/* ============================================
   Formazione AI — Landing Page Styles
   Neo-Industrial Solar Design System
   ============================================ */

.fa-container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--space-md);
}

.fa-section-header {
  max-width: 700px;
  margin: 0 auto var(--space-lg);
}

/* --- Badge --- */
.fa-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 500;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--accent);
  background: var(--accent-bg);
  border: 1px solid var(--accent-border);
  padding: 0.4rem 1rem;
  margin-bottom: var(--space-md);
  opacity: 0;
  animation: revealUp 0.5s 0.15s var(--ease-out-expo) forwards;
}

.fa-badge-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--accent);
  animation: pulse-dot 2s ease-in-out infinite;
}

/* --- Hero --- */
.fa-hero {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: var(--header-height) 0 0;
  position: relative;
  overflow: hidden;
  background: var(--bg);
}

.fa-hero-bg {
  position: absolute;
  inset: 0;
  z-index: 0;
}

.fa-hero-bg::after {
  content: '';
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse 80% 60% at 70% 50%, oklch(65% 0.18 75 / 0.06), transparent 60%),
    linear-gradient(to bottom, transparent 0%, var(--bg) 100%);
  pointer-events: none;
}

.fa-hero-canvas {
  width: 100%;
  height: 100%;
  display: block;
}

.fa-hero-inner {
  position: relative;
  z-index: 1;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: var(--space-lg) var(--space-md);
  width: 100%;
  display: grid;
  grid-template-columns: 1.3fr 0.7fr;
  gap: var(--space-lg);
  align-items: center;
}

.fa-hero-title {
  font-family: var(--font-display);
  font-size: clamp(2.8rem, 6.5vw, 5rem);
  font-weight: 200;
  letter-spacing: -0.04em;
  line-height: 0.95;
  margin-bottom: var(--space-md);
  opacity: 0;
  animation: revealUp 0.6s 0.25s var(--ease-out-expo) forwards;
}

.fa-hero-sub {
  font-size: clamp(0.95rem, 1.5vw, 1.15rem);
  font-weight: 300;
  color: var(--text-secondary);
  line-height: 1.7;
  max-width: 520px;
  margin-bottom: var(--space-lg);
  opacity: 0;
  animation: revealUp 0.6s 0.4s var(--ease-out-expo) forwards;
}

.fa-hero-sub strong {
  color: var(--text);
  font-weight: 500;
}

.fa-hero-cta {
  opacity: 0;
  animation: revealUp 0.6s 0.55s var(--ease-out-expo) forwards;
}

.fa-hero-note {
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-top: var(--space-sm);
}

/* --- Hero metrics --- */
.fa-hero-metric {
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
  opacity: 0;
  animation: revealUp 0.6s 0.5s var(--ease-out-expo) forwards;
}

.fa-metric-card {
  padding: var(--space-md);
  border: 1px solid var(--border-light);
  background: var(--surface);
}

.fa-metric-value {
  font-family: var(--font-display);
  font-size: clamp(2rem, 5vw, 4rem);
  font-weight: 100;
  letter-spacing: -0.05em;
  color: var(--accent);
}

.fa-metric-label {
  display: block;
  font-size: 0.75rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-top: 0.5rem;
  line-height: 1.5;
}

.fa-metric-sub {
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-top: 0.2rem;
}

/* --- Social proof bar --- */
.fa-social-proof {
  border-top: 1px solid var(--border-light);
  border-bottom: 1px solid var(--border-light);
  padding: var(--space-sm) 0;
  background: var(--surface);
}

.fa-proof-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--space-md);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-sm);
  flex-wrap: wrap;
  font-size: 0.85rem;
  color: var(--text-muted);
}

.fa-proof-item strong {
  color: var(--text);
}

.fa-proof-sep {
  color: var(--accent);
  opacity: 0.3;
}

/* --- Pain section --- */
.fa-pain {
  padding: var(--space-2xl) 0;
}

.fa-pain-grid {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  gap: 1px;
  background: var(--border-light);
  border: 1px solid var(--border-light);
}

.fa-pain-item {
  padding: var(--space-md);
  background: var(--surface);
  transition: background 0.3s var(--ease-out-quart);
}

.fa-pain-item:hover {
  background: var(--surface-hover);
}

.fa-pain-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border: 1px solid var(--accent-border);
  margin-bottom: var(--space-sm);
  color: var(--accent);
}

.fa-pain-item h3 {
  font-family: var(--font-display);
  font-size: 1.05rem;
  font-weight: 600;
  margin-bottom: 0.4rem;
  color: var(--text);
}

.fa-pain-item p {
  font-size: 0.9rem;
  color: var(--text-secondary);
  line-height: 1.6;
}

/* --- Method section --- */
.fa-method {
  padding: var(--space-2xl) 0;
  background: var(--surface);
}

.fa-method-timeline {
  max-width: 700px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
  position: relative;
}

