/* =====================================================
   Sheikh Abir Ali Portfolio - Animations
   GPU-accelerated CSS animations
   ===================================================== */

/* Keyframes */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

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

@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 float {
  0%, 100% {
    transform: translate(0, 0) rotate(0deg);
  }
  25% {
    transform: translate(10px, -20px) rotate(5deg);
  }
  50% {
    transform: translate(-10px, 10px) rotate(-5deg);
  }
  75% {
    transform: translate(20px, 20px) rotate(3deg);
  }
}

@keyframes pulse {
  0%, 100% {
    opacity: 1;
    transform: scale(1);
  }
  50% {
    opacity: 0.5;
    transform: scale(1.2);
  }
}

@keyframes pulse-glow {
  0%, 100% {
    opacity: 0.5;
    filter: blur(10px);
  }
  50% {
    opacity: 0.8;
    filter: blur(15px);
  }
}

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

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

@keyframes bounce {
  0%, 100% {
    transform: translateY(0);
  }
  50% {
    transform: translateY(-10px);
  }
}

@keyframes wave {
  0%, 100% {
    transform: translateY(0);
  }
  25% {
    transform: translateY(-5px);
  }
  75% {
    transform: translateY(5px);
  }
}

@keyframes gradient-shift {
  0% {
    background-position: 0% 50%;
  }
  50% {
    background-position: 100% 50%;
  }
  100% {
    background-position: 0% 50%;
  }
}

@keyframes glow-pulse {
  0%, 100% {
    box-shadow: 0 0 20px rgba(59, 130, 246, 0.3);
  }
  50% {
    box-shadow: 0 0 40px rgba(59, 130, 246, 0.6);
  }
}

@keyframes float-rotate {
  0%, 100% {
    transform: translateY(0) rotate(0deg);
  }
  50% {
    transform: translateY(-20px) rotate(10deg);
  }
}

@keyframes border-dance {
  0%, 100% {
    border-color: var(--accent-primary);
  }
  33% {
    border-color: var(--accent-secondary);
  }
  66% {
    border-color: var(--accent-success);
  }
}

/* Animation Classes */
.animate-fade-in-up {
  animation: fadeInUp 0.8s ease forwards;
}

.animate-fade-in-down {
  animation: fadeInDown 0.8s ease forwards;
}

.animate-fade-in-left {
  animation: fadeInLeft 0.8s ease forwards;
}

.animate-fade-in-right {
  animation: fadeInRight 0.8s ease forwards;
}

.animate-float {
  animation: float 6s ease-in-out infinite;
}

.animate-pulse {
  animation: pulse 2s ease-in-out infinite;
}

.animate-bounce {
  animation: bounce 2s ease-in-out infinite;
}

.animate-wave {
  animation: wave 3s ease-in-out infinite;
}

.animate-rotate {
  animation: rotate 10s linear infinite;
}

.animate-glow-pulse {
  animation: glow-pulse 2s ease-in-out infinite;
}

.animate-float-rotate {
  animation: float-rotate 8s ease-in-out infinite;
}

/* Delay Utilities */
.delay-1 { animation-delay: 0.1s; }
.delay-2 { animation-delay: 0.2s; }
.delay-3 { animation-delay: 0.3s; }
.delay-4 { animation-delay: 0.4s; }
.delay-5 { animation-delay: 0.5s; }
.delay-6 { animation-delay: 0.6s; }
.delay-7 { animation-delay: 0.7s; }
.delay-8 { animation-delay: 0.8s; }

/* Scroll Reveal Animations */
.reveal {
  opacity: 0;
  transform: translateY(40px);
  transition: opacity 0.8s ease, transform 0.8s ease;
}

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

.reveal-left {
  opacity: 0;
  transform: translateX(-40px);
  transition: opacity 0.8s ease, transform 0.8s ease;
}

.reveal-left.active {
  opacity: 1;
  transform: translateX(0);
}

.reveal-right {
  opacity: 0;
  transform: translateX(40px);
  transition: opacity 0.8s ease, transform 0.8s ease;
}

.reveal-right.active {
  opacity: 1;
  transform: translateX(0);
}

.reveal-scale {
  opacity: 0;
  transform: scale(0.9);
  transition: opacity 0.8s ease, transform 0.8s ease;
}

