/* Animations */

/* Scroll Reveal */
.reveal {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

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

/* Stagger children animation - reduced to 3 for faster info delivery */
.reveal:nth-child(1) { transition-delay: 0ms; }
.reveal:nth-child(2) { transition-delay: 100ms; }
.reveal:nth-child(3) { transition-delay: 200ms; }
.reveal:nth-child(n+4) { transition-delay: 200ms; }

/* Hero animations */
.hero .reveal:nth-child(1) { transition-delay: 0ms; }
.hero .reveal:nth-child(2) { transition-delay: 150ms; }
.hero .reveal:nth-child(3) { transition-delay: 300ms; }
.hero .reveal:nth-child(4) { transition-delay: 450ms; }

/* Button hover animations */
.btn {
  position: relative;
  overflow: hidden;
}

.btn::after {
  display: none;
}

/* Card hover animations */
.skill-card,
.project-card,
.education-card,
.contact-card {
  will-change: auto;
}

/* Nav link animation */
.nav__link {
  position: relative;
}

.nav__link::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 2px;
  background-color: var(--color-primary);
  transition: width var(--transition-fast);
}

.nav__link:hover::after,
.nav__link.active::after {
  width: 100%;
}

/* Timeline marker - static (no pulse) */
.timeline__marker {
  animation: none;
}

@keyframes pulse {
  0% {
    box-shadow: 0 0 0 0 rgba(5, 83, 177, 0.4);
  }
  70% {
    box-shadow: 0 0 0 10px rgba(5, 83, 177, 0);
  }
  100% {
    box-shadow: 0 0 0 0 rgba(5, 83, 177, 0);
  }
}

/* Skill card icon animation */
.skill-card__icon {
  transition: transform var(--transition-base);
}

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

/* Language toggle animation */
#lang-toggle {
  position: relative;
  overflow: hidden;
}

#lang-toggle > span {
  transition: transform var(--transition-fast);
}

#lang-toggle:hover > span {
  transform: scale(1.1);
}

/* Reduce motion for accessibility */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }

  .reveal {
    opacity: 1;
    transform: none;
  }

  html {
    scroll-behavior: auto;
  }
}

/* Loading animation */
.loading {
  position: relative;
}

.loading::after {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.4), transparent);
  animation: shimmer 1.5s infinite;
}

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

/* Fade in animation */
@keyframes fadeIn {
  from {
    opacity: 0;
  }
  to {
    opacity: 1;
  }
}

/* Slide up animation */
@keyframes slideUp {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* Scale animation for badges */
.project-card__badge {
  transition: transform var(--transition-fast);
}

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

/* Typing cursor animation */
.typing-cursor {
  animation: blink 1s step-end infinite;
}

@keyframes blink {
  0%, 50% { opacity: 1; }
  51%, 100% { opacity: 0; }
}

/* Theme transition */
.theme-transitions,
.theme-transitions *,
.theme-transitions *::before,
.theme-transitions *::after {
  transition: background-color 0.3s ease,
              color 0.2s ease,
              border-color 0.3s ease,
              box-shadow 0.3s ease;
}

/* Skill card enhanced hover */
.skill-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 3px;
  background: var(--gradient-primary);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--transition-base);
}

.skill-card {
  position: relative;
  overflow: hidden;
}

.skill-card:hover::before {
  transform: scaleX(1);
}

.skill-card:hover {
  box-shadow: var(--shadow-lg);
}

/* Timeline marker dark mode - static (no pulse) */
[data-theme="dark"] .timeline__marker {
  animation: none;
}

@keyframes pulse-dark {
  0% {
    box-shadow: 0 0 0 0 rgba(0, 217, 255, 0.4);
  }
  70% {
    box-shadow: 0 0 0 10px rgba(0, 217, 255, 0);
  }
  100% {
    box-shadow: 0 0 0 0 rgba(0, 217, 255, 0);
  }
}

/* ================================
   Mobile Menu Stagger Animation
   ================================ */

/* Menu items start hidden when menu opens */
.nav__menu .nav__item {
  opacity: 1;
  transform: translateX(0);
}

/* When menu is active (mobile), animate items */
@media (max-width: 767px) {
  .nav__menu .nav__item {
    opacity: 0;
    transform: translateX(20px);
    transition: opacity 0.3s ease, transform 0.3s ease;
  }

  .nav__menu.active .nav__item {
    opacity: 1;
    transform: translateX(0);
  }

  /* Stagger delays for each menu item */
  .nav__menu.active .nav__item:nth-child(1) { transition-delay: 50ms; }
  .nav__menu.active .nav__item:nth-child(2) { transition-delay: 100ms; }
  .nav__menu.active .nav__item:nth-child(3) { transition-delay: 150ms; }
  .nav__menu.active .nav__item:nth-child(4) { transition-delay: 200ms; }
  .nav__menu.active .nav__item:nth-child(5) { transition-delay: 250ms; }
  .nav__menu.active .nav__item:nth-child(6) { transition-delay: 300ms; }
  .nav__menu.active .nav__item:nth-child(7) { transition-delay: 350ms; }
  .nav__menu.active .nav__item:nth-child(8) { transition-delay: 400ms; }
  .nav__menu.active .nav__item:nth-child(9) { transition-delay: 450ms; }
}

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

/* ================================
   Contact Availability Ripple Animation
   ================================ */
.contact__availability-dot::before {
  display: none;
}

@keyframes availabilityRipple {
  0% {
    transform: scale(1);
    opacity: 0.4;
  }
  100% {
    transform: scale(2.5);
    opacity: 0;
  }
}

/* Contact card icon bounce on hover */
.contact-card:hover .contact-card__icon svg {
  animation: iconBounce 0.6s ease;
}

@keyframes iconBounce {
  0%, 100% { transform: translateY(0); }
  25% { transform: translateY(-4px); }
  50% { transform: translateY(0); }
  75% { transform: translateY(-2px); }
}

/* ================================
   Featured Project Glow Animation
   ================================ */
.project-card--featured::before {
  animation: none;
  opacity: 1;
}

@keyframes featuredGlow {
  0%, 100% {
    opacity: 0.7;
  }
  50% {
    opacity: 1;
  }
}

/* Featured badge shimmer */
.project-card--featured .project-card__badges::before {
  background: linear-gradient(
    90deg,
    var(--color-primary) 0%,
    var(--color-accent) 50%,
    var(--color-primary) 100%
  );
  background-size: 200% 100%;
  animation: badgeShimmer 2s ease infinite;
}

@keyframes badgeShimmer {
  0%, 100% { background-position: 0% 50%; }
  50% { background-position: 100% 50%; }
}

/* ================================
   Skill Progress Bar Glow
   ================================ */
.skill-progress__fill.animate {
  box-shadow: 0 0 8px rgba(0, 217, 255, 0.4);
}

[data-theme="dark"] .skill-progress__fill.animate {
  box-shadow: 0 0 12px rgba(0, 217, 255, 0.6);
}