/**
 * equations.css
 * Styles for EquationBlock rendering
 * WCAG 2.1 Level AA compliant
 */

/* Equation Container */
.equation-container {
    margin: 1.5rem 0;
    clear: both;
}

/* Inline equations */
.equation-inline {
    display: inline;
    margin: 0 0.25rem;
}

.equation-inline .equation-content {
    display: inline;
    vertical-align: middle;
}

/* Display equations (centered, with right-aligned number like academic papers) */
.equation-display {
    display: block;
    margin: 2rem auto;
    /* overflow-x: auto and max-width: 100% handled globally in components.css */
}

.equation-display .equation-wrapper {
    display: flex;
    justify-content: center;
    align-items: center;
    position: relative;
    width: 100%;
}

.equation-display .equation-content {
    flex: 0 1 auto;
    text-align: center;
    padding: 0.5rem 1rem;
}

/* Equation number positioned on the right */
.equation-display .equation-number {
    position: absolute;
    right: 0;
    top: 50%;
    transform: translateY(-50%);
    font-weight: 500;
    color: var(--text-tertiary);  /* Use semantic variable */
    padding: 0 1rem;
    font-size: 1rem;
}

/* On small screens, stack equation and number */
@media (max-width: 640px) {
    .equation-display .equation-wrapper {
        flex-direction: column;
        align-items: flex-end;
    }
    
    .equation-display .equation-number {
        position: static;
        transform: none;
        margin-top: 0.5rem;
    }
}

/* Equation content */
.equation-content {
    font-size: 1.1rem;
    line-height: 1.6;
}

/* Focus indicator for keyboard navigation */
.equation-content:focus {
    outline: 3px solid var(--focus-color, #0066cc);
    outline-offset: 3px;
    border-radius: 4px;
}

/* Equation caption */
.equation-caption {
    font-size: 0.9rem;
    color: var(--text-tertiary);  /* Use semantic variable */
    font-style: italic;
    text-align: center;
    margin-top: 0.5rem;
    margin-bottom: 0;
}

/* Equation caption and number colors automatically adapt via semantic variables */

/* Referenced equations (with IDs) */
.equation-container[id] {
    scroll-margin-top: 2rem; /* Offset for fixed headers */
}

/* Error state - uses semantic danger colors that adapt to dark mode */
.equation-error {
    color: var(--color-danger-text);
    background-color: var(--color-danger-bg);
    padding: 0.5rem;
    border-left: 4px solid var(--color-danger);
    display: block;
    font-family: monospace;
    font-size: 0.9rem;
}

.equation-error code {
    background-color: transparent;
    color: inherit;
    padding: 0;
}

/* Print styles */
@media print {
    .equation-container {
        page-break-inside: avoid;
    }
    
    .equation-display .equation-content {
        padding: 1rem;
    }
}

/* High contrast mode */
@media (prefers-contrast: high) {
    .equation-content {
        border: 1px solid currentColor;
        padding: 0.25rem 0.5rem;
    }
    
    .equation-caption {
        font-weight: bold;
    }
}

/* Reduced motion - no animations on equations */
@media (prefers-reduced-motion: reduce) {
    .equation-content {
        transition: none;
    }
}

/* Ensure MathML is styled appropriately */
math {
    font-size: inherit;
    line-height: inherit;
}

/* Noscript fallback styling - uses semantic variables */
.equation-content noscript {
    display: block;
    padding: 0.5rem;
    background-color: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    font-family: 'Courier New', monospace;
}

/* ==========================================
   DARK MODE OVERRIDES
   ========================================== */

[data-theme="dark"] .equation-content {
    color: var(--text-secondary);  /* Match body text for consistent reading */
}

/* MathJax SVG/output in dark mode - match body text color */
[data-theme="dark"] .MathJax,
[data-theme="dark"] .MathJax_SVG,
[data-theme="dark"] mjx-container {
    color: var(--text-secondary) !important;  /* Match body text for consistent reading */
}