.select-container {
    max-width: 900px;
    margin: auto;
    padding: 80px 20px;
    text-align: center;
}

.select-container h1 {
    font-size: 36px;
    margin-bottom: 10px;
}

.subtitle {
    color: #6b7280;
    margin-bottom: 60px;
}

.os-cards {
    display: flex;
    justify-content: center;
    gap: 40px;
    flex-wrap: wrap;
}

.os-card {
    width: 260px;
    padding: 40px 20px;
    background: white;
    border-radius: 20px;
    text-decoration: none;
    color: inherit;
    box-shadow: 0 25px 60px rgba(0,0,0,.15);
    transition: .2s;
}

.os-card i {
    font-size: 60px;
    margin-bottom: 15px;
}

.os-card.windows i {
    color: #2563eb;
}

.os-card.mac i {
    color: #111827;
}

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



/* ******************************* */

/* MAIN CONTAINER */
.intro-container {
    max-width: 1200px;
    margin: auto;
    padding: 70px 20px;
}

/* TITLE */
.intro-container h1 {
    text-align: center;
    font-size: 36px;
    margin-bottom: 10px;
}

.subtitle {
    text-align: center;
    color: #6b7280;
    margin-bottom: 60px;
}

/* VIDEO GRID */
.video-list {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 40px;
}

/* VIDEO CARD */
.video-card {
    background: white;
    padding: 25px;
    border-radius: 18px;
    box-shadow: 0 20px 50px rgba(0,0,0,.12);
    transition: .2s;
}

.video-card:hover {
    transform: translateY(-4px);
}

/* VIDEO TITLE */
.video-card h3 {
    font-size: 18px;
    margin-bottom: 15px;
}

/* VIDEO FRAME */
.video-frame {
    position: relative;
    width: 100%;
    padding-top: 56.25%;
    border-radius: 12px;
    overflow: hidden;
    margin-bottom: 15px;
}

.video-frame iframe {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    border: none;
}

/* DESCRIPTION */
.video-card p {
    font-size: 14px;
    color: #4b5563;
    line-height: 1.6;
}

.promotion{
    width: 100%;
    display: flex;
    justify-content: center;
    margin: 0 0 50px 0;
}

/* RESPONSIVE */
@media (max-width: 768px) {
    .intro-container {
        padding: 40px 15px;
    }

    .intro-container h1 {
        font-size: 28px;
    }
}