/* Demo Atlantia — nessun font esterno (niente chiamate a Google Fonts: GDPR) */
:root {
  --teal: #16C6A0;          /* colore del marchio */
  --teal-scuro: #0A7D66;    /* pulsanti e link: contrasto AA su bianco */
  --teal-chiaro: #E3F7F1;
  --inchiostro: #12302A;
  --grigio: #5A6B67;
  --linea: #D9E5E1;
  --nebbia: #F3F8F6;
  --bianco: #FFFFFF;
  --ia: #4446B0;            /* tutti i marchi IA usano questo colore */
  --ia-fondo: #EEEEFA;
  --ambra: #8A5300;
  --ambra-fondo: #FFF3DD;
  --errore: #B3261E;
  --errore-fondo: #FDECEA;
  --font: "Segoe UI", system-ui, -apple-system, Roboto, "Helvetica Neue", Arial, sans-serif;
  --mono: ui-monospace, "Cascadia Mono", Consolas, "Liberation Mono", monospace;
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  font-family: var(--font);
  font-size: 1rem;
  line-height: 1.55;
  color: var(--inchiostro);
  background: var(--nebbia);
}
a { color: var(--teal-scuro); }
img { max-width: 100%; }
:focus-visible { outline: 3px solid var(--ia); outline-offset: 2px; border-radius: 4px; }

/* ---------- Pulsanti ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center;
  gap: .4em; min-height: 44px; padding: .6em 1.2em;
  font: inherit; font-weight: 600; text-decoration: none;
  border: 2px solid transparent; border-radius: 10px; cursor: pointer;
}
.btn-primario { background: var(--teal-scuro); color: var(--bianco); }
.btn-primario:hover { background: #086A57; }
.btn-secondario { background: var(--bianco); color: var(--teal-scuro); border-color: var(--teal-scuro); }
.btn-secondario:hover { background: var(--teal-chiaro); }
.btn-testo { background: none; color: var(--grigio); }
.btn-testo:hover { color: var(--inchiostro); text-decoration: underline; }
.btn-piccolo { min-height: 36px; padding: .35em .9em; font-size: .9rem; }
.btn:disabled { opacity: .6; cursor: progress; }

.avviso { padding: .75em 1em; border-radius: 10px; margin: 0 0 1em; }
.avviso-errore { background: var(--errore-fondo); color: var(--errore); }

/* ---------- Marchi IA ---------- */
.chip-ia {
  display: inline-flex; align-items: center; gap: .45em;
  padding: .2em .7em .2em .25em; border-radius: 999px;
  background: var(--ia-fondo); color: var(--ia);
  font-size: .8rem; font-weight: 600; white-space: nowrap;
}
.chip-ia-sigla {
  display: inline-grid; place-items: center; flex: none;
  width: 1.9em; height: 1.9em; border-radius: 50%;
  background: var(--ia); color: var(--bianco);
  font-size: .72rem; font-weight: 700; letter-spacing: .02em;
}

/* ---------- Login ---------- */
.pagina-login { background: var(--bianco); }
.login {
  display: grid; grid-template-columns: minmax(0, 1.1fr) minmax(0, 1fr);
  min-height: calc(100vh - 80px);
}
.login-intro {
  background: var(--teal); color: var(--inchiostro);
  padding: clamp(2rem, 6vw, 5rem);
  display: flex; flex-direction: column; justify-content: center;
}
.login-logo { width: 88px; height: 88px; border-radius: 50%; background: var(--bianco); padding: 4px; }
.login-intro h1 {
  font-size: clamp(2rem, 4.2vw, 3.4rem); line-height: 1.05;
  letter-spacing: -.02em; margin: 1.2rem 0 .8rem; max-width: 12ch;
}
.login-sottotitolo { font-size: 1.125rem; max-width: 46ch; margin: 0 0 2rem; }
.login-cosa { list-style: none; margin: 0; padding: 0; max-width: 52ch; }
.login-cosa li {
  padding: 1rem 0; border-top: 2px solid rgba(18, 48, 42, .18);
}
.login-cosa strong { display: block; }

