/* ==========================================================================
   ICONS - MedCourses Icon System
   Style: Clean line icons following medical/institutional design
   ========================================================================== */

/* --------------------------------------------------------------------------
   Base Icon Component
   -------------------------------------------------------------------------- */

.icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 1.5rem;
  height: 1.5rem;
  flex-shrink: 0;
  color: currentColor;
}

.icon svg {
  width: 100%;
  height: 100%;
}

/* --------------------------------------------------------------------------
   Icon Sizes
   -------------------------------------------------------------------------- */

.icon--xs {
  width: 1rem;
  height: 1rem;
}

.icon--sm {
  width: 1.25rem;
  height: 1.25rem;
}

.icon--md {
  width: 1.5rem;
  height: 1.5rem;
}

.icon--lg {
  width: 2rem;
  height: 2rem;
}

.icon--xl {
  width: 2.5rem;
  height: 2.5rem;
}

.icon--2xl {
  width: 3rem;
  height: 3rem;
}

.icon--3xl {
  width: 4rem;
  height: 4rem;
}

.icon--4xl {
  width: 5rem;
  height: 5rem;
}

/* --------------------------------------------------------------------------
   Icon Colors
   -------------------------------------------------------------------------- */

.icon--primary {
  color: var(--color-primary-500);
}

.icon--secondary {
  color: var(--color-secondary-500);
}

.icon--accent {
  color: var(--color-accent-500);
}

.icon--white {
  color: var(--color-white);
}

.icon--muted {
  color: var(--color-neutral-400);
}

.icon--dark {
  color: var(--color-neutral-800);
}

.icon--success {
  color: var(--color-success);
}

.icon--warning {
  color: var(--color-warning);
}

.icon--error {
  color: var(--color-error);
}

/* --------------------------------------------------------------------------
   Icon with Background Circle
   -------------------------------------------------------------------------- */

.icon-circle {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-full);
  background-color: var(--color-primary-50);
  color: var(--color-primary-500);
  transition: all var(--transition-normal);
}

.icon-circle--sm {
  width: 2.5rem;
  height: 2.5rem;
  padding: 0.5rem;
}

.icon-circle--md {
  width: 3.5rem;
  height: 3.5rem;
  padding: 0.75rem;
}

.icon-circle--lg {
  width: 4.5rem;
  height: 4.5rem;
  padding: 1rem;
}

.icon-circle--xl {
  width: 5.5rem;
  height: 5.5rem;
  padding: 1.25rem;
}

.icon-circle svg {
  width: 100%;
  height: 100%;
}

/* Icon Circle Color Variants */
.icon-circle--primary {
  background-color: var(--color-primary-50);
  color: var(--color-primary-500);
}

.icon-circle--secondary {
  background-color: var(--color-secondary-50);
  color: var(--color-secondary-500);
}

.icon-circle--accent {
  background-color: var(--color-accent-50);
  color: var(--color-accent-500);
}

.icon-circle--white {
  background-color: rgba(255, 255, 255, 0.15);
  color: var(--color-white);
}

.icon-circle--outline {
  background-color: transparent;
  border: 2px solid var(--color-primary-200);
  color: var(--color-primary-500);
}

/* Hover states for interactive icon circles */
.icon-circle--hover:hover {
  background-color: var(--color-primary-100);
  transform: scale(1.05);
}

.icon-circle--hover.icon-circle--secondary:hover {
  background-color: var(--color-secondary-100);
}

/* --------------------------------------------------------------------------
   Icon with Square Background
   -------------------------------------------------------------------------- */

.icon-square {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-lg);
  background-color: var(--color-primary-50);
  color: var(--color-primary-500);
  transition: all var(--transition-normal);
}

