.banner-container {
    height: 700px;
}

.banner-container img {
    height: 550px;
    width: 100%;
    object-fit: cover;
}

.image-course {
    position: relative;
    overflow: hidden;
}

.approved-badge {
    position: absolute;
    top: 30px;
    left: -50px;
    background-color: #008dc0;
    color: white;
    transform: rotate(-45deg);
    padding: 5px 45px;
    font-weight: bold;
    font-size: 16px;
    z-index: 10;
}

.course_info {
    color: #000000;
    font-size: 18px;
    letter-spacing: 0.5px;
}

h2.course-title {
    font-weight: 700;
}

.detail-container {
    font-weight: 400;
    font-size: 18px;
    color: #000;
}

.course_info span {
    font-weight: 700;
    font-family: var(--font-nunito);
}

.course-info-title {
    font-weight: 700;
    font-size: 20px;
}

.format-buttons {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
}

.format-btn {
    padding: 10px 25px;
    border: 1px solid #00455e;
    border-radius: 12px;
    color: #5e6368;
}

.format-btn.active {
    background: var(--primary-color);
    color: white;
}

.format-btn:hover {
    box-shadow: 0 0 0 1px var(--primary-color);
    /* tạo cảm giác viền dày lên */
}

.price {
    color: #f7931e;
    font-size: 30px;
    font-weight: 700;
}

.enroll-btn,
.btn-upgrade {
    padding: 10px 25px;
    border: 1px solid var(--primary-color);
    border-radius: 12px;
    background-color: var(--primary-color);
    color: #fff;
}

.enroll-btn:hover,
.btn-upgrade:hover {
    color: #fff;
}

.mejs__container,
.mejs__mediaelement,
video {
    border-radius: 20px !important;
    overflow: hidden !important;
    height: 330px;
    width: auto;
    max-width: 600px;
    aspect-ratio: 16/9;
}

.expert-btn {
    padding: 10px 25px;
    border: 1px solid var(--primary-color);
    border-radius: 20px;
    color: var(--primary-color);
}

.expert-btn:hover {
    color: #fff;
    background-color: var(--primary-color);
}

@media (max-width: 767.98px) {
    .banner-container {
        height: auto;
    }

    .banner-container img {
        height: auto;
    }
}