/* ==========================================================================
   Scroll Animations & Micro-Interactions
   Lightweight, GPU-accelerated, respects prefers-reduced-motion.
   Duration: 400–700ms. Uses CSS transform + opacity only.
   ========================================================================== */

/* --------------------------------------------------------------------------
   1. REVEAL ANIMATIONS — Base States (hidden before IntersectionObserver)
   -------------------------------------------------------------------------- */

.reveal-fade-up {
  opacity: 0;
  transform: translateY(40px);
  transition: opacity 0.6s cubic-bezier(0.22, 1, 0.36, 1),
              transform 0.6s cubic-bezier(0.22, 1, 0.36, 1);
}

.reveal-fade-in {
  opacity: 0;
  transition: opacity 0.5s ease;
}

.reveal-slide-left {
  opacity: 0;
  transform: translateX(-40px);
  transition: opacity 0.6s cubic-bezier(0.22, 1, 0.36, 1),
              transform 0.6s cubic-bezier(0.22, 1, 0.36, 1);
}

.reveal-slide-right {
  opacity: 0;
  transform: translateX(40px);
  transition: opacity 0.6s cubic-bezier(0.22, 1, 0.36, 1),
              transform 0.6s cubic-bezier(0.22, 1, 0.36, 1);
}

.reveal-scale-in {
  opacity: 0;
  transform: scale(0.92);
  transition: opacity 0.5s cubic-bezier(0.22, 1, 0.36, 1),
              transform 0.5s cubic-bezier(0.22, 1, 0.36, 1);
}

/* --------------------------------------------------------------------------
   2. REVEAL — Visible State (added by IntersectionObserver)
   -------------------------------------------------------------------------- */

.reveal-fade-up.is-visible,
.reveal-fade-in.is-visible,
.reveal-slide-left.is-visible,
.reveal-slide-right.is-visible,
.reveal-scale-in.is-visible {
  opacity: 1;
  transform: translate(0, 0) scale(1);
}

/* --------------------------------------------------------------------------
   3. IMAGE REVEAL — Mask animation (bottom to top)
   -------------------------------------------------------------------------- */

.reveal-image {
  overflow: hidden;
  clip-path: inset(100% 0 0 0);
  transition: clip-path 0.8s cubic-bezier(0.22, 1, 0.36, 1);
}

.reveal-image.is-visible {
  clip-path: inset(0 0 0 0);
}

/* --------------------------------------------------------------------------
   4. STAGGER DELAYS — For grouped elements
   -------------------------------------------------------------------------- */

.reveal-stagger-1 { transition-delay: 0.1s; }
.reveal-stagger-2 { transition-delay: 0.2s; }
.reveal-stagger-3 { transition-delay: 0.3s; }
.reveal-stagger-4 { transition-delay: 0.4s; }
.reveal-stagger-5 { transition-delay: 0.5s; }
.reveal-stagger-6 { transition-delay: 0.6s; }

/* --------------------------------------------------------------------------
   5. MICRO-INTERACTIONS — Card Hover
   -------------------------------------------------------------------------- */

.hover-lift {
  transition: transform 0.35s cubic-bezier(0.22, 1, 0.36, 1),
              box-shadow 0.35s ease;
}

.hover-lift:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg, 0 8px 30px rgba(0, 0, 0, 0.1));
}

/* --------------------------------------------------------------------------
   6. MICRO-INTERACTIONS — Image Hover (subtle zoom)
   -------------------------------------------------------------------------- */

.hover-zoom {
  overflow: hidden;
}

.hover-zoom img {
  transition: transform 0.5s cubic-bezier(0.22, 1, 0.36, 1);
  will-change: transform;
}

.hover-zoom:hover img {
  transform: scale(1.03);
}

/* --------------------------------------------------------------------------
   7. MICRO-INTERACTIONS — Button Arrow Movement
   -------------------------------------------------------------------------- */

.hover-arrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

.hover-arrow .arrow-icon {
  display: inline-block;
  transition: transform 0.3s cubic-bezier(0.22, 1, 0.36, 1);
}

.hover-arrow:hover .arrow-icon {
  transform: translateX(4px);
}

/* --------------------------------------------------------------------------
   8. MICRO-INTERACTIONS — Link Underline Slide
   -------------------------------------------------------------------------- */

.hover-underline {
  position: relative;
  display: inline-block;
}

.hover-underline::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--accent, #FFB646);
  transition: width 0.3s cubic-bezier(0.22, 1, 0.36, 1);
}

