/* View Transitions CSS */

/* Prevent white flash - set dark background on transition layer */
::view-transition {
    background: #0a0a0a;
}

/* Cross-fade transition for root - avoid white flash */
::view-transition-old(root),
::view-transition-new(root) {
    animation-duration: 0.5s;
    animation-timing-function: cubic-bezier(0.4, 0, 0.2, 1);
    /* Ensure both are visible during transition */
    overflow: hidden;
}

/* Cross-fade: old fades out while new fades in simultaneously */
::view-transition-old(root) {
    animation-name: cross-fade-out;
    /* Keep old view on top during transition */
    z-index: 2;
}

::view-transition-new(root) {
    animation-name: cross-fade-in;
    z-index: 1;
}

@keyframes cross-fade-out {
    from {
        opacity: 1;
    }
    to {
        opacity: 0;
    }
}

@keyframes cross-fade-in {
    from {
        opacity: 0;
    }
    to {
        opacity: 1;
    }
}

/* Background image transition - cross-fade between images */
.page-background {
    view-transition-name: page-bg;
}

.fake3d-container {
    view-transition-name: page-bg;
}

::view-transition-old(page-bg),
::view-transition-new(page-bg) {
    animation-duration: 0.6s;
    animation-timing-function: cubic-bezier(0.4, 0, 0.2, 1);
    /* Stack both images for smooth cross-fade */
    overflow: hidden;
}

::view-transition-old(page-bg) {
    animation-name: bg-cross-fade-out;
    z-index: 2;
}

::view-transition-new(page-bg) {
    animation-name: bg-cross-fade-in;
    z-index: 1;
}

@keyframes bg-cross-fade-out {
    from {
        opacity: 1;
    }
    to {
        opacity: 0;
    }
}

@keyframes bg-cross-fade-in {
    from {
        opacity: 0;
    }
    to {
        opacity: 1;
    }
}

/* Content card transition */
.content-card {
    view-transition-name: content;
}

::view-transition-old(content),
::view-transition-new(content) {
    animation-duration: 0.5s;
    animation-timing-function: cubic-bezier(0.4, 0, 0.2, 1);
}

::view-transition-old(content) {
    animation-name: content-out;
}

::view-transition-new(content) {
    animation-name: content-in;
}

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

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

/* Navigation transition */
.page-nav {
    view-transition-name: nav;
}

::view-transition-old(nav),
::view-transition-new(nav) {
    animation-duration: 0.3s;
}

::view-transition-old(nav) {
    animation-name: nav-out;
}

::view-transition-new(nav) {
    animation-name: nav-in;
}

@keyframes nav-out {
    from { opacity: 1; }
    to { opacity: 0; }
}

@keyframes nav-in {
    from { opacity: 0; }
    to { opacity: 1; }
}

/* Bottom navigation transition */
.page-nav-bottom {
    view-transition-name: nav-bottom;
}

::view-transition-old(nav-bottom),
::view-transition-new(nav-bottom) {
    animation-duration: 0.3s;
}

::view-transition-old(nav-bottom) {
    animation-name: nav-bottom-out;
}

::view-transition-new(nav-bottom) {
    animation-name: nav-bottom-in;
}

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

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

/* Menu page transitions */
.menu-container {
    view-transition-name: menu;
}

::view-transition-old(menu),
::view-transition-new(menu) {
    animation-duration: 0.5s;
    animation-timing-function: cubic-bezier(0.4, 0, 0.2, 1);
}

::view-transition-old(menu) {
    animation-name: menu-out;
}

::view-transition-new(menu) {
    animation-name: menu-in;
}

@keyframes menu-out {
    from {
        opacity: 1;
        transform: scale(1);
    }
    to {
        opacity: 0;
        transform: scale(0.95);
    }
}

@keyframes menu-in {
    from {
        opacity: 0;
        transform: scale(0.95);
    }
    to {
        opacity: 1;
        transform: scale(1);
    }
}

/* Loading state styles */
.page-loading {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: #0a0a0a;
    z-index: 9999;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: opacity 0.4s ease-out;
}

.page-loading.loaded {
    opacity: 0;
    pointer-events: none;
}

.page-loading-spinner {
    width: 40px;
    height: 40px;
    border: 2px solid rgba(255, 255, 255, 0.1);
    border-top-color: #c9a962;
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

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

/* Fallback for browsers without View Transitions API */
@supports not (view-transition-name: none) {
    .page-view,
    .menu-page {
        animation: fadeIn 0.4s ease-out;
    }
}