body {
    font-family: Arial, sans-serif;
    margin: 0;
    background: #f5f5f5;
    text-align: center;
}

/* Títulos */
h1 {
    margin-top: 40px;
    font-size: 32px;
}

h2 {
    margin-top: 10px;
    font-size: 24px;
    font-weight: normal;
}
h1, h2 {
    color: #000000; /* negro */
}

/* VIDEO PRINCIPAL */
.video-principal {
    width: 90%;
    max-width: 1200px;
    margin: 30px auto;
}

.video-principal iframe {
    width: 100%;
    height: 400px;
    border-radius: 12px;
    background: #000;
}

/* GRID DE VIDEOS */
.grid-videos {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 25px;
    width: 90%;
    margin: 40px auto;
}

/* Tarjeta individual */
.video-card {
    background: #ffffff;
    border-radius: 12px;
    padding: 10px;
    box-shadow: 0 4px 12px rgba(0,0,0,0.12);
    transition: transform 0.2s ease;
}

.video-card:hover {
    transform: scale(1.03);
}

/* Iframe dentro de tarjeta */
.video-card iframe {
    width: 100%;
    height: 200px;
    border-radius: 8px;
    border: none;
}