/* MyBook — vetrina. Un foglio solo, nessuno script, nessun font esterno: la
   pagina deve aprirsi su una connessione lenta prima che il pollice arrivi al
   pulsante di download. Le serif sono quelle del sistema, come nell'app.

   I colori sono quelli dell'app: inchiostro blu-viola su carta calda, con una
   scintilla ambra. In tema scuro si inverte la carta, non l'inchiostro. */

:root {
  --inchiostro: #3f3c96;
  --inchiostro-2: #2a2870;
  --scintilla: #e0a030;
  --carta: #fbf7ef;
  --carta-2: #f3ede1;
  --foglio: #ffffff;
  --testo: #23212e;
  --tenue: #5d5a6b;
  --bordo: rgba(35, 33, 46, 0.12);
  --ombra: 0 30px 60px -30px rgba(42, 40, 112, 0.45);
  --serif: "Iowan Old Style", "Palatino Linotype", Palatino, "Book Antiqua", Georgia, "Noto Serif", serif;
  --sans: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", sans-serif;
  color-scheme: light dark;
}

@media (prefers-color-scheme: dark) {
  :root {
    --inchiostro: #b3b0ff;
    --inchiostro-2: #8480ee;
    --carta: #14131b;
    --carta-2: #1b1a25;
    --foglio: #1f1e2b;
    --testo: #ecebf5;
    --tenue: #aaa7bb;
    --bordo: rgba(236, 235, 245, 0.12);
    --ombra: 0 30px 60px -30px rgba(0, 0, 0, 0.85);
  }
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--carta);
  color: var(--testo);
  font: 17px/1.65 var(--sans);
  -webkit-text-size-adjust: 100%;
}

a { color: var(--inchiostro); }

.salta {
  position: absolute;
  left: -9999px;
}
.salta:focus {
  left: 12px;
  top: 12px;
  z-index: 9;
  background: var(--inchiostro);
  color: #fff;
  padding: 8px 14px;
  border-radius: 8px;
}

.sr {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip-path: inset(50%);
  white-space: nowrap;
}

/* ------------------------------------------------------------------ barra */
.barra {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 14px clamp(16px, 4vw, 40px);
  border-bottom: 1px solid var(--bordo);
}

.marchio {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  margin: 0;
  font: 700 21px/1 var(--serif);
  color: var(--testo);
  text-decoration: none;
}

.logo {
  display: inline-block;
  width: 30px;
  height: 30px;
  border-radius: 8px;
  background: url("/icona-192.png") center / cover;
}

.lingue details { position: relative; }
.lingue summary {
  cursor: pointer;
  list-style: none;
  font: 600 13px/1 var(--sans);
  color: var(--tenue);
  border: 1px solid var(--bordo);
  border-radius: 8px;
  padding: 9px 12px;
}
.lingue summary::-webkit-details-marker { display: none; }
.lingue ul {
  position: absolute;
  inset-inline-end: 0;
  margin: 8px 0 0;
  padding: 6px;
  list-style: none;
  background: var(--foglio);
  border: 1px solid var(--bordo);
  border-radius: 12px;
  box-shadow: var(--ombra);
  min-width: 170px;
  max-height: 60vh;
  overflow: auto;
  z-index: 5;
}
.lingue a {
  display: block;
  padding: 7px 10px;
  border-radius: 6px;
  color: var(--testo);
  text-decoration: none;
  font-size: 14px;
}
.lingue a:hover, .lingue a:focus { background: var(--carta-2); }
.lingue a[aria-current] { color: var(--inchiostro); font-weight: 700; }

/* ------------------------------------------------------------------- eroe */
.eroe {
  max-width: 1100px;
  margin: 0 auto;
  padding: clamp(32px, 7vw, 84px) clamp(16px, 4vw, 40px) clamp(28px, 5vw, 60px);
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: clamp(28px, 5vw, 64px);
  align-items: center;
}

.pillola {
  display: inline-block;
  margin: 0 0 18px;
  font: 600 12px/1 var(--sans);
  letter-spacing: 1.5px;
  text-transform: uppercase;
  color: #8a5a00;
  background: #fbe8c2;
  border-radius: 999px;
  padding: 8px 14px;
}
@media (prefers-color-scheme: dark) {
  .pillola { color: #ffd58a; background: rgba(224, 160, 48, 0.16); }
}

h1 {
  margin: 0;
  font: 700 clamp(34px, 5.6vw, 58px)/1.08 var(--serif);
  letter-spacing: -0.5px;
  text-wrap: balance;
}

