/* Elegant Beta Design - Clean & Straightforward */

:root {
    /* Simple Color Palette */
    --primary-color: #10b981;
    --primary-light: #34d399;
    --primary-dark: #059669;
    
    /* Clean Neutrals */
    --bg-primary: #ffffff;
    --bg-secondary: #fafafa;
    --bg-tertiary: #f5f5f5;
    --text-primary: #2c3e50;
    --text-secondary: #7f8c8d;
    --text-muted: #95a5a6;
    --border-color: #e8e8e8;
    
    /* Dark Theme */
    --dark-bg-primary: #1a1a1a;
    --dark-bg-secondary: #2d2d2d;
    --dark-bg-tertiary: #404040;
    --dark-text-primary: #ffffff;
    --dark-text-secondary: #b0b0b0;
    --dark-text-muted: #888888;
    --dark-border-color: #404040;
    
    /* Typography */
    --font-primary: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    
    /* Simple Spacing */
    --space-xs: 0.25rem;
    --space-sm: 0.5rem;
    --space-md: 1rem;
    --space-lg: 1.5rem;
    --space-xl: 2rem;
    --space-2xl: 3rem;
    
    /* Clean Borders & Shadows */
    --border-radius: 12px;
    --border-radius-sm: 8px;
    --shadow-subtle: 0 1px 3px rgba(0, 0, 0, 0.1);
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.1);
    --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.1);
    
    /* Simple Transitions */
    --transition: 0.2s ease;
}

/* Dark Theme Variables */
[data-theme="dark"] {
    --bg-primary: var(--dark-bg-primary);
    --bg-secondary: var(--dark-bg-secondary);
    --bg-tertiary: var(--dark-bg-tertiary);
    --text-primary: var(--dark-text-primary);
    --text-secondary: var(--dark-text-secondary);
    --text-muted: var(--dark-text-muted);
    --border-color: var(--dark-border-color);
}

/* Utility Classes */
.hidden {
    display: none !important;
}

/* Base Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: var(--font-primary);
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    transition: background-color var(--transition), color var(--transition);
}

/* Clean Container */
.container {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* Simple Header */
.header {
    background: var(--bg-primary);
    border-bottom: 1px solid var(--border-color);
    padding: var(--space-lg) 0;
    position: sticky;
    top: 0;
    z-index: 100;
}

.header-content {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--space-xl);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-size: 2rem;
    font-weight: 700;
    color: var(--primary-color);
    text-decoration: none;
    transition: color var(--transition);
}

.logo:hover {
    color: var(--primary-dark);
}

.header-actions {
    display: flex;
    gap: var(--space-md);
    align-items: center;
}

/* Simple Button System */
.btn {
    display: inline-flex;
    align-items: center;
    gap: var(--space-sm);
    padding: var(--space-sm) var(--space-md);
    border: none;
    border-radius: var(--border-radius-sm);
    font-family: var(--font-primary);
    font-size: 0.875rem;
    font-weight: 500;
    cursor: pointer;
    transition: all var(--transition);
    text-decoration: none;
}

.btn:focus {
    outline: 2px solid var(--primary-color);
    outline-offset: 2px;
}

.btn-primary {
    background: var(--primary-color);
    color: white;
}

.btn-primary:hover {
    background: var(--primary-dark);
}

.btn-secondary {
    background: var(--bg-secondary);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
}

.btn-secondary:hover {
    background: var(--bg-tertiary);
}

.btn-ghost {
    background: transparent;
    color: var(--text-secondary);
}

.btn-ghost:hover {
    background: var(--bg-secondary);
    color: var(--text-primary);
}

.btn-icon {
    background: var(--bg-secondary);
    color: var(--text-secondary);
    width: 40px;
    height: 40px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 0;
}

.btn-icon:hover {
    background: var(--primary-color);
    color: white;
}

.btn-large {
    padding: var(--space-md) var(--space-xl);
    font-size: 1rem;
    font-weight: 600;
}

/* Main Content */
.main {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: var(--space-2xl) var(--space-xl);
    max-width: 1200px;
    margin: 0 auto;
    width: 100%;
}

/* Clean Kitten Container */
.kitten-container {
    position: relative;
    width: 100%;
    max-width: 600px;
    margin-bottom: var(--space-xl);
    border-radius: var(--border-radius);
    overflow: hidden;
    box-shadow: var(--shadow-md);
    background: var(--bg-secondary);
}

.kitten-image {
    width: 100%;
    height: auto;
    display: block;
}

.loading {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    color: var(--text-muted);
    font-size: 1rem;
    z-index: 10;
}

/* Simple Image Overlay */
.image-overlay {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    background: linear-gradient(transparent, rgba(0, 0, 0, 0.7));
    padding: var(--space-lg);
    display: flex;
    justify-content: space-between;
    align-items: flex-end;
    opacity: 0;
    transition: opacity var(--transition);
}