.login-form-wrap { display: grid; place-items: center; padding: 2rem clamp(1.25rem, 5vw, 4rem); }
.login-form { width: 100%; max-width: 380px; }
.login-form h2 { font-size: 1.6rem; margin: 0 0 .25rem; }
.login-nota { color: var(--grigio); margin: 0 0 1.5rem; }
.login-form label { display: block; font-weight: 600; margin: 0 0 .35rem; }
.login-form input[type="text"], .login-form input[type="password"] {
  width: 100%; font: inherit; padding: .7em .85em; margin-bottom: 1.1rem;
  border: 2px solid var(--linea); border-radius: 10px; background: var(--bianco); color: inherit;
}
.login-form input:focus { border-color: var(--teal-scuro); outline: none; box-shadow: 0 0 0 3px var(--teal-chiaro); }
.spunta {
  display: flex !important; gap: .7em; align-items: flex-start;
  font-weight: 400 !important; font-size: .9rem; color: var(--grigio);
  background: var(--nebbia); padding: .85em; border-radius: 10px; margin: .2rem 0 1.2rem !important;
}
.spunta input { width: 1.15em; height: 1.15em; margin-top: .15em; flex: none; accent-color: var(--teal-scuro); }
.login-form .btn { width: 100%; }
.login-link { font-size: .9rem; color: var(--grigio); text-align: center; margin-top: 1.25rem; }

/* ---------- Barra superiore ---------- */
.barra {
  position: sticky; top: 0; z-index: 10;
  display: flex; align-items: center; gap: 1rem;
  padding: .55rem clamp(1rem, 3vw, 2rem);
  background: var(--bianco); border-bottom: 1px solid var(--linea);
}
.barra-marchio { display: flex; align-items: center; gap: .6rem; color: var(--inchiostro); text-decoration: none; font-weight: 700; font-size: 1.15rem; }
.barra-marchio img { border-radius: 50%; }
.chip-demo {
  background: var(--ambra-fondo); color: var(--ambra);
  font-size: .8rem; font-weight: 700; padding: .25em .75em; border-radius: 999px;
}
.barra-destra { margin-left: auto; display: flex; align-items: center; gap: .6rem; }
.barra-utente { color: var(--grigio); font-size: .9rem; }

.striscia-demo {
  margin: 0; padding: .6rem clamp(1rem, 3vw, 2rem);
  background: var(--ambra-fondo); color: var(--ambra); font-size: .9rem;
}

/* ---------- Layout corso ---------- */
.layout {
  display: grid; grid-template-columns: 300px minmax(0, 1fr);
  gap: clamp(1rem, 3vw, 2.5rem);
  max-width: 1240px; margin: 0 auto; padding: 1.5rem clamp(1rem, 3vw, 2rem) 3rem;
}
.indice-box {
  position: sticky; top: 72px;
  background: var(--bianco); border: 1px solid var(--linea); border-radius: 14px;
  padding: 1.1rem;
}
.indice-box summary { list-style: none; cursor: default; }
.indice-box summary::-webkit-details-marker { display: none; }
.indice-titolo { display: block; font-size: 1.3rem; font-weight: 700; }
.indice-classe { display: block; color: var(--grigio); font-size: .9rem; }
.avanzamento { margin: 1rem 0; font-size: .85rem; color: var(--grigio); }
.avanzamento-barra { height: 6px; background: var(--nebbia); border-radius: 3px; overflow: hidden; margin-bottom: .35rem; }
.avanzamento-barra span { display: block; height: 100%; width: 0; background: var(--teal); transition: width .4s ease; }