.fa-method-timeline::before {
  content: '';
  position: absolute;
  left: 28px;
  top: 0;
  bottom: 0;
  width: 1px;
  background: repeating-linear-gradient(
    to bottom,
    var(--accent) 0px,
    var(--accent) 4px,
    transparent 4px,
    transparent 8px
  );
  opacity: 0.3;
}

.fa-method-step {
  display: grid;
  grid-template-columns: 56px 1fr;
  gap: var(--space-md);
  align-items: start;
}

.fa-method-icon {
  width: 56px;
  height: 56px;
  border: 1px solid var(--accent-border);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--accent);
  position: relative;
  z-index: 1;
  background: var(--surface);
}

.fa-method-content h3 {
  font-family: var(--font-display);
  font-size: 1.2rem;
  font-weight: 600;
  margin-bottom: 0.3rem;
}

.fa-method-content p {
  font-size: 0.9rem;
  color: var(--text-secondary);
  line-height: 1.6;
}

.fa-method-tag {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  font-weight: 500;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--accent);
  display: block;
  margin-bottom: 0.3rem;
}

/* --- Pricing --- */
.fa-pricing {
  padding: var(--space-2xl) 0;
}

.fa-pricing-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-sm);
  align-items: stretch;
}

.fa-price-card {
  background: var(--surface);
  border: 1px solid var(--border-light);
  padding: var(--space-md);
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
  position: relative;
  transition: border-color 0.3s var(--ease-out-quart);
}

.fa-price-card:hover {
  border-color: var(--border-hover);
}

.fa-price-card--featured {
  border-color: var(--accent);
  background: oklch(16% 0.01 75);
}

.fa-price-card .btn {
  margin-top: auto;
}

.fa-price-badge {
  position: absolute;
  top: -12px;
  left: var(--space-md);
  font-family: var(--font-mono);
  font-size: 0.7rem;
  font-weight: 600;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  background: var(--accent);
  color: var(--bg);
  padding: 0.25rem 0.75rem;
}

.fa-price-tier {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 500;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-muted);
}

.fa-price-amount {
  display: flex;
  align-items: baseline;
  gap: 0.1em;
}

.fa-price-currency {
  font-family: var(--font-display);
  font-size: 1.2rem;
  font-weight: 400;
  color: var(--text-secondary);
}

.fa-price-value {
  font-family: var(--font-display);
  font-size: clamp(1.8rem, 3vw, 2.8rem);
  font-weight: 200;
  letter-spacing: -0.04em;
  color: var(--text);
}

.fa-price-period {
  font-size: 0.85rem;
  font-weight: 300;
  color: var(--text-muted);
}

.fa-price-desc {
  font-size: 0.8rem;
  color: var(--text-muted);
  line-height: 1.5;
}

.fa-price-features {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  flex-grow: 1;
}

.fa-price-features li {
  font-size: 0.8rem;
  color: var(--text-secondary);
  padding-left: 1.3rem;
  position: relative;
  line-height: 1.5;
}

.fa-price-features li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0.45em;
  width: 7px;
  height: 7px;
  border: 1.5px solid var(--accent);
  border-radius: 50%;
}

.fa-price-card--featured .fa-price-features li::before {
  background: var(--accent);
}

.fa-price-upsell {
  font-size: 0.75rem;
  color: var(--accent);
  font-style: italic;
  border-top: 1px solid var(--border-light);
  padding-top: var(--space-sm);
  margin-top: var(--space-sm);
}

/* --- ROI section --- */
.fa-roi {
  padding: var(--space-2xl) 0;
  background: var(--surface);
}

.fa-roi-note {
  max-width: 700px;
  margin: var(--space-md) auto 0;
  font-size: 0.8rem;
  color: var(--text-muted);
  line-height: 1.6;
  padding: var(--space-sm) var(--space-md);
  border-left: 2px solid var(--accent-border);
}

.fa-roi-table-wrap {
  overflow-x: auto;
  max-width: 900px;
  margin: 0 auto;
}

.fa-roi-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.85rem;
}

.fa-roi-table th,
.fa-roi-table td {
  padding: 0.8rem 1rem;
  text-align: left;
  border-bottom: 1px solid var(--border-light);
}

.fa-roi-table th {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  font-weight: 600;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--text-muted);
  background: var(--bg);
}

.fa-roi-table td {
  color: var(--text-secondary);
}

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

.fa-roi-table .fa-roi-highlight {
  color: var(--accent);
  font-weight: 600;
}

.fa-roi-table .fa-roi-total {
  font-weight: 600;
  color: var(--text);
}

/* --- ROI per livello --- */
.fa-roi-levels {
  max-width: 900px;
  margin: var(--space-lg) auto 0;
}

.fa-roi-levels h3 {
  font-family: var(--font-display);
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: var(--space-sm);
  color: var(--text);
}

.fa-roi-range {
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-bottom: var(--space-md);
}

