/**
 * Premium Fintech Design System
 * Inspired by Stripe, Robinhood, Linear, Perplexity
 * 
 * Design Principles:
 * - Clean, minimal layouts with generous whitespace
 * - Sophisticated muted color palette (no bright/bubbly colors)
 * - Professional typography with clear hierarchy
 * - Subtle shadows and borders
 * - Trust-building visual cues
 * - Smooth, purposeful micro-interactions
 */

/* ============================================
   ROOT VARIABLES - Premium Color System
   ============================================ */
:root {
  /* Base Colors - Sophisticated, muted palette */
  --pf-bg: #fafafa;
  --pf-bg-alt: #f5f5f5;
  --pf-card: #ffffff;
  --pf-card-elevated: #ffffff;
  
  /* Borders */
  --pf-border: #e5e7eb;
  --pf-border-hover: #d1d5db;
  --pf-border-active: #0f172a;
  
  /* Text - High contrast, professional */
  --pf-text-primary: #0f172a;
  --pf-text-secondary: #475569;
  --pf-text-muted: #94a3b8;
  --pf-text-disabled: #cbd5e1;
  
  /* Accent - Understated, professional */
  --pf-accent: #0f172a;
  --pf-accent-hover: #1e293b;
  --pf-accent-subtle: #f1f5f9;
  
  /* Status Colors - Muted, sophisticated */
  --pf-success: #059669;
  --pf-success-bg: #ecfdf5;
  --pf-success-border: #a7f3d0;
  
  --pf-warning: #d97706;
  --pf-warning-bg: #fffbeb;
  --pf-warning-border: #fcd34d;
  
  --pf-error: #dc2626;
  --pf-error-bg: #fef2f2;
  --pf-error-border: #fecaca;
  
  --pf-info: #0284c7;
  --pf-info-bg: #f0f9ff;
  --pf-info-border: #7dd3fc;
  
  /* Typography */
  --pf-font: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --pf-font-mono: 'JetBrains Mono', 'SF Mono', Monaco, monospace;
  
  /* Spacing */
  --pf-spacing-xs: 4px;
  --pf-spacing-sm: 8px;
  --pf-spacing-md: 16px;
  --pf-spacing-lg: 24px;
  --pf-spacing-xl: 32px;
  --pf-spacing-2xl: 48px;
  
  /* Border Radius */
  --pf-radius-sm: 4px;
  --pf-radius-md: 8px;
  --pf-radius-lg: 12px;
  --pf-radius-xl: 16px;
  
  /* Shadows - Subtle, layered */
  --pf-shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.04);
  --pf-shadow-md: 0 4px 12px rgba(0, 0, 0, 0.06);
  --pf-shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.08);
  --pf-shadow-xl: 0 16px 48px rgba(0, 0, 0, 0.12);
  
  /* Transitions */
  --pf-transition-fast: 0.1s ease;
  --pf-transition-base: 0.15s ease;
  --pf-transition-slow: 0.25s ease;
}


/* ============================================
   BASE LAYOUT
   ============================================ */
.pf-page {
  background: var(--pf-bg);
  min-height: 100vh;
  font-family: var(--pf-font);
  color: var(--pf-text-primary);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

.pf-container {
  max-width: 720px;
  margin: 0 auto;
  padding: var(--pf-spacing-2xl) var(--pf-spacing-lg);
}

.pf-container--narrow {
  max-width: 560px;
}

.pf-container--wide {
  max-width: 960px;
}


/* ============================================
   TYPOGRAPHY
   ============================================ */
.pf-heading-1 {
  font-size: 32px;
  font-weight: 700;
  letter-spacing: -0.025em;
  color: var(--pf-text-primary);
  margin: 0 0 var(--pf-spacing-sm) 0;
  line-height: 1.2;
}

.pf-heading-2 {
  font-size: 24px;
  font-weight: 600;
  letter-spacing: -0.02em;
  color: var(--pf-text-primary);
  margin: 0 0 var(--pf-spacing-sm) 0;
  line-height: 1.3;
}

.pf-heading-3 {
  font-size: 18px;
  font-weight: 600;
  letter-spacing: -0.01em;
  color: var(--pf-text-primary);
  margin: 0 0 var(--pf-spacing-sm) 0;
}

