/* 
 * Commons Swipe - Prototype
 * A prototype implementation for browsing Wikimedia Commons images
 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'CC Accidenz Commons', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    line-height: 1.6;
    background-color: #000;
    color: #fff;
    margin: 0;
    padding: 0;
}

.app-container {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    overflow: hidden;
    height: 100vh;
    width: 100vw;
}

.view {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    display: none;
    flex-direction: column;
    background-color: #000;
    overflow: hidden;
    height: 100vh;
    width: 100vw;
}

.view.active {
    display: flex;
}

.view.zooming {
    transform: scale(1.1);
    opacity: 0;
    transition: transform 0.3s ease-out, opacity 0.3s ease-out;
}

header {
    padding: 0.5rem 1rem;
    background-color: white;
    color: #2b6cb0;
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 3rem;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
}

h1 {
    font-family: 'CC Accidenz Commons', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    font-size: 1.1rem;
    margin: 0;
    font-weight: 500;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

h1::before {
    content: '';
    display: inline-block;
    width: 24px;
    height: 24px;
    background-image: url('https://upload.wikimedia.org/wikipedia/commons/4/4a/Commons-logo.svg');
    background-size: contain;
    background-repeat: no-repeat;
    background-position: center;
    filter: brightness(0) saturate(100%) invert(35%) sepia(50%) saturate(1000%) hue-rotate(190deg) brightness(90%) contrast(90%);
}

button {
    font-family: 'CC Accidenz Commons', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    background: none;
    border: none;
    color: #2b6cb0;
    padding: 0.5rem;
    cursor: pointer;
    font-size: 0.9rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    opacity: 0.9;
    transition: opacity 0.2s;
}

button:hover {
    opacity: 1;
}

button i {
    font-size: 1.1rem;
}

.image-container {
    flex: 1;
    overflow: hidden;
    position: relative;
    margin-top: 3rem;
    height: calc(100vh - 3rem);
    width: 100vw;
}

.image-feed {
    position: absolute;
    width: 100%;
    height: 100%;
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

.image-card {
    width: 100%;
    height: 100%;
    position: absolute;
    top: 0;
    left: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: #000;
    transition: transform 0.4s cubic-bezier(0.2, 0.8, 0.2, 1);
    transform: translateY(0);
    will-change: transform;
    z-index: 2;
    overflow: hidden;
}

.image-card img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    will-change: transform;
    opacity: 0;
}

.image-card.loaded img {
    opacity: 1;
}

.image-card img:hover {
    transform: scale(1.02);
}

.image-info {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    padding: 1rem;
    color: white;
    text-align: right;
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    background: linear-gradient(to top, rgba(0, 0, 0, 0.8), transparent);
    padding-bottom: max(1rem, env(safe-area-inset-bottom, 1rem));
    z-index: 2;
    height: 16rem;
    background-size: 100% 100%;
    background-position: bottom;
    padding-top: 0;
}

.image-info p {
    font-family: 'CC Accidenz Commons', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    margin: 0;
    text-shadow: 0 1px 2px rgba(0, 0, 0, 0.5);
}

.image-info a {
    font-family: 'CC Accidenz Commons', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    color: white;
    text-decoration: none;
    transition: opacity 0.2s;
}

.image-info a:hover {
    opacity: 0.8;
}

.info-button {
    font-size: 1.2rem;
    margin-top: 0.5rem;
    display: inline-block;
    padding: 0.5rem;
    color: rgba(255, 255, 255, 0.8);
    transition: opacity 0.2s;
}

.info-button:hover {
    opacity: 1;
    color: white;
}

.license-info {
    font-family: 'CC Accidenz Commons', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    font-size: 0.9rem;
    color: rgba(255, 255, 255, 0.7);
    margin: 0.5rem 0;
}

#categoriesView {
    display: none;
    flex-direction: column;
    background-color: #000;
    height: 100vh;
    margin-top: 3rem;
}

#categoriesView.active {
    display: flex;
}

.categories-container {
    flex: 1;
    overflow-y: auto;
    padding: 1rem;
    -webkit-overflow-scrolling: touch;
    height: calc(100vh - 3rem);
    width: 100vw;
}

.categories-list {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
    gap: 1rem;
    padding-bottom: 2rem;
}

.category-item {
    background-color: rgba(255, 255, 255, 0.1);
    padding: 1.5rem;
    border-radius: 12px;
    text-align: center;
    cursor: pointer;
    transition: all 0.3s ease;
    color: white;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.5rem;
    position: relative;
    overflow: hidden;
    font-family: 'CC Accidenz Commons', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
}

