/* ============================================================
   TechChatLab — Animations Stylesheet
   ============================================================ */

/* ============================================================
   KEYFRAMES
   ============================================================ */

/* Fade & Slide */
@keyframes fadeIn {
  from { opacity: 0; }
  to   { opacity: 1; }
}

@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(40px); }
  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(-40px); }
  to   { opacity: 1; transform: translateX(0); }
}

@keyframes fadeInRight {
  from { opacity: 0; transform: translateX(40px); }
  to   { opacity: 1; transform: translateX(0); }
}

@keyframes scaleIn {
  from { opacity: 0; transform: scale(0.85); }
  to   { opacity: 1; transform: scale(1); }
}

/* Continuous Animations */
@keyframes float {
  0%, 100% { transform: translateY(0px); }
  50%       { transform: translateY(-14px); }
}

@keyframes floatSlow {
  0%, 100% { transform: translateY(0px) rotate(0deg); }
  33%       { transform: translateY(-10px) rotate(1deg); }
  66%       { transform: translateY(-5px) rotate(-1deg); }
}

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50%       { opacity: 0.5; }
}

@keyframes tagPulse {
  0%, 100% { transform: scale(1); opacity: 1; box-shadow: 0 0 0 0 rgba(0, 217, 255, 0.5); }
  50%       { transform: scale(1.15); opacity: 0.8; box-shadow: 0 0 0 6px rgba(0, 217, 255, 0); }
}

@keyframes glowPulse {
  0%, 100% { box-shadow: 0 0 20px rgba(0, 217, 255, 0.2); }
  50%       { box-shadow: 0 0 40px rgba(0, 217, 255, 0.5), 0 0 80px rgba(0, 217, 255, 0.2); }
}

@keyframes glowPulsePurple {
  0%, 100% { box-shadow: 0 0 20px rgba(139, 92, 246, 0.2); }
  50%       { box-shadow: 0 0 40px rgba(139, 92, 246, 0.5), 0 0 80px rgba(139, 92, 246, 0.2); }
}

/* Gradient Animations */
@keyframes gradientShift {
  0%   { background-position: 0% 50%; }
  50%  { background-position: 100% 50%; }
  100% { background-position: 0% 50%; }
}

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

/* Shimmer effect */
@keyframes shimmer {
  0%   { background-position: -200% 0; }
  100% { background-position: 200% 0; }
}

/* Scan line */
@keyframes scanLine {
  0%   { top: -10%; opacity: 0.6; }
  100% { top: 110%; opacity: 0; }
}

/* Typing cursor */
@keyframes blink {
  0%, 100% { opacity: 1; }
  50%       { opacity: 0; }
}

/* Bounce */
@keyframes scrollBounce {
  0%, 100% { transform: translateX(-50%) translateY(0); opacity: 0.5; }
  50%       { transform: translateX(-50%) translateY(8px); opacity: 0.8; }
}

@keyframes bounceX {
  0%, 100% { transform: translateX(0); }
  50%       { transform: translateX(6px); }
}

/* Badge intro */
@keyframes badgeFadeIn {
  from { opacity: 0; transform: scale(0.9) translateY(-10px); }
  to   { opacity: 1; transform: scale(1) translateY(0); }
}

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

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

/* Orbit */
@keyframes orbit {
  from { transform: rotate(0deg) translateX(80px) rotate(0deg); }
  to   { transform: rotate(360deg) translateX(80px) rotate(-360deg); }
}

/* Number counter */
@keyframes countUp {
  from { transform: translateY(20px); opacity: 0; }
  to   { transform: translateY(0); opacity: 1; }
}

/* Line expand */
@keyframes lineExpand {
  from { transform: scaleX(0); }
  to   { transform: scaleX(1); }
}

/* Draw path (for SVG) */
@keyframes drawPath {
  from { stroke-dashoffset: 100%; }
  to   { stroke-dashoffset: 0; }
}

/* Particle float */
@keyframes particleFloat1 {
  0%, 100% { transform: translate(0, 0) scale(1); opacity: 0.6; }
  25%       { transform: translate(20px, -30px) scale(1.1); opacity: 0.9; }
  50%       { transform: translate(40px, -10px) scale(0.9); opacity: 0.7; }
  75%       { transform: translate(10px, 20px) scale(1.05); opacity: 0.8; }
}

@keyframes particleFloat2 {
  0%, 100% { transform: translate(0, 0); opacity: 0.4; }
  33%       { transform: translate(-25px, 15px); opacity: 0.7; }
  66%       { transform: translate(15px, -20px); opacity: 0.5; }
}

