/* Peppers Pay Mini - Comprehensive Design System */

/* ======================
   ROOT TOKENS
   ====================== */
:root {
  /* Spacing Scale */
  --space-1: 4px;
  --space-2: 8px;
  --space-3: 12px;
  --space-4: 16px;
  --space-5: 24px;
  --space-6: 32px;
  --space-7: 48px;
  --space-8: 64px;

  /* Typography */
  --font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
  --font-size-small: 0.75rem;      /* 12px */
  --font-size-base: 0.875rem;      /* 14px */
  --font-size-lg: 1rem;            /* 16px */
  --font-size-xl: 1.125rem;        /* 18px */
  --font-size-2xl: 1.25rem;        /* 20px */
  --font-size-3xl: 1.5rem;         /* 24px */
  --font-size-4xl: 2rem;           /* 32px */
  --font-size-5xl: 2.5rem;         /* 40px */
  --line-height-tight: 1.25;
  --line-height-normal: 1.5;
  --line-height-relaxed: 1.75;

  /* Border Radius */
  --radius-sm: 4px;    /* small tags, inputs */
  --radius-md: 8px;    /* buttons */
  --radius-lg: 12px;   /* cards, modals */
  --radius-xl: 16px;   /* large cards */

  /* Shadows */
  --shadow-subtle: 0 1px 2px rgba(0, 0, 0, 0.05);
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.1), 0 1px 2px rgba(0, 0, 0, 0.06);
  --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.07), 0 2px 4px rgba(0, 0, 0, 0.06);
  --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.1), 0 4px 6px rgba(0, 0, 0, 0.05);
  --shadow-xl: 0 20px 25px rgba(0, 0, 0, 0.1), 0 8px 10px rgba(0, 0, 0, 0.04);

  /* Transitions */
  --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-normal: 250ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 350ms cubic-bezier(0.4, 0, 0.2, 1);

  /* Z-index scale */
  --z-dropdown: 1000;
  --z-sticky: 1020;
  --z-fixed: 1030;
  --z-modal: 1040;
  --z-popover: 1050;
  --z-tooltip: 1060;

  /* Focus ring */
  --focus-ring: 0 0 0 2px var(--accent-primary);
  --focus-ring-offset: 0 0 0 2px var(--bg-primary), 0 0 0 4px var(--accent-primary);
}

/* ======================
   RESETS
   ====================== */
*, *::before, *::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

/* Dark theme (default) */
[data-theme="dark"] {
  --bg-primary: #101214;
  --bg-secondary: #1a1d21;
  --bg-tertiary: #252832;
  --bg-quaternary: #313640;
  --text-primary: #ffffff;
  --text-secondary: #a0a6b8;
  --text-muted: #6b7280;
  --text-inverse: #000000;
  
  /* Brand Colors */
  --accent-primary: #ff6934;
  --accent-secondary: #e25520;
  --accent-contrast: #e25520; /* For better contrast on small text */
  --accent-light: #ff8a5c;
  --accent-alpha: rgba(255, 105, 52, 0.12);
  
  /* Status Colors */
  --success-primary: #10b981;
  --success-secondary: #059669;
  --success-alpha: rgba(16, 185, 129, 0.12);
  --success-contrast: #065f46;
  
  --error-primary: #ef4444;
  --error-secondary: #dc2626;
  --error-alpha: rgba(239, 68, 68, 0.12);
  --error-contrast: #991b1b;
  
  --warning-primary: #f59e0b;
  --warning-secondary: #d97706;
  --warning-alpha: rgba(245, 158, 11, 0.12);
  --warning-contrast: #92400e;
  
  --info-primary: #3b82f6;
  --info-secondary: #1d4ed8;
  --info-alpha: rgba(59, 130, 246, 0.12);
  --info-contrast: #1e3a8a;
  
  /* Border & Surface */
  --border-primary: #374151;
  --border-secondary: #4b5563;
  --border-tertiary: #6b7280;
  --overlay-bg: rgba(0, 0, 0, 0.6);
  --overlay-light: rgba(0, 0, 0, 0.3);
  --glass-bg: rgba(16, 18, 20, 0.8);
}

/* Light theme */
[data-theme="light"] {
  --bg-primary: #ffffff;
  --bg-secondary: #f9fafb;
  --bg-tertiary: #f3f4f6;
  --bg-quaternary: #e5e7eb;
  --text-primary: #111827;
  --text-secondary: #6b7280;
  --text-muted: #9ca3af;
  --text-inverse: #ffffff;
  
  /* Brand Colors */
  --accent-primary: #ff6934;
  --accent-secondary: #e25520;
  --accent-contrast: #c44515; /* Darker for better contrast */
  --accent-light: #ff8a5c;
  --accent-alpha: rgba(255, 105, 52, 0.08);
  
  /* Status Colors */
  --success-primary: #10b981;
  --success-secondary: #059669;
  --success-alpha: rgba(16, 185, 129, 0.08);
  --success-contrast: #065f46;
  