.pf-heading-4 {
  font-size: 15px;
  font-weight: 600;
  color: var(--pf-text-primary);
  margin: 0;
}

.pf-text {
  font-size: 15px;
  line-height: 1.6;
  color: var(--pf-text-secondary);
  margin: 0;
}

.pf-text--small {
  font-size: 13px;
}

.pf-text--muted {
  color: var(--pf-text-muted);
}

.pf-label {
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--pf-text-muted);
}

.pf-mono {
  font-family: var(--pf-font-mono);
  font-size: 13px;
}


/* ============================================
   CARDS
   ============================================ */
.pf-card {
  background: var(--pf-card);
  border: 1px solid var(--pf-border);
  border-radius: var(--pf-radius-lg);
  padding: var(--pf-spacing-lg);
  margin-bottom: var(--pf-spacing-md);
}

.pf-card--elevated {
  box-shadow: var(--pf-shadow-md);
  border-color: transparent;
}

.pf-card__header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: var(--pf-spacing-lg);
}

.pf-card__title {
  font-size: 15px;
  font-weight: 600;
  color: var(--pf-text-primary);
  margin: 0;
}

.pf-card__subtitle {
  font-size: 13px;
  color: var(--pf-text-muted);
  margin-top: 4px;
}

.pf-card__divider {
  height: 1px;
  background: var(--pf-border);
  margin: var(--pf-spacing-lg) 0;
}


/* ============================================
   PROGRESS STEPS
   ============================================ */
.pf-steps {
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: var(--pf-spacing-2xl);
}

.pf-step {
  display: flex;
  align-items: center;
  gap: 10px;
}

.pf-step__number {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 13px;
  font-weight: 600;
  transition: var(--pf-transition-base);
}

.pf-step--pending .pf-step__number {
  background: var(--pf-accent-subtle);
  color: var(--pf-text-muted);
}

.pf-step--active .pf-step__number {
  background: var(--pf-accent);
  color: white;
}

.pf-step--completed .pf-step__number {
  background: var(--pf-success);
  color: white;
}

.pf-step__label {
  font-size: 13px;
  font-weight: 500;
  color: var(--pf-text-muted);
}

.pf-step--active .pf-step__label {
  color: var(--pf-text-primary);
}

.pf-step__connector {
  width: 48px;
  height: 1px;
  background: var(--pf-border);
  margin: 0 var(--pf-spacing-md);
}

.pf-step--completed + .pf-step__connector,
.pf-step__connector--completed {
  background: var(--pf-success);
}


/* ============================================
   SELECTION ITEMS (Bureau/Account Selection)
   ============================================ */
.pf-selection {
  display: flex;
  align-items: center;
  padding: var(--pf-spacing-md);
  border: 1px solid var(--pf-border);
  border-radius: var(--pf-radius-md);
  margin-bottom: var(--pf-spacing-sm);
  cursor: pointer;
  transition: var(--pf-transition-base);
}

.pf-selection:hover {
  border-color: var(--pf-border-hover);
  background: var(--pf-accent-subtle);
}

.pf-selection--selected {
  border-color: var(--pf-accent);
  background: var(--pf-accent-subtle);
}

.pf-selection__checkbox {
  width: 20px;
  height: 20px;
  border: 2px solid var(--pf-border);
  border-radius: var(--pf-radius-sm);
  margin-right: var(--pf-spacing-md);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  transition: var(--pf-transition-base);
}

.pf-selection--selected .pf-selection__checkbox {
  background: var(--pf-accent);
  border-color: var(--pf-accent);
  color: white;
}

.pf-selection--selected .pf-selection__checkbox::after {
  content: '✓';
  font-size: 12px;
  font-weight: 600;
}

.pf-selection__content {
  flex: 1;
  min-width: 0;
}

.pf-selection__title {
  font-size: 15px;
  font-weight: 600;
  color: var(--pf-text-primary);
  margin-bottom: 2px;
}

.pf-selection__subtitle {
  font-size: 13px;
  color: var(--pf-text-muted);
}

.pf-selection__value {
  font-size: 15px;
  font-weight: 600;
  color: var(--pf-text-primary);
}