.lezioni { list-style: none; margin: 0; padding: 0; }
.lezione-link {
  display: flex; gap: .75rem; align-items: flex-start;
  padding: .7rem .6rem; border-radius: 10px;
  color: var(--inchiostro); text-decoration: none;
}
.lezione-link:hover { background: var(--nebbia); }
.lezione-link.attiva { background: var(--teal-chiaro); }
.lezione-stato {
  flex: none; display: grid; place-items: center;
  width: 1.9rem; height: 1.9rem; border-radius: 50%;
  border: 2px solid var(--linea); font-weight: 700; font-size: .85rem; color: var(--grigio);
}
.lezione-link.attiva .lezione-stato { border-color: var(--teal-scuro); color: var(--teal-scuro); }
.lezione-link.fatta .lezione-stato { background: var(--teal-scuro); border-color: var(--teal-scuro); color: var(--bianco); }
.lezione-nome { display: block; font-weight: 600; line-height: 1.3; }
.lezione-info { display: block; font-size: .8rem; color: var(--grigio); }
.indice-nota { font-size: .85rem; color: var(--grigio); border-top: 1px solid var(--linea); padding-top: .9rem; margin: .8rem 0 0; }

/* ---------- Lezione ---------- */
.contenuto { max-width: 800px; outline: none; }
.caricamento { color: var(--grigio); }
.lezione-testa h1 { font-size: clamp(1.7rem, 3.2vw, 2.4rem); line-height: 1.15; letter-spacing: -.01em; margin: .1rem 0 1.2rem; }
.lezione-numero { margin: 0; color: var(--teal-scuro); font-weight: 700; }

.banner-ia {
  display: flex; gap: .8rem; align-items: flex-start;
  background: var(--ia-fondo); color: var(--ia);
  border-left: 4px solid var(--ia); border-radius: 0 12px 12px 0;
  padding: .9rem 1.1rem; margin-bottom: 1.5rem; font-size: .92rem;
}
.banner-ia p { margin: 0; }
.banner-ia .chip-ia-sigla { margin-top: .05em; }

.sezione {
  background: var(--bianco); border: 1px solid var(--linea); border-radius: 14px;
  padding: clamp(1.1rem, 3vw, 1.8rem); margin-bottom: 1.5rem;
}
.sezione-testa { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: .5rem 1rem; margin-bottom: 1rem; }
.sezione-testa h2 { font-size: 1.3rem; margin: 0; }
.sezione-aggiornamento { background: var(--ambra-fondo); border-color: transparent; color: var(--ambra); }
.sezione-aggiornamento h2 { margin-top: 0; }

.materiale { max-width: 68ch; font-size: 1.04rem; }
.materiale h3 { font-size: 1.12rem; margin: 1.6em 0 .4em; }
.materiale p, .materiale ul { margin: 0 0 1em; }
.materiale li { margin-bottom: .35em; }
.materiale code { font-family: var(--mono); font-size: .9em; background: var(--nebbia); padding: .1em .35em; border-radius: 4px; }
.materiale pre {
  background: var(--inchiostro); color: #E6F4EF; padding: 1rem 1.1rem;
  border-radius: 10px; overflow-x: auto; font-size: .9rem; line-height: 1.5;
}
.materiale pre code { background: none; padding: 0; color: inherit; }

.video-box { position: relative; border-radius: 12px; overflow: hidden; background: #000; }
.video-box video { display: block; width: 100%; aspect-ratio: 16 / 9; background: #000; }
.video-filigrana {
  position: absolute; top: .7rem; right: .8rem; pointer-events: none;
  color: rgba(255, 255, 255, .7); font-size: .8rem; font-weight: 700;
  background: rgba(0, 0, 0, .35); padding: .2em .6em; border-radius: 6px;
}
.video-assente {
  aspect-ratio: 16 / 9; display: grid; place-items: center; text-align: center;
  padding: 1.5rem; border-radius: 12px;
  background: repeating-linear-gradient(135deg, var(--nebbia) 0 14px, var(--bianco) 14px 28px);
  border: 2px dashed var(--linea); color: var(--grigio);
}
.video-assente p { max-width: 42ch; margin: 0; }