.lede {
  margin: 18px 0 0;
  max-width: 60ch;
  color: var(--tenue);
  font-size: clamp(16px, 2.2vw, 19px);
}
.lede.piccolo { font-size: 16.5px; margin: 0 0 24px; }

.azioni {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin: 28px 0 12px;
}

.btn {
  display: inline-block;
  min-height: 48px;
  padding: 13px 24px;
  border-radius: 12px;
  border: 1.5px solid var(--inchiostro);
  color: var(--inchiostro);
  background: transparent;
  font: 700 15px/1.4 var(--sans);
  text-decoration: none;
}
.btn:hover, .btn:focus { background: var(--carta-2); }
.btn.primario {
  background: var(--inchiostro);
  color: #fff;
  box-shadow: 0 12px 28px -12px rgba(63, 60, 150, 0.8);
}
.btn.primario:hover, .btn.primario:focus { background: var(--inchiostro-2); }
@media (prefers-color-scheme: dark) {
  .btn.primario { color: #16152a; }
}
.btn.dona {
  border-color: var(--scintilla);
  color: #8a5a00;
  background: #fbe8c2;
}
@media (prefers-color-scheme: dark) {
  .btn.dona { color: #ffd58a; background: rgba(224, 160, 48, 0.14); }
}

.nota { color: var(--tenue); font-size: 14px; margin: 6px 0 0; }

/* ------------------------------------------------------ l'app in miniatura */
.telefono {
  justify-self: center;
  width: min(300px, 78vw);
  aspect-ratio: 9 / 18.5;
  border-radius: 40px;
  padding: 11px;
  background: #1b1a24;
  box-shadow: var(--ombra), inset 0 0 0 2px #34323f;
}

/* Lo schermo resta chiaro anche in tema scuro: e' la fotografia dell'app. */
.schermo {
  height: 100%;
  border-radius: 30px;
  background: #fbf7ef;
  color: #23212e;
  overflow: hidden;
  padding: 20px 16px;
  display: flex;
  flex-direction: column;
  gap: 14px;
  font-size: 12px;
  line-height: 1.35;
}

.app-barra {
  display: flex;
  align-items: center;
  gap: 8px;
  font: 700 15px/1 var(--serif);
}
.app-barra .logo { width: 22px; height: 22px; border-radius: 6px; }

.libro-mini { display: flex; align-items: center; gap: 12px; }
.libro-mini strong { display: block; font: 700 15px/1.2 var(--serif); }
.libro-mini small { color: #5d5a6b; }

.cop {
  flex: 0 0 auto;
  position: relative;
  width: 40px;
  height: 55px;
  border-radius: 4px;
  background: linear-gradient(135deg, #4a47a8, #26245f);
  box-shadow: 2px 3px 7px rgba(0, 0, 0, 0.25);
}
.cop::before {
  content: "";
  position: absolute;
  inset-block: 0;
  inset-inline-start: 4px;
  width: 2px;
  background: rgba(255, 255, 255, 0.25);
}
.cop::after {
  content: "";
  position: absolute;
  right: 6px;
  bottom: 6px;
  width: 8px;
  height: 8px;
  background: #f0b040;
  clip-path: polygon(50% 0, 62% 38%, 100% 50%, 62% 62%, 50% 100%, 38% 62%, 0 50%, 38% 38%);
}

.cursore {
  display: grid;
  gap: 8px;
  background: #fff;
  border: 1px solid rgba(35, 33, 46, 0.1);
  border-radius: 14px;
  padding: 12px;
}
.traccia {
  position: relative;
  height: 6px;
  border-radius: 3px;
  background: #e3ddd0;
}
.riempito {
  position: absolute;
  inset-block: 0;
  inset-inline-start: 0;
  width: 50%;
  border-radius: 3px;
  background: #3f3c96;
}
.pomello {
  position: absolute;
  top: 50%;
  inset-inline-start: 50%;
  width: 16px;
  height: 16px;
  margin: -8px 0 0 -8px;
  border-radius: 50%;
  background: #3f3c96;
  box-shadow: 0 0 0 5px rgba(63, 60, 150, 0.18);
}
.chip {
  justify-self: start;
  font-weight: 700;
  color: #3f3c96;
  background: #e6e5f7;
  border-radius: 999px;
  padding: 4px 10px;
}

