/* ============================================================================
   Checkout Page Styles - Phase 3.2 Redesign
   ============================================================================ */

/* ============================================================================
   Page Layout
   ============================================================================ */

.page-internal {
  background: var(--color-bg-primary);
}

.checkout-main {
  flex: 1;
  padding: calc(80px + var(--space-10)) 0 var(--space-10);
  position: relative;
}

/* Decorative background grid */
.checkout-main::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(var(--color-border-subtle) 1px, transparent 1px),
    linear-gradient(90deg, var(--color-border-subtle) 1px, transparent 1px);
  background-size: 60px 60px;
  mask-image: linear-gradient(to bottom, black 0%, transparent 50%);
  opacity: 0.15;
  pointer-events: none;
  z-index: 0;
}

/* Decorative glow */
.checkout-main::after {
  content: '';
  position: absolute;
  top: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 100%;
  max-width: 800px;
  height: 400px;
  background: radial-gradient(ellipse at center, var(--color-brand-glow) 0%, transparent 70%);
  filter: blur(80px);
  opacity: 0.4;
  pointer-events: none;
  z-index: 0;
}

.checkout-container {
  max-width: 900px;
  position: relative;
  z-index: 1;
}

/* ============================================================================
   Stepper - Enhanced Design
   ============================================================================ */

.stepper {
  margin-bottom: var(--space-10);
  position: relative;
}

.stepper-step {
  position: relative;
  z-index: 1;
}

.stepper-number {
  width: 40px;
  height: 40px;
  font-size: var(--text-base);
  transition: transform var(--transition-base), background-color var(--transition-base), box-shadow var(--transition-base);
}

.stepper-step.active .stepper-number {
  transform: scale(1.1);
  box-shadow: var(--shadow-glow-sm);
}

.stepper-step.completed .stepper-number {
  background: var(--color-success);
  border-color: var(--color-success);
}

/* Checkmark SVG for completed step */
.stepper-step.completed .stepper-number::after {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 16px;
  height: 16px;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 24 24' fill='none' stroke='white' stroke-width='3' xmlns='http://www.w3.org/2000/svg'%3E%3Cpolyline points='20 6 9 17 4 12'%3E%3C/polyline%3E%3C/svg%3E");
  background-size: contain;
  background-repeat: no-repeat;
}

.stepper-step.completed .stepper-number span {
  opacity: 0;
}

.stepper-label {
  display: none;
  font-size: var(--text-sm);
  font-weight: var(--font-medium);
  transition: color var(--transition-fast);
}

@media (min-width: 480px) {
  .stepper-label {
    display: inline;
  }
}

.stepper-divider {
  width: 60px;
  height: 3px;
  background: linear-gradient(90deg, var(--color-border), var(--color-border));
  border-radius: var(--radius-full);
  transition: background var(--transition-base);
}

.stepper-divider.completed {
  background: linear-gradient(90deg, var(--color-success), var(--color-brand));
}

/* ============================================================================
   Steps Container
   ============================================================================ */

.checkout-step {
  display: none;
}

.checkout-step.active {
  display: block;
}

/* Step 1 animation */
.step-1.active {
  animation: fadeInUp 0.5s var(--ease-out) forwards;
}

/* Step 2 animations */
.step-2.active .checkout-card {
  animation: slideInLeft 0.5s var(--ease-out) forwards;
}

.step-2.active .checkout-summary {
  animation: slideInRight 0.5s var(--ease-out) 0.1s forwards;
  opacity: 0;
}

/* ============================================================================
   Checkout Card - Enhanced Design
   ============================================================================ */

.checkout-card {
  background: var(--color-bg-card);
  border: 1px solid var(--color-border-subtle);
  border-radius: var(--radius-xl);
  padding: var(--space-8);
  box-shadow: var(--shadow-lg);
  transition: transform var(--transition-base), box-shadow var(--transition-base);
}

.checkout-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-xl);
}

.checkout-title {
  font-family: var(--font-display);
  font-size: var(--text-2xl);
  font-weight: var(--font-bold);
  margin-bottom: var(--space-2);
  background: linear-gradient(135deg, var(--color-text-primary), var(--color-brand-accent));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.checkout-subtitle {
  font-size: var(--text-base);
  color: var(--color-text-secondary);
  margin-bottom: var(--space-8);
}

