/* ==========================================================================
   AstraCursus — componenti trasversali e aggiustamenti di struttura
   (caricato dopo base.css e prima dei layout di variante)
   ========================================================================== */

/* La barra di confronto e l'header formano un unico blocco sticky, così non
   si sovrappongono e l'altezza dello sticky è una sola da misurare. */
.topbar { position: sticky; top: 0; z-index: 90; }
.compare { position: relative; z-index: 2; }
.site-header { position: relative; z-index: 1; }

/* ancore: evita che lo sticky copra il titolo di sezione */
[data-section] { scroll-margin-top: var(--anchor-offset, 150px); }
#main { display: block; }

/* etichetta della variante attiva, utile per il confronto immediato */
.concept-badge {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-head);
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  padding: 6px 14px;
  border: 1px solid var(--line-strong);
  border-radius: 999px;
  color: var(--ink-muted);
  margin: 0 0 var(--s-6);
}
.concept-badge > span:first-child {
  display: inline-grid;
  place-items: center;
  width: 22px;
  height: 22px;
  border-radius: 50%;
  background: var(--accent);
  color: var(--brand-midnight);
  font-size: 0.6875rem;
}
[data-variant="architetturale"] .concept-badge > span:first-child { background: var(--brand-amber); }

/* --- player Lottie --- */
.lottie-stage { position: relative; display: block; width: 100%; }
.lottie-stage__mount { display: block; width: 100%; height: 100%; }
.lottie-stage__mount svg { display: block; width: 100%; height: 100%; }
[data-lottie-fallback="true"] .lottie-stage__mount { display: grid; place-items: center; }

/* --- modulo --- */
.form { max-width: 640px; }
.form-actions { display: flex; flex-wrap: wrap; gap: var(--s-3); margin-top: var(--s-6); }
.step__title { margin: 0 0 var(--s-6); }
.form-status:focus-visible { outline: var(--focus-ring) solid var(--focus); outline-offset: 2px; }

/* --- FAQ: l'h3 racchiude solo il bottone --- */
.faq__heading { margin: 0; font-size: inherit; }

/* --- variante C: nodi su superfici chiare ---
   La variante architetturale riusa la classe .constellation__node del tema
   cosmico; qui la si riporta su carta chiara e si disattiva il bagliore. */
[data-variant="architetturale"] .constellation__node {
  background: var(--surface-2);
  border-color: var(--line-strong);
}
[data-variant="architetturale"] .constellation__node::before { display: none; }
[data-variant="architetturale"] .constellation__id { color: var(--ink-muted); }
[data-variant="architetturale"] .constellation__node h3 { color: var(--ink); }
[data-variant="architetturale"] .constellation__node p { color: var(--ink-muted); }
[data-variant="architetturale"] .constellation__cta .btn--ghost { border-color: var(--line-strong); }

/* ==========================================================================
   REVISIONE SCURA "tre notti" — sezioni condivise dalle tre varianti.
   Caricato dopo base.css; le differenze vere fra Osservatorio, Costellazione
   e Aurora vivono nei rispettivi layout-*.css (composizione, non sola tinta).
   ========================================================================== */

/* --- fix condiviso di visibilità: l'attributo [hidden] deve vincere sempre.
   Filtro percorsi, pannelli variante e step del modulo usano [hidden] con
   classi che impostano `display`, che altrimenti lo annullerebbero. --- */
[hidden] { display: none !important; }

h1, h2, h3, h4 { color: var(--ink); }

/* --- testata di sezione --- */
.sec-head { max-width: 64ch; margin-bottom: var(--s-12); }
.sec-head .lead { margin-bottom: 0; }

/* --- errori di campo su fondo scuro (base.css usava un rosso da fondo chiaro) --- */
.field__error { color: var(--danger); }
.field[data-invalid="true"] input,
.field[data-invalid="true"] select,
.field[data-invalid="true"] textarea { border-color: var(--danger); }

