/* ============================================================
   Giovanni Passet · Elettricista
   "L'impianto" — la pagina è uno schema unifilare.
   Il montante e le derivazioni sono generati da script.js
   a partire dalla posizione reale degli elementi in pagina.
   ============================================================ */

/* ── Token ─────────────────────────────────────────────── */

:root {
  /* Superficie: bianco freddo, chroma verso il blu del marchio.
     Mai crema/sabbia: qui il riferimento è il foglio da disegno,
     non la carta invecchiata. */
  --bg:        oklch(0.982 0.003 255);
  --surface:   oklch(0.952 0.005 255);
  --hair:      oklch(0.885 0.007 255);

  --ink:       oklch(0.190 0.018 255);
  --ink-mid:   oklch(0.435 0.016 255);
  --ink-soft:  oklch(0.520 0.015 255);

  /* Il circuito: grafite quando è a riposo, blu quando è in tensione.
     Il colore qui non decora — indica la corrente. */
  --line:      oklch(0.790 0.010 255);
  --live:      oklch(0.520 0.205 262);
  --live-hot:  oklch(0.680 0.190 255);

  --wa:        oklch(0.720 0.170 152);
  --on-wa:     oklch(0.160 0.020 255);

  --rail:      clamp(2.9rem, 6vw, 5.5rem);
  --pad:       clamp(1.15rem, 4vw, 3rem);
  --spine-x:   calc(var(--pad) + var(--rail) * 0.30);

  --stroke:    1.5px;

  --ease:      cubic-bezier(0.22, 1, 0.36, 1);

  --z-line:    0;
  --z-content: 1;
  --z-bar:     40;

  color-scheme: light dark;
}

@media (prefers-color-scheme: dark) {
  :root {
    /* L'inversione non è un "tema premium": è la copia cianografica
       dello stesso disegno. */
    --bg:       oklch(0.168 0.018 255);
    --surface:  oklch(0.215 0.021 255);
    --hair:     oklch(0.292 0.021 255);

    --ink:      oklch(0.955 0.008 250);
    --ink-mid:  oklch(0.775 0.013 250);
    --ink-soft: oklch(0.680 0.015 250);

    --line:     oklch(0.375 0.024 255);
    --live:     oklch(0.735 0.155 250);
    --live-hot: oklch(0.880 0.110 245);

    --wa:       oklch(0.780 0.150 152);
  }
}

/* ── Base ──────────────────────────────────────────────── */

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

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

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: "Archivo", system-ui, -apple-system, "Segoe UI", sans-serif;
  font-variation-settings: "wdth" 100, "wght" 420;
  font-size: clamp(1rem, 0.96rem + 0.2vw, 1.075rem);
  line-height: 1.62;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
}

h1, h2, h3 { margin: 0; text-wrap: balance; }
p { margin: 0; text-wrap: pretty; }
ul, ol { margin: 0; padding: 0; list-style: none; }

a { color: inherit; }

:focus-visible {
  outline: 2px solid var(--live);
  outline-offset: 3px;
  border-radius: 1px;
}

.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  z-index: 100;
  background: var(--ink);
  color: var(--bg);
  padding: 0.75rem 1.1rem;
  font-variation-settings: "wdth" 105, "wght" 600;
}
.skip-link:focus { left: 0.5rem; top: 0.5rem; }

/* ── Sistema di annotazione ────────────────────────────────
   Le etichette tecniche sono un sistema nominato del progetto
   (annotazioni di disegno), non un eyebrow sopra ogni titolo:
   vivono sul montante e nel cartiglio, mai sopra un h2.
   L'asse di larghezza di Archivo è ciò che le distingue dal
   corpo del testo — larga e stretta sono due voci diverse. */

.rail__tag,
.cartiglio__k {
  font-variation-settings: "wdth" 118, "wght" 620;
  font-size: 0.6875rem;
  letter-spacing: 0.155em;
  text-transform: uppercase;
  color: var(--ink-soft);
  font-feature-settings: "tnum" 1;
}

/* ── Impaginato ────────────────────────────────────────── */

.doc {
  position: relative;
  max-width: 1180px;
  margin-inline: auto;
  padding-inline: var(--pad);
}

/* Il montante. Sta sotto al testo, mai sopra. */
.circuit {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  z-index: var(--z-line);
  pointer-events: none;
  overflow: visible;
}

.circuit__spine,
.circuit__branch {
  fill: none;
  stroke-linecap: round;
  stroke-linejoin: round;
  vector-effect: non-scaling-stroke;
}

