/* ==========================================================================
   ANIMATIONS & MICRO-INTERACTIONS
   MD. YEASIR ARAFAT — ELECTRICAL & ELECTRONIC PORTFOLIO
   ========================================================================== */

@keyframes reticleRotate {
  0% { transform: rotate(0deg); }
  100% { transform: rotate(360deg); }
}

@keyframes floatSubtle {
  0% { transform: translateY(0px); }
  100% { transform: translateY(-7px); }
}

@keyframes pulseGlow {
  0%, 100% {
    opacity: 0.5;
    transform: scale(1);
  }
  50% {
    opacity: 0.85;
    transform: scale(1.03);
  }
}

@keyframes currentFlow {
  0% {
    stroke-dashoffset: 100;
  }
  100% {
    stroke-dashoffset: 0;
  }
}

@keyframes waveformSweep {
  0% { transform: translateX(-100%); }
  100% { transform: translateX(100%); }
}

/* Scroll reveal initial states */
.reveal-on-scroll {
  opacity: 0;
  transform: translateY(22px);
  transition: opacity 0.6s cubic-bezier(0.16, 1, 0.3, 1), transform 0.6s cubic-bezier(0.16, 1, 0.3, 1);
  will-change: opacity, transform;
}

.reveal-on-scroll.revealed {
  opacity: 1;
  transform: translateY(0);
}

/* Staggered delay helpers */
.delay-1 { transition-delay: 80ms; }
.delay-2 { transition-delay: 160ms; }
.delay-3 { transition-delay: 240ms; }
.delay-4 { transition-delay: 320ms; }
.delay-5 { transition-delay: 400ms; }

/* --------------------------------------------------------------------------
   HERO ENTRANCE SEQUENCE (Section 5)
   Restrained, nonblocking, sequential reveal
   -------------------------------------------------------------------------- */
.hero-seq-bg {
  animation: fadeIn 0.45s cubic-bezier(0.16, 1, 0.3, 1) 0.05s both;
}

.hero-seq-eyebrow {
  animation: fadeUp 0.4s cubic-bezier(0.16, 1, 0.3, 1) 0.08s both;
}

.hero-seq-heading {
  animation: fadeUp 0.45s cubic-bezier(0.16, 1, 0.3, 1) 0.12s both;
}

.hero-seq-desc {
  animation: fadeUp 0.45s cubic-bezier(0.16, 1, 0.3, 1) 0.16s both;
}

.hero-seq-cta {
  animation: fadeUp 0.45s cubic-bezier(0.16, 1, 0.3, 1) 0.2s both;
}

.hero-seq-portrait {
  animation: portraitEntrance 0.55s cubic-bezier(0.16, 1, 0.3, 1) 0.15s both;
}

.hero-seq-badges {
  animation: fadeUp 0.45s cubic-bezier(0.16, 1, 0.3, 1) 0.25s both;
}

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

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

@keyframes portraitEntrance {
  from {
    opacity: 0;
    transform: scale(0.95) translateY(24px);
  }
  to {
    opacity: 1;
    transform: scale(1) translateY(0);
  }
}

/* --------------------------------------------------------------------------
   ELECTRICAL CURRENT-FLOW & LIGHTNING (Section 4)
   -------------------------------------------------------------------------- */
.circuit-trace-flow {
  stroke-dasharray: 10 18;
  animation: currentTraceMove 3.6s linear infinite;
}

@keyframes currentTraceMove {
  from { stroke-dashoffset: 56; }
  to { stroke-dashoffset: 0; }
}

.circuit-pulse-node {
  animation: pulseNode 2.4s ease-in-out infinite alternate;
}

@keyframes pulseNode {
  0% { r: 3; fill-opacity: 0.5; filter: drop-shadow(0 0 2px var(--accent-cyan)); }
  100% { r: 4.5; fill-opacity: 1; filter: drop-shadow(0 0 8px var(--accent-cyan)); }
}

/* Lightning Spark Effect */
.lightning-flash {
  animation: lightningSpark 0.4s ease-out;
}

@keyframes lightningSpark {
  0% { box-shadow: 0 0 0 rgba(var(--accent-cyan-rgb), 0); }
  25% { box-shadow: 0 0 25px rgba(var(--accent-cyan-rgb), 0.9), 0 0 45px rgba(255, 255, 255, 0.8); border-color: #ffffff; }
  100% { box-shadow: 0 0 0 rgba(var(--accent-cyan-rgb), 0); }
}

/* Interactive Oscilloscope Canvas Container */
.oscilloscope-box {
  width: 100%;
  height: 160px;
  background: var(--bg-tertiary);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  position: relative;
  overflow: hidden;
  margin-top: 1.5rem;
}

.oscilloscope-canvas {
  width: 100%;
  height: 100%;
  display: block;
}

.oscilloscope-overlay {
  position: absolute;
  top: 8px;
  right: 12px;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--accent-cyan);
  background: rgba(var(--accent-cyan-rgb), 0.1);
  padding: 0.2rem 0.5rem;
  border-radius: var(--radius-xs);
  pointer-events: none;
}

/* --------------------------------------------------------------------------
   PREFERS REDUCED MOTION (Mandatory Accessibility)
   -------------------------------------------------------------------------- */
@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-on-scroll {
    opacity: 1 !important;
    transform: none !important;
  }

  .circuit-reticle, .tech-spec-pill {
    animation: none !important;
  }
}