.pagina {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 10px;
  background: #fff;
  border-radius: 14px;
  padding: 14px;
  box-shadow: 0 10px 24px -14px rgba(0, 0, 0, 0.3);
}
.pagina-titolo { font: 700 15px/1.3 var(--serif); }
.righe { display: grid; gap: 9px; }
.righe i {
  display: block;
  height: 7px;
  border-radius: 4px;
  background: #e6e1d6;
  transform-origin: left center;
  animation: scrivi 7s ease-out infinite;
}
.righe i.evid { background: linear-gradient(90deg, #f3d38b, #e6e1d6); }
.righe i.corta { width: 58%; }
.righe i:nth-child(2) { animation-delay: 0.5s; }
.righe i:nth-child(3) { animation-delay: 1s; }
.righe i:nth-child(4) { animation-delay: 1.5s; }
.righe i:nth-child(5) { animation-delay: 2s; }
.righe i:nth-child(6) { animation-delay: 2.5s; }
[dir="rtl"] .righe i { transform-origin: right center; }

/* Il testo arriva una riga alla volta, come nell'app mentre Claude scrive. */
@keyframes scrivi {
  0% { transform: scaleX(0); }
  12%, 88% { transform: scaleX(1); }
  100% { transform: scaleX(1); opacity: 0; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .righe i { animation: none; }
}

/* -------------------------------------------------------------- riquadri */
.riquadro {
  max-width: 1000px;
  margin: 0 auto;
  padding: clamp(34px, 6vw, 64px) clamp(16px, 4vw, 40px);
  border-top: 1px solid var(--bordo);
}
.riquadro h2 {
  margin: 0 0 22px;
  font: 700 clamp(24px, 3.6vw, 34px)/1.2 var(--serif);
  text-wrap: balance;
}
.riquadro h2 + .lede { margin-top: -8px; }

.passi {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 16px;
}
.passi li {
  display: flex;
  gap: 14px;
  align-items: flex-start;
  background: var(--foglio);
  border: 1px solid var(--bordo);
  border-radius: 16px;
  padding: 18px;
}
.passi span {
  flex: 0 0 34px;
  height: 34px;
  display: grid;
  place-items: center;
  border-radius: 50%;
  background: var(--inchiostro);
  color: #fff;
  font: 700 15px/1 var(--sans);
}
@media (prefers-color-scheme: dark) {
  .passi span { color: #16152a; }
}
.passi h3, .schede h3 { margin: 0 0 6px; font: 700 18px/1.3 var(--serif); }
.passi p, .schede p { margin: 0; color: var(--tenue); font-size: 15.5px; }

/* --------------------------------------------- stesso argomento, 5 livelli */
.demo {
  position: relative;
  background: var(--foglio);
  border: 1px solid var(--bordo);
  border-radius: 20px;
  padding: clamp(18px, 3.5vw, 32px);
  box-shadow: var(--ombra);
}

.scala {
  position: relative;
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  margin: 4px 0 26px;
}
.scala::before,
.scala::after {
  content: "";
  position: absolute;
  top: 18px;
  height: 4px;
  border-radius: 2px;
  inset-inline-start: 10%;
}
.scala::before { width: 80%; background: var(--bordo); }
.scala::after { width: 0; background: var(--inchiostro); transition: width 0.25s ease; }

.scala label {
  position: relative;
  z-index: 1;
  display: grid;
  justify-items: center;
  gap: 6px;
  cursor: pointer;
  text-align: center;
  font-size: 13.5px;
  line-height: 1.25;
  color: var(--tenue);
}
.scala b {
  width: 40px;
  height: 40px;
  display: grid;
  place-items: center;
  border-radius: 50%;
  background: var(--foglio);
  border: 2px solid var(--bordo);
  font: 700 16px/1 var(--sans);
  color: var(--tenue);
  transition: background 0.2s ease, color 0.2s ease, border-color 0.2s ease;
}
.scala label:hover b { border-color: var(--inchiostro); }

#lv2:checked ~ .scala::after { width: 20%; }
#lv3:checked ~ .scala::after { width: 40%; }
#lv4:checked ~ .scala::after { width: 60%; }
#lv5:checked ~ .scala::after { width: 80%; }

