/* ==========================================================================
   AstraCursus — base: reset, accessibilità, tipografia e componenti condivisi
   ========================================================================== */

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

html { -webkit-text-size-adjust: 100%; overflow-x: clip; }

body {
  margin: 0;
  font-family: var(--font-body);
  font-size: var(--fs-body);
  line-height: var(--lh-body);
  color: var(--ink);
  background: var(--surface);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: clip;
}

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

h1, h2, h3, h4 {
  font-family: var(--font-head);
  font-weight: 700;
  line-height: 1.12;
  letter-spacing: -0.015em;
  margin: 0 0 var(--s-4);
  text-wrap: balance;
}
h1 { font-size: var(--fs-h1); font-weight: 800; letter-spacing: -0.03em; }
h2 { font-size: var(--fs-h2); }
h3 { font-size: var(--fs-h3); font-weight: 600; }
p { margin: 0 0 var(--s-4); max-width: var(--measure); }
p:last-child { margin-bottom: 0; }
ul, ol { margin: 0; padding: 0; }
li { list-style: none; }

a { color: inherit; text-decoration: none; }
a:hover { text-decoration: none; }

button { font: inherit; color: inherit; }

/* --- accessibilità: focus sempre visibile (WCAG 2.2 AA) --- */
:focus-visible {
  outline: var(--focus-ring) solid var(--focus);
  outline-offset: 3px;
  border-radius: 2px;
}
[data-variant="cosmico"] :focus-visible { outline-color: #7fe3d6; }

.skip-link {
  position: absolute;
  left: var(--s-4);
  top: -60px;
  z-index: 200;
  background: var(--brand-midnight);
  color: #fff;
  padding: var(--s-3) var(--s-4);
  border-radius: var(--radius-btn);
  font-weight: 600;
  transition: top 0.15s ease;
}
.skip-link:focus { top: var(--s-4); }

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

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

.section { padding-block: clamp(48px, 6vw, 112px); }
.section--tight { padding-block: clamp(40px, 4.5vw, 72px); }

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: var(--s-2);
  font-family: var(--font-head);
  font-size: var(--fs-label);
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--ink-muted);
  margin: 0 0 var(--s-4);
}
.eyebrow::before {
  content: "";
  width: 22px;
  height: 2px;
  background: var(--accent-2);
  display: inline-block;
}
[data-variant="cosmico"] .eyebrow::before { background: var(--accent); }

.lead {
  font-size: clamp(1.0625rem, 1rem + 0.35vw, 1.25rem);
  color: var(--ink-muted);
  max-width: 52ch;
}

.muted { color: var(--ink-muted); }
.small { font-size: 0.9375rem; }

.rule { border: 0; border-top: 1px solid var(--line); margin: 0; }

/* ==========================================================================
   Bottoni
   ========================================================================== */
.btn {
  --_bg: var(--btn-bg);
  --_fg: var(--btn-fg);
  display: inline-flex;
  align-items: center;
  gap: var(--s-2);
  min-height: 48px;
  padding: 12px 22px;
  background: var(--_bg);
  color: var(--_fg);
  border: 1px solid transparent;
  border-radius: var(--radius-btn);
  font-family: var(--font-head);
  font-weight: 700;
  font-size: 1rem;
  line-height: 1.2;
  cursor: pointer;
  text-align: center;
  transition: transform 0.16s ease, background-color 0.16s ease, box-shadow 0.16s ease, border-color 0.16s ease;
}
.btn:hover { transform: translateY(-1px); box-shadow: 0 6px 18px rgba(20, 46, 58, 0.16); }
.btn:active { transform: translateY(0); }
.btn .btn__arrow { transition: transform 0.16s ease; }
.btn:hover .btn__arrow { transform: translateX(3px); }

.btn--ghost {
  --_bg: transparent;
  --_fg: var(--ink);
  border-color: var(--line-strong);
}

