/* =============================================================================
   Pricing CSS — 4-tier grid + horizontal Institution card
   Premium SaaS-grade spacing, hierarchy, and polish
   ============================================================================= */

/* --- Pricing section spacing --- */
.pricing-section {
  padding-top: var(--space-3xl);
  padding-bottom: var(--space-3xl);
}

/* --- 4-column grid for main plans --- */
.pricing-grid--four {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-xl);
  align-items: start;
  max-width: 1120px;
  margin-left: auto;
  margin-right: auto;
}

/* --- Card base --- */
.pricing-grid--four .pricing-card {
  padding: var(--space-2xl) var(--space-xl);
  min-height: 520px;
  display: flex;
  flex-direction: column;
  border-radius: var(--radius-xl);
  border: 1px solid var(--surface-border);
  background: white;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.04);
  transition: all var(--transition-base);
  position: relative;
}

.pricing-grid--four .pricing-card:hover {
  box-shadow:
    0 8px 30px rgba(110, 79, 158, 0.08),
    0 1px 3px rgba(0, 0, 0, 0.04);
  transform: translateY(-6px);
}

/* --- Typography --- */
.pricing-grid--four .price-amount {
  font-size: 2.5rem;
  font-weight: 800;
  letter-spacing: -0.03em;
}

.pricing-grid--four .pricing-card-header h3 {
  font-size: 1.25rem;
  font-weight: 700;
  margin-bottom: var(--space-xs);
}

.pricing-grid--four .pricing-tagline {
  font-size: 0.85rem;
  color: var(--color-text-muted);
  line-height: 1.5;
}

.pricing-grid--four .pricing-features li {
  font-size: 0.88rem;
  margin-bottom: 8px;
  color: var(--color-text-secondary);
  line-height: 1.5;
}

/* --- Featured card — soft glow border --- */
.pricing-grid--four .pricing-card-featured {
  border: 2px solid var(--color-primary);
  box-shadow:
    0 0 0 1px rgba(110, 79, 158, 0.1),
    0 8px 30px rgba(110, 79, 158, 0.12),
    0 0 60px rgba(110, 79, 158, 0.06);
  transform: scale(1.03);
  z-index: 2;
}

.pricing-grid--four .pricing-card-featured:hover {
  box-shadow:
    0 0 0 1px rgba(110, 79, 158, 0.15),
    0 12px 40px rgba(110, 79, 158, 0.16),
    0 0 80px rgba(110, 79, 158, 0.08);
  transform: scale(1.03) translateY(-6px);
}

/* --- Popular badge --- */
.pricing-popular {
  position: absolute;
  top: -13px;
  left: 50%;
  transform: translateX(-50%);
  padding: 5px 20px;
  font-size: 0.7rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
  color: white;
  border-radius: var(--radius-full);
  white-space: nowrap;
  box-shadow: 0 2px 8px rgba(110, 79, 158, 0.3);
}

/* --- Price section --- */
.pricing-grid--four .pricing-price {
  margin-bottom: var(--space-lg);
  padding-bottom: var(--space-lg);
  border-bottom: 1px solid var(--surface-border);
}

/* --- Yearly billing note --- */
.pricing-yearly-note {
  font-size: 0.76rem;
  color: var(--color-text-muted);
  margin-top: -8px;
  margin-bottom: var(--space-md);
  font-weight: 500;
}

/* --- Active billing label --- */
.billing-label--active {
  color: var(--color-text);
  font-weight: 600;
}

/* --- Features list grows to fill space --- */
.pricing-grid--four .pricing-features {
  flex: 1;
  margin-bottom: var(--space-sm);
}

/* --- Expandable extra features --- */
.pricing-features-extra {
  max-height: 0;
  overflow: hidden;
  opacity: 0;
  transition: max-height 0.35s ease, opacity 0.25s ease, margin 0.35s ease;
  margin-bottom: 0;
  list-style: none;
  padding: 0;
}

.pricing-features-extra.open {
  max-height: 300px;
  opacity: 1;
  margin-bottom: var(--space-md);
}

