/* Richiede css/variables.css, collegato prima di questo file in ogni pagina */

/* ==========================================================================
   Base
   ========================================================================== */

*, *::before, *::after { box-sizing: border-box; }
[hidden] { display: none !important; }

html {
  -webkit-text-size-adjust: 100%;
  text-size-adjust: 100%;
  scroll-padding-top: 6rem;
}

@media (prefers-reduced-motion: no-preference) {
  html { scroll-behavior: smooth; }
}

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--font-body);
  font-size: var(--step-0);
  line-height: var(--leading-body);
  font-variation-settings: "wdth" var(--wdth-body);
  font-kerning: normal;
  text-rendering: optimizeLegibility;
}

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

h1, h2, h3, h4 {
  margin: 0;
  font-family: var(--font-display);
  font-variation-settings: "wdth" var(--wdth-display);
  font-weight: 650;
  line-height: var(--leading-snug);
  letter-spacing: -0.005em;
  text-wrap: balance;
}

h1 { font-size: var(--step-5); line-height: var(--leading-tight); letter-spacing: -0.02em; }
h2 { font-size: var(--step-4); line-height: 1.08; letter-spacing: -0.015em; }
h3 { font-size: var(--step-2); line-height: 1.15; }
h4 { font-size: var(--step-1); }

p, ul, ol, dl, table, figure, blockquote { margin: 0; }
p + p { margin-top: var(--space-4); }

a {
  color: var(--forest);
  text-decoration-thickness: 1px;
  text-underline-offset: 0.2em;
}
a:hover { color: var(--ink); text-decoration-thickness: 2px; }

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

strong { font-weight: 650; }

abbr[title] { text-decoration: none; }

/* Dati tecnici: letture, unità, sigle normative */
.data, code, kbd {
  font-family: var(--font-mono);
  font-size: 0.92em;
  font-variant-numeric: tabular-nums;
  letter-spacing: 0;
}

.visually-hidden {
  position: absolute !important;
  width: 1px; height: 1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
}

.wrap {
  width: 100%;
  max-width: var(--wrap);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.skip-link {
  position: absolute;
  left: var(--space-4);
  top: -4rem;
  z-index: 100;
  padding: var(--space-2) var(--space-4);
  background: var(--heat);
  color: var(--ink);
  font-weight: 600;
}
.skip-link:focus { top: var(--space-2); }

/* ==========================================================================
   Bottoni
   ========================================================================== */

.btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  min-height: 48px;
  padding: 0.7rem 1.25rem;
  border: 2px solid transparent;
  border-radius: var(--radius-control);
  font: inherit;
  font-weight: 600;
  line-height: 1.2;
  text-decoration: none;
  cursor: pointer;
  transition: background-color .15s, color .15s, border-color .15s;
}

/* Arancione pieno con testo inchiostro: 5.1:1 */
.btn--primary { background: var(--heat); color: var(--ink); }
.btn--primary:hover { background: var(--ink); color: var(--paper); }

.btn--secondary { border-color: var(--forest); color: var(--forest); background: transparent; }
.btn--secondary:hover { background: var(--forest); color: var(--paper); }

.btn--on-dark { border-color: var(--sage); color: var(--paper); background: transparent; }
.btn--on-dark:hover { background: var(--sage); color: var(--ink); }

.actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
}

/* ==========================================================================
   Header: utility bar + masthead + menu
   ========================================================================== */

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: var(--paper);
}

.utility-bar {
  background: var(--forest-deep);
  color: var(--sage);
  font-size: var(--step--1);
}
.utility-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: var(--space-4);
  min-height: 38px;
}
.utility-inner p { margin: 0; }
.utility-portal {
  color: var(--paper);
  font-weight: 600;
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding-block: var(--space-2);
}
.utility-portal::before {
  content: "";
  width: 8px; height: 8px;
  border-radius: 50%;
  background: var(--heat);
}
.utility-portal:hover { color: var(--sage); text-decoration: underline; }

.masthead { border-bottom: 1px solid var(--rule); }
.masthead-inner {
  display: flex;
  align-items: center;
  gap: var(--space-6);
  min-height: 72px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  color: var(--ink);
  text-decoration: none;
  flex-shrink: 0;
}
.brand svg { width: 30px; height: 34px; }
.brand-name {
  font-family: var(--font-display);
  font-variation-settings: "wdth" 75;
  font-weight: 700;
  font-size: 1.75rem;
  letter-spacing: -0.02em;
  line-height: 1;
}
.brand:hover { color: var(--forest); }

.nav { margin-left: auto; }
.nav-list, .nav-sub { list-style: none; padding: 0; margin: 0; }

.nav-list { display: flex; align-items: center; gap: var(--space-1); }

.nav-item { position: relative; }

.nav-link {
  display: flex;
  align-items: center;
  gap: 0.35rem;
  min-height: 72px;
  padding-inline: 0.6rem;
  color: var(--ink);
  font-weight: 550;
  font-size: 0.97rem;
  text-decoration: none;
  border-bottom: 3px solid transparent;
  border-top: 3px solid transparent;
}
.has-panel > .nav-link::after {
  content: "";
  width: 6px; height: 6px;
  border-right: 1.5px solid currentColor;
  border-bottom: 1.5px solid currentColor;
  transform: translateY(-2px) rotate(45deg);
  opacity: .6;
}
.nav-link:hover,
.nav-item:focus-within > .nav-link { color: var(--forest); }
.nav-link[aria-current="page"] { border-bottom-color: var(--heat); }