  --error-primary: #ef4444;
  --error-secondary: #dc2626;
  --error-alpha: rgba(239, 68, 68, 0.08);
  --error-contrast: #991b1b;
  
  --warning-primary: #f59e0b;
  --warning-secondary: #d97706;
  --warning-alpha: rgba(245, 158, 11, 0.08);
  --warning-contrast: #92400e;
  
  --info-primary: #3b82f6;
  --info-secondary: #1d4ed8;
  --info-alpha: rgba(59, 130, 246, 0.08);
  --info-contrast: #1e3a8a;
  
  /* Border & Surface */
  --border-primary: #e5e7eb;
  --border-secondary: #d1d5db;
  --border-tertiary: #9ca3af;
  --overlay-bg: rgba(255, 255, 255, 0.9);
  --overlay-light: rgba(255, 255, 255, 0.6);
  --glass-bg: rgba(255, 255, 255, 0.8);
}

/* Auto theme based on system preference */
@media (prefers-color-scheme: light) {
  html:not([data-theme]) {
    --bg-primary: #ffffff;
    --bg-secondary: #f9fafb;
    --bg-tertiary: #f3f4f6;
    --bg-quaternary: #e5e7eb;
    --text-primary: #111827;
    --text-secondary: #6b7280;
    --text-muted: #9ca3af;
    --text-inverse: #ffffff;
    --accent-primary: #ff6934;
    --accent-secondary: #e25520;
    --accent-contrast: #c44515;
    --accent-light: #ff8a5c;
    --accent-alpha: rgba(255, 105, 52, 0.08);
    --success-primary: #10b981;
    --success-secondary: #059669;
    --success-alpha: rgba(16, 185, 129, 0.08);
    --error-primary: #ef4444;
    --error-secondary: #dc2626;
    --error-alpha: rgba(239, 68, 68, 0.08);
    --warning-primary: #f59e0b;
    --warning-secondary: #d97706;
    --warning-alpha: rgba(245, 158, 11, 0.08);
    --border-primary: #e5e7eb;
    --border-secondary: #d1d5db;
    --border-tertiary: #9ca3af;
    --overlay-bg: rgba(255, 255, 255, 0.9);
    --overlay-light: rgba(255, 255, 255, 0.6);
    --glass-bg: rgba(255, 255, 255, 0.8);
  }
}

/* ======================
   UTILITIES
   ====================== */

/* Typography */
.text-title {
  font-size: var(--font-size-3xl);
  font-weight: 600;
  line-height: var(--line-height-tight);
  letter-spacing: -0.025em;
}

.text-subtitle {
  font-size: var(--font-size-xl);
  font-weight: 500;
  line-height: var(--line-height-normal);
}

.text-body {
  font-size: var(--font-size-base);
  line-height: var(--line-height-normal);
}

.text-small {
  font-size: var(--font-size-small);
  line-height: var(--line-height-normal);
}

.text-subtle {
  color: var(--text-secondary);
}

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

/* State utilities */
.is-hidden {
  display: none !important;
}

.is-active {
  /* Component-specific active styles applied via other classes */
}

.is-disabled {
  opacity: 0.5;
  cursor: not-allowed;
  pointer-events: none;
}

.is-loading {
  position: relative;
  overflow: hidden;
}

/* Screen reader only */
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

/* ======================
   LAYOUT
   ====================== */

/* Base styles */
html, body {
  font-family: var(--font-family);
  background: var(--bg-primary);
  color: var(--text-primary);
  height: 100%;
  overflow: hidden;
  line-height: var(--line-height-normal);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

.mini-root {
  display: flex;
  flex-direction: column;
  height: 100vh;
  width: 100vw;
  position: relative;
}

/* Focus management */
*:focus {
  outline: none;
}

*:focus-visible {
  outline: 2px solid var(--accent-primary);
  outline-offset: 2px;
}

/* ======================
   COMPONENTS
   ====================== */

/* Topbar */
.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-4);
  background: var(--bg-secondary);
  border-bottom: 1px solid var(--border-primary);
  flex-shrink: 0;
  min-height: 64px; /* Ensure consistent height */
}

.topbar .left,
.topbar .right {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

.brand {
  font-size: var(--font-size-2xl);
  font-weight: 600;
  color: var(--text-primary);
  letter-spacing: -0.025em;
}

/* Icon buttons */
.icon-btn {
  background: none;
  border: none;
  color: var(--text-secondary);
  cursor: pointer;
  padding: var(--space-2);
  border-radius: var(--radius-sm);
  transition: all var(--transition-fast);
  font-size: var(--font-size-xl);
  min-height: 40px; /* Ensure tap target */
  min-width: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.icon-btn:hover {
  background: var(--bg-tertiary);
  color: var(--text-primary);
  transform: translateY(-1px);
}

