/* =========================================================
   Vetrina progetti — foglio di stile
   Impianto: colonna "sorgente" (monospazio) a sinistra,
   colonna "pagina" (composta) a destra, separate da un filo.
   ========================================================= */

:root {
  --carta:      #eff0ea;
  --carta-2:    #e5e7dd;
  --inchiostro: #14171b;
  --grigio:     #6b7076;
  --matita:     #23439b;
  --filo:       #cfd2c8;

  --serif: "Newsreader", Georgia, "Times New Roman", serif;
  --sans:  "Instrument Sans", "Helvetica Neue", Arial, sans-serif;
  --mono:  "IBM Plex Mono", "Consolas", "SFMono-Regular", monospace;

  --misura: 1180px;
  --margine: 40px;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--carta);
  color: var(--inchiostro);
  font-family: var(--sans);
  font-size: 17px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

a { color: inherit; }

.salta {
  position: absolute;
  left: -9999px;
}
.salta:focus {
  left: 12px; top: 12px;
  z-index: 10;
  background: var(--inchiostro);
  color: var(--carta);
  padding: 10px 16px;
  font-family: var(--mono);
  font-size: 13px;
}

/* ---------- testata ---------- */

.testata {
  border-bottom: 1px solid var(--filo);
  position: sticky;
  top: 0;
  background: color-mix(in srgb, var(--carta) 92%, transparent);
  backdrop-filter: blur(6px);
  z-index: 5;
}

.testata__interno {
  max-width: var(--misura);
  margin: 0 auto;
  padding: 14px var(--margine);
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 20px;
}

.marchio {
  position: relative;
  display: inline-block;
  font-family: var(--mono);
  font-size: 13px;
  letter-spacing: 0.02em;
  color: inherit;
  text-decoration: none;
  padding-bottom: 2px;
  border-bottom: 1px solid var(--filo);
}
/* il filo blu scorre da sinistra sopra la sottolineatura di riposo */
.marchio::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: -1px;
  height: 1px;
  background: var(--matita);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.25s ease;
}
.marchio:hover::after,
.marchio:focus-visible::after { transform: scaleX(1); }

.marchio__barra { color: var(--matita); padding: 0 1px; }

.menu {
  display: flex;
  gap: 22px;
  font-family: var(--mono);
  font-size: 13px;
}
.menu a {
  text-decoration: none;
  color: var(--grigio);
  padding-bottom: 2px;
  border-bottom: 1px solid transparent;
}
.menu a:hover,
.menu a:focus-visible { color: var(--inchiostro); border-bottom-color: var(--matita); }

/* ---------- impianto a due colonne ---------- */

.lastra {
  max-width: var(--misura);
  margin: 0 auto;
  padding: 0 var(--margine);
  border-bottom: 1px solid var(--filo);
  scroll-margin-top: 64px;
}

.colonne {
  display: grid;
  grid-template-columns: 34% 1fr;
  align-items: start;
}

.colonna { padding: 56px 0; }

.colonna--sorgente { padding-right: 40px; }

.colonna--pagina {
  padding-left: 48px;
  border-left: 1px solid var(--filo);
  align-self: stretch;
}

/* ---------- etichette e materiale monospazio ---------- */

.etichetta {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--grigio);
  margin: 0 0 22px;
}

.codice {
  font-family: var(--mono);
  font-size: 13px;
  line-height: 1.85;
  color: var(--grigio);
  margin: 0;
  white-space: pre-wrap;
  word-break: break-word;
}
.codice--breve { margin-top: 18px; }

.cod-segno  { color: var(--matita); }
.cod-chiave { color: var(--inchiostro); }
.cod-meta   { color: #a9ada2; }

.cursore {
  display: inline-block;
  width: 7px;
  height: 1em;
  margin-left: 2px;
  vertical-align: -2px;
  background: var(--matita);
  animation: lampeggio 1.1s steps(1) infinite;
}
@keyframes lampeggio { 50% { opacity: 0; } }

.estensione {
  font-family: var(--mono);
  font-size: clamp(46px, 7vw, 74px);
  line-height: 1;
  letter-spacing: -0.04em;
  color: var(--inchiostro);
  margin: 0;
}

/* ---------- materiale composto ---------- */

.titolone {
  font-family: var(--serif);
  font-weight: 600;
  font-size: clamp(40px, 6.4vw, 68px);
  line-height: 1.02;
  letter-spacing: -0.02em;
  margin: 0 0 24px;
  text-wrap: balance;
}

.titolo {
  font-family: var(--serif);
  font-weight: 600;
  font-size: clamp(32px, 4.4vw, 48px);
  line-height: 1.05;
  letter-spacing: -0.02em;
  margin: 0 0 18px;
}
.titolo--centro { text-align: center; margin-bottom: 44px; }

.occhiello {
  font-size: 20px;
  line-height: 1.5;
  max-width: 34em;
  margin: 0 0 26px;
}