.btn--dark { --_bg: var(--btn-dark-bg); --_fg: var(--btn-dark-fg); }

.btn--quiet {
  --_bg: transparent;
  --_fg: var(--ink);
  border-color: transparent;
  padding-inline: 4px;
  min-height: 44px;
  text-decoration: underline;
  text-underline-offset: 4px;
  text-decoration-thickness: 2px;
  text-decoration-color: var(--accent);
}
.btn--quiet:hover { transform: none; box-shadow: none; }

.btn--sm { min-height: 40px; padding: 8px 16px; font-size: 0.9375rem; }

.link-arrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-head);
  font-weight: 700;
  color: var(--ink);
  border-bottom: 2px solid var(--accent);
  padding-bottom: 2px;
  min-height: 32px;
}
.link-arrow svg { transition: transform 0.16s ease; }
.link-arrow:hover svg { transform: translateX(4px); }

/* ==========================================================================
   Header / navigazione
   ========================================================================== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 60;
  background: color-mix(in srgb, var(--surface) 92%, transparent);
  backdrop-filter: saturate(1.2) blur(10px);
  border-bottom: 1px solid var(--line);
}
@supports not (backdrop-filter: blur(1px)) {
  .site-header { background: var(--surface); }
}

.site-header__inner {
  display: flex;
  align-items: center;
  gap: var(--s-6);
  min-height: 72px;
  padding-block: var(--s-2);
}

.brand { display: flex; align-items: center; gap: 12px; flex: 0 0 auto; }
.brand__mark { width: 40px; height: 40px; flex: 0 0 auto; }
.brand__type { display: flex; flex-direction: column; line-height: 1; }
.brand__name {
  font-family: var(--font-head);
  font-weight: 800;
  font-size: 1.25rem;
  letter-spacing: -0.02em;
  color: var(--ink);
}
.brand__tag {
  font-size: 0.6875rem;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--ink-muted);
  margin-top: 3px;
}

.nav { margin-inline-start: auto; }
.nav__list { display: flex; align-items: center; gap: var(--s-6); }
.nav__link {
  font-family: var(--font-head);
  font-weight: 600;
  font-size: 0.9375rem;
  color: var(--ink-muted);
  padding: 10px 2px;
  border-bottom: 2px solid transparent;
  transition: color 0.15s ease, border-color 0.15s ease;
}
.nav__link:hover { color: var(--ink); }
.nav__link[aria-current="true"] { color: var(--ink); border-color: var(--accent); }

.header-cta { flex: 0 0 auto; }

.nav-toggle {
  display: none;
  margin-inline-start: auto;
  width: 48px;
  height: 48px;
  background: transparent;
  border: 1px solid var(--line-strong);
  border-radius: var(--radius-btn);
  cursor: pointer;
  align-items: center;
  justify-content: center;
}
.nav-toggle__bars { position: relative; width: 20px; height: 2px; background: var(--ink); }
.nav-toggle__bars::before,
.nav-toggle__bars::after {
  content: "";
  position: absolute;
  left: 0;
  width: 20px;
  height: 2px;
  background: var(--ink);
  transition: transform 0.2s ease, top 0.2s ease;
}
.nav-toggle__bars::before { top: -6px; }
.nav-toggle__bars::after { top: 6px; }
[aria-expanded="true"] .nav-toggle__bars { background: transparent; }
[aria-expanded="true"] .nav-toggle__bars::before { top: 0; transform: rotate(45deg); }
[aria-expanded="true"] .nav-toggle__bars::after { top: 0; transform: rotate(-45deg); }