.icon-btn:active {
  transform: translateY(0);
  opacity: 0.8;
}

.icon-btn:focus-visible {
  box-shadow: var(--focus-ring);
}

/* Viewport */
.viewport {
  flex: 1;
  position: relative;
  overflow: hidden;
}

/* Screen management */
.screen {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: var(--space-6);
  opacity: 0;
  visibility: hidden;
  transform: translateX(20px);
  transition: all var(--transition-normal);
  min-height: 400px; /* Prevent layout jumps */
}

.screen.is-active {
  opacity: 1;
  visibility: visible;
  transform: translateX(0);
}

/* ======================
   BUTTONS
   ====================== */

.btn {
  background: none;
  border: 1px solid var(--border-primary);
  color: var(--text-primary);
  padding: var(--space-3) var(--space-5);
  border-radius: var(--radius-md);
  cursor: pointer;
  font-size: var(--font-size-base);
  font-weight: 500;
  transition: all var(--transition-fast);
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  min-height: 44px; /* Ensure tap target */
  line-height: 1;
  white-space: nowrap;
  position: relative;
  overflow: hidden;
}

.btn:hover {
  background: var(--bg-tertiary);
  border-color: var(--border-secondary);
  transform: translateY(-1px);
  box-shadow: var(--shadow-sm);
}

.btn:active {
  transform: translateY(0);
  box-shadow: none;
}

.btn:focus-visible {
  box-shadow: var(--focus-ring-offset);
}

.btn:disabled,
.btn.is-disabled {
  opacity: 0.5;
  cursor: not-allowed;
  transform: none;
  box-shadow: none;
  pointer-events: none;
}

/* Button variants */
.btn--primary {
  background: var(--accent-primary);
  border-color: var(--accent-primary);
  color: var(--text-inverse);
  font-weight: 600;
}

.btn--primary:hover {
  background: var(--accent-secondary);
  border-color: var(--accent-secondary);
  box-shadow: var(--shadow-md);
}

.btn--ghost {
  border: none;
  background: none;
  color: var(--text-secondary);
}

.btn--ghost:hover {
  background: var(--bg-tertiary);
  color: var(--text-primary);
}

.btn--subtle {
  border: none;
  background: var(--bg-tertiary);
  color: var(--text-primary);
}

.btn--subtle:hover {
  background: var(--bg-quaternary);
}

/* Button sizes */
.btn--sm {
  padding: var(--space-2) var(--space-4);
  font-size: var(--font-size-small);
  min-height: 36px;
}

.btn--lg {
  padding: var(--space-4) var(--space-6);
  font-size: var(--font-size-lg);
  min-height: 52px;
}

/* Text buttons for secondary actions */
.text-btn {
  background: none;
  border: none;
  color: var(--accent-primary);
  cursor: pointer;
  text-decoration: underline;
  font-size: var(--font-size-base);
  padding: var(--space-2) 0;
  transition: color var(--transition-fast);
  min-height: 40px; /* Ensure tap target */
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
}

.text-btn:hover {
  color: var(--accent-secondary);
}

.text-btn:focus-visible {
  outline: 2px solid var(--accent-primary);
  outline-offset: 2px;
}

.text-btn--small {
  font-size: var(--font-size-small);
  min-height: 36px;
}

/* Button groups */
.button-group {
  display: flex;
  gap: var(--space-3);
  justify-content: center;
  flex-wrap: wrap;
}

.actions-row {
  display: flex;
  gap: var(--space-3);
  justify-content: center;
  flex-wrap: wrap;
  width: 100%;
  max-width: 400px;
}

.actions-col {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  width: 100%;
  max-width: 400px;
}

/* ======================
   SPINNER COMPONENT
   ====================== */

.spinner {
  width: 40px;
  height: 40px;
  border: 3px solid transparent;
  border-top: 3px solid var(--accent-primary);
  border-radius: 50%;
  animation: spin 1.2s linear infinite;
  margin: 0 auto;
}

.spinner--sm {
  width: 24px;
  height: 24px;
  border-width: 2px;
}

.spinner--lg {
  width: 60px;
  height: 60px;
  border-width: 4px;
}

/* Pulse variant for reduced motion */
@media (prefers-reduced-motion: reduce) {
  .spinner {
    animation: pulse 2s ease-in-out infinite;
    border-top-color: transparent;
    border: 3px solid var(--accent-primary);
  }
  
  @keyframes pulse {
    0%, 100% { opacity: 0.4; transform: scale(0.95); }
    50% { opacity: 1; transform: scale(1); }
  }
}

@keyframes spin {
  0% { transform: rotate(0deg); }
  100% { transform: rotate(360deg); }
}

/* ======================
   MODAL & OVERLAY
   ====================== */

.overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: var(--overlay-bg);
  backdrop-filter: blur(8px);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: var(--z-modal);
  opacity: 1;
  transition: opacity var(--transition-normal);
}

