-gradient(circle at 88% 78%, rgba(255, 255, 255, 0.075), transparent 24rem),
    repeating-linear-gradient(to right, rgba(255, 255, 255, 0.038) 0 1px, transparent 1px 96px),
    repeating-linear-gradient(to bottom, rgba(255, 255, 255, 0.03) 0 1px, transparent 1px 96px);
  pointer-events: none;
}

.front::after {
  content: "";
  position: absolute;
  width: 28rem;
  height: 28rem;
  right: -12rem;
  top: -10rem;
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: 50%;
  box-shadow: 0 0 0 5rem rgba(255, 255, 255, 0.018),
    0 0 0 10rem rgba(var(--accent-rgb), 0.022);
  pointer-events: none;
}

.front__grid {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(0, 25.5rem);
  gap: clamp(2rem, 5vw, 4.5rem);
  align-items: center;
  padding-block: clamp(3.5rem, 8vw, 6rem) clamp(3.5rem, 8vw, 5.5rem);
}

.front .eyebrow { color: #d8adbc; }

.front__title {
  font-family: var(--font-display);
  font-weight: 500;
  font-size: clamp(2.3rem, 5.6vw, 4rem);
  line-height: 1.04;
  letter-spacing: -0.025em;
  color: #fff;
  margin: 1.1rem 0 0;
  max-width: 19ch;
  text-wrap: balance;
}

.front__title em {
  font-style: italic;
  color: #d9a9ba;
}

.front__rule {
  width: 5rem;
  height: 3px;
  border-radius: 999px;
  background: linear-gradient(90deg, #b77d91, rgba(183, 125, 145, 0.18));
  margin: 1.9rem 0;
  transform-origin: left;
}

.front__sub {
  font-size: clamp(1.05rem, 1.6vw, 1.2rem);
  line-height: 1.62;
  color: rgba(221, 230, 238, 0.86);
  max-width: 54ch;
  margin: 0;
}

.front__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-top: 2.2rem;
}

.front__stamp {
  display: flex;
  flex-wrap: wrap;
  gap: 0.55rem;
  margin: 2.3rem 0 0;
  padding: 0;
  border: 0;
  font-family: var(--font-ui);
  font-size: 0.72rem;
  letter-spacing: 0.01em;
  color: rgba(225, 231, 236, 0.78);
  list-style: none;
}
.front__stamp li {
  padding: 0.46rem 0.72rem;
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.045);
  -webkit-backdrop-filter: blur(10px);
  backdrop-filter: blur(10px);
}
.front__stamp b { color: #fff; font-weight: 600; }

@media (max-width: 940px) {
  .front__grid { grid-template-columns: 1fr; }
  .front__title { max-width: 22ch; }
}

/* --------------------------------------- firma: la catena di citazione --- */

.cite {
  background: var(--surface);
  border: 1px solid rgba(255, 255, 255, 0.32);
  border-radius: var(--radius-lg);
  box-shadow: 0 32px 72px -34px rgba(12, 24, 36, 0.78);
  overflow: hidden;
  font-family: var(--font-ui);
}

.cite__bar {
  display: flex;
  align-items: center;
  gap: 0.55rem;
  padding: 0.72rem 1.15rem;
  background: rgba(242, 240, 237, 0.72);
  border-bottom: 1px solid var(--line);
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--ink-500);
}
.cite__dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--accent-600);
  flex: none;
}
.cite__demo { margin-left: auto; color: var(--ink-300); }

.cite__body { padding: 1.35rem 1.5rem 1.45rem; }

.cite__q {
  font-family: var(--font-mono);
  font-size: 0.74rem;
  line-height: 1.5;
  color: var(--ink-500);
  margin: 0 0 0.9rem;
  padding-bottom: 0.9rem;
  border-bottom: 1px dashed var(--line);
}
.cite__q span { color: var(--accent-700); }

.cite__answer {
  font-family: var(--font-display);
  font-size: 0.985rem;
  line-height: 1.68;
  color: var(--ink-800);
  margin: 0;
}

.chip {
  font-family: var(--font-mono);
  font-size: 0.66rem;
  font-weight: 500;
  line-height: 1;
  vertical-align: 0.32em;
  margin-left: 1px;
  padding: 0.24em 0.42em;
  border: 1px solid rgba(var(--accent-rgb), 0.35);
  border-radius: 999px;
  background: var(--accent-050);
  color: var(--accent-700);
  cursor: pointer;
  transition: background-color 0.16s ease, color 0.16s ease, border-color 0.16s ease;
}
.chip:hover { border-color: var(--accent-600); background: #f1e3e8; }
.chip.is-active { background: var(--accent); border-color: var(--accent); color: #fff; }
.chip.is-pulse { animation: pulse 0.5s ease; }

