/* ==============================================================================
   LUPIA AI — MASTER MOTION & SCREEN TRANSITION SYSTEM
   Cinematic Apple-grade curves, Staggered Reveals, Spring Dynamics & Tactile Feedback
   ============================================================================== */

/* 1. Seamless Page Cross-Fade */
body {
  opacity: 0;
  transition: opacity 0.28s cubic-bezier(0.16, 1, 0.3, 1);
}

body.lupia-page-ready {
  opacity: 1;
}

body.lupia-page-exit {
  opacity: 0 !important;
  transition: opacity 0.16s cubic-bezier(0.16, 1, 0.3, 1) !important;
}

/* 2. Top Neon Radar Reading Stream (100% GPU Accelerated via scaleX, 0 Layout Reflows) */
#lupiaReadingProgress {
  position: fixed;
  top: 0;
  left: 0;
  height: 2.5px;
  width: 100%;
  transform-origin: left;
  transform: scaleX(0);
  background: linear-gradient(90deg, #00D4E5 0%, #38BDF8 50%, #F59E0B 100%);
  z-index: 99999;
  pointer-events: none;
  box-shadow: 0 0 10px rgba(0, 212, 229, 0.7), 0 0 3px rgba(245, 158, 11, 0.5);
  will-change: transform;
}

/* 3. Cinematic Heading & Section Reveal (Smooth Spring without Software Blur Jitter) */
.lupia-reveal-heading {
  opacity: 0;
  transform: translate3d(0, 22px, 0);
  transition: opacity 0.65s cubic-bezier(0.16, 1, 0.3, 1),
              transform 0.65s cubic-bezier(0.16, 1, 0.3, 1);
}

.lupia-reveal-heading.is-revealed {
  opacity: 1;
  transform: translate3d(0, 0, 0);
}

/* 4. Staggered Bento Cards Reveal (Cinematic Spring Lift) */
.lupia-stagger-card {
  opacity: 0;
  transform: translate3d(0, 24px, 0) scale(0.98);
  transition: opacity 0.55s cubic-bezier(0.16, 1, 0.3, 1),
              transform 0.55s cubic-bezier(0.16, 1, 0.3, 1),
              box-shadow 0.25s ease,
              border-color 0.25s ease;
}

.lupia-stagger-container.is-revealed .lupia-stagger-card {
  opacity: 1;
  transform: translate3d(0, 0, 0) scale(1);
}

/* 5. Mascot Float Physics (OlgaMajong Standard) */
@keyframes floatSlow {
  0%, 100% { transform: translateY(0px) rotate(0deg); }
  50% { transform: translateY(-7px) rotate(0.6deg); }
}
.animate-float {
  animation: floatSlow 4.5s ease-in-out infinite;
}

.lupia-stagger-container.is-revealed .lupia-stagger-card:nth-child(1) { transition-delay: 0.04s; }
.lupia-stagger-container.is-revealed .lupia-stagger-card:nth-child(2) { transition-delay: 0.10s; }
.lupia-stagger-container.is-revealed .lupia-stagger-card:nth-child(3) { transition-delay: 0.16s; }
.lupia-stagger-container.is-revealed .lupia-stagger-card:nth-child(4) { transition-delay: 0.28s; }
.lupia-stagger-container.is-revealed .lupia-stagger-card:nth-child(5) { transition-delay: 0.36s; }
.lupia-stagger-container.is-revealed .lupia-stagger-card:nth-child(6) { transition-delay: 0.44s; }
.lupia-stagger-container.is-revealed .lupia-stagger-card:nth-child(7) { transition-delay: 0.52s; }
.lupia-stagger-container.is-revealed .lupia-stagger-card:nth-child(8) { transition-delay: 0.60s; }

/* 5. Apple Spring Tactile Tap & Hover Dynamics */
button, a.rounded-2xl, a.rounded-xl, .lupia-btn, .lupia-interactive {
  -webkit-tap-highlight-color: transparent;
  transition: transform 0.18s cubic-bezier(0.16, 1, 0.3, 1),
              box-shadow 0.22s ease,
              border-color 0.22s ease,
              background-color 0.22s ease;
}

button:active, a.rounded-2xl:active, a.rounded-xl:active, .lupia-btn:active {
  transform: scale(0.972) !important;
}

/* 6. Fluid Spring FAQ Accordion */
details.lupia-accordion {
  transition: background-color 0.25s ease, border-color 0.25s ease, box-shadow 0.25s ease, transform 0.2s ease;
}

details.lupia-accordion summary {
  cursor: pointer;
  user-select: none;
  list-style: none;
  outline: none;
}

details.lupia-accordion summary::-webkit-details-marker {
  display: none;
}

details.lupia-accordion .faq-content {
  display: grid;
  grid-template-rows: 0fr;
  transition: grid-template-rows 0.35s cubic-bezier(0.16, 1, 0.3, 1), opacity 0.3s ease;
  opacity: 0;
}

details.lupia-accordion[open] .faq-content {
  grid-template-rows: 1fr;
  opacity: 1;
}

details.lupia-accordion .faq-inner {
  overflow: hidden;
}

/* 7. Hover Card Ambient Spotlight */
.lupia-card-spotlight {
  position: relative;
  overflow: hidden;
  transition: transform 0.24s cubic-bezier(0.16, 1, 0.3, 1), border-color 0.24s ease, box-shadow 0.24s ease;
}

.lupia-card-spotlight:hover {
  border-color: rgba(0, 212, 229, 0.45) !important;
  box-shadow: 0 10px 30px -10px rgba(0, 212, 229, 0.18) !important;
  transform: translateY(-2px);
}