/* =========================================================================
   1977-1987. Quando il Computer divenne Personal
   Design: carta color ecru come la copertina del libro, inchiostro quasi
   nero, un verde fosforo da monitor a fosfori verdi per link e stati attivi,
   e un rosso-ruggine da timbro per l'unico elemento "di segnalazione"
   (il timbro NON PI\u00d9 IN VENDITA e le etichette NUOVO nell'indice).
   ========================================================================= */

:root {
  --paper: #F3EEE1;
  --paper-deep: #EAE1C7;
  --ink: #1C1A15;
  --ink-soft: #5B5646;
  --rule: #C9BEA0;
  --phosphor: #2E6E4E;
  --phosphor-bright: #3F8C64;
  --stamp: #B7472A;

  --display: "Fraunces", Georgia, serif;
  --body: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --mono: "IBM Plex Mono", "Courier New", monospace;

  --measure: 68ch;
  --wrap: 1120px;
}

* { box-sizing: border-box; }

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

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

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

a { color: inherit; }

.visually-hidden {
  position: absolute;
  width: 1px; height: 1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
}

.skip-link {
  position: absolute;
  left: -999px;
  top: 0;
  background: var(--ink);
  color: var(--paper);
  padding: .6em 1em;
  z-index: 100;
}
.skip-link:focus {
  left: 1em;
  top: 1em;
}

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

.wrap {
  max-width: var(--wrap);
  margin: 0 auto;
  padding: 0 24px;
}

h1, h2, h3 { font-family: var(--display); font-weight: 600; margin: 0; }

/* ---------------------------------------------------------------------
   Header / navigazione "boot menu"
   --------------------------------------------------------------------- */

.site-header {
  border-bottom: 1px solid var(--rule);
  background: var(--paper);
  position: sticky;
  top: 0;
  z-index: 20;
}

.site-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}

.brand {
  display: flex;
  align-items: baseline;
  gap: .4em;
  text-decoration: none;
  font-family: var(--mono);
  font-weight: 600;
  letter-spacing: .02em;
  color: var(--ink);
}
.brand__mark { color: var(--phosphor); }
.brand__years { font-size: 1rem; }

.site-nav {
  display: flex;
  gap: 2em;
  font-family: var(--mono);
  font-size: .85rem;
  letter-spacing: .04em;
  text-transform: uppercase;
}

.site-nav a {
  text-decoration: none;
  color: var(--ink-soft);
  padding: .3em 0;
  border-bottom: 2px solid transparent;
  display: inline-flex;
  align-items: center;
}

.site-nav a:hover { color: var(--ink); }

.site-nav a.is-active {
  color: var(--phosphor);
  border-bottom-color: var(--phosphor);
}

.cursor {
  margin-left: .35em;
  color: var(--phosphor);
  animation: blink 1.1s steps(1) infinite;
}

@media (prefers-reduced-motion: reduce) {
  .cursor { animation: none; }
}

.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 40px;
  height: 40px;
  background: none;
  border: 1px solid var(--rule);
  border-radius: 6px;
  cursor: pointer;
}
.nav-toggle span {
  display: block;
  height: 2px;
  margin: 0 8px;
  background: var(--ink);
}

@media (max-width: 720px) {
  .nav-toggle { display: flex; }
  .site-nav {
    display: none;
    flex-direction: column;
    gap: 0;
    position: absolute;
    top: 64px;
    left: 0;
    right: 0;
    background: var(--paper);
    border-bottom: 1px solid var(--rule);
    padding: 8px 24px 16px;
  }
  .site-nav.is-open { display: flex; }
  .site-nav a { padding: .6em 0; }
}

/* ---------------------------------------------------------------------
   Hero (home)
   --------------------------------------------------------------------- */

.hero {
  padding: 56px 0 48px;
}

.hero__grid {
  display: grid;
  grid-template-columns: minmax(260px, 380px) 1fr;
  gap: 56px;
  align-items: start;
}

@media (max-width: 860px) {
  .hero__grid { grid-template-columns: 1fr; gap: 32px; }
}

.hero__cover {
  position: relative;
}

.hero__cover img {
  width: 100%;
  border: 1px solid var(--rule);
  box-shadow: 10px 10px 0 var(--paper-deep);
}