.category-item::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(45deg, rgba(43, 108, 176, 0.1), rgba(43, 108, 176, 0.2));
    opacity: 0;
    transition: opacity 0.3s ease;
}

.category-item:hover::before {
    opacity: 1;
}

.category-item.selected {
    background-color: rgba(43, 108, 176, 0.3);
    border: 2px solid #2b6cb0;
}

.category-item i {
    font-size: 2rem;
    margin-bottom: 0.5rem;
    color: #2b6cb0;
    opacity: 0.8;
    transition: transform 0.3s ease;
}

.category-item:hover i {
    transform: scale(1.1);
    opacity: 1;
}

.category-item span {
    font-family: 'CC Accidenz Commons', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    font-size: 0.9rem;
    font-weight: 500;
    color: white;
    text-transform: capitalize;
}

.category-item .count {
    font-family: 'CC Accidenz Commons', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    font-size: 0.8rem;
    color: rgba(255, 255, 255, 0.6);
    margin-top: 0.25rem;
}

/* Category icons based on category name */
.category-item[data-category*="Animals"] i { content: "\f6d3"; }
.category-item[data-category*="Architecture"] i { content: "\f54f"; }
.category-item[data-category*="Art"] i { content: "\f53f"; }
.category-item[data-category*="Astronomy"] i { content: "\f7a2"; }
.category-item[data-category*="Biology"] i { content: "\f7a4"; }
.category-item[data-category*="Buildings"] i { content: "\f54f"; }
.category-item[data-category*="Cities"] i { content: "\f64f"; }
.category-item[data-category*="Computers"] i { content: "\f109"; }
.category-item[data-category*="Culture"] i { content: "\f7a1"; }
.category-item[data-category*="Earth"] i { content: "\f7a2"; }
.category-item[data-category*="Education"] i { content: "\f19d"; }
.category-item[data-category*="Engineering"] i { content: "\f7a4"; }
.category-item[data-category*="Environment"] i { content: "\f7a2"; }
.category-item[data-category*="Events"] i { content: "\f073"; }
.category-item[data-category*="Food"] i { content: "\f2e7"; }
.category-item[data-category*="Geography"] i { content: "\f5a1"; }
.category-item[data-category*="History"] i { content: "\f1da"; }
.category-item[data-category*="Human_body"] i { content: "\f183"; }
.category-item[data-category*="Industry"] i { content: "\f275"; }
.category-item[data-category*="Landscapes"] i { content: "\f3fe"; }
.category-item[data-category*="Light"] i { content: "\f0eb"; }
.category-item[data-category*="Maps"] i { content: "\f5a1"; }
.category-item[data-category*="Mathematics"] i { content: "\f1ec"; }
.category-item[data-category*="Medicine"] i { content: "\f0fa"; }
.category-item[data-category*="Military"] i { content: "\f6e4"; }
.category-item[data-category*="Music"] i { content: "\f001"; }
.category-item[data-category*="Nature"] i { content: "\f1bb"; }
.category-item[data-category*="People"] i { content: "\f183"; }
.category-item[data-category*="Physics"] i { content: "\f7a4"; }
.category-item[data-category*="Plants"] i { content: "\f1bb"; }
.category-item[data-category*="Politics"] i { content: "\f0e3"; }
.category-item[data-category*="Religion"] i { content: "\f6d3"; }
.category-item[data-category*="Science"] i { content: "\f7a4"; }
.category-item[data-category*="Sports"] i { content: "\f44e"; }
.category-item[data-category*="Technology"] i { content: "\f109"; }
.category-item[data-category*="Transport"] i { content: "\f5b6"; }
.category-item[data-category*="Travel"] i { content: "\f5b6"; }
.category-item[data-category*="Weather"] i { content: "\f73d"; }
.category-item[data-category*="Wildlife"] i { content: "\f6d3"; }
.category-item[data-category*="World_Heritage_Sites"] i { content: "\f54f"; }
.category-item[data-category*="Zoology"] i { content: "\f6d3"; }

/* Loading indicator */
.loading {
    position: fixed;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1rem;
    color: white;
    font-size: 1rem;
}

.loading-spinner {
    width: 40px;
    height: 40px;
    border: 4px solid rgba(255, 255, 255, 0.1);
    border-radius: 50%;
    border-top-color: #2b6cb0;
    animation: spin 1s ease-in-out infinite;
}

