/* ============================================================
   animations.css — Keyframes & Scroll-Reveal Utilities
   ============================================================ */

/* ----------------------------------------------------------
   Core Keyframes
   ---------------------------------------------------------- */

@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(40px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes fadeInDown {
  from {
    opacity: 0;
    transform: translateY(-40px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes fadeInLeft {
  from {
    opacity: 0;
    transform: translateX(-40px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

@keyframes fadeInRight {
  from {
    opacity: 0;
    transform: translateX(40px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

@keyframes fadeIn {
  from { opacity: 0; }
  to   { opacity: 1; }
}

/* Float — gentle y-axis oscillation */
@keyframes float {
  0%, 100% { transform: translateY(0px); }
  50%       { transform: translateY(-16px); }
}

/* Pulse — scale pulsing */
@keyframes pulse {
  0%, 100% { transform: scale(1); }
  50%       { transform: scale(1.06); }
}

/* Gradient shift for animated gradient text */
@keyframes gradientShift {
  0%   { background-position: 0% 50%; }
  50%  { background-position: 100% 50%; }
  100% { background-position: 0% 50%; }
}

/* Typing cursor blink */
@keyframes blink {
  0%, 100% { opacity: 1; }
  50%       { opacity: 0; }
}

/* Glow pulse — box-shadow pulsing */
@keyframes glowPulse {
  0%, 100% {
    box-shadow: 0 0 8px rgba(0, 212, 255, 0.4),
                0 0 20px rgba(0, 212, 255, 0.2);
  }
  50% {
    box-shadow: 0 0 18px rgba(0, 212, 255, 0.8),
                0 0 40px rgba(0, 212, 255, 0.4),
                0 0 60px rgba(123, 47, 255, 0.2);
  }
}

/* Particle random float */
@keyframes particleFloat {
  0%   { transform: translateY(0) translateX(0); opacity: 0.6; }
  25%  { transform: translateY(-20px) translateX(10px); opacity: 1; }
  50%  { transform: translateY(-10px) translateX(-10px); opacity: 0.7; }
  75%  { transform: translateY(-30px) translateX(5px); opacity: 1; }
  100% { transform: translateY(0) translateX(0); opacity: 0.6; }
}

/* Navbar slide in from top */
@keyframes slideInNav {
  from {
    opacity: 0;
    transform: translateY(-100%);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* Spinner / loading ring */
@keyframes spin {
  to { transform: rotate(360deg); }
}

/* Ripple for button clicks */
@keyframes ripple {
  to {
    transform: scale(4);
    opacity: 0;
  }
}

/* Shimmer for skeleton loading */
@keyframes shimmer {
  0%   { background-position: -1000px 0; }
  100% { background-position:  1000px 0; }
}

/* Scale in */
@keyframes scaleIn {
  from {
    opacity: 0;
    transform: scale(0.85);
  }
  to {
    opacity: 1;
    transform: scale(1);
  }
}

/* Rotate loop */
@keyframes rotateLoop {
  from { transform: rotate(0deg); }
  to   { transform: rotate(360deg); }
}

/* ----------------------------------------------------------
   Scroll-Reveal Base
   ---------------------------------------------------------- */

.reveal {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.7s cubic-bezier(0.4, 0, 0.2, 1),
              transform 0.7s cubic-bezier(0.4, 0, 0.2, 1);
  will-change: opacity, transform;
}

.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

/* Direction variants */
.reveal-left {
  opacity: 0;
  transform: translateX(-40px);
  transition: opacity 0.7s cubic-bezier(0.4, 0, 0.2, 1),
              transform 0.7s cubic-bezier(0.4, 0, 0.2, 1);
}
.reveal-left.visible {
  opacity: 1;
  transform: translateX(0);
}

.reveal-right {
  opacity: 0;
  transform: translateX(40px);
  transition: opacity 0.7s cubic-bezier(0.4, 0, 0.2, 1),
              transform 0.7s cubic-bezier(0.4, 0, 0.2, 1);
}
.reveal-right.visible {
  opacity: 1;
  transform: translateX(0);
}

.reveal-scale {
  opacity: 0;
  transform: scale(0.88);
  transition: opacity 0.7s cubic-bezier(0.4, 0, 0.2, 1),
              transform 0.7s cubic-bezier(0.4, 0, 0.2, 1);
}
.reveal-scale.visible {
  opacity: 1;
  transform: scale(1);
}

/* ----------------------------------------------------------
   Stagger Delays for Child Elements
   ---------------------------------------------------------- */

.stagger > *:nth-child(1)  { transition-delay: 0.05s; }
.stagger > *:nth-child(2)  { transition-delay: 0.12s; }
.stagger > *:nth-child(3)  { transition-delay: 0.19s; }
.stagger > *:nth-child(4)  { transition-delay: 0.26s; }
.stagger > *:nth-child(5)  { transition-delay: 0.33s; }
.stagger > *:nth-child(6)  { transition-delay: 0.40s; }
.stagger > *:nth-child(7)  { transition-delay: 0.47s; }
.stagger > *:nth-child(8)  { transition-delay: 0.54s; }
.stagger > *:nth-child(9)  { transition-delay: 0.61s; }
.stagger > *:nth-child(10) { transition-delay: 0.68s; }

/* ----------------------------------------------------------
   Utility Animation Classes
   ---------------------------------------------------------- */

.anim-float {
  animation: float 5s ease-in-out infinite;
}

.anim-pulse {
  animation: pulse 2.5s ease-in-out infinite;
}

.anim-glow {
  animation: glowPulse 3s ease-in-out infinite;
}

.anim-spin {
  animation: rotateLoop 8s linear infinite;
}

.anim-fade-in {
  animation: fadeIn 0.8s ease forwards;
}

.anim-fade-in-up {
  animation: fadeInUp 0.8s ease forwards;
}

/* ----------------------------------------------------------
   3D Card Hover Transform
   ---------------------------------------------------------- */

.card-3d {
  transition: transform 0.4s cubic-bezier(0.4, 0, 0.2, 1),
              box-shadow 0.4s ease;
  transform-style: preserve-3d;
}

.card-3d:hover {
  transform: translateY(-8px) rotateX(3deg);
}

/* ----------------------------------------------------------
   Loading Spinner
   ---------------------------------------------------------- */

.loading-spinner {
  width: 40px;
  height: 40px;
  border: 3px solid rgba(0, 212, 255, 0.15);
  border-top-color: #00d4ff;
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

/* ----------------------------------------------------------
   Reduced-Motion Overrides
   ---------------------------------------------------------- */

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }

  .reveal,
  .reveal-left,
  .reveal-right,
  .reveal-scale {
    opacity: 1;
    transform: none;
    transition: none;
  }
}