.overlay.is-hidden {
  opacity: 0;
  pointer-events: none;
}

.overlay--auth {
  /* Auth-specific overlay styles */
}

.modal {
  background: var(--bg-primary);
  border: 1px solid var(--border-primary);
  border-radius: var(--radius-lg);
  padding: var(--space-6);
  box-shadow: var(--shadow-xl);
  max-width: 90vw;
  max-height: 90vh;
  overflow-y: auto;
  transform: scale(0.95);
  transition: transform var(--transition-normal);
}

.overlay:not(.is-hidden) .modal {
  transform: scale(1);
}

/* ======================
   CARDS
   ====================== */

.card {
  background: var(--bg-primary);
  border: 1px solid var(--border-primary);
  border-radius: var(--radius-lg);
  padding: var(--space-6);
  box-shadow: var(--shadow-sm);
}

.card--state {
  text-align: center;
  max-width: 400px;
  width: 100%;
}

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

/* State indicators */
.state-icon {
  font-size: 4rem;
  margin-bottom: var(--space-4);
  display: block;
  line-height: 1;
}

.state-icon--success {
  color: var(--success-primary);
}

.state-icon--error {
  color: var(--error-primary);
}

.state-icon--warning {
  color: var(--warning-primary);
}

.state-icon--info {
  color: var(--info-primary);
}

.state-icon--clock {
  color: var(--warning-primary);
}

.tasks-limit-timer {
  font-size: var(--font-size-4xl);
  font-weight: 700;
  color: var(--warning-primary);
  margin: var(--space-4) 0;
  text-align: center;
  font-family: monospace;
}

/* ======================
   SCANNER COMPONENT
   ====================== */

.scanner {
  width: 100%;
  max-width: 400px;
  text-align: center;
}

.scanner__title {
  font-size: var(--font-size-3xl);
  font-weight: 600;
  margin-bottom: var(--space-5);
  color: var(--text-primary);
  display: none;
}

.scanner__stage {
  position: relative;
  margin-bottom: var(--space-5);
}

.scanner__frame {
  position: relative;
  width: 100%;
  aspect-ratio: 1;
  background: var(--bg-secondary);
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 2px solid var(--border-primary);
}

.scanner__video {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.scanner__overlay {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: linear-gradient(
    to bottom,
    rgba(0, 0, 0, 0.3) 0%,
    transparent 25%,
    transparent 75%,
    rgba(0, 0, 0, 0.3) 100%
  );
  pointer-events: none;
}

.scanner__target {
  position: absolute;
  top: 50%;
  left: 50%;
  width: 60%;
  height: 60%;
  transform: translate(-50%, -50%);
  border: 2px solid var(--accent-primary);
  border-radius: var(--radius-md);
  pointer-events: none;
  opacity: 0.8;
}

.scanner__corners {
  position: absolute;
  top: 50%;
  left: 50%;
  width: 60%;
  height: 60%;
  transform: translate(-50%, -50%);
  pointer-events: none;
}

.scanner__corners::before,
.scanner__corners::after {
  content: '';
  position: absolute;
  width: var(--space-5);
  height: var(--space-5);
  border: 3px solid var(--accent-primary);
}

.scanner__corners::before {
  top: -3px;
  left: -3px;
  border-right: none;
  border-bottom: none;
  border-radius: var(--radius-sm) 0 0 0;
}

.scanner__corners::after {
  bottom: -3px;
  right: -3px;
  border-left: none;
  border-top: none;
  border-radius: 0 0 var(--radius-sm) 0;
}

/* Additional corner markers using pseudo elements on container */
.scanner__corners {
  --corner-size: var(--space-5);
  --corner-thickness: 3px;
}

.scanner__corners::before {
  box-shadow: 
    calc(var(--corner-size) * 11) 0 0 0 var(--accent-primary), /* top-right */
    0 calc(var(--corner-size) * 11) 0 0 var(--accent-primary), /* bottom-left */
    calc(var(--corner-size) * 11) calc(var(--corner-size) * 11) 0 0 var(--accent-primary); /* bottom-right */
}

.scanner__hint {
  color: var(--text-secondary);
  margin-bottom: var(--space-5);
  font-size: var(--font-size-base);
}

.scanner__actions {
  display: flex;
  gap: var(--space-3);
  justify-content: center;
  flex-wrap: wrap;
}

.scanner__status {
  margin-top: var(--space-4);
  font-size: var(--font-size-base);
  color: var(--text-secondary);
  min-height: 1.5rem; /* Prevent layout shift */
}

/* Camera error state */
.scanner__error {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  height: 100%;
  padding: var(--space-6);
  color: var(--text-secondary);
}

.scanner__error-icon {
  font-size: 3rem;
  margin-bottom: var(--space-4);
  color: var(--error-primary);
}

.scanner__error-message {
  text-align: center;
  margin-bottom: var(--space-5);
  font-size: var(--font-size-base);
}

/* ======================
   PAYMENT DETAILS
   ====================== */

.section-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  max-width: 400px;
  margin-bottom: var(--space-6);
  gap: var(--space-4);
  display: none;
}

