:root {
    --primary-color: #4CAF50;
    --primary-dark: #388E3C;
    --secondary-color: #2196F3;
    --background: #f5f5f5;
    --card-background: #ffffff;
    --text-primary: #212121;
    --text-secondary: #757575;
    --border-radius: 12px;
    --shadow: 0 2px 8px rgba(0,0,0,0.1);
    --shadow-hover: 0 4px 16px rgba(0,0,0,0.15);
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    background: var(--background);
    color: var(--text-primary);
    line-height: 1.6;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

header {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-dark) 100%);
    color: white;
    padding: 2rem 1rem;
    text-align: center;
}

header h1 {
    font-size: 2rem;
    margin-bottom: 0.5rem;
}

header p {
    opacity: 0.9;
}

main {
    flex: 1;
    padding: 2rem 1rem;
    max-width: 1200px;
    width: 100%;
    margin: 0 auto;
}

.app-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 2rem;
}

.app-card {
    background: var(--card-background);
    border-radius: var(--border-radius);
    padding: 2rem;
    box-shadow: var(--shadow);
    transition: transform 0.2s, box-shadow 0.2s;
    text-align: center;
}

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

.app-card.coming-soon {
    opacity: 0.6;
}

.app-icon {
    font-size: 3rem;
    margin-bottom: 1rem;
}

.app-card h2 {
    color: var(--text-primary);
    margin-bottom: 1rem;
}

.app-card p {
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
}

.btn-primary {
    display: inline-block;
    background: var(--primary-color);
    color: white;
    padding: 0.75rem 2rem;
    border-radius: var(--border-radius);
    text-decoration: none;
    font-weight: 600;
    transition: background 0.2s;
}

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

.btn-secondary {
    display: inline-block;
    background: var(--secondary-color);
    color: white;
    padding: 0.75rem 2rem;
    border-radius: var(--border-radius);
    text-decoration: none;
    font-weight: 600;
    transition: background 0.2s;
}

.btn-secondary:hover {
    background: #1976D2;
}

footer {
    background: var(--text-primary);
    color: white;
    text-align: center;
    padding: 1rem;
    margin-top: auto;
}

/* Responsive */
@media (max-width: 768px) {
    header h1 {
        font-size: 1.5rem;
    }
    
    .app-grid {
        grid-template-columns: 1fr;
        gap: 1rem;
    }
    
    main {
        padding: 1rem;
    }
}