/**
 * YPYM Observatory — Elevated Skeleton & Kinetic Micro-Interactions
 */

/* ==========================================================================
   1. Elevated Skeleton System (Luminous Fluid Shimmer)
   ========================================================================== */

.skeleton-bone {
  position: relative;
  background-color: var(--bg-skeleton-base);
  overflow: hidden;
  border-radius: var(--radius-sm);
  display: inline-block;
  user-select: none;
}

/* Luminous Ambient Sweep across skeleton capsules */
.skeleton-bone::after {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: linear-gradient(
    95deg,
    transparent 0%,
    rgba(255, 255, 255, 0.45) 40%,
    rgba(255, 255, 255, 0.85) 50%,
    rgba(255, 255, 255, 0.45) 60%,
    transparent 100%
  );
  background-size: 200% 100%;
  animation: elevatedSkeletonSweep 1.8s cubic-bezier(0.4, 0, 0.2, 1) infinite;
}

@keyframes elevatedSkeletonSweep {
  0% {
    background-position: 200% 0;
  }
  100% {
    background-position: -200% 0;
  }
}

/* Skeleton Pill & Bar Variants */
.skeleton-pill {
  border-radius: var(--radius-pill);
}

.skeleton-circle {
  border-radius: 50%;
}

.skeleton-text-short {
  width: 70px;
  height: 14px;
}

.skeleton-text-medium {
  width: 140px;
  height: 15px;
}

.skeleton-text-long {
  width: 220px;
  height: 15px;
}

/* Morphing transition when turning from skeleton to real content */
.is-morphing-in {
  animation: morphIn 450ms var(--ease-spring) forwards;
}

@keyframes morphIn {
  0% {
    opacity: 0.2;
    transform: scale(0.97) translateY(4px);
    filter: blur(4px);
  }
  100% {
    opacity: 1;
    transform: scale(1) translateY(0);
    filter: blur(0);
  }
}

/* ==========================================================================
   2. Interactive Strikethrough (The Satisfying Checkmark Physics)
   ========================================================================== */

.task-label-wrapper {
  position: relative;
  display: inline-flex;
  align-items: center;
}

.task-label-text {
  transition: color 280ms var(--ease-smooth);
}

.task-strike-line {
  position: absolute;
  left: -2px;
  right: -2px;
  height: 1.8px;
  background-color: var(--text-muted);
  top: 52%;
  transform-origin: left center;
  transform: scaleX(0);
  transition: transform 320ms var(--ease-spring);
  pointer-events: none;
  border-radius: 2px;
}

/* Checked state */
.task-item.is-completed .task-label-text {
  color: var(--text-muted);
}

.task-item.is-completed .task-strike-line {
  transform: scaleX(1);
}

.task-item.is-completed .task-checkbox {
  background-color: #121417;
  border-color: #121417;
  transform: scale(1.05);
}

.task-item.is-completed .task-checkbox svg {
  stroke-dashoffset: 0;
  opacity: 1;
}

/* ==========================================================================
   3. Checkbox Micro-Interaction
   ========================================================================== */

.task-checkbox {
  width: 18px;
  height: 18px;
  border-radius: 50%;
  border: 1.5px solid var(--border-medium);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 240ms var(--ease-spring);
  flex-shrink: 0;
}

.task-checkbox svg {
  width: 10px;
  height: 10px;
  stroke: #ffffff;
  stroke-width: 2.4;
  stroke-linecap: round;
  stroke-linejoin: round;
  fill: none;
  stroke-dasharray: 20;
  stroke-dashoffset: 20;
  opacity: 0;
  transition: stroke-dashoffset 300ms var(--ease-bounce), opacity 200ms ease;
}

/* Checkbox Hover */
.task-item:hover .task-checkbox:not(.is-checked) {
  border-color: var(--accent-blue);
  background-color: rgba(2, 132, 246, 0.06);
}

/* ==========================================================================
   4. Staggered Entrance Animations (Core Web Vitals & LCP Safe)
   ========================================================================== */

/* Hero & Above-the-fold content MUST NEVER have opacity: 0 by default.
   Default opacity: 1 guarantees immediate LCP candidate registration in Lighthouse. */
.fade-in-up {
  opacity: 1;
  transform: translateY(0);
}

@media (prefers-reduced-motion: no-preference) {
  .fade-in-up {
    animation: fadeInUpSoft 500ms var(--ease-spring) both;
  }
}

.delay-1 { animation-delay: 40ms; }
.delay-2 { animation-delay: 80ms; }
.delay-3 { animation-delay: 140ms; }
.delay-4 { animation-delay: 200ms; }

@keyframes fadeInUpSoft {
  0% {
    opacity: 0.95;
    transform: translateY(8px);
  }
  100% {
    opacity: 1;
    transform: translateY(0);
  }
}

/* Subtle Floating Hover */
.hover-lift {
  transition: transform 300ms var(--ease-spring), box-shadow 300ms var(--ease-smooth);
}

.hover-lift:hover {
  transform: translateY(-2px);
}

/* ==========================================================================
   5. Butter-Smooth Scroll Reveal & Stagger Cascade
   ========================================================================== */

.scroll-reveal {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity 0.75s cubic-bezier(0.16, 1, 0.3, 1), transform 0.75s cubic-bezier(0.16, 1, 0.3, 1);
  will-change: opacity, transform;
}

.scroll-reveal.is-revealed {
  opacity: 1;
  transform: translateY(0);
}

.scroll-reveal.stagger-1 { transition-delay: 60ms; }
.scroll-reveal.stagger-2 { transition-delay: 130ms; }
.scroll-reveal.stagger-3 { transition-delay: 200ms; }
.scroll-reveal.stagger-4 { transition-delay: 270ms; }
.scroll-reveal.stagger-5 { transition-delay: 340ms; }

@media (prefers-reduced-motion: reduce) {
  .scroll-reveal,
  .fade-in-up {
    opacity: 1 !important;
    transform: none !important;
    transition: none !important;
    animation: none !important;
  }
}

/* ==========================================================================
   6. Architecture Vector Keyframe Animations
   ========================================================================== */

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

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

@keyframes dataPulseBeam {
  0% { stroke-dashoffset: 40; }
  100% { stroke-dashoffset: 0; }
}

@keyframes scanLineSilo {
  0% { transform: translateY(0); opacity: 0.2; }
  50% { transform: translateY(24px); opacity: 0.8; }
  100% { transform: translateY(0); opacity: 0.2; }
}

@keyframes shieldGlow {
  0%, 100% { filter: drop-shadow(0 0 2px rgba(16, 185, 129, 0.4)); }
  50% { filter: drop-shadow(0 0 8px rgba(16, 185, 129, 0.8)); }
}

.vector-anim-gear-1 {
  transform-origin: 30px 30px;
  animation: spinGearSlow 14s linear infinite;
}

.vector-anim-gear-2 {
  transform-origin: 66px 44px;
  animation: spinGearReverse 10s linear infinite;
}

.vector-anim-pulse-beam {
  stroke-dasharray: 6 4;
  animation: dataPulseBeam 1.6s linear infinite;
}

.vector-anim-scan {
  animation: scanLineSilo 3s ease-in-out infinite;
}

.vector-anim-shield {
  animation: shieldGlow 3s ease-in-out infinite;
}