/* ===== APP STORE CSS ===== */

/* CSS Variables - Unified Design System */
:root {
    /* Primary Colors */
    --primary: #6366f1;
    --primary-dark: #4f46e5;
    --primary-light: #818cf8;
    --secondary: #8b5cf6;
    --secondary-dark: #7c3aed;
    
    /* Status Colors */
    --success: #10b981;
    --success-dark: #059669;
    --warning: #f59e0b;
    --warning-dark: #d97706;
    --danger: #ef4444;
    --danger-dark: #dc2626;
    --info: #3b82f6;
    --info-dark: #2563eb;
    
    /* Neutral Colors */
    --text: #1f2937;
    --text-light: #6b7280;
    --text-lighter: #9ca3af;
    --bg-1: #ffffff;
    --bg-2: #f9fafb;
    --bg-3: #f3f4f6;
    --bg-4: #e5e7eb;
    
    /* Borders */
    --border: #e5e7eb;
    --border-light: #f3f4f6;
    --border-dark: #d1d5db;
    
    /* Shadows */
    --shadow: 0 1px 3px 0 rgba(0, 0, 0, 0.1), 0 1px 2px 0 rgba(0, 0, 0, 0.06);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
    
    /* Border Radius */
    --radius: 12px;
    --radius-sm: 8px;
    --radius-lg: 16px;
    --radius-xl: 20px;
    
    /* Transitions */
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-fast: all 0.15s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: all 0.5s cubic-bezier(0.4, 0, 0.2, 1);
    
    /* Typography */
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --font-size-xs: 0.75rem;
    --font-size-sm: 0.875rem;
    --font-size-base: 1rem;
    --font-size-lg: 1.125rem;
    --font-size-xl: 1.25rem;
    --font-size-2xl: 1.5rem;
    --font-size-3xl: 1.875rem;
    --font-size-4xl: 2.25rem;
    
    /* Spacing */
    --space-1: 0.25rem;
    --space-2: 0.5rem;
    --space-3: 0.75rem;
    --space-4: 1rem;
    --space-5: 1.25rem;
    --space-6: 1.5rem;
    --space-8: 2rem;
    --space-10: 2.5rem;
    --space-12: 3rem;
    --space-16: 4rem;
    --space-20: 5rem;
}

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

body {
    font-family: var(--font-family);
    line-height: 1.6;
    color: var(--text);
    background: var(--bg-2);
    font-size: var(--font-size-base);
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* Header */
.header {
    background: var(--bg-1);
    border-bottom: 1px solid var(--border);
    position: sticky;
    top: 0;
    z-index: 100;
    box-shadow: var(--shadow);
}

.header-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 70px;
}

.header-left {
    display: flex;
    align-items: center;
    gap: 20px;
}

.logo {
    display: flex;
    align-items: center;
    gap: 8px;
    text-decoration: none;
    color: var(--primary);
    font-weight: 600;
    font-size: 1.1rem;
}

.logo i {
    font-size: 1.2rem;
}

.header-left h1 {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text);
}

.header-right {
    display: flex;
    align-items: center;
    gap: 20px;
}

.search-container {
    position: relative;
    display: flex;
    align-items: center;
}

.search-container i {
    position: absolute;
    left: 12px;
    color: var(--text-light);
    font-size: 0.9rem;
}

#searchInput {
    padding: 10px 12px 10px 40px;
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    background: var(--bg-2);
    color: var(--text);
    font-size: 0.9rem;
    width: 300px;
    transition: var(--transition);
}

#searchInput:focus {
    outline: none;
    border-color: var(--primary);
    background: var(--bg-1);
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.1);
}

.create-app-btn {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 10px 16px;
    background: var(--primary);
    color: var(--bg-1);
    text-decoration: none;
    border-radius: var(--radius-sm);
    font-weight: 500;
    font-size: 0.9rem;
    transition: var(--transition);
}

.create-app-btn:hover {
    background: var(--primary-dark);
    transform: translateY(-1px);
}

/* Main Content */
.main-content {
    padding: 40px 0;
}

/* Hero Section */
.hero-section {
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    border-radius: var(--radius-lg);
    padding: 60px 40px;
    margin-bottom: 40px;
    text-align: center;
    color: var(--bg-1);
}

.hero-content h2 {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 16px;
}

.hero-content p {
    font-size: 1.1rem;
    margin-bottom: 40px;
    opacity: 0.9;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

.hero-stats {
    display: flex;
    justify-content: center;
    gap: 60px;
}

.stat {
    text-align: center;
}

.stat-number {
    display: block;
    font-size: 2rem;
    font-weight: 700;
    margin-bottom: 8px;
}

.stat-label {
    font-size: 0.9rem;
    opacity: 0.8;
}

/* Filters Section */
.filters-section {
    background: var(--bg-1);
    border-radius: var(--radius);
    padding: 24px;
    margin-bottom: 30px;
    box-shadow: var(--shadow);
}

.filters-container {
    display: flex;
    align-items: center;
    gap: 20px;
    flex-wrap: wrap;
}

.filter-group {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.filter-group label {
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--text);
}

.filter-group select {
    padding: 8px 12px;
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    background: var(--bg-1);
    color: var(--text);
    font-size: 0.9rem;
    min-width: 150px;
    transition: var(--transition);
}

.filter-group select:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.1);
}

.clear-filters-btn {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 8px 16px;
    background: var(--bg-3);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    color: var(--text);
    font-size: 0.9rem;
    cursor: pointer;
    transition: var(--transition);
    margin-top: 20px;
}

.clear-filters-btn:hover {
    background: var(--border);
}

/* Apps Section */
.apps-section {
    background: var(--bg-1);
    border-radius: var(--radius);
    padding: 30px;
    box-shadow: var(--shadow);
}

