/* Dentocode mobile/iPhone compatibility layer. Content and data are unchanged. */
html {
    -webkit-text-size-adjust: 100%;
    text-size-adjust: 100%;
    min-height: 100%;
}

body {
    max-width: 100%;
    overflow-x: hidden;
    -webkit-tap-highlight-color: transparent;
}

*,
*::before,
*::after {
    box-sizing: border-box;
}

img,
video,
svg,
canvas,
iframe {
    max-width: 100%;
}

img,
video {
    height: auto;
}

button,
input,
select,
textarea {
    max-width: 100%;
}

/* iOS Safari zooms inputs smaller than 16px. */
input,
select,
textarea {
    font-size: max(16px, 1em);
}

pre,
code {
    max-width: 100%;
    overflow-wrap: anywhere;
}

pre {
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
}

table {
    max-width: 100%;
}

.table-responsive,
.table-container,
[data-table-wrapper] {
    max-width: 100%;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
}

@media (max-width: 768px) {
    html,
    body {
        width: 100%;
        min-width: 0;
    }

    .container,
    .container-fluid {
        width: 100%;
        max-width: 100%;
        padding-left: 16px;
        padding-right: 16px;
    }

    .row {
        width: 100%;
        max-width: 100%;
        margin-left: 0;
        margin-right: 0;
    }

    header,
    main,
    footer,
    nav,
    section,
    .navbar,
    .navbar > .container,
    .navbar > .container-fluid {
        width: 100%;
        max-width: 100%;
    }

    .navbar-collapse {
        width: 100%;
        max-width: 100%;
        overflow: visible;
    }

    .navbar-nav {
        width: 100%;
        align-items: stretch;
    }

    .hero-modern,
    .hero-content,
    .hero-copy,
    .hero-visual,
    .hero-visual-card {
        width: 100%;
        max-width: 100%;
        min-width: 0;
    }

    .hero-title,
    h1,
    h2,
    h3 {
        max-width: 100%;
        overflow-wrap: anywhere;
    }

    /* Keep the main heading readable even while the deferred Bootstrap
       stylesheet is still downloading on a slow mobile connection. */
    .hero-title {
        color: #ffffff;
        -webkit-text-fill-color: #ffffff;
    }

    .hero-title span {
        color: #ff4d4d;
        -webkit-text-fill-color: #ff4d4d;
    }

    .navbar-modern .navbar-collapse.show {
        position: relative;
        z-index: 20;
        opacity: 1;
        visibility: visible;
    }

    .row {
        --bs-gutter-x: 1rem;
    }

    .modal-dialog {
        width: auto;
        max-width: calc(100% - 24px);
        margin: 12px auto;
    }

    .modal-content {
        max-height: calc(100dvh - 24px);
        overflow: hidden;
    }

    .modal-body {
        max-height: calc(100dvh - 160px);
        overflow-y: auto;
        -webkit-overflow-scrolling: touch;
    }

    .d-flex,
    .flex-row {
        min-width: 0;
    }

    .btn,
    button,
    a.btn,
    [role="button"] {
        touch-action: manipulation;
    }

    .stats-grid,
    .courses-grid,
    .courses-grid-modern,
    .testimonials-grid,
    .upload-grid,
    .admin-grid,
    .dashboard-grid,
    .features-grid {
        grid-template-columns: minmax(0, 1fr) !important;
    }

    .card,
    .course-card,
    .course-card-modern,
    .testimonial-card-modern,
    .admin-card {
        min-width: 0;
        max-width: 100%;
    }

    .navbar,
    .nav-container,
    .header-content,
    .top-bar {
        max-width: 100%;
    }

    .navbar-nav,
    .nav-links,
    .action-buttons,
    .button-group {
        max-width: 100%;
        flex-wrap: wrap;
    }

    .hero,
    .hero-section,
    .page-hero,
    .section,
    section {
        max-width: 100%;
    }

    .title,
    .item-title,
    .course-title,
    .upload-name,
    .text-truncate,
    .nav-link {
        min-width: 0;
        overflow-wrap: anywhere;
    }
}

@media (max-width: 480px) {
    .container,
    .container-fluid {
        padding-left: 12px;
        padding-right: 12px;
    }

    .navbar-brand,
    .navbar-brand-modern,
    .navbar-brand-course {
        max-width: calc(100% - 58px);
        min-width: 0;
        overflow: hidden;
    }

    .course-navbar .container-fluid {
        display: flex;
        align-items: center;
        justify-content: space-between;
        gap: 8px;
    }

