:root {
  --blu: #0f4c81; --blu-scuro: #0a3557; --accento: #1e8449;
  --testo: #1c2833; --tenue: #5d6d7e; --sfondo: #ffffff; --card: #f4f6f8;
  --bordo: #e3e8ee; --rosso: #c0392b;
}
@media (prefers-color-scheme: dark) {
  :root {
    --testo: #e8edf2; --tenue: #a3b1c0; --sfondo: #10161d; --card: #18212b;
    --bordo: #26313d; --blu: #4a90d9;
  }
}
* { box-sizing: border-box; }
body { margin: 0; font-family: system-ui, -apple-system, "Segoe UI", sans-serif;
       color: var(--testo); background: var(--sfondo); line-height: 1.6; }
.wrap { max-width: 1040px; margin: 0 auto; padding: 0 1.25rem; }
a { color: var(--blu); }

header.top { border-bottom: 1px solid var(--bordo); position: sticky; top: 0;
      background: color-mix(in srgb, var(--sfondo) 92%, transparent);
      backdrop-filter: blur(8px); z-index: 10; }
header.top .wrap { display: flex; align-items: center; justify-content: space-between;
      padding-top: .9rem; padding-bottom: .9rem; }
.logo { font-weight: 800; font-size: 1.2rem; letter-spacing: .02em;
      text-decoration: none; color: var(--testo); }
.logo span { color: var(--blu); }
nav a { margin-left: 1.4rem; text-decoration: none; color: var(--tenue);
      font-size: .95rem; }
nav a:hover { color: var(--blu); }
/* pulsante di accesso: diventa «Area riservata» quando c'è una sessione */
nav a.accesso { border: 1px solid var(--blu); color: var(--blu); padding: .35rem .9rem;
      border-radius: .5rem; font-weight: 600; }
nav a.accesso:hover { background: var(--blu); color: #fff; }
@media (max-width: 560px) {
  header.top .wrap { flex-wrap: wrap; gap: .5rem; }
  nav a { margin-left: 0; margin-right: 1rem; }
}

.hero { padding: 4.5rem 0 3.5rem; }
.hero h1 { font-size: clamp(1.9rem, 4.5vw, 3rem); line-height: 1.15; margin: 0 0 1rem;
      letter-spacing: -.02em; }
.hero p { font-size: 1.15rem; color: var(--tenue); max-width: 46rem; margin: 0 0 1.8rem; }
.cta { display: inline-block; background: var(--blu); color: #fff; text-decoration: none;
      padding: .85rem 1.6rem; border-radius: .6rem; font-weight: 600; }
.cta.ghost { background: transparent; color: var(--blu);
      border: 1px solid var(--blu); margin-left: .6rem; }

section { padding: 3.5rem 0; border-top: 1px solid var(--bordo); }
h2 { font-size: 1.6rem; margin: 0 0 .5rem; letter-spacing: -.01em; }
.sub { color: var(--tenue); margin: 0 0 2rem; max-width: 44rem; }

.griglia { display: grid; gap: 1.1rem;
      grid-template-columns: repeat(auto-fit, minmax(255px, 1fr)); }
.scheda { background: var(--card); border: 1px solid var(--bordo); border-radius: .8rem;
      padding: 1.4rem; }
.scheda h3 { margin: .2rem 0 .5rem; font-size: 1.08rem; }
.scheda p { margin: 0; color: var(--tenue); font-size: .95rem; }
.icona { font-size: 1.5rem; line-height: 1; }

.app { display: flex; flex-direction: column; }
.app .testa { display: flex; align-items: center; gap: .6rem; margin-bottom: .3rem; }
.tag { font-size: .7rem; text-transform: uppercase; letter-spacing: .06em;
      padding: .18rem .5rem; border-radius: 1rem; font-weight: 700; }
.tag.live { background: #d5f0e0; color: #1e6b42; }
.tag.dev { background: #fdebd0; color: #8a5a00; }
@media (prefers-color-scheme: dark) {
  .tag.live { background: #14432a; color: #7fd6a5; }
  .tag.dev { background: #4a3612; color: #f0c674; }
}
.app a.vai { margin-top: 1rem; align-self: flex-start; text-decoration: none;
      font-weight: 600; font-size: .95rem; }
.app a.vai::after { content: " →"; }

footer { border-top: 1px solid var(--bordo); padding: 2.5rem 0 3rem;
      color: var(--tenue); font-size: .95rem; }
footer .griglia { gap: 2rem; }
footer b { color: var(--testo); }
.nota { font-size: .82rem; opacity: .75; margin-top: 2rem; }

/* i segnaposto si vedono a colpo d'occhio finché non sono compilati */
.segnaposto { background: #fdebd0; color: #8a5a00; padding: 0 .25rem;
      border-radius: .2rem; font-size: .85em; }
@media (prefers-color-scheme: dark) {
  .segnaposto { background: #4a3612; color: #f0c674; }
}

/* ---------- pagina contatti ---------- */
.contatti-griglia { display: grid; gap: 2.5rem; align-items: start;
      grid-template-columns: minmax(240px, 1fr) minmax(320px, 1.6fr); }
@media (max-width: 760px) { .contatti-griglia { grid-template-columns: 1fr; } }

.campo { margin-bottom: 1.1rem; }
.campo label { display: block; font-size: .9rem; font-weight: 600; margin-bottom: .3rem; }
.campo input, .campo textarea { width: 100%; padding: .75rem; font-size: 1rem;
      font-family: inherit; color: var(--testo); background: var(--sfondo);
      border: 1px solid var(--bordo); border-radius: .5rem; }
.campo input:focus, .campo textarea:focus { outline: 2px solid var(--blu);
      outline-offset: 1px; border-color: var(--blu); }
.campo textarea { min-height: 9rem; resize: vertical; }
.obbligatorio { color: var(--rosso); }

.captcha-riga { display: flex; gap: .8rem; align-items: flex-start; }
.captcha-riga input { flex: 1; }
.captcha-box { display: flex; flex-direction: column; align-items: center; gap: .3rem; }
.captcha-box img { border: 1px solid var(--bordo); border-radius: .4rem;
      background: #fff; height: 52px; }
.captcha-box button { background: none; border: none; color: var(--blu);
      font-size: .8rem; cursor: pointer; padding: 0; text-decoration: underline; }

.privacy { display: flex; gap: .6rem; align-items: flex-start; margin: 1.2rem 0;
      font-size: .9rem; color: var(--tenue); }
.privacy input { margin-top: .3rem; flex-shrink: 0; }

button.invia { background: var(--blu); color: #fff; border: none; border-radius: .6rem;
      padding: .85rem 1.8rem; font-size: 1rem; font-weight: 600; cursor: pointer; }
button.invia:disabled { background: #8fa3b5; cursor: not-allowed; }

.esito { margin-top: 1rem; padding: .9rem 1rem; border-radius: .5rem; font-size: .95rem; }
.esito.ok { background: #d5f0e0; color: #1e6b42; }
.esito.ko { background: #fadbd8; color: #922b21; }
@media (prefers-color-scheme: dark) {
  .esito.ok { background: #14432a; color: #7fd6a5; }
  .esito.ko { background: #4a1d18; color: #f5a49b; }
}
/* trappola per i robot: invisibile agli umani, riempita dagli spambot */
.esca { position: absolute; left: -9999px; opacity: 0; height: 0; overflow: hidden; }