.reveal-scale.active {
  opacity: 1;
  transform: scale(1);
}

/* Staggered Children */
.stagger-children > * {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.5s ease, transform 0.5s ease;
}

.stagger-children.active > *:nth-child(1) { transition-delay: 0.1s; opacity: 1; transform: translateY(0); }
.stagger-children.active > *:nth-child(2) { transition-delay: 0.2s; opacity: 1; transform: translateY(0); }
.stagger-children.active > *:nth-child(3) { transition-delay: 0.3s; opacity: 1; transform: translateY(0); }
.stagger-children.active > *:nth-child(4) { transition-delay: 0.4s; opacity: 1; transform: translateY(0); }
.stagger-children.active > *:nth-child(5) { transition-delay: 0.5s; opacity: 1; transform: translateY(0); }
.stagger-children.active > *:nth-child(6) { transition-delay: 0.6s; opacity: 1; transform: translateY(0); }
.stagger-children.active > *:nth-child(7) { transition-delay: 0.7s; opacity: 1; transform: translateY(0); }
.stagger-children.active > *:nth-child(8) { transition-delay: 0.8s; opacity: 1; transform: translateY(0); }

/* Floating Particles (CSS-only) */
.particles {
  position: absolute;
  inset: 0;
  overflow: hidden;
  pointer-events: none;
}

.particle {
  position: absolute;
  width: 4px;
  height: 4px;
  background: var(--accent-primary);
  border-radius: 50%;
  opacity: 0.3;
  animation: particle-float 15s infinite;
}

.particle:nth-child(1) { left: 10%; animation-delay: 0s; }
.particle:nth-child(2) { left: 20%; animation-delay: 2s; }
.particle:nth-child(3) { left: 30%; animation-delay: 4s; }
.particle:nth-child(4) { left: 40%; animation-delay: 1s; }
.particle:nth-child(5) { left: 50%; animation-delay: 3s; }
.particle:nth-child(6) { left: 60%; animation-delay: 5s; }
.particle:nth-child(7) { left: 70%; animation-delay: 2.5s; }
.particle:nth-child(8) { left: 80%; animation-delay: 4.5s; }
.particle:nth-child(9) { left: 90%; animation-delay: 1.5s; }

@keyframes particle-float {
  0% {
    transform: translateY(100vh) scale(0);
    opacity: 0;
  }
  10% {
    opacity: 0.3;
    transform: translateY(80vh) scale(1);
  }
  90% {
    opacity: 0.3;
    transform: translateY(10vh) scale(1);
  }
  100% {
    transform: translateY(-10vh) scale(0);
    opacity: 0;
  }
}

/* Neon Glow Effects */
.neon-glow {
  position: relative;
}

.neon-glow::before {
  content: '';
  position: absolute;
  inset: -2px;
  background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
  border-radius: inherit;
  z-index: -1;
  filter: blur(8px);
  opacity: 0;
  transition: var(--transition-medium);
}

.neon-glow:hover::before {
  opacity: 0.5;
}

.neon-text {
  text-shadow: 
    0 0 5px var(--accent-primary),
    0 0 10px var(--accent-primary),
    0 0 20px var(--accent-primary),
    0 0 40px var(--accent-primary);
}

.neon-border {
  position: relative;
}

.neon-border::after {
  content: '';
  position: absolute;
  inset: 0;
  border-radius: inherit;
  background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
  z-index: -1;
  filter: blur(15px);
  opacity: 0.3;
  transition: var(--transition-medium);
}

.neon-border:hover::after {
  opacity: 0.6;
}

/* Animated Gradient Background */
.animated-gradient {
  background: linear-gradient(
    -45deg,
    var(--bg-primary),
    var(--bg-secondary),
    var(--bg-tertiary),
    var(--bg-secondary)
  );
  background-size: 400% 400%;
  animation: gradient-shift 15s ease infinite;
}

.gradient-text {
  background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary), var(--accent-success));
  background-size: 200% 200%;
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  animation: gradient-shift 5s ease infinite;
}

/* Hover Effects */
.hover-lift {
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.hover-lift:hover {
  transform: translateY(-8px);
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.3);
}

