/* Upgrade Modal - Premium Pricing Experience */
.upgrade-modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(15, 23, 42, 0.5);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: var(--z-modal);
  padding: var(--spacing-xl);
  animation: fadeIn 300ms cubic-bezier(0.4, 0, 0.2, 1);
}

.upgrade-modal-overlay--closing {
  animation: fadeOut 250ms cubic-bezier(0.4, 0, 1, 1);
}

@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

@keyframes fadeOut {
  from { opacity: 1; }
  to { opacity: 0; }
}

.upgrade-modal {
  background: var(--color-bg-elevated);
  border-radius: var(--radius-3xl);
  max-width: 920px;
  width: 100%;
  max-height: 90vh;
  overflow-y: auto;
  box-shadow: var(--shadow-2xl), 0 0 0 1px var(--color-border);
  position: relative;
  border: 1px solid var(--color-border);
  animation: modalSlideUp 0.4s cubic-bezier(0.68, -0.55, 0.27, 1.55);
}

@keyframes modalSlideUp {
  from {
    opacity: 0;
    transform: translateY(40px) scale(0.95);
  }
  to {
    opacity: 1;
    transform: translateY(0) scale(1);
  }
}

.upgrade-modal__close {
  position: absolute;
  top: var(--spacing-lg);
  right: var(--spacing-lg);
  width: 44px;
  height: 44px;
  border-radius: var(--radius-xl);
  background: var(--color-bg-secondary);
  border: 1px solid var(--color-border);
  color: var(--color-text-secondary);
  font-size: 1.5rem;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all var(--transition-base);
  z-index: var(--z-base);
  box-shadow: var(--shadow-xs);
}

.upgrade-modal__close:hover {
  background: var(--color-bg-tertiary);
  color: var(--color-text);
  transform: scale(1.1);
  box-shadow: var(--shadow-md);
}

.upgrade-modal__close:active {
  transform: scale(0.95);
}

/* Modal Header - Hero Section */
.upgrade-modal__header {
  text-align: center;
  padding: var(--spacing-3xl) var(--spacing-xl) var(--spacing-2xl);
  border-bottom: 1px solid var(--color-border-light);
  background: linear-gradient(180deg, var(--color-bg-secondary) 0%, var(--color-bg-elevated) 100%);
  position: relative;
  overflow: hidden;
}

.upgrade-modal__header::before {
  content: '';
  position: absolute;
  top: -50%;
  left: 50%;
  transform: translateX(-50%);
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, var(--color-primary-subtle), transparent 70%);
  pointer-events: none;
}

.upgrade__icon {
  font-size: 4rem;
  margin-bottom: var(--spacing-lg);
  animation: float 3s ease-in-out infinite;
  position: relative;
  z-index: 1;
}

.upgrade__title {
  font-family: var(--font-display);
  font-size: 2rem;
  font-weight: var(--font-extrabold);
  color: var(--color-text);
  margin-bottom: var(--spacing-sm);
  letter-spacing: -0.04em;
  position: relative;
  z-index: 1;
}

.upgrade__message {
  font-size: 1rem;
  color: var(--color-text-secondary);
  max-width: 600px;
  margin: 0 auto;
  line-height: 1.6;
  position: relative;
  z-index: 1;
}

/* Modal Body - Pricing Cards */
.upgrade-modal__body {
  padding: var(--spacing-2xl);
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: var(--spacing-xl);
}

/* Pricing Cards - Premium Design */
.pricing-card {
  background: var(--color-bg-elevated);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-2xl);
  padding: var(--spacing-2xl);
  display: flex;
  flex-direction: column;
  position: relative;
  transition: all var(--transition-spring);
  box-shadow: var(--shadow-md);
  overflow: hidden;
}

.pricing-card::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at top, var(--color-primary-subtle), transparent 60%);
  opacity: 0;
  transition: opacity var(--transition-base);
  pointer-events: none;
}

.pricing-card:hover {
  transform: translateY(-8px) scale(1.02);
  box-shadow: var(--shadow-xl);
}

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

.pricing-card--free {
  opacity: 0.9;
}

.pricing-card--pro {
  border-color: var(--color-primary);
  background: var(--color-primary-subtle);
  box-shadow: 0 0 0 1px var(--color-primary), var(--shadow-lg);
}

.pricing-card--pro::before {
  opacity: 1;
}

.pricing__badge {
  position: absolute;
  top: -12px;
  left: 50%;
  transform: translateX(-50%);
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-accent) 100%);
  color: white;
  padding: 0.375rem 1rem;
  border-radius: var(--radius-xl);
  font-size: 0.75rem;
  font-weight: var(--font-bold);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  box-shadow: var(--shadow-md), inset 0 1px 0 rgba(255, 255, 255, 0.2);
}

/* Pricing Header */
.pricing__header {
  text-align: center;
  padding-bottom: var(--spacing-lg);
  border-bottom: 1px solid var(--color-border-light);
  margin-bottom: var(--spacing-lg);
  position: relative;
  z-index: 1;
}

.pricing__name {
  font-family: var(--font-display);
  font-size: 1.5rem;
  font-weight: var(--font-bold);
  color: var(--color-text);
  margin-bottom: var(--spacing-md);
  letter-spacing: -0.03em;
}

.pricing__price {
  display: flex;
  align-items: baseline;
  justify-content: center;
  gap: 0.375rem;
}

.price__currency {
  font-size: 1.25rem;
  font-weight: var(--font-semibold);
  color: var(--color-text-secondary);
}

.price__amount {
  font-family: var(--font-display);
  font-size: 3rem;
  font-weight: var(--font-extrabold);
  color: var(--color-text);
  line-height: 1;
  letter-spacing: -0.04em;
}