/* ==========================================================================
   Switch di confronto varianti (persistente, accessibile)
   ========================================================================== */
.compare {
  position: sticky;
  top: 0;
  z-index: 70;
  background: var(--brand-midnight);
  color: #fff;
  border-bottom: 1px solid rgba(255, 255, 255, 0.14);
}
.compare__inner {
  display: flex;
  align-items: center;
  gap: var(--s-4) var(--s-6);
  flex-wrap: wrap;
  padding-block: 10px;
}
.compare__label {
  font-family: var(--font-head);
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: #b8ccd0;
  flex: 0 0 auto;
}
.compare__hint {
  margin: 0 0 0 auto;
  font-size: 0.8125rem;
  color: #b8ccd0;
  display: inline-flex;
  align-items: center;
  gap: 8px;
}
.compare__dot {
  width: 8px; height: 8px; border-radius: 50%;
  background: var(--brand-amber);
  box-shadow: 0 0 0 3px rgba(233, 180, 122, 0.22);
}
.compare__group {
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
  padding: 4px;
  background: rgba(255, 255, 255, 0.07);
  border-radius: 10px;
}
.compare__tab {
  appearance: none;
  border: 1px solid transparent;
  background: transparent;
  color: #d7e3e5;
  font-family: var(--font-head);
  font-weight: 600;
  font-size: 0.875rem;
  padding: 8px 14px;
  border-radius: 7px;
  cursor: pointer;
  white-space: nowrap;
  min-height: 40px;
  transition: background-color 0.15s ease, color 0.15s ease;
}
.compare__tab:hover { background: rgba(255, 255, 255, 0.1); color: #fff; }
.compare__tab[aria-selected="true"] {
  background: var(--brand-aurora);
  color: var(--brand-midnight);
}
.compare__tab[aria-selected="true"] .compare__tab-key { color: #0b2b32; }
.compare__tab-key {
  font-size: 0.6875rem;
  letter-spacing: 0.1em;
  color: #8fb1b6;
  margin-inline-end: 6px;
}

/* ==========================================================================
   Schede, metriche, elenchi chiave/valore
   ========================================================================== */
.plate {
  background: var(--surface-2);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}
.plate__pad { padding: clamp(20px, 2.4vw, 32px); }

.tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-family: var(--font-head);
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  padding: 5px 10px;
  border-radius: 999px;
  border: 1px solid var(--line-strong);
  color: var(--ink-muted);
}

.metric { display: flex; flex-direction: column; gap: 2px; }
.metric__value {
  font-family: var(--font-head);
  font-weight: 800;
  font-size: clamp(2rem, 1.5rem + 1.8vw, 3rem);
  line-height: 1;
  letter-spacing: -0.03em;
}
.metric__label { font-size: 0.9375rem; color: var(--ink-muted); }
.metric__source { font-size: 0.8125rem; color: var(--ink-muted); }

.kv { display: grid; gap: 2px; }
.kv__row {
  display: grid;
  grid-template-columns: minmax(120px, 34%) 1fr;
  gap: var(--s-3);
  padding: 10px 0;
  border-top: 1px solid var(--line);
  align-items: baseline;
}
.kv__row:first-child { border-top: 0; }
.kv__key {
  font-family: var(--font-head);
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--ink-muted);
}
.kv__val { margin: 0; }

/* barra dati sobria per le metriche (mai solo colore) */
.bar {
  height: 8px;
  border-radius: 999px;
  background: color-mix(in srgb, var(--ink) 10%, transparent);
  overflow: hidden;
}
.bar__fill {
  display: block;
  height: 100%;
  background: var(--accent);
  border-radius: inherit;
}
[data-variant="architetturale"] .bar__fill { background: var(--brand-midnight); }

