index.css

@tailwind base;
@tailwind components;
@tailwind utilities;

/* Base styles */
body {
  font-family: 'Inter', system-ui, -apple-system, sans-serif;
  -webkit-tap-highlight-color: transparent;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* Touch optimization */
input, button, select, textarea {
  touch-action: manipulation;
}

/* Custom scrollbar */
::-webkit-scrollbar {
  width: 8px;
  height: 8px;
}

::-webkit-scrollbar-track {
  background: #f1f5f9;
  border-radius: 4px;
}

::-webkit-scrollbar-thumb {
  background: #cbd5e1;
  border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
  background: #94a3b8;
}

/* Animations */
@keyframes fade-in {
  from { opacity: 0; }
  to { opacity: 1; }
}

@keyframes slide-in-from-bottom {
  from { 
    opacity: 0;
    transform: translateY(20px);
  }
  to { 
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes slide-in-from-top-4 {
  from {
    opacity: 0;
    transform: translateY(-16px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes zoom-in-95 {
  from {
    opacity: 0;
    transform: scale(0.95);
  }
  to {
    opacity: 1;
    transform: scale(1);
  }
}

/* Utility classes for animations */
.animate-in {
  animation-duration: 300ms;
  animation-timing-function: cubic-bezier(0.16, 1, 0.3, 1);
  animation-fill-mode: both;
}

.fade-in {
  animation-name: fade-in;
}

.slide-in-from-bottom {
  animation-name: slide-in-from-bottom;
}

.slide-in-from-top-4 {
  animation-name: slide-in-from-top-4;
}

.zoom-in-95 {
  animation-name: zoom-in-95;
}

.duration-200 {
  animation-duration: 200ms;
}

.duration-300 {
  animation-duration: 300ms;
}

/* Number input - hide spinners */
input[type="number"]::-webkit-inner-spin-button,
input[type="number"]::-webkit-outer-spin-button {
  -webkit-appearance: none;
  margin: 0;
}

input[type="number"] {
  -moz-appearance: textfield;
}

/* Select dropdown arrow fix */
select {
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' fill='none' viewBox='0 0 24 24' stroke='%2394a3b8'%3E%3Cpath stroke-linecap='round' stroke-linejoin='round' stroke-width='2' d='M19 9l-7 7-7-7'%3E%3C/path%3E%3C/svg%3E");
  background-position: right 1rem center;
  background-repeat: no-repeat;
  background-size: 1.5rem;
  padding-right: 3rem;
}

/* Focus ring styles */
.focus-ring {
  @apply focus:outline-none focus:ring-2 focus:ring-indigo-500 focus:ring-offset-2;
}

/* Loading skeleton */
@keyframes shimmer {
  0% {
    background-position: -200% 0;
  }
  100% {
    background-position: 200% 0;
  }
}

.skeleton {
  background: linear-gradient(
    90deg,
    #f1f5f9 25%,
    #e2e8f0 50%,
    #f1f5f9 75%
  );
  background-size: 200% 100%;
  animation: shimmer 1.5s infinite;
}

/* Hide scrollbar for Chrome, Safari and Opera */
.no-scrollbar::-webkit-scrollbar {
  display: none;
}

/* Hide scrollbar for IE, Edge and Firefox */
.no-scrollbar {
  -ms-overflow-style: none;  /* IE and Edge */
  scrollbar-width: none;  /* Firefox */
}

/* Performance optimizations for smooth scrolling */
.smooth-scroll {
  -webkit-overflow-scrolling: touch;
  scroll-behavior: smooth;
}

/* Hardware acceleration for scrollable containers */
[class*="overflow-y-auto"],
[class*="overflow-x-auto"],
[class*="overflow-auto"] {
  -webkit-overflow-scrolling: touch;
  transform: translateZ(0);
  backface-visibility: hidden;
  will-change: scroll-position;
}

/* Optimize list rendering */
.virtual-list-item {
  contain: layout style paint;
}

/* Reduce paint on animated elements */
.transition-all {
  will-change: transform, opacity;
}

/* Optimize fixed/sticky positioning */
nav, [class*="fixed"], [class*="sticky"] {
  transform: translateZ(0);
  backface-visibility: hidden;
}

/* Optimize cards and repeated elements */
[class*="rounded-xl"],
[class*="rounded-2xl"],
[class*="rounded-3xl"] {
  contain: layout style;
}

/* Reduce layout thrashing on interactive elements */
button, input, select {
  contain: layout;
}

/* Performance optimizations for mobile */
@media (max-width: 768px) {
  * {
    -webkit-tap-highlight-color: transparent;
  }
  
  /* Optimize touch scrolling on mobile */
  body {
    overscroll-behavior-y: none;
  }
  
  /* Prevent text selection lag on touch */
  .disable-select {
    -webkit-user-select: none;
    user-select: none;
  }
}