    .navbar-brand-course {
        display: inline-flex;
        align-items: center;
        gap: 6px;
        font-size: 1rem;
        white-space: nowrap;
    }

    .navbar-brand-course img {
        width: 34px;
        height: 34px;
        object-fit: contain;
    }

    .btn-back-course {
        flex: 0 0 auto;
        padding: 8px 10px;
        font-size: 0.78rem;
        white-space: nowrap;
    }

    .navbar-brand img,
    .navbar-brand-modern img,
    .navbar-brand-course img {
        max-width: 100%;
    }

    .hero-modern {
        padding-left: 12px;
        padding-right: 12px;
    }

    .hero-title {
        font-size: clamp(2.35rem, 13vw, 3.15rem);
        line-height: 1.02;
    }

    .hero-description {
        max-width: 100%;
        overflow-wrap: anywhere;
    }

    .stats-grid,
    .visual-metrics {
        width: 100%;
        max-width: 100%;
    }

    .floating-pill {
        max-width: 42%;
        overflow: hidden;
        text-overflow: ellipsis;
        white-space: nowrap;
    }

    .modal-dialog {
        max-width: calc(100% - 16px);
        margin: 8px auto;
    }

    .modal-content {
        max-height: calc(100dvh - 16px);
    }

    .modal-body {
        max-height: calc(100dvh - 145px);
    }

    .btn,
    button {
        white-space: normal;
    }
}

@supports (padding: env(safe-area-inset-bottom)) {
    body {
        padding-bottom: env(safe-area-inset-bottom);
    }

    .fixed-bottom,
    .bottom-nav,
    .mobile-bottom-nav {
        padding-bottom: env(safe-area-inset-bottom);
    }
}

/* Course page: keep the desktop information hierarchy while making the
   mobile flow easier to scan and use with one hand. */
@media (max-width: 768px) {
    .course-navbar .container-fluid,
    .course-header .container-fluid,
    .course-wrapper {
        width: 100%;
        max-width: 100%;
    }

    .course-header {
        padding: 1rem 0.8rem 0.85rem !important;
    }

    .course-header h1 {
        font-size: clamp(1.35rem, 6vw, 1.9rem) !important;
        line-height: 1.18;
        margin: 0.55rem 0 0.45rem;
    }

    .course-header .course-subtitle {
        font-size: 0.82rem;
        line-height: 1.45;
        margin-bottom: 0.65rem;
    }

    .course-progress-rail {
        margin-top: 0.75rem !important;
        padding: 0.75rem !important;
    }

    .course-progress-insights {
        flex-wrap: wrap;
        font-size: 0.62rem;
        line-height: 1.35;
    }

    .course-quick-actions {
        display: grid !important;
        grid-template-columns: repeat(2, minmax(0, 1fr));
        gap: 0.45rem;
        overflow: visible !important;
        padding-bottom: 0 !important;
    }

    .course-quick-action {
        min-width: 0;
        min-height: 42px;
        justify-content: center;
        padding: 0.45rem 0.35rem !important;
        font-size: 0.68rem;
        text-align: center;
        white-space: normal;
    }

    .course-quick-action:last-child {
        grid-column: 1 / -1;
    }

    /* On a phone, show the lesson/video first like the laptop's main column,
       then place the searchable course contents below it. */
    .course-wrapper {
        display: flex !important;
        flex-direction: column !important;
        gap: 0.9rem !important;
        padding: 0.9rem 0.7rem 2rem !important;
    }

    .course-main {
        order: 1 !important;
        width: 100%;
    }

    .course-sidebar {
        position: static !important;
        order: 2 !important;
        width: 100% !important;
        max-width: none !important;
        height: auto !important;
        max-height: 54vh;
        overflow-y: auto;
        border-radius: 18px;
    }

    .course-sidebar .sidebar-header {
        position: sticky;
        top: 0;
    }

    .video-player-wrapper {
        width: 100%;
        min-height: 0 !important;
        aspect-ratio: 16 / 9;
        max-height: none !important;
        border-radius: 16px;
    }

    .lesson-details {
        margin-top: 0.85rem;
        padding: 1rem !important;
        border-radius: 16px;
    }

    .course-tabs {
        top: 58px;
        padding-inline: 0.35rem;
    }

    .tab-btn {
        min-height: 42px;
        padding-inline: 0.65rem;
        font-size: 0.72rem;
    }
}

/* Homepage mobile navbar: keep the desktop navigation visible without a
   hamburger interaction. The links wrap below the brand on narrow screens. */
@media (max-width: 768px) {
    .navbar-modern > .container-fluid {
        flex-wrap: wrap;
        align-items: center;
    }