@keyframes particleFloat3 {
  0%, 100% { transform: translate(0, 0) rotate(0deg); opacity: 0.5; }
  50%       { transform: translate(-15px, -25px) rotate(180deg); opacity: 0.8; }
}

/* Stagger helper */
@keyframes staggerFadeUp {
  from { opacity: 0; transform: translateY(30px); }
  to   { opacity: 1; transform: translateY(0); }
}

/* Glow flicker */
@keyframes glowFlicker {
  0%, 100% { opacity: 1; text-shadow: 0 0 10px rgba(0,217,255,0.8), 0 0 30px rgba(0,217,255,0.4); }
  25%       { opacity: 0.9; text-shadow: 0 0 6px rgba(0,217,255,0.6); }
  75%       { opacity: 1; text-shadow: 0 0 20px rgba(0,217,255,1), 0 0 50px rgba(0,217,255,0.5); }
}

/* Card shine on hover */
@keyframes cardShine {
  0%   { left: -100%; opacity: 0.6; }
  100% { left: 200%; opacity: 0; }
}

/* Hero bg move */
@keyframes heroBgMove {
  0%   { transform: translate(0, 0) scale(1); }
  33%  { transform: translate(-1%, 1%) scale(1.02); }
  66%  { transform: translate(1%, -0.5%) scale(0.99); }
  100% { transform: translate(0, 0) scale(1); }
}

/* Morphing blob */
@keyframes morphBlob {
  0%, 100% { border-radius: 60% 40% 30% 70% / 60% 30% 70% 40%; }
  25%       { border-radius: 30% 60% 70% 40% / 50% 60% 30% 60%; }
  50%       { border-radius: 50% 60% 30% 60% / 30% 60% 70% 40%; }
  75%       { border-radius: 70% 30% 60% 40% / 60% 40% 30% 70%; }
}

/* ============================================================
   ANIMATION UTILITY CLASSES
   ============================================================ */

.animate-float       { animation: float 6s ease-in-out infinite; }
.animate-float-slow  { animation: floatSlow 8s ease-in-out infinite; }
.animate-pulse       { animation: pulse 3s ease-in-out infinite; }
.animate-glow-cyan   { animation: glowPulse 3s ease-in-out infinite; }
.animate-glow-purple { animation: glowPulsePurple 3s ease-in-out infinite; }
.animate-spin-slow   { animation: spinSlow 20s linear infinite; }
.animate-gradient    {
  background-size: 200% 200%;
  animation: gradientShift 6s ease infinite;
}

/* Delays */
.delay-100  { animation-delay: 0.1s; }
.delay-200  { animation-delay: 0.2s; }
.delay-300  { animation-delay: 0.3s; }
.delay-400  { animation-delay: 0.4s; }
.delay-500  { animation-delay: 0.5s; }
.delay-600  { animation-delay: 0.6s; }
.delay-700  { animation-delay: 0.7s; }
.delay-800  { animation-delay: 0.8s; }
.delay-1000 { animation-delay: 1s; }

/* ============================================================
   SCROLL REVEAL (added by JS with IntersectionObserver)
   ============================================================ */

.reveal {
  opacity: 0;
  transform: translateY(40px);
  transition: opacity 0.7s var(--ease-out), transform 0.7s var(--ease-out);
}

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

.reveal-left {
  opacity: 0;
  transform: translateX(-40px);
  transition: opacity 0.7s var(--ease-out), transform 0.7s var(--ease-out);
}
.reveal-left.visible {
  opacity: 1;
  transform: translateX(0);
}

.reveal-right {
  opacity: 0;
  transform: translateX(40px);
  transition: opacity 0.7s var(--ease-out), transform 0.7s var(--ease-out);
}
.reveal-right.visible {
  opacity: 1;
  transform: translateX(0);
}

.reveal-scale {
  opacity: 0;
  transform: scale(0.88);
  transition: opacity 0.7s var(--ease-out), transform 0.7s var(--ease-out);
}
.reveal-scale.visible {
  opacity: 1;
  transform: scale(1);
}