.kitten-container:hover .image-overlay {
    opacity: 1;
}

.image-actions {
    display: flex;
    gap: var(--space-sm);
}

.image-info {
    flex: 1;
    text-align: right;
    margin-left: var(--space-lg);
}

/* Simple Stats Below Image */
.stats-simple {
    width: 100%;
    max-width: 600px;
    margin-bottom: var(--space-xl);
    text-align: center;
}

.stats-simple-content {
    display: flex;
    justify-content: center;
    gap: var(--space-xl);
    margin-bottom: var(--space-md);
}

.stat-simple {
    text-align: center;
}

.stat-simple-value {
    display: block;
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--primary-color);
    line-height: 1.2;
}

.stat-simple-label {
    font-size: 0.75rem;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    font-weight: 500;
}

/* Simple Progress Bar */
.progress-simple {
    height: 6px;
    background: var(--bg-tertiary);
    border-radius: 3px;
    overflow: hidden;
    margin-bottom: var(--space-sm);
}

.progress-simple-fill {
    height: 100%;
    background: var(--primary-color);
    border-radius: 3px;
    transition: width 0.3s ease;
}

.progress-simple-text {
    font-size: 0.75rem;
    color: var(--text-muted);
}

/* Action Container */
.action-container {
    display: flex;
    justify-content: center;
}

/* Photographer Credit */
.photographer-credit {
    color: rgba(255, 255, 255, 0.9);
    font-size: 0.875rem;
}

.photographer-credit a {
    color: rgba(255, 255, 255, 0.9);
    text-decoration: none;
    border-bottom: 1px solid rgba(255, 255, 255, 0.3);
    transition: all var(--transition);
}

.photographer-credit a:hover {
    color: white;
    border-bottom-color: white;
}

/* Simple Footer */
.footer {
    background: var(--bg-secondary);
    border-top: 1px solid var(--border-color);
    padding: var(--space-2xl) 0 var(--space-xl);
    text-align: center;
}

.footer-content {
    max-width: 800px;
    margin: 0 auto;
    padding: 0 var(--space-xl);
}

.footer-description {
    margin-bottom: var(--space-xl);
}

.footer-title {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: var(--space-md);
    line-height: 1.3;
}

.footer-text {
    color: var(--text-secondary);
    font-size: 1rem;
    line-height: 1.6;
    max-width: 600px;
    margin: 0 auto;
}

.footer-disclaimer {
    color: var(--text-muted);
    font-size: 0.875rem;
    font-style: italic;
}

/* Simple Modals */
.modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    opacity: 1;
    transition: opacity var(--transition);
}

.modal.hidden {
    opacity: 0;
    pointer-events: none;
}

.modal-content {
    background: var(--bg-primary);
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-md);
    max-width: 90vw;
    max-height: 90vh;
    overflow: hidden;
    border: 1px solid var(--border-color);
}

.modal-header {
    padding: var(--space-xl);
    border-bottom: 1px solid var(--border-color);
    display: flex;
    justify-content: space-between;
    align-items: center;
    background: var(--bg-secondary);
}

.modal-header h2 {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--text-primary);
}

.modal-close {
    background: none;
    border: none;
    font-size: 1.5rem;
    color: var(--text-muted);
    cursor: pointer;
    padding: var(--space-sm);
    border-radius: var(--border-radius-sm);
    transition: all var(--transition);
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.modal-close:hover {
    background: var(--bg-tertiary);
    color: var(--text-primary);
}

.modal-body {
    padding: var(--space-xl);
    max-height: 60vh;
    overflow-y: auto;
}

/* Simple Grid Layouts */
.favorites-grid, .achievements-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: var(--space-lg);
}

.favorite-item, .achievement-item {
    background: var(--bg-secondary);
    border-radius: var(--border-radius-sm);
    overflow: hidden;
    border: 1px solid var(--border-color);
    transition: transform var(--transition);
}

.favorite-item:hover, .achievement-item:hover {
    transform: translateY(-2px);
}

.favorite-item img {
    width: 100%;
    height: 150px;
    object-fit: cover;
}

.favorite-item-info {
    padding: var(--space-md);
}

.photographer-info {
    font-size: 0.75rem;
    color: var(--text-secondary);
}

.achievement-item {
    padding: var(--space-lg);
    text-align: center;
}

.achievement-item.unlocked {
    background: var(--bg-primary);
    border-color: var(--primary-color);
}

.achievement-icon {
    font-size: 2rem;
    margin-bottom: var(--space-md);
    opacity: 0.3;
}

.achievement-item.unlocked .achievement-icon {
    opacity: 1;
}

.achievement-name {
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: var(--space-sm);
}

.achievement-description {
    font-size: 0.875rem;
    color: var(--text-secondary);
    line-height: 1.4;
}