/* ============================================
   PRICE DISPLAY
   ============================================ */
.pf-price-summary {
  background: var(--pf-accent-subtle);
  border-radius: var(--pf-radius-md);
  padding: var(--pf-spacing-lg);
  margin-top: var(--pf-spacing-lg);
}

.pf-price-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--pf-spacing-sm) 0;
}

.pf-price-row__label {
  font-size: 14px;
  color: var(--pf-text-secondary);
}

.pf-price-row__value {
  font-size: 14px;
  font-weight: 500;
  color: var(--pf-text-primary);
}

.pf-price-row--total {
  border-top: 1px solid var(--pf-border);
  margin-top: var(--pf-spacing-sm);
  padding-top: var(--pf-spacing-md);
}

.pf-price-row--total .pf-price-row__label {
  font-size: 15px;
  font-weight: 600;
  color: var(--pf-text-primary);
}

.pf-price-row--total .pf-price-row__value {
  font-size: 24px;
  font-weight: 700;
  color: var(--pf-text-primary);
}


/* ============================================
   BUTTONS
   ============================================ */
.pf-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--pf-spacing-sm);
  padding: 12px 24px;
  font-size: 14px;
  font-weight: 600;
  font-family: var(--pf-font);
  border-radius: var(--pf-radius-md);
  border: none;
  cursor: pointer;
  transition: var(--pf-transition-base);
  text-decoration: none;
}

.pf-btn--primary {
  background: var(--pf-accent);
  color: white;
}

.pf-btn--primary:hover {
  background: var(--pf-accent-hover);
  transform: translateY(-1px);
}

.pf-btn--primary:disabled {
  opacity: 0.5;
  cursor: not-allowed;
  transform: none;
}

.pf-btn--secondary {
  background: transparent;
  color: var(--pf-text-secondary);
  border: 1px solid var(--pf-border);
}

.pf-btn--secondary:hover {
  background: var(--pf-accent-subtle);
  border-color: var(--pf-border-hover);
}

.pf-btn--success {
  background: var(--pf-success);
  color: white;
}

.pf-btn--success:hover {
  background: #047857;
}

.pf-btn--block {
  width: 100%;
}


/* ============================================
   STATUS BADGES
   ============================================ */
.pf-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 10px;
  border-radius: var(--pf-radius-sm);
  font-size: 12px;
  font-weight: 500;
}

.pf-badge--success {
  background: var(--pf-success-bg);
  color: var(--pf-success);
}

.pf-badge--warning {
  background: var(--pf-warning-bg);
  color: var(--pf-warning);
}

.pf-badge--error {
  background: var(--pf-error-bg);
  color: var(--pf-error);
}

.pf-badge--info {
  background: var(--pf-info-bg);
  color: var(--pf-info);
}


/* ============================================
   ADDRESS BLOCK
   ============================================ */
.pf-address {
  background: var(--pf-accent-subtle);
  border-radius: var(--pf-radius-md);
  padding: var(--pf-spacing-md);
  border-left: 3px solid var(--pf-accent);
}

.pf-address__label {
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--pf-text-muted);
  margin-bottom: var(--pf-spacing-sm);
}

.pf-address__text {
  font-size: 14px;
  color: var(--pf-text-primary);
  line-height: 1.6;
}


/* ============================================
   FEATURE LIST
   ============================================ */
.pf-features {
  display: flex;
  gap: var(--pf-spacing-lg);
  margin-top: var(--pf-spacing-md);
  flex-wrap: wrap;
}

.pf-feature {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 13px;
  color: var(--pf-text-muted);
}

.pf-feature__icon {
  width: 16px;
  height: 16px;
  color: var(--pf-success);
}


/* ============================================
   TRUST INDICATORS
   ============================================ */
.pf-trust {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--pf-spacing-lg);
  padding: var(--pf-spacing-md);
  background: var(--pf-accent-subtle);
  border-radius: var(--pf-radius-md);
  margin-top: var(--pf-spacing-lg);
}

.pf-trust__item {
  display: flex;
  align-items: center;
  gap: var(--pf-spacing-sm);
  font-size: 13px;
  color: var(--pf-text-muted);
}