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

/* Swipe indicators */
.swipe-indicator {
    position: absolute;
    width: 100%;
    height: 100%;
    display: flex;
    justify-content: center;
    align-items: center;
    pointer-events: none;
    opacity: 0;
    transition: opacity 0.3s;
}

.swipe-indicator.active {
    opacity: 1;
}

.swipe-up {
    top: 0;
    transform: translateY(-100%);
    background: linear-gradient(to bottom, rgba(0, 0, 0, 0.5), transparent);
}

.swipe-down {
    bottom: 0;
    transform: translateY(100%);
    background: linear-gradient(to top, rgba(0, 0, 0, 0.5), transparent);
}

.swipe-indicator i {
    font-size: 3rem;
    color: rgba(255, 255, 255, 0.5);
}

/* Keyboard navigation hint */
.keyboard-hint {
    position: absolute;
    bottom: 1rem;
    right: 1rem;
    background: rgba(0, 0, 0, 0.7);
    padding: 0.5rem;
    border-radius: 4px;
    font-size: 0.8rem;
    color: rgba(255, 255, 255, 0.7);
    display: none;
}

@media (min-width: 768px) {
    .keyboard-hint {
        display: block;
    }
}

.container {
    max-width: 800px;
    margin: 0 auto;
    padding: 2rem;
}

footer {
    text-align: center;
    margin-top: 2rem;
    color: #666;
}

.image-preview {
    position: absolute;
    width: 100%;
    height: 100%;
    top: 0;
    left: 0;
    background-color: #000;
    transform: translateY(100%);
    transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    pointer-events: none;
    z-index: 1;
    opacity: 0.3;
}

.image-preview img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.image-preview .image-info {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    padding: 2rem;
    color: white;
    text-align: right;
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    opacity: 0.7;
    height: 16rem;
    background: linear-gradient(to top, rgba(0, 0, 0, 0.8), transparent);
    background-size: 100% 100%;
    background-position: bottom;
    padding-top: 0;
}

.image-preview .image-info p {
    font-family: 'CC Accidenz Commons', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    margin: 0;
    text-shadow: 0 1px 2px rgba(0, 0, 0, 0.5);
}

.image-preview .image-info .license-info {
    font-family: 'CC Accidenz Commons', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    font-size: 0.8rem;
    color: rgba(255, 255, 255, 0.7);
}

.category-search {
    flex: 1;
    max-width: 400px;
    margin: 0 1rem;
    display: flex;
    gap: 0.5rem;
}

.category-search input {
    font-family: 'CC Accidenz Commons', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    flex: 1;
    padding: 0.5rem;
    border: 1px solid rgba(43, 108, 176, 0.2);
    border-radius: 4px;
    background-color: white;
    color: #2b6cb0;
    font-size: 0.9rem;
}

.category-search input::placeholder {
    font-family: 'CC Accidenz Commons', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    color: rgba(43, 108, 176, 0.5);
}

.category-search button {
    padding: 0.5rem;
    background-color: #2b6cb0;
    color: white;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    transition: background-color 0.2s;
}

.category-search button:hover {
    background-color: #2c5282;
}

.remove-category {
    position: absolute;
    top: 0.5rem;
    right: 0.5rem;
    background: none;
    border: none;
    color: rgba(255, 255, 255, 0.5);
    cursor: pointer;
    padding: 0.25rem;
    transition: color 0.2s;
}

.remove-category:hover {
    color: white;
}

/* Desktop specific styles */
@media (min-width: 768px) {
    .categories-container {
        scrollbar-width: thin;
        scrollbar-color: rgba(255, 255, 255, 0.2) transparent;
    }

    .categories-container::-webkit-scrollbar {
        width: 8px;
    }

    .categories-container::-webkit-scrollbar-track {
        background: transparent;
    }

    .categories-container::-webkit-scrollbar-thumb {
        background-color: rgba(255, 255, 255, 0.2);
        border-radius: 4px;
    }

    .categories-container::-webkit-scrollbar-thumb:hover {
        background-color: rgba(255, 255, 255, 0.3);
    }
}

.image-loading {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(90deg, #1a1a1a 0%, #2a2a2a 50%, #1a1a1a 100%);
    background-size: 200% 100%;
    animation: loading 1.5s infinite;
    z-index: 1;
}

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

.image-card img,
.image-preview img {
    opacity: 0;
    transition: opacity 0.3s ease-in;
}

