/* Quaderno a quadretti: carta, griglia azzurra, inchiostro blu, margine rosso */
:root {
  --carta: #FBFBF7;
  --griglia: #DCE7F2;
  --inchiostro: #1F3A93;
  --inchiostro-chiaro: #E8EDF8;
  --matita: #26272B;
  --grigio: #5B5E66;
  --margine: #D64545;
  --evidenziatore: #FFE45C;
  --ok: #1E7B4A;

  --font-testo: "Atkinson Hyperlegible", system-ui, sans-serif;
  --font-mano: "Kalam", "Comic Neue", cursive;

  --quadretto: 20px;
  --colonna-margine: 132px;
  --larghezza: 760px;
}

* { box-sizing: border-box; }
[hidden] { display: none !important; }
html { scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }

body {
  margin: 0;
  color: var(--matita);
  background-color: var(--carta);
  background-image:
    linear-gradient(var(--griglia) 1px, transparent 1px),
    linear-gradient(90deg, var(--griglia) 1px, transparent 1px);
  background-size: var(--quadretto) var(--quadretto);
  font-family: var(--font-testo);
  font-size: 1.125rem;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

/* linea rossa del margine */
body::before {
  content: "";
  position: fixed;
  top: 0; bottom: 0;
  left: var(--colonna-margine);
  width: 2px;
  background: var(--margine);
  opacity: .55;
  z-index: 0;
  pointer-events: none;
}

a { color: var(--inchiostro); text-underline-offset: 3px; }
a:hover { text-decoration-thickness: 2px; }
:focus-visible { outline: 3px solid var(--inchiostro); outline-offset: 3px; border-radius: 4px; }

.pagina {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: var(--colonna-margine) minmax(0, 1fr);
}
.pagina > * { grid-column: 2; }
.contenuto { padding: 0 32px 0 40px; max-width: 1080px; }

/* ---------- intestazione ---------- */
.testata {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px 28px;
  padding: 22px 32px 22px 40px;
  max-width: 1100px;
}
.firma {
  font-family: var(--font-mano);
  font-size: 1.6rem;
  color: var(--inchiostro);
  text-decoration: none;
  line-height: 1.1;
}
.firma small { display: block; font-family: var(--font-testo); font-size: .85rem; color: var(--grigio); }
.menu { display: flex; flex-wrap: wrap; gap: 6px 22px; list-style: none; margin: 0; padding: 0; font-size: 1rem; }
.menu a { color: var(--matita); text-decoration: none; }
.menu a:hover, .menu a[aria-current="page"] { color: var(--inchiostro); text-decoration: underline; }
.menu .area-link { color: var(--inchiostro); font-weight: 700; }

/* ---------- tipografia ---------- */
h1, h2, h3 { line-height: 1.15; color: var(--matita); }
h1 { font-size: clamp(2.4rem, 5.2vw, 4.2rem); font-weight: 700; letter-spacing: -.02em; margin: 0 0 20px; }
h2 { font-size: clamp(1.7rem, 3.4vw, 2.3rem); font-weight: 700; letter-spacing: -.01em; margin: 0 0 18px; }
h3 { font-size: 1.25rem; margin: 0 0 8px; }
p { margin: 0 0 16px; max-width: 64ch; }
.sottotitolo { font-size: 1.3rem; color: var(--grigio); max-width: 34ch; }

/* annotazione a mano nella colonna del margine */
.sezione { position: relative; padding: 64px 0; }
.nota {
  font-family: var(--font-mano);
  color: var(--margine);
  font-size: 1.15rem;
  line-height: 1.2;
  position: absolute;
  left: calc(-1 * var(--colonna-margine) - 40px + 14px);
  width: calc(var(--colonna-margine) - 26px);
  top: 72px;
  transform: rotate(-4deg);
  text-align: right;
}