.hover-underline:hover::after {
  width: 100%;
}

/* --------------------------------------------------------------------------
   9. MICRO-INTERACTIONS — Navbar Link Active Indicator
   -------------------------------------------------------------------------- */

.nav-link-animated {
  position: relative;
}

.nav-link-animated::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 50%;
  width: 0;
  height: 2px;
  background: var(--accent, #FFB646);
  transition: width 0.3s ease, left 0.3s ease;
}

.nav-link-animated:hover::after,
.nav-link-animated.active::after {
  width: 100%;
  left: 0;
}

/* --------------------------------------------------------------------------
   10. MICRO-INTERACTIONS — Project Card Hover
   -------------------------------------------------------------------------- */

.project-card-hover {
  transition: transform 0.4s cubic-bezier(0.22, 1, 0.36, 1),
              box-shadow 0.4s ease;
}

.project-card-hover:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg, 0 8px 30px rgba(0, 0, 0, 0.1));
}

.project-card-hover .project-card__image {
  overflow: hidden;
}

.project-card-hover .project-card__image img {
  transition: transform 0.5s cubic-bezier(0.22, 1, 0.36, 1);
}

.project-card-hover:hover .project-card__image img {
  transform: scale(1.04);
}

.project-card-hover .project-card__arrow {
  transition: transform 0.3s cubic-bezier(0.22, 1, 0.36, 1);
}

.project-card-hover:hover .project-card__arrow {
  transform: translateX(4px);
}

/* --------------------------------------------------------------------------
   11. PLACEHOLDER IMAGE — Consistent grayscale placeholder blocks
   -------------------------------------------------------------------------- */

.cs-placeholder {
  background: linear-gradient(135deg, #E8E8E4 0%, #D4D4D0 50%, #E0E0DC 100%);
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 200px;
  position: relative;
  overflow: hidden;
}

.cs-placeholder::before {
  content: '';
  position: absolute;
  inset: 0;
  background: repeating-linear-gradient(
    45deg,
    transparent,
    transparent 10px,
    rgba(0, 0, 0, 0.02) 10px,
    rgba(0, 0, 0, 0.02) 20px
  );
}

.cs-placeholder__label {
  position: relative;
  z-index: 1;
  font-family: "DM Sans", sans-serif;
  font-size: 14px;
  font-weight: 600;
  color: #8A8A86;
  text-transform: uppercase;
  letter-spacing: 2px;
  padding: 12px 24px;
  border: 2px dashed #B8B8B4;
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.6);
}

.cs-placeholder--tall {
  min-height: 400px;
}

.cs-placeholder--short {
  min-height: 120px;
}

.cs-placeholder--avatar {
  width: 64px;
  height: 64px;
  min-height: auto;
  border-radius: 50%;
  border: 3px solid var(--accent, #FFB646);
}

.cs-placeholder--avatar .cs-placeholder__label {
  font-size: 10px;
  padding: 4px 8px;
  border: none;
  background: transparent;
}

/* --------------------------------------------------------------------------
   12. REDUCED MOTION — Disable animations for users who prefer it
   -------------------------------------------------------------------------- */

@media (prefers-reduced-motion: reduce) {
  .reveal-fade-up,
  .reveal-fade-in,
  .reveal-slide-left,
  .reveal-slide-right,
  .reveal-scale-in,
  .reveal-image {
    opacity: 1;
    transform: none;
    clip-path: none;
    transition: none;
  }

  .hover-lift,
  .hover-zoom img,
  .hover-arrow .arrow-icon,
  .hover-underline::after,
  .nav-link-animated::after,
  .project-card-hover,
  .project-card-hover .project-card__image img,
  .project-card-hover .project-card__arrow {
    transition: none;
  }

  .hover-lift:hover {
    transform: none;
  }

  .hover-zoom:hover img {
    transform: none;
  }

  .project-card-hover:hover {
    transform: none;
  }

  .project-card-hover:hover .project-card__image img {
    transform: none;
  }
}

/* --------------------------------------------------------------------------
   13. PAGE TRANSITION — Subtle fade-in on load
   -------------------------------------------------------------------------- */

@keyframes page-fade-in {
  from { opacity: 0; transform: translateY(8px); }
  to   { opacity: 1; transform: translateY(0); }
}

body {
  animation: page-fade-in 0.35s cubic-bezier(0.22, 1, 0.36, 1) both;
}

@media (prefers-reduced-motion: reduce) {
  body {
    animation: none;
  }
}