/* ==========================================================================
   Hero — base condivisa; ogni variante ne cambia la composizione
   ========================================================================== */
.hero {
  position: relative;
  overflow: hidden;
  padding-block: var(--hero-pad);
  border-bottom: 1px solid var(--line);
}
.hero > .wrap { position: relative; z-index: 2; }
.hero__grid {
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
  gap: clamp(32px, 5vw, 72px);
  align-items: center;
}
.hero__copy { position: relative; z-index: 2; }
.hero h1 { margin-bottom: var(--s-6); }
.hero .lead { max-width: 50ch; }
.hero__actions { display: flex; gap: var(--s-3); flex-wrap: wrap; margin-top: var(--s-8); }
.hero__actions--center { justify-content: center; }
.hero__tags { display: flex; gap: 8px; flex-wrap: wrap; margin-top: var(--s-8); }
.hero__stage { margin: 0; position: relative; }
.hero__copy--center { max-width: 62ch; margin-inline: auto; text-align: center; }
.hero__copy--center .lead { margin-inline: auto; }
.hero__copy--center .concept-badge { margin-inline: auto; }
.hero__copy--center .hero__tags { justify-content: center; }

/* stage HUD da osservatorio (riusato come "strumentazione" del tema 1) */
.stage-hud {
  position: relative;
  border: 1px solid var(--line-strong);
  border-radius: var(--radius);
  padding: clamp(14px, 2vw, 22px);
  background: rgba(8, 22, 28, 0.5);
  backdrop-filter: blur(4px);
  box-shadow: var(--shadow);
}
.stage-hud .lottie-stage__mount { aspect-ratio: 1 / 1; }
.stage-hud figcaption {
  margin-top: var(--s-3);
  padding-top: var(--s-3);
  border-top: 1px solid var(--line);
  display: flex;
  justify-content: space-between;
  gap: var(--s-3);
  font-size: 0.8125rem;
  color: var(--ink-muted);
  font-variant-numeric: tabular-nums;
}
.hud-corner {
  position: absolute;
  top: 12px;
  font-family: ui-monospace, Consolas, monospace;
  font-size: 0.6875rem;
  letter-spacing: 0.08em;
  color: var(--ink-muted);
  text-transform: uppercase;
}
.hud-corner--tl { left: 14px; }
.hud-corner--tr { right: 14px; }

/* I montaggi Lottie hanno sempre un'area minima: la forma resta visibile
   anche se il player non è ancora partito o è in reduced-motion. */
.lottie-stage__mount { min-height: 240px; }
.hero__stage--aurora .lottie-stage__mount { aspect-ratio: 4 / 3; }
.flow__stage .lottie-stage__mount { aspect-ratio: 16 / 9; }
.flow--hero .flow__stage .lottie-stage__mount { aspect-ratio: 16 / 7; }

/* ==========================================================================
   Orientamento — nodi e legami (stessa marcatura nelle tre varianti)
   ========================================================================== */
.constellation { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: var(--s-6); }
.constellation__node {
  position: relative;
  padding: var(--s-8);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.06), rgba(255, 255, 255, 0.02));
  overflow: hidden;
  display: flex;
  flex-direction: column;
}
.constellation__node::before {
  content: "";
  position: absolute;
  top: -40px;
  right: -40px;
  width: 140px;
  height: 140px;
  border-radius: 50%;
  background: radial-gradient(circle, var(--glow-a), transparent 70%);
}
.constellation__id {
  font-family: ui-monospace, Consolas, monospace;
  font-size: 0.75rem;
  letter-spacing: 0.14em;
  color: var(--ink-muted);
  text-transform: uppercase;
}
.constellation__node h3 { margin: var(--s-4) 0 var(--s-3); }
.constellation__node p { color: var(--ink-muted); font-size: 0.9375rem; }
.constellation__cta { margin-top: auto; padding-top: var(--s-6); display: inline-flex; }