.circuit__spine--base { stroke: var(--line); stroke-width: var(--stroke); }

.circuit__spine--live {
  stroke: var(--live);
  stroke-width: calc(var(--stroke) + 0.5px);
}

.circuit__branch {
  stroke: var(--line);
  stroke-width: var(--stroke);
  stroke-dasharray: var(--len);
  stroke-dashoffset: var(--len);
  transition: stroke-dashoffset 1.1s var(--ease), stroke 0.5s linear;
}
.circuit__branch.is-live { stroke-dashoffset: 0; stroke: var(--live); }

.circuit__head {
  fill: var(--live-hot);
  opacity: 0;
  transition: opacity 0.4s linear;
}
.circuit__head.is-on { opacity: 1; }

.circuit__node {
  fill: var(--bg);
  stroke: var(--line);
  stroke-width: var(--stroke);
  vector-effect: non-scaling-stroke;
  transition: stroke 0.45s linear, fill 0.45s linear;
}
.circuit__node.is-live { stroke: var(--live); fill: var(--live); }

.spine-guide {
  position: absolute;
  top: 0;
  left: var(--spine-x);
  width: 0;
  height: 100%;
  pointer-events: none;
}

/* Ogni sezione è una campata: colonna del montante + corpo. */
.bay {
  position: relative;
  z-index: var(--z-content);
  display: grid;
  grid-template-columns: var(--rail) minmax(0, 1fr);
  align-items: start;
}

.bay__body { grid-column: 2; }

.rail {
  grid-column: 1;
  grid-row: 1;
  position: relative;
  align-self: stretch;
  min-height: 7rem;
}

/* Annotazione lungo il conduttore, come su un disegno vero. */
.rail__tag {
  position: absolute;
  top: 0.5rem;
  left: calc(var(--rail) * 0.30 + 0.7rem);
  writing-mode: vertical-rl;
  transform: rotate(180deg);
  transform-origin: center;
  white-space: nowrap;
}

/* ── Testata ───────────────────────────────────────────── */

.topbar {
  position: relative;
  z-index: var(--z-content);
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 1rem;
  flex-wrap: wrap;
  padding: 1.6rem 0 2.4rem;
}

.brand { text-decoration: none; display: flex; align-items: baseline; gap: 0.7rem; flex-wrap: wrap; }
.brand__name { font-variation-settings: "wdth" 96, "wght" 700; font-size: 1.05rem; letter-spacing: -0.01em; }
.brand__role {
  font-variation-settings: "wdth" 116, "wght" 560;
  font-size: 0.66rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--ink-soft);
}

.topbar__call {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  text-decoration: none;
  font-variation-settings: "wdth" 104, "wght" 600;
  font-size: 0.94rem;
  font-feature-settings: "tnum" 1;
  color: var(--ink);
  padding: 0.45rem 0.2rem;
  border-bottom: 1.5px solid var(--line);
  transition: border-color 0.3s var(--ease), color 0.3s var(--ease);
}
.topbar__call:hover { border-color: var(--live); color: var(--live); }
.topbar__call .ic { width: 15px; height: 15px; }

.ic { width: 18px; height: 18px; fill: currentColor; flex: none; }
.wa-glyph { width: 17px; height: 17px; flex: none; }

/* ── Tipografia ────────────────────────────────────────── */

.display {
  font-variation-settings: "wdth" 88, "wght" 780;
  font-size: clamp(2.1rem, 1.1rem + 5.1vw, 4.5rem);
  line-height: 1.02;
  letter-spacing: -0.032em;
  margin-bottom: 1.5rem;
}

.heading {
  font-variation-settings: "wdth" 92, "wght" 700;
  font-size: clamp(1.65rem, 1.1rem + 2.2vw, 2.6rem);
  line-height: 1.1;
  letter-spacing: -0.024em;
  max-width: 20ch;
}

.lede {
  font-size: clamp(1.06rem, 1rem + 0.4vw, 1.24rem);
  line-height: 1.58;
  color: var(--ink-mid);
  max-width: 54ch;
}
.lede strong { color: var(--ink); font-variation-settings: "wdth" 100, "wght" 640; }

.sub {
  margin-top: 1rem;
  color: var(--ink-mid);
  max-width: 62ch;
}

.note {
  margin-top: 1.4rem;
  font-size: 0.92rem;
  color: var(--ink-mid);
}
.note a { color: var(--ink); text-decoration-color: var(--line); text-underline-offset: 3px; }
.note a:hover { color: var(--live); }