.nav-item--cta .nav-link {
  min-height: auto;
  margin-left: var(--space-3);
  padding: 0.55rem 1rem;
  border: 2px solid var(--forest);
  border-radius: var(--radius-control);
  color: var(--forest);
}
.nav-item--cta .nav-link:hover { background: var(--forest); color: var(--paper); }
.nav-item--cta .nav-link[aria-current="page"] { background: var(--forest); color: var(--paper); }

.nav-panel {
  display: none;
  position: absolute;
  top: 100%;
  left: -0.5rem;
  min-width: 300px;
  padding: var(--space-4) var(--space-4) var(--space-3);
  background: var(--paper);
  border: 1px solid var(--rule);
  border-top: 3px solid var(--forest);
  box-shadow: 0 18px 30px -18px rgba(27, 40, 25, .35);
}
.nav-panel--wide { min-width: 560px; display: none; }
.nav-item--end .nav-panel { left: auto; right: -0.5rem; }

.nav-panel-intro {
  margin-bottom: var(--space-3);
  padding-bottom: var(--space-3);
  border-bottom: 1px solid var(--rule);
  color: var(--ink-soft);
  font-size: var(--step--1);
  line-height: 1.45;
  max-width: 44ch;
}

.nav-sub a {
  display: block;
  padding: 0.45rem 0.5rem;
  margin-inline: -0.5rem;
  color: var(--ink);
  text-decoration: none;
  border-radius: var(--radius-control);
}
.nav-sub a:hover { background: var(--mist); }
.nav-sub-title { display: block; font-weight: 600; }
.nav-sub-desc { display: block; color: var(--ink-soft); font-size: var(--step--1); line-height: 1.4; }

.nav-panel--wide .nav-sub {
  display: grid;
  grid-template-columns: 1fr 1fr;
  column-gap: var(--space-5);
}

.nav-toggle {
  display: none;
  margin-left: auto;
  align-items: center;
  gap: var(--space-2);
  min-height: 44px;
  padding: 0 var(--space-3);
  border: 2px solid var(--forest);
  border-radius: var(--radius-control);
  background: none;
  color: var(--forest);
  font: inherit;
  font-weight: 600;
  cursor: pointer;
}
.nav-toggle-bars {
  width: 18px; height: 12px;
  border-block: 2px solid currentColor;
  position: relative;
}
.nav-toggle-bars::after {
  content: "";
  position: absolute; left: 0; right: 0; top: 3px;
  border-top: 2px solid currentColor;
}

@media (min-width: 1081px) {
  .nav-item:hover > .nav-panel,
  .nav-item:focus-within > .nav-panel { display: block; }
}

@media (max-width: 1080px) {
  .nav-toggle { display: inline-flex; }
  .nav {
    display: none;
    position: absolute;
    top: 100%;
    left: 0; right: 0;
    max-height: calc(100vh - 110px);
    overflow-y: auto;
    background: var(--paper);
    border-bottom: 3px solid var(--forest);
    padding: var(--space-2) var(--gutter) var(--space-6);
  }
  .nav.is-open { display: block; }
  .masthead { position: relative; }
  .masthead-inner { min-height: 64px; }
  .nav-list { flex-direction: column; align-items: stretch; gap: 0; }
  .nav-item { border-bottom: 1px solid var(--rule); }
  .nav-link { min-height: 52px; padding-inline: 0; border: 0; font-size: var(--step-1); font-weight: 600; }
  .nav-link[aria-current="page"] { color: var(--forest); }
  .has-panel > .nav-link::after { display: none; }
  .nav-panel, .nav-panel--wide {
    display: block;
    position: static;
    min-width: 0;
    padding: 0 0 var(--space-3);
    border: 0;
    box-shadow: none;
  }
  .nav-panel-intro { display: none; }
  .nav-panel--wide .nav-sub, .nav-sub { display: flex; flex-wrap: wrap; gap: var(--space-1) var(--space-2); }
  .nav-sub a { margin: 0; padding: 0.35rem 0.6rem; background: var(--mist); }
  .nav-sub-desc { display: none; }
  .nav-sub-title { font-weight: 500; font-size: var(--step--1); }
  .nav-item--cta { border: 0; padding-top: var(--space-4); }
  .nav-item--cta .nav-link { margin: 0; justify-content: center; min-height: 48px; }
}

@media (max-width: 640px) {
  .utility-inner p { display: none; }
  .utility-inner { justify-content: flex-start; }
}

/* ==========================================================================
   Sezioni generiche
   ========================================================================== */

.section { padding-block: var(--space-8); }
.section--mist { background: var(--mist); }
.section--tight { padding-block: var(--space-7); }

.section-head {
  display: grid;
  gap: var(--space-4);
  max-width: 60rem;
  margin-bottom: var(--space-7);
}
.section-head p {
  max-width: var(--measure);
  color: var(--ink-soft);
  font-size: var(--step-1);
  line-height: 1.5;
}

.lead {
  font-size: var(--step-1);
  line-height: 1.5;
  max-width: 60ch;
}

.prose { max-width: var(--measure); }
.prose > * + * { margin-top: var(--space-4); }
.prose h3 { margin-top: var(--space-6); }
.prose ul, .prose ol { padding-left: 1.2em; }
.prose li + li { margin-top: var(--space-2); }
.prose li::marker { color: var(--forest); }

/* ==========================================================================
   Home — hero con schema d'edificio
   ========================================================================== */

