/* Accessibility-specific styles */

/* High contrast mode */
body.high-contrast {
    --color-primary: #0000ff;
    --color-bg-primary: #000000;
    --color-bg-secondary: #1a1a1a;
    --color-text-primary: #ffffff;
    --color-text-secondary: #cccccc;
    --color-border: #666666;
    --color-border-focus: #00ffff;
}

/* Large text mode */
body.large-text {
    --font-size-base: 20px;
    --font-size-sm: 18px;
    --font-size-lg: 24px;
    --font-size-xl: 32px;
}

body.large-text .amount {
    font-size: 3rem;
}

body.large-text .crypto-icon {
    font-size: 2.5rem;
    width: 60px;
    height: 60px;
}

/* Screen reader mode enhancements */
body.screen-reader .sr-only {
    position: static;
    width: auto;
    height: auto;
    padding: var(--spacing-xs);
    margin: 0;
    overflow: visible;
    clip: auto;
    white-space: normal;
    border: 1px solid var(--color-border);
    background: var(--color-bg-secondary);
    font-size: var(--font-size-sm);
    color: var(--color-text-muted);
}

/* Enhanced focus indicators */
body.screen-reader *:focus {
    outline: 3px solid var(--color-border-focus);
    outline-offset: 3px;
    box-shadow: 0 0 8px rgba(37, 99, 235, 0.3);
}

/* Reduced motion for accessibility */
@media (prefers-reduced-motion: reduce) {
    * {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

/* High contrast mode support */
@media (prefers-contrast: high) {
    :root {
        --color-border: #666666;
        --color-text-secondary: #000000;
    }
}

/* Dark mode support */
@media (prefers-color-scheme: dark) {
    :root {
        --color-bg-primary: #0f172a;
        --color-bg-secondary: #1e293b;
        --color-bg-tertiary: #334155;
        --color-text-primary: #f1f5f9;
        --color-text-secondary: #cbd5e1;
        --color-border: #475569;
    }
}

/* ============================================
   Accessible Dropdown Component
   VoiceOver-compatible custom dropdown
   ============================================ */

.accessible-dropdown {
    position: relative;
    display: inline-block;
    width: 100%;
}

.dropdown-button {
    width: 100%;
    padding: 10px 40px 10px 14px;
    font-size: 1rem;
    font-family: inherit;
    text-align: left;
    background-color: #ffffff;
    color: #000000;
    border: 2px solid var(--color-border, #475569);
    border-radius: 6px;
    cursor: pointer;
    position: relative;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%23000000' d='M2 4l4 4 4-4'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 14px center;
}

.dropdown-button:hover {
    border-color: var(--color-primary, #2563eb);
}

.dropdown-button:focus {
    outline: 3px solid var(--color-primary, #2563eb);
    outline-offset: 2px;
    border-color: var(--color-primary, #2563eb);
}

.dropdown-button[aria-expanded="true"] {
    border-color: var(--color-primary, #2563eb);
    border-bottom-left-radius: 0;
    border-bottom-right-radius: 0;
}

.dropdown-listbox {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    max-height: 300px;
    overflow-y: auto;
    background-color: #ffffff;
    border: 2px solid var(--color-primary, #2563eb);
    border-top: none;
    border-bottom-left-radius: 6px;
    border-bottom-right-radius: 6px;
    list-style: none;
    margin: 0;
    padding: 0;
    z-index: 1000;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
}

.dropdown-option {
    padding: 10px 14px;
    cursor: pointer;
    color: #000000;
    background-color: #ffffff;
    border-bottom: 1px solid #e5e5e5;
}

.dropdown-option:last-child {
    border-bottom: none;
}

.dropdown-option:hover,
.dropdown-option.focused {
    background-color: #e8f0fe;
    color: #000000;
}

.dropdown-option.selected {
    background-color: var(--color-primary, #2563eb);
    color: #ffffff;
    font-weight: 600;
}

.dropdown-option.selected.focused {
    background-color: var(--color-primary-dark, #1d4ed8);
}

.dropdown-option[aria-selected="true"]::before {
    content: "\2713 ";
    margin-right: 8px;
}