/* Reset and base styles */

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

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background-color: #f4f4f4;
    color: #333;
    line-height: 1.6;
}

header {
    background-color: #2c3e50;
    color: #fff;
    padding: 20px;
    text-align: center;
}

header h1 {
    margin-bottom: 10px;
}

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

section {
    margin-bottom: 40px;
}

section h2 {
    border-bottom: 2px solid #3498db;
    padding-bottom: 10px;
    margin-bottom: 20px;
    color: #2c3e50;
}

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

.card {
    background-color: #fff;
    border-radius: 8px;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    overflow: hidden;
    transition: transform 0.3s ease;
}

.card:hover {
    transform: translateY(-5px);
}

.card h3 {
    padding: 15px;
    background-color: #ecf0f1;
    font-size: 1.1em;
}

.card iframe {
    width: 100%;
    border: none;
}


/* Responsive design */

@media (max-width: 768px) {
    .grid {
        grid-template-columns: 1fr;
    }
    main {
        padding: 0 10px;
    }
}

.card.green {
    background-color: #d4edda;
    border-color: #c3e6cb;
}

.card.red {
    background-color: #f8d7da;
    border-color: #f5c6cb;
}