.hero {
  padding-block: var(--space-7) var(--space-7);
  background:
    linear-gradient(var(--paper), var(--paper)) padding-box;
  border-bottom: 1px solid var(--rule);
}
.hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 5fr) minmax(0, 6fr);
  gap: var(--space-7);
  align-items: start;
}
.hero-copy { display: grid; gap: var(--space-5); align-content: start; padding-top: var(--space-6); }
.hero h1 {
  font-size: clamp(2.5rem, 1.5rem + 3.4vw, 4.25rem);
  font-variation-settings: "wdth" 75;
  font-weight: 650;
  max-width: 13ch;
}
.hero .lead { color: var(--ink-soft); max-width: 46ch; }

@media (max-width: 960px) {
  .hero-grid { grid-template-columns: 1fr; gap: var(--space-6); }
  .hero h1 { max-width: 14ch; }
}

/* --- Schema d'edificio (partials/schema-edificio.html) ------------------ */

.schema {
  display: grid;
  gap: var(--space-3);
}

.schema-switch {
  display: inline-grid;
  grid-auto-flow: column;
  grid-auto-columns: 1fr;
  justify-self: start;
  padding: 3px;
  border: 1px solid var(--rule-strong);
  border-radius: var(--radius-control);
  background: var(--paper);
}
.schema-switch legend { padding: 0; margin-bottom: var(--space-2); font-weight: 600; font-size: var(--step--1); }
.schema-switch button {
  min-height: 40px;
  padding: 0.4rem 0.9rem;
  border: 0;
  border-radius: 2px;
  background: none;
  color: var(--ink-soft);
  font: inherit;
  font-size: var(--step--1);
  font-weight: 600;
  cursor: pointer;
}
.schema-switch button[aria-pressed="true"] { background: var(--forest); color: var(--paper); }
.schema-switch button:hover:not([aria-pressed="true"]) { color: var(--forest); background: var(--mist); }

.schema-question { font-weight: 600; font-size: var(--step--1); color: var(--ink-soft); }

.schema-frame {
  position: relative;
  background: var(--mist);
  border: 1px solid var(--rule);
  /* reticolo millimetrato leggero, da tavola tecnica */
  background-image:
    linear-gradient(to right, rgba(65, 104, 58, .07) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(65, 104, 58, .07) 1px, transparent 1px);
  background-size: 20px 20px;
}
.schema-frame svg { width: 100%; height: auto; }

.schema-caption {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: var(--space-1) var(--space-4);
  font-size: var(--step--1);
  line-height: 1.5;
  color: var(--ink-soft);
}
.schema-caption strong { color: var(--ink); }
.schema-caption [data-for] { grid-column: 1 / -1; }
.schema-caption a { font-weight: 600; }
.schema[data-switch="false"] .schema-caption a { display: none; }
.doc-section > .schema { margin-block: var(--space-4); }

.schema-legend {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2) var(--space-5);
  list-style: none;
  padding: 0;
  font-size: var(--step--2);
  color: var(--ink-soft);
}
.schema-legend li { display: inline-flex; align-items: center; gap: var(--space-2); }
.schema-legend i { display: inline-block; width: 22px; height: 0; border-top: 3px solid; }
.schema-legend .lg-mandata { border-color: var(--heat); }
.schema-legend .lg-ritorno { border-color: var(--forest); }
.schema-legend .lg-dev { width: 12px; height: 12px; border: 1.5px solid var(--ink); background: var(--paper); }

/* Elementi SVG */
.sch-shell { fill: var(--paper); stroke: var(--ink); stroke-width: 2; }
.sch-slab { stroke: var(--ink); stroke-width: 2; }
.sch-wall { stroke: var(--rule-strong); stroke-width: 1.5; }
.sch-common { fill: url(#hatch); }
.sch-ground { stroke: var(--ink); stroke-width: 1.5; }
.sch-soil { fill: url(#soil); }
.sch-gap { fill: none; stroke: var(--paper); stroke-width: 9; }
.sch-pipe { fill: none; stroke-width: 3; stroke-linecap: square; stroke-linejoin: miter; }
.sch-mandata { stroke: var(--heat); }
.sch-ritorno { stroke: var(--forest); }
.sch-rad { fill: var(--paper); stroke: var(--ink); stroke-width: 1.5; transition: fill .6s var(--ease-out); }
.sch-fin { stroke: var(--ink); stroke-width: 1; }
.sch-dev { fill: var(--paper); stroke: var(--ink); stroke-width: 1.5; }
.sch-dev-screen { fill: var(--sage); }
.sch-boiler { fill: var(--paper); stroke: var(--ink); stroke-width: 1.5; }
.sch-flame { fill: var(--heat); }
.sch-label { font-family: var(--font-body); font-size: 12px; font-weight: 600; fill: var(--ink); }
.sch-sub { font-family: var(--font-body); font-size: 11px; fill: var(--ink-soft); }
.sch-read { font-family: var(--font-mono); font-size: 11.5px; font-weight: 500; fill: var(--ink); }
.sch-read-bg { fill: var(--paper); stroke: var(--rule-strong); stroke-width: 1; }
.sch-leader { stroke: var(--ink-soft); stroke-width: 1; stroke-dasharray: 2 2; fill: none; }
.sch-wave { fill: none; stroke: var(--forest); stroke-width: 1.5; stroke-linecap: round; }

.is-warm .sch-rad { fill: var(--heat-wash); }

.sch-mode { transition: opacity .35s var(--ease-out); }
.schema[data-mode="verticale"] .sch-mode--orizzontale,
.schema[data-mode="orizzontale"] .sch-mode--verticale { opacity: 0; visibility: hidden; }

