/* ============================================================
   Le Faremo Sapere — Design System v2
   Basato su You-Lab Design Brief (maggio 2026)
   Palette: Joy + Serenity — nessun nero dominante
   Tipografia: Syne / DM Sans / DM Mono
   ============================================================ */

/* ── Google Fonts ─────────────────────────────────────────── */
@import url('https://fonts.googleapis.com/css2?family=Syne:wght@400;600;700&family=DM+Sans:ital,wght@0,400;0,500;1,400&family=DM+Mono:wght@400&display=swap');

/* ── CSS Custom Properties ────────────────────────────────── */
:root {
  /* Superfici */
  --lfs-bg:           #F7F7F5;   /* bianco-lab caldo — sezioni contenuto */
  --lfs-dark:         #1B3D6B;   /* blu notte — hero, footer, sezioni impatto */
  --lfs-dark-alt:     #243E6B;   /* variante leggermente più chiara per alternanza */
  --lfs-surface:      #FFFFFF;   /* card, modali */

  /* Testo */
  --lfs-text:         #1A1A1A;
  --lfs-text-muted:   #6B6B6B;
  --lfs-text-light:   rgba(255,255,255,0.75);  /* su sfondo dark */
  --lfs-border:       #E2E2DC;

  /* Accenti LFS — gioia + serenità */
  --lfs-amber:        #F2C14E;   /* giallo ambra — spotlight, gioia, CTA primario */
  --lfs-sky:          #5BA3C7;   /* azzurro acciaio — serenità, secondario */
  --lfs-coral:        #E07B54;   /* corallo caldo — energia, ironia, accento */
  --lfs-sage:         #7EAB8A;   /* verde salvia — opzionale, terziario */

  /* Alias di compatibilità (componenti esistenti che usano --lfs-accent / #cc785c) */
  --lfs-accent:       var(--lfs-coral);
  --color-accent:     var(--lfs-coral);

  /* Tipografia */
  --font-display: 'Syne', sans-serif;
  --font-body:    'DM Sans', sans-serif;
  --font-mono:    'DM Mono', monospace;

  /* Layout */
  --max-w:        1200px;
  --px:           5vw;
  --section-py:   100px;
  --radius:       4px;       /* You-Lab: quasi squadrato, tech */
  --radius-pill:  20px;
  --card-gap:     24px;
}

/* ── Reset & Base ─────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; }

html {
  font-size: 16px;
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  background: var(--lfs-bg);
  color: var(--lfs-text);
  font-family: var(--font-body);
  font-weight: 400;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

a { color: inherit; text-decoration: none; }
button { cursor: pointer; }
img, video, svg { max-width: 100%; display: block; }
::selection { background: var(--lfs-coral); color: #fff; }

/* ── Tipografia — Scale ───────────────────────────────────── */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-display);
  font-weight: 700;
  line-height: 1.1;
  margin: 0;
  color: inherit;
}

h1 { font-size: clamp(2.5rem,  5vw, 4rem); }
h2 { font-size: clamp(1.75rem, 3vw, 2.5rem); }
h3 { font-size: clamp(1.25rem, 2vw, 1.75rem); }
h4 { font-size: clamp(1rem,    1.5vw, 1.25rem); font-weight: 600; }

p  { margin: 0; font-family: var(--font-body); }

/* Utility classes tipografiche */
.lfs-h1 { font-family: var(--font-display); font-size: clamp(2.5rem, 5vw, 4rem); font-weight: 700; line-height: 1.1; }
.lfs-h2 { font-family: var(--font-display); font-size: clamp(1.75rem, 3vw, 2.5rem); font-weight: 700; line-height: 1.15; }
.lfs-h3 { font-family: var(--font-display); font-size: clamp(1.25rem, 2vw, 1.75rem); font-weight: 600; line-height: 1.2; }

.lfs-lead {
  font-family: var(--font-body);
  font-size: clamp(1.05rem, 1.5vw, 1.2rem);
  font-weight: 500;
  line-height: 1.55;
}

.lfs-body {
  font-family: var(--font-body);
  font-size: 1rem;
  line-height: 1.65;
}

/* Mono / Eyebrow / Badge label */
.lfs-mono,
.lfs-eyebrow,
.mono-tag {
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 400;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.lfs-eyebrow {
  display: block;
  color: var(--lfs-text-muted);
  margin-bottom: 12px;
}

.lfs-eyebrow--light {
  color: rgba(255,255,255,0.55);
}

/* ── Layout ───────────────────────────────────────────────── */
.lfs-container {
  max-width: var(--max-w);
  margin: 0 auto;
  padding-left: var(--px);
  padding-right: var(--px);
}

