:root {
  --color-slate-gray: #475569;
  --color-navy-blue: #0f172a;
  --color-crisp-white: #ffffff;
  --color-clinical-teal: #0d9488;
  --color-clinical-teal-hover: #0f766e;
  --color-light-gray: #f1f5f9;
  --font-primary: 'Inter', sans-serif;
}

body {
  font-family: var(--font-primary);
  background-color: var(--color-light-gray);
  color: var(--color-slate-gray);
}

h1, h2, h3, h4, h5, h6 {
  color: var(--color-navy-blue);
  font-weight: 700;
}

/* Micro-animations */
.hover-lift {
  transition: transform 0.2s ease-in-out, box-shadow 0.2s ease-in-out;
}

.hover-lift:hover {
  transform: translateY(-4px);
  box-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
}

.btn-primary {
  background-color: var(--color-clinical-teal);
  color: var(--color-crisp-white);
  transition: background-color 0.2s ease-in-out, transform 0.1s ease-in-out;
}

.btn-primary:hover {
  background-color: var(--color-clinical-teal-hover);
}

.btn-primary:active {
  transform: scale(0.98);
}

.btn-navy {
  background-color: var(--color-navy-blue);
  color: var(--color-crisp-white);
  transition: background-color 0.2s ease-in-out, transform 0.1s ease-in-out;
}

.btn-navy:hover {
  background-color: #1e293b;
}

/* Navigation */
.sticky-nav {
  position: sticky;
  top: 0;
  z-index: 50;
  backdrop-filter: blur(8px);
  background-color: rgba(255, 255, 255, 0.95);
  border-bottom: 1px solid #e2e8f0;
}

/* Modal Overlay */
.modal-overlay {
  background-color: rgba(15, 23, 42, 0.7);
  backdrop-filter: blur(4px);
}

/* Loading Spinner */
.spinner {
  border: 3px solid rgba(255,255,255,0.3);
  border-radius: 50%;
  border-top: 3px solid var(--color-crisp-white);
  width: 24px;
  height: 24px;
  animation: spin 1s linear infinite;
}

@keyframes spin {
  0% { transform: rotate(0deg); }
  100% { transform: rotate(360deg); }
}

/* Custom Scrollbar for a more professional look */
::-webkit-scrollbar {
  width: 8px;
}
::-webkit-scrollbar-track {
  background: var(--color-light-gray); 
}
::-webkit-scrollbar-thumb {
  background: #cbd5e1; 
  border-radius: 4px;
}
::-webkit-scrollbar-thumb:hover {
  background: #94a3b8; 
}

/* =========================================
   Horizontal Categories Carousel
   ========================================= */
.categories-scroll {
  -webkit-overflow-scrolling: touch;
  scrollbar-width: thin;
  scrollbar-color: #0d9488 #f1f5f9;
  cursor: grab;
  padding-left: 4px;
  padding-right: 4px;
}

.categories-scroll:active {
  cursor: grabbing;
}

.categories-scroll::-webkit-scrollbar {
  height: 6px;
}

.categories-scroll::-webkit-scrollbar-track {
  background: #f1f5f9;
  border-radius: 3px;
}

.categories-scroll::-webkit-scrollbar-thumb {
  background: #0d9488;
  border-radius: 3px;
}

/* =========================================
   Logo: Boost contrast on white background
   ========================================= */
.logo-img {
  filter: contrast(1.2) brightness(0.9);
}

/* =========================================
   Mobile Nav Improvements
   ========================================= */
@media (max-width: 768px) {
  .sticky-nav {
    padding-top: 4px;
    padding-bottom: 4px;
  }
  
  /* Mobile dropdown menu styling */
  .mobile-menu-open {
    background-color: #ffffff;
    border-top: 2px solid #0d9488;
    box-shadow: 0 8px 20px rgba(0,0,0,0.08);
  }
  
  .mobile-menu-open a {
    color: #0f172a !important;
    font-weight: 600;
    padding: 10px 0;
    border-bottom: 1px solid #f1f5f9;
  }

  .mobile-menu-open a:hover {
    color: #0d9488 !important;
  }
}