/* ---------- Verifica ---------- */
.verifica-intro { color: var(--grigio); margin: -.4rem 0 1.2rem; }
.domanda { border: 1px solid var(--linea); border-radius: 12px; padding: 1rem 1.1rem; margin: 0 0 1rem; }
.domanda legend { display: flex; gap: .6rem; font-weight: 600; padding: 0 .3rem; float: left; width: 100%; margin-bottom: .7rem; }
.domanda legend + * { clear: both; }
.domanda-num {
  flex: none; display: grid; place-items: center;
  width: 1.6rem; height: 1.6rem; border-radius: 50%;
  background: var(--teal-chiaro); color: var(--teal-scuro); font-size: .8rem;
}
.opzione {
  display: flex; gap: .65rem; align-items: flex-start; clear: both;
  padding: .55rem .7rem; border: 1px solid var(--linea); border-radius: 8px; margin-bottom: .45rem; cursor: pointer;
}
.opzione:hover { background: var(--nebbia); }
.opzione input { margin-top: .25em; accent-color: var(--teal-scuro); flex: none; }
.opzione:has(input:checked) { border-color: var(--teal-scuro); background: var(--teal-chiaro); }
.domanda.giusta { border-color: var(--teal-scuro); }
.domanda.sbagliata { border-color: var(--errore); }
.domanda.sbagliata .opzione:has(input:checked) { border-color: var(--errore); background: var(--errore-fondo); }
.opzione.opzione-corretta { border-color: var(--teal-scuro); background: var(--teal-chiaro); font-weight: 600; }
.domanda-esito { margin: .6rem 0 0; font-size: .92rem; }
.domanda.giusta .domanda-esito { color: var(--teal-scuro); }
.domanda.sbagliata .domanda-esito { color: var(--errore); }
.verifica-azioni { display: flex; flex-wrap: wrap; align-items: center; gap: 1rem; }
.verifica-msg { margin: 0; }

.nav-lezioni { display: flex; justify-content: space-between; gap: 1rem; flex-wrap: wrap; margin-top: .5rem; }

/* ---------- Piè di pagina ---------- */
.piede { border-top: 1px solid var(--linea); background: var(--bianco); padding: 1.2rem clamp(1rem, 3vw, 2rem); }
.pagina-app .piede { padding-bottom: 6rem; }
.piede p { max-width: 900px; margin: 0 auto; font-size: .82rem; color: var(--grigio); text-align: center; }
.piede-login { background: var(--bianco); }

/* ---------- Visore documento (come il riquadro PDF della piattaforma) ---------- */
.doc { border: 1px solid #8A9692; border-radius: 6px; overflow: hidden; background: #6F7875; }
.doc-foglio {
  height: min(70vh, 620px); overflow-y: auto; background: var(--bianco);
  padding: clamp(1.25rem, 5vw, 3.5rem) clamp(1.1rem, 6vw, 4.5rem);
  outline: none;
}
.doc-foglio:focus-visible { box-shadow: inset 0 0 0 3px var(--ia); }
.doc-titolo { font-size: 1.45em; margin: 0 0 .8em; }
.doc-barra {
  display: flex; flex-wrap: wrap; align-items: center; gap: .35rem;
  padding: .35rem .5rem; background: #6F7875; color: #F2F5F4; font-size: .8rem;
}
.doc-barra button {
  display: grid; place-items: center; width: 34px; height: 30px; padding: 0;
  font: inherit; font-size: 1rem; font-weight: 700; line-height: 1;
  color: var(--bianco); background: #59625F; border: 1px solid #4A524F; border-radius: 4px; cursor: pointer;
}
.doc-barra button:hover:not(:disabled) { background: #4A524F; }
.doc-barra button:disabled { opacity: .45; cursor: default; }
.doc-pagina { margin: 0 .7rem 0 .4rem; min-width: 6.5em; }
.doc-zoom { margin-left: .4rem; }
.doc-pdf iframe { display: block; width: 100%; height: min(75vh, 680px); border: 0; background: var(--bianco); }
.doc-alternativa { margin: .6rem 0 0; font-size: .9rem; }

