/*
 * AfroBoosts App-Like Stability System
 * Prevents code flashes, provides smooth transitions, and ensures professional loading
 */

:root {
  --app-transition-speed: 0.3s;
  --app-fade-speed: 0.4s;
  --app-slide-speed: 0.35s;
  --app-loader-color: #00FFE0;
  --app-loader-bg: rgba(11, 14, 26, 0.95);
  --app-content-bg: linear-gradient(to bottom, #0B0E1A, #101622);
}

/* ======================
   APP LOADING SYSTEM
   ====================== */

html {
  visibility: hidden;
  opacity: 0;
}

html.app-ready {
  visibility: visible;
  opacity: 1;
  transition: opacity var(--app-fade-speed) ease-out;
}

html.app-loading {
  overflow: hidden;
}

html.app-loading body {
  overflow: hidden;
  position: fixed;
  width: 100%;
  height: 100vh;
}

.app-loader {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  background: var(--app-loader-bg);
  backdrop-filter: blur(10px);
  z-index: 99999;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  transition: opacity var(--app-fade-speed) ease-out, visibility var(--app-fade-speed) ease-out;
}

.app-loader.hidden {
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
}

.app-loader-content {
  text-align: center;
  color: #F1F1F1;
}

.app-loader-spinner {
  width: 50px;
  height: 50px;
  border: 3px solid rgba(0, 255, 224, 0.2);
  border-radius: 50%;
  border-top-color: var(--app-loader-color);
  animation: app-spin 1s ease-in-out infinite;
  margin: 0 auto 20px;
}

.app-loader-text {
  font-family: 'Inter', sans-serif;
  font-size: 16px;
  font-weight: 500;
  color: #B8BCC8;
  opacity: 0.8;
}

@keyframes app-spin {
  to { transform: rotate(360deg); }
}

/* ======================
   PAGE TRANSITION SYSTEM
   ====================== */

.app-page-container {
  min-height: 100vh;
  background: var(--app-content-bg);
  transition: opacity var(--app-transition-speed) ease-out, transform var(--app-transition-speed) ease-out;
}

.app-page-container.page-entering {
  opacity: 0;
  transform: translateY(20px);
}

.app-page-container.page-active {
  opacity: 1;
  transform: translateY(0);
}

.app-page-container.page-leaving {
  opacity: 0;
  transform: translateY(-20px);
}

/* ======================
   LAYOUT STABILITY
   ====================== */

img, video, iframe {
  max-width: 100%;
  height: auto;
}

html {
  scrollbar-gutter: stable;
  scroll-behavior: smooth;
}

.nav-link, .btn, button, .app-control {
  -webkit-user-select: none;
  user-select: none;
}

/* ======================
   RESPONSIVE STABILITY
   ====================== */

body {
  overflow-x: hidden;
  -webkit-overflow-scrolling: touch;
}

@supports (-webkit-touch-callout: none) {
  .app-page-container {
    min-height: 100vh;
    min-height: -webkit-fill-available;
  }
}

/* ======================
   NAVIGATION TRANSITIONS
   ====================== */

.nav-link, .menu-link {
  transition: all var(--app-transition-speed) ease-out;
  position: relative;
  overflow: hidden;
}

.nav-link:hover, .menu-link:hover {
  transform: translateY(-2px);
}

/* ======================
   CONTENT FADE-IN SYSTEM
   ====================== */

.app-fade-section {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.6s ease-out, transform 0.6s ease-out;
}

.app-fade-section.visible {
  opacity: 1;
  transform: translateY(0);
}

.app-fade-section:nth-child(1) { transition-delay: 0.1s; }
.app-fade-section:nth-child(2) { transition-delay: 0.2s; }
.app-fade-section:nth-child(3) { transition-delay: 0.3s; }
.app-fade-section:nth-child(4) { transition-delay: 0.4s; }
.app-fade-section:nth-child(5) { transition-delay: 0.5s; }

/* ======================
   MOBILE OPTIMIZATIONS
   ====================== */

html, body {
  -webkit-overflow-scrolling: touch;
  overscroll-behavior: none;
}

input, select, textarea {
  font-size: 16px;
}

* {
  -webkit-tap-highlight-color: transparent;
}

/* ======================
   PERFORMANCE HINTS
   ====================== */

.app-page-container,
.app-loader,
.nav-link,
.app-fade-section {
  will-change: transform, opacity;
  transform: translateZ(0);
  backface-visibility: hidden;
}

/* ======================
   ACCESSIBILITY
   ====================== */

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

/* ======================
   BROWSER COMPATIBILITY
   ====================== */

@supports (-webkit-appearance: none) {
  .app-page-container {
    -webkit-transform: translateZ(0);
  }
}