.image-card.loaded img,
.image-preview.loaded img {
    opacity: 1;
}

.image-card.loaded .image-loading,
.image-preview.loaded .image-loading {
    display: none;
}

.image-card .info-link {
    position: fixed;
    top: 1.5rem;
    right: 1rem;
    color: white;
    z-index: 1000;
    text-decoration: none;
    width: 2rem;
    height: 2rem;
    display: flex;
    align-items: center;
    justify-content: center;
}

.image-card .info-link i {
    font-size: 1.2rem;
    text-shadow: 0 1px 2px rgba(0, 0, 0, 0.5);
}

.title-link {
    color: inherit;
    text-decoration: none;
}

.scroll-indicator {
    position: absolute;
    bottom: 0.5rem;
    left: 50%;
    transform: translateX(-50%);
    color: rgba(255, 255, 255, 0.7);
    font-size: 1.5rem;
    animation: bounce 2s 1;
    cursor: pointer;
    z-index: 10;
    transition: transform 0.3s ease;
}

.scroll-indicator:hover {
    color: rgba(255, 255, 255, 1);
    transform: translateX(-50%) scale(1.1);
}

@keyframes bounce {
    0%, 20%, 50%, 80%, 100% {
        transform: translateY(0) translateX(-50%);
    }
    40% {
        transform: translateY(-10px) translateX(-50%);
    }
    60% {
        transform: translateY(-5px) translateX(-50%);
    }
}

.close-button {
    background: none;
    border: none;
    color: #2b6cb0;
    padding: 0.5rem;
    cursor: pointer;
    font-size: 1.2rem;
    display: flex;
    align-items: center;
    justify-content: center;
    width: 2.5rem;
    height: 2.5rem;
    border-radius: 50%;
    transition: all 0.2s;
}

.close-button:hover {
    background-color: rgba(43, 108, 176, 0.1);
    transform: scale(1.1);
}

.close-button i {
    font-size: 1.2rem;
}

.filter-button {
    background: none;
    border: none;
    color: #2b6cb0;
    padding: 0.5rem;
    cursor: pointer;
    font-size: 0.9rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    opacity: 0.9;
    transition: all 0.2s;
    position: relative;
}

.filter-button.active {
    color: #4CAF50;
}

.filter-button.active::after {
    content: '1';
    position: absolute;
    top: -2px;
    right: -2px;
    background-color: #4CAF50;
    color: white;
    font-size: 0.6rem;
    width: 14px;
    height: 14px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 600;
}

@media (max-width: 767px) {
    .image-info {
        height: 12rem;
        padding-bottom: 4rem;
    }
    
    .image-preview .image-info {
        height: 12rem;
        padding-bottom: 4rem;
    }
    
    .scroll-indicator {
        bottom: 1.5rem;
    }
}

@media (min-width: 768px) {
    .image-info {
        padding-top: 8rem;
    }
    
    .image-preview .image-info {
        padding-top: 8rem;
    }
}

@media (max-width: 767px) {
    .app-container {
        height: 100dvh;
        width: 100vw;
    }
    
    .view {
        height: 100dvh;
        width: 100vw;
    }
    
    .image-container {
        height: calc(100dvh - 3rem);
    }
    
    .categories-container {
        height: calc(100dvh - 3rem);
    }
}

@supports (-webkit-touch-callout: none) {
    .app-container {
        height: -webkit-fill-available;
        min-height: -webkit-fill-available;
    }
    
    .view {
        height: -webkit-fill-available;
        min-height: -webkit-fill-available;
    }
    
    .image-container {
        height: calc(-webkit-fill-available - 3rem);
    }
    
    .categories-container {
        height: calc(-webkit-fill-available - 3rem);
    }
    
    .image-info {
        padding-bottom: max(4rem, env(safe-area-inset-bottom, 4rem));
    }
    
    .image-preview .image-info {
        padding-bottom: max(4rem, env(safe-area-inset-bottom, 4rem));
    }
}

@media (max-width: 767px) {
    .image-info {
        height: 12rem;
        padding-bottom: 4rem;
    }
    
    .image-preview .image-info {
        height: 12rem;
        padding-bottom: 4rem;
    }
    
    .scroll-indicator {
        bottom: 1.5rem;
    }
}

@media (min-width: 768px) {
    .image-info {
        padding-top: 8rem;
    }
    
    .image-preview .image-info {
        padding-top: 8rem;
    }
}