/* ---------- pulsanti ---------- */
.azioni { display: flex; flex-wrap: wrap; gap: 14px; margin-top: 28px; }
.btn {
  display: inline-flex; align-items: center; gap: 8px;
  font: 700 1.05rem/1 var(--font-testo);
  padding: 15px 22px;
  border-radius: 6px;
  border: 2px solid var(--inchiostro);
  background: var(--inchiostro);
  color: var(--carta);
  text-decoration: none;
  cursor: pointer;
}
.btn:hover { background: #172C72; border-color: #172C72; }
.btn.secondario { background: var(--carta); color: var(--inchiostro); }
.btn.secondario:hover { background: var(--inchiostro-chiaro); }
.btn.piccolo { padding: 9px 14px; font-size: .95rem; }
.btn.pericolo { background: var(--carta); color: var(--margine); border-color: var(--margine); }
.btn:disabled { opacity: .5; cursor: not-allowed; }

/* ---------- hero ---------- */
.hero { display: grid; grid-template-columns: minmax(0, 1.15fr) minmax(0, 1fr); gap: 48px; align-items: center; padding: 40px 0 56px; }
.lavagna { width: 100%; height: auto; overflow: visible; }
.lavagna .assi { stroke: var(--matita); stroke-width: 2; }
.lavagna .curva { fill: none; stroke: var(--inchiostro); stroke-width: 3.5; stroke-linecap: round; stroke-dasharray: 900; stroke-dashoffset: 900; animation: traccia 2.2s .3s ease-out forwards; }
.lavagna .punto { fill: var(--margine); opacity: 0; animation: compari .4s 2.3s forwards; }
.lavagna .scritta { font-family: var(--font-mano); fill: var(--inchiostro); font-size: 22px; opacity: 0; animation: compari .5s 2.5s forwards; }
.lavagna .scritta.rossa { fill: var(--margine); font-size: 19px; }
.lavagna .freccia { fill: none; stroke: var(--margine); stroke-width: 2; opacity: 0; animation: compari .5s 2.5s forwards; }
@keyframes traccia { to { stroke-dashoffset: 0; } }
@keyframes compari { to { opacity: 1; } }
@media (prefers-reduced-motion: reduce) {
  .lavagna .curva { animation: none; stroke-dashoffset: 0; }
  .lavagna .punto, .lavagna .scritta, .lavagna .freccia { animation: none; opacity: 1; }
}

/* ---------- indice delle materie (stile indice di quaderno) ---------- */
.indice { list-style: none; margin: 8px 0 0; padding: 0; max-width: 640px; }
.indice li { display: flex; align-items: baseline; gap: 10px; padding: 8px 0; font-size: 1.15rem; }
.indice li::after { content: ""; order: 2; flex: 1; border-bottom: 2px dotted #9AA6BF; transform: translateY(-5px); }
.indice .voce { order: 1; font-weight: 700; }
.indice .livello { order: 3; color: var(--grigio); font-size: 1rem; white-space: nowrap; }

/* ---------- passi ---------- */
.passi { list-style: none; counter-reset: passo; margin: 0; padding: 0; display: grid; gap: 22px; max-width: 640px; }
.passi li { counter-increment: passo; display: grid; grid-template-columns: 52px 1fr; gap: 14px; align-items: start; }
.passi li::before {
  content: counter(passo);
  font-family: var(--font-mano);
  font-size: 1.7rem; color: var(--inchiostro);
  width: 46px; height: 46px; border: 2px solid var(--inchiostro); border-radius: 50%;
  display: grid; place-items: center; line-height: 1;
}
.passi p { margin: 0; }
mark { background: linear-gradient(100deg, transparent 2%, var(--evidenziatore) 4%, var(--evidenziatore) 96%, transparent 98%); color: inherit; padding: 0 3px; }

/* ---------- tabelle ---------- */
.tabella { width: 100%; max-width: 560px; border-collapse: collapse; background: var(--carta); font-size: 1.05rem; }
.tabella th, .tabella td { text-align: left; padding: 12px 14px; border-bottom: 1px solid #C9D3E3; }
.tabella th { font-size: .95rem; color: var(--grigio); font-weight: 400; }
.tabella td:last-child, .tabella th:last-child { text-align: right; white-space: nowrap; }
.tabella .prezzo { font-weight: 700; color: var(--inchiostro); }