.pricing-features-extra li {
  position: relative;
  padding-left: 28px;
  margin-bottom: 8px;
  font-size: 0.88rem;
  color: var(--color-text-secondary);
  line-height: 1.5;
}

.pricing-features-extra li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 5px;
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: var(--color-lavender-light);
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath d='M3 6l2 2 4-4' stroke='%236e4f9e' stroke-width='2' fill='none' stroke-linecap='round'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: center;
}

/* --- Unavailable features (muted, no strikethrough) --- */
.pricing-feature-unavailable {
  color: var(--color-text-muted) !important;
  opacity: 0.55;
  cursor: help;
  position: relative;
}

.pricing-feature-unavailable::before {
  background: var(--color-purple-100) !important;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath d='M3 3l6 6M9 3l-6 6' stroke='%239b7ec5' stroke-width='1.5' fill='none' stroke-linecap='round'/%3E%3C/svg%3E") !important;
  background-repeat: no-repeat !important;
  background-position: center !important;
}

/* --- Expand button --- */
.pricing-expand-btn {
  display: inline-block;
  background: none;
  border: none;
  padding: 0;
  margin-bottom: var(--space-md);
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--color-primary);
  cursor: pointer;
  transition: color var(--transition-fast);
  text-align: left;
}

.pricing-expand-btn:hover {
  color: var(--color-primary-dark);
}

.pricing-expand-btn::after {
  content: '';
  display: inline-block;
  width: 12px;
  height: 12px;
  margin-left: 4px;
  vertical-align: middle;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath d='M3 4.5l3 3 3-3' stroke='%236e4f9e' stroke-width='1.5' fill='none' stroke-linecap='round'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: center;
  transition: transform var(--transition-fast);
}

.pricing-expand-btn.open::after {
  transform: rotate(180deg);
}

/* --- CTA buttons — push to bottom --- */
.pricing-grid--four .pricing-cta {
  margin-top: auto;
  transition: all var(--transition-fast);
}

.pricing-grid--four .pricing-cta:hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(110, 79, 158, 0.2);
}

.pricing-cta.btn-disabled {
  opacity: 0.5;
  pointer-events: none;
}

/* --- Comparison summary --- */
.pricing-comparison {
  margin-top: var(--space-2xl);
  text-align: center;
}

.pricing-comparison p {
  color: var(--color-text-muted);
  font-size: 0.88rem;
  font-weight: 400;
}

/* =============================================================================
   Institutional — horizontal card below the grid
   ============================================================================= */
.pricing-card-institutional-wrap {
  margin-top: var(--space-2xl);
  max-width: 1120px;
  margin-left: auto;
  margin-right: auto;
}

.pricing-card-horizontal {
  display: flex;
  align-items: center;
  gap: var(--space-2xl);
  padding: var(--space-2xl) var(--space-3xl) !important;
  min-height: auto !important;
  border-radius: var(--radius-xl);
}

.pricing-horizontal-left {
  flex: 0 0 260px;
}

.pricing-horizontal-left .pricing-card-header {
  margin-bottom: var(--space-lg);
}

.pricing-horizontal-left .pricing-price {
  border-bottom: none;
  margin-bottom: 0;
  padding-bottom: 0;
}

.pricing-horizontal-middle {
  flex: 1;
  display: flex;
  gap: var(--space-2xl);
}

.pricing-horizontal-middle .pricing-features {
  flex: 1;
  margin-bottom: 0;
}

.pricing-horizontal-right {
  flex: 0 0 180px;
  display: flex;
  align-items: center;
}

.pricing-horizontal-right .pricing-cta {
  white-space: nowrap;
}

/* --- Institutional card — dark gradient --- */
.pricing-card-institutional {
  background: linear-gradient(145deg, var(--color-primary-deeper, #3a2570) 0%, var(--color-secondary, #1e2058) 100%);
  color: #fff;
  border-color: rgba(255, 255, 255, 0.08) !important;
}

.pricing-card-institutional .pricing-card-header h3 {
  color: #fff;
  font-size: 1.35rem;
}