.price__interval {
  font-size: 1rem;
  color: var(--color-text-secondary);
  font-weight: var(--font-medium);
}

/* Pricing Features - Check List */
.pricing__features {
  list-style: none;
  padding: 0;
  margin: 0 0 auto;
  display: flex;
  flex-direction: column;
  gap: var(--spacing-md);
  position: relative;
  z-index: 1;
}

.feature-item {
  display: flex;
  align-items: flex-start;
  gap: 0.625rem;
  font-size: 0.9375rem;
  color: var(--color-text);
  line-height: 1.5;
  transition: all var(--transition-fast);
}

.feature-item:hover {
  transform: translateX(4px);
}

.feature-item__icon {
  flex-shrink: 0;
  width: 22px;
  height: 22px;
  border-radius: var(--radius-md);
  background: linear-gradient(135deg, var(--color-success) 0%, #059669 100%);
  color: white;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: var(--font-bold);
  font-size: 0.75rem;
  margin-top: 2px;
  box-shadow: var(--shadow-sm);
}

.feature-item--disabled .feature-item__icon {
  background: var(--color-bg-tertiary);
  color: var(--color-text-tertiary);
  box-shadow: none;
}

.feature-item--disabled {
  color: var(--color-text-tertiary);
  text-decoration: line-through;
  opacity: 0.5;
}

/* Pricing Footer */
.pricing__footer {
  margin-top: var(--spacing-xl);
  padding-top: var(--spacing-lg);
  border-top: 1px solid var(--color-border-light);
  position: relative;
  z-index: 1;
}

/* Modal Footer */
.upgrade-modal__footer {
  text-align: center;
  padding: var(--spacing-lg) var(--spacing-xl);
  border-top: 1px solid var(--color-border-light);
  background: var(--color-bg-secondary);
}

.upgrade__note {
  font-size: 0.875rem;
  color: var(--color-text-tertiary);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  flex-wrap: wrap;
}

/* Success State - Celebration */
.upgrade__success {
  text-align: center;
  padding: var(--spacing-4xl);
}

.success__icon {
  font-size: 5rem;
  margin-bottom: var(--spacing-xl);
  animation: successPopIn 0.6s cubic-bezier(0.68, -0.55, 0.27, 1.55);
}

@keyframes successPopIn {
  0% { transform: scale(0) rotate(-180deg); opacity: 0; }
  50% { transform: scale(1.2) rotate(10deg); }
  100% { transform: scale(1) rotate(0deg); opacity: 1; }
}

.success__title {
  font-family: var(--font-display);
  font-size: 2rem;
  font-weight: var(--font-extrabold);
  color: var(--color-primary);
  margin-bottom: var(--spacing-sm);
  letter-spacing: -0.04em;
}

.success__message {
  font-size: 1rem;
  color: var(--color-text-secondary);
  line-height: 1.6;
  max-width: 500px;
  margin: 0 auto;
}

/* Tier Badge - Status Indicator */
.tier-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.375rem 0.875rem;
  border-radius: var(--radius-xl);
  font-size: 0.75rem;
  font-weight: var(--font-bold);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  transition: all var(--transition-base);
}

.tier-badge--free {
  background: var(--color-bg-tertiary);
  color: var(--color-text-secondary);
  border: 1px solid var(--color-border);
}

.tier-badge--pro {
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-accent) 100%);
  color: white;
  box-shadow: var(--shadow-sm), inset 0 1px 0 rgba(255, 255, 255, 0.2);
}

.tier-badge:hover {
  opacity: 0.85;
  transform: scale(1.05);
  cursor: pointer;
}

/* Prompt Counter - Usage Display */
.prompt-counter {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.5rem 0.875rem;
  background: var(--color-bg-elevated);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  font-size: 0.875rem;
  color: var(--color-text);
  font-weight: var(--font-semibold);
  box-shadow: var(--shadow-xs);
}

.prompt-counter--limit {
  color: var(--color-warning);
  border-color: var(--color-warning);
  background: rgba(245, 158, 11, 0.08);
}

.prompt-counter--exceeded {
  color: var(--color-error);
  border-color: var(--color-error);
  background: rgba(239, 68, 68, 0.08);
}

/* Pro Lock Badge */
.pro-lock {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.375rem 0.875rem;
  background: var(--color-primary-subtle);
  border: 1px solid var(--color-primary);
  border-radius: var(--radius-xl);
  font-size: 0.75rem;
  font-weight: var(--font-bold);
  color: var(--color-primary);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  box-shadow: var(--shadow-xs);
  transition: all var(--transition-base);
}

.pro-lock:hover {
  transform: scale(1.05);
  box-shadow: var(--shadow-sm);
}

/* Mobile Responsive */
@media (max-width: 768px) {
  .upgrade-modal {
    max-width: 100%;
    margin: var(--spacing-md);
    max-height: calc(100vh - 2 * var(--spacing-md));
    border-radius: var(--radius-2xl);
  }

  .upgrade-modal__header {
    padding: var(--spacing-2xl) var(--spacing-lg) var(--spacing-xl);
  }

  .upgrade__title {
    font-size: 1.625rem;
  }

  .upgrade-modal__body {
    grid-template-columns: 1fr;
    padding: var(--spacing-lg);
    gap: var(--spacing-lg);
  }

  .pricing-card {
    padding: var(--spacing-xl);
  }

  .price__amount {
    font-size: 2.5rem;
  }

  .upgrade-modal__footer {
    padding: var(--spacing-md) var(--spacing-lg);
  }
}