/* ==========================================================
   KATCHKIT UI FRAMEWORK - v2.0 (All-in-One)
   Sito: 7Katch.github.io
   Descrizione: Design System unificato, Componenti e Theming
   ========================================================== */

/* ── 1. DESIGN TOKENS & THEMING DINAMICO ─────────────────── */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;900&family=JetBrains+Mono:wght@400;500&display=swap');
@import url("https://cdn.jsdelivr.net/npm/bootstrap-icons@1.13.1/font/bootstrap-icons.min.css");

/* importo bootstrap icons */
:root {
  /* Backgrounds & Base */
  --bg: #080810;
  --bg-card: #0f0f1a;
  --bg-card-hover: #141428;
  --code-bg: #0a0a16;

  /* Borders */
  --border: rgba(120, 100, 255, 0.15);
  --border-hover: rgba(120, 100, 255, 0.4);

  /* Testi generali */
  --text-primary: #f0eeff;
  --text-secondary: #9488c2;
  --text-muted: #5a5080;

  /* Colori Semantici Statici (per bottoni specifici o alert) */
  --accent: #7c5cfc;
  --accent-soft: #a78bfa;
  --tag-bg: rgba(124, 92, 252, 0.10);
  --green: #34d399;
  --amber: #fbbf24;
  --coral: #f87171;
  --teal: #22d3ee;

  /* Dimensioni e Spaziature */
  --r-sm: 6px;
  --r-md: 10px;
  --r-lg: 14px;
  --r-xl: 16px;
  --r-2xl: 20px;
  --r-pill: 100px;
  --nav-h: 60px;
  --sb-w: 240px;

  /* ⬇ TEMA DI DEFAULT (Ambra) ⬇ */
  --kk-primary: #fbbf24;
  --kk-rgb: 251, 191, 36;
  --kk-grad-end: #f59e0b;
}

/* PRESET: TEAL (Azzurro) */
.theme-teal {
  --kk-primary: #22d3ee;
  --kk-rgb: 34, 211, 238;
  --kk-grad-end: #06b6d4;
}

/* PRESET: CORAL (Rosso) */
.theme-coral {
  --kk-primary: #f87171;
  --kk-rgb: 248, 113, 113;
  --kk-grad-end: #ef4444;
}

/* PRESET: EMERALD (Verde) */
.theme-emerald {
  --kk-primary: #34d399;
  --kk-rgb: 52, 211, 153;
  --kk-grad-end: #10b981;
}

/* PRESET: PURPLE (Viola base) */
.theme-purple {
  --kk-primary: #a78bfa;
  --kk-rgb: 167, 139, 250;
  --kk-grad-end: #7c5cfc;
}

/* PRESET: BLUE (Blu tecnologico - Perfetto per Reti o Cloud) */
.theme-blue {
  --kk-primary: #60a5fa;
  --kk-rgb: 96, 165, 250;
  --kk-grad-end: #3b82f6;
}

/* PRESET: ROSE (Rosa acceso - Molto elegante e moderno) */
.theme-rose {
  --kk-primary: #f472b6;
  --kk-rgb: 244, 114, 182;
  --kk-grad-end: #db2777;
}

/* PRESET: SLATE (Grigio/Argento - Monocromatico, per argomenti neutri o matematici) */
.theme-slate {
  --kk-primary: #94a3b8;
  --kk-rgb: 148, 163, 184;
  --kk-grad-end: #64748b;
}


/* ── 2. RESET E BASE HTML ────────────────────────────────── */

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: 'Inter', sans-serif;
  background: var(--bg);
  color: var(--text-primary);
  line-height: 1.6;
  overflow-x: hidden;
}

/* Sfondo a pallini globale */
.dot-grid::before {
  content: '';
  position: fixed;
  inset: 0;
  background-image: radial-gradient(circle, rgba(var(--kk-rgb), 0.06) 1px, transparent 1px);
  background-size: 40px 40px;
  pointer-events: none;
  z-index: -1;
}

a {
  color: var(--kk-primary);
  text-decoration: none;
  transition: color 0.2s;
}

a:hover {
  filter: brightness(1.2);
}

/* Stile per i tag <code> inline (stile markdown) */
code:not(pre code) {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.85em;
  background: var(--code-bg);
  padding: 0.15em 0.4em;
  border-radius: 4px;
  border: 1px solid var(--border);
  color: var(--text-primary);
}

/* ── 2.5 TEXT UTILITY CLASSES (Per non usare style="color:...") ── */

/* Colore dinamico del tema (verde, corallo, ecc) */
.text-theme {
  color: var(--kk-primary) !important;
}

/* Viola fisso */
.text-accent {
  color: var(--accent) !important;
}


/* Rosso/Corallo */
.text-coral {
  color: var(--coral) !important;
}

/* Azzurro */
.text-teal {
  color: var(--teal) !important;
}

/* Verde Smeraldo */
.text-green {
  color: var(--green) !important;
}

/* Giallo/Ambra */
.text-amber {
  color: var(--amber) !important;
}

/* Grigio scuro/spento */
.text-muted {
  color: var(--text-muted) !important;
}


/* ── 3. NAVBAR E BREADCRUMBS ─────────────────────────────── */

nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 2.5rem 0 1.5rem;
  /* Padding fuso tra so.css e katchkit */
  height: var(--nav-h);
  background: rgba(8, 8, 16, 0.65);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border);
}

.nav-left,
.nav-right {
  display: flex;
  align-items: center;
  gap: 12px;
}

#sidebar-toggle {
  background: transparent;
  border: none;
  color: var(--text-secondary);
  cursor: pointer;
  padding: 6px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background 0.2s, color 0.2s;
}

#sidebar-toggle:hover {
  background: rgba(255, 255, 255, 0.1) !important;
  color: var(--kk-primary) !important;
}

.nav-logo {
  font-family: 'JetBrains Mono', monospace;
  font-size: 13px;
  font-weight: 500;
  color: var(--kk-primary);
  letter-spacing: 0.05em;
  text-decoration: none;
}

.nav-back {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-family: 'JetBrains Mono', monospace;
  font-size: 11px;
  color: var(--text-muted);
  text-decoration: none;
  padding: 5px 14px;
  border: 1px solid var(--border);
  border-radius: var(--r-pill);
  transition: all 0.2s;
  letter-spacing: 0.04em;
}

.nav-back:hover {
  color: var(--kk-primary);
  border-color: rgba(var(--kk-rgb), 0.4);
}

.nav-breadcrumb {
  display: flex;
  align-items: center;
  gap: 8px;
  font-family: 'JetBrains Mono', monospace;
  font-size: 11px;
  color: var(--text-muted);
  margin-bottom: 2.5rem;
  letter-spacing: 0.04em;
}

.nav-breadcrumb a {
  color: var(--text-muted);
}

.nav-breadcrumb a:hover {
  color: var(--kk-primary);
  text-decoration: none;
}

.nav-breadcrumb span {
  color: var(--border-hover);
}


.section-block ol {
  padding-left: 2rem;
  margin-bottom: 1.5rem;
}

.section-block ol li {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.85;
  margin-bottom: 0.75rem;
}

.section-block ul li {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.85;
  margin-bottom: 0.75rem;
}


/* ── 4. HERO SECTION DINAMICA ────────────────────────────── */

.hero {
  min-height: 55vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 8rem 2rem 5rem;
  position: relative;
}

.hero-glow {
  position: absolute;
  top: 25%;
  left: 50%;
  transform: translateX(-50%);
  width: 700px;
  height: 500px;
  pointer-events: none;
  background: radial-gradient(ellipse, rgba(var(--kk-rgb), 0.08) 0%, transparent 65%);
}

.hero-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 18px;
  background: rgba(var(--kk-rgb), 0.08);
  border: 1px solid rgba(var(--kk-rgb), 0.3);
  border-radius: var(--r-pill);
  font-family: 'JetBrains Mono', monospace;
  font-size: 11px;
  color: var(--kk-primary);
  letter-spacing: 0.08em;
  margin-bottom: 2rem;
  text-transform: uppercase;
}

.topic-num {
  font-family: 'JetBrains Mono', monospace;
  font-size: 11px;
  color: var(--kk-primary);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  margin-bottom: 0.75rem;
  display: flex;
  align-items: center;
  gap: 8px;
}

.topic-num::before {
  content: '';
  display: inline-block;
  width: 20px;
  height: 1px;
  background: var(--kk-primary);
}

.topic-hero-title,
.page-hero h1 {
  font-size: clamp(2.2rem, 6vw, 4.5rem);
  font-weight: 900;
  letter-spacing: -0.03em;
  line-height: 1.05;
  margin-bottom: 1.25rem;
  background: linear-gradient(135deg, #f0eeff 0%, var(--kk-primary) 55%, var(--kk-grad-end) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-sub {
  font-size: clamp(0.95rem, 1.8vw, 1.15rem);
  color: var(--text-secondary);
  max-width: 640px;
  margin: 0 auto 2.5rem;
  font-weight: 300;
  line-height: 1.8;
}


/* ── 5. LAYOUT E CONTENUTO DELLE SEZIONI ─────────────────── */

.content-wrap {
  max-width: 860px;
  margin: 0 auto;
  padding: 3rem 2rem 6rem;
}

.section-block {
  margin-bottom: 3rem;
  scroll-margin-top: calc(var(--nav-h) + 1.25rem);
  padding: 20px;
}

.section-block p {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.85;
  margin-bottom: 0.75rem;
}

.section-block p:last-child {
  margin-bottom: 0;
}

.section-block h2 {
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 0.75rem;
  padding-bottom: 0.5rem;
  border-bottom: 1px solid rgba(var(--kk-rgb), 0.2);
  display: flex;
  align-items: center;
  gap: 10px;
}

.section-block h2 .dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--kk-primary);
  flex-shrink: 0;
}

code.inline {
  font-family: 'JetBrains Mono', monospace;
  font-size: 11.5px;
  color: var(--kk-primary);
  background: rgba(var(--kk-rgb), 0.08);
  padding: 1px 6px;
  border-radius: 4px;
}

.keyword {
  color: var(--text-primary);
  font-weight: 600;
}

.sub-tag {
  display: inline-block;
  font-family: 'JetBrains Mono', monospace;
  font-size: 9px;
  padding: 1px 7px;
  border-radius: var(--r-pill);
  background: rgba(var(--kk-rgb), 0.12);
  color: var(--kk-primary);
  border: 1px solid rgba(var(--kk-rgb), 0.3);
  margin-left: 8px;
  vertical-align: middle;
  font-weight: 600;
}


/* ── 6. BOX, ALERT E CHIAMATE (THEME-AWARE) ──────────────── */

/* Sostituisce i vecchi amber-box, teal-box ecc. Ora si adatta al tema! */
.theme-box {
  background: rgba(var(--kk-rgb), 0.07);
  border: 1px solid rgba(var(--kk-rgb), 0.25);
  border-radius: var(--r-md);
  padding: 1rem 1.25rem;
  margin: 1.5rem 0;
  font-size: 13px;
  color: var(--kk-primary);
  line-height: 1.7;
}

.theme-box strong {
  color: var(--kk-primary) !important;
}

/* Box Semantici Statici (restano invariati per indicare errori, successi, ecc.) */
.highlight-box {
  background: rgba(52, 211, 153, 0.07);
  border: 1px solid rgba(52, 211, 153, 0.25);
  border-radius: var(--r-md);
  padding: 1rem;
  color: var(--green);
}

.warn-box {
  background: rgba(248, 113, 113, 0.07);
  border: 1px solid rgba(248, 113, 113, 0.25);
  border-radius: var(--r-md);
  padding: 1rem;
  color: var(--coral);
}


/* ── 7. GRIGLIA DELL'INDICE E CARDS ──────────────────────── */

.index-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 8px;
  margin-bottom: 2.5rem;
}

.index-item {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--r-md);
  padding: .75rem 1rem;
  font-size: 12px;
  color: var(--text-muted);
  font-family: 'JetBrains Mono', monospace;
  border-left: 2px solid var(--kk-primary);
  cursor: pointer;
  transition: background .15s, border-color .15s, transform .12s;
  user-select: none;
}

.index-item:hover {
  background: var(--bg-card-hover);
  border-left-color: var(--kk-primary);
  transform: translateY(-1px);
}

.index-item:active {
  transform: translateY(0);
}

.index-item .idx-num {
  color: var(--kk-primary);
  font-size: 10px;
  margin-bottom: 2px;
}