.section-head__title {
  font-size: var(--font-size-3xl);
  font-weight: 600;
  margin: 0;
  flex: 1;
}

.payment-focus {
  text-align: center;
  margin-bottom: var(--space-6);
  padding: var(--space-6);
  background: var(--bg-secondary);
  border-radius: var(--radius-lg);
  border: 1px solid var(--border-primary);
}

.amount-rub {
  font-size: var(--font-size-5xl);
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: var(--space-2);
  line-height: var(--line-height-tight);
}

.amount-pep {
  font-size: var(--font-size-2xl);
  color: var(--warning-primary);
  font-weight: 600;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
}

.pepper {
  font-size: var(--font-size-xl);
}

/* Info list for payment details */
.info-list {
  list-style: none;
  width: 100%;
  max-width: 400px;
  margin-bottom: var(--space-6);
  background: var(--bg-secondary);
  border-radius: var(--radius-lg);
  border: 1px solid var(--border-primary);
  overflow: hidden;
}

.info-list__item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--space-4);
  border-bottom: 1px solid var(--border-primary);
}

.info-list__item:last-child {
  border-bottom: none;
}

.info-list__label {
  color: var(--text-secondary);
  font-size: var(--font-size-base);
  font-weight: 500;
}

.info-list__value {
  font-weight: 600;
  text-align: right;
  color: var(--text-primary);
}

.info-list__value--mono {
  font-family: 'SF Mono', 'Monaco', 'Inconsolata', 'Roboto Mono', monospace;
  font-size: var(--font-size-small);
  color: var(--text-secondary);
}

/* Warning messages */
.warning {
  background: var(--warning-alpha);
  border: 1px solid var(--warning-primary);
  color: var(--warning-contrast);
  padding: var(--space-4);
  border-radius: var(--radius-lg);
  margin-bottom: var(--space-6);
  font-size: var(--font-size-base);
  text-align: center;
  width: 100%;
  max-width: 400px;
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

.warning::before {
  content: '⚠️';
  font-size: var(--font-size-lg);
  flex-shrink: 0;
}

/* ======================
   PROCESSING & SUCCESS/ERROR STATES
   ====================== */

.state-box {
  text-align: center;
  max-width: 400px;
  width: 100%;
  padding: var(--space-6);
  background: var(--bg-secondary);
  border: 1px solid var(--border-primary);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
}

.state-box__title {
  font-size: var(--font-size-3xl);
  font-weight: 600;
  margin-bottom: var(--space-4);
  color: var(--text-primary);
  margin-top: 1em;
}

.state-box__hint {
  color: var(--text-secondary);
  margin-bottom: var(--space-6);
  font-size: var(--font-size-base);
  line-height: var(--line-height-relaxed);
}

.final-amount {
  font-size: var(--font-size-4xl);
  font-weight: 700;
  color: var(--success-primary);
  margin-bottom: var(--space-7);
  line-height: var(--line-height-tight);
}

.error-text {
  color: var(--error-primary);
  margin-bottom: var(--space-4);
  font-size: var(--font-size-base);
  padding: var(--space-4);
  background: var(--error-alpha);
  border-radius: var(--radius-md);
  border: 1px solid var(--error-primary);
}

/* ======================
   ANIMATIONS
   ====================== */

/* Fade in animation for screens */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* Modal scale animation */
@keyframes modalIn {
  from {
    opacity: 0;
    transform: scale(0.95) translateY(-20px);
  }
  to {
    opacity: 1;
    transform: scale(1) translateY(0);
  }
}

/* Button pulse for loading states */
@keyframes buttonPulse {
  0%, 100% {
    opacity: 1;
  }
  50% {
    opacity: 0.7;
  }
}

.is-loading .btn {
  animation: buttonPulse 2s ease-in-out infinite;
}

/* ======================
   RESPONSIVE DESIGN
   ====================== */

@media (max-width: 480px) {
  .topbar {
    padding: var(--space-3);
  }
  
  .screen {
    padding: var(--space-4);
  }
  
  .brand {
    font-size: var(--font-size-xl);
  }
  
  .amount-rub {
    font-size: var(--font-size-4xl);
  }
  
  .actions-col {
    max-width: none;
  }
  
  .modal {
    padding: var(--space-4);
    margin: var(--space-4);
  }
  
  .scanner__title {
    font-size: var(--font-size-2xl);
  }
  
  .state-icon {
    font-size: 3rem;
  }
  
  .button-group {
    flex-direction: column;
  }
  
  .section-head {
    flex-direction: column;
    align-items: stretch;
    gap: var(--space-3);
  }
}

@media (max-width: 360px) {
  .topbar {
    padding: var(--space-2);
  }
  
  .topbar .left,
  .topbar .right {
    gap: var(--space-2);
  }
  
  .brand {
    font-size: var(--font-size-lg);
  }
  
  .icon-btn {
    min-width: 36px;
    min-height: 36px;
    padding: var(--space-1);
  }
  
