/* Icon System - SVG Sprite Based */
:root {
  --icon-size: 1.125rem;
  --icon-size-sm: 1rem;
  --icon-size-lg: 1.5rem;
  --icon-size-xl: 2rem;
  --icon-gap: 0.5rem;
}

/* Base Icon Styles */
.icon {
  width: var(--icon-size);
  height: var(--icon-size);
  flex: 0 0 var(--icon-size);
  vertical-align: -0.125em;
  display: inline-block;
}

.icon svg {
  width: 100%;
  height: 100%;
  fill: currentColor;
  stroke: currentColor;
  display: block;
}

/* Icon Sizes */
.icon-sm {
  width: var(--icon-size-sm);
  height: var(--icon-size-sm);
  flex: 0 0 var(--icon-size-sm);
}

.icon-lg {
  width: var(--icon-size-lg);
  height: var(--icon-size-lg);
  flex: 0 0 var(--icon-size-lg);
}

.icon-xl {
  width: var(--icon-size-xl);
  height: var(--icon-size-xl);
  flex: 0 0 var(--icon-size-xl);
}

/* With Icon Layout */
.with-icon {
  display: inline-flex;
  align-items: center;
  gap: var(--icon-gap);
}

/* Feature Lists */
.feature-list {
  list-style: none;
  padding: 0;
  margin: 0;
}

.feature-list li,
.feature-item {
  display: flex;
  align-items: center;
  gap: var(--icon-gap);
  margin-bottom: 0.5rem;
}

/* Badges */
.badge.with-icon,
.trust-indicator {
  display: inline-flex;
  align-items: center;
  gap: var(--icon-gap);
}

/* Payment Options */
.pay-option {
  display: flex;
  align-items: center;
  gap: var(--icon-gap);
  padding: 0.75rem 1rem;
  border-radius: 0.5rem;
  transition: all 0.3s ease;
  cursor: pointer;
}

.pay-option input[type="radio"] {
  margin-right: 0.5rem;
}

/* Button Icons */
.btn .icon {
  margin-right: 0.5rem;
}

.btn.with-icon {
  display: inline-flex;
  align-items: center;
  gap: var(--icon-gap);
}

/* High DPI Optimization */
@media (min-resolution: 2dppx) {
  .icon svg {
    shape-rendering: geometricPrecision;
  }
}

/* Focus States */
.pay-option:focus-within .icon,
.btn:focus .icon,
.with-icon:focus .icon {
  transform: scale(1.1);
  transition: transform 0.2s ease;
}

/* Accessibility */
.icon[aria-hidden="true"] {
  pointer-events: none;
}

/* Color Variants */
.icon-success {
  color: #28a745;
}

.icon-warning {
  color: #ffc107;
}

.icon-danger {
  color: #dc3545;
}

.icon-info {
  color: #17a2b8;
}

.icon-primary {
  color: #007bff;
}

/* Mobile Optimizations */
@media (max-width: 768px) {
  :root {
    --icon-size: 1rem;
    --icon-size-sm: 0.875rem;
    --icon-size-lg: 1.25rem;
    --icon-size-xl: 1.75rem;
    --icon-gap: 0.375rem;
  }
  
  .pay-option {
    padding: 0.625rem 0.75rem;
  }
  
  .btn .icon {
    margin-right: 0.375rem;
  }
}

/* Extra Small Devices */
@media (max-width: 480px) {
  :root {
    --icon-size: 0.875rem;
    --icon-size-sm: 0.75rem;
    --icon-size-lg: 1.125rem;
    --icon-size-xl: 1.5rem;
    --icon-gap: 0.25rem;
  }
}

/* Fallback for browsers without SVG support */
@supports not (mask: url(#test)) {
  .icon[data-fallback]::before {
    content: attr(data-fallback);
    font-size: var(--icon-size);
    line-height: 1;
  }
  
  .icon[data-fallback="check"]::before { content: "✅"; }
  .icon[data-fallback="shield"]::before { content: "🛡️"; }
  .icon[data-fallback="truck"]::before { content: "🚚"; }
  .icon[data-fallback="card"]::before { content: "💳"; }
  .icon[data-fallback="cash"]::before { content: "💵"; }
  .icon[data-fallback="bank"]::before { content: "🏦"; }
  .icon[data-fallback="phone"]::before { content: "📞"; }
  .icon[data-fallback="user"]::before { content: "👤"; }
}

/* Force icon visibility */
.icon svg {
  opacity: 1 !important;
  visibility: visible !important;
  display: block !important;
}

/* Ensure icons load immediately */
.icon {
  opacity: 1 !important;
  visibility: visible !important;
  display: inline-block !important;
}

/* Force SVG rendering */
svg {
  shape-rendering: auto !important;
}

/* Prevent icon hiding */
.icon, .icon svg, .icon use {
  opacity: 1 !important;
  visibility: visible !important;
}