.icon-square--sm {
  width: 2.5rem;
  height: 2.5rem;
  padding: 0.5rem;
}

.icon-square--md {
  width: 3.5rem;
  height: 3.5rem;
  padding: 0.75rem;
}

.icon-square--lg {
  width: 4.5rem;
  height: 4.5rem;
  padding: 1rem;
}

.icon-square svg {
  width: 100%;
  height: 100%;
}

/* Icon Square Color Variants */
.icon-square--primary {
  background-color: var(--color-primary-50);
  color: var(--color-primary-500);
}

.icon-square--secondary {
  background-color: var(--color-secondary-50);
  color: var(--color-secondary-500);
}

.icon-square--gradient {
  background: var(--gradient-primary);
  color: var(--color-white);
}

/* --------------------------------------------------------------------------
   Category Icon Cards
   -------------------------------------------------------------------------- */

.category-icon {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--spacing-4);
  padding: var(--spacing-6);
  background: var(--color-white);
  border-radius: var(--radius-xl);
  border: 1px solid var(--color-neutral-100);
  transition: all var(--transition-normal);
  cursor: pointer;
  text-decoration: none;
  color: var(--color-neutral-700);
}

.category-icon:hover {
  border-color: var(--color-primary-200);
  box-shadow: var(--shadow-lg);
  transform: translateY(-4px);
}

.category-icon:hover .category-icon__symbol {
  background-color: var(--color-primary-100);
  transform: scale(1.1);
}

.category-icon__symbol {
  width: 4rem;
  height: 4rem;
  padding: 1rem;
  background-color: var(--color-primary-50);
  border-radius: var(--radius-xl);
  color: var(--color-primary-500);
  transition: all var(--transition-normal);
}

.category-icon__symbol svg {
  width: 100%;
  height: 100%;
}

.category-icon__label {
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-semibold);
  text-align: center;
}

.category-icon__count {
  font-size: var(--font-size-xs);
  color: var(--color-neutral-500);
}

/* Category with different accent colors */
.category-icon--cardio .category-icon__symbol {
  background-color: #fef2f2;
  color: #ef4444;
}

.category-icon--neuro .category-icon__symbol {
  background-color: #fef3c7;
  color: #f59e0b;
}

.category-icon--pediatrics .category-icon__symbol {
  background-color: #ecfdf5;
  color: #10b981;
}

.category-icon--derma .category-icon__symbol {
  background-color: #fdf4ff;
  color: #d946ef;
}

.category-icon--ortho .category-icon__symbol {
  background-color: #eff6ff;
  color: #3b82f6;
}

.category-icon--emergency .category-icon__symbol {
  background-color: #fef2f2;
  color: #dc2626;
}

/* --------------------------------------------------------------------------
   Feature Icon (for "How it Works" sections)
   -------------------------------------------------------------------------- */

.feature-icon {
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  padding: var(--spacing-6);
}

.feature-icon__number {
  position: absolute;
  top: 0;
  right: 50%;
  transform: translateX(3rem);
  width: 2rem;
  height: 2rem;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--gradient-secondary);
  color: var(--color-white);
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-bold);
  border-radius: var(--radius-full);
}

.feature-icon__symbol {
  width: 5rem;
  height: 5rem;
  padding: 1.25rem;
  background-color: var(--color-primary-50);
  border-radius: var(--radius-full);
  color: var(--color-primary-500);
  margin-bottom: var(--spacing-4);
}

.feature-icon__symbol svg {
  width: 100%;
  height: 100%;
}

.feature-icon__title {
  font-size: var(--font-size-lg);
  font-weight: var(--font-weight-semibold);
  color: var(--color-neutral-900);
  margin-bottom: var(--spacing-2);
}

.feature-icon__desc {
  font-size: var(--font-size-sm);
  color: var(--color-neutral-600);
  max-width: 280px;
}

/* --------------------------------------------------------------------------
   Social Media Icons
   -------------------------------------------------------------------------- */

.social-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 2.5rem;
  height: 2.5rem;
  border-radius: var(--radius-full);
  background-color: rgba(255, 255, 255, 0.1);
  color: var(--color-white);
  transition: all var(--transition-fast);
}