/* ---------- Tutor AI ---------- */
.sr-only { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }
.tutor-btn {
  position: fixed; left: 1.1rem; bottom: 1.1rem; z-index: 20;
  width: 68px; height: 68px; padding: 2px; border: 0; border-radius: 50%;
  background: var(--bianco); cursor: pointer;
  box-shadow: 0 4px 14px rgba(10, 125, 102, .35);
}
.tutor-btn img { display: block; width: 100%; height: 100%; border-radius: 50%; }
.tutor-btn[aria-expanded="true"] { box-shadow: 0 0 0 4px var(--ia-fondo), 0 0 0 6px var(--ia); }
.tutor-pannello {
  position: fixed; left: 1.1rem; bottom: 6.2rem; z-index: 20;
  width: min(360px, calc(100vw - 2.2rem));
  background: var(--bianco); border: 1px solid var(--linea); border-radius: 16px;
  padding: 1.1rem; box-shadow: 0 12px 32px rgba(18, 48, 42, .18);
}
.tutor-testa { display: flex; align-items: center; gap: .6rem; margin-bottom: .8rem; }
.tutor-testa h2 { font-size: 1.15rem; margin: 0; white-space: nowrap; }
.tutor-chiudi {
  margin-left: auto; width: 36px; height: 36px; border: 0; border-radius: 50%;
  background: none; font-size: 1.5rem; line-height: 1; color: var(--grigio); cursor: pointer;
}
.tutor-chiudi:hover { background: var(--nebbia); color: var(--inchiostro); }
.tutor-messaggio { margin: 0 0 .9rem; background: var(--nebbia); padding: .8rem .9rem; border-radius: 4px 14px 14px 14px; }
.tutor-campo { display: flex; gap: .4rem; margin-bottom: .6rem; }
.tutor-campo input { flex: 1; min-width: 0; font: inherit; font-size: .9rem; padding: .55em .7em; border: 1px solid var(--linea); border-radius: 8px; background: var(--nebbia); }
.tutor-campo button { font: inherit; font-size: .9rem; padding: 0 .9em; border: 0; border-radius: 8px; background: var(--linea); color: var(--grigio); }
.tutor-avviso { font-size: .8rem; color: var(--ia); margin: 0 0 .9rem; }
.tutor-pannello .btn { width: 100%; }
@media (max-width: 900px) {
  /* su tablet e telefono il tutor va a destra: a sinistra coprirebbe le frecce del visore */
  .tutor-btn { left: auto; right: 1rem; }
  .tutor-pannello { left: auto; right: 1rem; }
  .doc-barra { padding-right: 5.2rem; }
}
@media (max-width: 560px) {
  .tutor-btn { width: 54px; height: 54px; right: .8rem; bottom: .8rem; }
  .tutor-pannello { right: .8rem; bottom: 4.8rem; }
  .doc-barra { flex-wrap: nowrap; padding-right: 4.6rem; }
  .doc-pagina { margin: 0 .4rem; min-width: 0; white-space: nowrap; }
  .doc-zoom { display: none; }
  .doc-foglio { height: min(62vh, 560px); }
}

/* ---------- Banner privacy (overlay) ---------- */
.privacy-bloccato, .privacy-bloccato body { overflow: hidden; }
.privacy-velo {
  position: fixed; inset: 0; z-index: 100;
  display: grid; place-items: center; padding: 1rem;
  background: rgba(18, 48, 42, .62);
}
.privacy-box {
  width: min(560px, 100%); max-height: calc(100vh - 2rem); overflow-y: auto;
  background: var(--bianco); border-radius: 16px; padding: clamp(1.25rem, 4vw, 2rem);
  border-top: 6px solid var(--teal);
  box-shadow: 0 20px 50px rgba(0, 0, 0, .3);
}
.privacy-box h2 { margin: 0 0 .8rem; font-size: 1.4rem; }
.privacy-box p { margin: 0 0 .8rem; font-size: .95rem; }
.privacy-azioni { display: flex; flex-wrap: wrap; gap: .6rem; align-items: center; margin-top: 1.2rem; }

