/* =========================================================================
   Zephir Solutions — Portale Strumenti per Studi Commercialisti
   Foglio di stile unico, self-contained, privacy-first.
   Nessuna risorsa esterna: font-stack di sistema, zero CDN, zero telemetria.
   ========================================================================= */

/* ----------------------------- Design tokens ---------------------------- */
:root {
  /* Palette neutra istituzionale (light) */
  --c-bg:            #f4f5f7;
  --c-surface:       #ffffff;
  --c-surface-2:     #fbfcfd;
  --c-border:        #d9dee5;
  --c-border-strong: #c2cad4;

  --c-text:          #1a2028;
  --c-text-soft:     #4a5561;
  --c-text-muted:    #6b7683;

  /* Accento: blu-verde istituzionale (petrolio) */
  --c-accent:        #0f6e78;
  --c-accent-strong: #0b5760;
  --c-accent-soft:   #e3f0f1;
  --c-accent-text:   #ffffff;

  /* Colore fiducia / secondario: blu navy */
  --c-navy:          #1f3a52;

  /* Stati */
  --c-error:         #b3261e;
  --c-error-bg:      #fbe9e7;
  --c-error-border:  #e6b4ae;
  --c-success:       #1c6b45;
  --c-success-bg:    #e4f2ea;

  /* Tipografia */
  --font-sans: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue",
               Arial, "Noto Sans", sans-serif;
  --font-mono: ui-monospace, "SF Mono", "Cascadia Code", "Segoe UI Mono",
               "Roboto Mono", Menlo, Consolas, monospace;

  /* Spaziatura (base 4px) */
  --s-1: 0.25rem;  --s-2: 0.5rem;  --s-3: 0.75rem; --s-4: 1rem;
  --s-5: 1.5rem;   --s-6: 2rem;    --s-7: 3rem;    --s-8: 4rem;

  /* Raggi e ombre */
  --radius:    10px;
  --radius-sm: 7px;
  --shadow-sm: 0 1px 2px rgba(16, 24, 40, 0.06);
  --shadow-md: 0 4px 14px rgba(16, 24, 40, 0.08);
  --shadow-lg: 0 12px 32px rgba(16, 24, 40, 0.12);

  --transition: 160ms ease;
  --content-max: 1120px;
}

@media (prefers-color-scheme: dark) {
  :root {
    --c-bg:            #0e1319;
    --c-surface:       #161d26;
    --c-surface-2:     #1b232e;
    --c-border:        #2a3542;
    --c-border-strong: #3a4756;

    --c-text:          #e8ecf1;
    --c-text-soft:     #b3bcc7;
    --c-text-muted:    #8b97a4;

    --c-accent:        #3fb6c0;
    --c-accent-strong: #63c8d1;
    --c-accent-soft:   #14313340;
    --c-accent-text:   #06222699;

    --c-navy:          #9fbdd6;

    --c-error:         #f2b8b5;
    --c-error-bg:      #3a1f1d;
    --c-error-border:  #6a3a36;
    --c-success:       #7fd6a6;
    --c-success-bg:    #16302380;

    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.4);
    --shadow-md: 0 4px 14px rgba(0, 0, 0, 0.45);
    --shadow-lg: 0 12px 32px rgba(0, 0, 0, 0.55);
  }
  /* In dark il testo dell'accento deve restare leggibile su fondo scuro */
  :root { --c-accent-text: #06171a; }
}

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

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

body {
  margin: 0;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  font-family: var(--font-sans);
  font-size: 1rem;
  line-height: 1.6;
  color: var(--c-text);
  background: var(--c-bg);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

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

a { color: var(--c-accent-strong); text-decoration: none; }
a:hover { text-decoration: underline; }

h1, h2, h3 { line-height: 1.25; color: var(--c-text); font-weight: 650; letter-spacing: -0.01em; }
h1 { font-size: clamp(1.7rem, 4vw, 2.35rem); margin: 0 0 var(--s-3); }
h2 { font-size: clamp(1.3rem, 3vw, 1.6rem); margin: 0 0 var(--s-3); }
h3 { font-size: 1.1rem; margin: 0 0 var(--s-2); }
p  { margin: 0 0 var(--s-4); color: var(--c-text-soft); }

/* Focus visibile e coerente ovunque */
:focus-visible {
  outline: 3px solid var(--c-accent);
  outline-offset: 2px;
  border-radius: 4px;
}

/* ------------------------------- Layout --------------------------------- */
.contenitore {
  width: 100%;
  max-width: var(--content-max);
  margin-inline: auto;
  padding-inline: var(--s-4);
}