/* ---------- due colonne ---------- */
.colonne { display: grid; grid-template-columns: 1fr 1fr; gap: 28px 40px; max-width: 760px; }

/* ---------- FAQ ---------- */
.faq details { border-bottom: 1px solid #C9D3E3; padding: 14px 0; max-width: 680px; background: var(--carta); }
.faq summary { cursor: pointer; font-weight: 700; list-style: none; display: flex; justify-content: space-between; gap: 16px; }
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after { content: "+"; font-family: var(--font-mano); font-size: 1.5rem; color: var(--inchiostro); line-height: 1; }
.faq details[open] summary::after { content: "−"; }
.faq details p { margin: 10px 0 0; }

/* ---------- foglio (riquadro su carta) ---------- */
.foglio {
  background: var(--carta);
  border: 1.5px solid #B9C5DA;
  border-radius: 8px;
  padding: 24px;
  margin-bottom: 24px;
}
.foglio h2 { font-size: 1.45rem; }

/* ---------- piè di pagina ---------- */
.piede { padding: 40px 32px 56px 40px; color: var(--grigio); font-size: .95rem; }
.piede a { color: var(--grigio); }
.piede ul { list-style: none; padding: 0; margin: 10px 0 0; display: flex; flex-wrap: wrap; gap: 6px 20px; }

/* ---------- area riservata ---------- */
.saluto { font-family: var(--font-mano); color: var(--inchiostro); font-size: 1.4rem; margin: 0 0 4px; }
.file-lista { list-style: none; padding: 0; margin: 0; }
.file-lista li { display: flex; flex-wrap: wrap; align-items: center; gap: 8px 14px; padding: 12px 0; border-bottom: 1px solid #DDE3EE; }
.file-lista .nome { flex: 1 1 220px; font-weight: 700; word-break: break-word; }
.file-lista .info { color: var(--grigio); font-size: .9rem; flex-basis: 100%; order: 3; margin-top: -6px; }
.vuoto { color: var(--grigio); font-style: italic; }
.zona-carica {
  display: grid; place-items: center; text-align: center; gap: 6px;
  border: 2px dashed #8EA0C4; border-radius: 8px;
  padding: 28px 16px; cursor: pointer; background: #F6F8FD;
}
.zona-carica.sopra { border-color: var(--inchiostro); background: var(--inchiostro-chiaro); }
.zona-carica input { position: absolute; width: 1px; height: 1px; opacity: 0; }
.stato { min-height: 1.5em; margin-top: 10px; font-size: .98rem; }
.stato.errore { color: var(--margine); }
.stato.ok { color: var(--ok); }
.chip { display: inline-block; font-size: .85rem; padding: 2px 9px; border-radius: 999px; background: var(--inchiostro-chiaro); color: var(--inchiostro); }
.copia-riga { display: flex; flex-wrap: wrap; align-items: center; gap: 10px; margin: 6px 0 14px; }
.copia-riga code { font-size: 1.05rem; background: #F1F3F8; padding: 6px 10px; border-radius: 6px; word-break: break-all; }
label { font-weight: 700; display: block; margin-bottom: 6px; }
select, input[type="email"], input[type="text"] { font: inherit; padding: 10px 12px; border: 1.5px solid #9AA6BF; border-radius: 6px; background: #fff; width: 100%; max-width: 420px; }

/* ---------- responsive ---------- */
@media (max-width: 860px) {
  :root { --colonna-margine: 18px; }
  .contenuto { padding: 0 20px 0 26px; }
  .testata { padding: 18px 20px 14px 26px; }
  .piede { padding: 32px 20px 48px 26px; }
  .hero { grid-template-columns: 1fr; padding-top: 16px; }
  .lavagna { max-width: 420px; }
  .nota { position: static; transform: rotate(-2deg); text-align: left; width: auto; margin-bottom: 8px; display: block; }
  .colonne { grid-template-columns: 1fr; }
  .sezione { padding: 44px 0; }
}