  .btn {
    min-height: 40px;
    padding: var(--space-2) var(--space-4);
  }
}

/* ======================
   ACCESSIBILITY & REDUCED MOTION
   ====================== */

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
  
  .screen {
    transition: opacity var(--transition-fast);
    transform: none;
  }
  
  .screen.is-active {
    transform: none;
  }
  
  .btn:hover {
    transform: none;
  }
  
  .icon-btn:hover {
    transform: none;
  }
  
  .modal {
    transform: none;
  }
}

/* High contrast mode support */
@media (prefers-contrast: high) {
  .btn {
    border-width: 2px;
  }
  
  .btn--primary {
    border: 2px solid var(--text-inverse);
  }
  
  .overlay {
    backdrop-filter: none;
    background: rgba(0, 0, 0, 0.9);
  }
  
  [data-theme="light"] .overlay {
    background: rgba(255, 255, 255, 0.95);
  }
}

/* Focus visible improvements for better keyboard navigation */
.btn:focus-visible,
.icon-btn:focus-visible,
.text-btn:focus-visible {
  outline: 2px solid var(--accent-primary);
  outline-offset: 2px;
  z-index: 1;
}

/* ======================
   LEGACY CLASS SUPPORT
   ====================== */

/* Map old class names to new ones for backward compatibility */
.hidden {
  display: none !important;
}

.active {
  /* This will be handled by .is-active in JavaScript */
}

/* Legacy overlay classes */
.auth-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: var(--overlay-bg);
  backdrop-filter: blur(8px);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: var(--z-modal);
  opacity: 1;
  transition: opacity var(--transition-normal);
}

.auth-overlay.hidden {
  opacity: 0;
  pointer-events: none;
}

.auth-overlay .state-box {
  background: var(--bg-primary);
  border: 1px solid var(--border-primary);
  border-radius: var(--radius-lg);
  padding: var(--space-6);
  box-shadow: var(--shadow-xl);
  max-width: 90vw;
  max-height: 90vh;
  overflow-y: auto;
  transform: scale(0.95);
  transition: transform var(--transition-normal);
}

.auth-overlay:not(.hidden) .state-box {
  transform: scale(1);
}

.auth-spinner {
  width: 40px;
  height: 40px;
  border: 3px solid transparent;
  border-top: 3px solid var(--accent-primary);
  border-radius: 50%;
  animation: spin 1.2s linear infinite;
  margin: 0 auto var(--space-5);
}

.auth-status {
  font-size: var(--font-size-xl);
  margin-bottom: var(--space-4);
  color: var(--text-secondary);
}

.auth-actions {
  display: flex;
  gap: var(--space-3);
  justify-content: center;
  flex-wrap: wrap;
  margin-top: var(--space-5);
}

/* Legacy scanner classes */
.scan-wrapper {
  width: 100%;
  max-width: 400px;
  text-align: center;
}

.scan-title {
  font-size: var(--font-size-3xl);
  font-weight: 600;
  margin-bottom: var(--space-5);
  color: var(--text-primary);
}

.scan-stage {
  position: relative;
  margin-bottom: var(--space-5);
}

.scan-frame {
  position: relative;
  width: 100%;
  aspect-ratio: 1;
  background: var(--bg-secondary);
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 2px solid var(--border-primary);
}

#video {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.scan-overlay {
  position: absolute;
  top: 50%;
  left: 50%;
  width: 60%;
  height: 60%;
  transform: translate(-50%, -50%);
  border: 2px solid var(--accent-primary);
  border-radius: var(--radius-md);
  pointer-events: none;
  opacity: 0.8;
}

.scan-overlay::before,
.scan-overlay::after {
  content: '';
  position: absolute;
  width: var(--space-5);
  height: var(--space-5);
  border: 3px solid var(--accent-primary);
}

.scan-overlay::before {
  top: -3px;
  left: -3px;
  border-right: none;
  border-bottom: none;
  border-radius: var(--radius-sm) 0 0 0;
}

.scan-overlay::after {
  bottom: -3px;
  right: -3px;
  border-left: none;
  border-top: none;
  border-radius: 0 0 var(--radius-sm) 0;
}

.scan-hint {
  color: var(--text-secondary);
  margin-bottom: var(--space-5);
  font-size: var(--font-size-base);
}

.scan-actions {
  display: flex;
  gap: var(--space-3);
  justify-content: center;
  flex-wrap: wrap;
}

.inline-status {
  margin-top: var(--space-4);
  font-size: var(--font-size-base);
  color: var(--text-secondary);
  min-height: 1.5rem;
}

/* Legacy spinner */
.ring {
  width: 60px;
  height: 60px;
  border: 4px solid transparent;
  border-top: 4px solid var(--accent-primary);
  border-radius: 50%;
  margin: 0 auto var(--space-5);
  animation: spin 1.2s linear infinite;
}

