/* ============================================
   LOGIN RESPONSIVE CSS
   Hỗ trợ đa màn hình: Mobile, Tablet, Desktop
   ============================================ */

/* ============================================
   MOBILE NHỎ (< 480px)
   ============================================ */
@media screen and (max-width: 479px) {
    body {
        background-size: cover !important;
        background-attachment: scroll !important;
    }

    .img-balloon {
        background-size: cover !important;
        background-attachment: scroll !important;
    }

    .cls-content {
        padding: 10px 10px 15px !important;
    }

    .panel.panel-primary {
        width: 100% !important;
        padding: 16px 12px 20px 12px !important;
        margin-top: 20px !important;
        border-radius: 12px !important;
    }

    .img-co-dang {
        max-width: 100px !important;
        height: auto !important;
    }

    .logo {
        margin-top: 8px !important;
    }

    .logo-header-sso {
        font-size: 14px !important;
        line-height: 1.4 !important;
        padding: 0 5px !important;
    }

    .title-login {
        font-size: 32px !important;
        /* padding-bottom: 12px !important; */
    }

    .box-login-dien-tu,
    .box-login-tap-trung {
        font-size: 14px !important;
        padding: 12px 8px !important;
        margin-bottom: 12px !important;
        width: 100% !important;
        max-width: 320px !important;
    }

    .login-options-row {
        gap: 16px !important;
    }

    .wrapper-img {
        padding-bottom: 10px !important;
    }

    .wrapper-img img {
        width: 80px !important;
        height: 80px !important;
    }

    .modal-login-hethong {
        padding: 10px !important;
    }

    .form-login-hethong {
        max-width: 100% !important;
        padding: 16px 12px !important;
        margin: 10px !important;
        border-radius: 12px !important;
    }

    .form-login-hethong > div:first-child {
        font-size: 18px !important;
        margin-bottom: 16px !important;
    }

    .control-label {
        font-size: 14px !important;
    }

    .form-outline .custom-input-group .form-control {
        height: 44px !important;
        font-size: 14px !important;
    }

    .custom-input-group-addon {
        padding: 12px 14px !important;
        font-size: 18px !important;
    }

    .btn-login-sso-custom {
        height: 44px !important;
        font-size: 14px !important;
        padding: 5px 20px !important;
    }

    .btn-forgot-password {
        font-size: 13px !important;
        margin-top: 10px !important;
    }

    .btn-login {
        margin: 40px 0 0 0 !important;
    }
    .subtitle-login {
        font-size: 13px !important;
        padding: 0 8px !important;
        word-wrap: break-word !important;
        overflow-wrap: break-word !important;
    }

}

/* ============================================
   MOBILE (480px - 767px)
   ============================================ */
@media screen and (min-width: 480px) and (max-width: 767px) {
    body {
        background-size: cover !important;
        background-attachment: scroll !important;
    }

    .img-balloon {
        background-size: cover !important;
        background-attachment: scroll !important;
    }

    .cls-content {
        padding: 15px !important;
    }

    .panel.panel-primary {
        width: 100% !important;
        max-width: 450px !important;
        padding: 20px 16px 24px 16px !important;
        margin-top: 30px !important;
    }

    .img-co-dang {
        max-width: 120px !important;
    }

    .logo {
        margin-top: 12px !important;
    }

    .logo-header-sso {
        font-size: 18px !important;
        line-height: 1.5 !important;
        padding: 0 10px !important;
    }

    .title-login {
        font-size: 32px !important;
        /* padding-bottom: 14px !important; */
    }

    .box-login-dien-tu,
    .box-login-tap-trung {
        font-size: 16px !important;
        padding: 14px 12px !important;
        margin-bottom: 14px !important;
        width: 100% !important;
        max-width: 320px !important;
    }

    .login-options-row {
        gap: 20px !important;
    }

    .wrapper-img {
        padding-bottom: 12px !important;
    }

    .wrapper-img img {
        width: 100px !important;
        height: 100px !important;
    }

    .form-login-hethong {
        max-width: 90% !important;
        padding: 20px 16px !important;
        margin: 20px !important;
    }

