/**
 * RunDrop - High-Performance 120FPS Scrolling, Instant Page Flip & Zero-Shift Suite
 * Synchronized with Database & Site Settings.
 */

:root {
  --rd-accent-glow: linear-gradient(90deg, #6366f1, #8b5cf6, #ec4899, #06b6d4);
  --rd-announcement-height: 38px;
}

/* 1. Prevent Browser Flash & Background Flickering */
html {
  background-color: #0b0f19 !important;
  color-scheme: dark;
  scroll-behavior: auto !important; /* Instant direct input response (no wheel lag) */
  overscroll-behavior-y: none; /* Disables rubber-band lag */
  -webkit-overflow-scrolling: touch; /* Momentum 120fps scrolling on mobile & touchpads */
}

/* 2. High-Performance 120FPS GPU Background Layer (Eliminates Scroll Lag & Screen Breaking) */
body {
  opacity: 1 !important;
  background-color: #0b0f19 !important;
  background-attachment: scroll !important;
  animation: rdInstantFlip 120ms cubic-bezier(0.16, 1, 0.3, 1) both;
  position: relative;
}

body::before {
  content: '';
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  z-index: -99999;
  background: var(--bg-gradient, linear-gradient(135deg, #0b0f19 0%, #0f172a 50%, #0b0f19 100%));
  pointer-events: none;
  transform: translate3d(0, 0, 0);
  -webkit-transform: translate3d(0, 0, 0);
  backface-visibility: hidden;
  will-change: transform;
}

@keyframes rdInstantFlip {
  0% {
    opacity: 0.96;
  }
  100% {
    opacity: 1;
  }
}

/* 3. Announcement Bar Room Reservation (Zero Screen Shaking on Refresh) */
html.has-announcement-bar #announcementBanner {
  display: flex !important;
  min-height: var(--rd-announcement-height) !important;
  height: var(--rd-announcement-height) !important;
  box-sizing: border-box;
  opacity: 1;
  visibility: visible;
  contain: layout size;
}

#announcementBanner {
  transition: height 0.22s cubic-bezier(0.16, 1, 0.3, 1), opacity 0.18s ease, min-height 0.22s ease;
}

#announcementBanner.dismissing {
  height: 0 !important;
  min-height: 0 !important;
  padding-top: 0 !important;
  padding-bottom: 0 !important;
  opacity: 0 !important;
  overflow: hidden !important;
}

/* 4. Zero Screen Shake & Layout Shifts (Lock Dimensions on Dynamic Shell Elements) */
.nav {
  height: 68px !important;
  contain: layout style;
  transform: translate3d(0, 0, 0);
  backface-visibility: hidden;
}

.brand-icon {
  width: 34px !important;
  height: 34px !important;
  min-width: 34px !important;
  min-height: 34px !important;
  contain: strict;
  flex-shrink: 0;
}

.user-greeting-wrapper {
  min-height: 48px;
  contain: layout;
}

.user-greeting-card {
  animation: none !important; /* Stop jarring post-load fade animation that shifts layout */
}

/* 5. Fluid Native Inner Container Scrolling (Replaces Heavy JS Wheel Interceptors) */
#recentList, #receiveWifiFeedList, .wifi-feed-list, .dashboard-history-scroll,
.table-wrap, .comparison-table-wrap, .batch-files-list, .file-preview-list,
.share-detail-content-box, .editor-output-body {
  overscroll-behavior: auto;
  -webkit-overflow-scrolling: touch;
}

/* 6. Ultra-Fast Top Glowing Progress Indicator (YouTube / GitHub / Vercel style) */
#rdTransitionProgress {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 2.5px;
  z-index: 9999999;
  pointer-events: none;
  background: var(--rd-accent-glow);
  box-shadow: 0 0 10px rgba(99, 102, 241, 0.8), 0 0 20px rgba(236, 72, 153, 0.5);
  transform: translate3d(-100%, 0, 0);
  transition: transform 160ms cubic-bezier(0.2, 0.8, 0.2, 1), opacity 100ms ease;
  will-change: transform, opacity;
  opacity: 0;
}

#rdTransitionProgress.animating {
  opacity: 1;
  transform: translate3d(-15%, 0, 0);
}

#rdTransitionProgress.finishing {
  opacity: 1;
  transform: translate3d(0, 0, 0);
  transition: transform 90ms ease-out, opacity 100ms ease 80ms;
}

#rdTransitionProgress.done {
  opacity: 0;
}

/* 7. Transition Effect Modes (Synced with Admin Settings) */
html[data-transition-effect="glow_bar"] body {
  animation: none !important;
}

html[data-transition-effect="fade_float"] body {
  animation: rdInstantFlip 120ms cubic-bezier(0.16, 1, 0.3, 1) both;
}

html[data-transition-effect="curtain_shutter"] body {
  animation: rdInstantFlip 140ms ease-out both;
}

html[data-transition-effect="off"] #rdTransitionProgress {
  display: none !important;
}

html[data-transition-effect="off"] body {
  animation: none !important;
}

/* Accessibility: Respect Reduced Motion Preferences */
@media (prefers-reduced-motion: reduce) {
  #rdTransitionProgress, body {
    transition: none !important;
    animation: none !important;
    transform: none !important;
    opacity: 1 !important;
  }
}