/* Legacy state icons */
.state-icon.success {
  color: var(--success-primary);
}

.state-icon.error {
  color: var(--error-primary);
}

/* Legacy button styles */
.btn.primary {
  background: var(--accent-primary);
  border-color: var(--accent-primary);
  color: var(--text-inverse);
  font-weight: 600;
}

.btn.primary:hover {
  background: var(--accent-secondary);
  border-color: var(--accent-secondary);
  box-shadow: var(--shadow-md);
}

.btn.ghost {
  border: none;
  background: none;
  color: var(--text-secondary);
}

.btn.ghost:hover {
  background: var(--bg-tertiary);
  color: var(--text-primary);
}

.btn.subtle {
  border: none;
  background: var(--bg-tertiary);
  color: var(--text-primary);
}

.btn.subtle:hover {
  background: var(--bg-quaternary);
}

.btn.small {
  padding: var(--space-2) var(--space-4);
  font-size: var(--font-size-small);
  min-height: 36px;
}

.text-btn.small {
  font-size: var(--font-size-small);
  min-height: 36px;
}

/* Legacy info list */
.info-list li {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--space-4);
  border-bottom: 1px solid var(--border-primary);
}

.info-list li:last-child {
  border-bottom: none;
}

.label {
  color: var(--text-secondary);
  font-size: var(--font-size-base);
  font-weight: 500;
}

.value {
  font-weight: 600;
  text-align: right;
  color: var(--text-primary);
}

.value.mono {
  font-family: 'SF Mono', 'Monaco', 'Inconsolata', 'Roboto Mono', monospace;
  font-size: var(--font-size-small);
  color: var(--text-secondary);
}

.section-head h2 {
  font-size: var(--font-size-3xl);
  font-weight: 600;
  margin: 0;
  flex: 1;
}

.state-box h3 {
  font-size: var(--font-size-3xl);
  font-weight: 600;
  margin-bottom: var(--space-4);
  color: var(--text-primary);
}

.state-box .hint {
  color: var(--text-secondary);
  margin-bottom: var(--space-6);
  font-size: var(--font-size-base);
  line-height: var(--line-height-relaxed);
}

.balance-rub-pill {
  font-weight: 500;
  letter-spacing: .25px;
  background: linear-gradient(var(--bg-tertiary), var(--bg-tertiary));
  color: var(--text-secondary);
  padding: 3px 10px 4px;
  border-radius: var(--radius-md);
  font-size: var(--font-size-small);
  line-height: 1.1;
  position: relative;
  box-shadow:
    inset 0 2px 4px rgba(0,0,0,0.55),
    inset 0 -1px 2px rgba(255,255,255,0.04),
    0 0 0 1px var(--border-primary);
  transition: background var(--transition-normal), color var(--transition-fast);
}
[data-theme="light"] .balance-rub-pill {
  box-shadow:
    inset 0 2px 4px rgba(0,0,0,0.08),
    inset 0 -1px 2px rgba(255,255,255,0.5),
    0 0 0 1px var(--border-secondary);
  background: linear-gradient(var(--bg-tertiary), var(--bg-secondary));
  color: var(--text-muted);
}
.balance-rub-pill::before {
  content: '≈';
  font-weight: 600;
  margin-right: 3px;
  opacity:.9;
}
@media (hover:hover) {
  .balance-rub-pill:hover {
    background: var(--bg-quaternary);
    color: var(--text-primary);
  }
}

/* Success meta lines (legacy simple) */
.success-meta {
  display: flex;
  flex-direction: column;
  gap: 4px;
  margin: 8px 0 12px;
  font-size: var(--font-size-base);
}
.success-line {
  color: var(--text-secondary);
  font-weight: 500;
  text-align: center;
}
.success-line strong {
  color: var(--text-primary);
  font-weight: 600;
}

/* Enhanced success breakdown (new) */
.success-breakdown {
  width:100%;
  max-width:360px;
  margin:0 auto var(--space-5);
  display:flex;
  flex-direction:column;
  gap:8px;
  text-align:left;
}
.success-breakdown .success-line {
  display:flex;
  align-items:center;
  justify-content:space-between;
  background:var(--bg-secondary);
  border:1px solid var(--border-primary);
  padding:8px 12px;
  border-radius:var(--radius-md);
  font-size:var(--font-size-base);
  text-align:left;
  color:var(--text-secondary);
  font-weight:500;
}
.success-breakdown .success-line .sl-label { color:var(--text-secondary); font-weight:500; }
.success-breakdown .success-line .sl-value { font-weight:600; color:var(--text-primary); display:flex; gap:6px; flex-wrap:wrap; }

@media (max-width:480px){
  .success-breakdown .success-line {
    font-size:0.8rem;
    padding:6px 10px;
  }
}

/* ======================
   FIREWORKS / CONFETTI
   ====================== */

.fireworks-layer {
  position: absolute;
  inset: 0;
  pointer-events: none;
  overflow: hidden;
  border-radius: inherit;
  z-index: 2;
  mix-blend-mode:screen;
}

