/* ==========================================
   INGENR Animations — animations.css
   Keyframes, Scroll Reveals, Motion Prefs
   ========================================== */

/* ===== KEYFRAME DEFINITIONS ===== */

@keyframes fadeUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

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

@keyframes fadeInLeft {
  from {
    opacity: 0;
    transform: translateX(-30px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

@keyframes fadeInRight {
  from {
    opacity: 0;
    transform: translateX(30px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

@keyframes scaleIn {
  from {
    opacity: 0;
    transform: scale(0.9);
  }
  to {
    opacity: 1;
    transform: scale(1);
  }
}

@keyframes slideDown {
  from {
    opacity: 0;
    transform: translateY(-20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

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

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.6; }
}

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

@keyframes float {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-8px); }
}

@keyframes glowPulse {
  0%, 100% {
    box-shadow: 0 0 20px var(--accent-glow);
  }
  50% {
    box-shadow: 0 0 40px var(--accent-glow-strong);
  }
}

@keyframes drawLine {
  from { stroke-dashoffset: 1000; }
  to { stroke-dashoffset: 0; }
}

@keyframes checkmark {
  0% {
    stroke-dashoffset: 50;
    opacity: 0;
  }
  50% {
    opacity: 1;
  }
  100% {
    stroke-dashoffset: 0;
    opacity: 1;
  }
}

@keyframes counterPulse {
  0% { transform: scale(1); }
  50% { transform: scale(1.05); }
  100% { transform: scale(1); }
}

/* ===== SCROLL REVEAL INITIAL STATES ===== */
/* Elements with .reveal class start invisible, GSAP animates them in */

.reveal {
  opacity: 0;
  transform: translateY(30px);
  will-change: opacity, transform;
}

.reveal--left {
  opacity: 0;
  transform: translateX(-30px);
  will-change: opacity, transform;
}

.reveal--right {
  opacity: 0;
  transform: translateX(30px);
  will-change: opacity, transform;
}

.reveal--scale {
  opacity: 0;
  transform: scale(0.9);
  will-change: opacity, transform;
}

/* ===== HOVER TRANSITION STATES ===== */

.hover-lift {
  transition:
    transform var(--transition-base),
    box-shadow var(--transition-base);
}

.hover-lift:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-accent);
}

.hover-glow {
  transition:
    box-shadow var(--transition-base),
    border-color var(--transition-base);
}

.hover-glow:hover {
  box-shadow: 0 0 24px var(--accent-glow);
  border-color: rgba(200, 134, 46, 0.4);
}

.hover-scale {
  transition: transform var(--transition-base);
}

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

/* ===== LINK UNDERLINE ANIMATION ===== */
.link-animated {
  position: relative;
  display: inline-block;
}

.link-animated::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--accent);
  transition: width var(--transition-base);
}

.link-animated:hover::after {
  width: 100%;
}

/* ===== ICON ROTATION ON HOVER ===== */
.hover-rotate {
  transition: transform var(--transition-base);
}

.hover-rotate:hover {
  transform: rotate(15deg);
}

/* ===== STAGGER ANIMATION DELAYS ===== */
.stagger-1 { transition-delay: 0ms; }
.stagger-2 { transition-delay: 100ms; }
.stagger-3 { transition-delay: 200ms; }
.stagger-4 { transition-delay: 300ms; }
.stagger-5 { transition-delay: 400ms; }
.stagger-6 { transition-delay: 500ms; }

/* ===== LOADING SPINNER ===== */
.spinner {
  display: inline-block;
  width: 20px;
  height: 20px;
  border: 2px solid rgba(255, 255, 255, 0.3);
  border-top-color: var(--text-primary);
  border-radius: 50%;
  animation: spin 0.6s linear infinite;
}

/* ===== NAVBAR TRANSITION ===== */
.navbar--scrolled {
  background: rgba(10, 25, 47, 0.92) !important;
  backdrop-filter: blur(20px) saturate(180%);
  -webkit-backdrop-filter: blur(20px) saturate(180%);
  box-shadow: 0 1px 20px rgba(0, 0, 0, 0.4);
}

/* ===== GRAYSCALE TO COLOR (Team Cards) ===== */
.grayscale-hover {
  filter: grayscale(100%);
  transition: filter var(--transition-slow);
}

.grayscale-hover:hover {
  filter: grayscale(0%);
}

/* ===== PREFERS-REDUCED-MOTION ===== */
/* Respect user's system preference for reduced motion */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }

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

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

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

  .grayscale-hover {
    filter: none;
  }

  .float-animation {
    animation: none;
  }
}