    .navbar-modern .navbar-toggler {
        display: none !important;
    }

    .navbar-modern .navbar-collapse,
    .navbar-modern .navbar-collapse.collapse:not(.show) {
        display: block !important;
        flex-basis: 100%;
        width: 100%;
        height: auto !important;
        visibility: visible !important;
        opacity: 1 !important;
        margin-top: 0.65rem;
        padding: 0.65rem 0 0;
        border-top: 1px solid rgba(120, 225, 233, 0.12);
    }

    .navbar-modern .navbar-nav {
        display: flex;
        flex-direction: row;
        flex-wrap: wrap;
        gap: 0.2rem;
        margin: 0 !important;
    }

    .navbar-modern .nav-link-modern {
        padding: 0.45rem 0.65rem;
        font-size: 0.78rem;
    }

    .navbar-modern .d-flex.align-items-center.gap-2 {
        display: flex !important;
        flex-wrap: wrap;
        gap: 0.45rem !important;
        margin-top: 0.55rem;
    }

    .navbar-modern .nav-social-icons {
        gap: 0.3rem;
    }

    .navbar-modern .nav-social-icons a {
        width: 30px;
        height: 30px;
        font-size: 0.72rem;
    }

    .navbar-modern .search-wrapper {
        max-width: 100%;
    }
}

/* Compact single-row homepage navbar for phones. */
@media (max-width: 768px) {
    .navbar-modern > .container-fluid {
        flex-wrap: nowrap;
        overflow-x: auto;
        overflow-y: visible;
        scrollbar-width: none;
        gap: 0.35rem;
        white-space: nowrap;
    }

    .navbar-modern > .container-fluid::-webkit-scrollbar {
        display: none;
    }

    .navbar-modern .navbar-brand-modern {
        flex: 0 0 auto;
        min-width: max-content;
        margin-right: 0.2rem;
    }

    .navbar-modern .brand-tag {
        display: none;
    }

    .navbar-modern .brand-copy {
        gap: 0;
    }

    .navbar-modern .brand-name {
        font-size: 0.96rem;
    }

    .navbar-modern .brand-mark-wrap,
    .navbar-modern .navbar-brand-modern img {
        width: 38px;
        height: 38px;
    }

    .navbar-modern .navbar-collapse,
    .navbar-modern .navbar-collapse.collapse:not(.show) {
        flex: 0 0 auto;
        flex-basis: auto;
        width: auto;
        min-width: max-content;
        margin: 0 !important;
        padding: 0 !important;
        border: 0;
        display: flex !important;
        align-items: center;
    }

    .navbar-modern .navbar-nav {
        flex: 0 0 auto;
        flex-wrap: nowrap;
        width: auto;
        align-items: center;
        gap: 0.05rem;
    }

    .navbar-modern .nav-link-modern {
        flex: 0 0 auto;
        padding: 0.42rem 0.42rem;
        font-size: 0.7rem;
    }

    .navbar-modern .navbar-collapse > .d-flex.align-items-center.gap-2 {
        flex: 0 0 auto;
        flex-wrap: nowrap;
        width: auto;
        margin: 0 !important;
        gap: 0.28rem !important;
    }

    .navbar-modern .search-wrapper {
        flex: 0 0 30px;
        width: 30px;
        min-width: 30px;
    }

    .navbar-modern .search-input,
    .navbar-modern .search-shortcut {
        display: none;
    }

    .navbar-modern .nav-social-icons {
        flex: 0 0 auto;
        flex-wrap: nowrap;
        gap: 0.18rem;
    }

    .navbar-modern .nav-social-icons a {
        width: 26px;
        height: 26px;
        font-size: 0.62rem;
    }

    .navbar-modern .btn-login-modern {
        min-width: max-content;
        padding: 0.38rem 0.55rem;
        font-size: 0.68rem;
    }
}

/* Final mobile homepage navbar design: balanced rows, no hamburger and no
   horizontal scrolling. */
@media (max-width: 768px) {
    .navbar-modern {
        margin: 0.45rem 0.45rem 0;
        padding: 0 !important;
        border: 1px solid rgba(120, 225, 233, 0.14);
        border-radius: 18px;
        background: rgba(5, 12, 21, 0.94);
        box-shadow: 0 12px 30px rgba(0, 0, 0, 0.28);
    }