.lfs-section {
  padding-top: var(--section-py);
  padding-bottom: var(--section-py);
}

/* Alternanza dark/light — ritmo verticale You-Lab */
.lfs-section--light {
  background: var(--lfs-bg);
  color: var(--lfs-text);
}

.lfs-section--dark {
  background: var(--lfs-dark);
  color: #ffffff;
}

.lfs-section--white {
  background: #ffffff;
  color: var(--lfs-text);
}

/* ── Hero ─────────────────────────────────────────────────── */
.lfs-hero {
  position: relative;
  min-height: 85dvh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  background: var(--lfs-dark);
  color: #ffffff;
  padding: 80px var(--px) 72px;
  overflow: hidden;
}

/* Dot-grid texture — You-Lab signature */
.dot-grid {
  position: absolute;
  inset: 0;
  background-image: radial-gradient(circle, rgba(255,255,255,0.10) 1px, transparent 1px);
  background-size: 28px 28px;
  mask-image: linear-gradient(to bottom, transparent, black 20%, black 80%, transparent);
  -webkit-mask-image: linear-gradient(to bottom, transparent, black 20%, black 80%, transparent);
  pointer-events: none;
}

.lfs-hero-content {
  position: relative;
  z-index: 1;
  max-width: var(--max-w);
  margin: 0 auto;
  width: 100%;
}

.lfs-hero-tagrow {
  position: absolute;
  bottom: 28px;
  left: var(--px);
  right: var(--px);
  z-index: 1;
}

.mono-tag {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.10em;
  text-transform: uppercase;
  opacity: 0.50;
}

/* ── Navbar ───────────────────────────────────────────────── */
.lfs-nav {
  position: sticky;
  top: 0;
  z-index: 100;
  height: 64px;
  display: flex;
  align-items: center;
  padding: 0 var(--px);
  background: transparent;
  transition: background 250ms ease, box-shadow 250ms ease;
}

.lfs-nav--scrolled {
  background: var(--lfs-bg);
  box-shadow: 0 1px 0 var(--lfs-border);
}

.lfs-nav__inner {
  width: 100%;
  max-width: var(--max-w);
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.lfs-nav__logo {
  font-family: var(--font-display);
  font-size: 18px;
  font-weight: 700;
  letter-spacing: -0.01em;
  white-space: nowrap;
}

.lfs-nav__links {
  display: flex;
  gap: 28px;
  list-style: none;
  margin: 0;
  padding: 0;
}

.lfs-nav__links a {
  font-family: var(--font-body);
  font-size: 14px;
  font-weight: 500;
  opacity: 0.70;
  transition: opacity 150ms ease;
}

.lfs-nav__links a:hover,
.lfs-nav__links a[aria-current="page"],
.lfs-nav__links a.active {
  opacity: 1;
}

.lfs-nav__cta {
  flex-shrink: 0;
}

/* ── Buttons ──────────────────────────────────────────────── */
.lfs-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  height: 48px;
  padding: 0 24px;
  border-radius: var(--radius);
  font-family: var(--font-body);
  font-size: 15px;
  font-weight: 500;
  cursor: pointer;
  border: none;
  text-decoration: none;
  transition: transform 150ms ease, box-shadow 150ms ease, opacity 150ms ease;
  white-space: nowrap;
  line-height: 1;
}

.lfs-btn:hover { transform: translateY(-2px); }
.lfs-btn:active { transform: translateY(0); }

/* Primario — ambra, su dark e light */
.lfs-btn--primary {
  background: var(--lfs-amber);
  color: var(--lfs-text);
}
.lfs-btn--primary:hover {
  box-shadow: 0 6px 20px rgba(242, 193, 78, 0.35);
}

/* Secondario — bordo scuro, su bg chiaro */
.lfs-btn--secondary {
  background: transparent;
  color: var(--lfs-text);
  border: 1.5px solid var(--lfs-text);
}
.lfs-btn--secondary:hover {
  box-shadow: 0 4px 12px rgba(0,0,0,0.08);
}

/* Outline chiaro — su sfondo dark */
.lfs-btn--outline-light {
  background: transparent;
  color: #ffffff;
  border: 1.5px solid rgba(255,255,255,0.45);
}
.lfs-btn--outline-light:hover {
  border-color: rgba(255,255,255,0.85);
  box-shadow: 0 4px 16px rgba(0,0,0,0.15);
}

/* Pieno azzurro */
.lfs-btn--sky {
  background: var(--lfs-sky);
  color: #ffffff;
}
.lfs-btn--sky:hover {
  box-shadow: 0 6px 20px rgba(91,163,199,0.35);
}

