/* ==========================================================================
   🎬 PERFECT GULF LIMITED (PGL) - ANIMATION SUITE
   Rich animations, scroll triggers, micro-interactions
   ========================================================================== */

/* 1. SCROLL REVEAL DEFINITIONS */
.reveal {
  opacity: 0;
  transition: opacity 0.8s cubic-bezier(0.25, 0.46, 0.45, 0.94),
              transform 0.8s cubic-bezier(0.25, 0.46, 0.45, 0.94);
  will-change: transform, opacity;
}

/* Directions */
.reveal.fade-in {
  transform: translateY(0);
}

.reveal.slide-up {
  transform: translateY(40px);
}

.reveal.slide-down {
  transform: translateY(-40px);
}

.reveal.slide-left {
  transform: translateX(-40px);
}

.reveal.slide-right {
  transform: translateX(40px);
}

.reveal.scale-up {
  transform: scale(0.92);
}

/* Active Reveal States (Triggered by main.js Intersection Observer) */
.reveal.visible {
  opacity: 1;
  transform: translate(0) scale(1);
}

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

/* 3. KEYFRAME ANIMATIONS */

/* floating micro-interaction */
@keyframes float {
  0% {
    transform: translateY(0px);
  }
  50% {
    transform: translateY(-10px);
  }
  100% {
    transform: translateY(0px);
  }
}

.float-element {
  animation: float 4s ease-in-out infinite;
}

/* Pulsing effect for indicators */
@keyframes pulse-ring {
  0% {
    transform: scale(0.95);
    box-shadow: 0 0 0 0 rgba(19, 138, 220, 0.4);
  }
  70% {
    transform: scale(1);
    box-shadow: 0 0 0 10px rgba(19, 138, 220, 0);
  }
  100% {
    transform: scale(0.95);
    box-shadow: 0 0 0 0 rgba(19, 138, 220, 0);
  }
}

.pulse-indicator {
  animation: pulse-ring 2s cubic-bezier(0.455, 0.03, 0.515, 0.955) infinite;
}

/* Continuous slow spin for background gear icon shape */
@keyframes spin-slow {
  0% {
    transform: rotate(0deg);
  }
  100% {
    transform: rotate(360deg);
  }
}

.spin-slow {
  animation: spin-slow 20s linear infinite;
}

/* Shimmer load states */
@keyframes shimmer {
  0% {
    background-position: -468px 0;
  }
  100% {
    background-position: 468px 0;
  }
}

.skeleton-loading {
  background: #f6f7f8;
  background-image: linear-gradient(to right, #f6f7f8 0%, #edeef1 20%, #f6f7f8 40%, #f6f7f8 100%);
  background-repeat: no-repeat;
  background-size: 800px 104px;
  animation: shimmer 1.2s linear infinite forwards;
}

/* 4. HOVER AND FOCUS MICRO-INTERACTIONS */

/* Dynamic Border underline expansion for menu items */
.hover-underline {
  position: relative;
}

.hover-underline::after {
  content: '';
  position: absolute;
  width: 100%;
  transform: scaleX(0);
  height: 2px;
  bottom: -4px;
  left: 0;
  background-color: var(--light-blue);
  transform-origin: bottom right;
  transition: transform 0.25s ease-out;
}

.hover-underline:hover::after {
  transform: scaleX(1);
  transform-origin: bottom left;
}

/* Timeline Connector Draw Animation */
@keyframes drawLine {
  from {
    height: 0;
  }
  to {
    height: 100%;
  }
}

.animate-timeline-line {
  animation: drawLine 2s ease-in-out forwards;
}