@keyframes pulse {
  50% { background: var(--accent-600); border-color: var(--accent-600); color: #fff; }
}

.cite__record {
  margin-top: 1.15rem;
  padding: 1rem;
  border: 1px solid var(--line-soft);
  border-radius: var(--radius-sm);
  background: rgba(242, 240, 237, 0.52);
}

.cite__recordTitle {
  font-family: var(--font-ui);
  font-weight: 600;
  font-size: 0.98rem;
  line-height: 1.35;
  color: var(--ink-900);
  margin: 0 0 0.7rem;
}

.cite__fields {
  display: grid;
  grid-template-columns: 6.2rem minmax(0, 1fr);
  gap: 0.32rem 0.7rem;
  margin: 0;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  line-height: 1.5;
}
.cite__fields dt { color: var(--ink-300); letter-spacing: 0.05em; }
.cite__fields dd { margin: 0; color: var(--ink-700); }
.cite__fields dd b { color: var(--accent-700); font-weight: 500; }

.cite__foot {
  display: flex;
  align-items: center;
  gap: 0.7rem;
  margin-top: 1.1rem;
  padding-top: 0.9rem;
  border-top: 1px dashed var(--line);
}

.cite__open {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  padding: 0.45rem 0.75rem;
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  background: var(--surface);
  color: var(--ink-700);
  cursor: default;
}

.cite__hint {
  font-family: var(--font-mono);
  font-size: 0.66rem;
  color: var(--ink-300);
  letter-spacing: 0.04em;
}

.is-swapping { opacity: 0; transform: translateY(4px); }
.cite__record { transition: opacity 0.2s ease, transform 0.2s ease; }

/* ----------------------------------------------- orientamento iniziale --- */

.priority {
  background: var(--surface);
  border-bottom: 1px solid var(--line);
}

.priority__grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.priority__item {
  display: grid;
  grid-template-columns: 2rem minmax(0, 1fr);
  gap: 0.85rem;
  padding: 1.45rem clamp(1rem, 2vw, 1.6rem);
  border-right: 1px solid var(--line);
  color: var(--ink-500);
  font-size: 0.82rem;
  line-height: 1.5;
  text-decoration: none;
  transition: background-color 0.25s ease, color 0.25s ease;
}
.priority__item:first-child { border-left: 1px solid var(--line); }
.priority__item:hover { background: var(--accent-050); color: var(--ink-700); }
.priority__item b {
  display: block;
  margin-bottom: 0.16rem;
  color: var(--ink-900);
  font-size: 0.92rem;
  font-weight: 600;
}
.priority__n {
  padding-top: 0.15rem;
  color: var(--accent-700);
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.08em;
}

@media (max-width: 760px) {
  .priority__grid { grid-template-columns: 1fr; padding-block: 0.4rem; }
  .priority__item {
    border-right: 0;
    border-bottom: 1px solid var(--line-soft);
    padding-block: 1rem;
  }
  .priority__item:first-child { border-left: 0; }
  .priority__item:last-child { border-bottom: 0; }
}

/* ------------------------------------------------ impaginato documento --- */

.band {
  border-top: 1px solid rgba(229, 224, 220, 0.76);
  padding-block: clamp(3.25rem, 7vw, 5.75rem);
}
.band--paper {
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.9), rgba(247, 245, 243, 0.78));
}
.band--tint { background: var(--surface-2); }

.doc {
  display: grid;
  grid-template-columns: var(--mark-col) minmax(0, 1fr);
  gap: clamp(1.5rem, 4vw, 3.5rem);
}

.doc__mark {
  position: sticky;
  top: 5.5rem;
  align-self: start;
  padding: 0.65rem 0 0.65rem 0.9rem;
  border-left: 2px solid var(--accent);
  font-family: var(--font-mono);
  font-size: 0.7rem;
  line-height: 1.9;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--ink-300);
}
.doc__num { display: block; color: var(--accent-700); font-weight: 600; }
.doc__key { display: block; }