/* ── Campate ───────────────────────────────────────────── */

.bay--hero {
  isolation: isolate;
  overflow: clip;
  padding-block: clamp(1.5rem, 4vw, 3.5rem) clamp(3rem, 6vw, 5rem);
}
.bay--hero > :not(.hero__media) { position: relative; z-index: 1; }
.hero__media {
  position: absolute;
  inset: 0 calc(var(--pad) * -1);
  z-index: 0;
  overflow: hidden;
  pointer-events: none;
}
.hero__media::after {
  content: "";
  position: absolute;
  inset: 0;
  background:
    linear-gradient(90deg, var(--bg) 0 29%, color-mix(in oklab, var(--bg) 88%, transparent) 47%, transparent 72%),
    linear-gradient(0deg, var(--bg) 0%, color-mix(in oklab, var(--bg) 78%, transparent) 18%, transparent 42%);
}
.hero__poster,
.hero__video {
  position: absolute;
  inset: 0;
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
}
.hero__video {
  opacity: 0;
  transition: opacity 560ms var(--ease);
}
.hero__video.is-ready { opacity: 1; }
.bay--services { padding-block: clamp(3rem, 7vw, 6rem); }
.bay--steps,
.bay--area,
.bay--faq { padding-block: clamp(2.75rem, 5.5vw, 4.75rem); }
.bay--close { padding-block: clamp(4rem, 9vw, 8rem) clamp(4rem, 9vw, 7rem); }

/* ── Azioni ────────────────────────────────────────────── */

.actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.85rem;
  margin-top: 2.2rem;
}

/* Squadrate, non a pillola: la pillola era il tell del template. */
.act {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  padding: 0.95rem 1.5rem;
  min-height: 56px;
  border-radius: 2px;
  text-decoration: none;
  font-variation-settings: "wdth" 100, "wght" 640;
  font-size: 1rem;
  font-feature-settings: "tnum" 1;
  border: 1.5px solid var(--ink);
  transition: background-color 0.3s var(--ease),
              background-position 0.45s var(--ease),
              color 0.3s var(--ease),
              border-color 0.3s var(--ease);
}

.act--call {
  background: var(--ink);
  border-color: var(--ink);
  color: var(--bg);
}
.act--call:hover,
.act--call:focus-visible { background: var(--live); border-color: var(--live); }

/* Al passaggio del mouse la corrente entra da sinistra e riempie
   il contatto. Un gradiente spostato, non un pseudo-elemento
   sospeso in un contesto di impilamento. */
.act--wa {
  color: var(--ink);
  border-color: var(--line);
  background-image: linear-gradient(to right, var(--wa) 0 50%, transparent 50%);
  background-size: 201% 100%;
  background-position: 100% 0;
  background-repeat: no-repeat;
}
.act--wa:hover,
.act--wa:focus-visible {
  background-position: 0 0;
  color: var(--on-wa);
  border-color: var(--wa);
}
.act--wa .wa-glyph { fill: var(--wa); transition: fill 0.3s var(--ease); }
.act--wa:hover .wa-glyph,
.act--wa:focus-visible .wa-glyph { fill: var(--on-wa); }

.actions--close .act { padding-inline: 1.75rem; font-size: 1.05rem; }

/* ── Derivazioni (servizi) ─────────────────────────────── */

/* Le righe hanno un proprio montante, quindi la lista occupa
   tutta la campata invece di annidarsi nella colonna di testo. */
.circuits {
  grid-column: 1 / -1;
  position: relative;
  z-index: var(--z-content);
  margin-top: clamp(2.5rem, 5vw, 4rem);
}

.circuit-row {
  display: grid;
  grid-template-columns: var(--rail) minmax(0, 1fr) auto;
  align-items: start;
  column-gap: clamp(0.75rem, 2vw, 1.5rem);
  padding-block: clamp(1.6rem, 3vw, 2.3rem);
}

.circuit-row__id {
  grid-column: 1;
  padding-top: 0.15rem;
  font-variation-settings: "wdth" 112, "wght" 620;
  font-size: 0.78rem;
  letter-spacing: 0.06em;
  font-feature-settings: "tnum" 1;
  color: var(--ink-soft);
  transition: color 0.5s var(--ease);
}
.circuit-row.is-live .circuit-row__id { color: var(--live); }

.circuit-row__text { grid-column: 2; }

.circuit-row__text h3 {
  font-variation-settings: "wdth" 97, "wght" 660;
  font-size: clamp(1.18rem, 1rem + 0.75vw, 1.55rem);
  line-height: 1.18;
  letter-spacing: -0.016em;
}

.circuit-row__text p {
  margin-top: 0.45rem;
  color: var(--ink-mid);
  font-size: 0.98rem;
  max-width: 46ch;
}