/* Unico momento animato: la mandata sale dalla centrale termica */
@media (prefers-reduced-motion: no-preference) {
  .schema.is-animating .sch-flow {
    stroke-dasharray: 1;
    stroke-dashoffset: 1;
    animation: sch-flow 1.4s var(--ease-out) forwards;
  }
  .schema.is-animating .sch-flow--late { animation-delay: .5s; }
  .schema.is-animating .sch-unit .sch-read-group { opacity: 0; animation: sch-in .4s var(--ease-out) forwards; }
  .schema.is-animating .sch-unit:nth-of-type(1) .sch-read-group { animation-delay: 1.5s; }
  .schema.is-animating .sch-unit:nth-of-type(2) .sch-read-group { animation-delay: 1.25s; }
  .schema.is-animating .sch-unit:nth-of-type(3) .sch-read-group { animation-delay: 1s; }
}
@keyframes sch-flow { to { stroke-dashoffset: 0; } }
@keyframes sch-in { to { opacity: 1; } }

/* ==========================================================================
   Display stile contatore (.meter)
   ========================================================================== */

.meter {
  display: inline-grid;
  grid-auto-flow: column;
  align-items: baseline;
  gap: 0.5rem;
  padding: 0.35rem 0.75rem 0.3rem;
  border: 2px solid var(--ink);
  border-radius: var(--radius-display);
  background: var(--sage);
  box-shadow: inset 0 2px 0 rgba(27, 40, 25, .12);
  color: var(--ink);
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums slashed-zero;
  line-height: 1;
}
.meter-value { font-size: 2.25rem; font-weight: 500; letter-spacing: 0.02em; }
.meter-unit { font-size: var(--step--1); font-weight: 500; }

/* ==========================================================================
   Striscia scadenza 2027
   ========================================================================== */

.deadline { background: var(--forest-deep); color: var(--paper); }
.deadline-inner {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  gap: var(--space-4) var(--space-6);
  align-items: center;
  padding-block: var(--space-5);
}
.deadline p { max-width: 62ch; color: var(--mist); }
.deadline strong { color: var(--paper); }
.deadline .meter { background: var(--sage); border-color: var(--sage); color: var(--ink); }
.deadline .data { display: block; margin-top: var(--space-1); color: var(--sage); font-size: var(--step--2); }
.deadline a { color: var(--paper); font-weight: 600; white-space: nowrap; }
.deadline a:hover { color: var(--sage); }

@media (max-width: 760px) {
  .deadline-inner { grid-template-columns: 1fr; justify-items: start; }
}

/* ==========================================================================
   Barra di ripartizione volontario / involontario
   ========================================================================== */

.split-bar { display: grid; gap: var(--space-4); }
.split-bar-track {
  display: grid;
  grid-template-columns: 50fr 12fr 38fr;
  height: 64px;
  border: 2px solid var(--ink);
}
.split-bar-seg { position: relative; display: flex; align-items: center; padding-inline: var(--space-3); font-family: var(--font-mono); font-size: var(--step--1); }
.split-bar-seg--vol { background: var(--heat); color: var(--ink); }
.split-bar-seg--flex {
  background: repeating-linear-gradient(135deg, var(--heat) 0 6px, var(--heat-wash) 6px 12px);
}
.split-bar-seg--inv { background: var(--sage); color: var(--ink); border-left: 2px solid var(--ink); }
.split-bar-mark {
  position: absolute;
  top: -10px; bottom: -10px; left: 50%;
  border-left: 2px dashed var(--ink);
}
.split-bar-scale {
  display: flex;
  justify-content: space-between;
  font-family: var(--font-mono);
  font-size: var(--step--2);
  color: var(--ink-soft);
  position: relative;
}
.split-bar-scale span:nth-child(2) { position: absolute; left: 50%; transform: translateX(-50%); }

.split-bar-keys {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-5) var(--space-7);
  margin-top: var(--space-4);
}
.split-bar-key { padding-left: var(--space-4); border-left: 6px solid var(--heat); }
.split-bar-key--inv { border-left-color: var(--sage); }
.split-bar-key h3 { font-size: var(--step-1); margin-bottom: var(--space-2); }
.split-bar-key p { color: var(--ink-soft); }

@media (max-width: 700px) {
  .split-bar-keys { grid-template-columns: 1fr; }
  .split-bar-seg { font-size: var(--step--2); padding-inline: var(--space-2); }
}

/* ==========================================================================
   Tabella di confronto e tabelle dati
   ========================================================================== */

.table-scroll { overflow-x: auto; -webkit-overflow-scrolling: touch; }

.compare {
  width: 100%;
  min-width: 640px;
  border-collapse: collapse;
  font-size: var(--step-0);
}
.compare caption { text-align: left; }
.compare th, .compare td {
  padding: var(--space-4) var(--space-4) var(--space-4) 0;
  text-align: left;
  vertical-align: top;
  border-bottom: 1px solid var(--rule);
}
.compare thead th {
  padding-top: 0;
  border-bottom: 2px solid var(--ink);
  font-family: var(--font-display);
  font-variation-settings: "wdth" var(--wdth-display);
  font-size: var(--step-2);
  font-weight: 650;
  line-height: 1.1;
}
.compare thead th a { color: inherit; text-decoration: none; }
.compare thead th a:hover { color: var(--forest); text-decoration: underline; }
.compare thead th span { display: block; margin-top: var(--space-1); font-family: var(--font-body); font-variation-settings: "wdth" 100; font-size: var(--step--1); font-weight: 400; color: var(--ink-soft); }
.compare tbody th {
  width: 22%;
  font-weight: 600;
  color: var(--ink-soft);
  font-size: var(--step--1);
  padding-top: calc(var(--space-4) + 0.15em);
}
.compare td { width: 39%; }

