/* Advanced Animations & Micro-interactions */
/* Serene Space AI - Smooth, professional animations */

/* ===================================
   KEYFRAME ANIMATIONS
   =================================== */

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

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

@keyframes slideInUp {
  from {
    transform: translateY(100%);
  }
  to {
    transform: translateY(0);
  }
}

@keyframes slideInDown {
  from {
    transform: translateY(-100%);
  }
  to {
    transform: translateY(0);
  }
}

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

@keyframes pulse {
  0%, 100% {
    opacity: 1;
    transform: scale(1);
  }
  50% {
    opacity: 0.8;
    transform: scale(1.05);
  }
}

@keyframes shake {
  0%, 100% {
    transform: translateX(0);
  }
  10%, 30%, 50%, 70%, 90% {
    transform: translateX(-5px);
  }
  20%, 40%, 60%, 80% {
    transform: translateX(5px);
  }
}

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

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

@keyframes ripple {
  0% {
    transform: scale(0);
    opacity: 1;
  }
  100% {
    transform: scale(4);
    opacity: 0;
  }
}

/* ===================================
   SCROLL ANIMATIONS
   =================================== */

.animate-on-scroll {
  opacity: 0;
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.animate-on-scroll.animated {
  opacity: 1;
}

.fade-in {
  animation: fadeIn 0.6s ease forwards;
}

.fade-in-up {
  animation: fadeInUp 0.8s ease forwards;
}

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

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

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

.scale-in {
  animation: scaleIn 0.6s ease forwards;
}

/* Stagger children animations */
.stagger-children > * {
  opacity: 0;
  animation: fadeInUp 0.6s ease forwards;
}

.stagger-children > *:nth-child(1) { animation-delay: 0.1s; }
.stagger-children > *:nth-child(2) { animation-delay: 0.2s; }
.stagger-children > *:nth-child(3) { animation-delay: 0.3s; }
.stagger-children > *:nth-child(4) { animation-delay: 0.4s; }
.stagger-children > *:nth-child(5) { animation-delay: 0.5s; }
.stagger-children > *:nth-child(6) { animation-delay: 0.6s; }

/* ===================================
   BUTTON MICRO-INTERACTIONS
   =================================== */

.btn-primary,
.btn-secondary,
.btn-large {
  position: relative;
  overflow: hidden;
  transform: translateZ(0);
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.btn-primary:hover,
.btn-secondary:hover,
.btn-large:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 16px rgba(0, 0, 0, 0.15);
}

.btn-primary:active,
.btn-secondary:active,
.btn-large:active {
  transform: translateY(0);
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

/* Ripple effect on button click */
.btn-ripple {
  position: relative;
  overflow: hidden;
}

.btn-ripple::after {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  width: 0;
  height: 0;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.5);
  transform: translate(-50%, -50%);
  transition: width 0.6s, height 0.6s;
}

.btn-ripple:active::after {
  width: 300px;
  height: 300px;
}

/* Shimmer effect on hover */
.btn-shimmer {
  background-size: 200% 100%;
  background-image: linear-gradient(
    90deg,
    var(--primary) 25%,
    var(--primary-dark) 50%,
    var(--primary) 75%
  );
  animation: shimmer 3s infinite;
}

.btn-shimmer:hover {
  animation-duration: 1s;
}

/* ===================================
   CARD ANIMATIONS
   =================================== */

.pricing-card,
.testimonial-card,
.feature-card,
.step-card {
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  transform: translateZ(0);
}

.pricing-card:hover,
.testimonial-card:hover,
.feature-card:hover,
.step-card:hover {
  transform: translateY(-8px) scale(1.02);
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.15);
}

/* Card glow effect */
.card-glow {
  position: relative;
}

.card-glow::before {
  content: '';
  position: absolute;
  inset: -2px;
  border-radius: inherit;
  padding: 2px;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  -webkit-mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
  -webkit-mask-composite: xor;
  mask-composite: exclude;
  opacity: 0;
  transition: opacity 0.3s ease;
}

.card-glow:hover::before {
  opacity: 1;
}

/* ===================================
   LINK ANIMATIONS
   =================================== */

a {
  position: relative;
  transition: color 0.3s ease;
}

/* Underline animation */
a.underline-animate {
  text-decoration: none;
}

a.underline-animate::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 0;
  height: 2px;
  background: currentColor;
  transition: width 0.3s ease;
}

a.underline-animate:hover::after {
  width: 100%;
}

/* ===================================
   FORM ANIMATIONS
   =================================== */

input,
textarea,
select {
  transition: all 0.3s ease;
}

input:focus,
textarea:focus,
select:focus {
  transform: scale(1.02);
  box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
}

