/**
 * Accessibility Styles for dashboardr
 *
 * Provides skip-to-content link, focus indicators, reduced motion support,
 * and high-contrast enhancements for WCAG 2.1 AA compliance.
 */

/* =========================================================
 * Skip-to-content link
 * Visible only when focused (keyboard navigation)
 * ========================================================= */
.dashboardr-skip-link {
  position: absolute;
  top: -100%;
  left: 0;
  z-index: 999999;
  padding: 8px 16px;
  background: #0d6efd;
  color: #fff;
  font-size: 14px;
  font-weight: 600;
  text-decoration: none;
  border-radius: 0 0 4px 0;
  transition: top 0.15s ease;
}

.dashboardr-skip-link:focus {
  top: 0;
  outline: 3px solid #ffc107;
  outline-offset: 0;
}

/* =========================================================
 * Focus indicators
 * Ensure :focus-visible outlines on all interactive elements
 * ========================================================= */

/* Tabs */
[role="tab"]:focus-visible {
  outline: 2px solid #0d6efd;
  outline-offset: 2px;
  border-radius: 2px;
}

/* Inputs (select, checkbox, radio, etc.) */
.dashboardr-input:focus-visible,
.dashboardr-input-group select:focus-visible,
.dashboardr-input-group input:focus-visible,
.dashboardr-btn-group .dashboardr-btn:focus-visible {
  outline: 2px solid #0d6efd;
  outline-offset: 2px;
}

/* Modal close button */
.dashboardr-modal-close:focus-visible {
  outline: 2px solid #ffc107;
  outline-offset: 2px;
}

/* Sidebar toggle */
.bslib-sidebar-layout > .collapse-toggle:focus-visible {
  outline: 2px solid #0d6efd;
  outline-offset: 2px;
}

/* Generic links and buttons */
a:focus-visible,
button:focus-visible {
  outline: 2px solid #0d6efd;
  outline-offset: 2px;
  border-radius: 2px;
}

/* =========================================================
 * ARIA live region for filter announcements
 * ========================================================= */
#dashboardr-live-region {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

/* =========================================================
 * Reduced motion
 * Respects user's prefers-reduced-motion setting
 * ========================================================= */
@media (prefers-reduced-motion: reduce) {
  .dashboardr-modal-container {
    animation: none !important;
  }

  .dashboardr-modal-close {
    transition: none !important;
  }

  .dashboardr-skip-link {
    transition: none !important;
  }

  /* Disable Highcharts animations */
  .highcharts-container * {
    transition: none !important;
  }

  /* Disable generic transitions */
  .nav-tabs .nav-link,
  .tab-pane,
  .collapse,
  .collapsing {
    transition: none !important;
  }
}

/* =========================================================
 * Alt text wrapper for visualizations
 * ========================================================= */
.dashboardr-viz-a11y[aria-label] {
  /* No visual change, just ensures the element is recognized */
  position: relative;
}