/* --- Target verticali --- */
.fa-targets {
  padding: var(--space-2xl) 0;
}

.fa-target-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-sm);
}

.fa-target-card {
  padding: var(--space-md);
  border: 1px solid var(--border-light);
  background: var(--surface);
  text-align: center;
  transition: border-color 0.3s var(--ease-out-quart);
}

.fa-target-card:hover {
  border-color: var(--border-hover);
}

.fa-target-icon {
  width: 40px;
  height: 40px;
  margin: 0 auto var(--space-sm);
  color: var(--accent);
}

.fa-target-card h3 {
  font-family: var(--font-display);
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: 0.3rem;
  color: var(--text);
}

.fa-target-card p {
  font-size: 0.8rem;
  color: var(--text-secondary);
  line-height: 1.5;
}

/* --- FAQ --- */
.fa-faq {
  padding: var(--space-2xl) 0;
  background: var(--surface);
}

.fa-faq-list {
  max-width: 700px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
}

.fa-faq-item {
  border-bottom: 1px solid var(--border-light);
}

.fa-faq-item:first-child {
  border-top: 1px solid var(--border-light);
}

.fa-faq-item summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-md);
  padding: var(--space-md) 0;
  cursor: pointer;
  font-weight: 500;
  font-size: 0.95rem;
  color: var(--text);
  list-style: none;
  transition: color 0.2s var(--ease-out-quart);
}

.fa-faq-item summary::-webkit-details-marker { display: none; }
.fa-faq-item summary::marker { display: none; content: ''; }

.fa-faq-item summary:hover { color: var(--accent); }

.fa-faq-toggle {
  font-family: var(--font-mono);
  font-size: 1.2rem;
  color: var(--accent);
  flex-shrink: 0;
  transition: transform 0.3s var(--ease-out-quart);
}

.fa-faq-item[open] .fa-faq-toggle {
  transform: rotate(45deg);
}

.fa-faq-item p {
  padding: 0 0 var(--space-md);
  font-size: 0.9rem;
  color: var(--text-secondary);
  line-height: 1.7;
  max-width: 600px;
}

/* --- CTA --- */
.fa-cta {
  padding: var(--space-2xl) 0;
}

.fa-cta-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-lg);
  align-items: start;
}

.fa-cta-desc {
  font-size: 1.05rem;
  color: var(--text-secondary);
  line-height: 1.7;
  margin: var(--space-md) 0;
  max-width: 440px;
}

/* --- Mobile sticky CTA --- */
.fa-mobile-cta {
  display: none;
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  padding: var(--space-sm) var(--space-md);
  background: var(--bg);
  border-top: 1px solid var(--border-light);
  z-index: 90;
  transform: translateY(100%);
  transition: transform 0.3s var(--ease-out-expo);
}

.fa-mobile-cta.visible {
  transform: translateY(0);
}

/* --- Responsive --- */
@media (max-width: 960px) {
  .fa-hero-inner {
    grid-template-columns: 1fr;
    gap: var(--space-lg);
    padding-top: var(--space-xl);
  }

  .fa-hero-metric {
    flex-direction: row;
    gap: var(--space-md);
  }

  .fa-metric-card {
    flex: 1;
  }

  .fa-pain-grid {
    grid-template-columns: 1fr;
  }

  .fa-pricing-grid {
    grid-template-columns: 1fr 1fr;
  }

  .fa-target-grid {
    grid-template-columns: 1fr 1fr;
  }

  .fa-cta-grid {
    grid-template-columns: 1fr;
  }

  .fa-roi-table-wrap {
    margin: 0 calc(-1 * var(--space-md));
    padding: 0 var(--space-md);
  }
}

@media (max-width: 640px) {
  .fa-hero-title {
    font-size: clamp(2rem, 10vw, 3rem);
  }

  .fa-hero-metric {
    flex-direction: column;
  }

  .fa-pricing-grid {
    grid-template-columns: 1fr;
    max-width: 400px;
    margin: 0 auto;
  }

  .fa-target-grid {
    grid-template-columns: 1fr;
  }

  .fa-method-timeline::before {
    left: 20px;
  }

  .fa-method-step {
    grid-template-columns: 40px 1fr;
  }

  .fa-method-icon {
    width: 40px;
    height: 40px;
  }

  .fa-method-icon svg {
    width: 20px;
    height: 20px;
  }

  .fa-proof-inner {
    flex-direction: column;
    gap: 0.3rem;
  }

  .fa-proof-sep { display: none; }

  .hamburger { display: flex; }

  .nav-links {
    position: fixed;
    top: 0;
    right: -100%;
    width: 280px;
    height: 100vh;
    flex-direction: column;
    justify-content: center;
    gap: var(--space-lg);
    background: var(--surface);
    border-left: 1px solid var(--border);
    padding: var(--space-xl);
    transition: right 0.3s var(--ease-out-expo);
    z-index: 100;
  }

  .nav-links.open { right: 0; }

  .nav-links a:not(.btn) { display: block; font-size: 1.1rem; }

  .fa-mobile-cta { display: block; }
}