/* ---------- Pagina contatti ---------- */
.contatti {
  display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1.1fr);
  gap: clamp(1.5rem, 5vw, 4rem); max-width: 1100px; margin: 0 auto;
  padding: clamp(1.5rem, 5vw, 3.5rem) clamp(1rem, 3vw, 2rem);
}
.contatti-intro h1 { font-size: clamp(2rem, 4vw, 3rem); line-height: 1.05; letter-spacing: -.02em; margin: 0 0 1rem; }
.contatti-intro > p { font-size: 1.1rem; max-width: 44ch; margin: 0 0 2rem; }
.contatti-recapiti { margin: 0; }
.contatti-recapiti dt { font-weight: 700; font-size: .85rem; color: var(--grigio); margin-top: 1rem; }
.contatti-recapiti dd { margin: .15rem 0 0; font-size: 1.15rem; }
.contatti-modulo form, .esito-ok {
  background: var(--bianco); border: 1px solid var(--linea); border-radius: 14px;
  padding: clamp(1.25rem, 4vw, 2rem);
}
.contatti-modulo h2 { margin: 0 0 1.2rem; font-size: 1.35rem; }
.contatti-modulo label { display: block; font-weight: 600; margin: 0 0 .35rem; }
.contatti-modulo input[type="text"], .contatti-modulo input[type="email"], .contatti-modulo input[type="tel"],
.contatti-modulo select, .contatti-modulo textarea {
  width: 100%; font: inherit; padding: .7em .85em; margin-bottom: 1.1rem;
  border: 2px solid var(--linea); border-radius: 10px; background: var(--bianco); color: inherit;
}
.contatti-modulo textarea { resize: vertical; }
.contatti-modulo input:focus, .contatti-modulo select:focus, .contatti-modulo textarea:focus {
  border-color: var(--teal-scuro); outline: none; box-shadow: 0 0 0 3px var(--teal-chiaro);
}
.contatti-modulo input[aria-invalid="true"], .contatti-modulo textarea[aria-invalid="true"] { border-color: var(--errore); margin-bottom: .3rem; }
.campo-errore { color: var(--errore); font-size: .88rem; margin: 0 0 1rem; }
.facoltativo { font-weight: 400; color: var(--grigio); font-size: .88em; }
.contatti-modulo .btn { width: 100%; }
.esito-ok { border-top: 6px solid var(--teal); }
.esito-ok h2 { color: var(--teal-scuro); }
.trappola { position: absolute; left: -9999px; width: 1px; height: 1px; overflow: hidden; }

/* ---------- Footer con crediti Warden ---------- */
.piede-ia { font-size: .82rem; color: var(--grigio); }
.piede-warden {
  display: flex; align-items: center; justify-content: center; gap: .5rem;
  margin-top: .9rem !important; font-size: .95rem !important; color: var(--inchiostro) !important;
}
.piede-warden strong { color: var(--teal-scuro); }
.warden-badge { flex: none; }
.piede-crediti { margin-top: .4rem !important; }
.piede-crediti a { color: var(--inchiostro); text-decoration: none; }
.piede-crediti a:hover { text-decoration: underline; }
.piede-link { display: flex; justify-content: center; flex-wrap: wrap; gap: .4rem 1.2rem; margin-top: .6rem !important; }
@media (max-width: 900px) {
  .contatti { grid-template-columns: 1fr; }
}

/* ---------- Responsive ---------- */
@media (max-width: 900px) {
  .login { grid-template-columns: 1fr; min-height: 0; }
  .login-intro h1 { max-width: none; }
  .layout { grid-template-columns: 1fr; padding-top: 1rem; }
  .indice-box { position: static; }
  .indice-box summary { cursor: pointer; position: relative; padding-right: 2rem; }
  .indice-box summary::after {
    content: ""; position: absolute; right: .3rem; top: .55rem;
    width: .6rem; height: .6rem; border-right: 2px solid var(--grigio); border-bottom: 2px solid var(--grigio);
    transform: rotate(45deg); transition: transform .2s;
  }
  .indice-box[open] summary::after { transform: rotate(-135deg); top: .8rem; }
  .barra-utente { display: none; }
}
@media (max-width: 560px) {
  .barra { flex-wrap: wrap; gap: .5rem; }
  .barra-destra { width: 100%; justify-content: space-between; margin-left: 0; }
  .nav-lezioni .btn { width: 100%; }
}
@media (prefers-reduced-motion: reduce) {
  * { transition: none !important; scroll-behavior: auto !important; }
}