.index-item .idx-name {
  color: var(--text-secondary);
  font-size: 12px;
  font-family: 'Inter', sans-serif;
  font-weight: 600;
}


/* ── CARDS GENERICHE (Definizione, Tip, Formula) ── */
.card-def,
.card-tip,
.card-formula,
.card-warning {
  background: #111827;
  /* Sfondo scuro per far risaltare il neon */
  border-radius: var(--r-md);
  margin-bottom: 1.5rem;
  overflow: hidden;
  border: 1px solid rgba(255, 255, 255, 0.05);
}

.card-def {
  --card-color: #34d399;
  --card-rgb: 52, 211, 153;
}

.card-tip {
  --card-color: #a78bfa;
  --card-rgb: 167, 139, 250;
}

.card-formula {
  --card-color: #fbbf24;
  --card-rgb: 251, 191, 36;
}

.card-warning {
  --card-color: #f59e0b;
  --card-rgb: 245, 158, 11;
}

/* ── MODIFICATORI E COLORI CARDS ── */
.active-border {
  border-color: var(--card-color) !important;
  background: rgba(var(--card-rgb), 0.05) !important;
}

.card-variant-accent {
  --card-color: var(--accent);
  --card-rgb: 124, 92, 252;
}

.card-variant-teal {
  --card-color: var(--teal);
  --card-rgb: 34, 211, 238;
}

.card-variant-yellow {
  --card-color: #f59e0b; /* Amber / Ocra */
  --card-rgb: 245, 158, 11;
}

.card-def .header,
.card-tip .header,
.card-formula .header,
.card-warning .header {
  position: relative;
  z-index: 1;
  display: flex;
  align-items: center;
  gap: 8px;
  color: var(--card-color);
  font-family: 'JetBrains Mono', monospace;
  font-size: 11px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  padding: 12px 16px;
  background: rgba(0, 0, 0, 0.2);
  /* Effetto neon led */
  border-bottom: 1px solid var(--card-color);
  box-shadow: 0 4px 15px -2px rgba(var(--card-rgb), 0.5), 0 0 5px rgba(var(--card-rgb), 0.3);
}



.card-def .content,
.card-tip .content,
.card-formula .content,
.card-warning .content {
  padding: 24px 28px;
  color: var(--text-primary);
  line-height: 1.7;
}

.card-def .content p:last-child,
.card-tip .content p:last-child,
.card-formula .content p:last-child,
.card-warning .content p:last-child {
  margin-bottom: 0;
}

.card-def .content .keyword,
.card-tip .content .keyword,
.card-formula .content .keyword,
.card-warning .content .keyword {
  color: var(--card-color);
}

/* Specifico per formula */
.card-formula .content {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 24px 16px;
}

.card-formula .content .formula-text {
  font-size: 1.1rem;
  font-weight: 700;
  margin-bottom: 12px;
  color: #fff;
  font-family: 'Inter', sans-serif;
}

.card-formula .content .formula-desc {
  font-size: 13px;
  color: var(--text-secondary);
}

.card-formula .content .formula-desc .badge {
  background: rgba(251, 191, 36, 0.15);
  color: #fbbf24;
  padding: 2px 6px;
  border-radius: 4px;
  font-family: 'JetBrains Mono', monospace;
  font-size: 11px;
}


/* ── 7.4.5 CODE WINDOW (Stile Terminale/macOS) ── */
.kk-code-window {
  background: #0a0a16;
  border: 1px solid var(--border);
  border-radius: 8px;
  overflow: hidden;
  box-shadow: 0 10px 30px rgba(0,0,0,0.5);
  margin-bottom: 1.5rem;
}

.kk-window-header {
  background: rgba(255,255,255,0.05);
  padding: 10px 16px;
  display: flex;
  align-items: center;
  border-bottom: 1px solid var(--border);
  gap: 16px;
}

.kk-window-dots {
  display: flex;
  gap: 8px;
}

.kk-window-dot {
  width: 12px;
  height: 12px;
  border-radius: 50%;
}

.kk-window-dot.red { background: #ff5f56; }
.kk-window-dot.yellow { background: #ffbd2e; }
.kk-window-dot.green { background: #27c93f; }

.kk-window-title {
  color: var(--text-muted);
  font-family: 'JetBrains Mono', monospace;
  font-size: 12px;
  letter-spacing: 0.05em;
}

.kk-window-body {
  padding: 1.5rem;
  overflow-x: auto;
}


/* ── 7.5 CALLOUTS (Box informativi con barra laterale) ── */
.kk-callout {
  margin-top: 2rem;
  padding: 1.25rem;
  background: rgba(var(--kk-rgb), 0.05); /* Sfondo colorato dinamicamente! */
  border-left: 3px solid var(--kk-primary); /* Bordo colorato dinamicamente! */
  color: var(--text-secondary);
  font-size: 0.95rem;
  line-height: 1.6;
  border-radius: 0 10px 10px 0;
}


/* ── 7.6 TABELLE CYBERPUNK ── */
.kk-table-container {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--r-md);
  overflow: hidden;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.4);
  margin-bottom: 2rem;
}

.kk-table-cyber {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
  font-size: 14px;
}

.kk-table-cyber thead {
  background: rgba(var(--kk-rgb), 0.08);
  border-bottom: 1px solid rgba(var(--kk-rgb), 0.3);
  box-shadow: 0 2px 10px rgba(var(--kk-rgb), 0.15);
}

.kk-table-cyber th {
  padding: 1.25rem 1rem;
  font-weight: 700;
  color: var(--kk-primary);
  font-family: 'JetBrains Mono', monospace;
  font-size: 13px;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.kk-table-cyber tbody tr {
  border-bottom: 1px solid rgba(255, 255, 255, 0.03);
  transition: background 0.2s;
}

.kk-table-cyber tbody tr:hover {
  background: rgba(var(--kk-rgb), 0.03);
}

.kk-table-cyber tbody tr:last-child {
  border-bottom: none;
}

.kk-table-cyber td {
  padding: 1rem;
  color: var(--text-secondary);
}

.kk-table-cyber td strong {
  color: var(--kk-primary);
  font-weight: 600;
}

.kk-table-cyber td small {
  color: var(--text-muted);
  font-size: 12px;
}

/* ── 8. SIDEBAR A SCOMPARSA (GEMINI STYLE) ───────────────── */

.so-sidebar {
  position: fixed;
  top: var(--nav-h);
  left: 0;
  width: var(--sb-w);
  height: calc(100vh - var(--nav-h));
  overflow-y: auto;
  overflow-x: hidden;
  background: rgba(8, 8, 16, 0.98);
  border-right: 1px solid var(--border);
  z-index: 1000;
  display: flex;
  flex-direction: column;
  padding-bottom: 3rem;
  transform: translateX(-100%);
  transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  box-shadow: 4px 0 24px rgba(0, 0, 0, 0.6);
  scrollbar-width: thin;
  scrollbar-color: rgba(var(--kk-rgb), .25) transparent;
}

.so-sidebar.open {
  transform: translateX(0);
}

.so-sidebar::-webkit-scrollbar {
  width: 3px;
}

.so-sidebar::-webkit-scrollbar-track {
  background: transparent;
}

.so-sidebar::-webkit-scrollbar-thumb {
  background: rgba(var(--kk-rgb), .3);
  border-radius: 3px;
}

.sb-label {
  font-family: 'JetBrains Mono', monospace;
  font-size: 9px;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--text-muted);
  padding: 1rem 1rem .45rem;
  display: flex;
  align-items: center;
  gap: 7px;
  flex-shrink: 0;
}

.sb-label::before {
  content: '';
  display: inline-block;
  width: 10px;
  height: 1px;
  background: rgba(var(--kk-rgb), .55);
  flex-shrink: 0;
}

.sb-pages {
  list-style: none;
  flex-shrink: 0;
  border-bottom: 1px solid var(--border);
  padding-bottom: .5rem;
  margin-bottom: .25rem;
}

.sb-pages li a,
.sb-pages li .sb-cur {
  display: flex;
  align-items: center;
  gap: 7px;
  padding: 4px 1rem;
  font-family: 'JetBrains Mono', monospace;
  font-size: 10px;
  color: var(--text-muted);
  text-decoration: none;
  transition: color .15s, background .15s;
  border-left: 2px solid transparent;
  line-height: 1.35;
}

.sb-pages li a:hover {
  color: var(--text-secondary);
  background: rgba(var(--kk-rgb), .04);
  border-left-color: rgba(var(--kk-rgb), .25);
}

.sb-pages li .sb-cur {
  color: var(--kk-primary);
  font-weight: 700;
  border-left-color: var(--kk-primary);
  background: rgba(var(--kk-rgb), .07);
}

.sb-pdot {
  width: 4px;
  height: 4px;
  border-radius: 50%;
  background: currentColor;
  flex-shrink: 0;
  opacity: .45;
}

.sb-cur .sb-pdot {
  opacity: 1;
}

.sb-sections {
  list-style: none;
  flex: 1;
}

.sb-sections li .sb-link {
  display: flex;
  align-items: flex-start;
  gap: 7px;
  padding: 5px 1rem;
  font-size: 11px;
  color: var(--text-muted);
  text-decoration: none;
  border-left: 2px solid transparent;
  transition: color .15s, background .15s, border-color .15s;
  line-height: 1.4;
  cursor: pointer;
  width: 100%;
  background: none;
  border: none;
  font-family: 'Inter', sans-serif;
  text-align: left;
}

.sb-sections li .sb-link:hover {
  color: var(--text-secondary);
  background: rgba(var(--kk-rgb), .04);
  border-left-color: rgba(var(--kk-rgb), .3);
}

.sb-sections li.sb-active .sb-link {
  color: var(--kk-primary);
  font-weight: 600;
  border-left-color: var(--kk-primary);
  background: rgba(var(--kk-rgb), .07);
}

.sb-idx {
  font-family: 'JetBrains Mono', monospace;
  font-size: 9px;
  color: rgba(var(--kk-rgb), .4);
  flex-shrink: 0;
  min-width: 28px;
  margin-top: 2px;
}

.sb-active .sb-idx {
  color: var(--kk-primary);
}

.sb-sub-sections {
  list-style: none;
  padding-left: 28px;
  /* Allinea col testo del parent */
  margin-top: 0;
  margin-bottom: 0;
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.3s ease-in-out, margin-bottom 0.3s ease-in-out;
}

.sb-sections li.sb-active>.sb-sub-sections {
  max-height: 800px;
  margin-bottom: 4px;
}

/* Stili per l'icona chevron */
.sb-link .bi-chevron-down {
  margin-left: auto;
  font-size: 10px;
  transition: transform 0.2s ease;
  opacity: 0.5;
}

.sb-sections li.sb-active>.sb-link .bi-chevron-down {
  transform: rotate(180deg);
  opacity: 1;
}

.sb-sections li.user-collapsed>.sb-sub-sections {
  max-height: 0 !important;
  margin-bottom: 0 !important;
}

.sb-sections li.user-collapsed>.sb-link .bi-chevron-down {
  transform: rotate(0deg) !important;
  opacity: 0.5 !important;
}

.sb-sub-sections li .sb-sub-link {
  display: flex;
  align-items: flex-start;
  padding: 4px 12px;
  font-size: 10.5px;
  color: var(--text-muted);
  text-decoration: none;
  border-left: 1px solid rgba(var(--kk-rgb), 0.15);
  transition: color .15s, border-color .15s, background .15s;
  line-height: 1.4;
  cursor: pointer;
  width: 100%;
  background: none;
  border-top: none;
  border-right: none;
  border-bottom: none;
  font-family: 'Inter', sans-serif;
  text-align: left;
}

.sb-sub-sections li .sb-sub-link:hover {
  color: var(--text-secondary);
  border-left-color: rgba(var(--kk-rgb), .4);
  background: rgba(var(--kk-rgb), .02);
}

.sb-sub-sections li.sb-active .sb-sub-link {
  color: var(--kk-primary);
  border-left-color: var(--kk-primary);
}

@keyframes sbFlash {
  0% {
    box-shadow: inset 0 0 0 2px rgba(var(--kk-rgb), .55);
    border-radius: 8px;
  }

  100% {
    box-shadow: inset 0 0 0 2px rgba(var(--kk-rgb), 0);
    border-radius: 8px;
  }
}

.sb-flash {
  animation: sbFlash .75s ease-out;