/* Stagger children */
.stagger > * {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.6s var(--ease-out), transform 0.6s var(--ease-out);
}
.stagger.visible > *:nth-child(1) { opacity: 1; transform: none; transition-delay: 0s; }
.stagger.visible > *:nth-child(2) { opacity: 1; transform: none; transition-delay: 0.1s; }
.stagger.visible > *:nth-child(3) { opacity: 1; transform: none; transition-delay: 0.2s; }
.stagger.visible > *:nth-child(4) { opacity: 1; transform: none; transition-delay: 0.3s; }
.stagger.visible > *:nth-child(5) { opacity: 1; transform: none; transition-delay: 0.4s; }
.stagger.visible > *:nth-child(6) { opacity: 1; transform: none; transition-delay: 0.5s; }
.stagger.visible > *:nth-child(7) { opacity: 1; transform: none; transition-delay: 0.6s; }
.stagger.visible > *:nth-child(8) { opacity: 1; transform: none; transition-delay: 0.7s; }

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

/* Shine overlay on hover */
.shine-hover {
  position: relative;
  overflow: hidden;
}
.shine-hover::after {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 60%;
  height: 100%;
  background: linear-gradient(
    90deg,
    transparent,
    rgba(255, 255, 255, 0.06),
    transparent
  );
  transition: none;
  pointer-events: none;
}
.shine-hover:hover::after {
  animation: cardShine 0.6s ease forwards;
}

/* Lift hover */
.hover-lift {
  transition: transform 0.3s var(--ease-spring), box-shadow 0.3s var(--ease);
}
.hover-lift:hover {
  transform: translateY(-6px);
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.5);
}

/* Glow hover */
.hover-glow-cyan:hover {
  box-shadow: var(--glow-cyan);
}
.hover-glow-purple:hover {
  box-shadow: var(--glow-purple);
}

/* ============================================================
   CYBER DECORATIVE ELEMENTS
   ============================================================ */

/* Corner decorations */
.cyber-corner {
  position: relative;
}
.cyber-corner::before,
.cyber-corner::after {
  content: '';
  position: absolute;
  width: 14px;
  height: 14px;
  border-color: var(--cyan);
  border-style: solid;
  opacity: 0.6;
}
.cyber-corner::before {
  top: -2px;
  left: -2px;
  border-width: 2px 0 0 2px;
}
.cyber-corner::after {
  bottom: -2px;
  right: -2px;
  border-width: 0 2px 2px 0;
}

/* Scan line effect on sections */
.scanline-effect {
  position: relative;
  overflow: hidden;
}
.scanline-effect::after {
  content: '';
  position: absolute;
  left: 0;
  right: 0;
  height: 2px;
  background: linear-gradient(90deg, transparent, rgba(0,217,255,0.4), transparent);
  animation: scanLine 6s linear infinite;
  pointer-events: none;
}

/* Glowing dots */
.dot-glow {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--cyan);
  box-shadow: 0 0 10px var(--cyan), 0 0 20px rgba(0,217,255,0.4);
  animation: pulse 2s ease-in-out infinite;
  display: inline-block;
}
.dot-glow--purple {
  background: var(--purple);
  box-shadow: 0 0 10px var(--purple), 0 0 20px rgba(139,92,246,0.4);
}

/* Circuit line decoration */
.circuit-line {
  position: relative;
}
.circuit-line::after {
  content: '';
  position: absolute;
  bottom: -1px;
  left: 0;
  width: 100%;
  height: 1px;
  background: linear-gradient(90deg, var(--cyan), var(--purple), transparent);
  animation: lineExpand 1.5s ease forwards;
}

/* Blob */
.blob {
  border-radius: 60% 40% 30% 70% / 60% 30% 70% 40%;
  animation: morphBlob 12s ease-in-out infinite;
}

/* ============================================================
   LOADING SCREEN
   ============================================================ */
#page-loader {
  position: fixed;
  inset: 0;
  background: var(--bg-deepest);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  z-index: 9999;
  transition: opacity 0.6s ease, visibility 0.6s ease;
}
#page-loader.hidden {
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
}

.loader-logo {
  margin-bottom: 40px;
  animation: float 3s ease-in-out infinite;
}

.loader-bar-wrap {
  width: 200px;
  height: 2px;
  background: rgba(255,255,255,0.06);
  border-radius: 2px;
  overflow: hidden;
  margin-bottom: 20px;
}
.loader-bar {
  height: 100%;
  background: var(--grad-brand);
  border-radius: 2px;
  animation: loaderProgress 1.8s ease forwards;
}

@keyframes loaderProgress {
  0%   { width: 0%; }
  60%  { width: 85%; }
  100% { width: 100%; }
}

.loader-text {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.2em;
  color: var(--text-muted);
  animation: pulse 1.5s ease-in-out infinite;
}