.principale { flex: 1 0 auto; padding-block: var(--s-6) var(--s-8); }

/* -------------------------------- Header -------------------------------- */
.intestazione {
  background: var(--c-surface);
  border-bottom: 1px solid var(--c-border);
  position: sticky;
  top: 0;
  z-index: 20;
  backdrop-filter: saturate(1.1);
}
.intestazione__inner {
  display: flex;
  align-items: center;
  gap: var(--s-3);
  padding-block: var(--s-3);
}
.marchio {
  display: inline-flex;
  align-items: center;
  gap: var(--s-3);
  color: var(--c-text);
  font-weight: 600;
}
.marchio:hover { text-decoration: none; }
.marchio__logo {
  flex: none;
  width: 38px; height: 38px;
  border-radius: 9px;
  background: linear-gradient(135deg, var(--c-accent) 0%, var(--c-navy) 100%);
  color: #fff;
  display: grid; place-items: center;
  font-weight: 700; font-size: 1.05rem;
  letter-spacing: -0.02em;
  box-shadow: var(--shadow-sm);
}
.marchio__testo { display: flex; flex-direction: column; line-height: 1.2; }
.marchio__nome  { font-size: 0.98rem; font-weight: 650; }
.marchio__claim { font-size: 0.76rem; color: var(--c-text-muted); font-weight: 500; }
.intestazione__spazio { margin-left: auto; }
.intestazione__badge {
  display: inline-flex; align-items: center; gap: var(--s-2);
  font-size: 0.76rem; font-weight: 600;
  color: var(--c-accent-strong);
  background: var(--c-accent-soft);
  border: 1px solid var(--c-border);
  padding: var(--s-1) var(--s-3);
  border-radius: 999px;
  white-space: nowrap;
}
.intestazione__badge .punto {
  width: 7px; height: 7px; border-radius: 50%;
  background: var(--c-success); flex: none;
}
@media (max-width: 560px) {
  .intestazione__badge { display: none; }
  .marchio__claim { display: none; }
}

/* -------------------------------- Footer -------------------------------- */
.pie {
  flex: none;
  background: var(--c-surface);
  border-top: 1px solid var(--c-border);
  color: var(--c-text-muted);
  font-size: 0.85rem;
}
.pie__inner {
  padding-block: var(--s-5);
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--s-2) var(--s-4);
  justify-content: space-between;
}
.pie__nota { display: flex; flex-wrap: wrap; gap: var(--s-2) var(--s-3); align-items: center; }
.pie__nota span { display: inline-flex; align-items: center; gap: var(--s-2); }
.pie__sep { color: var(--c-border-strong); }
.pie strong { color: var(--c-text-soft); font-weight: 650; }

/* --------------------------------- Hero --------------------------------- */
.hero {
  background:
    radial-gradient(120% 120% at 100% 0%, var(--c-accent-soft) 0%, transparent 55%),
    var(--c-surface);
  border: 1px solid var(--c-border);
  border-radius: var(--radius);
  padding: clamp(var(--s-5), 5vw, var(--s-7));
  box-shadow: var(--shadow-sm);
  margin-bottom: var(--s-6);
}
.hero__occhiello {
  display: inline-flex; align-items: center; gap: var(--s-2);
  font-size: 0.78rem; font-weight: 650; letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--c-accent-strong);
  margin-bottom: var(--s-3);
}
.hero p { max-width: 62ch; font-size: 1.07rem; }
.hero__punti {
  list-style: none; margin: var(--s-4) 0 0; padding: 0;
  display: flex; flex-wrap: wrap; gap: var(--s-2) var(--s-5);
}
.hero__punti li {
  display: inline-flex; align-items: center; gap: var(--s-2);
  font-size: 0.92rem; font-weight: 550; color: var(--c-text-soft);
}
.spunta {
  flex: none; width: 18px; height: 18px; border-radius: 50%;
  background: var(--c-accent-soft); color: var(--c-accent-strong);
  display: grid; place-items: center; font-size: 0.7rem; font-weight: 800;
}

/* ---------------------------- Griglia prodotti -------------------------- */
.griglia {
  display: grid;
  gap: var(--s-4);
  grid-template-columns: 1fr;
}
@media (min-width: 620px)  { .griglia { grid-template-columns: repeat(2, 1fr); } }
@media (min-width: 940px)  { .griglia { grid-template-columns: repeat(3, 1fr); } }

.sezione-titolo {
  display: flex; align-items: baseline; justify-content: space-between;
  gap: var(--s-3); margin-bottom: var(--s-4); flex-wrap: wrap;
}
.sezione-titolo p { margin: 0; }