/* ============================================================================
   Step 1: Plan Selection - Enhanced
   ============================================================================ */

.selected-plan {
  margin-bottom: var(--space-8);
}

.plan-card-selected {
  background: var(--color-bg-secondary);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-6);
  transition: border-color var(--transition-base), box-shadow var(--transition-base);
}

.plan-card-selected.highlighted {
  border-color: var(--color-brand);
  box-shadow: var(--shadow-glow);
  position: relative;
}

.plan-card-selected.highlighted::before {
  content: '';
  position: absolute;
  inset: -1px;
  border-radius: var(--radius-lg);
  padding: 1px;
  background: linear-gradient(135deg, var(--color-brand), var(--color-brand-accent));
  mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
  mask-composite: exclude;
  -webkit-mask-composite: xor;
  pointer-events: none;
}

.plan-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: var(--space-4);
  margin-bottom: var(--space-6);
}

.plan-name {
  font-family: var(--font-display);
  font-size: var(--text-xl);
  font-weight: var(--font-bold);
  margin-bottom: var(--space-1);
}

.plan-description {
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
}

.plan-price {
  text-align: right;
  flex-shrink: 0;
}

.price-value {
  font-family: var(--font-display);
  font-size: var(--text-2xl);
  font-weight: var(--font-bold);
  color: var(--color-brand-accent);
}

.price-period {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
}

.plan-features {
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-2);
}

.plan-features li {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
}

.plan-features svg {
  color: var(--color-success);
  flex-shrink: 0;
}

/* View all plans link */
.view-all-plans {
  margin-bottom: var(--space-6);
}

/* Checkout actions */
.checkout-actions {
  display: flex;
  justify-content: space-between;
  gap: var(--space-4);
}

.checkout-actions .btn-primary {
  flex: 1;
  max-width: 200px;
}

/* Plan not found */
.plan-not-found {
  text-align: center;
}

.plan-not-found .alert {
  text-align: left;
  margin-bottom: var(--space-6);
}

/* ============================================================================
   Step 2: Account Creation - Enhanced Grid
   ============================================================================ */

.checkout-grid {
  display: grid;
  grid-template-columns: 1fr 320px;
  gap: var(--space-8);
  align-items: start;
}

/* ============================================================================
   Form - Enhanced Styles
   ============================================================================ */

.register-form .form-group {
  margin-bottom: var(--space-5);
}

.register-form .form-label {
  color: var(--color-text-secondary);
  margin-bottom: var(--space-2);
}

.register-form .form-input {
  background: var(--color-bg-secondary);
  border-color: var(--color-border);
}

.register-form .form-input:focus {
  border-color: var(--color-brand);
  box-shadow: 0 0 0 3px var(--color-brand-glow);
}

.register-form .form-checkbox {
  margin-top: var(--space-2);
}

.register-form .form-checkbox a {
  color: var(--color-brand-accent);
  text-decoration: underline;
}

.register-form .form-checkbox a:hover {
  color: var(--color-brand);
}

.form-global-error {
  margin-bottom: var(--space-5);
}

.form-note {
  margin-top: var(--space-4);
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  text-align: center;
}

/* Submit button enhanced */
.register-form .btn-primary {
  background: linear-gradient(135deg, var(--color-brand), var(--color-brand-hover));
  position: relative;
  overflow: hidden;
}

.register-form .btn-primary::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, transparent, var(--color-white-10), transparent);
  transform: translateX(-100%);
  transition: transform 0.5s ease;
}

.register-form .btn-primary:hover::before {
  transform: translateX(100%);
}

/* ============================================================================
   Summary Card - Enhanced Design
   ============================================================================ */

.checkout-summary {
  position: sticky;
  top: calc(80px + var(--space-6));
}

.summary-card {
  background: var(--color-bg-card);
  border: 1px solid var(--color-border-subtle);
  border-radius: var(--radius-xl);
  padding: var(--space-6);
  margin-bottom: var(--space-4);
  box-shadow: var(--shadow-lg);
}

.summary-title {
  font-size: var(--text-lg);
  font-weight: var(--font-semibold);
  margin-bottom: var(--space-5);
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