    .form-login-hethong > div:first-child {
        font-size: 20px !important;
    }

    .control-label {
        font-size: 15px !important;
    }

    .form-outline .custom-input-group .form-control {
        height: 46px !important;
        font-size: 15px !important;
    }

    .custom-input-group-addon {
        padding: 14px 16px !important;
        font-size: 19px !important;
    }

    .btn-login-sso-custom {
        height: 46px !important;
        font-size: 15px !important;
    }

    .btn-login {
        margin: 50px 0 0 0 !important;
    }
}

/* ============================================
   TABLET PORTRAIT (768px - 991px, portrait)
   ============================================ */
@media screen and (min-width: 768px) and (max-width: 991px) and (orientation: portrait) {
    .cls-content {
        padding: 2vh 15px 15px !important;
    }

    .panel.panel-primary {
        width: 480px !important;
        padding: 18px 20px 26px 20px !important;
        margin-top: 40px !important;
    }

    .img-co-dang {
        max-width: 130px !important;
    }

    .logo {
        margin-top: 14px !important;
    }

    .logo-header-sso {
        font-size: 22px !important;
        line-height: 1.4 !important;
    }

    .title-login {
        font-size: 26px !important;
        /* padding-bottom: 14px !important; */
    }

    .box-login-dien-tu,
    .box-login-tap-trung {
        font-size: 18px !important;
        padding: 14px !important;
        width: 280px !important;
    }

    .login-options-row {
        gap: 24px !important;
    }

    .wrapper-img {
        padding-bottom: 12px !important;
    }

    .wrapper-img img {
        width: 110px !important;
        height: 110px !important;
    }

    .form-login-hethong {
        max-width: 480px !important;
        padding: 18px 20px 26px 20px !important;
    }

    .form-login-hethong > div:first-child {
        font-size: 26px !important;
    }
}

/* ============================================
   TABLET (768px - 991px) - Fallback for devices không hỗ trợ orientation
   ============================================ */
@media screen and (min-width: 768px) and (max-width: 991px) {
    .cls-content {
        padding: 2vh 15px 15px !important;
    }

    .panel.panel-primary {
        width: 480px !important;
        padding: 18px 20px 26px 20px !important;
        margin-top: 40px !important;
    }

    .img-co-dang {
        max-width: 130px !important;
    }

    .logo {
        margin-top: 14px !important;
    }

    .logo-header-sso {
        font-size: 22px !important;
        line-height: 1.4 !important;
    }

    .title-login {
        font-size: 26px !important;
        /* padding-bottom: 14px !important; */
    }

    .box-login-dien-tu,
    .box-login-tap-trung {
        font-size: 18px !important;
        padding: 14px !important;
        width: 280px !important;
    }

    .login-options-row {
        gap: 24px !important;
    }

    .wrapper-img {
        padding-bottom: 12px !important;
    }

    .wrapper-img img {
        width: 110px !important;
        height: 110px !important;
    }

    .form-login-hethong {
        max-width: 480px !important;
        padding: 18px 20px 26px 20px !important;
    }

    .form-login-hethong > div:first-child {
        font-size: 26px !important;
    }
}

/* ============================================
   DESKTOP NHỎ (992px - 1199px)
   ============================================ */
@media screen and (min-width: 992px) and (max-width: 1199px) {
    .cls-content {
        padding: 2.5vh 15px 15px !important;
    }

    .panel.panel-primary {
        width: 100% !important;
        max-width: 780px !important;
        padding: 20px 22px 28px 22px !important;
        margin-top: 50px !important;
    }

    .login-options-row {
        gap: 32px !important;
    }

    .box-login-dien-tu,
    .box-login-tap-trung {
        width: 300px !important;
    }

    .img-co-dang {
        max-width: 140px !important;
    }

    .logo-header-sso {
        font-size: 26px !important;
    }

    .title-login {
        font-size: 28px !important;
    }

    .box-login-dien-tu,
    .box-login-tap-trung {
        font-size: 19px !important;
        width: 300px !important;
    }