@media (max-width: 700px) {
  .compare { min-width: 0; }
  .compare thead { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); }
  .compare tr, .compare th, .compare td { display: block; width: auto; }
  .compare tbody tr { padding-block: var(--space-4); border-bottom: 1px solid var(--rule); }
  .compare tbody tr:first-child { border-top: 2px solid var(--ink); }
  .compare tbody th, .compare td { padding: 0; border: 0; }
  .compare tbody th { width: auto; margin-bottom: var(--space-2); color: var(--ink); font-size: var(--step-0); }
  .compare td { position: relative; padding-left: 6rem; font-size: var(--step--1); }
  .compare td + td { margin-top: var(--space-2); }
  .compare td::before { content: attr(data-label); position: absolute; left: 0; top: 0; font-weight: 600; color: var(--forest); }
}

.data-table {
  width: 100%;
  border-collapse: collapse;
  font-size: var(--step--1);
}
.data-table th, .data-table td {
  padding: var(--space-3) var(--space-4) var(--space-3) 0;
  border-bottom: 1px solid var(--rule);
  text-align: left;
  vertical-align: top;
}
.data-table thead th { border-bottom: 2px solid var(--ink); font-weight: 600; }
.data-table td:first-child { white-space: nowrap; }

/* ==========================================================================
   Indice dei pilastri (home, prodotti)
   ========================================================================== */

.pillars-list { list-style: none; padding: 0; border-top: 2px solid var(--ink); }
.pillar {
  display: grid;
  grid-template-columns: minmax(0, 4fr) minmax(0, 5fr) minmax(0, 4fr);
  gap: var(--space-3) var(--space-6);
  padding-block: var(--space-6);
  border-bottom: 1px solid var(--rule);
}
.pillar h3 { font-size: var(--step-3); }
.pillar h3 a { color: var(--ink); text-decoration: none; }
.pillar h3 a:hover { color: var(--forest); text-decoration: underline; text-decoration-thickness: 2px; }
.pillar p { color: var(--ink-soft); }
.pillar-links { list-style: none; padding: 0; display: flex; flex-wrap: wrap; gap: var(--space-2); align-content: start; }
.pillar-links a {
  display: inline-block;
  padding: 0.3rem 0.65rem;
  border: 1px solid var(--rule-strong);
  border-radius: var(--radius-control);
  font-size: var(--step--1);
  text-decoration: none;
  color: var(--ink);
}
.pillar-links a:hover { border-color: var(--forest); background: var(--mist); color: var(--forest); }

@media (max-width: 860px) {
  .pillar { grid-template-columns: 1fr; }
}

/* ==========================================================================
   Fascia portale Smart Metering
   ========================================================================== */

.portal-band { background: var(--forest); color: var(--paper); }
.portal-grid {
  display: grid;
  grid-template-columns: minmax(0, 6fr) minmax(0, 5fr);
  gap: var(--space-6);
  align-items: center;
  padding-block: var(--space-8);
}
.portal-band h2 { color: var(--paper); max-width: 16ch; }
.portal-band p { color: var(--mist); max-width: 52ch; margin-top: var(--space-4); }
.portal-readout {
  display: grid;
  gap: var(--space-3);
  justify-items: start;
  padding: var(--space-5);
  border: 1px solid rgba(203, 222, 184, .45);
}
.portal-readout dl { display: grid; grid-template-columns: auto auto; gap: var(--space-2) var(--space-5); font-size: var(--step--1); }
.portal-readout dt { color: var(--sage); }
.portal-readout dd { margin: 0; font-family: var(--font-mono); color: var(--paper); text-align: right; }
.portal-readout small { color: var(--sage); font-size: var(--step--2); }

@media (max-width: 860px) {
  .portal-grid { grid-template-columns: 1fr; }
}

/* ==========================================================================
   Pagine interne: intestazione + layout documento
   ========================================================================== */

.page-head {
  padding-block: var(--space-7) var(--space-7);
  background: var(--mist);
  border-bottom: 1px solid var(--rule);
}
.page-head-inner { display: grid; gap: var(--space-4); }
.page-head h1 { max-width: 18ch; font-variation-settings: "wdth" 75; }
.page-head .lead { color: var(--ink-soft); }

.breadcrumb ol {
  display: flex;
  flex-wrap: wrap;
  list-style: none;
  padding: 0;
  font-size: var(--step--1);
  color: var(--ink-soft);
}
.breadcrumb li + li::before { content: "/"; margin-inline: 0.5em; color: var(--rule-strong); }
.breadcrumb a { color: var(--ink-soft); }
.breadcrumb a:hover { color: var(--forest); }

.doc {
  display: grid;
  grid-template-columns: 13rem minmax(0, 1fr);
  gap: var(--space-7);
  padding-block: var(--space-7) var(--space-9);
}