.pricing-card-institutional .pricing-tagline,
.pricing-card-institutional .price-period {
  color: rgba(255, 255, 255, 0.75);
}

.pricing-card-institutional .price-amount {
  color: #fff;
}

.pricing-card-institutional .pricing-features li,
.pricing-card-institutional .pricing-features-extra li {
  color: rgba(255, 255, 255, 0.75);
}

.pricing-card-institutional .pricing-features li::before,
.pricing-card-institutional .pricing-features-extra li::before {
  background: rgba(255, 255, 255, 0.12);
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath d='M3 6l2 2 4-4' stroke='%23ffffff' stroke-width='2' fill='none' stroke-linecap='round'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: center;
}

.pricing-card-institutional .pricing-tier-icon {
  background: rgba(255, 255, 255, 0.1);
  color: rgba(255, 255, 255, 0.9);
}

.pricing-card-institutional .pricing-expand-btn {
  color: rgba(255, 255, 255, 0.7);
}

.pricing-card-institutional .pricing-expand-btn:hover {
  color: rgba(255, 255, 255, 0.95);
}

.pricing-card-institutional .pricing-expand-btn::after {
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath d='M3 4.5l3 3 3-3' stroke='rgba(255,255,255,0.7)' stroke-width='1.5' fill='none' stroke-linecap='round'/%3E%3C/svg%3E");
}

.pricing-card-institutional:hover {
  box-shadow:
    0 12px 40px rgba(62, 37, 112, 0.35),
    0 0 60px rgba(62, 37, 112, 0.1);
  transform: translateY(-4px);
}

/* Institutional CTA — inverted style */
.pricing-cta-inst {
  background: rgba(255, 255, 255, 0.12) !important;
  color: #fff !important;
  border: 1px solid rgba(255, 255, 255, 0.25) !important;
  backdrop-filter: blur(4px);
}

.pricing-cta-inst:hover {
  background: rgba(255, 255, 255, 0.22) !important;
  box-shadow: 0 4px 16px rgba(255, 255, 255, 0.1) !important;
}

/* "Custom" label styling */
.pricing-custom-label {
  font-size: 2.2rem !important;
  letter-spacing: -0.02em;
}

/* =============================================================================
   Responsive
   ============================================================================= */

/* --- 2 columns below 1024px --- */
@media (max-width: 1024px) {
  .pricing-grid--four {
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-lg);
    max-width: 720px;
  }

  .pricing-grid--four .pricing-card {
    min-height: auto;
  }

  .pricing-grid--four .pricing-card-featured {
    transform: scale(1.01);
  }

  .pricing-grid--four .pricing-card-featured:hover {
    transform: scale(1.01) translateY(-6px);
  }

  /* Stack institutional card */
  .pricing-card-horizontal {
    flex-direction: column;
    align-items: stretch;
    gap: var(--space-lg);
    padding: var(--space-2xl) !important;
  }

  .pricing-horizontal-left {
    flex: none;
  }

  .pricing-horizontal-middle {
    flex-direction: column;
    gap: 0;
  }

  .pricing-horizontal-right {
    flex: none;
  }
}

/* --- 1 column below 640px --- */
@media (max-width: 640px) {
  .pricing-grid--four {
    grid-template-columns: 1fr;
    gap: var(--space-xl);
    max-width: 420px;
  }

  .pricing-grid--four .pricing-card-featured {
    transform: none;
  }

  .pricing-grid--four .pricing-card-featured:hover {
    transform: translateY(-6px);
  }

  .pricing-grid--four .pricing-card {
    padding: var(--space-2xl);
  }

  .pricing-grid--four .price-amount {
    font-size: 2.5rem;
  }

  .pricing-grid--four .pricing-card-header h3 {
    font-size: 1.3rem;
  }

  .pricing-grid--four .pricing-features li,
  .pricing-features-extra li {
    font-size: 0.9rem;
  }

  .pricing-card-horizontal {
    padding: var(--space-xl) !important;
  }

  .pricing-card-institutional-wrap {
    max-width: 420px;
  }
}