    .login-options-row {
        gap: 32px !important;
    }

    .form-login-hethong {
        max-width: 490px !important;
        padding: 20px 22px 28px 22px !important;
    }

    .form-login-hethong > div:first-child {
        font-size: 28px !important;
    }
}

/* ============================================
   DESKTOP VỪA (1200px - 1439px)
   ============================================ */
@media screen and (min-width: 1200px) and (max-width: 1439px) {
    .cls-content {
        padding: 3vh 15px 15px !important;
    }

    .panel.panel-primary {
        width: 100% !important;
        max-width: 840px !important;
        padding: 16px 24px 31px 24px !important;
        margin-top: 58px !important;
    }

    .login-options-row {
        gap: 36px !important;
    }

    .box-login-dien-tu,
    .box-login-tap-trung {
        width: 320px !important;
    }

    .img-co-dang {
        max-width: 150px !important;
    }

    .logo-header-sso {
        font-size: 28px !important;
    }

    .title-login {
        font-size: 30px !important;
    }

    .box-login-dien-tu,
    .box-login-tap-trung {
        font-size: 20px !important;
    }

    .form-login-hethong {
        max-width: 500px !important;
        padding: 16px 24px 31px 24px !important;
    }

    .form-login-hethong > div:first-child {
        font-size: 32px !important;
    }
}

/* ============================================
   DESKTOP LỚN (>= 1440px, height > 700px)
   Chỉ áp dụng khi không phải landscape thấp
   ============================================ */
@media screen and (min-width: 1440px) and (min-height: 701px) {
    .cls-content {
        padding: 3vh 15px 15px !important;
    }

    .panel.panel-primary {
        width: 100% !important;
        max-width: 840px !important;
        padding: 20px 28px 35px 28px !important;
        margin-top: 60px !important;
    }

    .login-options-row {
        gap: 40px !important;
    }

    .box-login-dien-tu,
    .box-login-tap-trung {
        width: 340px !important;
    }

    .img-co-dang {
        max-width: 160px !important;
    }

    .logo-header-sso {
        font-size: 32px !important;
    }

    .title-login {
        font-size: 32px !important;
    }

    .box-login-dien-tu,
    .box-login-tap-trung {
        font-size: 20px !important;
        padding: 18px !important;
        width: 340px !important;
    }

    .login-options-row {
        gap: 40px !important;
    }

    .wrapper-img img {
        width: 114px !important;
        height: 114px !important;
    }

    .form-login-hethong {
        max-width: 520px !important;
        padding: 20px 28px 35px 28px !important;
    }

    .form-login-hethong > div:first-child {
        font-size: 32px !important;
    }

    .form-outline .custom-input-group .form-control {
        height: 50px !important;
        font-size: 16px !important;
    }

    .btn-login-sso-custom {
        height: 50px !important;
        font-size: 17px !important;
    }
}

/* ============================================
   TABLET LANDSCAPE (768px - 1024px width, landscape)
   ============================================ */
@media screen and (min-width: 768px) and (max-width: 1024px) and (orientation: landscape) {
    body {
        background-size: cover !important;
        background-attachment: scroll !important;
        height: auto !important;
        min-height: 100vh !important;
    }

    .img-balloon {
        background-size: cover !important;
        background-attachment: scroll !important;
        height: auto !important;
        min-height: 100vh !important;
    }

    .cls-content {
        padding: 1vh 15px 10px !important;
        min-height: 100vh !important;
        display: flex !important;
        flex-direction: column !important;
        justify-content: center !important;
    }

    .cls-container {
        min-height: 100vh !important;
        display: flex !important;
        flex-direction: column !important;
        justify-content: center !important;
    }

    .panel.panel-primary {
        width: 500px !important;
        margin: 0 auto !important;
        padding: 16px 20px 20px 20px !important;
        margin-top: 5px !important;
        margin-bottom: 5px !important;
        max-width: 90% !important;
    }

    .img-co-dang {
        max-width: 120px !important;
        margin-bottom: 5px !important;
    }

    .logo {
        margin-top: 5px !important;
        margin-bottom: 5px !important;
    }