.hover-scale {
  transition: transform 0.3s ease;
}

.hover-scale:hover {
  transform: scale(1.05);
}

.hover-glow {
  transition: box-shadow 0.3s ease;
}

.hover-glow:hover {
  box-shadow: 0 0 30px rgba(59, 130, 246, 0.4);
}

/* Icon Animations */
.icon-hover {
  transition: transform 0.3s ease;
}

.icon-hover:hover {
  transform: scale(1.2) rotate(5deg);
}

/* Button Animations */
.btn-animated {
  position: relative;
  overflow: hidden;
}

.btn-animated::after {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  width: 0;
  height: 0;
  background: rgba(255, 255, 255, 0.2);
  border-radius: 50%;
  transform: translate(-50%, -50%);
  transition: width 0.6s ease, height 0.6s ease;
}

.btn-animated:hover::after {
  width: 300px;
  height: 300px;
}

/* Card Hover Animations */
.card-animated {
  transition: transform 0.4s ease, box-shadow 0.4s ease, border-color 0.4s ease;
}

.card-animated:hover {
  transform: translateY(-12px);
  box-shadow: 
    0 20px 40px rgba(0, 0, 0, 0.3),
    0 0 40px rgba(59, 130, 246, 0.15);
  border-color: var(--accent-primary);
}

/* Scroll Indicator Animation */
.scroll-indicator {
  position: absolute;
  bottom: 40px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  animation: bounce 2s ease-in-out infinite;
}

.scroll-indicator-text {
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 2px;
  color: var(--text-muted);
}

.scroll-indicator-icon {
  width: 24px;
  height: 40px;
  border: 2px solid var(--text-muted);
  border-radius: 12px;
  position: relative;
}

.scroll-indicator-icon::before {
  content: '';
  position: absolute;
  top: 6px;
  left: 50%;
  transform: translateX(-50%);
  width: 4px;
  height: 8px;
  background: var(--accent-primary);
  border-radius: 2px;
  animation: scroll-down 2s ease-in-out infinite;
}

@keyframes scroll-down {
  0% {
    opacity: 1;
    transform: translateX(-50%) translateY(0);
  }
  100% {
    opacity: 0;
    transform: translateX(-50%) translateY(12px);
  }
}

/* Loading Animation */
.loading-spinner {
  width: 40px;
  height: 40px;
  border: 3px solid var(--glass-border);
  border-top-color: var(--accent-primary);
  border-radius: 50%;
  animation: rotate 1s linear infinite;
}

/* Hero Typing Effect */
.typing-effect {
  overflow: hidden;
  border-right: 2px solid var(--accent-primary);
  white-space: nowrap;
  animation: 
    typing 3.5s steps(40, end),
    blink-caret 0.75s step-end infinite;
  max-width: fit-content;
}

@keyframes typing {
  from { width: 0 }
  to { width: 100% }
}

@keyframes blink-caret {
  from, to { border-color: transparent }
  50% { border-color: var(--accent-primary) }
}

/* Focus Ring Animation */
.focus-ring {
  position: relative;
}

.focus-ring:focus {
  outline: none;
}

.focus-ring:focus::after {
  content: '';
  position: absolute;
  inset: -4px;
  border-radius: inherit;
  border: 2px solid var(--accent-primary);
  animation: ring-pulse 1.5s ease-in-out infinite;
}

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

/* Reduced Motion */
@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;
  }
}

/* Intersection Observer Animation Triggers */
.reveal-on-scroll {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.6s ease-out, transform 0.6s ease-out;
}

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

/* Hero specific animations */
.hero-cta-1 {
  animation: fadeInUp 0.8s ease 0.2s forwards;
  opacity: 0;
}

.hero-cta-2 {
  animation: fadeInUp 0.8s ease 0.4s forwards;
  opacity: 0;
}

.hero-badge-anim {
  animation: fadeInUp 0.8s ease 0s forwards;
  opacity: 0;
}

/* Glass morphism shimmer */
.glass-shimmer {
  position: relative;
  overflow: hidden;
}

.glass-shimmer::after {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(
    90deg,
    transparent,
    rgba(255, 255, 255, 0.1),
    transparent
  );
  animation: shimmer 3s infinite;
}

/* Counter animation */
.counter {
  display: inline-block;
}

/* Link hover underline animation */
.link-animated {
  position: relative;
}

.link-animated::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--accent-primary);
  transition: width 0.3s ease;
}

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

/* Selection highlight */
::selection {
  background: var(--accent-primary);
  color: white;
}