/* ==========================================================================
   FAQ / accordion
   ========================================================================== */
.faq__item { border-top: 1px solid var(--line); }
.faq__item:last-child { border-bottom: 1px solid var(--line); }
.faq__btn {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--s-4);
  padding: var(--s-4) 0;
  background: none;
  border: 0;
  text-align: left;
  cursor: pointer;
  font-family: var(--font-head);
  font-weight: 700;
  font-size: 1.0625rem;
  min-height: 56px;
}
.faq__icon { flex: 0 0 auto; position: relative; width: 16px; height: 16px; }
.faq__icon::before,
.faq__icon::after {
  content: "";
  position: absolute;
  background: var(--accent);
  transition: transform 0.2s ease, opacity 0.2s ease;
}
.faq__icon::before { top: 7px; left: 0; width: 16px; height: 2px; }
.faq__icon::after { left: 7px; top: 0; width: 2px; height: 16px; }
[data-variant="architetturale"] .faq__icon::before,
[data-variant="architetturale"] .faq__icon::after { background: var(--brand-midnight); }
.faq__btn[aria-expanded="true"] .faq__icon::after { transform: scaleY(0); opacity: 0; }
.faq__panel { padding-bottom: var(--s-6); }
.faq__panel[hidden] { display: none; }
.faq__panel p { color: var(--ink-muted); }

/* ==========================================================================
   Form (demo locale, nessun invio)
   ========================================================================== */
.field { display: grid; gap: 6px; margin-bottom: var(--s-4); }
.field__label {
  font-family: var(--font-head);
  font-weight: 600;
  font-size: 0.9375rem;
}
.field__hint { font-size: 0.8125rem; color: var(--ink-muted); }
.field input,
.field select,
.field textarea {
  width: 100%;
  min-height: 48px;
  padding: 12px 14px;
  font: inherit;
  color: var(--ink);
  background: var(--surface-2);
  border: 1px solid var(--line-strong);
  border-radius: var(--radius-btn);
}
[data-variant="cosmico"] .field input,
[data-variant="cosmico"] .field select,
[data-variant="cosmico"] .field textarea { background: #0a1a21; color: var(--ink); }
.field textarea { min-height: 120px; resize: vertical; }
.field input:focus-visible,
.field select:focus-visible,
.field textarea:focus-visible { outline-offset: 1px; }
.field__error {
  color: #b3261e;
  font-size: 0.875rem;
  font-weight: 600;
  display: none;
}
[data-variant="cosmico"] .field__error { color: #ffb4ab; }
.field[data-invalid="true"] .field__error { display: block; }
.field[data-invalid="true"] input,
.field[data-invalid="true"] select,
.field[data-invalid="true"] textarea { border-color: #b3261e; }
[data-variant="cosmico"] .field[data-invalid="true"] input,
[data-variant="cosmico"] .field[data-invalid="true"] select,
[data-variant="cosmico"] .field[data-invalid="true"] textarea { border-color: #ffb4ab; }

.checkbox { display: flex; gap: 10px; align-items: flex-start; }
.checkbox input { width: 24px; height: 24px; min-height: 0; flex: 0 0 auto; margin-top: 2px; }

/* stato demo dichiarato apertamente */
.demo-note {
  display: flex;
  gap: 12px;
  align-items: flex-start;
  padding: 14px 16px;
  border: 1px dashed var(--line-strong);
  border-radius: var(--radius-btn);
  background: color-mix(in srgb, var(--accent-2) 12%, transparent);
  font-size: 0.9375rem;
}
[data-variant="cosmico"] .demo-note { background: rgba(233, 180, 122, 0.1); }
.demo-note strong { font-family: var(--font-head); }
.demo-note__badge {
  flex: 0 0 auto;
  font-family: var(--font-head);
  font-size: 0.6875rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  padding: 4px 8px;
  border-radius: 6px;
  background: var(--brand-midnight);
  color: #fff;
  white-space: nowrap;
}

.progress-steps { display: flex; gap: 6px; flex-wrap: wrap; margin-bottom: var(--s-6); }
.progress-steps__item {
  font-family: var(--font-head);
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--ink-muted);
  padding: 6px 10px;
  border-radius: 999px;
  border: 1px solid var(--line);
}
.progress-steps__item[aria-current="step"] {
  color: var(--ink);
  border-color: var(--accent);
  background: color-mix(in srgb, var(--accent) 14%, transparent);
}