#lv1:checked ~ .scala label[for="lv1"] b,
#lv2:checked ~ .scala label[for="lv2"] b,
#lv3:checked ~ .scala label[for="lv3"] b,
#lv4:checked ~ .scala label[for="lv4"] b,
#lv5:checked ~ .scala label[for="lv5"] b {
  background: var(--inchiostro);
  border-color: var(--inchiostro);
  color: #fff;
  box-shadow: 0 0 0 6px rgba(63, 60, 150, 0.16);
}
@media (prefers-color-scheme: dark) {
  #lv1:checked ~ .scala label[for="lv1"] b,
  #lv2:checked ~ .scala label[for="lv2"] b,
  #lv3:checked ~ .scala label[for="lv3"] b,
  #lv4:checked ~ .scala label[for="lv4"] b,
  #lv5:checked ~ .scala label[for="lv5"] b { color: #16152a; }
}

#lv1:checked ~ .scala label[for="lv1"],
#lv2:checked ~ .scala label[for="lv2"],
#lv3:checked ~ .scala label[for="lv3"],
#lv4:checked ~ .scala label[for="lv4"],
#lv5:checked ~ .scala label[for="lv5"] { color: var(--testo); font-weight: 700; }

#lv1:focus-visible ~ .scala label[for="lv1"] b,
#lv2:focus-visible ~ .scala label[for="lv2"] b,
#lv3:focus-visible ~ .scala label[for="lv3"] b,
#lv4:focus-visible ~ .scala label[for="lv4"] b,
#lv5:focus-visible ~ .scala label[for="lv5"] b {
  outline: 3px solid var(--scintilla);
  outline-offset: 3px;
}

.demo-domanda {
  margin: 0 0 10px;
  font: 700 20px/1.3 var(--serif);
}
.demo-testi p {
  display: none;
  margin: 0;
  font: 18px/1.72 var(--serif);
}
#lv1:checked ~ .demo-testi .d1,
#lv2:checked ~ .demo-testi .d2,
#lv3:checked ~ .demo-testi .d3,
#lv4:checked ~ .demo-testi .d4,
#lv5:checked ~ .demo-testi .d5 { display: block; }

/* ---------------------------------------------------------------- schede */
.schede {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 16px;
}
.schede article {
  background: var(--foglio);
  border: 1px solid var(--bordo);
  border-radius: 16px;
  padding: 20px;
}

.spunte { margin: 0; padding: 0; list-style: none; display: grid; gap: 12px; }
.spunte li {
  position: relative;
  padding-inline-start: 28px;
  color: var(--tenue);
}
.spunte li::before {
  content: "";
  position: absolute;
  inset-inline-start: 2px;
  top: 7px;
  width: 13px;
  height: 13px;
  background: var(--scintilla);
  clip-path: polygon(50% 0, 62% 38%, 100% 50%, 62% 62%, 50% 100%, 38% 62%, 0 50%, 38% 38%);
}

.sostieni { text-align: center; }
.sostieni .lede { margin-inline: auto; }
.sostieni .azioni { justify-content: center; }

#faq details {
  border-bottom: 1px solid var(--bordo);
  padding: 16px 0;
}
#faq summary {
  cursor: pointer;
  font: 700 17px/1.5 var(--serif);
}
#faq p { margin: 10px 0 0; color: var(--tenue); }

/* ------------------------------------------------------------------ piede */
.piede {
  border-top: 1px solid var(--bordo);
  padding: 32px clamp(16px, 4vw, 40px) 46px;
  text-align: center;
  color: var(--tenue);
}
.piede p { margin: 0 0 8px; font-size: 15px; }
.piede .minuto { font-size: 13px; }

.vuoto {
  min-height: 80vh;
  display: grid;
  place-content: center;
  justify-items: center;
  text-align: center;
  padding: 24px;
}
.vuoto h1 { font-size: 72px; }

::selection { background: rgba(224, 160, 48, 0.35); }

:focus-visible {
  outline: 3px solid var(--scintilla);
  outline-offset: 3px;
}

@media (max-width: 820px) {
  .eroe { grid-template-columns: 1fr; text-align: center; }
  .eroe .lede { margin-inline: auto; }
  .azioni { justify-content: center; }
  .scala label span { font-size: 11.5px; }
}