    .logo-header-sso {
        font-size: 18px !important;
        line-height: 1.3 !important;
        margin: 0 !important;
        padding: 0 10px !important;
    }

    .title-login {
        font-size: 22px !important;
        padding-bottom: 10px !important;
        margin-bottom: 10px !important;
    }

    .box-login-dien-tu,
    .box-login-tap-trung {
        padding: 10px 12px !important;
        font-size: 16px !important;
        margin-bottom: 10px !important;
        width: 260px !important;
    }

    .login-options-row {
        gap: 20px !important;
    }

    .wrapper-img {
        padding-bottom: 6px !important;
        margin-bottom: 0 !important;
    }

    .wrapper-img img {
        width: 90px !important;
        height: 90px !important;
    }

    .form-login-hethong {
        max-width: 500px !important;
        padding: 16px 20px 20px 20px !important;
        margin: 10px !important;
        max-height: 85vh !important;
        overflow-y: auto !important;
    }

    .form-login-hethong > div:first-child {
        font-size: 22px !important;
        margin-bottom: 12px !important;
    }

    .control-label {
        font-size: 14px !important;
        margin-bottom: 4px !important;
    }

    .form-outline .custom-input-group .form-control {
        height: 44px !important;
        font-size: 14px !important;
    }

    .custom-input-group-addon {
        padding: 12px 14px !important;
        font-size: 18px !important;
    }

    .btn-login-sso-custom {
        height: 44px !important;
        font-size: 15px !important;
    }

    .btn-login {
        margin: 30px 0 0 0 !important;
    }

    .btn-forgot-password {
        font-size: 13px !important;
        margin-top: 8px !important;
    }

    .control-group,
    .form-group {
        margin-bottom: 10px !important;
    }
}

/* ============================================
   MOBILE LANDSCAPE (max-width: 767px, landscape)
   ============================================ */
@media screen and (max-width: 767px) and (orientation: landscape) {
    body {
        background-size: cover !important;
        background-attachment: scroll !important;
        height: auto !important;
        min-height: 100vh !important;
    }

    .img-balloon {
        background-size: cover !important;
        background-attachment: scroll !important;
        height: auto !important;
        min-height: 100vh !important;
    }

    .cls-content {
        padding: 5px 10px 10px !important;
        min-height: 100vh !important;
        display: flex !important;
        flex-direction: column !important;
        justify-content: center !important;
    }

    .cls-container {
        min-height: 100vh !important;
        display: flex !important;
        flex-direction: column !important;
        justify-content: center !important;
    }

    .panel.panel-primary {
        width: 100% !important;
        max-width: 450px !important;
        margin: 0 auto !important;
        padding: 12px 14px 16px 14px !important;
        margin-top: 5px !important;
        margin-bottom: 5px !important;
    }

    .img-co-dang {
        max-width: 90px !important;
        margin-bottom: 3px !important;
    }

    .logo {
        margin-top: 3px !important;
        margin-bottom: 3px !important;
    }

    .logo-header-sso {
        font-size: 12px !important;
        line-height: 1.2 !important;
        margin: 0 !important;
        padding: 0 5px !important;
    }

    .title-login {
        font-size: 18px !important;
        padding-bottom: 8px !important;
        margin-bottom: 8px !important;
    }

    .box-login-dien-tu,
    .box-login-tap-trung {
        padding: 8px 10px !important;
        font-size: 14px !important;
        margin-bottom: 8px !important;
        width: 100% !important;
        max-width: 280px !important;
    }

    .login-options-row {
        gap: 16px !important;
    }

    .wrapper-img {
        padding-bottom: 4px !important;
        margin-bottom: 0 !important;
    }

    .wrapper-img img {
        width: 70px !important;
        height: 70px !important;
    }

    .form-login-hethong {
        max-width: 95% !important;
        padding: 16px 12px !important;
        margin: 5px !important;
        max-height: 90vh !important;
        overflow-y: auto !important;
    }

    .form-login-hethong > div:first-child {
        font-size: 16px !important;
        margin-bottom: 10px !important;
    }

    .control-label {
        font-size: 13px !important;
        margin-bottom: 3px !important;
    }

