/* ============================================
   TOOLTIP STYLES
   Contextual help for metrics and features
   ============================================ */

.tooltip-popup {
  position: absolute;
  z-index: var(--z-modal);
  max-width: 300px;
  padding: 12px 16px;
  background: var(--color-text-900);
  color: var(--color-neutral-white);
  font-size: 13px;
  line-height: 1.5;
  border-radius: var(--radius-sm);
  box-shadow: var(--shadow-md);
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.2s ease, visibility 0.2s ease;
  pointer-events: none;
}

.tooltip-popup.visible {
  opacity: 1;
  visibility: visible;
}

.tooltip-popup::before {
  content: '';
  position: absolute;
  bottom: 100%;
  left: 50%;
  transform: translateX(-50%);
  border: 6px solid transparent;
  border-bottom-color: var(--color-text-900);
}

.tooltip-popup.below::before {
  bottom: auto;
  top: 100%;
  border-bottom-color: transparent;
  border-top-color: var(--color-text-900);
}

/* Tooltip Trigger Styling */
[data-tooltip] {
  position: relative;
  cursor: help;
  text-decoration: underline;
  text-decoration-style: dotted;
  text-decoration-color: var(--color-text-600);
  text-underline-offset: 2px;
}

[data-tooltip]:hover,
[data-tooltip]:focus {
  text-decoration-color: var(--color-text-900);
}

/* Icon-based tooltips (e.g., info icon) */
.tooltip-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 18px;
  height: 18px;
  border-radius: var(--radius-full);
  background: var(--color-grey-700);
  color: var(--color-text-700);
  font-size: 12px;
  font-weight: 700;
  cursor: help;
  margin-left: 4px;
  vertical-align: middle;
  transition: all 0.2s;
}

.tooltip-icon:hover,
.tooltip-icon:focus {
  background: var(--color-information-500);
  color: var(--color-neutral-white);
  transform: scale(1.1);
}

/* Mobile Adjustments */
@media (max-width: 768px) {
  .tooltip-popup {
    max-width: calc(100vw - 32px);
    font-size: 12px;
  }
}

/* Touch Device Support */
@media (hover: none) and (pointer: coarse) {
  [data-tooltip] {
    text-decoration-style: solid;
  }
  
  /* Show tooltip on tap/focus */
  [data-tooltip]:active + .tooltip-popup,
  [data-tooltip]:focus + .tooltip-popup {
    opacity: 1;
    visibility: visible;
  }
}

/* Accessibility: Reduce Motion */
@media (prefers-reduced-motion: reduce) {
  .tooltip-popup {
    transition: none;
  }
  
  .tooltip-icon {
    transition: none;
  }
}

/* High Contrast Mode */
@media (prefers-contrast: high) {
  .tooltip-popup {
    border: 2px solid var(--color-text-900);
  }
}

/* Dark Mode — keep tooltips dark (--color-text-900 inverts to near-white in dark mode) */
body.dark-mode .tooltip-popup {
  background: var(--color-neutral-200);
  color: var(--color-text-900);
  box-shadow: var(--shadow-lg);
}

body.dark-mode .tooltip-popup::before {
  border-bottom-color: var(--color-neutral-200);
}

body.dark-mode .tooltip-popup.below::before {
  border-top-color: var(--color-neutral-200);
  border-bottom-color: transparent;
}

body.dark-mode .tooltip-icon {
  background: var(--color-neutral-300);
  color: var(--color-text-700);
}