@media (max-width: 900px) {
  .doc { grid-template-columns: 1fr; gap: 1.1rem; }
  .doc__mark {
    position: static;
    display: flex;
    flex-wrap: wrap;
    gap: 0 0.9rem;
    line-height: 1.6;
    padding-block: 0.45rem;
  }
  .doc__num { display: inline; }
}

/* ---------------------------------------------------------- § ostacoli --- */

.hurdles {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(15rem, 1fr));
  gap: 1rem;
  margin-top: 2.4rem;
}

.hurdle {
  padding: 1.25rem 1.3rem 1.35rem;
  border: 1px solid rgba(229, 224, 220, 0.9);
  border-radius: var(--radius-md);
  background: rgba(255, 255, 255, 0.66);
  box-shadow: var(--shadow-card);
  transition: transform 0.35s cubic-bezier(0.22, 1, 0.36, 1),
    border-color 0.35s ease, box-shadow 0.35s ease;
}
.hurdle:hover {
  transform: translateY(-3px);
  border-color: rgba(var(--accent-rgb), 0.2);
  box-shadow: 0 24px 54px -36px rgba(var(--accent-rgb), 0.55);
}

.hurdle__key {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--accent-700);
  padding-bottom: 0.65rem;
  border-bottom: 1px solid var(--line-soft);
  margin: 0 0 0.8rem;
}
.hurdle p { margin: 0; font-size: 0.98rem; line-height: 1.65; }

/* ------------------------------------------------------------- § fasi --- */

.phases { margin-top: 2.4rem; counter-reset: fase; }

.phase {
  display: grid;
  grid-template-columns: 4.4rem minmax(0, 1fr);
  gap: 1.3rem;
  padding: 1.55rem 0;
  border-top: 1px solid var(--line);
}
.phase:last-child { border-bottom: 1px solid var(--line); }

.phase__n {
  counter-increment: fase;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.08em;
  color: var(--accent);
  padding-top: 0.35rem;
}
.phase__n::before { content: "fase " counter(fase); white-space: nowrap; }

.phase__title {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 1.18rem;
  color: var(--ink-900);
  margin: 0 0 0.4rem;
}
.phase p { margin: 0; max-width: 66ch; font-size: 0.99rem; }

@media (max-width: 560px) {
  .phase { grid-template-columns: 1fr; gap: 0.4rem; }
}

/* -------------------------------------------------------- § casi d'uso --- */

.use-cases {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1rem;
  margin-top: 2.4rem;
}

.use-case {
  min-height: 14.5rem;
  padding: 1.35rem 1.4rem 1.45rem;
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  background: rgba(255, 255, 255, 0.76);
  box-shadow: var(--shadow-card);
  transition: transform 0.35s cubic-bezier(0.22, 1, 0.36, 1),
    border-color 0.35s ease, box-shadow 0.35s ease;
}
.use-case:hover {
  transform: translateY(-3px);
  border-color: rgba(var(--accent-rgb), 0.22);
  box-shadow: 0 24px 54px -36px rgba(var(--accent-rgb), 0.55);
}
.use-case--featured {
  background: linear-gradient(145deg, var(--ink-900), var(--ink-800));
  border-color: rgba(37, 51, 65, 0.78);
}
.use-case__key {
  margin: 0 0 0.65rem;
  color: var(--accent-700);
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}
.use-case__title {
  margin: 0 0 0.55rem;
  color: var(--ink-900);
  font-family: var(--font-display);
  font-size: 1.12rem;
  font-weight: 600;
  line-height: 1.25;
}
.use-case p:last-child {
  margin: 0;
  color: var(--ink-700);
  font-size: 0.88rem;
  line-height: 1.62;
}
.use-case--featured .use-case__key { color: #d8adbc; }
.use-case--featured .use-case__title { color: #fff; }
.use-case--featured p:last-child { color: rgba(221, 230, 238, 0.84); }

.case-proof {
  display: grid;
  grid-template-columns: minmax(0, 12rem) minmax(0, 1fr);
  gap: 1rem 2rem;
  margin-top: 1rem;
  padding: 1.3rem 1.4rem;
  border: 1px solid rgba(var(--accent-rgb), 0.2);
  border-radius: var(--radius-md);
  background: var(--accent-050);
}
.case-proof__key {
  margin: 0;
  padding-top: 0.15rem;
  color: var(--accent-700);
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}
.case-proof__title {
  margin: 0 0 0.25rem;
  color: var(--ink-900);
  font-family: var(--font-display);
  font-size: 1.08rem;
  font-weight: 600;
}
.case-proof p:last-child { margin: 0; font-size: 0.9rem; line-height: 1.62; }