    .form-outline .custom-input-group .form-control {
        height: 40px !important;
        font-size: 13px !important;
    }

    .custom-input-group-addon {
        padding: 10px 12px !important;
        font-size: 16px !important;
    }

    .btn-login-sso-custom {
        height: 40px !important;
        font-size: 14px !important;
    }

    .btn-login {
        margin: 20px 0 0 0 !important;
    }

    .btn-forgot-password {
        font-size: 12px !important;
        margin-top: 6px !important;
    }

    .control-group,
    .form-group {
        margin-bottom: 8px !important;
    }
}

/* ============================================
   TABLET LANDSCAPE LARGE (1024px - 1366px width, landscape, height <= 800px)
   ============================================ */
@media screen and (min-width: 1025px) and (max-width: 1366px) and (orientation: landscape) and (max-height: 800px) {
    body {
        background-size: cover !important;
        background-attachment: scroll !important;
        height: auto !important;
        min-height: 100vh !important;
    }

    .img-balloon {
        background-size: cover !important;
        background-attachment: scroll !important;
        height: auto !important;
        min-height: 100vh !important;
    }

    .cls-content {
        padding: 1.5vh 15px 15px !important;
        min-height: 100vh !important;
        display: flex !important;
        flex-direction: column !important;
        justify-content: center !important;
    }

    .cls-container {
        min-height: 100vh !important;
        display: flex !important;
        flex-direction: column !important;
        justify-content: center !important;
    }

    .panel.panel-primary {
        width: 520px !important;
        padding: 16px 20px 20px 20px !important;
        margin: 0 auto !important;
        margin-top: 10px !important;
        margin-bottom: 10px !important;
        max-width: 90% !important;
    }

    .img-co-dang {
        max-width: 130px !important;
        margin-bottom: 5px !important;
    }

    .logo {
        margin-top: 5px !important;
        margin-bottom: 5px !important;
    }

    .logo-header-sso {
        font-size: 20px !important;
        line-height: 1.3 !important;
        margin: 0 !important;
        padding: 0 10px !important;
    }

    .title-login {
        font-size: 24px !important;
        padding-bottom: 10px !important;
        margin-bottom: 10px !important;
    }

    .box-login-dien-tu,
    .box-login-tap-trung {
        padding: 12px !important;
        font-size: 17px !important;
        margin-bottom: 10px !important;
        width: 280px !important;
    }

    .login-options-row {
        gap: 24px !important;
    }

    .wrapper-img {
        padding-bottom: 6px !important;
        margin-bottom: 0 !important;
    }

    .wrapper-img img {
        width: 100px !important;
        height: 100px !important;
    }

    .form-login-hethong {
        max-width: 520px !important;
        padding: 16px 20px 20px 20px !important;
        margin: 10px !important;
        max-height: 85vh !important;
        overflow-y: auto !important;
    }

    .form-login-hethong > div:first-child {
        font-size: 24px !important;
        margin-bottom: 12px !important;
    }

    .control-label {
        font-size: 14px !important;
        margin-bottom: 4px !important;
    }

    .form-outline .custom-input-group .form-control {
        height: 44px !important;
        font-size: 14px !important;
    }

    .custom-input-group-addon {
        padding: 12px 14px !important;
        font-size: 18px !important;
    }

    .btn-login-sso-custom {
        height: 44px !important;
        font-size: 15px !important;
    }

    .btn-login {
        margin: 30px 0 0 0 !important;
    }

    .btn-forgot-password {
        font-size: 13px !important;
        margin-top: 8px !important;
    }

    .control-group,
    .form-group {
        margin-bottom: 10px !important;
    }
}

/* ============================================
   LARGE LANDSCAPE DISPLAYS (1367px - 1920px width, height <= 700px)
   Xử lý màn hình rộng nhưng thấp như 1496x608
   ============================================ */
@media screen and (min-width: 1367px) and (max-width: 1920px) and (max-height: 700px) and (orientation: landscape),
       screen and (min-width: 1367px) and (max-width: 1920px) and (max-height: 700px) {
    body {
        background-size: cover !important;
        background-attachment: scroll !important;
        height: auto !important;
        min-height: 100vh !important;
    }

