/* =========================================================
   www.alessandrovidali.it
   Sistema visivo allineato a @vidali.educazionefinanziaria
   Palette: off-white #FAFAF7 · blu notte #1B2536 ·
            arancio bruciato #E27B47 · grigio #6B6F76
   Font: Fraunces (titoli) + Inter (corpo)
   ========================================================= */

:root {
  --text-xs: clamp(0.75rem, 0.7rem + 0.25vw, 0.875rem);
  --text-sm: clamp(0.875rem, 0.8rem + 0.35vw, 1rem);
  --text-base: clamp(1rem, 0.95rem + 0.25vw, 1.125rem);
  --text-lg: clamp(1.125rem, 1rem + 0.6vw, 1.375rem);
  --text-xl: clamp(1.5rem, 1.2rem + 1.25vw, 2.25rem);
  --text-2xl: clamp(2rem, 1.2rem + 2.4vw, 3.25rem);

  --space-1: 0.25rem; --space-2: 0.5rem; --space-3: 0.75rem; --space-4: 1rem;
  --space-5: 1.25rem; --space-6: 1.5rem; --space-8: 2rem; --space-10: 2.5rem;
  --space-12: 3rem; --space-16: 4rem; --space-20: 5rem; --space-24: 6rem; --space-32: 8rem;

  --radius-sm: 0.25rem; --radius-md: 0.375rem; --radius-full: 9999px;
  --transition-interactive: 180ms cubic-bezier(0.16, 1, 0.3, 1);

  --content-narrow: 640px;
  --content-default: 1000px;
  --content-wide: 1160px;

  --font-display: 'Fraunces', 'DM Serif Display', Georgia, serif;
  --font-body: 'Inter', -apple-system, 'Segoe UI', Helvetica, sans-serif;

  /* Arancio bruciato: identità grafica, non colore di testo minuto */
  --accent: #e27b47;
}

:root, [data-theme='light'] {
  --color-bg: #fafaf7;
  --color-surface: #ffffff;
  --color-surface-offset: #f1f1ec;
  --color-border: #dedcd4;
  --color-divider: #e6e4dd;
  --color-text: #1b2536;
  --color-text-muted: #6b6f76;
  --color-text-faint: #a3a6ac;
  --color-text-inverse: #fafaf7;
  --color-link: #1b2536;
  --color-btn: #1b2536;
  --color-btn-hover: #2c3a52;
  --shadow-sm: 0 1px 2px rgba(27, 37, 54, 0.07);
  --shadow-md: 0 10px 30px rgba(27, 37, 54, 0.1);
}

[data-theme='dark'] {
  --book-cover-bg: #263650;
  --book-cover-border: #3b4b66;
  --color-bg: #1b2536;
  --color-surface: #223047;
  --color-surface-offset: #1f2a3d;
  --color-border: #33415a;
  --color-divider: #2a374d;
  --color-text: #fafaf7;
  --color-text-muted: #a8b0bd;
  --color-text-faint: #74808f;
  --color-text-inverse: #1b2536;
  --color-link: #fafaf7;
  --color-btn: #e27b47;
  --color-btn-hover: #f19365;
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.35);
  --shadow-md: 0 10px 30px rgba(0, 0, 0, 0.4);
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme]) {
    --book-cover-bg: #263650;
    --book-cover-border: #3b4b66;
    --color-bg: #1b2536;
    --color-surface: #223047;
    --color-surface-offset: #1f2a3d;
    --color-border: #33415a;
    --color-divider: #2a374d;
    --color-text: #fafaf7;
    --color-text-muted: #a8b0bd;
    --color-text-faint: #74808f;
    --color-text-inverse: #1b2536;
    --color-link: #fafaf7;
    --color-btn: #e27b47;
    --color-btn-hover: #f19365;
  }
}