/* Label float animation */
.input-group {
  position: relative;
}

.input-group label {
  position: absolute;
  left: 12px;
  top: 50%;
  transform: translateY(-50%);
  transition: all 0.3s ease;
  pointer-events: none;
  color: var(--text-tertiary);
}

.input-group input:focus + label,
.input-group input:not(:placeholder-shown) + label {
  top: -8px;
  font-size: 0.75rem;
  color: var(--primary);
  background: var(--bg-primary);
  padding: 0 4px;
}

/* Success checkmark animation */
@keyframes checkmark {
  0% {
    stroke-dashoffset: 100;
  }
  100% {
    stroke-dashoffset: 0;
  }
}

.checkmark {
  stroke-dasharray: 100;
  stroke-dashoffset: 100;
  animation: checkmark 0.6s ease forwards;
}

/* ===================================
   LOADING ANIMATIONS
   =================================== */

.spinner {
  width: 40px;
  height: 40px;
  border: 4px solid var(--border-color);
  border-top-color: var(--primary);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

.pulse-loader {
  animation: pulse 1.5s ease-in-out infinite;
}

.dots-loader {
  display: flex;
  gap: 8px;
}

.dots-loader span {
  width: 8px;
  height: 8px;
  background: var(--primary);
  border-radius: 50%;
  animation: bounce 1.4s infinite ease-in-out both;
}

.dots-loader span:nth-child(1) { animation-delay: -0.32s; }
.dots-loader span:nth-child(2) { animation-delay: -0.16s; }

/* ===================================
   MODAL ANIMATIONS
   =================================== */

.modal-overlay {
  animation: fadeIn 0.3s ease;
}

.email-modal {
  animation: scaleIn 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.modal-close {
  transition: transform 0.2s ease;
}

.modal-close:hover {
  transform: rotate(90deg);
}

/* ===================================
   NAVIGATION ANIMATIONS
   =================================== */

.navbar {
  transition: all 0.3s ease;
}

.navbar.scrolled {
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
  backdrop-filter: blur(10px);
}

.nav-links a {
  position: relative;
  transition: color 0.3s ease;
}

.nav-links a::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 50%;
  width: 0;
  height: 2px;
  background: var(--primary);
  transform: translateX(-50%);
  transition: width 0.3s ease;
}

.nav-links a:hover::after {
  width: 100%;
}

/* Mobile menu slide in */
.mobile-menu {
  transform: translateX(100%);
  transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.mobile-menu.active {
  transform: translateX(0);
}

/* ===================================
   SCROLL PROGRESS INDICATOR
   =================================== */

.scroll-progress {
  position: fixed;
  top: 0;
  left: 0;
  width: 0;
  height: 4px;
  background: linear-gradient(90deg, var(--primary), var(--accent));
  z-index: 9999;
  transition: width 0.1s ease;
}

/* ===================================
   TOAST NOTIFICATIONS
   =================================== */

.toast {
  animation: slideInUp 0.3s ease, fadeIn 0.3s ease;
  transition: all 0.3s ease;
}

.toast.hiding {
  animation: fadeIn 0.3s ease reverse;
}

/* ===================================
   PARALLAX EFFECTS
   =================================== */

.parallax {
  transition: transform 0.5s cubic-bezier(0.4, 0, 0.2, 1);
}

/* ===================================
   HOVER EFFECTS
   =================================== */

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

.hover-lift:hover {
  transform: translateY(-4px);
}

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

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

.hover-brightness {
  transition: filter 0.3s ease;
}

.hover-brightness:hover {
  filter: brightness(1.1);
}

/* ===================================
   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;
  }
  
  .parallax {
    transform: none !important;
  }
}

/* ===================================
   PERFORMANCE OPTIMIZATIONS
   =================================== */

/* GPU acceleration for smooth animations */
.btn-primary,
.btn-secondary,
.btn-large,
.pricing-card,
.testimonial-card,
.feature-card {
  will-change: transform;
  transform: translateZ(0);
  backface-visibility: hidden;
  perspective: 1000px;
}

/* Remove will-change after animation */
.animated {
  will-change: auto;
}