/* ============================================================
   CYBER GRID BG (reusable section background)
   ============================================================ */
.cyber-grid-bg {
  position: relative;
}
.cyber-grid-bg::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(0, 217, 255, 0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(0, 217, 255, 0.03) 1px, transparent 1px);
  background-size: 60px 60px;
  pointer-events: none;
  mask-image: radial-gradient(ellipse 80% 80% at 50% 50%, black 30%, transparent 100%);
}

/* ============================================================
   TECH TAGS (animated)
   ============================================================ */
.tech-stack {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}
.tech-tag {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 500;
  padding: 4px 12px;
  border-radius: 4px;
  background: rgba(0, 217, 255, 0.06);
  border: 1px solid rgba(0, 217, 255, 0.12);
  color: var(--cyan);
  transition: all 0.2s ease;
  cursor: default;
}
.tech-tag:hover {
  background: rgba(0, 217, 255, 0.14);
  border-color: rgba(0, 217, 255, 0.35);
  box-shadow: 0 0 12px rgba(0,217,255,0.2);
}

/* ============================================================
   TYPING EFFECT
   ============================================================ */
.typewriter::after {
  content: '|';
  animation: blink 1s step-end infinite;
  color: var(--cyan);
  margin-left: 2px;
}

/* ============================================================
   PROGRESS BARS (animated)
   ============================================================ */
.progress-bar-wrap {
  background: rgba(255,255,255,0.05);
  border-radius: var(--r-full);
  height: 6px;
  overflow: hidden;
}
.progress-bar {
  height: 100%;
  border-radius: var(--r-full);
  background: var(--grad-brand);
  width: 0%;
  transition: width 1.5s var(--ease-out);
  position: relative;
}
.progress-bar::after {
  content: '';
  position: absolute;
  right: 0;
  top: 50%;
  transform: translateY(-50%);
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--cyan);
  box-shadow: 0 0 8px var(--cyan);
}

/* ============================================================
   GRADIENT ANIMATED BORDER
   ============================================================ */
.grad-border {
  position: relative;
  border-radius: var(--r-lg);
}
.grad-border::before {
  content: '';
  position: absolute;
  inset: -2px;
  border-radius: inherit;
  background: conic-gradient(
    from var(--angle, 0deg),
    var(--cyan) 0%,
    var(--purple) 25%,
    var(--pink) 50%,
    var(--purple) 75%,
    var(--cyan) 100%
  );
  z-index: -1;
  animation: borderRotate 4s linear infinite;
}
@property --angle {
  syntax: '<angle>';
  initial-value: 0deg;
  inherits: false;
}

/* ============================================================
   PARTICLE DECORATIONS (CSS only)
   ============================================================ */
.particles-decoration {
  position: absolute;
  inset: 0;
  overflow: hidden;
  pointer-events: none;
}
.particles-decoration .p {
  position: absolute;
  border-radius: 50%;
  opacity: 0.3;
}
.particles-decoration .p1 {
  width: 4px; height: 4px;
  background: var(--cyan);
  left: 15%; top: 20%;
  animation: particleFloat1 9s ease-in-out infinite;
  box-shadow: 0 0 6px var(--cyan);
}
.particles-decoration .p2 {
  width: 6px; height: 6px;
  background: var(--purple);
  left: 75%; top: 15%;
  animation: particleFloat2 12s ease-in-out infinite;
  box-shadow: 0 0 8px var(--purple);
}
.particles-decoration .p3 {
  width: 3px; height: 3px;
  background: var(--pink);
  left: 40%; top: 70%;
  animation: particleFloat3 8s ease-in-out infinite;
  box-shadow: 0 0 5px var(--pink);
}
.particles-decoration .p4 {
  width: 5px; height: 5px;
  background: var(--cyan);
  left: 85%; top: 60%;
  animation: particleFloat1 11s ease-in-out infinite 2s;
  box-shadow: 0 0 8px var(--cyan);
}
.particles-decoration .p5 {
  width: 4px; height: 4px;
  background: var(--purple);
  left: 5%; top: 75%;
  animation: particleFloat2 10s ease-in-out infinite 1s;
  box-shadow: 0 0 6px var(--purple);
}
.particles-decoration .p6 {
  width: 3px; height: 3px;
  background: var(--green);
  left: 55%; top: 10%;
  animation: particleFloat3 14s ease-in-out infinite 3s;
  box-shadow: 0 0 5px var(--green);
}

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