@media (max-width: 900px) {
  .use-cases { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}
@media (max-width: 620px) {
  .use-cases { grid-template-columns: 1fr; }
  .use-case { min-height: 0; }
  .case-proof { grid-template-columns: 1fr; gap: 0.35rem; }
}

/* ----------------------------------------------------------- § catena --- */

.chain {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.55rem 1.9rem; /* la colonna di gap ospita la freccia fra due anelli */
  margin: 2.2rem 0 0;
  padding: 0;
  list-style: none;
}

.chain li {
  position: relative;
  display: inline-flex;
  align-items: center;
  font-family: var(--font-mono);
  font-size: 0.74rem;
  color: var(--ink-700);
  background: var(--surface-2);
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 0.46rem 0.78rem;
}
.chain li:first-child { background: var(--accent-050); border-color: rgba(var(--accent-rgb), 0.3); color: var(--accent-700); }
.chain li:not(:last-child)::after {
  content: "→";
  position: absolute;
  left: 100%;
  top: 50%;
  width: 1.9rem;
  transform: translateY(-50%);
  text-align: center;
  color: var(--accent-600);
}

.forms {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(13.5rem, 1fr));
  gap: 1.25rem;
  margin-top: 2.4rem;
}

.form-card {
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  padding: 1.25rem 1.25rem 1.4rem;
  background: rgba(255, 255, 255, 0.76);
  box-shadow: var(--shadow-card);
  transition: transform 0.35s cubic-bezier(0.22, 1, 0.36, 1),
    border-color 0.35s ease, box-shadow 0.35s ease;
}
.form-card:hover {
  transform: translateY(-3px);
  border-color: rgba(var(--accent-rgb), 0.2);
  box-shadow: 0 24px 54px -36px rgba(var(--accent-rgb), 0.55);
}
.form-card__key {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--ink-300);
  margin: 0 0 0.5rem;
}
.form-card__title {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 1.02rem;
  color: var(--ink-900);
  margin: 0 0 0.45rem;
}
.form-card p { margin: 0; font-family: var(--font-ui); font-size: 0.87rem; line-height: 1.58; color: var(--ink-700); }

/* -------------------------------------------------- § personalizzazione --- */

.knobs { margin-top: 2.4rem; border-top: 1px solid var(--line); }

.knob {
  display: grid;
  grid-template-columns: minmax(0, 12rem) minmax(0, 1fr);
  gap: 0.35rem 2rem;
  margin-inline: -1rem;
  padding: 1.15rem 1rem;
  border-bottom: 1px solid var(--line);
  border-radius: var(--radius-sm);
  transition: background-color 0.25s ease, transform 0.25s ease;
}
.knob:hover { background: var(--accent-050); transform: translateX(3px); }

.knob__key {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.02em;
  color: var(--accent-700);
  margin: 0;
  padding-top: 0.1rem;
}
.knob__text { margin: 0; font-size: 0.99rem; line-height: 1.62; max-width: 66ch; }

@media (max-width: 700px) {
  .knob { grid-template-columns: 1fr; gap: 0.3rem; }
  .knob:hover { background: transparent; transform: none; }
}

/* ----------------------------------------------------------- § canali --- */

.channels {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(19rem, 1fr));
  gap: 1rem;
  margin-top: 2.4rem;
}
.channel {
  padding: 1.3rem 1.35rem 1.4rem;
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  background: rgba(255, 255, 255, 0.7);
  box-shadow: var(--shadow-card);
  transition: transform 0.35s cubic-bezier(0.22, 1, 0.36, 1),
    border-color 0.35s ease, box-shadow 0.35s ease;
}
.channel:hover {
  transform: translateY(-3px);
  border-color: rgba(var(--accent-rgb), 0.2);
  box-shadow: 0 24px 54px -36px rgba(var(--accent-rgb), 0.55);
}
.channel__key {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent-700);
  margin: 0 0 0.5rem;
}
.channel__title {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 1.05rem;
  color: var(--ink-900);
  margin: 0 0 0.4rem;
}
.channel p { margin: 0; font-family: var(--font-ui); font-size: 0.88rem; line-height: 1.6; color: var(--ink-700); }