.doc-toc { position: relative; }
.doc-toc nav { position: sticky; top: 8rem; }
.doc-toc h2 {
  font-family: var(--font-body);
  font-variation-settings: "wdth" 100;
  font-size: var(--step--1);
  font-weight: 600;
  color: var(--ink-soft);
  margin-bottom: var(--space-3);
}
.doc-toc ol, .doc-toc ul { list-style: none; padding: 0; border-left: 2px solid var(--rule); }
.doc-toc li ol, .doc-toc li ul { border-left: 0; padding-left: var(--space-4); }
.doc-toc a {
  display: block;
  padding: 0.3rem 0 0.3rem var(--space-4);
  margin-left: -2px;
  border-left: 2px solid transparent;
  color: var(--ink-soft);
  font-size: var(--step--1);
  line-height: 1.35;
  text-decoration: none;
}
.doc-toc a:hover { color: var(--forest); border-left-color: var(--rule-strong); }
.doc-toc a.is-current { color: var(--ink); font-weight: 600; border-left-color: var(--heat); }

.doc-body { min-width: 0; }

/* Una sezione del documento: testo + colonna margine per le norme */
.doc-section {
  display: grid;
  grid-template-columns: minmax(0, var(--measure)) minmax(11rem, 15rem);
  grid-auto-flow: row dense;
  column-gap: var(--space-6);
  align-items: start;
  padding-bottom: var(--space-7);
}
.doc-section + .doc-section { padding-top: var(--space-7); border-top: 1px solid var(--rule); }
.doc-section > * { grid-column: 1; }
.doc-section > .note { grid-column: 2; }
.doc-section > .wide { grid-column: 1 / -1; }
.doc-section > * + * { margin-top: var(--space-4); }
.doc-section > h2 + *, .doc-section > h3 + * { margin-top: var(--space-4); }
.doc-section > h3 { margin-top: var(--space-6); }
.doc-section > .note { margin-top: 0; }
.doc-section ul, .doc-section ol { padding-left: 1.2em; }
.doc-section li + li { margin-top: var(--space-2); }
.doc-section li::marker { color: var(--forest); }

/* Capitoli principali (#indiretta, #diretta) */
.doc-chapter { padding-top: var(--space-8); }
.doc-chapter-head {
  display: grid;
  gap: var(--space-3);
  padding-block: var(--space-5);
  margin-bottom: var(--space-6);
  border-top: 6px solid var(--forest);
}
.doc-chapter-head h2 { font-size: var(--step-5); font-variation-settings: "wdth" 75; }
.doc-chapter-head p { max-width: var(--measure); font-size: var(--step-1); color: var(--ink-soft); line-height: 1.5; }
.doc-chapter-kind { font-family: var(--font-mono); font-size: var(--step--1); color: var(--forest); }

/* Nota a margine: riferimenti normativi, rimandi */
.doc-section > .note { grid-row: span 3; }
.note {
  padding: var(--space-2) 0 var(--space-2) var(--space-4);
  border-left: 3px solid var(--sage);
  font-size: var(--step--1);
  line-height: 1.45;
  color: var(--ink-soft);
}
.note strong, .note .data { display: block; color: var(--ink); font-weight: 600; }
.note .data { font-size: var(--step--1); }
.note p + p { margin-top: var(--space-2); }
.note p + strong, .note p + .data { margin-top: var(--space-4); }
.note + .note { margin-top: var(--space-4); }

@media (max-width: 1180px) {
  .doc-section { grid-template-columns: minmax(0, 1fr); }
  .doc-section > .note { grid-column: 1; grid-row: auto; margin-top: var(--space-4); max-width: var(--measure); background: var(--mist); padding: var(--space-3) var(--space-4); }
}
@media (max-width: 900px) {
  .doc { grid-template-columns: 1fr; gap: var(--space-5); padding-top: var(--space-5); }
  .doc-toc nav { position: static; }
  .doc-toc ol, .doc-toc ul { display: flex; flex-wrap: wrap; gap: var(--space-2); border: 0; }
  .doc-toc li ol, .doc-toc li ul { display: none; }
  .doc-toc a { margin: 0; padding: 0.3rem 0.65rem; border: 1px solid var(--rule-strong); border-radius: var(--radius-control); }
  .doc-toc a.is-current { border-color: var(--heat); }
}

/* ==========================================================================
   Formule e definizioni
   ========================================================================== */

.formula {
  display: grid;
  gap: var(--space-4);
  padding: var(--space-5);
  background: var(--mist);
  border-left: 4px solid var(--forest);
}
.formula-expr {
  font-family: var(--font-mono);
  font-size: clamp(1.15rem, 1rem + 1vw, 1.6rem);
  line-height: 1.4;
  overflow-x: auto;
  white-space: nowrap;
}
.formula-expr sub { font-size: 0.6em; }
.formula dl {
  display: grid;
  grid-template-columns: max-content 1fr;
  gap: var(--space-2) var(--space-4);
  font-size: var(--step--1);
}
.formula dt { font-family: var(--font-mono); font-weight: 500; }
.formula dd { margin: 0; color: var(--ink-soft); }

/* ==========================================================================
   Split: due opzioni affiancate (in chiaro / scala fissa, compatto / remoto)
   ========================================================================== */

.split-card {
  display: grid;
  grid-template-columns: 1fr 1fr;
  border-top: 2px solid var(--ink);
}
.split-card > div { padding: var(--space-4) var(--space-5) var(--space-4) 0; }
.split-card > div + div { padding-left: var(--space-5); border-left: 1px solid var(--rule); }
.split-card h3, .split-card h4 { font-size: var(--step-1); margin-bottom: var(--space-2); }
.split-card p { color: var(--ink-soft); font-size: var(--step-0); }
.split-card .tag { display: inline-block; margin-bottom: var(--space-2); }

