static/shared/css/animation-fixes.css

/**
 * Animation Fixes - Eliminate Flickering and Improve Performance
 * Addresses: smooth animations, hardware acceleration, layout stability
 */

/* =============================================================================
   GLOBAL ANIMATION SETTINGS - Prevent Flickering
   ============================================================================= */

* {
  /* Force hardware acceleration for smooth animations */
  -webkit-backface-visibility: hidden;
  backface-visibility: hidden;
  -webkit-perspective: 1000;
  perspective: 1000;
  
  /* Prevent text flickering during animations */
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  
  /* Optimize rendering */
  -webkit-transform: translateZ(0);
  transform: translateZ(0);
}

/* Disable perspective for specific elements that don't need it */
input, textarea, select, button {
  -webkit-perspective: none;
  perspective: none;
}

/* =============================================================================
   SMOOTH TRANSITIONS - Consistent Timing
   ============================================================================= */

/* Standard transition for interactive elements */
.btn, button, a, .card, .service-card, .metric-card,
.nav-item, .sidebar-item, [class*="btn-"] {
  transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
  will-change: transform, opacity, background-color, border-color;
}

/* Faster transitions for hover effects */
.btn:hover, button:hover, a:hover,
.card:hover, .service-card:hover {
  transition: all 0.15s cubic-bezier(0.4, 0, 0.2, 1);
}

/* =============================================================================
   LOADING ANIMATIONS - Smooth and No Flicker
   ============================================================================= */

.loading-spinner, .spinner, [class*="loading"] {
  animation: spin 1s linear infinite;
  will-change: transform;
}

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

/* Pulse animation for status indicators */
.status-dot, .pulse, [class*="pulse"] {
  animation: pulse-smooth 2s cubic-bezier(0.4, 0, 0.6, 1) infinite;
  will-change: opacity;
}

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

/* Fade in animation */
.fade-in, [class*="fade-in"] {
  animation: fadeIn 0.3s cubic-bezier(0.4, 0, 0.2, 1) forwards;
  will-change: opacity;
}

@keyframes fadeIn {
  from {
    opacity: 0;
  }
  to {
    opacity: 1;
  }
}

/* Slide up animation */
.slide-up, [class*="slide-up"] {
  animation: slideUp 0.4s cubic-bezier(0.4, 0, 0.2, 1) forwards;
  will-change: transform, opacity;
}

@keyframes slideUp {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* =============================================================================
   LAYOUT STABILITY - Prevent Layout Shifts
   ============================================================================= */

/* Reserve space for images to prevent layout shift */
img {
  max-width: 100%;
  height: auto;
  display: block;
}

/* Prevent content jump during loading */
.loading-state, .error-state, .empty-state {
  min-height: 200px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-direction: column;
}

/* =============================================================================
   SCROLLING PERFORMANCE
   ============================================================================= */

/* Smooth scrolling with performance optimization */
html {
  scroll-behavior: smooth;
}

/* Reduce paint overhead on scroll */
.page-content, .main-content, [class*="container"] {
  contain: layout style paint;
}

/* =============================================================================
   MODAL & OVERLAY ANIMATIONS - No Flash
   ============================================================================= */

.modal, .overlay, [class*="modal"], [class*="overlay"] {
  animation: fadeIn 0.2s cubic-bezier(0.4, 0, 0.2, 1) forwards;
  will-change: opacity;
}

.modal-content, [class*="modal-content"] {
  animation: modalSlideUp 0.3s cubic-bezier(0.4, 0, 0.2, 1) forwards;
  will-change: transform, opacity;
}

@keyframes modalSlideUp {
  from {
    opacity: 0;
    transform: translateY(30px) scale(0.95);
  }
  to {
    opacity: 1;
    transform: translateY(0) scale(1);
  }
}

/* =============================================================================
   TOAST NOTIFICATIONS - Smooth Entry/Exit
   ============================================================================= */

.toast, [class*="toast"] {
  animation: toastSlideIn 0.3s cubic-bezier(0.4, 0, 0.2, 1) forwards;
  will-change: transform, opacity;
}

@keyframes toastSlideIn {
  from {
    opacity: 0;
    transform: translateX(100%);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

.toast.removing, [class*="toast"].removing {
  animation: toastSlideOut 0.2s cubic-bezier(0.4, 0, 0.2, 1) forwards;
}

@keyframes toastSlideOut {
  from {
    opacity: 1;
    transform: translateX(0);
  }
  to {
    opacity: 0;
    transform: translateX(100%);
  }
}

/* =============================================================================
   CHART ANIMATIONS - Prevent Flicker During Updates
   ============================================================================= */

#tradingview-chart, [id*="chart"], .chart-container {
  /* Optimize chart rendering */
  will-change: auto;
  contain: layout size paint;
}

/* =============================================================================
   HOVER EFFECTS - Smooth and Responsive
   ============================================================================= */

/* Card hover effects */
.card:hover, .service-card:hover, .metric-card:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.15);
}

/* Button hover effects */
.btn:hover, button:hover {
  transform: translateY(-1px);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
}

/* Remove transform for disabled buttons */
.btn:disabled, button:disabled,
.btn[disabled], button[disabled] {
  transform: none !important;
  opacity: 0.5;
  cursor: not-allowed;
}

/* =============================================================================
   REDUCED MOTION - Accessibility
   ============================================================================= */

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}

/* =============================================================================
   FIX SPECIFIC COMPONENTS
   ============================================================================= */

/* Service Health Monitor - No flicker */
.health-stat-card, .service-card {
  transform: translateZ(0);
  backface-visibility: hidden;
}

/* Dashboard cards - Stable layout */
.stat-card, .market-card, .news-card {
  transform: translateZ(0);
  backface-visibility: hidden;
}

/* Sidebar - Smooth transitions */
.sidebar, #sidebar-container {
  transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  will-change: transform;
}

/* Header - Stable positioning */
.header, #header-container {
  transform: translateZ(0);
  backface-visibility: hidden;
}

/* Tables - Prevent flicker on update */
table, .table, [class*="table"] {
  transform: translateZ(0);
  backface-visibility: hidden;
}

/* Status badges - Smooth color transitions */
.badge, .status-badge, [class*="badge"] {
  transition: background-color 0.2s ease, color 0.2s ease;
}

/* =============================================================================
   PERFORMANCE OPTIMIZATIONS
   ============================================================================= */

/* Contain repaints to specific elements */
.card, .modal, .sidebar, .header,
.chart-container, .table-container {
  contain: layout style paint;
}

/* Optimize transform and opacity changes */
[class*="animate-"], [class*="transition-"] {
  will-change: transform, opacity;
}

/* Clean up will-change after animation completes */
.card:not(:hover), .btn:not(:hover),
.service-card:not(:hover) {
  will-change: auto;
}