/* Animations for ShanghaiWalk Website */

/* Fade In Animation */
@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Pulse Animation for Highlights */
@keyframes pulse {
    0% {
        transform: scale(1);
        box-shadow: 0 0 0 0 rgba(166, 25, 46, 0.4);
    }
    70% {
        transform: scale(1.05);
        box-shadow: 0 0 0 10px rgba(166, 25, 46, 0);
    }
    100% {
        transform: scale(1);
        box-shadow: 0 0 0 0 rgba(166, 25, 46, 0);
    }
}

/* Floating Animation */
@keyframes float {
    0% {
        transform: translateY(0px);
    }
    50% {
        transform: translateY(-10px);
    }
    100% {
        transform: translateY(0px);
    }
}

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

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

/* Slide In From Left */
@keyframes slideInLeft {
    from {
        transform: translateX(-100px);
        opacity: 0;
    }
    to {
        transform: translateX(0);
        opacity: 1;
    }
}

/* Slide In From Right */
@keyframes slideInRight {
    from {
        transform: translateX(100px);
        opacity: 0;
    }
    to {
        transform: translateX(0);
        opacity: 1;
    }
}

/* Bounce Animation */
@keyframes bounce {
    0%, 20%, 50%, 80%, 100% {
        transform: translateY(0);
    }
    40% {
        transform: translateY(-20px);
    }
    60% {
        transform: translateY(-10px);
    }
}

/* Reveal Text Animation */
@keyframes revealText {
    from {
        clip-path: inset(0 100% 0 0);
    }
    to {
        clip-path: inset(0 0 0 0);
    }
}

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

/* Apply animations to elements */
.fade-in {
    animation: fadeIn 1s ease forwards;
}

.staggered-fade-in > * {
    opacity: 0;
    animation: fadeIn 0.8s ease forwards;
}

.staggered-fade-in > *:nth-child(1) { animation-delay: 0.1s; }
.staggered-fade-in > *:nth-child(2) { animation-delay: 0.3s; }
.staggered-fade-in > *:nth-child(3) { animation-delay: 0.5s; }
.staggered-fade-in > *:nth-child(4) { animation-delay: 0.7s; }
.staggered-fade-in > *:nth-child(5) { animation-delay: 0.9s; }

.pulse-effect {
    animation: pulse 2s infinite;
}

.float-effect {
    animation: float 3s ease-in-out infinite;
}

.shimmer-effect {
    background: linear-gradient(90deg, 
        rgba(255, 255, 255, 0) 0%, 
        rgba(255, 255, 255, 0.6) 50%, 
        rgba(255, 255, 255, 0) 100%);
    background-size: 200% 100%;
    animation: shimmer 2s infinite;
}

.rotate-effect {
    animation: rotate 8s linear infinite;
}

.slide-in-left {
    animation: slideInLeft 0.8s ease forwards;
}

.slide-in-right {
    animation: slideInRight 0.8s ease forwards;
}

.bounce-effect {
    animation: bounce 2s ease infinite;
}

.reveal-text {
    animation: revealText 1s ease forwards;
}

.gradient-shift {
    background: linear-gradient(270deg, var(--primary-color), var(--secondary-color), var(--accent-color));
    background-size: 200% 200%;
    animation: gradientShift 5s ease infinite;
}

/* Scroll-triggered animations */
.scroll-fade-in {
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.8s ease, transform 0.8s ease;
}

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

.scroll-slide-left {
    opacity: 0;
    transform: translateX(-50px);
    transition: opacity 0.8s ease, transform 0.8s ease;
}

.scroll-slide-left.visible {
    opacity: 1;
    transform: translateX(0);
}

.scroll-slide-right {
    opacity: 0;
    transform: translateX(50px);
    transition: opacity 0.8s ease, transform 0.8s ease;
}

.scroll-slide-right.visible {
    opacity: 1;
    transform: translateX(0);
}

/* Hover effects */
.hover-lift {
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.hover-lift:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 20px rgba(0, 0, 0, 0.1);
}

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

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

.hover-glow {
    transition: box-shadow 0.3s ease;
}

.hover-glow:hover {
    box-shadow: 0 0 15px rgba(166, 25, 46, 0.5);
}

/* Interactive elements */
.interactive-button {
    position: relative;
    overflow: hidden;
    transition: all 0.3s ease;
}

.interactive-button::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 5px;
    height: 5px;
    background: rgba(255, 255, 255, 0.5);
    opacity: 0;
    border-radius: 100%;
    transform: scale(1, 1) translate(-50%, -50%);
    transform-origin: 50% 50%;
}

.interactive-button:hover::after {
    animation: ripple 1s ease-out;
}

@keyframes ripple {
    0% {
        transform: scale(0, 0);
        opacity: 0.5;
    }
    100% {
        transform: scale(20, 20);
        opacity: 0;
    }
}

/* Page transitions */
.page-transition {
    animation: fadeIn 0.5s ease;
}

/* Loading animation */
.loading-spinner {
    width: 40px;
    height: 40px;
    border: 4px solid rgba(166, 25, 46, 0.1);
    border-radius: 50%;
    border-top-color: var(--primary-color);
    animation: rotate 1s linear infinite;
}

/* Parallax effect */
.parallax-container {
    perspective: 1px;
    height: 100vh;
    overflow-x: hidden;
    overflow-y: auto;
}

.parallax-layer {
    position: absolute;
    top: 0;
    right: 0;
    bottom: 0;
    left: 0;
}

.parallax-layer-back {
    transform: translateZ(-1px) scale(2);
}

.parallax-layer-base {
    transform: translateZ(0);
}

/* Animated underline for links */
.animated-underline {
    position: relative;
    text-decoration: none;
}

.animated-underline::after {
    content: '';
    position: absolute;
    width: 100%;
    height: 2px;
    bottom: 0;
    left: 0;
    background-color: var(--primary-color);
    transform: scaleX(0);
    transform-origin: bottom right;
    transition: transform 0.3s ease-out;
}

.animated-underline:hover::after {
    transform: scaleX(1);
    transform-origin: bottom left;
}