/* ==========================================================================
   Percorsi — filtro, catalogo e schede
   ========================================================================== */
.filter-bar { display: flex; gap: 8px; flex-wrap: wrap; margin-bottom: var(--s-8); }
.filter-chip {
  appearance: none;
  cursor: pointer;
  font-family: var(--font-head);
  font-weight: 700;
  font-size: 0.8125rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  padding: 9px 16px;
  border-radius: 999px;
  border: 1px solid var(--line-strong);
  background: transparent;
  color: var(--ink-muted);
  min-height: 40px;
}
.filter-chip:hover { color: var(--ink); border-color: var(--accent); }
.filter-chip[aria-pressed="true"] { background: var(--accent); border-color: var(--accent); color: var(--accent-ink); }

.catalog { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: var(--s-6); }
.orbit-card {
  padding: var(--s-8);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: rgba(255, 255, 255, 0.035);
  display: flex;
  flex-direction: column;
}
.orbit-card__head { display: flex; align-items: baseline; justify-content: space-between; gap: var(--s-4); }
.orbit-card__num {
  font-family: var(--font-head);
  font-weight: 800;
  font-size: 2.5rem;
  line-height: 1;
  color: transparent;
  -webkit-text-stroke: 1px var(--accent);
}
.orbit-card h3 { margin: var(--s-4) 0 var(--s-3); }
.orbit-card p { color: var(--ink-muted); font-size: 0.9375rem; }
.orbit-card__specs { margin-top: var(--s-6); display: grid; gap: 10px; }
.orbit-card__specs div { display: grid; grid-template-columns: 96px 1fr; gap: var(--s-3); font-size: 0.875rem; }
.orbit-card__specs b {
  color: var(--ink-muted);
  font-family: var(--font-head);
  font-weight: 700;
  font-size: 0.6875rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  padding-top: 3px;
}
.orbit-card__specs span { color: var(--ink); }
.orbit-card__cta { margin-top: auto; padding-top: var(--s-6); }

/* ==========================================================================
   Evidenza — pannelli dati (valori non modificati, solo presentazione)
   ========================================================================== */
.data-panels { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: var(--s-6); }
.data-panel {
  padding: var(--s-8);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: rgba(255, 255, 255, 0.04);
}
.data-panel__head {
  display: flex;
  justify-content: space-between;
  gap: var(--s-4);
  font-family: ui-monospace, Consolas, monospace;
  font-size: 0.75rem;
  letter-spacing: 0.1em;
  color: var(--ink-muted);
  text-transform: uppercase;
  margin-bottom: var(--s-4);
}
.data-panel__course { font-weight: 600; margin-bottom: var(--s-6); }
.data-panel__hero-metric .metric__value { font-size: clamp(2.75rem, 2rem + 3vw, 4rem); }
.data-rows { margin-top: var(--s-6); display: grid; gap: var(--s-4); }
.data-row { display: grid; gap: 6px; }
.data-row__top { display: flex; justify-content: space-between; gap: var(--s-4); font-size: 0.875rem; color: var(--ink); }
.data-row__top span:last-child { font-variant-numeric: tabular-nums; font-weight: 600; }
.data-panel .bar { background: rgba(255, 255, 255, 0.12); }

/* ==========================================================================
   Metodo — diagramma a flusso sempre visibile con etichette esterne
   ========================================================================== */
.flow { margin: 0; }
.flow__stage {
  position: relative;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: rgba(255, 255, 255, 0.035);
  padding: clamp(12px, 2vw, 24px);
}
.flow--method .flow__stage { aspect-ratio: 16 / 10; }
.flow__labels, .flow__nodes { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: var(--s-4); }
.flow__labels { margin-top: var(--s-6); }
.flow__num {
  font-family: var(--font-head);
  font-weight: 800;
  font-size: 0.8125rem;
  letter-spacing: 0.1em;
  color: var(--accent);
  display: block;
  margin-bottom: 4px;
}
.flow__label { font-family: var(--font-head); font-weight: 600; font-size: 0.9375rem; }
.flow__nodes { margin-top: var(--s-8); }
.flow__node { position: relative; padding-top: var(--s-6); border-top: 2px solid var(--line-strong); }
.flow__node h3 { margin: var(--s-2) 0 var(--s-2); font-size: 1.0625rem; }
.flow__node p { color: var(--ink-muted); font-size: 0.875rem; }