.circuit-row__sym {
  grid-column: 3;
  display: block;
  width: clamp(2.4rem, 5vw, 3.4rem);
  aspect-ratio: 1;
  color: var(--line);
  transition: color 0.6s var(--ease);
}
.circuit-row.is-live .circuit-row__sym { color: var(--live); }

.circuit-row__sym svg {
  width: 100%;
  height: 100%;
  fill: none;
  stroke: currentColor;
  stroke-width: 1.6;
  stroke-linecap: round;
  stroke-linejoin: round;
  vector-effect: non-scaling-stroke;
}

.aside {
  margin-top: 2.5rem;
  color: var(--ink-mid);
  font-size: 0.98rem;
  max-width: 56ch;
}
.aside a { color: var(--ink); text-decoration-color: var(--live); text-decoration-thickness: 1.5px; text-underline-offset: 3px; }
.aside a:hover { color: var(--live); }

/* ── In serie (come lavoro) ────────────────────────────── */

.series {
  grid-column: 2;
  display: grid;
  gap: clamp(1.5rem, 3vw, 2rem);
  margin-top: clamp(2.2rem, 4vw, 3rem);
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
}

.series__step {
  padding-top: 1.1rem;
  border-top: 1.5px solid var(--hair);
  transition: border-color 0.6s var(--ease);
}
.series__step.is-live { border-color: var(--live); }

/* Numerazione ammessa: qui è una sequenza reale in tre tempi,
   non un'etichetta decorativa ripetuta su ogni sezione. */
.series__n {
  display: block;
  font-variation-settings: "wdth" 108, "wght" 640;
  font-size: 0.75rem;
  letter-spacing: 0.14em;
  font-feature-settings: "tnum" 1;
  color: var(--ink-soft);
  transition: color 0.6s var(--ease);
}
.series__step.is-live .series__n { color: var(--live); }

.series__step h3 {
  margin-top: 0.55rem;
  font-variation-settings: "wdth" 97, "wght" 650;
  font-size: 1.15rem;
  letter-spacing: -0.012em;
}
.series__step p { margin-top: 0.5rem; color: var(--ink-mid); font-size: 0.96rem; }

/* ── Area servita ──────────────────────────────────────── */

.comuni {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem 0.55rem;
  margin-top: 2rem;
  max-width: 46rem;
}

.comuni li {
  padding: 0.42rem 0.8rem;
  border: 1.5px solid var(--hair);
  border-radius: 2px;
  font-size: 0.88rem;
  font-variation-settings: "wdth" 102, "wght" 520;
  color: var(--ink-mid);
  transition: border-color 0.3s var(--ease), color 0.3s var(--ease);
}
.comuni li:hover { border-color: var(--live); color: var(--ink); }

/* ── Domande ───────────────────────────────────────────── */

.faq { margin-top: 2rem; max-width: 46rem; border-top: 1.5px solid var(--hair); }

.faq__item { border-bottom: 1.5px solid var(--hair); }

.faq__item summary {
  cursor: pointer;
  list-style: none;
  padding: 1.15rem 2.5rem 1.15rem 0;
  position: relative;
  font-variation-settings: "wdth" 99, "wght" 600;
  font-size: 1.03rem;
  transition: color 0.25s var(--ease);
}
.faq__item summary::-webkit-details-marker { display: none; }
.faq__item summary:hover { color: var(--live); }

/* Interruttore: aperto = contatto chiuso */
.faq__item summary::after {
  content: "";
  position: absolute;
  right: 0.35rem;
  top: 50%;
  width: 15px;
  height: 15px;
  margin-top: -7.5px;
  border-right: 1.5px solid var(--line);
  border-bottom: 1.5px solid var(--line);
  transform: rotate(45deg);
  transform-origin: 60% 60%;
  transition: transform 0.35s var(--ease), border-color 0.35s var(--ease);
}
.faq__item[open] summary::after {
  transform: rotate(225deg);
  border-color: var(--live);
}

.faq__item p {
  padding: 0 2.5rem 1.35rem 0;
  color: var(--ink-mid);
  max-width: 60ch;
}

/* ── Chiusura ──────────────────────────────────────────── */

.display--close { max-width: 12ch; }

/* ── Cartiglio ─────────────────────────────────────────── */

.cartiglio {
  position: relative;
  z-index: var(--z-content);
  margin-block: clamp(2rem, 5vw, 4rem) clamp(2rem, 5vw, 3.5rem);
}

.cartiglio__grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  border: 1.5px solid var(--hair);
  border-width: 1.5px 0 0 1.5px;
}