.pf-trust__icon {
  width: 16px;
  height: 16px;
}


/* ============================================
   ACTION BAR
   ============================================ */
.pf-actions {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-top: var(--pf-spacing-xl);
  padding-top: var(--pf-spacing-lg);
  border-top: 1px solid var(--pf-border);
}

.pf-actions--center {
  justify-content: center;
  gap: var(--pf-spacing-md);
}


/* ============================================
   SUCCESS STATE
   ============================================ */
.pf-success-icon {
  width: 64px;
  height: 64px;
  background: var(--pf-success-bg);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto var(--pf-spacing-lg);
}

.pf-success-icon svg {
  width: 32px;
  height: 32px;
  color: var(--pf-success);
}


/* ============================================
   HEADER COMPONENT
   ============================================ */
.pf-header {
  margin-bottom: var(--pf-spacing-xl);
}

.pf-header--center {
  text-align: center;
}


/* ============================================
   ALERTS / NOTICES
   ============================================ */
.pf-alert {
  padding: var(--pf-spacing-md);
  border-radius: var(--pf-radius-md);
  font-size: 14px;
  margin-bottom: var(--pf-spacing-md);
}

.pf-alert--success {
  background: var(--pf-success-bg);
  color: var(--pf-success);
  border: 1px solid var(--pf-success-border);
}

.pf-alert--warning {
  background: var(--pf-warning-bg);
  color: var(--pf-warning);
  border: 1px solid var(--pf-warning-border);
}

.pf-alert--error {
  background: var(--pf-error-bg);
  color: var(--pf-error);
  border: 1px solid var(--pf-error-border);
}

.pf-alert--info {
  background: var(--pf-info-bg);
  color: var(--pf-info);
  border: 1px solid var(--pf-info-border);
}


/* ============================================
   FORM ELEMENTS
   ============================================ */
.pf-input {
  width: 100%;
  padding: 12px 16px;
  font-size: 15px;
  font-family: var(--pf-font);
  border: 1px solid var(--pf-border);
  border-radius: var(--pf-radius-md);
  background: white;
  color: var(--pf-text-primary);
  transition: var(--pf-transition-base);
}

.pf-input:focus {
  outline: none;
  border-color: var(--pf-accent);
  box-shadow: 0 0 0 3px rgba(15, 23, 42, 0.1);
}

.pf-input::placeholder {
  color: var(--pf-text-muted);
}


/* ============================================
   TRACKING CARD
   ============================================ */
.pf-tracking {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--pf-spacing-md);
  background: var(--pf-accent-subtle);
  border-radius: var(--pf-radius-md);
  margin-bottom: var(--pf-spacing-sm);
}

.pf-tracking__info {
  flex: 1;
}

.pf-tracking__title {
  font-weight: 600;
  color: var(--pf-text-primary);
  margin-bottom: 2px;
}

.pf-tracking__subtitle {
  font-size: 13px;
  color: var(--pf-text-muted);
}

.pf-tracking__status {
  text-align: right;
}

.pf-tracking__number {
  font-family: var(--pf-font-mono);
  font-size: 12px;
  color: var(--pf-accent);
}

.pf-tracking__badge {
  font-size: 12px;
  color: var(--pf-success);
  margin-top: 4px;
}


/* ============================================
   LOADING STATE
   ============================================ */
.pf-loading {
  display: inline-flex;
  align-items: center;
  gap: var(--pf-spacing-sm);
}

.pf-spinner {
  width: 16px;
  height: 16px;
  border: 2px solid currentColor;
  border-right-color: transparent;
  border-radius: 50%;
  animation: pf-spin 0.6s linear infinite;
}

@keyframes pf-spin {
  to { transform: rotate(360deg); }
}


/* ============================================
   RESPONSIVE
   ============================================ */
@media (max-width: 640px) {
  .pf-container {
    padding: var(--pf-spacing-lg) var(--pf-spacing-md);
  }
  