/* --------------------------------------------------------- § controllo --- */

.rules {
  margin: 2.2rem 0 0;
  padding: 0.35rem 1.35rem;
  list-style: none;
  max-width: 66ch;
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  background: rgba(255, 255, 255, 0.68);
  box-shadow: var(--shadow-card);
}
.rules li {
  position: relative;
  padding: 1rem 0 1rem 2rem;
  border-bottom: 1px solid var(--line-soft);
  font-size: 0.99rem;
  line-height: 1.62;
}
.rules li::before {
  content: "§";
  position: absolute;
  left: 0;
  top: 1.02rem;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--accent-600);
}

/* ------------------------------------------------------ § smistamento --- */

.module {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 17rem);
  gap: clamp(1.5rem, 4vw, 3rem);
  align-items: start;
  margin-top: 2.2rem;
}
@media (max-width: 860px) { .module { grid-template-columns: 1fr; } }

.tree {
  margin: 0;
  padding: 1rem 1.1rem;
  background: linear-gradient(145deg, #253341, #2e4052);
  color: rgba(221, 230, 238, 0.9);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: var(--radius-md);
  font-family: var(--font-mono);
  font-size: 0.72rem;
  line-height: 1.85;
  overflow-x: auto;
  box-shadow: 0 24px 48px -34px rgba(37, 51, 65, 0.75);
}
.tree b { color: #d8adbc; font-weight: 500; }
.tree i { color: var(--ink-300); font-style: normal; }

.tree-cap {
  margin: 0.7rem 0 0;
  font-family: var(--font-mono);
  font-size: 0.68rem;
  line-height: 1.6;
  color: var(--ink-500);
}

/* ----------------------------------------------------------- § scheda --- */

.spec {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(16rem, 1fr));
  gap: 0 2.5rem;
  margin: 2.2rem 0 0;
}
.spec__row {
  display: grid;
  grid-template-columns: minmax(0, 9.5rem) minmax(0, 1fr);
  gap: 0.75rem;
  padding: 0.62rem 0;
  border-bottom: 1px solid var(--line-soft);
  font-family: var(--font-mono);
  font-size: 0.76rem;
  line-height: 1.55;
}
.spec__row dt { color: var(--ink-300); letter-spacing: 0.04em; }
.spec__row dd { margin: 0; color: var(--ink-700); }

.limits {
  margin-top: 2.6rem;
  padding: 1.4rem 1.5rem;
  background: var(--accent-050);
  border-left: 2px solid var(--accent-600);
  border-radius: 0 3px 3px 0;
  max-width: 62ch;
}
.limits h3 {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--accent-700);
  margin: 0 0 0.6rem;
}
.limits p { margin: 0; font-size: 0.96rem; line-height: 1.65; color: var(--ink-800); }

/* ----------------------------------------------------- prospettive d'uso --- */

.perspectives {
  background: linear-gradient(180deg, rgba(247, 245, 243, 0.84), var(--canvas));
}
.perspectives__head {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(18rem, 0.72fr);
  gap: 1.5rem 3rem;
  align-items: end;
}
.perspectives__intro {
  margin: 0;
  color: var(--ink-500);
  font-size: 0.95rem;
  line-height: 1.65;
}