@media (max-width: 640px) {
  .split-card { grid-template-columns: 1fr; }
  .split-card > div + div { padding-left: 0; border-left: 0; border-top: 1px solid var(--rule); }
}

.tag {
  font-family: var(--font-mono);
  font-size: var(--step--2);
  color: var(--forest);
}

/* ==========================================================================
   Figure (schemi tecnici)
   ========================================================================== */

.figure { display: grid; gap: var(--space-3); }
.figure-frame {
  background: var(--mist);
  border: 1px solid var(--rule);
  padding: var(--space-4);
  background-image:
    linear-gradient(to right, rgba(65, 104, 58, .07) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(65, 104, 58, .07) 1px, transparent 1px);
  background-size: 20px 20px;
}
.figure-frame svg { width: 100%; height: auto; margin-inline: auto; }
.figure figcaption { font-size: var(--step--1); color: var(--ink-soft); max-width: var(--measure); }
.figure figcaption strong { color: var(--ink); }

.dim { stroke: var(--ink-soft); stroke-width: 1; fill: none; }
.dim-text { font-family: var(--font-mono); font-size: 12px; fill: var(--ink); }
.dim-accent { stroke: var(--heat); stroke-width: 1.5; fill: none; }

/* ==========================================================================
   Segnaposto: contenuti non ancora forniti dal cliente
   ========================================================================== */

.ph {
  display: grid;
  gap: var(--space-2);
  align-content: center;
  padding: var(--space-5);
  border: 2px dashed var(--rule-strong);
  background:
    repeating-linear-gradient(-45deg, transparent 0 10px, rgba(65, 104, 58, .06) 10px 20px),
    var(--paper);
  color: var(--ink-soft);
  font-size: var(--step--1);
}
.ph strong { color: var(--ink); font-size: var(--step-0); }
.ph--img { aspect-ratio: 4 / 3; justify-items: center; text-align: center; }
.ph--img::before {
  content: "";
  width: 44px; height: 34px;
  border: 2px solid var(--rule-strong);
  border-radius: 2px;
  background:
    radial-gradient(circle at 30% 35%, var(--rule-strong) 0 4px, transparent 5px),
    linear-gradient(135deg, transparent 55%, var(--rule-strong) 55% 60%, transparent 60%);
}

/* ==========================================================================
   Prodotti
   ========================================================================== */

.product-index { list-style: none; padding: 0; border-top: 2px solid var(--ink); }
.product-row {
  display: grid;
  grid-template-columns: minmax(0, 3fr) minmax(0, 5fr) minmax(0, 3fr);
  gap: var(--space-6);
  padding-block: var(--space-6);
  border-bottom: 1px solid var(--rule);
  align-items: start;
}
.product-row h2 { font-size: var(--step-3); }
.product-row h2 a { color: var(--ink); text-decoration: none; }
.product-row h2 a:hover { color: var(--forest); text-decoration: underline; text-decoration-thickness: 2px; }
.product-row .prose { color: var(--ink-soft); }
.product-models { list-style: none; padding: 0; display: flex; flex-wrap: wrap; gap: var(--space-2); margin-top: var(--space-4); }
.product-models li {
  font-family: var(--font-mono);
  font-size: var(--step--2);
  padding: 0.2rem 0.5rem;
  background: var(--mist);
  border: 1px solid var(--rule);
}
.product-row .ph--img { aspect-ratio: 4 / 3; }

@media (max-width: 900px) {
  .product-row { grid-template-columns: 1fr; }
  .product-row .ph--img { max-width: 360px; }
}

.product-intro {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(220px, 320px);
  gap: var(--space-6);
  align-items: start;
}
@media (max-width: 800px) {
  .product-intro { grid-template-columns: 1fr; }
  .product-intro .ph--img { max-width: 320px; }
}

.benefits { list-style: none; padding: 0 !important; border-top: 1px solid var(--rule); }
.benefits li {
  display: grid;
  grid-template-columns: 1.25rem 1fr;
  gap: var(--space-3);
  padding-block: var(--space-3);
  border-bottom: 1px solid var(--rule);
  margin: 0 !important;
}
.benefits li::before {
  content: "";
  width: 10px; height: 10px;
  margin-top: 0.5em;
  background: var(--heat);
}
.benefits em { font-style: normal; color: var(--ink-soft); }

/* ==========================================================================
   Download
   ========================================================================== */

.files { list-style: none; padding: 0 !important; border-top: 2px solid var(--ink); }
.files li { margin: 0 !important; border-bottom: 1px solid var(--rule); }
.file {
  display: grid;
  grid-template-columns: 2.25rem minmax(0, 1fr) auto;
  gap: var(--space-3);
  align-items: center;
  padding-block: var(--space-3);
  color: var(--ink);
  text-decoration: none;
}
.file:hover { background: var(--mist); color: var(--ink); }
.file-icon {
  width: 2.25rem; height: 2.6rem;
  position: relative;
  border: 1.5px solid var(--ink);
  background: var(--paper);
  clip-path: polygon(0 0, 70% 0, 100% 22%, 100% 100%, 0 100%);
  display: grid;
  place-items: end center;
  padding-bottom: 3px;
  font-family: var(--font-mono);
  font-size: 9px;
  font-weight: 600;
}
.file-icon::after {
  content: "";
  position: absolute; top: -1px; right: -1px;
  width: 30%; height: 22%;
  background: var(--sage);
  border-left: 1.5px solid var(--ink);
  border-bottom: 1.5px solid var(--ink);
}
.file-name { font-weight: 600; }
.file-meta { display: block; font-size: var(--step--1); color: var(--ink-soft); font-weight: 400; }
.file-state {
  font-family: var(--font-mono);
  font-size: var(--step--2);
  color: var(--ink-soft);
  padding: 0.15rem 0.45rem;
  border: 1px dashed var(--rule-strong);
  white-space: nowrap;
}
.files-group + .files-group { margin-top: var(--space-6); }
.files-group h3 { font-size: var(--step-1); margin-bottom: var(--space-3); }