}


/* ── 9. COMPONENTI EXTRA (Codice, Liste, Bottoni) ────────── */
/* ══════════════════════════════════════════
   NUOVI COMPONENTI (Terminal, Algo, Compare, ecc.)
══════════════════════════════════════════ */

/* — SPLIT CARD: testo a sx, visual a dx — */
.split-card {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0;
  border: 1px solid var(--border);
  border-radius: 12px;
  overflow: hidden;
  margin: 1.5rem 0;
  background: var(--bg-card);
}

.split-card-text {
  padding: 1.5rem;
  border-right: 1px solid var(--border);
}

.split-card-visual {
  padding: 1.25rem;
  background: rgba(8, 8, 16, 0.6);
  display: flex;
  align-items: center;
  justify-content: center;
}

@media (max-width: 700px) {
  .split-card {
    grid-template-columns: 1fr;
  }

  .split-card-text {
    border-right: none;
    border-bottom: 1px solid var(--border);
  }
}

/* — TERMINAL CARD: stile output terminale — */
.terminal-card {
  background: #050508;
  border: 1px solid rgba(var(--kk-rgb), .25);
  border-radius: 10px;
  overflow: hidden;
  margin: 1.5rem 0;
  font-family: 'JetBrains Mono', monospace;
}

.terminal-header {
  background: rgba(var(--kk-rgb), .06);
  border-bottom: 1px solid rgba(var(--kk-rgb), .15);
  padding: 8px 14px;
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 11px;
  color: var(--text-muted);
}

.terminal-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
}

.terminal-dot.r {
  background: #ff5f57;
}

.terminal-dot.y {
  background: #febc2e;
}

.terminal-dot.g {
  background: #28c840;
}

.terminal-body {
  padding: 1.1rem 1.25rem;
  font-size: 12.5px;
  line-height: 1.8;
  color: #c8d3e0;
}

.terminal-body .t-comment {
  color: rgba(var(--kk-rgb), .45);
}

.terminal-body .t-key {
  color: var(--kk-primary);
}

.terminal-body .t-val {
  color: #a5f3fc;
}

.terminal-body .t-addr {
  color: #fbbf24;
}

.terminal-body .t-ok {
  color: #34d399;
}

.terminal-body .t-err {
  color: #f87171;
}

.terminal-body .t-dim {
  color: rgba(200, 211, 224, .35);
}

/* — ALGO CARD: passi numerati — */
.algo-card {
  border: 1px solid rgba(var(--kk-rgb), .2);
  border-radius: 12px;
  overflow: hidden;
  margin: 1.5rem 0;
}

.algo-card-header {
  background: rgba(var(--kk-rgb), .08);
  padding: .65rem 1.25rem;
  font-family: 'JetBrains Mono', monospace;
  font-size: 11px;
  letter-spacing: .1em;
  text-transform: uppercase;
  color: var(--kk-primary);
  border-bottom: 1px solid rgba(var(--kk-rgb), .15);
}

.algo-steps {
  padding: 1rem 1.25rem;
  display: flex;
  flex-direction: column;
  gap: .6rem;
}

.algo-step {
  display: flex;
  gap: 12px;
  align-items: flex-start;
  padding: .55rem .75rem;
  border-radius: 7px;
  background: rgba(var(--kk-rgb), .04);
  border-left: 3px solid rgba(var(--kk-rgb), .3);
  font-size: 13px;
  color: var(--text-secondary);
}

.algo-step-n {
  font-family: 'JetBrains Mono', monospace;
  font-size: 10px;
  color: var(--kk-primary);
  flex-shrink: 0;
  margin-top: 2px;
  min-width: 24px;
}

/* — FORMULA CARD — */
.formula-card {
  background: rgba(var(--kk-rgb), .05);
  border: 1px solid rgba(var(--kk-rgb), .2);
  border-radius: 10px;
  padding: 1rem 1.5rem;
  margin: 1.25rem 0;
  display: flex;
  align-items: center;
  gap: 1.5rem;
  flex-wrap: wrap;
}

.formula-label {
  font-family: 'JetBrains Mono', monospace;
  font-size: 10px;
  text-transform: uppercase;
  letter-spacing: .1em;
  color: rgba(var(--kk-rgb), .6);
  flex-shrink: 0;
}

.formula-expr {
  font-family: 'JetBrains Mono', monospace;
  font-size: 15px;
  color: #a5f3fc;
  flex: 1;
}

/* — COMPARE CARD: colonne affiancate — */
.compare-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
  margin: 1.5rem 0;
}

@media (max-width: 600px) {
  .compare-grid {
    grid-template-columns: 1fr;
  }
}

.compare-col {
  border: 1px solid var(--border);
  border-radius: 10px;
  overflow: hidden;
}

.compare-col-head {
  padding: .55rem 1rem;
  font-family: 'JetBrains Mono', monospace;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: .08em;
  text-transform: uppercase;
}

.compare-col-head.teal {
  background: rgba(34, 211, 238, .1);
  color: #22d3ee;
  border-bottom: 1px solid rgba(34, 211, 238, .2);
}

.compare-col-head.amber {
  background: rgba(251, 191, 36, .1);
  color: #fbbf24;
  border-bottom: 1px solid rgba(251, 191, 36, .2);
}

.compare-col-head.coral {
  background: rgba(248, 113, 113, .1);
  color: #f87171;
  border-bottom: 1px solid rgba(248, 113, 113, .2);
}

.compare-col-head.green {
  background: rgba(52, 211, 153, .1);
  color: #34d399;
  border-bottom: 1px solid rgba(52, 211, 153, .2);
}

.compare-col-body {
  padding: .75rem 1rem;
}

.compare-row {
  display: flex;
  align-items: flex-start;
  gap: 8px;
  font-size: 12.5px;
  color: var(--text-secondary);
  padding: 4px 0;
  border-bottom: 1px solid rgba(255, 255, 255, .04);
}

.compare-row:last-child {
  border-bottom: none;
}

.compare-row::before {
  content: '›';
  color: var(--kk-primary);
  flex-shrink: 0;
  margin-top: 1px;
}

/* — STAT ROW — */
.stat-row {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  margin: 1.25rem 0;
}

.stat-pill {
  background: rgba(var(--kk-rgb), .08);
  border: 1px solid rgba(var(--kk-rgb), .2);
  border-radius: 8px;
  padding: .5rem 1rem;
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.stat-pill-val {
  font-family: 'JetBrains Mono', monospace;
  font-size: 1.35rem;
  font-weight: 700;
  color: var(--kk-primary);
  line-height: 1;
}

.stat-pill-label {
  font-size: 11px;
  color: var(--text-muted);
}

/* — CALLOUT BOX — */
.callout {
  display: flex;
  gap: 12px;
  align-items: flex-start;
  background: rgba(var(--kk-rgb), .06);
  border: 1px solid rgba(var(--kk-rgb), .2);
  border-radius: 10px;
  padding: 1rem 1.25rem;
  margin: 1.25rem 0;
  font-size: 13.5px;
  color: var(--text-secondary);
  line-height: 1.7;
}

.callout-icon {
  font-size: 18px;
  flex-shrink: 0;
  margin-top: 1px;
}

.callout.warn {
  background: rgba(251, 191, 36, .06);
  border-color: rgba(251, 191, 36, .2);
}

.callout.ok {
  background: rgba(52, 211, 153, .06);
  border-color: rgba(52, 211, 153, .2);
}

/* ── TABELLE E GRAFICI (LRU e WS) ── */
.diag-wrap {
  margin: 1.5rem 0;
  overflow-x: auto;
}

.diag-wrap svg {
  display: block;
  margin: 0 auto;
}

.lru-table {
  width: 100%;
  border-collapse: collapse;
  font-family: 'JetBrains Mono', monospace;
  font-size: 12px;
  margin: 1rem 0;
}

.lru-table th {
  padding: 6px 10px;
  background: rgba(var(--kk-rgb), .08);
  color: var(--kk-primary);
  border: 1px solid rgba(var(--kk-rgb), .15);
  text-align: center;
  font-size: 11px;
}

.lru-table td {
  padding: 5px 10px;
  border: 1px solid rgba(255, 255, 255, .06);
  text-align: center;
  color: var(--text-secondary);
}

.lru-table tr:hover td {
  background: rgba(var(--kk-rgb), .03);
}

.lru-table td.fault {
  color: #f87171;
  font-weight: 700;
}

.lru-table td.evict {
  color: #fbbf24;
}

.lru-table td.hit {
  color: #34d399;
}

.ws-window {
  display: flex;
  gap: 4px;
  margin: 1rem 0;
  flex-wrap: wrap;
}

.ws-cell {
  width: 34px;
  height: 34px;
  border-radius: 6px;
  border: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: 'JetBrains Mono', monospace;
  font-size: 13px;
  font-weight: 700;
  color: var(--text-muted);
  background: var(--bg-card);
  transition: all .2s;
}

.ws-cell.active {
  border-color: rgba(var(--kk-rgb), .5);
  color: var(--kk-primary);
  background: rgba(var(--kk-rgb), .1);
}

.ws-cell.cursor {
  border-color: rgba(251, 191, 36, .6);
  color: #fbbf24;
  background: rgba(251, 191, 36, .1);
  box-shadow: 0 0 8px rgba(251, 191, 36, .3);
}

/* Code Blocks */
.code-block {
  background: var(--code-bg);
  border: 1px solid var(--border);
  border-radius: var(--r-lg);
  overflow: hidden;
  font-family: 'JetBrains Mono', monospace;
  margin: 1.25rem 0;
}

.code-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 10px 16px;
  border-bottom: 1px solid var(--border);
  background: rgba(124, 92, 252, 0.04);
}

.code-dots {
  display: flex;
  gap: 6px;
}

.code-dots span {
  width: 10px;
  height: 10px;
  border-radius: 50%;
}

.dot-red {
  background: #ff5f57;
}

.dot-yellow {
  background: #ffbd2e;
}

.dot-green-dot {
  background: #28c840;
}

.code-body {
  padding: 1.25rem 1.5rem;
  font-size: 12px;
  line-height: 1.85;
  color: #c4b5fd;
  overflow-x: auto;
}

/* Override Prism.js default backgrounds to blend with our Mac window */
.code-body pre[class*="language-"] {
  background: transparent !important;
  margin: 0 !important;
  padding: 0 !important;
}

.code-body code[class*="language-"] {
  background: transparent !important;
}

/* Diagrammi di Stato */
.state-diagram {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
  margin: 1rem 0;
}

.state-box {
  padding: 4px 12px;
  border-radius: var(--r-pill);
  font-size: 12px;
  font-weight: 600;
  font-family: 'JetBrains Mono', monospace;
}

.arrow {
  color: var(--text-muted);
  font-size: 16px;
}

/* Bottoni (Usano il tema principale) */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 26px;
  border-radius: var(--r-md);
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  text-decoration: none;
  transition: all 0.2s;
  border: none;
}

.btn-theme {
  background: rgba(var(--kk-rgb), 0.12);
  color: var(--kk-primary);
  border: 1px solid rgba(var(--kk-rgb), 0.3);
}

.btn-theme:hover {
  background: rgba(var(--kk-rgb), 0.25);
  transform: translateY(-2px);
  color: var(--text-primary);
}

.btn-ghost {
  background: transparent;
  border: 1px solid var(--border-hover);
  color: var(--text-secondary);
}

.btn-ghost:hover {
  border-color: var(--kk-primary);
  color: var(--text-primary);
}

hr.divider {
  border: none;
  border-top: 1px solid var(--border);
  margin: 0;
}

.back-btn-wrap {
  max-width: 900px;
  margin: 0 auto;
  padding: 3rem 2rem 4rem;
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
}

footer {
  border-top: 1px solid var(--border);
  padding: 2rem;
  text-align: center;
}

footer p {
  font-size: 12px;
  color: var(--text-muted);
  font-family: 'JetBrains Mono', monospace;
  line-height: 2;
}

footer a {
  color: var(--kk-primary);
  text-decoration: none;
}

footer a:hover {
  text-decoration: underline;
}

/* ── AFFIANCAMENTO TESTO / IMMAGINE (FLEX LAYOUT) ────────── */
.kk-flex-row {
  display: flex;
  align-items: center;
  /* Allinea verticalmente al centro testo e immagine */
  gap: 2rem;
  /* Spazio di sicurezza tra il testo e l'immagine */
  margin-bottom: 1.5rem;
}