    .img-balloon {
        background-size: cover !important;
        background-attachment: scroll !important;
        height: auto !important;
        min-height: 100vh !important;
    }

    .cls-content {
        padding: 0.5vh 15px 10px !important;
        min-height: 100vh !important;
        display: flex !important;
        flex-direction: column !important;
        justify-content: center !important;
    }

    .cls-container {
        min-height: 100vh !important;
        display: flex !important;
        flex-direction: column !important;
        justify-content: center !important;
    }

    .panel.panel-primary {
        width: 500px !important;
        padding: 14px 18px 18px 18px !important;
        margin: 0 auto !important;
        margin-top: 3px !important;
        margin-bottom: 3px !important;
        max-width: 90% !important;
    }

    .img-co-dang {
        max-width: 110px !important;
        margin-bottom: 3px !important;
    }

    .logo {
        margin-top: 3px !important;
        margin-bottom: 3px !important;
    }

    .logo-header-sso {
        font-size: 16px !important;
        line-height: 1.25 !important;
        margin: 0 !important;
        padding: 0 8px !important;
    }

    .title-login {
        font-size: 20px !important;
        padding-bottom: 8px !important;
        margin-bottom: 8px !important;
    }

    .box-login-dien-tu,
    .box-login-tap-trung {
        padding: 10px 12px !important;
        font-size: 15px !important;
        margin-bottom: 8px !important;
        width: 260px !important;
    }

    .login-options-row {
        gap: 20px !important;
    }

    .wrapper-img {
        padding-bottom: 5px !important;
        margin-bottom: 0 !important;
    }

    .wrapper-img img {
        width: 85px !important;
        height: 85px !important;
    }

    .form-login-hethong {
        max-width: 500px !important;
        padding: 14px 18px 18px 18px !important;
        margin: 8px !important;
        max-height: 88vh !important;
        overflow-y: auto !important;
    }

    .form-login-hethong > div:first-child {
        font-size: 20px !important;
        margin-bottom: 10px !important;
    }

    .control-label {
        font-size: 13px !important;
        margin-bottom: 3px !important;
    }

    .form-outline .custom-input-group .form-control {
        height: 42px !important;
        font-size: 13px !important;
    }

    .custom-input-group-addon {
        padding: 11px 13px !important;
        font-size: 17px !important;
    }

    .btn-login-sso-custom {
        height: 42px !important;
        font-size: 14px !important;
    }

    .btn-login {
        margin: 25px 0 0 0 !important;
    }

    .btn-forgot-password {
        font-size: 12px !important;
        margin-top: 6px !important;
    }

    .control-group,
    .form-group {
        margin-bottom: 8px !important;
    }
}

/* ============================================
   ULTRA WIDE LANDSCAPE (width > 1920px, height <= 700px)
   ============================================ */
@media screen and (min-width: 1921px) and (max-height: 700px) and (orientation: landscape),
       screen and (min-width: 1921px) and (max-height: 700px) {
    .cls-content {
        padding: 0.5vh 15px 10px !important;
        min-height: 100vh !important;
        display: flex !important;
        flex-direction: column !important;
        justify-content: center !important;
    }

    .panel.panel-primary {
        width: 520px !important;
        padding: 16px 20px 20px 20px !important;
        margin: 0 auto !important;
        margin-top: 5px !important;
        margin-bottom: 5px !important;
    }

    .img-co-dang {
        max-width: 120px !important;
        margin-bottom: 5px !important;
    }

    .logo-header-sso {
        font-size: 18px !important;
        line-height: 1.3 !important;
    }

    .title-login {
        font-size: 22px !important;
        padding-bottom: 10px !important;
        margin-bottom: 10px !important;
    }

    .box-login-dien-tu,
    .box-login-tap-trung {
        padding: 12px !important;
        font-size: 16px !important;
        margin-bottom: 10px !important;
        width: 280px !important;
    }

    .login-options-row {
        gap: 24px !important;
    }

    .wrapper-img img {
        width: 90px !important;
        height: 90px !important;
    }