    .navbar-modern > .container-fluid {
        display: grid !important;
        grid-template-columns: minmax(0, 1fr) auto;
        grid-template-areas:
            "brand account"
            "links links"
            "tools tools";
        gap: 0;
        width: 100%;
        padding: 0.65rem 0.7rem 0.7rem !important;
        overflow: visible !important;
        white-space: normal;
    }

    .navbar-modern .navbar-toggler {
        display: none !important;
    }

    .navbar-modern .navbar-brand-modern {
        grid-area: brand;
        min-width: 0;
        margin: 0;
    }

    .navbar-modern .brand-tag {
        display: none;
    }

    .navbar-modern .brand-name {
        font-size: 1rem;
    }

    .navbar-modern .brand-mark-wrap,
    .navbar-modern .navbar-brand-modern img {
        width: 40px;
        height: 40px;
    }

    .navbar-modern .navbar-collapse,
    .navbar-modern .navbar-collapse.collapse:not(.show) {
        display: contents !important;
        width: auto;
        height: auto !important;
        min-width: 0;
        visibility: visible !important;
        opacity: 1 !important;
        margin: 0 !important;
        padding: 0 !important;
        border: 0;
    }

    .navbar-modern .navbar-nav {
        grid-area: links;
        display: grid !important;
        grid-template-columns: repeat(3, minmax(0, 1fr));
        width: 100%;
        gap: 0.35rem;
        margin: 0.7rem 0 0 !important;
        padding-top: 0.65rem;
        border-top: 1px solid rgba(120, 225, 233, 0.12);
    }

    .navbar-modern .nav-item,
    .navbar-modern .nav-link-modern {
        min-width: 0;
        width: 100%;
    }

    .navbar-modern .nav-link-modern {
        display: block;
        padding: 0.55rem 0.25rem;
        border-radius: 10px;
        text-align: center;
        font-size: 0.72rem;
        white-space: nowrap;
    }

    .navbar-modern .navbar-collapse > .d-flex.align-items-center.gap-2 {
        grid-area: tools;
        display: flex !important;
        align-items: center;
        flex-wrap: nowrap;
        width: 100%;
        min-width: 0;
        gap: 0.35rem !important;
        margin: 0.65rem 0 0 !important;
        padding-top: 0.6rem;
        border-top: 1px solid rgba(120, 225, 233, 0.1);
    }

    .navbar-modern .search-wrapper {
        display: flex;
        flex: 1 1 100px;
        width: auto;
        max-width: none;
        min-width: 0;
        height: 32px;
    }

    .navbar-modern .search-input {
        display: block !important;
        width: 100%;
        min-width: 0;
        font-size: 0.68rem;
    }

    .navbar-modern .search-shortcut {
        display: none !important;
    }

    .navbar-modern .search-icon {
        flex: 0 0 30px;
        width: 30px;
        height: 30px;
    }

    .navbar-modern .nav-social-icons {
        display: flex;
        flex: 0 0 auto;
        flex-wrap: nowrap;
        gap: 0.2rem;
    }

    .navbar-modern .nav-social-icons a {
        width: 27px;
        height: 27px;
        font-size: 0.62rem;
    }

    .navbar-modern .user-menu,
    .navbar-modern #authButtonContainer,
    .navbar-modern #userInfoContainer {
        flex: 0 0 auto;
    }

    .navbar-modern .btn-login-modern {
        min-width: 64px;
        padding: 0.42rem 0.5rem;
        font-size: 0.68rem;
        white-space: nowrap;
    }

    .navbar-modern .btn-user-modern {
        max-width: 92px;
        padding-inline: 0.35rem;
    }

    .navbar-modern .user-button-copy {
        max-width: 42px;
        overflow: hidden;
    }
}

@media (max-width: 370px) {
    .navbar-modern .nav-social-icons a {
        width: 24px;
        height: 24px;
    }

    .navbar-modern .search-input {
        font-size: 0.6rem;
    }

    .navbar-modern .btn-login-modern {
        min-width: 58px;
        padding-inline: 0.35rem;
    }
}

/* Dashboard mobile navbar: clear, compact rows with all primary destinations
   visible without opening a hamburger menu. */
@media (max-width: 768px) {
    #mainNav {
        margin: 0.45rem 0.45rem 0;
        padding: 0 !important;
        border: 1px solid rgba(255, 77, 77, 0.16);
        border-radius: 18px;
        background: rgba(7, 8, 10, 0.96);
        box-shadow: 0 12px 30px rgba(0, 0, 0, 0.3);
    }