.kk-flex-text {
  flex: 1;
  /* Il testo occupa tutto lo spazio rimanente */
}

.kk-flex-media {
  flex-shrink: 0;
  /* Impedisce all'immagine di rimpicciolirsi troppo */
  display: flex;
  justify-content: center;
}

.kk-flex-media img {
  max-width: 100%;
  /* Evita che l'immagine esca dal suo contenitore */
  height: auto;
  border-radius: var(--r-md, 10px);
  /* Mantiene i bordi arrotondati del sito */
  border: 1.5px solid var(--kk-primary);
  /* Sottile bordo per dare profondità */
}

/* RESPONSIVE: Su schermi piccoli (es. smartphone) incolonna gli elementi */
@media (max-width: 768px) {
  .kk-flex-row {
    flex-direction: column-reverse;
    /* Mette prima il testo e sotto l'immagine */
    gap: 1.25rem;
  }

  .kk-flex-media img {
    max-width: 80%;
    /* Evita che su mobile l'immagine diventi gigantesca */
  }
}

/* ── COMPONENTI EDIDS IMPORTATI ── */

/* GRASP GRID & PATTERN CARDS */
.grasp-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(265px, 1fr));
  gap: 1px;
  background: var(--border);
  border: 1px solid var(--border);
  border-radius: var(--r-xl);
  overflow: hidden;
  margin-bottom: 1.5rem;
}

.grasp-card {
  background: var(--bg-card);
  padding: 1.5rem;
  transition: background 0.2s;
}

.grasp-card:hover {
  background: var(--bg-card-hover);
}

.grasp-card h3 {
  font-size: 14px;
  font-weight: 700;
  margin-bottom: 0.4rem;
}

.grasp-card p {
  font-size: 12px;
  color: var(--text-secondary);
  line-height: 1.65;
}

.grasp-icon {
  width: 34px;
  height: 34px;
  border-radius: 8px;
  background: rgba(34, 211, 238, 0.08);
  border: 1px solid rgba(34, 211, 238, 0.25);
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: 'JetBrains Mono', monospace;
  font-size: 12px;
  color: var(--teal);
  font-weight: 700;
  margin-bottom: 0.9rem;
}

.grasp-tag {
  display: inline-block;
  margin-top: 0.75rem;
  padding: 2px 9px;
  background: rgba(34, 211, 238, 0.08);
  border-radius: var(--r-pill);
  font-family: 'JetBrains Mono', monospace;
  font-size: 9px;
  color: var(--teal);
}

.pattern-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 1.75rem;
  margin-bottom: 1.25rem;
  transition: all 0.2s;
  position: relative;
  overflow: hidden;
}

.pattern-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 1px;
  opacity: 0;
  transition: opacity 0.3s;
}

.pattern-card:hover {
  background: var(--bg-card-hover);
  border-color: var(--border-hover);
}

.pattern-card:hover::before {
  opacity: 1;
}

.pattern-card.pc-teal::before {
  background: linear-gradient(90deg, transparent, var(--teal), transparent);
}

.pattern-card.pc-amber::before {
  background: linear-gradient(90deg, transparent, var(--amber), transparent);
}

.pattern-card.pc-coral::before {
  background: linear-gradient(90deg, transparent, var(--coral), transparent);
}

.pattern-card.pc-green::before {
  background: linear-gradient(90deg, transparent, var(--green), transparent);
}

.pattern-card.pc-accent::before {
  background: linear-gradient(90deg, transparent, var(--accent-soft), transparent);
}

.pattern-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  margin-bottom: 0.75rem;
  gap: 1rem;
  flex-wrap: wrap;
}

.pattern-title {
  font-size: 16px;
  font-weight: 800;
  letter-spacing: -0.01em;
}

.pattern-badges {
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
}

.pattern-desc {
  font-size: 13px;
  color: var(--text-secondary);
  line-height: 1.75;
  margin-bottom: 1rem;
}

.pattern-when {
  font-family: 'JetBrains Mono', monospace;
  font-size: 11px;
  color: var(--text-muted);
  padding: 8px 12px;
  background: rgba(255, 255, 255, 0.02);
  border-radius: var(--r-sm);
  border-left: 2px solid var(--text-muted);
  line-height: 1.7;
}

/* USER STORIES & ACCEPTANCE CRITERIA */
.us-layout {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.5rem;
  margin-bottom: 2rem;
}

.us-card {
  background: #1a1625;
  border: 1px solid rgba(251, 191, 36, 0.25);
  border-radius: 12px;
  padding: 1.5rem;
}

.us-card .us-meta {
  font-family: 'JetBrains Mono', monospace;
  font-size: 11px;
  color: var(--amber);
  margin-bottom: 1rem;
}

.us-card .us-body {
  font-size: 13.5px;
  line-height: 1.8;
  color: var(--text-secondary);
}

.us-card .us-body strong {
  color: var(--text-primary);
  font-weight: 700;
}

.us-card .us-body em {
  color: var(--accent-soft);
  font-style: normal;
  font-weight: 600;
}

.ac-stack {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.ac-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-left: 3px solid var(--accent);
  border-radius: 0 10px 10px 0;
  padding: 1.25rem 1.5rem;
}

.ac-card.ac-green {
  border-left-color: var(--green);
}

.ac-card.ac-amber {
  border-left-color: var(--amber);
}

.ac-card.ac-coral {
  border-left-color: var(--coral);
}

.ac-title {
  font-size: 13px;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 0.75rem;
  display: flex;
  align-items: center;
  gap: 10px;
}

.ac-row {
  display: flex;
  gap: 8px;
  margin-bottom: 5px;
  font-size: 12.5px;
  line-height: 1.6;
  color: var(--text-secondary);
}

.ac-kw {
  font-weight: 700;
  min-width: 40px;
  flex-shrink: 0;
}

.kw-given {
  color: var(--green);
}

.kw-and {
  color: var(--accent-soft);
}

.kw-when {
  color: var(--amber);
}

.kw-then {
  color: var(--teal);
}

.checklist-box {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 1.5rem;
  margin-top: 1.5rem;
}

.checklist-title {
  font-family: 'JetBrains Mono', monospace;
  font-size: 12px;
  color: var(--accent-soft);
  text-transform: uppercase;
  margin-bottom: 1rem;
}

.check-item {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  padding: 8px 0;
  border-bottom: 1px solid var(--border);
  font-size: 13px;
  color: var(--text-secondary);
}

.check-item:last-child {
  border-bottom: none;
}

.check-box {
  width: 16px;
  height: 16px;
  border-radius: 4px;
  border: 1.5px solid;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  margin-top: 2px;
  font-size: 10px;
  font-weight: 700;
}

.check-box.done {
  border-color: var(--green);
  background: rgba(52, 211, 153, 0.15);
  color: var(--green);
}

.check-box.todo {
  border-color: var(--text-muted);
}

/* DIAGRAMS & TABLE */
.diagram-wrap {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 2rem;
  overflow-x: auto;
  margin: 1.5rem 0;
}

.diagram-wrap svg {
  display: block;
  margin: 0 auto;
}

.tech-table {
  width: 100%;
  border-collapse: collapse;
  margin-top: 1rem;
}

.tech-table th {
  text-align: left;
  font-family: 'JetBrains Mono', monospace;
  font-size: 10px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-muted);
  padding: 10px 14px;
  border-bottom: 1px solid var(--border);
}

.tech-table td {
  padding: 12px 14px;
  font-size: 13px;
  color: var(--text-secondary);
  border-bottom: 1px solid rgba(120, 100, 255, 0.07);
  vertical-align: top;
  line-height: 1.65;
}

.tech-table tr:last-child td {
  border-bottom: none;
}

.tech-table tr:hover td {
  background: rgba(124, 92, 252, 0.04);
}

.tech-table td:first-child {
  color: var(--text-primary);
  font-weight: 600;
  white-space: nowrap;
}

.tech-table td:nth-child(2) {
  font-family: 'JetBrains Mono', monospace;
  font-size: 11px;
}

.tc-creo {
  color: var(--accent-soft) !important;
}

.tc-strut {
  color: var(--teal) !important;
}

.tc-comp {
  color: var(--green) !important;
}

/* PROS/CONS & LAYOUT */
.pros-cons {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
  margin-top: 1.25rem;
}

.pros-cons-box {
  background: var(--bg-card);
  border-radius: var(--r-md);
  padding: 1rem 1.25rem;
  border-left: 3px solid;
}

.pros-cons-box.pro {
  border-color: var(--green);
}

.pros-cons-box.con {
  border-color: var(--coral);
}

.pros-cons-box h5 {
  font-size: 11px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin-bottom: 0.5rem;
}

.pros-cons-box.pro h5 {
  color: var(--green);
}

.pros-cons-box.con h5 {
  color: var(--coral);
}

.pros-cons-box ul {
  list-style: none;
  font-size: 12px;
  color: var(--text-secondary);
  line-height: 2;
}

.pros-cons-box.pro ul li::before {
  content: '+  ';
  color: var(--green);
  font-weight: 700;
}

.pros-cons-box.con ul li::before {
  content: '−  ';
  color: var(--coral);
  font-weight: 700;
}

.two-col {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.5rem;
  align-items: start;
}

.three-col {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
}

/* ── 10. RESPONSIVE (MEDIA QUERIES) ──────────────────────── */

@media (max-width: 900px) {
  /* Su mobile la sidebar scompare, si aprirà solo con toggle JS se lo vuoi implementare nel CSS/JS in modo diverso */
  /* .so-sidebar { display: none; } */
}

@media (max-width: 768px) {
  nav .nav-links {
    display: none;
  }
}

@media (max-width: 500px) {
  nav {
    padding: 0 1.25rem;
  }

  .page-hero {
    padding: 7rem 1.25rem 2rem;
  }

  .content-wrap {
    padding: 2rem 1.25rem;
  }
}

/* ── 5. OVERVIEW CARDS (Per le pagine Indice/Teoria) ─────────────────── */

.hero-title-edids {
  font-size: clamp(2.8rem, 8vw, 6rem);
  font-weight: 900;
  letter-spacing: -0.03em;
  line-height: 1.0;
  margin-bottom: 1.5rem;
  background: linear-gradient(135deg, #f0eeff 0%, #a78bfa 55%, #7c5cfc 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  position: relative;
}

.intro-section {
  max-width: 900px;
  margin: 0 auto;
  padding: 0 2rem;
}

.overview-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 12px;
  margin-bottom: 2rem;
}

.overview-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--r-lg);
  padding: 1.5rem 1.5rem;
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  position: relative;
  overflow: hidden;
  text-decoration: none;
  display: block;
}

.overview-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  border-radius: 2px 2px 0 0;
  opacity: 0.7;
}

/* Micro-interazione freccia */
.overview-card::after {
  content: '→';
  position: absolute;
  bottom: 1.5rem;
  right: 1.5rem;
  font-size: 1.1rem;
  font-family: 'Inter', sans-serif;
  color: var(--text-primary);
  opacity: 0;
  transform: translateX(-10px);
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.overview-card:hover {
  background: var(--bg-card-hover);
  border-color: var(--border-hover);
  transform: translateY(-4px);
  box-shadow: 0 10px 25px -5px rgba(0, 0, 0, 0.5), 0 0 15px 0 rgba(167, 139, 250, 0.1);
}

.overview-card:hover::after {
  opacity: 1;
  transform: translateX(0);
}

.ov-amber::before {
  background: var(--amber);
}

.ov-teal::before {
  background: var(--teal);
}

.ov-green::before {
  background: var(--green);
}

.ov-coral::before {
  background: var(--coral);
}

.ov-purple::before {
  background: var(--accent-soft);
}

.ov-num {
  font-family: 'JetBrains Mono', monospace;
  font-size: 10px;
  color: var(--text-muted);
  letter-spacing: 0.08em;
  margin-bottom: 0.5rem;
}

.ov-title {
  font-size: 15px;
  font-weight: 700;
  margin-bottom: 0.75rem;
  color: var(--text-primary);
  transition: color 0.3s ease;
}

.overview-card:hover .ov-title {
  color: var(--accent-soft);
}

.ov-sub {
  font-size: 13.5px;
  color: var(--text-secondary);
  font-family: 'Inter', sans-serif;
  line-height: 1.5;
  padding-right: 1rem;
}

.divider-label {
  max-width: 900px;
  margin: 0 auto;
  padding: 0 2rem;
  display: flex;
  align-items: center;
  gap: 1rem;
  margin-top: 3rem;
  margin-bottom: 1.5rem;
}