.summary-title::before {
  content: '';
  width: 4px;
  height: 20px;
  background: var(--color-brand);
  border-radius: var(--radius-full);
}

.summary-plan {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: var(--space-4);
}

.summary-plan-name {
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
}

.summary-plan-price {
  font-weight: var(--font-semibold);
}

.summary-divider {
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--color-border), transparent);
  margin-bottom: var(--space-4);
}

.summary-total {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: var(--space-5);
}

.summary-total span:first-child {
  font-weight: var(--font-medium);
}

.summary-total-price {
  font-family: var(--font-display);
  font-size: var(--text-2xl);
  font-weight: var(--font-bold);
  color: var(--color-brand-accent);
}

.summary-info {
  display: flex;
  align-items: flex-start;
  gap: var(--space-2);
  padding: var(--space-3);
  background: var(--color-success-bg);
  border: 1px solid var(--color-success-border-subtle);
  border-radius: var(--radius-md);
  font-size: var(--text-xs);
  color: var(--color-success);
}

.summary-info svg {
  flex-shrink: 0;
  margin-top: 1px;
  color: var(--color-success);
}

/* Security badge */
.summary-security {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: var(--space-3);
  margin-top: var(--space-4);
  background: var(--color-bg-secondary);
  border-radius: var(--radius-md);
  font-size: var(--text-xs);
  color: var(--color-text-muted);
}

.summary-security svg {
  color: var(--color-brand-accent);
}

/* ============================================================================
   Trust Ticker Strip
   ============================================================================ */

.ticker-strip--trust {
  background: var(--color-bg-secondary);
  border-top: 1px solid var(--color-border-subtle);
  padding: var(--space-3) 0;
}

.ticker-content--trust {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  text-transform: none;
  letter-spacing: normal;
  font-weight: var(--font-medium);
}

.ticker-content--trust .ticker-bullet {
  font-size: var(--text-xs);
  color: var(--color-success);
}

/* ============================================================================
   Animations
   ============================================================================ */

@keyframes slideInLeft {
  from {
    opacity: 0;
    transform: translateX(-30px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

@keyframes slideInRight {
  from {
    opacity: 0;
    transform: translateX(30px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

/* ============================================================================
   Responsive - Tablet (1024px)
   ============================================================================ */

@media (max-width: 1024px) {
  .checkout-grid {
    grid-template-columns: 1fr;
  }

  .checkout-summary {
    position: static;
    order: -1;
  }
}

/* ============================================================================
   Responsive - Mobile (768px)
   ============================================================================ */

@media (max-width: 768px) {
  .checkout-main {
    padding: calc(80px + var(--space-6)) 0 var(--space-6);
  }

  .checkout-card {
    padding: var(--space-6);
  }

  .stepper {
    margin-bottom: var(--space-8);
  }

  .stepper-number {
    width: 36px;
    height: 36px;
    font-size: var(--text-sm);
  }

  .stepper-divider {
    width: 40px;
  }

  .plan-header {
    flex-direction: column;
  }

  .plan-price {
    text-align: left;
  }

  .plan-features {
    grid-template-columns: 1fr;
  }

  .checkout-actions {
    flex-direction: column;
  }

  .checkout-actions .btn-primary {
    max-width: 100%;
    order: -1;
  }

  /* Simplify animations on mobile */
  .step-2.active .checkout-card,
  .step-2.active .checkout-summary {
    animation: fadeInUp 0.4s var(--ease-out) forwards;
  }
}

/* ============================================================================
   Responsive - Small Mobile (480px)
   ============================================================================ */

@media (max-width: 480px) {
  .checkout-main::before,
  .checkout-main::after {
    display: none;
  }

  .checkout-title {
    font-size: var(--text-xl);
  }

  .summary-card {
    padding: var(--space-4);
  }

  .ticker-strip--trust {
    display: none;
  }
}

/* ============================================================================
   Reduced Motion Support
   ============================================================================ */

@media (prefers-reduced-motion: reduce) {
  .checkout-step.active,
  .step-2.active .checkout-card,
  .step-2.active .checkout-summary {
    animation: none;
    opacity: 1;
    transform: none;
  }

  .stepper-step.active .stepper-number {
    transform: none;
  }

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

  .ticker-strip--trust .ticker-track {
    animation-play-state: paused;
  }
}