    #mainNav > .container-fluid {
        display: grid !important;
        grid-template-columns: minmax(0, 1fr) auto;
        grid-template-areas:
            "brand account"
            "links links";
        gap: 0;
        width: 100%;
        padding: 0.65rem 0.7rem 0.7rem !important;
    }

    #mainNav .navbar-toggler {
        display: none !important;
    }

    #mainNav .navbar-brand-modern {
        grid-area: brand;
        min-width: 0;
        margin: 0;
        font-size: 1rem;
        white-space: nowrap;
    }

    #mainNav .navbar-brand-modern img {
        width: 40px;
        height: 40px;
        margin-right: 0.35rem;
    }

    #mainNav .navbar-collapse,
    #mainNav .navbar-collapse.collapse:not(.show) {
        display: contents !important;
        width: auto;
        height: auto !important;
        min-width: 0;
        visibility: visible !important;
        opacity: 1 !important;
        margin: 0 !important;
        padding: 0 !important;
    }

    #mainNav .navbar-nav {
        grid-area: links;
        display: grid !important;
        grid-template-columns: repeat(3, minmax(0, 1fr));
        width: 100%;
        gap: 0.35rem;
        margin: 0.7rem 0 0 !important;
        padding-top: 0.65rem;
        border-top: 1px solid rgba(255, 255, 255, 0.1);
    }

    #mainNav .nav-item,
    #mainNav .nav-link-modern {
        min-width: 0;
        width: 100%;
    }

    #mainNav .nav-link-modern {
        display: block;
        padding: 0.55rem 0.2rem;
        border-radius: 10px;
        text-align: center;
        font-size: 0.68rem;
        white-space: nowrap;
    }

    #mainNav .nav-link-modern i {
        margin-right: 0.18rem !important;
    }

    #mainNav .user-menu {
        grid-area: account;
        align-self: center;
        justify-self: end;
        min-width: 0;
    }

    #mainNav #authButtonContainer a {
        display: inline-flex;
        align-items: center;
        min-height: 32px;
        padding: 0.35rem 0.65rem !important;
        font-size: 0.7rem !important;
        white-space: nowrap;
    }

    #mainNav .btn-user-modern {
        max-width: 132px;
        padding: 0.3rem 0.4rem;
    }

    #mainNav .user-button-copy {
        max-width: 64px;
        overflow: hidden;
    }
}

@media (max-width: 370px) {
    #mainNav .nav-link-modern {
        font-size: 0.62rem;
    }

    #mainNav .nav-link-modern i {
        display: none;
    }

    #mainNav #authButtonContainer a {
        padding-inline: 0.5rem !important;
    }
}

/* Homepage course tabs: readable, balanced three-button layout on phones. */
@media (max-width: 768px) {
    #courses-section .tabs-header {
        display: grid !important;
        grid-template-columns: repeat(3, minmax(0, 1fr));
        gap: 0.45rem !important;
        width: 100%;
        overflow: visible !important;
        padding: 0 !important;
        margin: 1rem 0 1.25rem !important;
    }

    #courses-section .tab-btn-main {
        display: flex;
        align-items: center;
        justify-content: center;
        gap: 0.3rem;
        width: 100%;
        min-width: 0;
        min-height: 58px;
        padding: 0.55rem 0.3rem !important;
        border-radius: 14px;
        border: 1px solid rgba(255, 255, 255, 0.16);
        background: rgba(20, 22, 30, 0.86);
        color: rgba(255, 255, 255, 0.82);
        font-size: clamp(0.62rem, 2.5vw, 0.75rem) !important;
        font-weight: 700;
        line-height: 1.15;
        text-align: center;
        white-space: normal;
        box-shadow: 0 8px 18px rgba(0, 0, 0, 0.16);
    }

    #courses-section .tab-btn-main i {
        flex: 0 0 auto;
        margin: 0 !important;
        font-size: 1rem;
    }

    #courses-section .tab-btn-main.active {
        color: #fff;
        background: linear-gradient(135deg, #f13e4d, #ff6870);
        border-color: #ff6b72;
        box-shadow: 0 10px 24px rgba(255, 77, 90, 0.3);
    }

    #courses-section .tab-btn-main:focus-visible {
        outline: 3px solid rgba(255, 255, 255, 0.35);
        outline-offset: 2px;
    }
}

@media (max-width: 370px) {
    #courses-section .tabs-header {
        gap: 0.3rem !important;
    }

    #courses-section .tab-btn-main {
        min-height: 54px;
        font-size: 0.58rem !important;
    }

    #courses-section .tab-btn-main i {
        font-size: 0.88rem;
    }
}