/* --------------------------------- Card --------------------------------- */
.card {
  display: flex;
  flex-direction: column;
  background: var(--c-surface);
  border: 1px solid var(--c-border);
  border-radius: var(--radius);
  padding: var(--s-5);
  box-shadow: var(--shadow-sm);
  transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
}
.card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-md);
  border-color: var(--c-border-strong);
}
.card__testa {
  display: flex; align-items: flex-start; justify-content: space-between;
  gap: var(--s-3); margin-bottom: var(--s-2);
}
.card__nome { margin: 0; }
.card__sottotitolo { color: var(--c-text-muted); font-size: 0.92rem; margin: 0 0 var(--s-4); }
.card__punti {
  list-style: none; margin: 0 0 var(--s-5); padding: 0;
  display: flex; flex-direction: column; gap: var(--s-2);
}
.card__punti li {
  position: relative; padding-left: var(--s-5);
  font-size: 0.92rem; color: var(--c-text-soft);
}
.card__punti li::before {
  content: ""; position: absolute; left: 2px; top: 0.6em;
  width: 8px; height: 8px; border-radius: 2px;
  background: var(--c-accent); opacity: 0.85;
}
.card__azione { margin-top: auto; }

/* Badge versione */
.badge {
  flex: none;
  display: inline-flex; align-items: center;
  font-size: 0.72rem; font-weight: 650; letter-spacing: 0.02em;
  color: var(--c-navy);
  background: var(--c-surface-2);
  border: 1px solid var(--c-border-strong);
  padding: 2px var(--s-2);
  border-radius: 999px;
  white-space: nowrap;
}

/* -------------------------------- Bottoni ------------------------------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: var(--s-2);
  font-family: inherit; font-size: 0.95rem; font-weight: 600;
  line-height: 1; text-align: center;
  padding: var(--s-3) var(--s-5);
  border-radius: var(--radius-sm);
  border: 1px solid transparent;
  cursor: pointer;
  transition: background var(--transition), color var(--transition),
              border-color var(--transition), transform var(--transition);
  min-height: 44px; /* touch target accessibile */
}
.btn:hover { text-decoration: none; }
.btn:active { transform: translateY(1px); }
.btn:disabled { opacity: 0.6; cursor: not-allowed; }

.btn--primario {
  background: var(--c-accent);
  color: var(--c-accent-text);
  border-color: var(--c-accent);
}
.btn--primario:hover { background: var(--c-accent-strong); border-color: var(--c-accent-strong); }

.btn--secondario {
  background: var(--c-surface);
  color: var(--c-text);
  border-color: var(--c-border-strong);
}
.btn--secondario:hover { background: var(--c-surface-2); border-color: var(--c-text-muted); }

.btn--blocco { width: 100%; }
.btn--grande { font-size: 1.05rem; padding: var(--s-4) var(--s-6); min-height: 54px; }

.link-tenue {
  display: inline-block; margin-top: var(--s-4);
  font-size: 0.88rem; color: var(--c-text-muted);
}

/* ------------------------- Pagina dettaglio prodotto -------------------- */
.torna {
  display: inline-flex; align-items: center; gap: var(--s-2);
  font-size: 0.88rem; color: var(--c-text-muted); margin-bottom: var(--s-4);
}
.dettaglio {
  display: grid; gap: var(--s-6);
  grid-template-columns: 1fr;
  align-items: start;
}
@media (min-width: 900px) {
  .dettaglio { grid-template-columns: 1.6fr 1fr; }
  .dettaglio__pannello { position: sticky; top: 88px; }
}
.dettaglio__testa {
  display: flex; flex-wrap: wrap; align-items: center; gap: var(--s-3);
  margin-bottom: var(--s-2);
}
.dettaglio__sottotitolo { font-size: 1.1rem; color: var(--c-text-soft); margin-bottom: var(--s-5); }

.meta {
  display: flex; flex-wrap: wrap; gap: var(--s-2) var(--s-5);
  padding: var(--s-4) 0;
  border-block: 1px solid var(--c-border);
  margin-bottom: var(--s-5);
}
.meta__voce { display: flex; flex-direction: column; }
.meta__etichetta { font-size: 0.72rem; text-transform: uppercase; letter-spacing: 0.04em; color: var(--c-text-muted); }
.meta__valore { font-weight: 600; font-family: var(--font-mono); font-size: 0.95rem; }

.elenco-punti { list-style: none; margin: var(--s-3) 0 var(--s-6); padding: 0; display: grid; gap: var(--s-3); }
.elenco-punti li { display: flex; gap: var(--s-3); align-items: flex-start; color: var(--c-text-soft); }
.elenco-punti li .spunta { margin-top: 2px; }

