/* ========================================
   SKILLS DZ — Effects & 3D Animations
   GPU-accelerated, prefers-reduced-motion safe
   ======================================== */

/* ── Scroll Reveal ── */
.reveal {
  opacity: 0;
  transform: translateY(36px);
  transition: opacity 0.65s cubic-bezier(0.22, 1, 0.36, 1),
              transform 0.65s cubic-bezier(0.22, 1, 0.36, 1);
  will-change: opacity, transform;
}
.reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
}
.reveal--delay-1 { transition-delay: 0.1s; }
.reveal--delay-2 { transition-delay: 0.2s; }
.reveal--delay-3 { transition-delay: 0.3s; }
.reveal--delay-4 { transition-delay: 0.4s; }

.reveal--left {
  transform: translateX(-40px);
}
.reveal--left.is-visible { transform: translateX(0); }

.reveal--right {
  transform: translateX(40px);
}
.reveal--right.is-visible { transform: translateX(0); }

/* ── 3D Tilt Cards ── */
.tilt-3d {
  transform-style: preserve-3d;
  perspective: 800px;
  will-change: transform;
}
.tilt-3d__inner {
  transition: transform 0.15s ease-out;
  transform-style: preserve-3d;
  will-change: transform;
}
.tilt-3d:hover .tilt-3d__inner {
  box-shadow: 0 24px 48px rgba(30, 91, 255, 0.15);
}

/* Shine overlay on tilt */
.tilt-3d__shine {
  position: absolute; inset: 0;
  border-radius: inherit;
  pointer-events: none;
  opacity: 0;
  transition: opacity 0.3s ease;
  background: radial-gradient(
    circle at var(--shine-x, 50%) var(--shine-y, 50%),
    rgba(255,255,255,0.25) 0%,
    transparent 60%
  );
  z-index: 2;
}
.tilt-3d:hover .tilt-3d__shine { opacity: 1; }

/* ── Glass Morphism Nav ── */
.header--glass {
  background: rgba(255, 255, 255, 0.72) !important;
  backdrop-filter: blur(28px) saturate(1.6) !important;
  box-shadow: 0 1px 0 rgba(11, 19, 49, 0.06),
              0 8px 32px rgba(11, 19, 49, 0.06);
}

/* ── Ripple Effect ── */
.ripple {
  position: relative;
  overflow: hidden;
}
.ripple-wave {
  position: absolute;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.35);
  transform: scale(0);
  animation: rippleExpand 0.6s cubic-bezier(0.22, 1, 0.36, 1) forwards;
  pointer-events: none;
  will-change: transform, opacity;
}
@keyframes rippleExpand {
  to { transform: scale(4); opacity: 0; }
}

/* ── Glow Pulse ── */
.glow-pulse {
  position: relative;
}
.glow-pulse::before {
  content: '';
  position: absolute; inset: -2px;
  border-radius: inherit;
  background: linear-gradient(135deg, #1E5BFF, #00C4FF, #1E5BFF);
  background-size: 300% 300%;
  animation: glowShift 3s ease infinite;
  z-index: -1;
  opacity: 0;
  transition: opacity 0.3s ease;
  filter: blur(12px);
}
.glow-pulse:hover::before { opacity: 1; }

@keyframes glowShift {
  0%, 100% { background-position: 0% 50%; }
  50% { background-position: 100% 50%; }
}

/* ── Floating Particles ── */
.particle {
  position: absolute;
  width: 4px; height: 4px;
  border-radius: 50%;
  background: rgba(0, 196, 255, 0.4);
  pointer-events: none;
  will-change: transform, opacity;
  animation: particleDrift linear infinite;
}

@keyframes particleDrift {
  0% { transform: translateY(0) translateX(0) scale(1); opacity: 0; }
  10% { opacity: 1; }
  90% { opacity: 1; }
  100% { transform: translateY(-600px) translateX(40px) scale(0.3); opacity: 0; }
}

/* ── Smooth Section Transitions ── */
.hero__stat-num {
  text-shadow: 0 0 30px rgba(0, 196, 255, 0.3);
}

/* ── Card Hover Glow Border ── */
.card-glow {
  position: relative;
  z-index: 0;
}
.card-glow::after {
  content: '';
  position: absolute; inset: 0;
  border-radius: inherit;
  border: 2px solid transparent;
  background: linear-gradient(135deg, rgba(30,91,255,0.4), rgba(0,196,255,0.4)) border-box;
  -webkit-mask: linear-gradient(#fff 0 0) padding-box, linear-gradient(#fff 0 0);
  mask: linear-gradient(#fff 0 0) padding-box, linear-gradient(#fff 0 0);
  -webkit-mask-composite: xor;
  mask-composite: exclude;
  opacity: 0;
  transition: opacity 0.3s ease;
  pointer-events: none;
  z-index: -1;
}
.card-glow:hover::after { opacity: 1; }

/* ── Smooth Section Transitions ── */
.section {
  position: relative;
}

/* ── Button Press Effect ── */
.btn:active {
  transform: scale(0.97) !important;
  transition-duration: 0.08s;
}

/* ── FAQ Smooth Open ── */
.faq details[open] > *:not(summary) {
  animation: faqSlide 0.3s ease;
}
@keyframes faqSlide {
  from { opacity: 0; transform: translateY(-8px); }
  to { opacity: 1; transform: translateY(0); }
}

/* ── FAQ Smooth Open ── */
.nav--mobile-open {
  display: flex !important;
  flex-direction: column;
  position: fixed;
  top: 64px; left: 0; right: 0; bottom: 0;
  background: rgba(255,255,255,0.97);
  backdrop-filter: blur(20px);
  padding: 32px 24px;
  gap: 24px;
  z-index: 100;
  animation: navSlide 0.3s cubic-bezier(0.22, 1, 0.36, 1);
}
@keyframes navSlide {
  from { opacity: 0; transform: translateY(-16px); }
  to { opacity: 1; transform: translateY(0); }
}

/* ── Smooth Scroll Target Offset ── */
html { scroll-padding-top: 80px; }

/* ── Reduced Motion ── */
@media (prefers-reduced-motion: reduce) {
  .reveal { transition: none; opacity: 1; transform: none; }
  .tilt-3d__inner { transition: none; }
  .ripple-wave { animation: none; }
  .particle { animation: none; display: none; }
  .glow-pulse::before { animation: none; }
  .card-glow::after { transition: none; }
}