/**
 * ELIO SOLAR - COMPARISON SECTION (SODIUM VS LITHIUM)
 * Visual comparison between sodium and lithium batteries
 * Version: 1.0
 */

/* ============================================
   CSS CUSTOM PROPERTIES
   ============================================ */

:root {
  /* Comparison Container */
  --comparison-padding: 80px;
  --comparison-padding-mobile: 60px;
  --comparison-bg: #f8fafc;
  --comparison-max-width: 1200px;

  /* Comparison Cards */
  --card-sodium-gradient: linear-gradient(135deg, #10b981 0%, #059669 100%);
  --card-lithium-gradient: linear-gradient(135deg, #ef4444 0%, #dc2626 100%);
  --card-shadow: 0 20px 60px rgba(0, 0, 0, 0.15);
  --card-border-radius: 24px;
  --card-padding: 40px;

  /* VS Badge */
  --vs-badge-size: 80px;
  --vs-badge-bg: linear-gradient(135deg, #3b82f6 0%, #2563eb 100%);
  --vs-badge-shadow: 0 8px 32px rgba(59, 130, 246, 0.4);

  /* Feature Icons */
  --feature-icon-size: 48px;
  --feature-spacing: 24px;
}

/* ============================================
   COMPARISON CONTAINER
   ============================================ */

.comparison-sodium {
  background: var(--comparison-bg);
  padding: var(--comparison-padding) 32px;
  position: relative;
  overflow: hidden;
}

.comparison-container {
  max-width: var(--comparison-max-width);
  margin: 0 auto;
}

/* ============================================
   SECTION HEADER
   ============================================ */

.comparison-header {
  text-align: center;
  margin-bottom: 64px;
}

.comparison-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 20px;
  background: linear-gradient(135deg, #3b82f6 0%, #2563eb 100%);
  color: white;
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  border-radius: 24px;
  margin-bottom: 20px;
  box-shadow: 0 4px 16px rgba(59, 130, 246, 0.3);
}

.comparison-title {
  font-family: 'Plus Jakarta Sans', 'Inter', sans-serif;
  font-size: 42px;
  font-weight: 800;
  line-height: 1.2;
  letter-spacing: -0.02em;
  color: #0f172a;
  margin: 0 0 16px 0;
}

.comparison-subtitle {
  font-size: 18px;
  color: #64748b;
  margin: 0;
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
}

/* ============================================
   COMPARISON GRID
   ============================================ */

.comparison-grid {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  gap: 40px;
  align-items: start;
  position: relative;
}

/* ============================================
   COMPARISON CARDS (SODIUM & LITHIUM)
   ============================================ */

.comparison-card {
  background: white;
  border-radius: var(--card-border-radius);
  padding: var(--card-padding);
  box-shadow: var(--card-shadow);
  position: relative;
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.comparison-card:hover {
  transform: translateY(-8px);
  box-shadow: 0 24px 80px rgba(0, 0, 0, 0.2);
}

/* Sodium Card (Winner) */
.comparison-card--sodium {
  border: 3px solid #10b981;
  z-index: 2;
}

.comparison-card--sodium::before {
  content: '✨ SCELTA CONSIGLIATA';
  position: absolute;
  top: -16px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--card-sodium-gradient);
  color: white;
  padding: 8px 24px;
  border-radius: 24px;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.05em;
  box-shadow: 0 4px 16px rgba(16, 185, 129, 0.4);
  white-space: nowrap;
}

/* Lithium Card */
.comparison-card--lithium {
  border: 2px solid #e5e7eb;
  opacity: 0.9;
}

/* Card Header */
.comparison-card-header {
  text-align: center;
  margin-bottom: 32px;
  padding-bottom: 24px;
  border-bottom: 2px solid #f1f5f9;
}

.comparison-card-icon {
  width: 80px;
  height: 80px;
  margin: 0 auto 20px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 48px;
  border-radius: 50%;
  background: linear-gradient(135deg, #f8fafc 0%, #e2e8f0 100%);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
}

.comparison-card--sodium .comparison-card-icon {
  background: var(--card-sodium-gradient);
  box-shadow: 0 8px 24px rgba(16, 185, 129, 0.3);
}

.comparison-card--lithium .comparison-card-icon {
  background: var(--card-lithium-gradient);
  box-shadow: 0 8px 24px rgba(239, 68, 68, 0.3);
}

.comparison-card-title {
  font-family: 'Plus Jakarta Sans', 'Inter', sans-serif;
  font-size: 28px;
  font-weight: 800;
  margin: 0 0 8px 0;
  color: #0f172a;
}

.comparison-card--sodium .comparison-card-title {
  color: #059669;
}

.comparison-card--lithium .comparison-card-title {
  color: #dc2626;
}

.comparison-card-subtitle {
  font-size: 15px;
  color: #64748b;
  margin: 0;
}

/* Card Features */
.comparison-features {
  display: flex;
  flex-direction: column;
  gap: var(--feature-spacing);
}

.comparison-feature {
  display: flex;
  align-items: flex-start;
  gap: 16px;
}

.comparison-feature-icon {
  width: var(--feature-icon-size);
  height: var(--feature-icon-size);
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 24px;
  border-radius: 12px;
  background: #f8fafc;
  transition: transform 0.3s ease;
}

.comparison-card--sodium .comparison-feature-icon {
  background: rgba(16, 185, 129, 0.1);
  color: #059669;
}

.comparison-card--lithium .comparison-feature-icon {
  background: rgba(239, 68, 68, 0.1);
  color: #dc2626;
}

.comparison-card:hover .comparison-feature-icon {
  transform: scale(1.1);
}

.comparison-feature-content {
  flex: 1;
}

.comparison-feature-title {
  font-size: 16px;
  font-weight: 700;
  color: #1f2937;
  margin: 0 0 4px 0;
}