.form-status {
  margin-top: var(--s-4);
  padding: 14px 16px;
  border-radius: var(--radius-btn);
  border: 1px solid var(--line-strong);
  font-size: 0.9375rem;
  display: none;
}
.form-status[data-state="shown"] { display: block; }
.form-status[data-tone="info"] { background: color-mix(in srgb, var(--accent) 14%, transparent); }

.payload {
  margin-top: var(--s-3);
  font-family: ui-monospace, "Cascadia Code", Consolas, monospace;
  font-size: 0.8125rem;
  white-space: pre-wrap;
  word-break: break-word;
  background: color-mix(in srgb, var(--ink) 8%, transparent);
  border-radius: var(--radius-btn);
  padding: 12px;
  max-height: 220px;
  overflow: auto;
}

/* ==========================================================================
   Footer
   ========================================================================== */
.site-footer {
  border-top: 1px solid var(--line);
  padding-block: var(--s-12);
  background: var(--surface);
}
.site-footer__grid {
  display: grid;
  gap: var(--s-8);
  grid-template-columns: 1.4fr 1fr 1fr;
}
.site-footer a { color: var(--ink-muted); }
.site-footer a:hover { color: var(--ink); text-decoration: underline; text-underline-offset: 3px; }
.footer-list { display: grid; gap: 8px; }
.footer-col__title {
  font-family: var(--font-head);
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--ink-muted);
  margin-bottom: var(--s-3);
}
.footer-legal {
  margin-top: var(--s-8);
  padding-top: var(--s-6);
  border-top: 1px solid var(--line);
  font-size: 0.8125rem;
  color: var(--ink-muted);
  display: grid;
  gap: 6px;
}

/* ==========================================================================
   Reveal on scroll (progressive enhancement, disattivata in reduced-motion)
   ========================================================================== */
.reveal { opacity: 0; transform: translateY(16px); transition: opacity 0.5s ease, transform 0.5s ease; }
.reveal.is-in { opacity: 1; transform: none; }
.no-js .reveal { opacity: 1; transform: none; }

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
    scroll-behavior: auto !important;
  }
  .reveal { opacity: 1 !important; transform: none !important; }
}

/* ==========================================================================
   Responsive: navigazione mobile
   ========================================================================== */
@media (max-width: 940px) {
  .nav { margin-inline-start: auto; }
  .nav-toggle { display: inline-flex; }
  .header-cta { display: none; }
  .nav {
    position: fixed;
    inset: 0 0 0 auto;
    width: min(88vw, 380px);
    background: var(--surface);
    border-left: 1px solid var(--line);
    padding: calc(var(--s-16) + 8px) var(--s-6) var(--s-6);
    transform: translateX(102%);
    transition: transform 0.26s ease;
    overflow-y: auto;
    box-shadow: -20px 0 60px rgba(20, 46, 58, 0.22);
  }
  .nav[data-open="true"] { transform: none; }
  .nav__list { flex-direction: column; align-items: stretch; gap: 0; }
  .nav__link {
    padding: 16px 0;
    border-bottom: 1px solid var(--line);
    border-left: 0;
    font-size: 1.125rem;
  }
  .nav__link[aria-current="true"] { border-bottom-color: var(--line); color: var(--ink); }
  .nav__cta { margin-top: var(--s-6); }
  .nav__cta .btn { width: 100%; justify-content: center; }
  .nav-scrim {
    position: fixed;
    inset: 0;
    background: rgba(10, 24, 30, 0.5);
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.26s ease;
    z-index: 55;
  }
  .nav-scrim[data-open="true"] { opacity: 1; pointer-events: auto; }
}

@media (min-width: 941px) {
  .nav-scrim, .nav__cta { display: none; }
}

@media (max-width: 760px) {
  :root { --gutter: 20px; }
  .site-footer__grid { grid-template-columns: 1fr; gap: var(--s-6); }
  .compare__hint { margin-inline-start: 0; width: 100%; }
  .compare__inner { padding-block: 8px; }
}
@media (max-width: 420px) {
  :root { --gutter: 16px; }
  .brand__tag { display: none; }
}