header {
    text-align: center;
    margin-bottom: 20px;
}

h1 {
    color: #333;
}

.filter {
    display: flex;
    justify-content: center;
}

.filter-button {
    background-color: #f4f4f4;
    border: 2px solid #ddd;
    border-radius: 20px; 
    padding: 10px 20px;
    margin: 0 5px;
    cursor: pointer;
    transition: background-color 0.3s, color 0.3s;
}

.filter-button:hover {
    background-color: #555; 
    color: #fff;
}

.resource-container {
    display: flex;
    flex-wrap: wrap;
    justify-content: space-around;
    padding: 20px;
}

.resource {
    background: white;
    border: 1px solid #ddd;
    margin: 10px;
    width: calc(33% - 20px);
    overflow: hidden;
    box-shadow: 2px 2px 5px rgba(0, 0, 0, 0.1);
}

.resource img {
    width: 100%;
    height: auto;
    max-height: 200px;
    object-fit: contain;
}

.resource h3 {
    padding: 0 10px;
    text-align: center;
    margin-left: 10px;
}

.resource p {
    padding: 5px 10px;
    margin-left: 20px;
    text-align: center;
}
.resource iframe {
    width: 100%;
    height: 315px;
}

@media (max-width: 768px) {
    .resource {
        width: calc(50% - 20px); 
    }
}