/* Il timbro "non pi\u00f9 in vendita": l'elemento distintivo della pagina,
   pensato come un vero timbro d'archivio sopra la copertina del libro. */
.stamp {
  position: absolute;
  top: -18px;
  right: -14px;
  transform: rotate(-9deg);
  border: 3px solid var(--stamp);
  color: var(--stamp);
  font-family: var(--mono);
  font-weight: 600;
  font-size: .78rem;
  letter-spacing: .06em;
  text-transform: uppercase;
  text-align: center;
  padding: 10px 12px;
  border-radius: 6px;
  background: rgba(243, 238, 225, 0.88);
  mix-blend-mode: multiply;
  line-height: 1.3;
}

@media (max-width: 480px) {
  .stamp { font-size: .68rem; top: -12px; right: -8px; padding: 8px 10px; }
}

.hero__kicker {
  font-family: var(--mono);
  text-transform: uppercase;
  letter-spacing: .08em;
  font-size: .8rem;
  color: var(--phosphor);
  margin-bottom: .8em;
}

.hero__title {
  font-size: clamp(1.8rem, 3.4vw, 2.6rem);
  line-height: 1.15;
  margin-bottom: .55em;
}

.hero__intro {
  font-size: 1.08rem;
  color: var(--ink);
  margin-bottom: 1em;
}

.hero__welcome {
  color: var(--ink-soft);
  max-width: var(--measure);
}

/* ---------------------------------------------------------------------
   Rule / divider stile "carta perforata"
   --------------------------------------------------------------------- */

.perforated {
  border: none;
  border-top: 2px dashed var(--rule);
  margin: 48px 0;
}

/* ---------------------------------------------------------------------
   Quote (prefazione teaser in home)
   --------------------------------------------------------------------- */

.quote-block {
  max-width: var(--wrap);
  margin: 0 auto;
  padding: 0 24px;
}

.quote-block__inner {
  border-left: 3px solid var(--phosphor);
  padding: 4px 0 4px 28px;
}

.quote-block__lead {
  font-family: var(--mono);
  font-size: .8rem;
  text-transform: uppercase;
  letter-spacing: .06em;
  color: var(--phosphor);
  margin-bottom: .8em;
}

.quote-block blockquote {
  margin: 0 0 .7em;
  font-family: var(--display);
  font-style: italic;
  font-weight: 500;
  font-size: clamp(1.2rem, 2.4vw, 1.55rem);
  line-height: 1.4;
  max-width: var(--measure);
}

.quote-block cite {
  font-style: normal;
  font-family: var(--mono);
  font-size: .85rem;
  color: var(--ink-soft);
}
.quote-block cite strong { color: var(--ink); }

/* ---------------------------------------------------------------------
   Testimonianze (recensioni di terzi)
   --------------------------------------------------------------------- */

.testimonials { padding: 8px 0 8px; }

.testimonials__title {
  font-size: clamp(1.4rem, 2.4vw, 1.9rem);
  margin-bottom: 1.1em;
}

.testimonials-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
}

@media (max-width: 720px) {
  .testimonials-grid { grid-template-columns: 1fr; }
}

.testimonial-card {
  background: var(--paper-deep);
  border: 1px solid var(--rule);
  padding: 22px 24px;
}

.testimonial-card blockquote {
  margin: 0 0 .8em;
  font-family: var(--display);
  font-style: italic;
  font-weight: 500;
  font-size: 1rem;
  line-height: 1.55;
}

.testimonial-card cite {
  font-style: normal;
  font-family: var(--mono);
  font-size: .8rem;
  color: var(--ink-soft);
  display: block;
}

.testimonial-card cite strong {
  display: block;
  color: var(--ink);
  font-size: .88rem;
  margin-bottom: .2em;
}

/* ---------------------------------------------------------------------
   Sezioni "cosa racconta il libro"
   --------------------------------------------------------------------- */

.section-block { padding: 8px 0 48px; }

.section-block__title {
  font-size: clamp(1.4rem, 2.4vw, 1.9rem);
  margin-bottom: .5em;
}

.section-block__intro {
  color: var(--ink-soft);
  max-width: var(--measure);
  margin-bottom: 2em;
}

