/* Enhanced Scroll Animations */
:root {
  --animation-timing: cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

/* Base animation classes */
[data-scroll] {
  opacity: 0;
  transition-property: opacity, transform;
  transition-timing-function: var(--animation-timing);
  transition-duration: 0.8s;
  transition-delay: 0.1s;
  will-change: transform, opacity;
}

[data-scroll].in-view {
  opacity: 1;
}

/* Fade up animation (default) */
[data-scroll="fade-up"] {
  transform: translateY(50px);
}

[data-scroll="fade-up"].in-view {
  transform: translateY(0);
}

/* Fade down animation */
[data-scroll="fade-down"] {
  transform: translateY(-50px);
}

[data-scroll="fade-down"].in-view {
  transform: translateY(0);
}

/* Fade left animation */
[data-scroll="fade-left"] {
  transform: translateX(50px);
}

[data-scroll="fade-left"].in-view {
  transform: translateX(0);
}

/* Fade right animation */
[data-scroll="fade-right"] {
  transform: translateX(-50px);
}

[data-scroll="fade-right"].in-view {
  transform: translateX(0);
}

/* Zoom in animation */
[data-scroll="zoom-in"] {
  transform: scale(0.9);
}

[data-scroll="zoom-in"].in-view {
  transform: scale(1);
}

/* Zoom out animation */
[data-scroll="zoom-out"] {
  transform: scale(1.1);
}

[data-scroll="zoom-out"].in-view {
  transform: scale(1);
}

/* Flip animation */
[data-scroll="flip"] {
  transform: perspective(1000px) rotateY(90deg);
}

[data-scroll="flip"].in-view {
  transform: perspective(1000px) rotateY(0);
}

/* Rotate animation */
[data-scroll="rotate"] {
  transform: rotate(-15deg);
}

[data-scroll="rotate"].in-view {
  transform: rotate(0);
}

/* Blur animation */
[data-scroll="blur"] {
  filter: blur(10px);
}

[data-scroll="blur"].in-view {
  filter: blur(0);
}

/* Delay classes */
[data-delay="100"] { transition-delay: 0.1s; }
[data-delay="200"] { transition-delay: 0.2s; }
[data-delay="300"] { transition-delay: 0.3s; }
[data-delay="400"] { transition-delay: 0.4s; }
[data-delay="500"] { transition-delay: 0.5s; }
[data-delay="600"] { transition-delay: 0.6s; }
[data-delay="700"] { transition-delay: 0.7s; }
[data-delay="800"] { transition-delay: 0.8s; }
[data-delay="900"] { transition-delay: 0.9s; }
[data-delay="1000"] { transition-delay: 1s; }

/* Duration classes */
[data-duration="fast"] { transition-duration: 0.5s; }
[data-duration="normal"] { transition-duration: 0.8s; }
[data-duration="slow"] { transition-duration: 1.2s; }

/* Section-specific animations */
.section-title[data-scroll] {
  transition-duration: 1s;
}

.project-card[data-scroll] {
  transition-duration: 0.9s;
}

.skill-category[data-scroll] {
  transition-duration: 0.7s;
}

/* Staggered animations for lists and grids */
.stagger-item {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.6s var(--animation-timing), transform 0.6s var(--animation-timing);
}

.stagger-item.in-view {
  opacity: 1;
  transform: translateY(0);
}

/* Parallax effect */
.parallax {
  transition: transform 0.5s cubic-bezier(0.25, 0.46, 0.45, 0.94);
  will-change: transform;
}

/* Scroll progress indicator */
.scroll-progress {
  position: fixed;
  top: 0;
  left: 0;
  width: 0%;
  height: 3px;
  background: linear-gradient(to right, var(--primary), var(--secondary));
  z-index: 9999;
  transition: width 0.1s linear;
}

/* Scroll down indicator */
.scroll-down-indicator {
  position: absolute;
  bottom: 30px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  color: var(--light);
  opacity: 0.7;
  transition: opacity 0.3s;
  cursor: pointer;
}

.scroll-down-indicator:hover {
  opacity: 1;
}

.scroll-down-indicator span {
  font-size: 0.8rem;
  margin-bottom: 8px;
  text-transform: uppercase;
  letter-spacing: 1px;
}

.scroll-down-indicator .chevron {
  width: 20px;
  height: 8px;
  opacity: 0;
  transform: scale(0.3);
  animation: scroll-down-anim 3s infinite;
  position: relative;
}

.scroll-down-indicator .chevron:before,
.scroll-down-indicator .chevron:after {
  content: '';
  position: absolute;
  top: 0;
  height: 100%;
  width: 50%;
  background: var(--light);
}

.scroll-down-indicator .chevron:before {
  left: 0;
  transform: skewY(30deg);
}

.scroll-down-indicator .chevron:after {
  right: 0;
  transform: skewY(-30deg);
}

.scroll-down-indicator .chevron:nth-child(2) {
  animation-delay: 0.15s;
  margin-top: -3px;
}

.scroll-down-indicator .chevron:nth-child(3) {
  animation-delay: 0.3s;
  margin-top: -3px;
}

@keyframes scroll-down-anim {
  0% {
    opacity: 0;
    transform: translateY(-15px) scale(0.3);
  }
  20%, 35% {
    opacity: 1;
    transform: translateY(0) scale(1);
  }
  50%, 100% {
    opacity: 0;
    transform: translateY(15px) scale(0.3);
  }
}

/* Media Queries */
@media (max-width: 768px) {
  [data-scroll] {
    transition-delay: 0.05s;
  }
  
  [data-scroll="fade-up"],
  [data-scroll="fade-down"] {
    transform: translateY(30px);
  }
  
  [data-scroll="fade-left"],
  [data-scroll="fade-right"] {
    transform: translateX(0);
    transform: translateY(30px);
  }
}