.divider-label span {
  font-family: 'JetBrains Mono', monospace;
  font-size: 11px;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  white-space: nowrap;
}

.divider-label::after {
  content: '';
  flex: 1;
  height: 1px;
  background: var(--border);
}

/* ==========================================================================
   HOMEPAGE & PORTAL SPECIFIC (Migrated from style.css)
   ========================================================================== */

/* Custom Nav for Homepage */
nav.home-nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 2.5rem;
  height: 60px;
  background: rgba(8, 8, 16, 0.9);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border);
}

nav.home-nav .nav-logo {
  font-family: 'JetBrains Mono', monospace;
  font-size: 13px;
  font-weight: 500;
  color: var(--accent-soft);
  letter-spacing: 0.05em;
  text-decoration: none;
}

nav.home-nav .nav-right {
  display: flex;
  align-items: center;
  gap: 1.5rem;
}

nav.home-nav .nav-links {
  display: flex;
  list-style: none;
  gap: 1.5rem;
  margin: 0;
  padding: 0;
}

nav.home-nav .nav-links a {
  font-size: 13px;
  font-weight: 500;
  color: var(--text-secondary);
  transition: color 0.2s;
  text-decoration: none;
}

nav.home-nav .nav-links a:hover {
  color: var(--text-primary);
}

nav.home-nav .nav-badge {
  font-family: 'JetBrains Mono', monospace;
  font-size: 11px;
  color: var(--amber);
  background: rgba(251, 191, 36, 0.08);
  padding: 3px 10px;
  border-radius: var(--r-pill);
  border: 1px solid rgba(251, 191, 36, 0.2);
}

/* Hero for Homepage */
.hero-home {
  max-width: 1100px;
  margin: 0 auto;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 7rem 2rem 4rem;
  position: relative;
}

.hero-home::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image: radial-gradient(circle, rgba(124, 92, 252, 0.05) 1px, transparent 1px);
  background-size: 40px 40px;
  pointer-events: none;
  z-index: -1;
}

.hero-home .hero-glow {
  position: absolute;
  top: 25%;
  left: 50%;
  transform: translateX(-50%);
  width: 600px;
  height: 400px;
  pointer-events: none;
  background: radial-gradient(ellipse, rgba(124, 92, 252, 0.10) 0%, transparent 65%);
}

.hero-home .hero-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 18px;
  background: var(--tag-bg);
  border: 1px solid var(--border-hover);
  border-radius: var(--r-pill);
  font-family: 'JetBrains Mono', monospace;
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--accent-soft);
  margin-bottom: 2rem;
}

.hero-home .hero-eyebrow::before {
  content: '';
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--green);
  box-shadow: 0 0 8px var(--green);
  animation: pulse 2s infinite;
}

@keyframes pulse {

  0%,
  100% {
    opacity: 1;
  }

  50% {
    opacity: 0.3;
  }
}

.hero-home h1 {
  font-size: clamp(2.8rem, 7vw, 5.5rem);
  font-weight: 900;
  letter-spacing: -0.03em;
  line-height: 1.05;
  margin-bottom: 1.25rem;
  background: linear-gradient(135deg, #f0eeff 0%, #a78bfa 50%, #7c5cfc 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-home h1 .word-light {
  color: var(--text-primary);
  -webkit-text-fill-color: initial;
}

.hero-home h1 .word-accent {
  background: linear-gradient(135deg, var(--accent-soft), var(--accent));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-home .hero-greeting {
  font-family: 'JetBrains Mono', monospace;
  font-size: 13px;
  color: var(--text-muted);
  margin-bottom: 0.5rem;
}

.hero-home .hero-sub {
  font-size: 1.05rem;
  color: var(--text-secondary);
  max-width: 500px;
  line-height: 1.8;
  font-weight: 300;
}

.hero-home .hero-cta {
  margin-top: 2rem;
}

.btn-primary {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 24px;
  border-radius: var(--r-md);
  font-size: 13px;
  font-weight: 600;
  transition: all 0.2s;
  text-decoration: none;
  border: none;
  cursor: pointer;
  background: var(--accent);
  color: #fff;
}

.btn-primary:hover {
  background: #9571ff;
  transform: translateY(-1px);
}

.hero-home .scroll-hint {
  position: absolute;
  bottom: 2rem;
  left: 50%;
  transform: translateX(-50%);
  font-family: 'JetBrains Mono', monospace;
  font-size: 10px;
  color: var(--text-muted);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
}

.hero-home .scroll-hint-line {
  width: 1px;
  height: 40px;
  background: linear-gradient(to bottom, var(--accent-soft), transparent);
  animation: scrollLine 2s ease infinite;
}

@keyframes scrollLine {
  0% {
    transform: scaleY(0);
    transform-origin: top;
  }

  50% {
    transform: scaleY(1);
    transform-origin: top;
  }

  51% {
    transform: scaleY(1);
    transform-origin: bottom;
  }

  100% {
    transform: scaleY(0);
    transform-origin: bottom;
  }
}

/* Materie Section & Cards */
.materie-section {
  max-width: 1100px;
  margin: 0 auto;
  padding: 4rem 2rem 6rem;
  border-bottom: none;
}

.section-header {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  margin-bottom: 2rem;
  gap: 1rem;
}

.section-eyebrow {
  font-family: 'JetBrains Mono', monospace;
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--accent-soft);
  margin-bottom: 0.75rem;
  display: flex;
  align-items: center;
  gap: 8px;
}

.section-eyebrow::before {
  content: '';
  width: 20px;
  height: 1px;
  background: var(--accent);
  display: inline-block;
  flex-shrink: 0;
}

.section-title {
  font-size: clamp(1.5rem, 3vw, 2.2rem);
  font-weight: 800;
  letter-spacing: -0.02em;
  line-height: 1.2;
}

.materie-count {
  font-family: 'JetBrains Mono', monospace;
  font-size: 12px;
  color: var(--text-muted);
  padding: 6px 14px;
  border: 1px solid var(--border);
  border-radius: var(--r-pill);
  white-space: nowrap;
}

.materie-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
}

.materia-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 20px;
  padding: 2.25rem;
  display: flex;
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  position: relative;
  overflow: hidden;
  text-decoration: none;
  color: inherit;
}

.materia-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--accent), transparent);
  opacity: 0;
  transition: opacity 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.materia-card:hover {
  background: var(--bg-card-hover);
  border-color: var(--border-hover);
  transform: translateY(-4px);
  box-shadow: 0 10px 25px -5px rgba(0, 0, 0, 0.5), 0 0 20px 0 rgba(167, 139, 250, 0.12);
}

.materia-card:hover::before {
  opacity: 1;
}

.materia-card.featured {
  grid-column: 1 / -1;
  flex-direction: row;
  align-items: stretch;
  gap: 0;
}

.materia-card.featured .featured-left {
  flex: 1;
  padding-right: 2rem;
  display: flex;
  flex-direction: column;
}

.materia-card.featured .featured-right {
  width: 220px;
  flex-shrink: 0;
  border-left: 1px solid var(--border);
  padding-left: 2rem;
  display: flex;
  align-items: center;
}

.materia-card.disabled {
  flex-direction: column;
  opacity: 0.6;
  cursor: not-allowed;
}

.materia-card.disabled:hover {
  transform: none;
  background: var(--bg-card);
  border-color: var(--border);
  box-shadow: none;
}

.featured-stats {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
  width: 100%;
}

.featured-stat {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.featured-stat-label {
  font-family: 'JetBrains Mono', monospace;
  font-size: 10px;
  color: var(--text-muted);
  text-transform: uppercase;
}

.featured-stat-value {
  font-size: 12px;
  color: var(--text-primary);
  font-weight: 500;
}

.card-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 1.25rem;
}

.card-sigla {
  font-family: 'JetBrains Mono', monospace;
  font-size: 11px;
  color: var(--text-muted);
  margin-bottom: 0.5rem;
  text-transform: uppercase;
}

.materia-card .card-title {
  font-size: 1.35rem;
  font-weight: 800;
  margin-bottom: 0.75rem;
}

.card-desc {
  font-size: 13.5px;
  color: var(--text-secondary);
  line-height: 1.7;
  margin-bottom: 1.5rem;
  font-family: 'Inter', sans-serif;
}

.card-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-bottom: 1.5rem;
}

.card-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-top: auto;
}

.card-meta {
  font-family: 'JetBrains Mono', monospace;
  font-size: 11px;
  color: var(--text-muted);
}

.card-arrow {
  font-size: 16px;
  color: var(--text-muted);
  transition: transform 0.2s;
}

.materia-card:hover .card-arrow {
  transform: translateX(4px);
  color: var(--text-primary);
}

.card-status {
  font-family: 'JetBrains Mono', monospace;
  font-size: 10px;
  font-weight: 600;
  padding: 3px 10px;
  border-radius: var(--r-pill);
}

.status-active {
  background: rgba(52, 211, 153, 0.10);
  color: var(--green);
}

.status-soon {
  background: rgba(90, 80, 128, 0.20);
  color: var(--text-muted);
}

.card-icon,
.card-icon-big {
  width: 36px;
  height: 36px;
  border-radius: var(--r-md);
  font-size: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: 'JetBrains Mono', monospace;
  font-weight: 700;
  flex-shrink: 0;
}

.icon-purple {
  background: rgba(124, 92, 252, 0.12);
  color: var(--accent-soft);
}

.icon-teal {
  background: rgba(34, 211, 238, 0.10);
  color: var(--teal);
}

.icon-amber {
  background: rgba(251, 191, 36, 0.10);
  color: var(--amber);
}

.icon-coral {
  background: rgba(248, 113, 113, 0.10);
  color: var(--coral);
}

.home-footer {
  border-top: 1px solid var(--border);
  padding: 2rem;
  text-align: center;
}

.home-footer p {
  font-size: 12px;
  color: var(--text-muted);
  font-family: 'JetBrains Mono', monospace;
  line-height: 2;
  margin-bottom: 0;
}

.home-footer a {
  color: var(--accent-soft);
  text-decoration: none;
}

.home-footer a:hover {
  text-decoration: underline;
}

@media (max-width: 900px) {
  .materie-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .materia-card.featured {
    grid-column: 1 / -1;
    flex-direction: column;
  }

  .materia-card.featured .featured-right {
    width: 100%;
    border-left: none;
    border-top: 1px solid var(--border);
    padding-left: 0;
    padding-top: 1.5rem;
  }

  .materia-card.featured .featured-left {
    padding-right: 0;
  }

  nav.home-nav .nav-links,
  nav.home-nav .nav-badge {
    display: none;
  }
}

@media (max-width: 600px) {
  .materie-grid {
    grid-template-columns: 1fr;
  }
}

.tag {
  font-family: 'JetBrains Mono', monospace;
  font-size: 10px;
  padding: 2px 8px;
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--border);
  border-radius: 4px;
  color: var(--text-secondary);
  display: inline-block;
  transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
  cursor: default;
}

.tag:hover {
  transform: translateY(-2px);
  background: var(--tag-bg);
  border-color: var(--accent-soft);
  color: var(--text-primary);
  box-shadow: 0 4px 12px rgba(124, 92, 252, 0.15);
}

/* ==========================================================================
   CYBERPUNK NEON EFFECTS (Homepage JS + CSS)
   ========================================================================== */

/* 1. Terminal Cursor */
.cursor-blink {
  animation: blink 1s step-end infinite;
  color: var(--accent-soft);
}

@keyframes blink {
  50% {
    opacity: 0;
  }
}

/* 2. Soft Neon Pulse on Hover */
.word-accent {
  display: inline-block;
  position: relative;
  transition: all 0.4s ease;
}

.word-accent:hover {
  transform: scale(1.02);
  filter: drop-shadow(0 0 15px rgba(124, 92, 252, 0.4));
}

/* 3. Neon Spotlight on Cards */
.materia-card::after {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(400px circle at var(--mouse-x, -500px) var(--mouse-y, -500px), rgba(124, 92, 252, 0.15), transparent 40%);
  opacity: 0;
  transition: opacity 0.3s;
  pointer-events: none;
  z-index: 2;
  border-radius: inherit;
}

.materia-card:hover::after {
  opacity: 1;
}

/* 4. Animated Gradient Border on Featured Card */
.materia-card.featured::before {
  content: '';
  position: absolute;
  inset: 0;
  height: auto;
  background: linear-gradient(90deg, var(--border), var(--accent), var(--border), var(--teal), var(--border));
  background-size: 300% 100%;
  animation: rgbBorder 6s linear infinite;
  border-radius: inherit;
  opacity: 0.4;
  z-index: -1;
  padding: 1px;
  -webkit-mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
  -webkit-mask-composite: xor;
  mask-composite: exclude;
}