/* -------------------------- Pannello / Form ----------------------------- */
.pannello {
  background: var(--c-surface);
  border: 1px solid var(--c-border);
  border-radius: var(--radius);
  box-shadow: var(--shadow-md);
  padding: var(--s-5);
}
.pannello--centro {
  max-width: 460px; margin-inline: auto;
}
.pannello__titolo { display: flex; align-items: center; gap: var(--s-2); }
.pannello__nota { font-size: 0.86rem; color: var(--c-text-muted); }

.campo { margin-bottom: var(--s-4); }
.campo:last-of-type { margin-bottom: var(--s-5); }
.campo label {
  display: block; font-size: 0.88rem; font-weight: 600;
  color: var(--c-text); margin-bottom: var(--s-2);
}
.campo .obbligatorio { color: var(--c-accent-strong); }

.input {
  width: 100%;
  font-family: inherit; font-size: 1rem;
  color: var(--c-text);
  background: var(--c-surface-2);
  border: 1px solid var(--c-border-strong);
  border-radius: var(--radius-sm);
  padding: var(--s-3) var(--s-4);
  min-height: 46px;
  transition: border-color var(--transition), box-shadow var(--transition);
}
.input::placeholder { color: var(--c-text-muted); }
.input:focus {
  outline: none;
  border-color: var(--c-accent);
  box-shadow: 0 0 0 3px var(--c-accent-soft);
}

/* Campo codice OTP */
.input--otp {
  text-align: center;
  font-family: var(--font-mono);
  font-size: 1.9rem;
  letter-spacing: 0.5em;
  padding-left: 0.5em; /* compensa letter-spacing */
  font-weight: 600;
}

/* Box informativo / errore / successo */
.avviso {
  display: flex; gap: var(--s-3); align-items: flex-start;
  border-radius: var(--radius-sm);
  padding: var(--s-3) var(--s-4);
  font-size: 0.9rem;
  margin-bottom: var(--s-5);
  border: 1px solid transparent;
}
.avviso__icona { flex: none; font-weight: 800; }
.avviso--errore {
  background: var(--c-error-bg); color: var(--c-error);
  border-color: var(--c-error-border);
}
.avviso--errore .avviso__icona { color: var(--c-error); }
.avviso--info {
  background: var(--c-accent-soft); color: var(--c-accent-strong);
  border-color: var(--c-border);
}
.avviso--successo {
  background: var(--c-success-bg); color: var(--c-success);
  border-color: var(--c-border);
}

/* -------------------- Pagine verifica / esito / errore ------------------ */
.centrato { text-align: center; }
.icona-grande {
  width: 64px; height: 64px; margin: 0 auto var(--s-4);
  border-radius: 50%;
  display: grid; place-items: center;
  font-size: 1.8rem; font-weight: 800;
}
.icona-grande--ok    { background: var(--c-success-bg); color: var(--c-success); }
.icona-grande--mail  { background: var(--c-accent-soft); color: var(--c-accent-strong); }
.icona-grande--stop  { background: var(--c-error-bg); color: var(--c-error); }

.evidenzia-mail {
  font-weight: 650; color: var(--c-text);
  word-break: break-all;
}

.istruzioni {
  text-align: left;
  background: var(--c-surface-2);
  border: 1px solid var(--c-border);
  border-radius: var(--radius-sm);
  padding: var(--s-4) var(--s-5);
  margin-top: var(--s-5);
}
.istruzioni h3 { margin-bottom: var(--s-2); font-size: 0.95rem; }
.istruzioni ol { margin: 0; padding-left: 1.2rem; color: var(--c-text-soft); font-size: 0.92rem; }
.istruzioni li { margin-bottom: var(--s-1); }

.scadenza {
  display: inline-flex; align-items: center; gap: var(--s-2);
  font-size: 0.85rem; color: var(--c-text-muted);
  margin-top: var(--s-4);
}

/* Utilità */
.mt-0 { margin-top: 0; }
.mb-0 { margin-bottom: 0; }
.testo-piccolo { font-size: 0.85rem; color: var(--c-text-muted); }
.sr-only {
  position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; border: 0;
}

@media (prefers-reduced-motion: reduce) {
  * { transition: none !important; animation: none !important; }
  .card:hover { transform: none; }
}

/* Indicatore passo nel flusso "Scarica la demo" */
.passo-indicatore{
  font-size:.82rem; letter-spacing:.04em; text-transform:uppercase;
  color:var(--accento,#0f6e78); opacity:.85; margin:0 0 .35rem;
}