/* No Content State */
.no-content {
    text-align: center;
    padding: var(--space-2xl);
    color: var(--text-secondary);
}

/* Theme Toggle */
.theme-icon {
    font-size: 1.25rem;
}

/* Fullscreen Modal */
.fullscreen-content {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    background: rgba(0, 0, 0, 0.95);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-direction: column;
    z-index: 2000;
}

.fullscreen-close {
    position: absolute;
    top: 2rem;
    right: 2rem;
    background: rgba(255, 255, 255, 0.1);
    border: 1px solid rgba(255, 255, 255, 0.2);
    color: white;
    font-size: 2rem;
    width: 50px;
    height: 50px;
    border-radius: 50%;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all var(--transition);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
}

.fullscreen-close:hover {
    background: rgba(255, 255, 255, 0.2);
    border-color: rgba(255, 255, 255, 0.4);
    transform: scale(1.1);
}

.fullscreen-image {
    max-width: 90vw;
    max-height: 85vh;
    object-fit: contain;
    border-radius: var(--border-radius-sm);
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.5);
}

.fullscreen-actions {
    position: absolute;
    bottom: 2rem;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    gap: 1rem;
    background: rgba(0, 0, 0, 0.3);
    padding: 1rem;
    border-radius: 50px;
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
}

.fullscreen-btn {
    background: rgba(255, 255, 255, 0.1);
    border: 1px solid rgba(255, 255, 255, 0.2);
    color: white;
    width: 50px;
    height: 50px;
    border-radius: 50%;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.25rem;
    transition: all var(--transition);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
}

.fullscreen-btn:hover {
    background: rgba(255, 255, 255, 0.2);
    border-color: rgba(255, 255, 255, 0.4);
    transform: scale(1.1);
}

.fullscreen-btn:focus {
    outline: 2px solid rgba(255, 255, 255, 0.5);
    outline-offset: 2px;
}

.fullscreen-info {
    position: absolute;
    bottom: 2rem;
    left: 50%;
    transform: translateX(-50%);
    text-align: center;
}

.fullscreen-credit {
    color: rgba(255, 255, 255, 0.8);
    font-size: 0.875rem;
    background: rgba(0, 0, 0, 0.3);
    padding: 0.5rem 1rem;
    border-radius: 20px;
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
}

.fullscreen-credit a {
    color: rgba(255, 255, 255, 0.9);
    text-decoration: none;
    border-bottom: 1px solid rgba(255, 255, 255, 0.3);
    transition: all var(--transition);
}

.fullscreen-credit a:hover {
    color: white;
    border-bottom-color: white;
}

/* Responsive Design */
@media (max-width: 768px) {
    .header-content {
        padding: 0 var(--space-lg);
    }
    
    .logo {
        font-size: 1.75rem;
    }
    
    .main {
        padding: var(--space-xl) var(--space-lg);
    }
    
    .stats-simple-content {
        gap: var(--space-lg);
    }
    
    /* Hide button text on mobile, show only icons */
    .image-actions .btn span:last-child {
        display: none;
    }
    
    .image-actions .btn {
        min-width: 44px;
        padding: 0.75rem;
    }
    
    /* Add more space around photo credit */
    .photographer-credit {
        margin-top: 1rem;
        padding: 0.5rem 0;
    }
    
    .image-overlay {
        position: static;
        opacity: 1;
        background: var(--bg-secondary);
        padding: var(--space-lg);
    }
    
    .image-actions {
        justify-content: center;
        flex-wrap: wrap;
    }
    
    .image-info {
        text-align: center;
        margin: var(--space-md) 0 0 0;
    }
    
    .photographer-credit {
        color: var(--text-secondary);
    }
    
    .photographer-credit a {
        color: var(--text-secondary);
        border-bottom-color: var(--border-color);
    }
    
    .photographer-credit a:hover {
        color: var(--primary-color);
        border-bottom-color: var(--primary-color);
    }
    
    .footer-content {
        padding: 0 var(--space-lg);
    }
}

@media (max-width: 480px) {
    .header-content {
        padding: 0 var(--space-md);
    }
    
    .logo {
        font-size: 1.5rem;
    }
    
    .btn {
        padding: var(--space-xs) var(--space-sm);
        font-size: 0.8rem;
    }
    
    .btn-icon {
        width: 36px;
        height: 36px;
    }
    
    .stats-simple-content {
        gap: var(--space-md);
    }
    
    .stat-simple-value {
        font-size: 1.25rem;
    }
    
    .main {
        padding: var(--space-lg) var(--space-md);
    }
    
    .footer-content {
        padding: 0 var(--space-md);
    }
}

/* Accessibility */
@media (prefers-reduced-motion: reduce) {
    * {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

.btn:focus-visible,
.modal-close:focus-visible {
    outline: 2px solid var(--primary-color);
    outline-offset: 2px;
}