.course-container {
    max-width: 800px;
    margin: 0 auto;
    padding: 0 20px;
}

.course-container .header1 {
    display: -webkit-box;
    display: -ms-flexbox;
    display: flex;
    -webkit-box-orient: vertical;
    -webkit-box-direction: normal;
    -ms-flex-direction: column;
    flex-direction: column;
    -webkit-box-align: center;
    -ms-flex-align: center;
    align-items: center;
    text-align: center;
    margin-bottom: 2rem;
}

.course-container .header1 h1 {
    font-size: 28px;
    color: #1e293b;
    margin-bottom: 10px;
}

.course-container .header1 p {
    font-size: 18px;
    color: #2563eb;
    font-weight: 500;
}

.section {
    background: white;
    border-radius: 12px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.05);
    padding: 25px;
    margin-bottom: 30px;
}

.section-title {
    display: flex;
    align-items: center;
    margin-bottom: 20px;
    font-size: 20px;
    font-weight: 700;
    color: #1e293b;
}

.section-title svg {
    margin-right: 10px;
}

.highlights {
    display: grid;
    grid-template-columns: 1fr;
    gap: 15px;
}

.course-header {
    background: linear-gradient(to right, #fff1f2, #fce7f3);
    border-radius: 16px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
    padding: 24px;
    max-width: 800px;
    width: 100%;
    margin-bottom: 2rem;
}

.header-content {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

@media (min-width: 768px) {
    .header-content {
        flex-direction: row;
        justify-content: space-between;
        align-items: center;
    }
}

.title-section {
    display: flex;
    align-items: center;
    gap: 12px;
}

.discount-tag {
    background: linear-gradient(to bottom right, #f43f5e, #ec4899);
    color: white;
    padding: 8px 16px;
    border-radius: 8px;
    font-weight: bold;
    font-size: 16px;
}

.course-title {
    font-size: 24px;
    font-weight: bold;
    color: #1f2937;
    margin: 0;
}

.course-title span {
    color: #be123c;
}

.price-section {
    display: flex;
    align-items: center;
    gap: 16px;
}

.price-box {
    background: white;
    padding: 8px 16px;
    border-radius: 8px;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.05);
    display: flex;
    align-items: baseline;
    gap: 4px;
}

.current-price {
    font-size: 24px;
    font-weight: bold;
    color: #be123c;
}

.original-price {
    color: #9ca3af;
    text-decoration: line-through;
    font-size: 14px;
}

.price-unit {
    color: #9ca3af;
    font-size: 14px;
}

.enroll-btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: linear-gradient(to right, #f43f5e, #ec4899);
    color: white;
    padding: 12px 24px;
    border-radius: 8px;
    text-decoration: none;
    font-weight: 500;
    transition: all 0.3s ease;
    box-shadow: 0 2px 5px rgba(0, 0, 0, 0.1);
}

.enroll-btn:hover {
    background: linear-gradient(to right, #dc2626, #db2777);
    transform: translateY(-1px);
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.15);
}

@media (min-width: 640px) {
    .highlights {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (min-width: 768px) {
    .highlights {
        grid-template-columns: repeat(3, 1fr);
    }
}

.highlight-item {
    background: #f8fafc;
    border-radius: 8px;
    padding: 15px;
    display: flex;
}

.highlight-item svg {
    margin-right: 10px;
    flex-shrink: 0;
}

.highlight-content h3 {
    font-size: 16px;
    font-weight: 600;
    margin-bottom: 5px;
}

.highlight-content p {
    font-size: 14px;
    color: #64748b;
}

.chapter {
    margin-bottom: 25px;
}

.chapter-title {
    font-size: 18px;
    font-weight: 600;
    color: #1e293b;
    margin-bottom: 15px;
    padding-bottom: 10px;
    border-bottom: 1px solid #e2e8f0;
}

.chapter-item {
    display: flex;
    align-items: flex-start;
    margin-bottom: 10px;
    font-size: 15px;
}

.testimonials {
    display: grid;
    grid-template-columns: 1fr;
    gap: 15px;
    font-size: 14px;
}

@media (min-width: 640px) {
    .testimonials {
        grid-template-columns: repeat(2, 1fr);
    }
}

.testimonial {
    border: 1px solid #e2e8f0;
    border-radius: 8px;
    padding: 15px;
}

.rating {
    color: #f59e0b;
    margin-bottom: 10px;
    font-size: 18px;
}

.testimonial-content {
    font-style: italic;
    color: #475569;
    margin-bottom: 10px;
}

.testimonial-author {
    font-size: 14px;
    color: #64748b;
}

.instructor {
    background: linear-gradient(to right, #3b82f6, #8b5cf6);
    color: white;
    padding: 20px;
    border-radius: 8px;
}

.instructor h2 {
    margin-bottom: 15px;
    font-size: 20px;
}

.instructor p {
    margin-bottom: 10px;
    opacity: 0.9;
    font-size: 14px;
}