/* ===== Base ===== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html {
  -webkit-text-size-adjust: none; text-size-adjust: none;
  -webkit-font-smoothing: antialiased; -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
  scroll-behavior: smooth;
  scroll-padding-top: var(--space-20);
}

body {
  min-height: 100dvh;
  font-family: var(--font-body);
  font-size: var(--text-base);
  line-height: 1.6;
  color: var(--color-text);
  background-color: var(--color-bg);
}

img, svg { display: block; max-width: 100%; height: auto; }
ul[role='list'] { list-style: none; }
button { cursor: pointer; background: none; border: none; font: inherit; color: inherit; }

h1, h2, h3 {
  font-family: var(--font-display);
  font-weight: 600;
  line-height: 1.1;
  letter-spacing: -0.02em;
  text-wrap: balance;
}
p, li, dd, figcaption, blockquote { text-wrap: pretty; }

a { color: inherit; }
a, button { transition: color var(--transition-interactive), background var(--transition-interactive), border-color var(--transition-interactive), opacity var(--transition-interactive); }

::selection { background: rgba(226, 123, 71, 0.28); }

:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; border-radius: var(--radius-sm); }

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: 0.01ms !important; transition-duration: 0.01ms !important; scroll-behavior: auto !important; }
}

.skip {
  position: absolute; left: var(--space-4); top: -3rem; z-index: 100;
  background: var(--color-text); color: var(--color-text-inverse);
  padding: var(--space-2) var(--space-4); border-radius: var(--radius-sm);
  font-size: var(--text-sm); text-decoration: none;
}
.skip:focus { top: var(--space-4); }

.wrap { width: 100%; max-width: var(--content-wide); margin-inline: auto; padding-inline: clamp(var(--space-5), 5vw, var(--space-12)); }

/* ===== Header ===== */
.site-head {
  position: sticky; top: 0; z-index: 50;
  background: color-mix(in srgb, var(--color-bg) 90%, transparent);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid transparent;
  transition: border-color var(--transition-interactive);
}
.site-head.is-scrolled { border-bottom-color: var(--color-divider); }

.head-inner { display: flex; align-items: center; justify-content: space-between; gap: var(--space-6); min-height: 4.25rem; }

.brand { display: inline-flex; align-items: center; gap: var(--space-3); text-decoration: none; color: var(--color-text); }
.brand .avatar { flex: none; }
.brand-name { font-family: var(--font-display); font-size: var(--text-sm); font-weight: 600; letter-spacing: 0.01em; white-space: nowrap; }

/* Monogramma AV — stesso segno dell'avatar dei caroselli */
.avatar { width: 2rem; height: 2rem; border-radius: var(--radius-full); }
.avatar-disc { fill: var(--color-text); }
.avatar-initials { fill: var(--color-bg); font-family: var(--font-display); font-weight: 700; font-size: 13px; letter-spacing: 0.02em; }

.nav { display: flex; align-items: center; gap: clamp(var(--space-4), 2.2vw, var(--space-8)); }
.nav a { font-size: var(--text-sm); text-decoration: none; color: var(--color-text-muted); padding-block: var(--space-2); }
.nav a:hover { color: var(--color-text); }

.icon-btn {
  display: grid; place-items: center; width: 2.25rem; height: 2.25rem;
  border-radius: var(--radius-full); color: var(--color-text-muted);
  border: 1px solid var(--color-border);
}
.icon-btn:hover { color: var(--color-text); border-color: var(--color-text-muted); }

@media (max-width: 780px) {
  .head-inner { min-height: 3.75rem; }
  .nav { gap: var(--space-4); }
  .nav a[href='#stampa'], .nav a[href='#bio'] { display: none; }
  .brand-name { font-size: var(--text-xs); }
}
@media (max-width: 460px) {
  .nav a[href='#libro'] { display: none; }
}

/* ===== Eyebrow: barra arancio + label, come nei template ===== */
.eyebrow, .label {
  display: flex; align-items: center; gap: var(--space-3);
  font-size: var(--text-xs); font-weight: 600;
  text-transform: uppercase; letter-spacing: 0.18em;
  color: var(--color-text-muted);
}
.eyebrow::before, .label::before {
  content: ''; flex: none;
  width: 2.25rem; height: 3px;
  background: var(--accent);
}