@keyframes rgbBorder {
  0% {
    background-position: 0% 50%;
  }

  100% {
    background-position: 300% 50%;
  }
}

/* 5. Scroll Reveal Effect */
.js-reveal {
  opacity: 0;
  transform: translateY(30px);
}

.js-reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
  transition: opacity 0.6s cubic-bezier(0.2, 1, 0.3, 1), transform 0.6s cubic-bezier(0.2, 1, 0.3, 1);
}

/* Evita di rompere l'hover originale delle card quando sono visibili */
.materia-card.js-reveal.is-visible:hover,
.section-card.js-reveal.is-visible:hover,
.overview-card.js-reveal.is-visible:hover {
  transform: translateY(-4px);
}

/* 6. Hero Staggered Entrance Animation (Cinematic Unblur) */
.hero .breadcrumb {
  opacity: 0;
  animation: fadeUpBlur 1.2s cubic-bezier(0.2, 1, 0.3, 1) forwards 0.05s;
}

.hero-home .hero-eyebrow,
.hero .hero-eyebrow {
  opacity: 0;
  animation: fadeUpBlur 1.2s cubic-bezier(0.2, 1, 0.3, 1) forwards 0.1s;
}

.hero .topic-num {
  opacity: 0;
  animation: fadeUpBlur 1.2s cubic-bezier(0.2, 1, 0.3, 1) forwards 0.2s;
}

.hero-home h1,
.hero h1 {
  opacity: 0;
  animation: fadeUpBlur 1.2s cubic-bezier(0.2, 1, 0.3, 1) forwards 0.3s;
}

.hero-home .hero-sub,
.hero .hero-sub {
  opacity: 0;
  animation: fadeUpBlur 1.2s cubic-bezier(0.2, 1, 0.3, 1) forwards 0.4s;
}

.hero-home .hero-cta,
.hero .hero-cta {
  opacity: 0;
  animation: fadeUpBlur 1.2s cubic-bezier(0.2, 1, 0.3, 1) forwards 0.5s;
}

@keyframes fadeUpBlur {
  0% {
    opacity: 0;
    transform: translateY(30px);
    filter: blur(12px);
  }

  100% {
    opacity: 1;
    transform: translateY(0);
    filter: blur(0);
  }
}

/* 7. Neon Glow & Text Color Overrides */
.hero-home h1,
.hero h1,
.page-hero h1 {
  filter: drop-shadow(0 0 35px rgba(124, 92, 252, 0.45));
}

a.section-card h2,
a.materia-card h2,
a.materia-card .card-title,
a.overview-card h3 {
  color: var(--text-primary) !important;
}

/* ==========================================================================
   16. EXAMPLES BLOCK & VS ROW
   ========================================================================== */
.examples-block {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

.example-item {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-left: 3px solid var(--accent-soft);
  border-radius: var(--r-md);
  padding: 1.25rem 1.5rem;
  transition: all 0.2s;
}

.example-item:hover {
  background: var(--bg-card-hover);
  border-color: var(--border-hover);
}

.example-label {
  font-family: 'JetBrains Mono', monospace;
  font-size: 11px;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 0.5rem;
  font-weight: 600;
}

.example-item p {
  font-size: 13.5px;
  color: var(--text-secondary);
  line-height: 1.7;
  margin: 0;
}

.example-item p code {
  color: var(--teal);
  font-family: 'JetBrains Mono', monospace;
  font-size: 11px;
}

/* VS Row */
.vs-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.25rem;
  margin-top: 1rem;
}

.vs-box {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--r-md);
  padding: 1.5rem;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  transition: all 0.2s;
}

.vs-box:hover {
  background: var(--bg-card-hover);
}

.vs-bad {
  border-top: 3px solid var(--coral);
}

.vs-good {
  border-top: 3px solid var(--green);
}

.vs-label {
  font-family: 'JetBrains Mono', monospace;
  font-size: 13px;
  font-weight: 700;
  display: flex;
  align-items: center;
  gap: 8px;
}

.vs-bad .vs-label {
  color: var(--coral);
}

.vs-good .vs-label {
  color: var(--green);
}

/* VS Diagram Visual Boxes (per confronti visivi con diagrammi Mermaid) */
.vs-diagram-row {
  display: flex;
  gap: 1rem;
  align-items: stretch;
  flex-wrap: wrap;
}

.vs-diagram-box {
  flex: 1;
  min-width: 250px;
  padding: 1.25rem;
  border-radius: var(--r-md);
  display: flex;
  flex-direction: column;
}

.vs-diagram-bad {
  background: rgba(248, 113, 113, 0.05); /* coral */
  border: 1px solid rgba(248, 113, 113, 0.15);
}
.vs-diagram-bad .vs-diagram-title {
  color: var(--coral);
}

.vs-diagram-good {
  background: rgba(52, 211, 153, 0.05); /* emerald */
  border: 1px solid rgba(52, 211, 153, 0.15);
}
.vs-diagram-good .vs-diagram-title {
  color: var(--green);
}

.vs-diagram-title {
  margin-top: 0;
  font-size: 0.85rem;
  text-align: center;
  font-weight: 700;
  margin-bottom: 1rem;
}

.vs-diagram-desc {
  font-size: 0.85rem;
  margin-bottom: 1rem;
  color: var(--text-secondary);
  line-height: 1.6;
}

.vs-diagram-mermaid {
  background: transparent;
  margin: 0;
  display: flex;
  justify-content: center;
}

.vs-box p {
  font-size: 13px;
  color: var(--text-secondary);
  line-height: 1.7;
  margin: 0;
}

.vs-box p code {
  color: var(--accent-soft);
  font-family: 'JetBrains Mono', monospace;
  font-size: 11px;
}

@media (max-width: 768px) {
  .vs-row {
    grid-template-columns: 1fr;
  }
}

/* -- 9. RETRO-COMPATIBILITA' (05-modellazione-design.html) -- */
.section-intro {
  color: var(--text-secondary);
  font-size: 1.05rem;
  line-height: 1.7;
  margin-bottom: 2rem;
}

.eyebrow {
  color: var(--kk-primary);
  font-size: 0.85rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 1px;
  margin-bottom: 0.5rem;
}

.principle-link {
  margin-top: 2rem;
  padding: 1.25rem;
  background: rgba(var(--kk-rgb), 0.05);
  border-left: 3px solid var(--kk-primary);
  color: var(--text-secondary);
  font-size: 0.95rem;
  line-height: 1.6;
  border-radius: 0 var(--r-md) var(--r-md) 0;
}

.grasp-card h3 {
  color: var(--text-primary);
}

.grasp-card h3::before {
  content: '';
  /* Remove any default if there was */
}

/* Colora l'h3 della card con un colore primario per evitare il bianco puro che stona */
.grasp-card .card-head h3 {
  color: var(--text-primary);
  font-weight: 600;
}

.grasp-card .card-head {
  display: flex;
  align-items: center;
  gap: 1rem;
  margin-bottom: 1rem;
}

.grasp-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--r-lg);
  padding: 1.5rem;
}

/* -- 10. DIAGRAMMI DI PROCESSO E FLUSSI -- */
.kk-process-panel {
  display: flex;
  flex-direction: column;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--r-lg);
  margin: 2rem 0;
  padding: 2rem;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
}

@media (min-width: 768px) {
  .kk-process-panel {
    flex-direction: row;
    align-items: stretch;
    justify-content: space-between;
  }
}

.kk-process-col {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
}

.kk-process-title {
  font-family: 'Inter', sans-serif;
  font-weight: 600;
  font-size: 1.1rem;
  color: var(--text-primary);
  margin-bottom: 2.5rem;
  text-align: center;
}

.kk-process-divider {
  width: 100%;
  height: 1px;
  background: var(--border);
  margin: 2rem 0;
}

@media (min-width: 768px) {
  .kk-process-divider {
    width: 1px;
    height: auto;
    margin: 0 2rem;
  }
}

/* Linear Flow (es. Waterfall) */
.kk-linear-flow {
  display: flex;
  flex-direction: column;
  gap: 12px;
  align-items: flex-start;
}

.kk-step {
  background: #2b3553;
  color: #fff;
  font-family: 'Inter', sans-serif;
  font-size: 0.9rem;
  font-weight: 500;
  padding: 8px 0;
  width: 140px;
  text-align: center;
  border-radius: var(--r-sm);
  position: relative;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
  border: 1px solid rgba(255, 255, 255, 0.05);
  transition: transform 0.2s;

  /* Uso di variabili CSS per l'indentazione progressiva, senza hardcodare l'N-esimo elemento! */
  margin-left: calc(var(--step, 0) * 20px);
}

.kk-step:hover {
  transform: translateY(-2px);
  background: #344063;
}

.kk-step:not(:last-child)::after {
  content: '\F133';
  /* arrow-down-right in bootstrap-icons */
  font-family: 'bootstrap-icons';
  position: absolute;
  top: 100%;
  right: -10px;
  color: rgba(255, 255, 255, 0.2);
  font-size: 1.2rem;
  transform: translateY(-4px);
}

/* Cyclic Flow (es. Agile Sprints) */
.kk-cyclic-flow {
  display: flex;
  flex-direction: row;
  align-items: center;
  gap: 20px;
  margin-top: 1rem;
}

.kk-cycle {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 16px;
  position: relative;
}

.kk-cycle-label {
  font-family: 'Inter', sans-serif;
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--text-primary);
}

.kk-cycle-ring {
  width: 60px;
  height: 60px;
  border-radius: 50%;
  border: 4px solid rgba(124, 92, 252, 0.3);
  position: relative;
}

.kk-cycle-ring::after {
  content: '';
  position: absolute;
  top: -8px;
  left: 50%;
  transform: translateX(-50%);
  border: 6px solid transparent;
  border-left-color: rgba(124, 92, 252, 0.4);
}

.kk-cycle-arrow {
  position: absolute;
  right: -24px;
  top: 22px;
  color: rgba(255, 255, 255, 0.2);
  font-size: 1.2rem;
}

/* Active State for Cycles */
.kk-cycle.active .kk-cycle-ring {
  border-color: var(--accent);
  box-shadow: 0 0 15px rgba(124, 92, 252, 0.4), inset 0 0 15px rgba(124, 92, 252, 0.2);
}

.kk-cycle.active .kk-cycle-ring::after {
  border-left-color: var(--accent);
}

.kk-cycle-badge {
  position: absolute;
  top: 30px;
  left: 50%;
  transform: translate(-50%, -50%);
  background: var(--green);
  color: #111;
  font-family: 'Inter', sans-serif;
  font-weight: 700;
  font-size: 0.8rem;
  padding: 4px 12px;
  border-radius: 20px;
  box-shadow: 0 0 15px rgba(52, 211, 153, 0.4);
  z-index: 2;
}

@media (max-width: 768px) {
  .kk-cyclic-flow {
    flex-direction: column;
    gap: 30px;
  }

  .kk-cycle-arrow {
    right: auto;
    bottom: -28px;
    top: auto;
    transform: rotate(90deg);
  }
}

/* -- 11. FEATURE CARDS (Griglia a schede) -- */
.kk-feature-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1.5rem;
  margin: 2rem 0;
}

.kk-feature-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--r-lg);
  padding: 1.5rem;
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
  display: flex;
  flex-direction: column;
  gap: 0.8rem;
}

.kk-feature-icon {
  font-size: 1.8rem;
  color: var(--kk-primary);
  /* Usa il colore del tema attivo */
  margin-bottom: 0.5rem;
}

.kk-feature-title {
  font-family: 'Inter', sans-serif;
  font-weight: 600;
  font-size: 1.1rem;
  color: var(--text-primary);
}

.kk-feature-desc {
  font-size: 0.95rem;
  color: var(--text-secondary);
  line-height: 1.5;
}

/* -- 12. RAM ANIMATION (Waterfall vs Agile) -- */
.kk-ram-board {
  display: flex;
  flex-direction: column;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--r-lg);
  margin: 2rem 0;
  padding: 2rem;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
  gap: 2rem;
}

@media (min-width: 900px) {
  .kk-ram-board {
    flex-direction: row;
    gap: 3rem;
  }
}