.social-icon:hover {
  background-color: var(--color-primary-500);
  transform: translateY(-2px);
}

.social-icon svg {
  width: 1.25rem;
  height: 1.25rem;
}

/* Light version for light backgrounds */
.social-icon--light {
  background-color: var(--color-neutral-100);
  color: var(--color-neutral-600);
}

.social-icon--light:hover {
  background-color: var(--color-primary-500);
  color: var(--color-white);
}

/* --------------------------------------------------------------------------
   Inline Icons (within text or buttons)
   -------------------------------------------------------------------------- */

.btn .icon,
.link .icon {
  margin-right: var(--spacing-2);
}

.btn .icon--right,
.link .icon--right {
  margin-right: 0;
  margin-left: var(--spacing-2);
}

/* --------------------------------------------------------------------------
   List with Icons
   -------------------------------------------------------------------------- */

.icon-list {
  list-style: none;
  padding: 0;
  margin: 0;
}

.icon-list__item {
  display: flex;
  align-items: flex-start;
  gap: var(--spacing-3);
  padding: var(--spacing-2) 0;
}

.icon-list__item .icon {
  flex-shrink: 0;
  color: var(--color-primary-500);
  margin-top: 0.125rem;
}

.icon-list__item--check .icon {
  color: var(--color-success);
}

/* --------------------------------------------------------------------------
   Navigation Icons
   -------------------------------------------------------------------------- */

.nav-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 2.5rem;
  height: 2.5rem;
  border-radius: var(--radius-md);
  color: var(--color-neutral-600);
  transition: all var(--transition-fast);
}

.nav-icon:hover {
  background-color: var(--color-neutral-100);
  color: var(--color-primary-500);
}

.nav-icon svg {
  width: 1.5rem;
  height: 1.5rem;
}

/* --------------------------------------------------------------------------
   Icon Animations
   -------------------------------------------------------------------------- */

.icon--spin {
  animation: icon-spin 1s linear infinite;
}

.icon--pulse {
  animation: icon-pulse 1.5s ease-in-out infinite;
}

.icon--bounce {
  animation: icon-bounce 1s ease infinite;
}

@keyframes icon-spin {
  from { transform: rotate(0deg); }
  to { transform: rotate(360deg); }
}

@keyframes icon-pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.5; }
}

@keyframes icon-bounce {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-4px); }
}

/* --------------------------------------------------------------------------
   Icon Grid (for icon showcase/demo)
   -------------------------------------------------------------------------- */

.icon-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(120px, 1fr));
  gap: var(--spacing-4);
  padding: var(--spacing-6);
  background-color: var(--color-neutral-50);
  border-radius: var(--radius-xl);
}

.icon-grid__item {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--spacing-2);
  padding: var(--spacing-4);
  background: var(--color-white);
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-neutral-100);
  transition: all var(--transition-fast);
}

.icon-grid__item:hover {
  border-color: var(--color-primary-200);
  box-shadow: var(--shadow-md);
}

.icon-grid__item svg {
  width: 2rem;
  height: 2rem;
  color: var(--color-primary-500);
}

.icon-grid__name {
  font-size: var(--font-size-xs);
  color: var(--color-neutral-600);
  text-align: center;
}

/* --------------------------------------------------------------------------
   Responsive Adjustments
   -------------------------------------------------------------------------- */

@media (max-width: 768px) {
  .category-icon {
    padding: var(--spacing-4);
  }
  
  .category-icon__symbol {
    width: 3rem;
    height: 3rem;
    padding: 0.75rem;
  }
  
  .feature-icon__symbol {
    width: 4rem;
    height: 4rem;
    padding: 1rem;
  }
  
  .icon-circle--xl {
    width: 4.5rem;
    height: 4.5rem;
    padding: 1rem;
  }
}