/* ===== Hero ===== */
.hero { padding-block: clamp(var(--space-16), 11vw, var(--space-32)) var(--space-12); }
.hero-inner { max-width: 46rem; }
.hero .eyebrow { margin-bottom: var(--space-6); }
.hero h1 { font-size: var(--text-2xl); margin-bottom: var(--space-6); }
.hero h1 em { font-style: italic; font-weight: 600; color: var(--accent); }

.lede { font-size: var(--text-lg); color: var(--color-text-muted); max-width: 34rem; }

.cta-row { display: flex; flex-wrap: wrap; align-items: center; gap: var(--space-3); margin-top: var(--space-8); }

.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: var(--space-2);
  font-size: var(--text-sm); font-weight: 500; text-decoration: none;
  padding: var(--space-3) var(--space-6); border-radius: var(--radius-md);
  border: 1px solid transparent;
}
.btn-primary { background: var(--color-btn); color: var(--color-text-inverse); }
.btn-primary:hover { background: var(--color-btn-hover); }
.btn-ghost { border-color: var(--color-border); color: var(--color-text); }
.btn-ghost:hover { border-color: var(--color-text-muted); }
.btn svg { flex: none; }

.hero-rule { height: 1px; background: var(--color-divider); max-width: var(--content-wide); margin: clamp(var(--space-8), 6vw, var(--space-16)) auto 0; }

/* ===== Sections ===== */
.section { padding-block: clamp(var(--space-16), 9vw, var(--space-24)); }
.section-alt { background: var(--color-surface-offset); border-block: 1px solid var(--color-divider); }

.label { margin-bottom: var(--space-5); }

.section h2 { font-size: var(--text-xl); margin-bottom: var(--space-4); max-width: 30ch; }
/* Divider arancio sotto il titolo — segno del template B2 */
.section h2.ruled::after {
  content: ''; display: block;
  width: 3rem; height: 3px; background: var(--accent);
  margin-top: var(--space-5);
}

.sub { font-size: var(--text-lg); color: var(--color-text-muted); margin-bottom: var(--space-6); max-width: 42ch; }
.sub--wide { max-width: 58ch; }

.col-main p { max-width: 60ch; margin-bottom: var(--space-4); }
.contact p, .section > .wrap > p { max-width: 60ch; }

.note { font-size: var(--text-sm); color: var(--color-text-muted); margin-top: var(--space-6); }
.note a, .prose a {
  color: var(--color-link); text-decoration: underline;
  text-decoration-color: var(--accent); text-decoration-thickness: 2px; text-underline-offset: 3px;
}
.note a:hover, .prose a:hover { text-decoration-color: var(--color-text-muted); }

.list { margin: var(--space-6) 0 var(--space-2); padding-left: 0; list-style: none; max-width: 55ch; }
.list li { position: relative; padding-left: var(--space-8); margin-bottom: var(--space-4); color: var(--color-text-muted); }
.list li .num {
  position: absolute; left: 0; top: 0.05em;
  font-family: var(--font-display); font-weight: 700; font-size: var(--text-base);
  color: var(--accent); font-variant-numeric: tabular-nums;
}

blockquote {
  font-family: var(--font-display); font-style: italic;
  font-size: var(--text-lg); line-height: 1.35;
  color: var(--color-text);
  border-left: 3px solid var(--accent);
  padding-left: var(--space-6);
  margin: var(--space-8) 0;
  max-width: 40ch;
}

/* ===== Griglia a due colonne ===== */
.grid-2 { display: grid; grid-template-columns: minmax(0, 20rem) minmax(0, 1fr); gap: clamp(var(--space-8), 6vw, var(--space-20)); align-items: start; }
.grid-2--flip { grid-template-columns: minmax(0, 1fr) minmax(0, 20rem); }
@media (max-width: 860px) {
  .grid-2, .grid-2--flip { grid-template-columns: 1fr; gap: var(--space-12); }
  .grid-2--flip .col-side { order: -1; }
}

/* ===== Libro ===== */
.book-card { position: sticky; top: 6rem; }
@media (max-width: 860px) { .book-card { position: static; } }

.book-cover {
  width: 100%; max-width: 15rem; height: auto;
  aspect-ratio: 2 / 3; object-fit: cover;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  box-shadow: var(--shadow-md);
}