.feature-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 28px 40px;
}

@media (max-width: 720px) {
  .feature-grid { grid-template-columns: 1fr; }
}

.feature-grid__item {
  border-top: 1px solid var(--rule);
  padding-top: 14px;
}

.feature-grid__lead {
  font-family: var(--display);
  font-weight: 600;
  font-size: 1.08rem;
  margin-bottom: .35em;
}

.feature-grid__text { color: var(--ink-soft); }

/* ---------------------------------------------------------------------
   Statistiche - "punch card"
   --------------------------------------------------------------------- */

.stats { padding: 8px 0 56px; }

.stats__title {
  font-size: clamp(1.4rem, 2.4vw, 1.9rem);
  margin-bottom: 1.1em;
}

.stats__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

@media (max-width: 720px) {
  .stats__grid { grid-template-columns: 1fr; }
}

.punch-card {
  background: var(--paper-deep);
  border: 1px solid var(--rule);
  padding: 22px 20px;
  position: relative;
  clip-path: polygon(0 0, calc(100% - 16px) 0, 100% 16px, 100% 100%, 0 100%);
}

.punch-card__number {
  font-family: var(--mono);
  font-weight: 600;
  font-size: 2.2rem;
  color: var(--phosphor);
  line-height: 1;
}

.punch-card__label {
  font-family: var(--display);
  font-weight: 600;
  margin-top: .3em;
}

.punch-card__text {
  color: var(--ink-soft);
  font-size: .92rem;
  margin-top: .35em;
}

/* ---------------------------------------------------------------------
   Chiusura home
   --------------------------------------------------------------------- */

.closing { padding: 8px 0 64px; max-width: var(--measure); }
.closing__title { font-size: clamp(1.4rem, 2.4vw, 1.9rem); margin-bottom: .5em; }
.closing__text { color: var(--ink-soft); }

/* ---------------------------------------------------------------------
   Pagine di lettura (premessa) - colonna stretta, capolettera
   --------------------------------------------------------------------- */

.reading {
  padding: 56px 0 72px;
}

.reading__col {
  max-width: var(--measure);
  margin: 0 auto;
}

.reading__kicker {
  font-family: var(--mono);
  text-transform: uppercase;
  letter-spacing: .08em;
  font-size: .8rem;
  color: var(--phosphor);
  margin-bottom: .6em;
  text-align: center;
}

.reading__title {
  font-size: clamp(1.8rem, 3.4vw, 2.4rem);
  text-align: center;
  margin-bottom: 1.4em;
}

.reading__col p {
  margin: 0 0 1.15em;
}

.reading__col p:first-of-type::first-letter {
  font-family: var(--display);
  font-weight: 600;
  font-size: 3.4em;
  float: left;
  line-height: .82;
  padding-right: .1em;
  color: var(--phosphor);
}

.reading__signature {
  margin-top: 2em;
  font-family: var(--display);
  font-style: italic;
  text-align: right;
}

.reading__bio-box {
  margin-top: 3em;
  padding-top: 2em;
  border-top: 2px dashed var(--rule);
}

.reading__bio-box h2 {
  font-size: 1.1rem;
  font-family: var(--mono);
  text-transform: uppercase;
  letter-spacing: .05em;
  color: var(--phosphor);
  margin-bottom: .7em;
}

.reading__bio-box p { color: var(--ink-soft); }

/* ---------------------------------------------------------------------
   Autori
   --------------------------------------------------------------------- */

.authors-hero { padding: 56px 0 16px; }
.authors-hero__kicker {
  font-family: var(--mono);
  text-transform: uppercase;
  letter-spacing: .08em;
  font-size: .8rem;
  color: var(--phosphor);
  margin-bottom: .6em;
}
.authors-hero__title { font-size: clamp(1.8rem, 3.4vw, 2.4rem); margin-bottom: .4em; }
.authors-hero__text { color: var(--ink-soft); max-width: var(--measure); }

.author-featured {
  margin: 32px 0 8px;
  padding: 28px 28px 30px;
  background: var(--paper-deep);
  border: 1px solid var(--rule);
}