@media (max-width: 520px) {
  .file { grid-template-columns: 2.25rem minmax(0, 1fr); }
  .file-state { grid-column: 2; justify-self: start; }
}

/* ==========================================================================
   FAQ / consigli
   ========================================================================== */

.advice {
  padding: var(--space-5);
  border-left: 4px solid var(--heat);
  background: var(--mist);
}
.advice h3 { font-size: var(--step-1); margin-bottom: var(--space-2); }

/* ==========================================================================
   Form contatti
   ========================================================================== */

.form { display: grid; gap: var(--space-5); max-width: 44rem; }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: var(--space-5); }
@media (max-width: 640px) { .form-row { grid-template-columns: 1fr; } }

.field { display: grid; gap: var(--space-2); }
.field label, .field legend { font-weight: 600; font-size: var(--step--1); }
.field .hint { font-size: var(--step--1); color: var(--ink-soft); }
.field input[type="text"],
.field input[type="email"],
.field input[type="tel"],
.field select,
.field textarea {
  width: 100%;
  min-height: 48px;
  padding: 0.65rem 0.8rem;
  border: 1.5px solid var(--rule-strong);
  border-radius: var(--radius-control);
  background: var(--paper);
  color: var(--ink);
  font: inherit;
}
.field textarea { min-height: 9rem; resize: vertical; }
.field input:hover, .field select:hover, .field textarea:hover { border-color: var(--forest); }
.field input:focus-visible, .field select:focus-visible, .field textarea:focus-visible { outline-offset: 0; border-color: var(--ink); }

.profile-options { border: 0; padding: 0; margin: 0; }
.profile-options legend { margin-bottom: var(--space-2); }
.profile-options div { display: flex; flex-wrap: wrap; gap: var(--space-2); }
.profile-options label {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  min-height: 44px;
  padding: 0 0.9rem;
  border: 1.5px solid var(--rule-strong);
  border-radius: var(--radius-control);
  font-weight: 500;
  cursor: pointer;
}
.profile-options input { accent-color: var(--forest); }
.profile-options label:has(input:checked) { border-color: var(--forest); background: var(--mist); }
.profile-options label:has(input:focus-visible) { outline: 3px solid var(--focus); outline-offset: 2px; }

.check { display: grid; grid-template-columns: auto 1fr; gap: var(--space-3); align-items: start; font-size: var(--step--1); }
.check input { width: 20px; height: 20px; margin-top: 2px; accent-color: var(--forest); }

.form-status { font-size: var(--step--1); }
.form-status[data-state="error"] { color: var(--heat-text); font-weight: 600; }
.form-status[data-state="ok"] { color: var(--forest); font-weight: 600; }

.contact-grid {
  display: grid;
  grid-template-columns: minmax(0, 7fr) minmax(0, 4fr);
  gap: var(--space-8);
  padding-block: var(--space-7) var(--space-9);
}
@media (max-width: 900px) { .contact-grid { grid-template-columns: 1fr; gap: var(--space-7); } }

.address { font-style: normal; display: grid; gap: var(--space-4); align-content: start; }
.address dl { display: grid; gap: var(--space-1); font-size: var(--step--1); }
.address dt { color: var(--ink-soft); }
.address dd { margin: 0 0 var(--space-2); }

/* ==========================================================================
   Footer
   ========================================================================== */

.site-footer {
  background: var(--forest-deep);
  color: var(--mist);
  font-size: var(--step--1);
}
.footer-grid {
  display: grid;
  grid-template-columns: minmax(0, 4fr) repeat(3, minmax(0, 2fr));
  gap: var(--space-6);
  padding-block: var(--space-8) var(--space-7);
}
.site-footer h2 {
  font-family: var(--font-body);
  font-variation-settings: "wdth" 100;
  font-size: var(--step--1);
  font-weight: 600;
  color: var(--sage);
  margin-bottom: var(--space-3);
}
.site-footer ul { list-style: none; padding: 0; display: grid; gap: var(--space-2); }
.site-footer a { color: var(--paper); text-decoration: none; }
.site-footer a:hover { text-decoration: underline; color: var(--sage); }
.footer-brand .brand { color: var(--paper); }
.footer-brand .brand:hover { color: var(--sage); }
.footer-brand address { font-style: normal; margin-top: var(--space-4); line-height: 1.6; }
.footer-legal {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: var(--space-3);
  padding-block: var(--space-4);
  border-top: 1px solid rgba(203, 222, 184, .25);
  color: var(--sage);
  font-size: var(--step--2);
}
.footer-legal .data { font-size: inherit; }

@media (max-width: 860px) {
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .footer-brand { grid-column: 1 / -1; }
}

/* ==========================================================================
   Movimento ridotto
   ========================================================================== */

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}

/* Titoli di colonna e varianti segnaposto */
.aside-title { font-size: var(--step-2); }
.form-title { font-size: var(--step-3); margin-bottom: var(--space-5); }
.address address { font-style: normal; }
.ph--banner { margin-top: var(--space-5); aspect-ratio: 16 / 7; }