.cartiglio__cell {
  padding: 0.85rem 1rem 0.95rem;
  border-right: 1.5px solid var(--hair);
  border-bottom: 1.5px solid var(--hair);
  display: flex;
  flex-direction: column;
  gap: 0.3rem;
  min-width: 0;
}
.cartiglio__cell--wide { grid-column: span 2; }

.cartiglio__v {
  font-size: 0.88rem;
  font-variation-settings: "wdth" 100, "wght" 520;
  color: var(--ink);
  overflow-wrap: break-word;
}
.cartiglio__v--num { font-feature-settings: "tnum" 1; letter-spacing: 0.01em; }
.cartiglio__v a { text-decoration-color: var(--line); text-underline-offset: 3px; }
.cartiglio__v a:hover { color: var(--live); }

/* ── Barra azioni mobile ───────────────────────────────── */

.callbar {
  position: fixed;
  left: 0;
  right: 0;
  bottom: 0;
  z-index: var(--z-bar);
  display: none;
  border-top: 1.5px solid var(--hair);
  background: color-mix(in oklab, var(--bg) 92%, transparent);
  backdrop-filter: blur(10px);
  padding-bottom: env(safe-area-inset-bottom, 0);
  transform: translateY(110%);
  transition: transform 0.45s var(--ease);
}
.callbar.is-on { transform: translateY(0); }

.callbar__btn {
  flex: 1;
  min-height: 58px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  text-decoration: none;
  font-variation-settings: "wdth" 100, "wght" 640;
  font-size: 1rem;
}
.callbar__btn--call { background: var(--ink); color: var(--bg); }
.callbar__btn--wa { color: var(--ink); border-left: 1.5px solid var(--hair); }
.callbar__btn--wa .wa-glyph { fill: var(--wa); }

/* ── Responsive ────────────────────────────────────────── */

/* Su desktop non c'è la barra fissa in basso: il numero resta
   raggiungibile in testa a qualunque altezza della pagina. */
@media (min-width: 681px) {
  .topbar {
    position: sticky;
    top: 0;
    z-index: var(--z-bar);
    padding-block: 1.15rem;
    margin-inline: calc(var(--pad) * -1);
    padding-inline: var(--pad);
    background: color-mix(in oklab, var(--bg) 95%, transparent);
    backdrop-filter: blur(10px);
    border-bottom: 1.5px solid transparent;
    transition: border-color 0.3s var(--ease);
  }
  .topbar.is-stuck { border-bottom-color: var(--hair); }
}

@media (max-width: 860px) {
  .series { grid-template-columns: 1fr; }
  .display--close { max-width: none; }
}

@media (max-width: 680px) {
  :root { --rail: 2.4rem; }

  .topbar { padding-bottom: 1.6rem; }

  .rail__tag { font-size: 0.6rem; letter-spacing: 0.13em; left: calc(var(--rail) * 0.30 + 0.5rem); }

  .actions { gap: 0.7rem; }
  .act { flex: 1 1 100%; justify-content: center; }
  .bay--hero { min-height: min(760px, 100svh); padding-top: clamp(12.5rem, 28svh, 14rem); }
  .hero__media { inset-inline: calc(var(--pad) * -1); opacity: 0.82; }
  .hero__poster,
  .hero__video { object-position: 68% top; }
  .hero__media::after {
    background:
      linear-gradient(90deg, color-mix(in oklab, var(--bg) 36%, transparent) 0%, transparent 46%),
      linear-gradient(0deg, var(--bg) 0 25%, color-mix(in oklab, var(--bg) 72%, transparent) 48%, transparent 74%);
  }

  .circuit-row {
    grid-template-columns: var(--rail) minmax(0, 1fr);
    row-gap: 0.75rem;
  }
  .circuit-row__sym {
    grid-column: 2;
    grid-row: 1;
    justify-self: end;
    width: 2.1rem;
  }
  .circuit-row__text { grid-row: 2; grid-column: 2; }

  /* Il numero sta sopra la derivazione, non a cavallo. */
  .circuit-row__id { padding-top: 0; margin-top: -0.5rem; font-size: 0.72rem; }

  .cartiglio__cell--wide { grid-column: span 1; }

  .callbar { display: flex; }
  body { padding-bottom: 4.6rem; }

}

/* ── Reduced motion ────────────────────────────────────────
   Il circuito arriva già completamente in tensione.
   Nessun contenuto dipende dal movimento. */

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

  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }

  .circuit__branch { stroke-dashoffset: 0; stroke: var(--live); }
  .circuit__head { display: none; }
  .circuit__node { stroke: var(--live); fill: var(--live); }
  .hero__video { display: none; }
}

/* Se il JS non gira, il montante non viene disegnato:
   la pagina resta un documento completo e leggibile. */