/* ==========================================================================
   Chi sono
   ========================================================================== */
.founder {
  display: grid;
  grid-template-columns: minmax(260px, 0.8fr) minmax(0, 1.2fr);
  gap: clamp(32px, 5vw, 64px);
  align-items: center;
}
.founder__portrait { margin: 0; position: relative; border-radius: var(--radius); overflow: hidden; border: 1px solid var(--line-strong); }
.founder__portrait img { width: 100%; filter: saturate(0.92) contrast(1.03); }
.founder__portrait::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(11, 28, 36, 0) 45%, rgba(11, 28, 36, 0.72));
}
.founder__body .eyebrow { margin-bottom: var(--s-3); }
.founder-sign { font-family: var(--font-head); font-weight: 700; margin-top: var(--s-6); }
.founder-motto { color: var(--ink-muted); font-style: italic; }
.credential-list { display: grid; gap: 8px; margin: var(--s-6) 0; }
.credential-list li { position: relative; padding-left: 22px; color: var(--ink-muted); }
.credential-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.6em;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--accent);
}

/* ==========================================================================
   FAQ (layout a due colonne) e contatti
   ========================================================================== */
.faq-layout { display: grid; grid-template-columns: minmax(0, 0.8fr) minmax(0, 1.2fr); gap: clamp(32px, 5vw, 72px); align-items: start; }
.faq-layout__aside h2 { margin-bottom: var(--s-3); }
.faq-layout__aside p { color: var(--ink-muted); }

.contact { display: grid; grid-template-columns: minmax(0, 1.2fr) minmax(0, 0.8fr); gap: clamp(32px, 5vw, 64px); align-items: start; }
.contact__form .form { max-width: none; }
.contact-facts { display: grid; gap: var(--s-6); }
.contact-fact { border-top: 1px solid var(--line); padding-top: var(--s-4); }
.contact-fact b {
  display: block;
  font-family: var(--font-head);
  font-size: 0.75rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--ink-muted);
  margin-bottom: 6px;
}
.copy-btn {
  background: none;
  border: 0;
  padding: 0;
  cursor: pointer;
  font: inherit;
  color: var(--ink);
  border-bottom: 1px solid var(--accent);
  min-height: 32px;
}

/* --- lockup di marca nel footer --- */
.brand__lockup { width: min(230px, 60vw); height: auto; }

/* --- fallback leggibile quando il player Lottie non è disponibile --- */
[data-lottie-fallback="true"] .lottie-stage__mount {
  display: grid;
  place-items: center;
  background: radial-gradient(60% 60% at 50% 45%, var(--glow-a), transparent 70%);
}

/* ==========================================================================
   Responsive delle sezioni condivise
   ========================================================================== */
@media (max-width: 1024px) {
  .constellation { grid-template-columns: 1fr; }
  .catalog { grid-template-columns: 1fr; }
  .data-panels { grid-template-columns: 1fr; }
  .founder { grid-template-columns: 1fr; }
  .founder__portrait { max-width: 360px; }
  .faq-layout { grid-template-columns: 1fr; }
  .contact { grid-template-columns: 1fr; }
}
@media (max-width: 720px) {
  .flow__labels, .flow__nodes { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: var(--s-3) var(--s-4); }
}
@media (max-width: 460px) {
  .flow__labels, .flow__nodes { grid-template-columns: 1fr; }
  .orbit-card__specs div { grid-template-columns: 1fr; gap: 2px; }
}