.comparison-feature-desc {
  font-size: 14px;
  color: #64748b;
  margin: 0;
  line-height: 1.5;
}

/* Status Badges */
.comparison-feature-badge {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 4px 12px;
  border-radius: 12px;
  font-size: 12px;
  font-weight: 700;
  margin-top: 4px;
}

.comparison-feature-badge--positive {
  background: rgba(16, 185, 129, 0.15);
  color: #059669;
}

.comparison-feature-badge--negative {
  background: rgba(239, 68, 68, 0.15);
  color: #dc2626;
}

/* ============================================
   VS BADGE (CENTER)
   ============================================ */

.comparison-vs {
  display: flex;
  align-items: center;
  justify-content: center;
  width: var(--vs-badge-size);
  height: var(--vs-badge-size);
  background: var(--vs-badge-bg);
  border-radius: 50%;
  box-shadow: var(--vs-badge-shadow);
  font-size: 24px;
  font-weight: 900;
  color: white;
  letter-spacing: 0.05em;
  position: sticky;
  top: 120px;
  z-index: 3;
  animation: vsPulse 2s ease-in-out infinite;
}

@keyframes vsPulse {
  0%, 100% {
    transform: scale(1);
    box-shadow: var(--vs-badge-shadow);
  }
  50% {
    transform: scale(1.05);
    box-shadow: 0 12px 48px rgba(59, 130, 246, 0.6);
  }
}

/* ============================================
   BOTTOM CTA
   ============================================ */

.comparison-cta {
  margin-top: 64px;
  text-align: center;
  padding: 40px;
  background: white;
  border-radius: 20px;
  box-shadow: 0 10px 40px rgba(0, 0, 0, 0.1);
}

.comparison-cta-text {
  font-size: 20px;
  font-weight: 700;
  color: #0f172a;
  margin: 0 0 24px 0;
}

.comparison-cta-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  padding: 18px 40px;
  font-size: 18px;
  font-weight: 700;
  color: white;
  background: var(--card-sodium-gradient);
  border: none;
  border-radius: 16px;
  box-shadow: 0 8px 32px rgba(16, 185, 129, 0.4);
  cursor: pointer;
  text-decoration: none;
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.comparison-cta-button:hover {
  transform: translateY(-4px) scale(1.02);
  box-shadow: 0 12px 48px rgba(16, 185, 129, 0.6);
  color: white;
}

.comparison-cta-button:active {
  transform: translateY(-2px) scale(0.98);
}

.comparison-cta-icon {
  width: 24px;
  height: 24px;
  transition: transform 0.3s ease;
}

.comparison-cta-button:hover .comparison-cta-icon {
  transform: translateX(4px);
}

/* ============================================
   RESPONSIVE - TABLET
   ============================================ */

@media (max-width: 1023px) {
  :root {
    --comparison-padding: 60px;
    --card-padding: 32px;
  }

  .comparison-title {
    font-size: 36px;
  }

  .comparison-grid {
    grid-template-columns: 1fr;
    gap: 48px;
  }

  .comparison-vs {
    position: relative;
    top: auto;
    margin: -24px auto;
  }

  .comparison-card--sodium::before {
    font-size: 11px;
    padding: 6px 20px;
  }
}

/* ============================================
   RESPONSIVE - MOBILE
   ============================================ */

@media (max-width: 640px) {
  :root {
    --comparison-padding: var(--comparison-padding-mobile);
    --card-padding: 24px;
    --feature-icon-size: 40px;
    --feature-spacing: 20px;
  }

  .comparison-sodium {
    padding: var(--comparison-padding-mobile) 20px;
  }

  .comparison-eyebrow {
    font-size: 11px;
    padding: 6px 16px;
  }

  .comparison-title {
    font-size: 28px;
  }

  .comparison-subtitle {
    font-size: 16px;
  }

  .comparison-card-icon {
    width: 64px;
    height: 64px;
    font-size: 36px;
  }

  .comparison-card-title {
    font-size: 24px;
  }

  .comparison-card--sodium::before {
    font-size: 10px;
    padding: 6px 16px;
  }

  .comparison-vs {
    width: 64px;
    height: 64px;
    font-size: 18px;
  }

  .comparison-cta {
    padding: 32px 20px;
  }

  .comparison-cta-text {
    font-size: 18px;
  }

  .comparison-cta-button {
    width: 100%;
    padding: 16px 32px;
    font-size: 16px;
  }
}

/* ============================================
   PRINT STYLES
   ============================================ */

@media print {
  .comparison-sodium {
    background: white;
    padding: 40px 20px;
  }

  .comparison-card {
    box-shadow: none;
    border: 1px solid #000;
    page-break-inside: avoid;
  }

  .comparison-card:hover {
    transform: none;
  }

  .comparison-vs,
  .comparison-cta-button {
    display: none;
  }
}

/* ============================================
   REDUCED MOTION SUPPORT
   ============================================ */

@media (prefers-reduced-motion: reduce) {
  .comparison-card,
  .comparison-feature-icon,
  .comparison-vs,
  .comparison-cta-button {
    transition: none !important;
    animation: none !important;
  }

  .comparison-card:hover,
  .comparison-cta-button:hover {
    transform: none !important;
  }

  .comparison-card:hover .comparison-feature-icon {
    transform: none !important;
  }
}

/* ============================================
   ACCESSIBILITY
   ============================================ */

/* Focus states */
.comparison-cta-button:focus {
  outline: 3px solid #059669;
  outline-offset: 4px;
}

/* High contrast mode */
@media (prefers-contrast: high) {
  .comparison-card {
    border: 2px solid currentColor;
  }

  .comparison-feature-badge {
    border: 1px solid currentColor;
  }
}