:root {
    --transition-duration-fast: 150ms;
    --transition-duration-normal: 250ms;
    --transition-duration-slow: 350ms;
    --transition-timing: cubic-bezier(0.4, 0, 0.2, 1);
    --transition-timing-bounce: cubic-bezier(0.68, -0.55, 0.265, 1.55);
    --transition-timing-smooth: cubic-bezier(0.25, 0.1, 0.25, 1);
}

.page-transition-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: 9999;
    pointer-events: none;
    background: linear-gradient(135deg, rgba(232, 180, 184, 0.95), rgba(168, 213, 186, 0.95));
    opacity: 0;
    visibility: hidden;
    transition: opacity var(--transition-duration-normal) var(--transition-timing),
                visibility var(--transition-duration-normal) var(--transition-timing);
}

.page-transition-overlay.active {
    opacity: 1;
    visibility: visible;
    pointer-events: auto;
}

.page-transition-overlay .transition-content {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    text-align: center;
}

.page-transition-overlay .transition-spinner {
    width: 50px;
    height: 50px;
    border: 4px solid rgba(255, 255, 255, 0.3);
    border-top-color: white;
    border-radius: 50%;
    animation: transition-spin 0.8s linear infinite;
}

@keyframes transition-spin {
    to { transform: rotate(360deg); }
}

.page-transition-overlay .transition-text {
    color: white;
    font-size: 14px;
    font-weight: 500;
    margin-top: 15px;
    letter-spacing: 1px;
}

.page-slide-container {
    position: relative;
    overflow: hidden;
}

.page-slide-enter {
    animation: pageSlideEnter var(--transition-duration-slow) var(--transition-timing-smooth) forwards;
}

.page-slide-leave {
    animation: pageSlideLeave var(--transition-duration-slow) var(--transition-timing-smooth) forwards;
}

@keyframes pageSlideEnter {
    from {
        opacity: 0;
        transform: translateX(30px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

@keyframes pageSlideLeave {
    from {
        opacity: 1;
        transform: translateX(0);
    }
    to {
        opacity: 0;
        transform: translateX(-30px);
    }
}

.page-fade-enter {
    animation: pageFadeEnter var(--transition-duration-normal) var(--transition-timing) forwards;
}

.page-fade-leave {
    animation: pageFadeLeave var(--transition-duration-normal) var(--transition-timing) forwards;
}

@keyframes pageFadeEnter {
    from {
        opacity: 0;
        transform: scale(0.98);
    }
    to {
        opacity: 1;
        transform: scale(1);
    }
}

@keyframes pageFadeLeave {
    from {
        opacity: 1;
        transform: scale(1);
    }
    to {
        opacity: 0;
        transform: scale(1.02);
    }
}

.page-zoom-enter {
    animation: pageZoomEnter var(--transition-duration-slow) var(--transition-timing-bounce) forwards;
}

.page-zoom-leave {
    animation: pageZoomLeave var(--transition-duration-fast) var(--transition-timing) forwards;
}

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

@keyframes pageZoomLeave {
    from {
        opacity: 1;
        transform: scale(1);
    }
    to {
        opacity: 0;
        transform: scale(1.1);
    }
}

.page-flip-container {
    perspective: 1200px;
}

.page-flip-enter {
    animation: pageFlipEnter var(--transition-duration-slow) var(--transition-timing) forwards;
    transform-origin: center center;
    backface-visibility: hidden;
}

.page-flip-leave {
    animation: pageFlipLeave var(--transition-duration-slow) var(--transition-timing) forwards;
    transform-origin: center center;
    backface-visibility: hidden;
}

@keyframes pageFlipEnter {
    from {
        opacity: 0;
        transform: rotateY(-90deg);
    }
    to {
        opacity: 1;
        transform: rotateY(0);
    }
}

@keyframes pageFlipLeave {
    from {
        opacity: 1;
        transform: rotateY(0);
    }
    to {
        opacity: 0;
        transform: rotateY(90deg);
    }
}

.content-frame-wrapper {
    position: relative;
    width: 100%;
    height: 100%;
}

