body {

.hero-box {
    background: linear-gradient(135deg, #75b79f, #9fd7c4);
    border-radius: 28px;
    color: #fff;
    box-shadow: 0 12px 30px rgba(64, 122, 101, 0.18);
}

.card-soft {
    border: 0;
    border-radius: 24px;
    box-shadow: 0 10px 30px rgba(16, 24, 40, 0.06);
}

.btn-soft {
    border-radius: 16px;
    padding: .75rem 1rem;
    font-weight: 600;
}

.lesson-thumb,
.video-player,
.embed-box iframe {
    width: 100%;
    border-radius: 24px;
}

.lesson-thumb {
    aspect-ratio: 16 / 9;
    object-fit: cover;
}

.lesson-thumb-placeholder {
    aspect-ratio: 16 / 9;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 24px 24px 0 0;
    background: linear-gradient(135deg, #dff3ea, #cde9f2);
    color: #315b4c;
    padding: 1rem;
    text-align: center;
    font-weight: 700;
}

.section-title {
    font-weight: 800;
    letter-spacing: -0.03em;
}

.text-soft {
    color: #5f6f75;
}

.nav-pills-soft .nav-link {
    border-radius: 999px;
}

.nav-pills-soft .nav-link.active {
    background-color: #198754;
}

@media (max-width: 576px) {
    .hero-box {
        border-radius: 24px;
    }

    .btn-soft {
        min-height: 48px;
    }
}