.kk-ram-col {
  flex: 1;
  display: flex;
  flex-direction: column;
}

.kk-ram-col-title {
  font-family: 'Inter', sans-serif;
  font-weight: 700;
  font-size: 1.2rem;
  color: var(--text-primary);
  margin-bottom: 1.5rem;
  text-align: center;
  border-bottom: 1px solid rgba(255, 255, 255, 0.05);
  padding-bottom: 1rem;
}

.kk-ram-container {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.kk-ram-slot {
  position: relative;
  background: #0b1121;
  border: 1px solid #1e293b;
  border-radius: 6px;
  padding: 10px 14px;
  display: flex;
  align-items: center;
  gap: 10px;
  box-shadow: inset 0 2px 10px rgba(0, 0, 0, 0.5);
}

/* Gold pins (Stile Cyberpunk/Hardware) */
.kk-ram-slot::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 10%;
  right: 10%;
  height: 4px;
  background: repeating-linear-gradient(
    90deg,
    #fbbf24,
    #fbbf24 3px,
    transparent 3px,
    transparent 6px
  );
  border-radius: 0 0 2px 2px;
  opacity: 0.6;
}

.kk-ram-label {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.7rem;
  color: #64748b;
  writing-mode: vertical-rl;
  transform: rotate(180deg);
  font-weight: 700;
  letter-spacing: 1px;
}

.kk-ram-chips {
  flex: 1;
  display: flex;
  gap: 8px;
}

.kk-ram-chip {
  flex: 1;
  height: 28px;
  background: #1e293b;
  border-radius: 3px;
  border: 1px solid #334155;
  opacity: 0.2;
  position: relative;
  overflow: hidden;
}

/* Animazione "Onda di Energia" */
.kk-ram-chip[data-anim] {
  animation: ramWave 10s infinite;
  animation-delay: var(--delay, 0s);
}

@keyframes ramWave {
  0%, 5% {
    background: #1e293b;
    border-color: #334155;
    opacity: 0.2;
    box-shadow: none;
  }
  15%, 35% {
    background: var(--chip-color);
    border-color: var(--chip-color);
    opacity: 1;
    box-shadow: 0 0 15px var(--chip-color), inset 0 0 8px rgba(255, 255, 255, 0.5);
  }
  45%, 100% {
    background: #1e293b;
    border-color: #334155;
    opacity: 0.2;
    box-shadow: none;
  }
}

/* Colori semantici dei chip */
.chip-req { --chip-color: var(--teal); }
.chip-des { --chip-color: var(--amber); }
.chip-dev { --chip-color: var(--accent); }
.chip-tst { --chip-color: var(--green); }

/* Legenda dei colori */
.kk-ram-legend {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 15px;
  margin-top: 2rem;
  font-size: 0.85rem;
  color: var(--text-secondary);
}

.kk-ram-legend-item {
  display: flex;
  align-items: center;
  gap: 6px;
}

.kk-ram-legend-color {
  width: 14px;
  height: 14px;
  border-radius: 3px;
}

.kk-letter-badge {
  background: rgba(var(--card-rgb, 34, 211, 238), 0.1);
  color: var(--card-color, var(--teal));
  font-size: 1.5rem;
  font-weight: 800;
  font-family: 'JetBrains Mono', monospace;
  width: 44px;
  height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 8px;
  box-shadow: 0 0 12px rgba(var(--card-rgb, 34, 211, 238), 0.2);
}/* ==========================================================================
   CARDS HUB INDEX (Restored)
   ========================================================================== */

a.section-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--r-2xl);
  padding: 2.25rem;
  text-decoration: none;
  color: inherit;
  display: flex;
  flex-direction: column;
  transition: all 0.25s ease;
  position: relative;
  overflow: hidden;
}
a.section-card:hover { 
  background: var(--bg-card-hover); 
  border-color: var(--border-hover); 
  transform: translateY(-4px); 
}
.card-number {
  font-family: 'JetBrains Mono', monospace;
  font-size: 12px;
  color: var(--text-secondary);
  margin-bottom: 1.2rem;
}
.card-icon-big {
  width: 44px; height: 44px;
  border-radius: var(--r-md);
  border: 1px solid var(--border-hover);
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: 'JetBrains Mono', monospace;
  font-size: 14px;
  font-weight: 700;
  margin-bottom: 1.5rem;
}
a.section-card h2 {
  font-size: 1.5rem !important;
  font-weight: 700;
  color: var(--text-primary) !important;
  margin-bottom: 1.5rem;
}
.card-topics {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  margin-bottom: 2.5rem;
  flex-grow: 1;
}
.topic-item {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  color: var(--text-secondary);
  font-size: 14px;
}
.topic-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--accent);
  flex-shrink: 0;
  box-shadow: 0 0 5px var(--accent);
}
.topic-dot.teal {
  background: var(--teal);
  box-shadow: 0 0 5px var(--teal);
}
.card-cta {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.6rem 1.2rem;
  border-radius: var(--r-md);
  font-size: 13px;
  font-family: 'Inter', sans-serif;
  font-weight: 600;
  color: white !important;
  width: max-content;
  transition: opacity 0.2s;
  text-decoration: none;
}
.card-cta:hover {
  opacity: 0.9;
}
.cta-purple {
  background: var(--accent);
  box-shadow: 0 4px 15px -2px rgba(124, 92, 252, 0.4);
}
.cta-teal {
  background: var(--teal);
  color: #080810 !important;
  box-shadow: 0 4px 15px -2px rgba(34, 211, 238, 0.4);
}
.cards-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(380px, 1fr));
  gap: 1.5rem;
}

/* ── COMPONENTI ANIMAZIONI P5.js ─────────────────────── */
#p5-sim-container, #p5-process-container, #FCFS-example-animation {
  display: flex;
  justify-content: center;
  margin: 2rem 0;
  border-radius: 12px;
  overflow: hidden;
  border: 1px solid var(--border);
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.5);
  background: #05050a;
}

.sim-controls, .process-controls {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  justify-content: center;
  margin-bottom: 2rem;
}

/* ==================== DYNAMIC INDEX ENGINE ==================== */
/* ── Accordion ───────────────────────────────────────────── */
.accordion { display: flex; flex-direction: column; gap: 8px; }

.acc-item {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--r-lg);
  overflow: hidden;
  transition: border-color 0.2s;
}
.acc-item.open { border-color: var(--border-hover); }

.acc-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1rem 1.5rem;
  cursor: pointer;
  user-select: none;
  transition: background 0.2s;
  gap: 1rem;
}
.acc-header:hover { background: var(--bg-card-hover); }

.acc-left { display: flex; align-items: center; gap: 1rem; }

.acc-num {
  font-family: 'JetBrains Mono', monospace;
  font-size: 11px;
  color: var(--text-muted);
  min-width: 28px;
  letter-spacing: 0.04em;
}
.acc-title { font-size: 14px; font-weight: 700; }
.acc-count {
  font-family: 'JetBrains Mono', monospace;
  font-size: 10px;
  color: var(--text-muted);
  padding: 2px 8px;
  border: 1px solid var(--border);
  border-radius: var(--r-pill);
  letter-spacing: 0.04em;
  white-space: nowrap;
}

.acc-chevron {
  font-size: 12px;
  color: var(--text-muted);
  transition: transform 0.25s ease;
  flex-shrink: 0;
}
.acc-item.open .acc-chevron { transform: rotate(180deg); color: var(--accent-soft); }

.acc-body {
  display: none;
  padding: 0 1.5rem 1.5rem;
  border-top: 1px solid var(--border);
}
.acc-item.open .acc-body { display: block; }

/* Sub-items inside accordion */
.sub-list {
  display: flex;
  flex-direction: column;
  gap: 0;
  padding-top: 0.5rem;
}
.sub-item {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 10px 0;
  border-bottom: 1px solid rgba(120,100,255,0.07);
}
.sub-item:last-child { border-bottom: none; }
.sub-dot {
  width: 5px; height: 5px;
  border-radius: 50%;
  background: var(--accent-soft);
  flex-shrink: 0;
  margin-top: 6px;
}
.sub-dot.teal   { background: var(--teal); }
.sub-dot.green  { background: var(--green); }
.sub-dot.amber  { background: var(--amber); }
.sub-dot.coral  { background: var(--coral); }
.sub-title { font-size: 13px; font-weight: 600; color: var(--text-primary); margin-bottom: 3px; }
.sub-desc  { font-size: 12px; color: var(--text-secondary); line-height: 1.6; }

/* ── Stats bar ───────────────────────────────────────────── */
.stats-bar {
  display: flex;
  justify-content: center;
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
  background: rgba(15,15,26,0.6);
}
.stat-item {
  flex: 1;
  max-width: 200px;
  padding: 2rem 1.5rem;
  text-align: center;
  border-right: 1px solid var(--border);
}
.stat-item:last-child { border-right: none; }
.stat-number {
  font-size: 2rem;
  font-weight: 900;
  color: var(--text-primary);
  letter-spacing: -0.03em;
}
.stat-label {
  font-size: 11px;
  color: var(--text-muted);
  margin-top: 4px;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  font-family: 'JetBrains Mono', monospace;
}

/* ── Table ───────────────────────────────────────────────── */
.tech-table { width: 100%; border-collapse: collapse; }
.tech-table th {
  text-align: left;
  font-family: 'JetBrains Mono', monospace;
  font-size: 10px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-muted);
  padding: 10px 14px;
  border-bottom: 1px solid var(--border);
}
.tech-table td {
  padding: 12px 14px;
  font-size: 13px;
  color: var(--text-secondary);
  border-bottom: 1px solid rgba(120,100,255,0.07);
  vertical-align: top;
  line-height: 1.65;
}
.tech-table tr:last-child td { border-bottom: none; }
.tech-table tr:hover td { background: rgba(124,92,252,0.04); }
.tech-table td:first-child { color: var(--text-primary); font-weight: 600; }

/* ── Dividers ────────────────────────────────────────────── */
hr.divider {
  border: none;
  border-top: 1px solid var(--border);
  margin: 0;
}

/* ── Back button row ─────────────────────────────────────── */
.back-btn-wrap {
  max-width: 900px;
  margin: 0 auto;
  padding: 3rem 2rem 4rem;
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
}

/* ── Footer ──────────────────────────────────────────────── */
footer {
  border-top: 1px solid var(--border);
  padding: 2rem;
  text-align: center;
}
footer p {
  font-size: 12px;
  color: var(--text-muted);
  font-family: 'JetBrains Mono', monospace;
  line-height: 2;
}
footer a { color: var(--accent-soft); text-decoration: none; }
footer a:hover { text-decoration: underline; }

/* ── Two-column layout ───────────────────────────────────── */
.two-col {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.5rem;
  align-items: start;
}
.three-col {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
}

/* ── Pattern card ────────────────────────────────────────── */
.pattern-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--r-lg);
  padding: 1.75rem;
  margin-bottom: 1.25rem;
  transition: all 0.2s;
  position: relative;
  overflow: hidden;
}
.pattern-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 1px;
  opacity: 0;
  transition: opacity 0.3s;
}
.pattern-card:hover { background: var(--bg-card-hover); border-color: var(--border-hover); }
.pattern-card:hover::before { opacity: 1; }
.pattern-card.pc-teal::before   { background: linear-gradient(90deg, transparent, var(--teal), transparent); }
.pattern-card.pc-amber::before  { background: linear-gradient(90deg, transparent, var(--amber), transparent); }
.pattern-card.pc-coral::before  { background: linear-gradient(90deg, transparent, var(--coral), transparent); }
.pattern-card.pc-green::before  { background: linear-gradient(90deg, transparent, var(--green), transparent); }
.pattern-card.pc-accent::before { background: linear-gradient(90deg, transparent, var(--accent-soft), transparent); }

.pattern-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  margin-bottom: 0.75rem;
  gap: 1rem;
  flex-wrap: wrap;
}
.pattern-title { font-size: 16px; font-weight: 800; letter-spacing: -0.01em; }
.pattern-badges { display: flex; gap: 6px; flex-wrap: wrap; }
.badge {
  font-family: 'JetBrains Mono', monospace;
  font-size: 9px;
  padding: 3px 9px;
  border-radius: var(--r-pill);
  letter-spacing: 0.04em;
  text-transform: uppercase;
  font-weight: 600;
}
.badge-creo  { background: rgba(124,92,252,0.12); color: var(--accent-soft); border: 1px solid rgba(124,92,252,0.3); }
.badge-strut { background: rgba(34,211,238,0.1);  color: var(--teal);        border: 1px solid rgba(34,211,238,0.3); }
.badge-comp  { background: rgba(52,211,153,0.1);  color: var(--green);       border: 1px solid rgba(52,211,153,0.3); }
.badge-proj  { background: rgba(251,191,36,0.1);  color: var(--amber);       border: 1px solid rgba(251,191,36,0.3); }
.pattern-desc { font-size: 13px; color: var(--text-secondary); line-height: 1.75; margin-bottom: 1rem; }
.pattern-when {
  font-family: 'JetBrains Mono', monospace;
  font-size: 11px;
  color: var(--text-muted);
  padding: 8px 12px;
  background: rgba(255,255,255,0.02);
  border-radius: var(--r-sm);
  border-left: 2px solid var(--text-muted);
  line-height: 1.7;
}