.content-frame-wrapper.transitioning {
    overflow: hidden;
}

.content-frame-wrapper .frame-loader {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: var(--background-color, #FFF5F5);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 10;
    opacity: 0;
    visibility: hidden;
    transition: opacity var(--transition-duration-fast) var(--transition-timing),
                visibility var(--transition-duration-fast) var(--transition-timing);
}

.content-frame-wrapper .frame-loader.visible {
    opacity: 1;
    visibility: visible;
}

.frame-loader .loader-spinner {
    width: 40px;
    height: 40px;
    border: 3px solid rgba(232, 180, 184, 0.2);
    border-top-color: var(--primary-color, #E8B4B8);
    border-radius: 50%;
    animation: transition-spin 0.7s linear infinite;
}

.frame-loader .loader-text {
    margin-top: 12px;
    color: var(--text-color, #2D3436);
    font-size: 14px;
    font-weight: 500;
}

.nav-link-transition {
    position: relative;
    overflow: hidden;
}

.nav-link-transition::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: linear-gradient(90deg, var(--primary-color, #E8B4B8), var(--secondary-color, #A8D5BA));
    transition: width var(--transition-duration-normal) var(--transition-timing);
}

.nav-link-transition:hover::after,
.nav-link-transition.active::after {
    width: 100%;
}

.skeleton-loading {
    background: linear-gradient(90deg, 
        rgba(232, 180, 184, 0.1) 25%, 
        rgba(232, 180, 184, 0.2) 50%, 
        rgba(232, 180, 184, 0.1) 75%);
    background-size: 200% 100%;
    animation: skeleton-shimmer 1.5s infinite;
}

@keyframes skeleton-shimmer {
    0% { background-position: 200% 0; }
    100% { background-position: -200% 0; }
}

.skeleton-card {
    border-radius: var(--border-radius, 12px);
    padding: 20px;
    background: white;
}

.skeleton-line {
    height: 16px;
    border-radius: 4px;
    margin-bottom: 10px;
}

.skeleton-line.short { width: 40%; }
.skeleton-line.medium { width: 70%; }
.skeleton-line.long { width: 90%; }

.progress-bar-container {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 3px;
    z-index: 10000;
    background: transparent;
}

.progress-bar {
    height: 100%;
    width: 0;
    background: linear-gradient(90deg, var(--primary-color, #E8B4B8), var(--secondary-color, #A8D5BA));
    transition: width var(--transition-duration-fast) var(--transition-timing);
    box-shadow: 0 0 10px rgba(232, 180, 184, 0.5);
}

.progress-bar.indeterminate {
    animation: progress-indeterminate 1.5s infinite linear;
    width: 30% !important;
}

@keyframes progress-indeterminate {
    0% { transform: translateX(-100%); }
    100% { transform: translateX(400%); }
}

@media (prefers-reduced-motion: reduce) {
    .page-slide-enter,
    .page-slide-leave,
    .page-fade-enter,
    .page-fade-leave,
    .page-zoom-enter,
    .page-zoom-leave,
    .page-flip-enter,
    .page-flip-leave,
    .page-transition-overlay .transition-spinner,
    .skeleton-loading,
    .progress-bar.indeterminate {
        animation: none !important;
    }
    
    .page-transition-overlay,
    .content-frame-wrapper .frame-loader,
    .nav-link-transition::after,
    .progress-bar {
        transition: none !important;
    }
    
    .page-slide-enter,
    .page-fade-enter,
    .page-zoom-enter,
    .page-flip-enter {
        opacity: 1;
        transform: none;
    }
}

@media (max-width: 768px) {
    .page-slide-enter {
        animation: pageSlideEnterMobile var(--transition-duration-normal) var(--transition-timing-smooth) forwards;
    }
    
    .page-slide-leave {
        animation: pageSlideLeaveMobile var(--transition-duration-normal) var(--transition-timing-smooth) forwards;
    }
    
    @keyframes pageSlideEnterMobile {
        from {
            opacity: 0;
            transform: translateY(20px);
        }
        to {
            opacity: 1;
            transform: translateY(0);
        }
    }
    
    @keyframes pageSlideLeaveMobile {
        from {
            opacity: 1;
            transform: translateY(0);
        }
        to {
            opacity: 0;
            transform: translateY(-20px);
        }
    }
}