/* ===============================
   COURSE DETAIL PAGE (Client)
   Namespace: .course-detail-page
   =============================== */
.course-detail-page * {
    box-sizing: border-box;
}

.course-detail-page {
    background-color: #f8f9fb !important;
    color: #1c1d1f !important;
    font-family: 'Segoe UI', sans-serif !important;
}

    /* ===== HEADER ===== */
    .course-detail-page .course-header {
        background: #1c1d1f !important;
        color: #fff !important;
        padding: 40px 0 !important;
    }

        .course-detail-page .course-header h1 {
            font-size: 2rem !important;
            font-weight: 700 !important;
            margin-bottom: 10px !important;
        }

        .course-detail-page .course-header p {
            color: #d1d7dc !important;
            margin: 0 !important;
        }

    /* ===== SIDEBAR ===== */
    .course-detail-page .course-info-card {
        background: #fff !important;
        border-radius: 12px !important;
        box-shadow: 0 6px 16px rgba(0, 0, 0, 0.08) !important;
        overflow: hidden !important;
        position: sticky !important;
        top: 100px !important;
    }

        .course-detail-page .course-info-card img {
            width: 100% !important;
            height: 200px !important;
            object-fit: cover !important;
        }

        .course-detail-page .course-info-card .card-body {
            padding: 20px !important;
        }

        .course-detail-page .course-info-card .price {
            font-size: 1.6rem !important;
            font-weight: 700 !important;
            color: #2d3748 !important;
        }

    .course-detail-page .btn-enroll {
        background-color: #a435f0 !important;
        color: #fff !important;
        width: 100% !important;
        font-weight: 600 !important;
        padding: 10px 0 !important;
        border-radius: 6px !important;
        border: none !important;
        transition: background-color 0.2s ease !important;
    }

        .course-detail-page .btn-enroll:hover {
            background-color: #8710d8 !important;
        }

    .course-detail-page ul {
        margin: 0 !important;
        padding-left: 18px !important;
    }

    /* ===== CHAPTERS & LESSONS ===== */
    .course-detail-page .chapter {
        margin-bottom: 1.5rem !important;
        background: #fff !important;
        border-radius: 8px !important;
        border: 1px solid #e0e0e0 !important;
        overflow: hidden !important;
    }

    .course-detail-page .chapter-header {
        background-color: #f8fafc !important;
        padding: 12px 16px !important;
        font-weight: 600 !important;
    }

    .course-detail-page .lesson-item {
        padding: 10px 16px !important;
        border-top: 1px solid #eee !important;
        display: flex !important;
        justify-content: space-between !important;
        align-items: center !important;
    }

        .course-detail-page .lesson-item:hover {
            background-color: #f9fafb !important;
        }

    /* ===== RELATED COURSES ===== */
    .course-detail-page .related-title {
        margin-top: 60px !important;
        font-size: 1.4rem !important;
        font-weight: 700 !important;
    }

    .course-detail-page .related-card {
        border: none !important;
        border-radius: 12px !important;
        overflow: hidden !important;
        background: white !important;
        box-shadow: 0 4px 10px rgba(0, 0, 0, 0.05) !important;
        transition: all 0.25s ease !important;
    }

        .course-detail-page .related-card:hover {
            transform: translateY(-4px) !important;
            box-shadow: 0 8px 18px rgba(0, 0, 0, 0.1) !important;
        }

        .course-detail-page .related-card img {
            height: 160px !important;
            object-fit: cover !important;
        }

        .course-detail-page .related-card .card-body {
            padding: 15px !important;
        }

        .course-detail-page .related-card .card-title {
            font-weight: 600 !important;
            font-size: 1rem !important;
        }

/* ===== RESPONSIVE ===== */
@media (max-width: 992px) {
    .course-detail-page .course-info-card {
        position: static !important;
        margin-top: 30px !important;
    }

    .course-detail-page .course-header {
        text-align: center !important;
    }
}

@media (max-width: 576px) {
    .course-detail-page .course-header h1 {
        font-size: 1.5rem !important;
    }
}