.carousel {
  position: relative;
  margin-top: 2.4rem;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  background: var(--surface);
  box-shadow: var(--shadow-soft);
}
.carousel::before {
  content: "";
  position: absolute;
  inset: 0 auto 0 0;
  width: 4px;
  background: linear-gradient(180deg, var(--accent), rgba(var(--accent-rgb), 0.28));
}
.carousel__viewport { min-height: 18.5rem; }
.carousel__slide {
  display: none;
  min-height: 18.5rem;
  padding: clamp(2rem, 5vw, 4rem) clamp(1.8rem, 6vw, 5.5rem) 2.4rem;
  align-content: center;
}
.carousel__slide.is-active {
  display: grid;
  animation: carousel-in 0.42s cubic-bezier(0.22, 0.7, 0.24, 1);
}
@keyframes carousel-in {
  from { opacity: 0; transform: translateX(10px); }
  to { opacity: 1; transform: none; }
}
.carousel__key {
  margin: 0 0 0.8rem;
  color: var(--accent-700);
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}
.carousel__title {
  max-width: 29ch;
  margin: 0;
  color: var(--ink-900);
  font-family: var(--font-display);
  font-size: clamp(1.55rem, 3.2vw, 2.35rem);
  font-weight: 500;
  line-height: 1.16;
  text-wrap: balance;
}
.carousel__text {
  max-width: 66ch;
  margin: 1rem 0 0;
  color: var(--ink-500);
  font-size: 0.95rem;
  line-height: 1.65;
}
.carousel__controls {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.85rem 1.1rem;
  border-top: 1px solid var(--line-soft);
  background: rgba(242, 240, 237, 0.48);
}
.carousel__dots { display: flex; gap: 0.5rem; }
.carousel__dot {
  position: relative;
  width: 2rem;
  height: 2rem;
  padding: 0;
  border: 0;
  background: transparent;
  cursor: pointer;
  transition: width 0.25s ease;
}
.carousel__dot::before {
  content: "";
  position: absolute;
  inset: 50% 0 auto;
  height: 0.25rem;
  border-radius: 999px;
  background: var(--line);
  transform: translateY(-50%);
  transition: background-color 0.2s ease;
}
.carousel__dot:hover::before { background: var(--ink-300); }
.carousel__dot.is-active { width: 3rem; }
.carousel__dot.is-active::before { background: var(--accent); }
.carousel__arrows { display: flex; gap: 0.45rem; }
.carousel__arrow {
  display: inline-grid;
  width: 2.4rem;
  height: 2.4rem;
  padding: 0;
  place-items: center;
  border: 1px solid var(--line);
  border-radius: 50%;
  background: var(--surface);
  color: var(--ink-700);
  font-family: var(--font-ui);
  font-size: 1rem;
  cursor: pointer;
  transition: border-color 0.2s ease, color 0.2s ease, background-color 0.2s ease;
}
.carousel__arrow:hover {
  border-color: rgba(var(--accent-rgb), 0.42);
  background: var(--accent-050);
  color: var(--accent-700);
}

@media (max-width: 760px) {
  .perspectives__head { grid-template-columns: 1fr; }
  .carousel__viewport, .carousel__slide { min-height: 21rem; }
}

/* --------------------------------------------------------- chiusura --- */

.close {
  position: relative;
  background: linear-gradient(135deg, #253341 0%, #2e4052 64%, #3c4050 100%);
  color: #dde6ee;
  padding-block: clamp(4rem, 9vw, 7rem);
  overflow: hidden;
}
.close::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    radial-gradient(circle at 78% 18%, rgba(var(--accent-rgb), 0.28), transparent 22rem),
    repeating-linear-gradient(to bottom, rgba(255, 255, 255, 0.035) 0 1px, transparent 1px 96px);
  pointer-events: none;
}
.close__inner { position: relative; z-index: 1; max-width: 46rem; }
.close .eyebrow { color: #d8adbc; }
.close__title {
  font-family: var(--font-display);
  font-weight: 500;
  font-size: clamp(1.9rem, 4.2vw, 3rem);
  line-height: 1.1;
  letter-spacing: -0.02em;
  color: #fff;
  margin: 1rem 0 0;
  max-width: 28ch;
  text-wrap: balance;
}
.close__text {
  margin: 1.4rem 0 0;
  max-width: 66ch;
  color: rgba(221, 230, 238, 0.84);
  font-size: 1.05rem;
}

.foot {
  background: #202e3a;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  padding-block: 1.6rem;
}
.foot__inner {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem 1.5rem;
  align-items: center;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.06em;
  color: rgba(159, 179, 200, 0.7);
}
.foot__inner b { color: rgba(221, 230, 238, 0.9); font-weight: 500; }
.foot__spacer { margin-left: auto; }

/* -------------------------------------------------------------- moto --- */

.reveal {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity 0.65s ease, transform 0.65s cubic-bezier(0.22, 0.7, 0.24, 1);
}
.reveal.is-in { opacity: 1; transform: none; }

.rise { opacity: 0; transform: translateY(18px); }
.is-loaded .rise {
  animation: rise 0.75s cubic-bezier(0.22, 0.7, 0.24, 1) forwards;
  animation-delay: var(--d, 0s);
}
@keyframes rise { to { opacity: 1; transform: none; } }

.is-loaded .front__rule { animation: sweep 0.6s cubic-bezier(0.22, 0.7, 0.24, 1) 0.35s backwards; }
@keyframes sweep { from { transform: scaleX(0); } }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .reveal, .rise { opacity: 1 !important; transform: none !important; transition: none; animation: none !important; }
  .chip.is-pulse { animation: none; }
  .is-loaded .front__rule { animation: none; }
  .carousel__slide.is-active { animation: none; }
  .btn:hover, .hurdle:hover, .use-case:hover, .form-card:hover, .channel:hover, .knob:hover { transform: none; }
}