.apps-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 30px;
}

.apps-header h3 {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--text);
}

.apps-count {
    font-size: 0.9rem;
    color: var(--text-light);
}

.apps-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 24px;
    margin-bottom: 30px;
}

/* App Card */
.app-card {
    background: var(--bg-1);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    overflow: hidden;
    transition: var(--transition);
    cursor: pointer;
}

.app-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
    border-color: var(--primary);
}

.app-image {
    width: 100%;
    height: 200px;
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    overflow: hidden;
}

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

.app-image .app-icon {
    width: 80px;
    height: 80px;
    background: var(--bg-1);
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2rem;
    color: var(--primary);
}

.app-content {
    padding: 20px;
}

.app-title {
    font-size: 1.2rem;
    font-weight: 600;
    color: var(--text);
    margin-bottom: 8px;
    line-height: 1.3;
}

.app-description {
    font-size: 0.9rem;
    color: var(--text-light);
    margin-bottom: 16px;
    line-height: 1.5;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.app-meta {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 16px;
}

.app-category {
    background: var(--bg-3);
    color: var(--text);
    padding: 4px 12px;
    border-radius: 20px;
    font-size: 0.8rem;
    font-weight: 500;
}

.app-date {
    font-size: 0.8rem;
    color: var(--text-light);
}

.app-actions {
    display: flex;
    gap: 12px;
}

.app-btn {
    flex: 1;
    padding: 10px 16px;
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    background: var(--bg-1);
    color: var(--text);
    text-decoration: none;
    text-align: center;
    font-size: 0.9rem;
    font-weight: 500;
    transition: var(--transition);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
}

.app-btn.primary {
    background: var(--primary);
    color: var(--bg-1);
    border-color: var(--primary);
}

.app-btn:hover {
    transform: translateY(-1px);
    box-shadow: var(--shadow);
}

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

/* Loading State */
.loading-state {
    text-align: center;
    padding: 60px 20px;
}

.loading-spinner {
    width: 40px;
    height: 40px;
    border: 4px solid var(--border);
    border-top: 4px solid var(--primary);
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin: 0 auto 20px;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

.loading-state p {
    color: var(--text-light);
    font-size: 1rem;
}

/* Empty State */
.empty-state {
    text-align: center;
    padding: 60px 20px;
}

.empty-state i {
    font-size: 3rem;
    color: var(--text-light);
    margin-bottom: 20px;
}

.empty-state h4 {
    font-size: 1.2rem;
    color: var(--text);
    margin-bottom: 12px;
}

.empty-state p {
    color: var(--text-light);
    font-size: 1rem;
}

/* Load More */
.load-more-container {
    text-align: center;
    margin-top: 30px;
}

.load-more-btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 12px 24px;
    background: var(--bg-1);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    color: var(--text);
    font-size: 1rem;
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition);
}

.load-more-btn:hover {
    background: var(--bg-2);
    border-color: var(--primary);
    color: var(--primary);
}

/* Footer */
.footer {
    background: var(--text);
    color: var(--bg-1);
    padding: 40px 0 20px;
    margin-top: 60px;
}

.footer-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 40px;
    margin-bottom: 30px;
}

.footer-section h4 {
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: 16px;
}

.footer-section p {
    color: rgba(255, 255, 255, 0.8);
    line-height: 1.6;
}

.footer-section ul {
    list-style: none;
}

.footer-section ul li {
    margin-bottom: 8px;
}

.footer-section ul li a {
    color: rgba(255, 255, 255, 0.8);
    text-decoration: none;
    transition: var(--transition);
}

.footer-section ul li a:hover {
    color: var(--bg-1);
}

.footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    padding-top: 20px;
    text-align: center;
}

.footer-bottom p {
    color: rgba(255, 255, 255, 0.6);
    font-size: 0.9rem;
}

/* Notification Container */
.notification-container {
    position: fixed;
    top: 20px;
    right: 20px;
    z-index: 1000;
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.notification {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 16px 20px;
    background: var(--bg-1);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    box-shadow: var(--shadow-lg);
    min-width: 300px;
    animation: slideIn 0.3s ease;
}

.notification.success {
    border-left: 4px solid var(--success);
}

.notification.error {
    border-left: 4px solid var(--danger);
}

.notification.warning {
    border-left: 4px solid var(--warning);
}

.notification.info {
    border-left: 4px solid var(--info);
}

@keyframes slideIn {
    from {
        transform: translateX(100%);
        opacity: 0;
    }
    to {
        transform: translateX(0);
        opacity: 1;
    }
}

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

/* Responsive Design */
@media (max-width: 768px) {
    .header-container {
        flex-direction: column;
        height: auto;
        padding: 20px;
        gap: 20px;
    }
    
    .header-right {
        width: 100%;
        justify-content: space-between;
    }
    
    #searchInput {
        width: 200px;
    }
    
    .hero-section {
        padding: 40px 20px;
    }
    
    .hero-content h2 {
        font-size: 2rem;
    }
    
    .hero-stats {
        flex-direction: column;
        gap: 30px;
    }
    
    .filters-container {
        flex-direction: column;
        align-items: stretch;
    }
    
    .filter-group select {
        width: 100%;
    }
    
    .apps-header {
        flex-direction: column;
        gap: 16px;
        text-align: center;
    }
    
    .apps-grid {
        grid-template-columns: 1fr;
    }
    
    .app-actions {
        flex-direction: column;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
        text-align: center;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 15px;
    }
    
    .hero-content h2 {
        font-size: 1.8rem;
    }
    
    .hero-content p {
        font-size: 1rem;
    }
    
    .apps-section {
        padding: 20px;
    }
    
    .app-content {
        padding: 16px;
    }
    
    .notification {
        min-width: 280px;
        margin: 0 10px;
    }
}