  .pf-steps {
    flex-wrap: wrap;
    gap: var(--pf-spacing-sm);
  }
  
  .pf-step__connector {
    display: none;
  }
  
  .pf-step__label {
    display: none;
  }
  
  .pf-features {
    flex-direction: column;
    gap: var(--pf-spacing-sm);
  }
  
  .pf-trust {
    flex-direction: column;
    gap: var(--pf-spacing-sm);
  }
  
  .pf-actions {
    flex-direction: column-reverse;
    gap: var(--pf-spacing-sm);
  }
  
  .pf-btn {
    width: 100%;
  }
  
  .pf-heading-1 {
    font-size: 24px;
  }
  
  .pf-heading-2 {
    font-size: 20px;
  }
}


/* ============================================
   ACCOUNT SELECTION (for disputes)
   ============================================ */
.pf-account {
  display: flex;
  align-items: center;
  padding: var(--pf-spacing-md);
  border: 1px solid var(--pf-border);
  border-radius: var(--pf-radius-md);
  margin-bottom: var(--pf-spacing-sm);
  cursor: pointer;
  transition: var(--pf-transition-base);
}

.pf-account:hover {
  border-color: var(--pf-border-hover);
}

.pf-account--selected {
  border-color: var(--pf-accent);
  background: var(--pf-accent-subtle);
}

.pf-account--negative {
  border-left: 3px solid var(--pf-error);
}

.pf-account--neutral {
  border-left: 3px solid var(--pf-warning);
}

.pf-account--positive {
  border-left: 3px solid var(--pf-success);
}

.pf-account__check {
  width: 20px;
  height: 20px;
  border: 2px solid var(--pf-border);
  border-radius: var(--pf-radius-sm);
  margin-right: var(--pf-spacing-md);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  transition: var(--pf-transition-base);
}

.pf-account--selected .pf-account__check {
  background: var(--pf-accent);
  border-color: var(--pf-accent);
  color: white;
}

.pf-account--selected .pf-account__check::after {
  content: '✓';
  font-size: 12px;
}

.pf-account__info {
  flex: 1;
  min-width: 0;
}

.pf-account__name {
  font-size: 15px;
  font-weight: 600;
  color: var(--pf-text-primary);
  margin-bottom: 2px;
}

.pf-account__meta {
  font-size: 13px;
  color: var(--pf-text-muted);
}

.pf-account__balance {
  text-align: right;
}

.pf-account__amount {
  font-size: 15px;
  font-weight: 600;
  color: var(--pf-text-primary);
}

.pf-account__status {
  font-size: 12px;
  margin-top: 2px;
}

.pf-account__status--delinquent {
  color: var(--pf-error);
}

.pf-account__status--collection {
  color: var(--pf-warning);
}


/* ============================================
   MODAL (Premium Style)
   ============================================ */
.pf-modal-backdrop {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0, 0, 0, 0.5);
  backdrop-filter: blur(4px);
  z-index: 9999;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--pf-spacing-md);
}

.pf-modal {
  background: var(--pf-card);
  border-radius: var(--pf-radius-xl);
  width: 100%;
  max-width: 480px;
  max-height: 90vh;
  overflow-y: auto;
  box-shadow: var(--pf-shadow-xl);
  animation: pf-modal-in 0.2s ease-out;
}

@keyframes pf-modal-in {
  from {
    opacity: 0;
    transform: scale(0.95) translateY(10px);
  }
  to {
    opacity: 1;
    transform: scale(1) translateY(0);
  }
}

.pf-modal__header {
  padding: var(--pf-spacing-lg);
  border-bottom: 1px solid var(--pf-border);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.pf-modal__title {
  font-size: 18px;
  font-weight: 600;
  color: var(--pf-text-primary);
  margin: 0;
}

.pf-modal__close {
  width: 32px;
  height: 32px;
  border: none;
  background: transparent;
  color: var(--pf-text-muted);
  border-radius: var(--pf-radius-md);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: var(--pf-transition-base);
}

.pf-modal__close:hover {
  background: var(--pf-accent-subtle);
  color: var(--pf-text-primary);
}

.pf-modal__body {
  padding: var(--pf-spacing-lg);
}

.pf-modal__footer {
  padding: var(--pf-spacing-lg);
  border-top: 1px solid var(--pf-border);
  display: flex;
  gap: var(--pf-spacing-sm);
  justify-content: flex-end;
}