.author-featured__name {
  font-size: 1.5rem;
  margin-bottom: .15em;
}

.author-featured__role {
  font-family: var(--mono);
  font-size: .8rem;
  text-transform: uppercase;
  letter-spacing: .05em;
  color: var(--phosphor);
  margin-bottom: .9em;
}

.author-featured__bio { color: var(--ink-soft); max-width: 76ch; }

.authors-grid {
  padding: 40px 0 72px;
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 22px;
}

@media (max-width: 760px) {
  .authors-grid { grid-template-columns: 1fr; }
}

.author-card {
  border: 1px solid var(--rule);
  padding: 20px 22px;
  background: var(--paper);
}

.author-card__name {
  font-family: var(--display);
  font-weight: 600;
  font-size: 1.08rem;
  margin-bottom: .5em;
}

.author-card__bio {
  color: var(--ink-soft);
  font-size: .93rem;
}

/* ---------------------------------------------------------------------
   Indice
   --------------------------------------------------------------------- */

.toc-hero { padding: 56px 0 8px; }
.toc-hero__kicker {
  font-family: var(--mono);
  text-transform: uppercase;
  letter-spacing: .08em;
  font-size: .8rem;
  color: var(--phosphor);
  margin-bottom: .6em;
}
.toc-hero__title { font-size: clamp(1.8rem, 3.4vw, 2.4rem); margin-bottom: .3em; }
.toc-hero__edizione { color: var(--ink-soft); font-family: var(--mono); font-size: .9rem; }

.toc { padding: 24px 0 24px; }

.toc-chapter {
  display: grid;
  grid-template-columns: 64px 1fr;
  gap: 18px;
  padding: 26px 0;
  border-top: 1px solid var(--rule);
}

.toc-chapter__number {
  font-family: var(--mono);
  font-weight: 600;
  font-size: 1.6rem;
  color: var(--phosphor);
  line-height: 1;
}

.toc-chapter__title {
  font-size: 1.2rem;
  margin-bottom: .6em;
}

.toc-chapter__list {
  list-style: none;
  margin: 0;
  padding: 0;
  columns: 2;
  column-gap: 32px;
}

@media (max-width: 640px) {
  .toc-chapter { grid-template-columns: 40px 1fr; gap: 12px; }
  .toc-chapter__list { columns: 1; }
}

.toc-chapter__list li {
  display: flex;
  align-items: baseline;
  gap: .5em;
  padding: .28em 0;
  font-size: .93rem;
  color: var(--ink-soft);
  break-inside: avoid;
}

.toc-badge {
  font-family: var(--mono);
  font-size: .62rem;
  font-weight: 600;
  letter-spacing: .04em;
  color: var(--stamp);
  border: 1px solid var(--stamp);
  border-radius: 3px;
  padding: 0 4px;
  white-space: nowrap;
  flex: none;
}

.toc-appendici {
  margin-top: 8px;
  padding: 30px 0 72px;
  border-top: 2px dashed var(--rule);
}

.toc-appendici__title {
  font-family: var(--mono);
  text-transform: uppercase;
  letter-spacing: .06em;
  font-size: .85rem;
  color: var(--phosphor);
  margin-bottom: 1em;
}

.toc-appendici__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: .5em;
}

.toc-appendici__list li {
  display: flex;
  gap: .8em;
  font-size: .98rem;
}

.toc-appendici__letter {
  font-family: var(--mono);
  color: var(--phosphor);
  font-weight: 600;
}

/* ---------------------------------------------------------------------
   Footer
   --------------------------------------------------------------------- */

.site-footer {
  border-top: 1px solid var(--rule);
  background: var(--paper-deep);
}

.site-footer__inner {
  padding: 32px 24px;
  text-align: center;
}

.site-footer__book {
  font-family: var(--display);
  font-weight: 600;
  margin-bottom: .2em;
}

.site-footer__meta {
  color: var(--ink-soft);
  font-size: .88rem;
  margin-bottom: .9em;
}

.site-footer__back {
  font-family: var(--mono);
  font-size: .85rem;
  color: var(--phosphor);
  text-decoration: none;
}
.site-footer__back:hover { text-decoration: underline; }

@keyframes blink {
  0%, 49% { opacity: 1; }
  50%, 100% { opacity: 0; }
}