:root {
    --primary-color: #3498db;
    --secondary-color: #2980b9;
    --text-color: #333;
    --light-gray: #f5f5f5;
    --medium-gray: #e0e0e0;
    --dark-gray: #888;
    --white: #fff;
    --shadow: 0 2px 5px rgba(0, 0, 0, 0.1);
    --border-radius: 8px;
}

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

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    line-height: 1.6;
    color: var(--text-color);
    background-color: var(--light-gray);
}

.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

header {
    background-color: var(--primary-color);
    color: var(--white);
    padding: 20px 0;
    box-shadow: var(--shadow);
}

header .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 20px;
}

h1 {
    font-size: 1.8rem;
}


main {
    padding: 30px 0;
}


.apps-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 20px;
    margin-top: 20px;
}

.app-card {
    background-color: var(--white);
    border-radius: var(--border-radius);
    overflow: hidden;
    box-shadow: var(--shadow);
    transition: transform 0.3s, box-shadow 0.3s;
}

.app-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
}

.app-logo {
    height: 160px;
    background-color: var(--medium-gray);
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}

.app-logo img {
    max-width: 100%;
    max-height: 100%;
    object-fit: contain;
}

.app-info {
    padding: 20px;
}

.app-name {
    font-size: 1.2rem;
    margin-bottom: 10px;
    color: var(--primary-color);
}

.app-description {
    color: var(--text-color);
    margin-bottom: 15px;
    font-size: 0.95rem;
}

.app-meta {
    display: flex;
    justify-content: space-between;
    align-items: center;
    color: var(--dark-gray);
    font-size: 0.85rem;
}

.app-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 5px;
    margin-top: 10px;
}

.app-tag {
    background-color: var(--light-gray);
    padding: 3px 8px;
    border-radius: 12px;
    font-size: 0.75rem;
}

.app-link {
    display: inline-block;
    margin-top: 15px;
    padding: 8px 15px;
    background-color: var(--primary-color);
    color: var(--white);
    text-decoration: none;
    border-radius: var(--border-radius);
    font-size: 0.9rem;
    transition: background-color 0.2s;
}

.app-link:hover {
    background-color: var(--secondary-color);
}

footer {
    background-color: var(--white);
    padding: 20px 0;
    text-align: center;
    color: var(--dark-gray);
    font-size: 0.9rem;
    border-top: 1px solid var(--medium-gray);
    margin-top: 30px;
}

.hidden {
    display: none;
}

#loading, #error {
    text-align: center;
    padding: 30px;
    font-size: 1.1rem;
    color: var(--dark-gray);
}

#error {
    color: #e74c3c;
}

/* Responsive adjustments */
@media (max-width: 768px) {
    header .container {
        flex-direction: column;
        align-items: stretch;
    }
    
    .search-container {
        max-width: 100%;
    }
    
    .filter-container {
        flex-direction: column;
        align-items: flex-start;
    }
    
    .apps-grid {
        grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
    }
}

@media (max-width: 480px) {
    .apps-grid {
        grid-template-columns: 1fr;
    }
    
    h1 {
        font-size: 1.5rem;
    }
}