/* ============================================
   PORTFOLIO ANIMATIONS
   Modern, smooth animations for interactive UX
   ============================================ */

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

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

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

/* Progress bar fill animation */
@keyframes progressFill {
  from {
    width: 0;
  }
  to {
    width: var(--progress-width);
  }
}

/* Pulse animation for icons */
@keyframes pulse {
  0%, 100% {
    transform: scale(1);
  }
  50% {
    transform: scale(1.05);
  }
}

/* ============================================
   HERO SECTION ANIMATIONS
   ============================================ */

.hero--text-box {
  animation: fadeInLeft 0.8s ease-out;
}

.hero--image-box {
  animation: fadeInRight 0.8s ease-out 0.2s backwards;
}

.heading-sub {
  animation: fadeIn 0.6s ease-out 0.3s backwards;
}

.heading-primary {
  animation: fadeInUp 0.8s ease-out 0.4s backwards;
}

.hero--text-desc {
  animation: fadeInUp 0.8s ease-out 0.6s backwards;
}

.hero--social {
  animation: fadeInUp 0.8s ease-out 0.8s backwards;
}

/* ============================================
   PROJECT CARDS ANIMATIONS
   ============================================ */

.project-card {
  transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
  position: relative;
  overflow: hidden;
}

.project-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(61, 220, 132, 0.1), transparent);
  transition: left 0.6s;
}

.project-card:hover {
  transform: translateY(-10px);
  box-shadow: 10px 10px 25px #c1c9d6, -10px -10px 25px #ffffff;
}

.project-card:hover::before {
  left: 100%;
}

.project-card--head img {
  transition: transform 0.6s cubic-bezier(0.4, 0, 0.2, 1);
}

.project-card:hover .project-card--head img {
  transform: scale(1.1);
}

.project-title {
  position: relative;
  transition: color 0.3s ease;
}

.project-card:hover .project-title {
  color: #1B5E20;
}

.project-link::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 0;
  height: 2px;
  background: #3DDC84;
  transition: width 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

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

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

.animate-on-scroll {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.6s ease-out, transform 0.6s ease-out;
}

.animate-on-scroll.animated {
  opacity: 1;
  transform: translateY(0);
}

/* Staggered animation delays */
.project-card:nth-child(1) { animation: fadeInUp 0.6s ease-out 0.1s backwards; }
.project-card:nth-child(2) { animation: fadeInUp 0.6s ease-out 0.2s backwards; }
.project-card:nth-child(3) { animation: fadeInUp 0.6s ease-out 0.3s backwards; }
.project-card:nth-child(4) { animation: fadeInUp 0.6s ease-out 0.4s backwards; }
.project-card:nth-child(5) { animation: fadeInUp 0.6s ease-out 0.5s backwards; }
.project-card:nth-child(6) { animation: fadeInUp 0.6s ease-out 0.6s backwards; }
.project-card:nth-child(7) { animation: fadeInUp 0.6s ease-out 0.7s backwards; }
.project-card:nth-child(8) { animation: fadeInUp 0.6s ease-out 0.8s backwards; }
.project-card:nth-child(9) { animation: fadeInUp 0.6s ease-out 0.9s backwards; }

/* ============================================
   SKILL PROGRESS BARS
   ============================================ */

.skill-block {
  opacity: 0;
  transform: translateX(-20px);
  transition: opacity 0.6s ease-out, transform 0.6s ease-out;
}

.skill-block.animate {
  opacity: 1;
  transform: translateX(0);
}

.skill-progress span {
  width: 0 !important;
  transition: width 1.5s cubic-bezier(0.4, 0, 0.2, 1) 0.3s;
}

.skill-block.animate .skill-progress span {
  width: var(--skill-width) !important;
  animation: progressFill 1.5s cubic-bezier(0.4, 0, 0.2, 1) 0.3s;
}

/* ============================================
   TIMELINE ANIMATIONS
   ============================================ */

.timeline-step {
  opacity: 0;
  transform: translateX(-30px);
  transition: opacity 0.6s ease-out, transform 0.6s ease-out;
}

.timeline-step.animate {
  opacity: 1;
  transform: translateX(0);
}

.timeline-step:nth-child(1) { transition-delay: 0.1s; }
.timeline-step:nth-child(2) { transition-delay: 0.3s; }
.timeline-step:nth-child(3) { transition-delay: 0.5s; }

.timeline-arrow {
  position: relative;
  overflow: hidden;
}

.timeline-arrow::after {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(61, 220, 132, 0.3), transparent);
  animation: shimmer 2s infinite;
}

@keyframes shimmer {
  0% { left: -100%; }
  100% { left: 100%; }
}

/* ============================================
   FEATURE CARDS ANIMATIONS
   ============================================ */

.feat-box {
  transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
  position: relative;
}

.feat-box:hover {
  transform: translateY(-8px) scale(1.02);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.4);
}

.feat-icon {
  transition: all 0.4s ease;
}

.feat-box:hover .feat-icon {
  transform: scale(1.1) rotate(5deg);
  color: #3DDC84;
}

.feat-arrow {
  transition: transform 0.3s ease;
}

.feat-box:hover .feat-arrow {
  transform: translateX(8px);
  color: #1B5E20;
}

/* ============================================
   SOCIAL MEDIA ICONS
   ============================================ */

.social-link {
  position: relative;
  overflow: hidden;
}

.social-link::before {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  width: 0;
  height: 0;
  border-radius: 50%;
  background: rgba(61, 220, 132, 0.2);
  transform: translate(-50%, -50%);
  transition: width 0.4s ease, height 0.4s ease;
}

