body {
    font-family: Arial, sans-serif;
    background-color: #f4f4f4;
    margin: 0;
    padding: 0;
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
    flex-direction: column;
}

h1 {
    color: #333;
    margin-bottom: 20px;
}

.tarjeton {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 20px;
    padding: 20px;
    background-color: #f4f4f4;
    border-radius: 10px;
    box-shadow: 0 0 10px rgba(0, 0, 0, 0.1);
}

.tarjeta {
    position: relative;
    background: #fff;
    border: 1px solid #ccc;
    border-radius: 10px;
    box-shadow: 0 0 10px rgba(0, 0, 0, 0.1);
    text-align: center;
    padding: 10px;
    cursor: pointer;
    transition: transform 0.2s, box-shadow 0.2s;
}

.tarjeta:hover {
    transform: scale(1.05);
    box-shadow: 0 0 15px rgba(0, 128, 0, 0.5);
}

.tarjeta img {
    width: 100%;
    height: 150px;
    border-radius: 10px 10px 0 0;
    object-fit: cover;
}

.tarjeta h3 {
    margin: 10px 0;
}

.check-mark {
    position: absolute;
    top: 10px;
    right: 10px;
    width: 30px;
    height: 30px;
    border-radius: 50%;
    background-color: #5cb85c;
    display: none;
    justify-content: center;
    align-items: center;
    pointer-events: none;
}

.tarjeta.selected .check-mark {
    display: flex;
}

.check-mark::after {
    content: '\2713'; /* Unicode character for check mark */
    color: white;
    font-size: 20px;
}

input[type="radio"] {
    display: none;
}

input[type="radio"]:checked + .tarjeta {
    border: 2px solid #5cb85c;
}

input[type="radio"]:checked + .tarjeta .check-mark {
    display: flex;
}

button {
    display: block;
    margin: 20px auto;
    padding: 10px 20px;
    background: #5cb85c;
    color: #fff;
    border: none;
    border-radius: 5px;
    cursor: pointer;
    transition: background 0.2s;
}

button:hover {
    background: #4cae4c;
}