    .form-login-hethong {
        max-width: 520px !important;
        padding: 16px 20px 20px 20px !important;
        max-height: 85vh !important;
        overflow-y: auto !important;
    }
}

/* ============================================
   HIGH DPI DISPLAYS (Retina)
   ============================================ */
@media screen and (-webkit-min-device-pixel-ratio: 2),
       screen and (min-resolution: 192dpi) {
    .img-co-dang,
    .wrapper-img img {
        image-rendering: -webkit-optimize-contrast;
        image-rendering: crisp-edges;
    }
}

/* ============================================
   ACCESSIBILITY IMPROVEMENTS
   ============================================ */
@media screen and (prefers-reduced-motion: reduce) {
    .modal-login-hethong,
    .form-login-hethong {
        animation: none !important;
    }
}

/* Focus styles for better accessibility */
.form-control:focus,
.btn:focus {
    outline: 2px solid #004A92;
    outline-offset: 2px;
}

/* ============================================
   TOUCH DEVICE OPTIMIZATIONS
   ============================================ */
@media (hover: none) and (pointer: coarse) {
    .box-login-tap-trung,
    .box-login-dien-tu {
        -webkit-tap-highlight-color: rgba(0, 74, 146, 0.2);
    }

    .btn-login-sso-custom {
        min-height: 48px;
        min-width: 120px;
    }

    .custom-input-group-addon {
        min-width: 48px;
        min-height: 48px;
    }
}

/* ============================================
   HIGH CONTRAST MODE
   ============================================ */
@media (prefers-contrast: high) {
    .panel.panel-primary {
        border: 2px solid #000 !important;
    }

    .box-login-tap-trung,
    .box-login-dien-tu {
        border: 2px solid #004A92 !important;
    }

    .btn-login-sso-custom {
        border: 2px solid #000 !important;
    }
}

/* ============================================
   PRINT STYLES
   ============================================ */
@media print {
    .modal-login-hethong {
        display: none !important;
    }

    .bg-img,
    .img-balloon {
        display: none !important;
    }

    .panel.panel-primary {
        box-shadow: none !important;
        border: 1px solid #ccc !important;
    }
}

/* ============================================
   UTILITY CLASSES
   ============================================ */
.hidden-mobile {
    display: block;
}

.hidden-desktop {
    display: none;
}

@media screen and (max-width: 767px) {
    .hidden-mobile {
        display: none !important;
    }

    .hidden-desktop {
        display: block !important;
    }
}

/* ============================================
   SMOOTH TRANSITIONS
   ============================================ */
.panel.panel-primary,
.box-login-tap-trung,
.box-login-dien-tu,
.form-login-hethong {
    transition: all 0.3s ease-in-out;
}

/* ============================================
   HIDDEN BY MODAL CLASS - Override responsive CSS
   ============================================ */
.cls-content.hidden-by-modal {
    display: none !important;
    visibility: hidden !important;
}

/* ============================================
   CLOSE BUTTON STYLES
   ============================================ */
.close-modal-btn {
    position: absolute;
    top: 12px;
    right: 12px;
    background: transparent;
    border: none;
    font-size: 24px;
    color: #dc3545;
    cursor: pointer;
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    transition: all 0.2s ease;
    z-index: 10;
    padding: 0;
}

.close-modal-btn:hover {
    background-color: #fee;
    color: #c82333;
}

.close-modal-btn:active {
    background-color: #fcc;
    transform: scale(0.95);
}

.close-modal-btn i {
    line-height: 1;
}

/* Responsive cho nút đóng */
@media screen and (max-width: 767px) {
    .close-modal-btn {
        top: 8px;
        right: 8px;
        width: 36px;
        height: 36px;
        font-size: 20px;
    }
}

/* ============================================
   FIX FOR IOS SAFARI
   ============================================ */
@supports (-webkit-touch-callout: none) {
    .img-balloon {
        background-attachment: scroll !important;
    }

    body {
        -webkit-overflow-scrolling: touch;
    }

    .form-login-hethong {
        -webkit-overflow-scrolling: touch;
    }
}