/* ── Responsive ──────────────────────────────────────────── */
@media (max-width: 768px) {
  nav .nav-links { display: none; }
  .two-col   { grid-template-columns: 1fr; }
  .three-col { grid-template-columns: 1fr; }
  .pros-cons { grid-template-columns: 1fr; }
  .stats-bar { flex-wrap: wrap; }
  .stat-item { border-right: none; border-bottom: 1px solid var(--border); }
}
@media (max-width: 500px) {
  nav { padding: 0 1.25rem; }
  .page-hero { padding: 7rem 1.25rem 2rem; }
  .section-wrap { padding: var(--sp-xl) 1.25rem; }
}
/* ==================== INDEX SPECIFIC ==================== */

  /* ── Page-specific overrides ── */
  .nav-logo { color: var(--amber); }
  .nav-back:hover { color: var(--amber); border-color: rgba(251,191,36,0.4); }

  .hero-glow {
    background: radial-gradient(ellipse, rgba(251,191,36,0.07) 0%, transparent 65%);
  }

  /* Hero gradient amber */
  .hero-title-so {
    font-size: clamp(2.8rem, 8vw, 6rem);
    font-weight: 900;
    letter-spacing: -0.03em;
    line-height: 1.0;
    margin-bottom: 1.5rem;
    background: linear-gradient(135deg, #f0eeff 0%, #fbbf24 55%, #f59e0b 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    position: relative;
  }

  /* Tags intro */
  .tags-wrap {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-bottom: 2rem;
  }

  /* Intro paragraph section */
  .intro-section {
    max-width: 900px;
    margin: 0 auto;
    padding: 4rem 2rem 0;
  }

  /* Topic overview grid */
  .overview-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
    gap: 12px;
    margin-bottom: 2rem;
  }

  .overview-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--r-lg);
    padding: 1.25rem 1.5rem;
    transition: all 0.2s;
    position: relative;
    overflow: hidden;
    cursor: default;
  }
  .overview-card::before {
    content: '';
    position: absolute;
    top: 0; left: 0; right: 0;
    height: 2px;
    border-radius: 2px 2px 0 0;
    opacity: 0.7;
  }
  .overview-card:hover { background: var(--bg-card-hover); border-color: var(--border-hover); transform: translateY(-2px); }

  .ov-amber::before  { background: var(--amber); }
  .ov-teal::before   { background: var(--teal); }
  .ov-green::before  { background: var(--green); }
  .ov-coral::before  { background: var(--coral); }
  .ov-purple::before { background: var(--accent-soft); }

  .ov-num {
    font-family: 'JetBrains Mono', monospace;
    font-size: 10px;
    color: var(--text-muted);
    letter-spacing: 0.08em;
    margin-bottom: 0.5rem;
  }
  .ov-title {
    font-size: 14px;
    font-weight: 700;
    margin-bottom: 0.4rem;
    color: var(--text-primary);
  }
  .ov-sub {
    font-size: 11px;
    color: var(--text-muted);
    font-family: 'JetBrains Mono', monospace;
    line-height: 1.6;
  }

  /* Accordions section */
  .acc-section {
    max-width: 900px;
    margin: 0 auto;
    padding: 3rem 2rem 6rem;
  }

  /* Accordion color variants */
  .acc-item.amber-theme { border-color: rgba(251,191,36,0.12); }
  .acc-item.amber-theme.open { border-color: rgba(251,191,36,0.35); }
  .acc-item.amber-theme .acc-header:hover { background: rgba(251,191,36,0.04); }
  .acc-item.amber-theme.open .acc-chevron { color: var(--amber); }
  .acc-item.amber-theme .acc-title { color: var(--text-primary); }

  .acc-item.teal-theme { border-color: rgba(34,211,238,0.12); }
  .acc-item.teal-theme.open { border-color: rgba(34,211,238,0.3); }
  .acc-item.teal-theme .acc-header:hover { background: rgba(34,211,238,0.04); }
  .acc-item.teal-theme.open .acc-chevron { color: var(--teal); }

  .acc-item.green-theme { border-color: rgba(52,211,153,0.12); }
  .acc-item.green-theme.open { border-color: rgba(52,211,153,0.3); }
  .acc-item.green-theme .acc-header:hover { background: rgba(52,211,153,0.03); }
  .acc-item.green-theme.open .acc-chevron { color: var(--green); }

  .acc-item.coral-theme { border-color: rgba(248,113,113,0.12); }
  .acc-item.coral-theme.open { border-color: rgba(248,113,113,0.3); }
  .acc-item.coral-theme .acc-header:hover { background: rgba(248,113,113,0.03); }
  .acc-item.coral-theme.open .acc-chevron { color: var(--coral); }

  .acc-item.purple-theme { border-color: rgba(124,92,252,0.12); }
  .acc-item.purple-theme.open { border-color: rgba(124,92,252,0.35); }
  .acc-item.purple-theme .acc-header:hover { background: rgba(124,92,252,0.04); }
  .acc-item.purple-theme.open .acc-chevron { color: var(--accent-soft); }

  /* Badge colour inside accordion */
  .acc-badge {
    font-family: 'JetBrains Mono', monospace;
    font-size: 9px;
    padding: 2px 8px;
    border-radius: var(--r-pill);
    font-weight: 600;
    letter-spacing: 0.04em;
    text-transform: uppercase;
    flex-shrink: 0;
  }
  .ab-amber  { background: rgba(251,191,36,0.12);  color: var(--amber);       border: 1px solid rgba(251,191,36,0.3); }
  .ab-teal   { background: rgba(34,211,238,0.1);   color: var(--teal);        border: 1px solid rgba(34,211,238,0.3); }
  .ab-green  { background: rgba(52,211,153,0.1);   color: var(--green);       border: 1px solid rgba(52,211,153,0.3); }
  .ab-coral  { background: rgba(248,113,113,0.1);  color: var(--coral);       border: 1px solid rgba(248,113,113,0.3); }
  .ab-purple { background: rgba(124,92,252,0.12);  color: var(--accent-soft); border: 1px solid rgba(124,92,252,0.3); }

  /* Sub-item tag inline */
  .sub-tag {
    display: inline-block;
    font-family: 'JetBrains Mono', monospace;
    font-size: 9px;
    padding: 1px 7px;
    border-radius: var(--r-pill);
    background: rgba(90,80,128,0.2);
    color: var(--text-muted);
    letter-spacing: 0.04em;
    margin-left: 6px;
    vertical-align: middle;
  }

  /* Scroll hint */
  .scroll-hint { animation: fadeInUp 1.5s ease 0.5s both; }
  @keyframes fadeInUp {
    from { opacity:0; transform: translateX(-50%) translateY(10px); }
    to   { opacity:1; transform: translateX(-50%) translateY(0); }
  }

  /* Stats bar amber */
  .stat-number.amber { color: var(--amber); }

  /* Section divider label */
  .divider-label {
    max-width: 900px;
    margin: 0 auto;
    padding: 0 2rem;
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-top: 3rem;
    margin-bottom: 1.5rem;
  }
  .divider-label span {
    font-family: 'JetBrains Mono', monospace;
    font-size: 11px;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.1em;
    white-space: nowrap;
  }
  .divider-label::after {
    content: '';
    flex: 1;
    height: 1px;
    background: var(--border);
  }

  /* Teal section eyebrow override */
  .eyebrow-amber {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    font-family: 'JetBrains Mono', monospace;
    font-size: 11px;
    color: var(--amber);
    text-transform: uppercase;
    letter-spacing: 0.1em;
    margin-bottom: 0.75rem;
  }
  .eyebrow-amber::before { content:''; display:inline-block; width:20px; height:1px; background:var(--amber); }

  /* Hero gradient teal (FCA) */
  .hero-title-fca {
    font-size: clamp(2.8rem, 8vw, 6rem);
    font-weight: 900;
    letter-spacing: -0.03em;
    line-height: 1.0;
    margin-bottom: 1.5rem;
    background: linear-gradient(135deg, #f0eeff 0%, #22d3ee 55%, #06b6d4 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    position: relative;
  }

/* ── KATCHKIT HERO COMPONENTS (DYNAMIC) ── */
.kk-hero {
  position: relative;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  text-align: center;
  padding: 4rem 2rem 2rem;
}
.kk-hero-glow {
  position: absolute;
  top: 50%; left: 50%;
  transform: translate(-50%, -50%);
  width: 100%; height: 100%;
  background: radial-gradient(ellipse, rgba(var(--kk-rgb), 0.08) 0%, transparent 65%);
  z-index: -1;
  pointer-events: none;
}
.kk-hero-eyebrow {
  display: inline-block;
  font-family: 'JetBrains Mono', monospace;
  font-size: 11px;
  font-weight: 600;
  padding: 6px 14px;
  border-radius: 100px;
  border: 1px solid rgba(var(--kk-rgb), 0.3);
  background: rgba(var(--kk-rgb), 0.08);
  color: var(--kk-primary);
  margin-bottom: 1.5rem;
  letter-spacing: 0.05em;
  text-transform: uppercase;
}
.kk-hero-title {
  font-size: clamp(2.8rem, 8vw, 6rem);
  font-weight: 900;
  letter-spacing: -0.03em;
  line-height: 1.1;
  margin-bottom: 1.5rem;
  background: linear-gradient(135deg, #f0eeff 0%, var(--kk-primary) 55%, var(--kk-grad-end) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.kk-hero-sub {
  font-size: 1.15rem;
  color: var(--text-secondary);
  max-width: 650px;
  margin: 0 auto;
  line-height: 1.7;
}

/* ── Simulation Container ── */
.sim-container {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 1.25rem;
  margin-bottom: 2rem;
  width: 100%;
  box-sizing: border-box;
}

/* Su computer/desktop: sfrutta tutto lo spazio orizzontale necessario (breakout a 1040px) */
@media (min-width: 1080px) {
  .sim-container {
    width: 1040px;
    max-width: calc(100vw - 80px);
    position: relative;
    left: 50%;
    transform: translateX(-50%);
  }
}

.sim-header {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-bottom: 1rem;
  text-align: center;
}
.sim-canvas {
  display: flex;
  justify-content: center;
  margin-bottom: 1rem;
  border-radius: 8px;
  overflow: hidden;
  background: rgba(0,0,0,0.5);
  width: 100%;
}

.sim-canvas canvas {
  max-width: 100% !important;
  height: auto !important;
  display: block;
}
.sim-controls {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 0.75rem;
  flex-wrap: wrap;
}
.sim-step-badge {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--teal, #22d3ee);
  background: rgba(34, 211, 238, 0.08);
  border: 1px solid rgba(34, 211, 238, 0.25);
  padding: 0.55rem 0.95rem;
  border-radius: 6px;
  min-width: 96px;
  text-align: center;
  user-select: none;
  letter-spacing: 0.04em;
}
.btn-primary {
  padding: 0.6rem 1.2rem;
  background: var(--kk-primary);
  color: #000;
  border: none;
  border-radius: 6px;
  font-weight: 700;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  transition: opacity 0.2s, transform 0.15s;
}
.btn-primary:hover:not(:disabled) {
  opacity: 0.9;
  transform: translateY(-1px);
}
.btn-secondary {
  padding: 0.6rem 1.2rem;
  background: transparent;
  color: var(--text-secondary);
  border: 1px solid var(--border);
  border-radius: 6px;
  font-weight: 600;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  transition: opacity 0.2s, background 0.2s, color 0.2s;
}
.btn-secondary:hover:not(:disabled) {
  background: rgba(255, 255, 255, 0.06);
  color: var(--text-primary);
}
.btn-primary:disabled,
.btn-secondary:disabled {
  opacity: 0.35;
  cursor: not-allowed;
  pointer-events: none;
}