.social-link:hover::before {
  width: 100%;
  height: 100%;
}

.social-icon {
  position: relative;
  z-index: 1;
  transition: transform 0.3s ease, color 0.3s ease;
}

.social-link:hover .social-icon {
  transform: scale(1.2);
  color: #1B5E20;
}

.social-img {
  position: relative;
  z-index: 1;
  transition: transform 0.3s ease;
}

.social-link:hover .social-img {
  transform: scale(1.15);
}

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

.nav-link {
  position: relative;
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: 8px;
  left: 50%;
  transform: translateX(-50%);
  width: 0;
  height: 2px;
  background: #3DDC84;
  transition: width 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.nav-link:hover::after {
  width: 80%;
}

/* ============================================
   BUTTON ANIMATIONS
   ============================================ */

.btn {
  position: relative;
  overflow: hidden;
}

.btn::before {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  width: 0;
  height: 0;
  border-radius: 50%;
  background: rgba(61, 220, 132, 0.15);
  transform: translate(-50%, -50%);
  transition: width 0.6s ease, height 0.6s ease;
}

.btn:hover::before {
  width: 300px;
  height: 300px;
}

.btn span,
.btn i {
  position: relative;
  z-index: 1;
}

.btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.4);
}

/* ============================================
   SCROLL TO TOP BUTTON
   ============================================ */

.to-up-btn {
  transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

.to-up-btn:hover {
  transform: translateY(-3px);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.4);
}

.to-up-btn:hover .to-up-arrow {
  animation: bounce 0.6s ease infinite;
}

@keyframes bounce {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-5px); }
}

/* ============================================
   EDUCATION CARDS
   ============================================ */

.feat-box.card {
  transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

.feat-box.card:hover {
  transform: translateY(-8px) rotate(1deg);
  box-shadow: 10px 10px 25px #c1c9d6, -10px -10px 25px #ffffff;
}

.feat-box.card .feat-icon {
  transition: all 0.5s ease;
}

.feat-box.card:hover .feat-icon {
  transform: scale(1.15) rotate(360deg);
  color: #3DDC84;
}

/* ============================================
   HEADER ANIMATIONS
   ============================================ */

.main-header {
  animation: slideDown 0.6s ease-out;
}

.logo-name {
  transition: color 0.3s ease;
}

.inbio-logo:hover .logo-name {
  color: var(--color-accent);
}

/* ============================================
   SECTION HEADINGS
   ============================================ */

.heading-secondary {
  position: relative;
  display: inline-block;
}

.heading-secondary::after {
  content: '';
  position: absolute;
  bottom: -10px;
  left: 0;
  width: 60px;
  height: 3px;
  background: linear-gradient(90deg, #3DDC84, #1B5E20);
  border-radius: 2px;
  animation: expandWidth 0.8s ease-out;
}

@keyframes expandWidth {
  from {
    width: 0;
  }
  to {
    width: 60px;
  }
}

/* ============================================
   PROJECT INFO STATS
   ============================================ */

.project-stats i {
  transition: transform 0.3s ease;
  display: inline-block;
}

.project-card:hover .project-stats i {
  animation: heartbeat 0.6s ease;
}

@keyframes heartbeat {
  0%, 100% { transform: scale(1); }
  25% { transform: scale(1.2); }
  50% { transform: scale(1.1); }
  75% { transform: scale(1.15); }
}

/* ============================================
   SMOOTH SCROLL BEHAVIOR
   ============================================ */

html {
  scroll-behavior: smooth;
}

/* ============================================
   LOADING STATES
   ============================================ */

.hero--inbio-image {
  /* No animations for profile image - keep it professional */
  transition: none;
}

.hero--inbio-image:hover {
  /* No hover effects on profile image */
}

/* ============================================
   RESPONSIVE ANIMATIONS
   ============================================ */

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

/* ============================================
   INTERSECTION OBSERVER CLASSES
   ============================================ */

.fade-in-section {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.6s ease-out, transform 0.6s ease-out;
}

.fade-in-section.is-visible {
  opacity: 1;
  transform: translateY(0);
}

/* Stagger delays for multiple items */
.stagger-1 { transition-delay: 0.1s; }
.stagger-2 { transition-delay: 0.2s; }
.stagger-3 { transition-delay: 0.3s; }
.stagger-4 { transition-delay: 0.4s; }
.stagger-5 { transition-delay: 0.5s; }

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

/* Smooth color transitions */
a, button, .social-link, .feat-box, .nav-link {
  transition: all 0.3s ease;
}

/* Icon hover effects */
.feat-icon,
.social-icon,
.to-up-arrow {
  transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

/* Card content reveal */
.project-card .project-desc {
  opacity: 0.8;
  transform: translateY(5px);
  transition: opacity 0.3s ease, transform 0.3s ease;
}

.project-card:hover .project-desc {
  opacity: 1;
  transform: translateY(0);
}

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

/* GPU acceleration for smoother animations */
.project-card,
.feat-box,
.social-link,
.btn,
.timeline-step {
  will-change: transform;
}

/* Reduce animations on mobile for performance */
@media (max-width: 768px) {
  .project-card:hover {
    transform: translateY(-5px);
  }

  .feat-box:hover {
    transform: translateY(-4px) scale(1.01);
  }
}

/* Terminal cursor blink */
@keyframes blink {
  0%, 100% { border-color: var(--color-accent); }
  50%       { border-color: transparent; }
}