.book-meta { font-size: var(--text-xs); color: var(--color-text-muted); margin-top: var(--space-4); line-height: 1.6; }

/* ===== Ritratto e dati ===== */
.portrait { margin-bottom: var(--space-8); }
.portrait-img {
  width: 100%; max-width: 17rem; height: auto;
  aspect-ratio: 4 / 5; object-fit: cover; object-position: 50% 12%;
  border-radius: var(--radius-sm);
  border: 1px solid var(--color-border);
  box-shadow: var(--shadow-sm);
}
.portrait figcaption { font-size: var(--text-xs); color: var(--color-text-muted); margin-top: var(--space-3); }

.facts { display: grid; gap: var(--space-4); border-top: 3px solid var(--accent); padding-top: var(--space-6); max-width: 17rem; }
.facts dt { font-size: var(--text-xs); text-transform: uppercase; letter-spacing: 0.12em; color: var(--color-text-faint); }
.facts dd { font-size: var(--text-sm); color: var(--color-text); }

/* ===== Card ===== */
.cards { display: grid; grid-template-columns: repeat(auto-fit, minmax(15rem, 1fr)); gap: var(--space-5); margin-top: var(--space-10); }
.card {
  background: var(--color-surface); border: 1px solid var(--color-border);
  border-radius: var(--radius-md); padding: var(--space-6);
  box-shadow: var(--shadow-sm);
  border-top: 3px solid var(--accent);
}
.card h3 { font-size: var(--text-lg); margin-bottom: var(--space-2); }
.card p { font-size: var(--text-sm); color: var(--color-text-muted); max-width: none; }

/* ===== Canali ===== */
.channels { display: grid; grid-template-columns: repeat(auto-fit, minmax(17rem, 1fr)); gap: var(--space-5); margin-top: var(--space-10); }
.channel {
  display: flex; gap: var(--space-4); align-items: flex-start;
  background: var(--color-surface); border: 1px solid var(--color-border);
  border-radius: var(--radius-md); padding: var(--space-5) var(--space-6);
  text-decoration: none;
}
.channel:hover { border-color: var(--accent); }
.channel-icon { flex: none; width: 1.5rem; height: 1.5rem; color: var(--accent); margin-top: 0.15rem; }
.channel > span { display: block; }
.channel-title { display: block; font-family: var(--font-display); font-weight: 600; font-size: var(--text-base); }
.channel-handle { display: block; font-size: var(--text-sm); font-weight: 500; color: var(--color-text); margin-bottom: var(--space-2); }
.channel-desc { display: block; font-size: var(--text-sm); color: var(--color-text-muted); line-height: 1.5; }

/* ===== Contatti ===== */
.contact { max-width: var(--content-default); }
.mail {
  display: inline-block; font-family: var(--font-display);
  font-size: clamp(1.25rem, 1rem + 1.6vw, 2rem);
  color: var(--color-text); text-decoration: none;
  border-bottom: 3px solid var(--accent);
  padding-bottom: var(--space-1);
  word-break: break-word;
}
.mail:hover { border-bottom-color: var(--color-text-muted); }

/* ===== Footer ===== */
.site-foot { padding-block: var(--space-12); border-top: 1px solid var(--color-divider); }
.foot-inner { display: flex; flex-wrap: wrap; align-items: center; gap: var(--space-4) var(--space-8); }
.foot-name { font-family: var(--font-display); font-size: var(--text-sm); font-weight: 600; }
.foot-nav { display: flex; flex-wrap: wrap; align-items: center; gap: var(--space-5); margin-right: auto; }
.foot-nav a { font-size: var(--text-sm); color: var(--color-text-muted); text-decoration: none; }
.foot-nav a:hover { color: var(--color-text); }
.foot-legal { font-size: var(--text-xs); color: var(--color-text-faint); width: 100%; }

/* ===== Prose (pagina privacy) ===== */
.prose h3 { font-size: var(--text-lg); margin-top: var(--space-8); margin-bottom: var(--space-3); }
.prose p { margin-bottom: var(--space-4); max-width: 66ch; }