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

@keyframes slideUp {
  from {
    opacity: 0;
    transform: translateY(28px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

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

@keyframes slideInFromLeft {
  from {
    opacity: 0;
    transform: translateX(-24px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

@keyframes slideInFromRight {
  from {
    opacity: 0;
    transform: translateX(24px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

@keyframes scaleIn {
  from {
    opacity: 0;
    transform: scale(0.96);
  }
  to {
    opacity: 1;
    transform: scale(1);
  }
}

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

@keyframes pulse {
  0%,
  100% {
    opacity: 1;
  }
  50% {
    opacity: 0.72;
  }
}

@keyframes shimmer {
  0% {
    background-position: -1000px 0;
  }
  100% {
    background-position: 1000px 0;
  }
}

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

@keyframes float-laptop {
  0%,
  100% {
    transform: perspective(1000px) rotateY(-12deg) rotateX(8deg) translateY(0);
  }
  50% {
    transform: perspective(1000px) rotateY(-12deg) rotateX(8deg) translateY(-10px);
  }
}

@keyframes float-mobile {
  0%,
  100% {
    transform: perspective(1000px) rotateY(12deg) rotateX(4deg) translateY(0);
  }
  50% {
    transform: perspective(1000px) rotateY(12deg) rotateX(4deg) translateY(-14px);
  }
}

@keyframes float-dashboard {
  0%,
  100% {
    transform: perspective(1000px) rotateY(-6deg) rotateX(4deg) translateY(0);
  }
  50% {
    transform: perspective(1000px) rotateY(-6deg) rotateX(4deg) translateY(-8px);
  }
}

.transition-fast {
  transition: all var(--transition-fast);
}

.transition-normal {
  transition: all var(--transition-normal);
}

.transition-slow {
  transition: all var(--transition-slow);
}

.animate-in {
  animation: slideUp var(--transition-slow);
}

.header {
  transition: box-shadow var(--transition-fast), background var(--transition-fast);
}

.header__mobile-nav {
  animation: slideDown var(--transition-normal);
}

.btn {
  will-change: transform;
}

.card,
.service-card,
.portfolio-item,
.client-icon,
.stat-card {
  transition:
    transform var(--transition-normal),
    box-shadow var(--transition-normal),
    border-color var(--transition-normal);
}

.service-card:hover,
.portfolio-item:hover,
.client-icon:hover,
.stat-card:hover {
  transform: translateY(-6px);
}

.form__input:focus,
.form__textarea:focus {
  animation: scaleIn var(--transition-fast);
}

.portfolio-item__overlay {
  transition: opacity var(--transition-normal);
}

.back-to-top {
  position: fixed;
  bottom: 20px;
  right: 20px;
  width: 48px;
  height: 48px;
  border: 0;
  border-radius: 50%;
  background: var(--primary-blue);
  color: var(--white);
  box-shadow: var(--shadow-blue-sm);
  opacity: 0;
  visibility: hidden;
  transition: all var(--transition-fast);
  z-index: var(--z-fixed);
}

.back-to-top.visible {
  opacity: 1;
  visibility: visible;
}

.back-to-top:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-blue-md);
}