/* ═════════════════════════════════════════════════════════════
   NTMK UI/UX PRO MAX — ICONOGRAPHY & ACCESSIBILITY STYLES
   Complies with UI/UX Pro Max guidelines:
   - Consistent Lucide SVG rendering (stroke=currentColor)
   - Micro-interaction transitions (150-250ms)
   - Skip to main content keyboard accessibility
   - Minimum 44x44px touch target enforcement
   ═════════════════════════════════════════════════════════════ */

.ui-icon {
  display: inline-block;
  vertical-align: -0.15em;
  stroke: currentColor;
  fill: none;
  stroke-width: 2;
  stroke-linecap: round;
  stroke-linejoin: round;
  flex-shrink: 0;
  transition: transform 0.2s cubic-bezier(0.16, 1, 0.3, 1), stroke 0.2s ease, color 0.2s ease;
}

.ui-icon-xs { width: 14px; height: 14px; }
.ui-icon-sm { width: 16px; height: 16px; }
.ui-icon-md { width: 20px; height: 20px; }
.ui-icon-lg { width: 24px; height: 24px; }
.ui-icon-xl { width: 28px; height: 28px; }

/* In navigation items */
.nav-item-btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  cursor: pointer;
  transition: all 0.2s cubic-bezier(0.16, 1, 0.3, 1);
}

.nav-item-btn:hover .ui-icon {
  transform: translateY(-1px);
}

.mob-nav-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  min-width: 48px;
  gap: 3px;
  cursor: pointer;
  touch-action: manipulation;
  transition: color 0.2s ease, transform 0.2s ease;
}

.mob-nav-item:active {
  transform: scale(0.96);
}

.mob-nav-item .ui-icon {
  width: 20px;
  height: 20px;
}

/* Skip link for keyboard navigation (WCAG AAA) */
.skip-link {
  position: absolute;
  top: -120px;
  left: 20px;
  background: var(--brand-primary, #3b82f6);
  color: #ffffff !important;
  padding: 10px 18px;
  border-radius: var(--radius-md, 12px);
  font-weight: 700;
  font-size: 0.95rem;
  z-index: 99999;
  text-decoration: none;
  box-shadow: 0 10px 25px -5px rgba(0, 0, 0, 0.3);
  transition: top 0.2s ease;
}

.skip-link:focus,
.skip-link:focus-visible {
  top: 16px;
  outline: 3px solid #ffffff;
  outline-offset: 3px;
}

/* Flag button animation in exam room */
.btn-flag-toggle {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  cursor: pointer;
  transition: all 0.2s cubic-bezier(0.16, 1, 0.3, 1);
}

.btn-flag-toggle:hover .ui-icon {
  transform: rotate(-10deg) scale(1.1);
}

.btn-flag-toggle.active .ui-icon {
  color: #ef4444;
  fill: #ef4444;
}

/* High contrast touch feedback for mobile */
@media (max-width: 768px) {
  .exam-tool-btn {
    min-height: 40px;
    min-width: 40px;
    padding: 6px 10px;
  }
}