.fireworks-layer .fw {
  position: absolute;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background:
     radial-gradient(circle at 30% 30%, #fff, rgba(255,255,255,0)),
     var(--accent-primary);
  animation: fw-pop 1200ms ease-out forwards;
  opacity: 0;
}

.fireworks-layer .fw.pep {
  background:
    radial-gradient(circle at 30% 30%, #fff, rgba(255,255,255,0)),
    #ff6934;
}
.fireworks-layer .fw.green { background: radial-gradient(circle at 30% 30%, #fff, rgba(255,255,255,0)), #10b981; }
.fireworks-layer .fw.gold { background: radial-gradient(circle at 30% 30%, #fff, rgba(255,255,255,0)), #f59e0b; }
.fireworks-layer .fw.pink { background: radial-gradient(circle at 30% 30%, #fff, rgba(255,255,255,0)), #ec4899; }

/* Alternative confetti pieces (added for extended effect) */
.confetti-piece {
  position:absolute;
  width:10px; height:10px;
  background:var(--accent-primary);
  top:50%; left:50%;
  border-radius:2px;
  opacity:0;
  animation:confettiFly 1400ms ease-out forwards;
  transform-origin:center;
}
.confetti-piece.alt1 { background:var(--success-primary); }
.confetti-piece.alt2 { background:var(--warning-primary); }
.confetti-piece.alt3 { background:var(--accent-light); }
.confetti-piece.alt4 { background:var(--info-primary); }

@keyframes confettiFly {
  0% { opacity:0; transform:translate(-50%,-50%) scale(.4) rotate(0deg); }
  15% { opacity:1; }
  70% { opacity:1; }
  100% {
    opacity:0;
    transform:
      translate(var(--tx, 0), var(--ty, -160px))
      rotate(var(--rot, 180deg))
      scale(.6);
  }
}

@keyframes fw-pop {
  0% { transform: translate(0,0) scale(.3); opacity:0; }
  10% { opacity:1; }
  55% { opacity:1; }
  100% { transform: translate(var(--dx), var(--dy)) scale(0.2); opacity:0; }
}

/* Slight highlight when fireworks active */
.screen.is-active #successFireworks:has(.fw) + .state-box__hint,
#successFireworks:has(.fw) {
  filter: saturate(1.08);
}

/* Reduced motion */
@media (prefers-reduced-motion: reduce) {
  .confetti-piece,
  .fireworks-layer .fw {
    animation:none;
    opacity:.25;
    transform:none;
  }
}

/* ======================
   Динамические смешные подписи
   ====================== */
@keyframes pulse-text {
  0% { opacity: .7; }
  50% { opacity: 1; }
  100% { opacity: .7; }
}
.processing-fun {
  animation: pulse-text 3s ease-in-out infinite;
}

/* ======================
   RESPONSIVE DESIGN
   ====================== */

@media (max-width: 480px) {
  .topbar {
    padding: var(--space-3);
  }
  
  .screen {
    padding: var(--space-4);
  }
  
  .brand {
    font-size: var(--font-size-xl);
  }
  
  .amount-rub {
    font-size: var(--font-size-4xl);
  }
  
  .actions-col {
    max-width: none;
  }
  
  .modal {
    padding: var(--space-4);
    margin: var(--space-4);
  }
  
  .scanner__title {
    font-size: var(--font-size-2xl);
  }
  
  .state-icon {
    font-size: 3rem;
  }
  
  .button-group {
    flex-direction: column;
  }
  
  .section-head {
    flex-direction: column;
    align-items: stretch;
    gap: var(--space-3);
  }
}

@media (max-width: 360px) {
  .topbar {
    padding: var(--space-2);
  }
  
  .topbar .left,
  .topbar .right {
    gap: var(--space-2);
  }
  
  .brand {
    font-size: var(--font-size-lg);
  }
  
  .icon-btn {
    min-width: 36px;
    min-height: 36px;
    padding: var(--space-1);
  }
  
  .btn {
    min-height: 40px;
    padding: var(--space-2) var(--space-4);
  }
}

/* =========================================================
   ДОБАВЛЕНО: SUCCESS расширенный вывод и анимация
   ========================================================= */
.fireworks-layer .fw {
  position: absolute;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background:
     radial-gradient(circle at 30% 30%, #fff, rgba(255,255,255,0)),
     var(--accent-primary);
  animation: fw-pop 1200ms ease-out forwards;
  opacity: 0;
  mix-blend-mode: screen;
}

/* Slight highlight around success card when fireworks active */
.screen.is-active #successFireworks:has(.fw) + .state-box__hint,
#successFireworks:has(.fw) {
  filter: saturate(1.08);
}

/* =========================================================
   ДОБАВЛЕНО: Динамические смешные подписи (микро-анимация)
   ========================================================= */
.processing-fun {
  animation: pulse-text 3s ease-in-out infinite;
}