/*------------------------ Responsive -----------------------*/

@media (max-width: 1199px) {
    .container {
        max-width: 100%;
        --bs-gutter-x: 30px;
    }
}

@media (max-width: 991px) {
    .header {
        padding: 12px 0px;
    }
    .header-backdrop,
    .header-close-btn,
    .header-hamburger-btn {
        display: block;
        width: 40px;
        height: 34px;
        border: 0px;
        background-color: transparent;
        cursor: pointer;
    }
    .header-hamburger-btn span {
        display: block;
        position: relative;
        width: 24px;
        height: 2px;
        margin: auto;
        background-color: var(--black-90);
    }
    .header-hamburger-btn span::before,
    .header-hamburger-btn span::after {
        content: "";
        position: absolute;
        left: 0px;
        width: 100%;
        height: 100%;
        background-color: var(--black-90);
    }
    .header-hamburger-btn span::before {
        top: -7px;
    }
    .header-hamburger-btn span::after {
        top: 7px;
    }
    .header-close-btn {
        position: absolute;
        top: 15px;
        left: 15px;
        width: 40px;
        height: 40px;
        background-color: var(--main-color);
        color: var(--WHITE);
        border-radius: 5px;
        cursor: pointer;
    }
    .header-menu {
        position: fixed;
        top: 0px;
        right: -300px;
        width: 300px;
        height: 100vh;
        padding: 70px 0px 50px;
        box-shadow: var(--shadow);
        background-color: var(--white);
        overflow-y: auto;
        visibility: hidden;
        transition: all 0.5s ease;
        z-index: 1000;
    }
    .header-menu.open {
        right: 0px;
        visibility: visible;
    }
    .header .menu-item {
        display: block;
        margin: 0px;
    }
    .header .menu-item > a {
        display: flex;
        align-items: center;
        justify-content: space-between;
        padding: 12px 15px;
        border-bottom: 1px solid var(--border-color-1);
    }
    .header .menu-item:first-child > a {
        border-top: 1px solid var(--border-color-1);
    }
    .header .menu-item.active > a i {
        transform: rotate(-180deg);
    }
    .header .sub-menu {
        position: relative;
        top: auto;
        width: 100%;
        max-height: 0px;
        padding: 0px;
        border-radius: 0px;
        box-shadow: none;
        transform: translateY(0);
        overflow: hidden;
        opacity: 1;
        visibility: visible;
    }
    .header .sub-menu-item a {
        padding: 12px 45px;
        border-bottom: 1px solid var(--border-color-1);
    }
    .header-backdrop {
        position: fixed;
        top: 0px;
        left: 0px;
        width: 100%;
        height: 100%;
        background-color: var(--white);
        opacity: 0;
        visibility: hidden;
        transition: all 0.5s ease;
        z-index: 999;
    }
    .header-backdrop.active {
        visibility: visible;
        opacity: 0.8;
    }
    .circular-img {
        max-width: 280px;
    }
    .circular-img img {
        max-width: 240px;
    }
    .circular-img-circle {
        width: 280px;
        height: 280px;
    }
    .banner-text h1 {
        font-size: 35px;
    }
    .section-title .sub-title {
        font-size: 30px;
    }
    .course-sidebar {
        margin-top: 30px;
    }
    .course-instructor .img-box img {
        width: 100px;
    }
    .course-instructor .details-wrap {
        margin-bottom: 15px;
    }
}

@media (max-width: 767px) {
    .container {
        --bs-gutter-x: 15px;
    }
    .box {
        padding: 20px 15px;
    }
    .bai-section,
    .banner-text {
        text-align: center;
    }
    .banner-text h1 {
        font-size: 24px;
    }
    .section-title .title,
    h3,
    .banner-text h2 {
        font-size: 18px;
    }
    .form-title,
    .section-title .sub-title {
        font-size: 22px;
    }
    .course-header h2 {
        font-size: 24px;
    }
    .course-curriculum .accordion-button {
        padding-right: 15px;
    }
    .course-curriculum .accordion-button span {
        position: relative;
        right: auto;
        width: 100%;
        margin-top: 8px;
        font-size: 12px;
    }
    .course-curriculum ul li {
        padding: 0px 0px 0px 20px;
    }
    .course-curriculum ul li span {
        display: block;
        position: relative;
        margin-top: 5px;
        font-size: 12px;
    }
    .rating-box {
        margin-bottom: 15px;
    }
    .rating-summary {
        margin-bottom: 15px;
    }
}

@media (max-width: 575px) {
    .header-logo a {
        font-size: 22px;
    }
    .circular-img {
        max-width: 230px;
    }
    .circular-img img {
        max-width: 200px;
    }
    .circular-img-circle {
        width: 230px;
        height: 230px;
    }
    .modal-dialog {
        margin: 8px 15px;
    }
    .footer-item {
        text-align: center;
    }
}