/* ── Cards ────────────────────────────────────────────────── */
.lfs-card {
  background: var(--lfs-surface);
  border: 1px solid var(--lfs-border);
  border-top: 3px solid var(--lfs-coral);
  border-radius: var(--radius);
  padding: 28px 24px;
  transition: transform 200ms ease, box-shadow 200ms ease;
}

.lfs-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 8px 24px rgba(0,0,0,0.08);
}

/* Varianti border-top */
.lfs-card--amber   { border-top-color: var(--lfs-amber); }
.lfs-card--sky     { border-top-color: var(--lfs-sky); }
.lfs-card--coral   { border-top-color: var(--lfs-coral); }
.lfs-card--dark    { border-top-color: var(--lfs-dark); }
.lfs-card--sage    { border-top-color: var(--lfs-sage); }

/* Card su sfondo dark */
.lfs-card--glass {
  background: rgba(255,255,255,0.06);
  border: 1px solid rgba(255,255,255,0.12);
  border-top: 3px solid var(--lfs-amber);
  color: #ffffff;
}

.lfs-card--glass:hover {
  background: rgba(255,255,255,0.10);
  box-shadow: 0 8px 32px rgba(0,0,0,0.20);
}

/* ── Badge & Pills ────────────────────────────────────────── */
.lfs-badge {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 400;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  padding: 4px 12px;
  border-radius: var(--radius);
  background: var(--lfs-coral);
  color: #ffffff;
  line-height: 1.4;
}

.lfs-badge--amber   { background: var(--lfs-amber);   color: var(--lfs-text); }
.lfs-badge--sky     { background: var(--lfs-sky);     color: #ffffff; }
.lfs-badge--coral   { background: var(--lfs-coral);   color: #ffffff; }
.lfs-badge--dark    { background: var(--lfs-dark);    color: #ffffff; }
.lfs-badge--outline {
  background: transparent;
  color: var(--lfs-text-muted);
  border: 1px solid var(--lfs-border);
}

.lfs-pill {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  padding: 3px 10px;
  border-radius: var(--radius-pill);
  border: 1px solid var(--lfs-border);
  color: var(--lfs-text-muted);
}

/* ── Grid helpers ─────────────────────────────────────────── */
.lfs-grid {
  display: grid;
  gap: var(--card-gap);
}

.lfs-grid--2 { grid-template-columns: repeat(2, 1fr); }
.lfs-grid--3 { grid-template-columns: repeat(3, 1fr); }
.lfs-grid--4 { grid-template-columns: repeat(4, 1fr); }

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

.lfs-divider--light {
  border-top-color: rgba(255,255,255,0.12);
}

/* ── Stat / Counter block ─────────────────────────────────── */
.lfs-stat {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.lfs-stat__value {
  font-family: var(--font-display);
  font-size: clamp(2rem, 4vw, 3.5rem);
  font-weight: 700;
  line-height: 1;
  color: var(--lfs-amber);
}

.lfs-stat__label {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.10em;
  text-transform: uppercase;
  opacity: 0.60;
}

/* ── Animations (anim-hero-item, anim-card) ───────────────── */
/* Le classi .anim-* sono gestite da animations.js */
/* Stato iniziale per prevent FOUC */
.anim-hero-item {
  opacity: 0;
  transform: translateY(20px);
}

.anim-hero-item.is-visible {
  opacity: 1;
  transform: translateY(0);
  transition: opacity 500ms ease, transform 500ms ease;
}

.anim-card {
  opacity: 0;
  transform: translateY(16px);
}

.anim-card.is-visible {
  opacity: 1;
  transform: translateY(0);
  transition: opacity 450ms ease, transform 450ms ease;
}

@media (prefers-reduced-motion: reduce) {
  .anim-hero-item,
  .anim-card {
    opacity: 1 !important;
    transform: none !important;
    transition: none !important;
  }
}

/* ── Responsive ───────────────────────────────────────────── */
@media (max-width: 1024px) {
  .lfs-grid--4 { grid-template-columns: repeat(2, 1fr); }
  .lfs-grid--3 { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 768px) {
  :root {
    --section-py: 64px;
    --card-gap:   16px;
  }

  .lfs-hero { min-height: 70dvh; padding-top: 60px; }
  .lfs-nav__links { display: none; }
  .lfs-grid--2,
  .lfs-grid--3,
  .lfs-grid--4 { grid-template-columns: 1fr; }
}

@media (max-width: 480px) {
  :root { --section-py: 48px; }
}