.testo {
  margin: 0 0 22px;
  max-width: 38em;
  color: #2a2e33;
}
.testo code {
  font-family: var(--mono);
  font-size: 0.88em;
  background: var(--carta-2);
  padding: 1px 5px;
}

.dati {
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--grigio);
  margin: 0 0 32px;
}

.elenco {
  list-style: none;
  margin: 0 0 26px;
  padding: 0;
  max-width: 38em;
}
.elenco li {
  position: relative;
  padding: 9px 0 9px 26px;
  border-top: 1px solid var(--filo);
  font-size: 16px;
}
.elenco li:last-child { border-bottom: 1px solid var(--filo); }
.elenco li::before {
  content: "\2014";
  position: absolute;
  left: 0;
  color: var(--matita);
}

.stack {
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--grigio);
  margin: 0 0 28px;
}

/* ---------- comandi ---------- */

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

.bottone {
  display: inline-block;
  font-family: var(--mono);
  font-size: 13px;
  text-decoration: none;
  padding: 11px 20px;
  background: var(--matita);
  color: var(--carta);
  border: 1px solid var(--matita);
  transition: background 0.18s ease, color 0.18s ease;
}
.bottone:hover,
.bottone:focus-visible { background: var(--inchiostro); border-color: var(--inchiostro); }

.bottone--vuoto {
  background: transparent;
  color: var(--inchiostro);
  border-color: var(--filo);
}
.bottone--vuoto:hover,
.bottone--vuoto:focus-visible { background: var(--inchiostro); color: var(--carta); }

:focus-visible { outline: 2px solid var(--matita); outline-offset: 3px; }

/* ---------- sezione template ---------- */

.lastra--template { padding-top: 64px; padding-bottom: 64px; text-align: center; }
.lastra--template .etichetta { margin-bottom: 14px; }

.griglia-template {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1px;
  background: var(--filo);
  border: 1px solid var(--filo);
  text-align: left;
}

.scheda {
  background: var(--carta);
  padding: 24px 22px 26px;
}
.scheda h3 {
  font-family: var(--mono);
  font-size: 14px;
  font-weight: 500;
  letter-spacing: 0.04em;
  margin: 20px 0 8px;
}
.scheda p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.5;
  color: var(--grigio);
}

/* paginette in miniatura */
.mini {
  background: #fbfbf7;
  border: 1px solid var(--filo);
  aspect-ratio: 3 / 4;
  padding: 14px 13px;
  display: flex;
  flex-direction: column;
  gap: 7px;
}
.riga {
  display: block;
  height: 3px;
  background: var(--filo);
  width: 100%;
}
.riga--corta { width: 52%; }
.riga--media { width: 76%; }
.riga--titolo { height: 7px; width: 64%; background: var(--inchiostro); margin-bottom: 6px; }
.blocco {
  display: block;
  height: 34px;
  background: var(--carta-2);
  border-left: 2px solid var(--matita);
  margin: 3px 0;
}
.passo { display: flex; align-items: center; gap: 8px; }
.pallino {
  width: 7px; height: 7px;
  border-radius: 50%;
  border: 1.5px solid var(--matita);
  flex: 0 0 auto;
}
.mini--appunti { padding-left: 26px; padding-right: 26px; }

/* ---------- piede ---------- */

.pieno {
  max-width: var(--misura);
  margin: 0 auto;
  padding: 28px var(--margine) 48px;
  display: flex;
  justify-content: space-between;
  gap: 18px;
  font-family: var(--mono);
  font-size: 12px;
  color: var(--grigio);
}
.pieno p { margin: 0; }
.pieno a { text-decoration: none; border-bottom: 1px solid var(--filo); }
.pieno a:hover { color: var(--inchiostro); border-bottom-color: var(--matita); }

/* ---------- composizione all'apertura ---------- */

.reso {
  opacity: 0;
  transform: translateY(8px);
}
body.composta .reso {
  opacity: 1;
  transform: none;
  transition: opacity 0.5s ease, transform 0.5s ease;
  transition-delay: calc(var(--i) * 90ms);
}

/* ---------- adattamento ---------- */

@media (max-width: 900px) {
  :root { --margine: 24px; }

  .colonne { grid-template-columns: 1fr; }
  .colonna { padding: 34px 0; }
  .colonna--sorgente { padding-right: 0; padding-bottom: 0; }
  .colonna--pagina {
    padding-left: 0;
    padding-top: 26px;
    border-left: 0;
    border-top: 1px solid var(--filo);
    margin-top: 26px;
  }
  .griglia-template { grid-template-columns: repeat(2, 1fr); }
  .pieno { flex-direction: column; gap: 6px; }
}

@media (max-width: 520px) {
  body { font-size: 16px; }
  .menu { gap: 14px; font-size: 12px; }
  .griglia-template { grid-template-columns: 1fr; }
  .mini { aspect-ratio: 4 / 3; }
  .azioni .bottone { flex: 1 1 100%; text-align: center; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .reso { opacity: 1; transform: none; }
  body.composta .reso { transition: none; }
  .marchio::after { transition: none; }
  .cursore { animation: none; }
}