body {
        margin: 0;
        background: #fff;
        font-family: Arial, sans-serif;
    }

    .page-container {
        padding: 24px 40px;
    }

    .page-header h2 {
        font-size: 26px;
        margin-bottom: 8px;
    }

    .content-area {
        display: flex;
        gap: 32px;
        margin-top: 20px;
    }

    .sidebar {
        width: 220px;
    }

    .filter-box {
        margin-bottom: 20px;
    }

    .filter-box h4 {
        font-size: 16px;
        margin-bottom: 10px;
    }

    .filter-list li {
        list-style: none;
        margin-bottom: 6px;
    }

    .courses {
        flex: 1;
    }

    .course-top {
        display: flex;
        justify-content: flex-end;
        margin-bottom: 16px;
    }

    .course-grid {
        display: grid;
        grid-template-columns: repeat(3, 1fr);
        gap: 18px;
    }

    .course-card {
        border: 1px solid #ddd;
        border-radius: 12px;
        padding: 10px;
        background: #fff;
    }

    .course-thumb {
        width: 100%;
        height: 180px;
        /* Fixed height for uniformity */
        object-fit: cover;
        /* scaling without distortion */
        border-radius: 12px;
    }

    .course-meta {
        font-size: 12px;
        color: #777;
        margin: 6px 0;
    }

    .course-price {
        font-size: 16px;
        font-weight: bold;
    }

    .pagination {
        margin-top: 18px;
        display: flex;
        gap: 6px;
    }

    .pagination button {
        padding: 6px 10px;
        border: 1px solid #aaa;
        background: #fff;
        border-radius: 6px;
    }

    .pagination .active {
        background: #000;
        color: #fff;
    }

    .mentors-section,
    .featured-courses {
        margin: 40px 0;
    }

    .mentors-section h3,
    .featured-courses h3 {
        font-size: 22px;
        margin-bottom: 20px;
        font-weight: 600;
    }

    .mentor-grid {
        display: grid;
        grid-template-columns: repeat(5, 1fr);
        gap: 24px;
    }

    .mentor-card {
        background: #fff;
        border-radius: 12px;
        text-align: center;
        padding: 12px;
        box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
    }

    .mentor-card img {
        width: 100%;
        height: 150px;
        object-fit: cover;
        border-radius: 12px;
        margin-bottom: 10px;
    }

    .mentor-card h4 {
        font-size: 16px;
        margin: 6px 0 2px;
        font-weight: 600;
    }

    .mentor-card p {
        font-size: 14px;
        color: #666;
        margin-bottom: 6px;
    }

    .mentor-card span {
        font-size: 14px;
        display: block;
        color: #444;
    }

    .featured-grid {
        display: grid;
        grid-template-columns: repeat(4, 1fr);
        gap: 24px;
    }

    .featured-card {
        background: #fff;
        border-radius: 12px;
        padding: 12px;
        box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
    }

    .featured-card img {
        width: 100%;
        height: 150px;
        object-fit: cover;
        border-radius: 12px;
        margin-bottom: 10px;
    }

    .featured-card h4 {
        font-size: 16px;
        font-weight: 600;
        margin-bottom: 4px;
    }

    .featured-card span {
        font-size: 14px;
        color: #444;
        display: block;
        margin-bottom: 4px;
    }

    .featured-card strong {
        font-size: 16px;
        font-weight: 700;
        display: block;
        margin-top: 4px;
    }

    .footer {
        background: #1d1d2b;
        color: #ccc;
        padding: 40px;
        margin-top: 40px;
    }

    .footer-grid {
        display: flex;
        justify-content: space-between;
    }

    .footer-col h4 {
        color: #fff;
    }

    .social-icons {
        display: flex;
        gap: 8px;
        align-items: center;
    }

    .social-icons .header-icon {
        width: auto;
        height: auto;
        max-width: 150px;
        max-height: 150px;
        display: inline-block;
        object-fit: contain;
    }

    @media (max-width: 1200px) {
        .course-grid {
            grid-template-columns: repeat(2, 1fr);
        }

        .featured-grid {
            grid-template-columns: repeat(3, 1fr);
        }

        .mentor-grid {
            grid-template-columns: repeat(4, 1fr);
        }
    }

    @media (max-width: 992px) {
        .header {
            padding: 12px 20px;
            height: auto;
            gap: 12px;
        }

        .search-box input {
            width: 300px;
        }

        .course-grid {
            grid-template-columns: 1fr;
            gap: 16px;
        }

        .featured-grid {
            grid-template-columns: repeat(2, 1fr);
        }

        .mentor-grid {
            grid-template-columns: repeat(3, 1fr);
        }

        .sidebar {
            display: none;
        }

        .page-container {
            padding: 16px;
        }
    }

    @media (max-width: 768px) {
        .header {
            flex-direction: column;
            align-items: stretch;
        }

        .header-left {
            display: flex;
            justify-content: space-between;
            align-items: center;
            gap: 8px;
        }

        .header-center {
            order: 3;
            width: 100%;
            display: flex;
            justify-content: center;
        }

        .search-box {
            display: none;
        }

        .header-right {
            width: 100%;
            display: flex;
            justify-content: flex-end;
            gap: 8px;
        }

        .content-area {
            gap: 12px;
        }

        .course-grid {
            grid-template-columns: 1fr;
        }

        .mentor-grid {
            grid-template-columns: repeat(2, 1fr);
        }

        .featured-grid {
            grid-template-columns: 1fr;
        }

        .footer-grid {
            flex-direction: column;
            gap: 20px;
        }

        .footer {
            padding: 24px;
        }
    }

    @media (max-width: 480px) {
        .brand {
            font-size: 18px;
        }

        .logo-img {
            height: 28px;
        }

        .avatar {
            width: 28px;
            height: 28px;
            font-size: 12px;
        }

        .page-container {
            padding: 12px;
        }

        .course-card {
            padding: 12px;
        }

        .mentor-card img,
        .featured-card img {
            height: 120px;
        }
    }

    .course-card {
        position: relative;
        padding-bottom: 50px;
        /* Space for button */
    }

    .add-cart-btn {
        width: 90%;
        margin: 0 5%;
        padding: 8px;
        background: #0b0f2b;
        color: #fff;
        border: none;
        border-radius: 6px;
        cursor: pointer;
        margin-top: 10px;
        opacity: 0;
        transform: translateY(10px);
        transition: all 0.2s;
        position: absolute;
        bottom: 15px;
        left: 0;
    }

    .course-card:hover .add-cart-btn {
        opacity: 1;
        transform: translateY(0);
    }