.hero-50 {
    background: linear-gradient(135deg,#0d1b2a,#1b263b);
    color: white;
    padding: 70px 30px;
    border-radius: 24px;
    margin-bottom: 50px;
    position: relative;
    overflow: hidden;
}

    .hero-50 h1 {
        font-size: 3rem;
        font-weight: 700;
    }

    .hero-50 p {
        font-size: 1.15rem;
        opacity: .9;
        max-width: 800px;
    }

.section-title {
    font-size: 2rem;
    font-weight: 700;
    margin-bottom: 30px;
    color: #1b263b;
}

.presentation-card {
    border: none;
    border-radius: 20px;
    overflow: hidden;
    transition: all .25s ease;
    background: white;
    box-shadow: 0 5px 20px rgba(0,0,0,.08);
    height: 100%;
}

    .presentation-card:hover {
        transform: translateY(-6px);
        box-shadow: 0 12px 30px rgba(0,0,0,.15);
    }

.card-top {
    background: #f8f9fa;
    padding: 30px;
    text-align: center;
}

    .card-top i {
        font-size: 64px;
    }

.card-body-custom {
    padding: 25px;
}

.speaker-name {
    font-size: 1.2rem;
    font-weight: 700;
    margin-bottom: 10px;
    color: #1b263b;
}

.presentation-desc {
    color: #6c757d;
    min-height: 50px;
}

.btn-custom {
    border-radius: 10px;
    padding: 10px 18px;
}

.event-info {
    background: #f8f9fa;
    border-left: 5px solid #0d6efd;
    padding: 20px;
    border-radius: 10px;
    margin-bottom: 40px;
}

.mini-card {
    background: white;
    border-radius: 16px;
    padding: 22px;
    text-align: center;
    box-shadow: 0 4px 18px rgba(0,0,0,.08);
    transition: .2s ease;
    height: 100%;
}

    .mini-card:hover {
        transform: translateY(-4px);
        box-shadow: 0 10px 24px rgba(0,0,0,.12);
    }

.pdf-icon i {
    font-size: 52px;
    color: #dc3545;
}

.mini-title {
    font-weight: 700;
    font-size: 1rem;
    margin-top: 15px;
}

.mini-subtitle {
    color: #6c757d;
    font-size: .9rem;
    min-height: 40px;
}



.video-thumb {
    position: relative;
    cursor: pointer;
}

    .video-thumb img {
        width: 100%;
        height: 170px;
        object-fit: cover;
    }

.play-button {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    color: white;
    font-size: 60px;
    text-shadow: 0 2px 10px rgba(0,0,0,.5);
}