:root {
    --csn-height: 70px;
    --csn-height-mobile: 64px;
    /* Frosted glass surface */
    --csn-glass-bg: rgba(255, 255, 255, 0.72);
    --csn-glass-border: rgba(255, 255, 255, 0.45);
    --csn-glass-shadow: 0 8px 32px rgba(15, 23, 42, 0.10), 0 1px 0 rgba(255, 255, 255, 0.6) inset;
    --csn-text: #0f172a;
    --csn-text-muted: #64748b;
    --csn-accent: #347eff;
    --csn-accent-soft: rgba(52, 126, 255, 0.12);
    --csn-pill-bg: rgba(52, 126, 255, 0.10);
    --csn-ease: cubic-bezier(0.22, 1, 0.36, 1);
}



[data-bs-theme="dark"] {
    --csn-glass-bg: rgba(17, 21, 31, 0.70);
    --csn-glass-border: rgba(255, 255, 255, 0.08);
    --csn-glass-shadow: 0 8px 32px rgba(0, 0, 0, 0.45), 0 1px 0 rgba(255, 255, 255, 0.04) inset;
    --csn-text: #f1f5f9;
    --csn-text-muted: #94a3b8;
    --csn-accent: #5b9dff;
    --csn-accent-soft: rgba(91, 157, 255, 0.16);
    --csn-pill-bg: rgba(91, 157, 255, 0.14);
}



.csn-bar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1040; /* sits above Bootstrap navbars (1030) */
    height: var(--csn-height);
    background: var(--csn-glass-bg);
    border-bottom: 1px solid var(--csn-glass-border);
    box-shadow: var(--csn-glass-shadow);
    -webkit-backdrop-filter: blur(18px) saturate(160%);
    backdrop-filter: blur(18px) saturate(160%);
    /* Entry/exit animation: slide down + fade, premium not bouncy */
    transform: translateY(-100%);
    opacity: 0;
    pointer-events: none;
    transition: transform 280ms var(--csn-ease), opacity 220ms var(--csn-ease);
    will-change: transform, opacity;
}

    .csn-bar.csn-visible {
        transform: translateY(0);
        opacity: 1;
        pointer-events: auto;
    }

    /* When JS hasn't decided yet, keep it fully out of the way */
    .csn-bar[hidden] {
        display: none;
    }

@media (prefers-reduced-motion: reduce) {
    .csn-bar {
        transition: opacity 120ms linear;
        transform: none;
    }
}

.csn-inner {
    max-width: 1320px;
    height: 100%;
    margin: 0 auto;
    padding: 0 20px;
    display: flex;
    align-items: center;
    gap: 20px;
}



.csn-brand {
    display: none; /* purely decorative anchor reserved for >=lg */
    flex: 0 0 auto;
}

.csn-brand-dot {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background: var(--csn-accent);
    box-shadow: 0 0 0 4px var(--csn-accent-soft);
}

@media (min-width: 992px) {
    .csn-brand {
        display: inline-flex;
        align-items: center;
    }
}


.csn-nav-scroll-wrap {
    position: relative;
    flex: 1 1 auto;
    min-width: 0;
}

.csn-nav-scroll {
    position: relative;
    overflow-x: auto;
    overflow-y: hidden;
    scrollbar-width: none;
    -ms-overflow-style: none;
    scroll-behavior: smooth;
    -webkit-overflow-scrolling: touch;
}

    .csn-nav-scroll::-webkit-scrollbar {
        display: none;
    }

.csn-nav-list {
    position: relative;
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 4px;
    list-style: none;
    margin: 0;
    padding: 0;
    white-space: nowrap; /* prevents wrapping; mobile scrolls instead */
}

.csn-nav-link {
    position: relative;
    z-index: 1;
    display: inline-flex;
    align-items: center;
    padding: 9px 16px;
    border-radius: 999px;
    font-size: 0.92rem;
    font-weight: 600;
    letter-spacing: 0.005em;
    color: var(--csn-text-muted);
    text-decoration: none;
    white-space: nowrap;
    cursor: pointer;
    transition: color 200ms var(--csn-ease);
    scroll-snap-align: center;
}

    .csn-nav-link:hover {
        color: var(--csn-text);
    }

    .csn-nav-link:focus-visible {
        outline: 2px solid var(--csn-accent);
        outline-offset: 2px;
        border-radius: 999px;
    }

    .csn-nav-link[aria-current="true"] {
        color: var(--csn-accent);
    }


.csn-active-pill {
    position: absolute;
    top: 50%;
    left: 0;
    height: 36px;
    border-radius: 999px;
    background: var(--csn-pill-bg);
    transform: translate(0, -50%);
    transition: transform 280ms var(--csn-ease), width 280ms var(--csn-ease), opacity 200ms var(--csn-ease);
    opacity: 0;
    pointer-events: none;
    z-index: 0;
}

    .csn-active-pill.csn-pill-ready {
        opacity: 1;
    }

@media (prefers-reduced-motion: reduce) {
    .csn-active-pill,
    .csn-nav-link {
        transition: none;
    }
}

/* --------------------------------------------------------------------- */
/* Scroll affordance — edge fade (desktop default: subtle, off unless    */
/* actually scrollable, toggled by JS via csn-fade-start/csn-fade-end)   */
/* --------------------------------------------------------------------- */

.csn-nav-scroll-wrap::before,
.csn-nav-scroll-wrap::after {
    content: "";
    position: absolute;
    top: 0;
    bottom: 0;
    width: 28px;
    pointer-events: none;
    z-index: 2;
    opacity: 0;
    transition: opacity 200ms var(--csn-ease);
}

.csn-nav-scroll-wrap::before {
    left: 0;
    background: linear-gradient(90deg, var(--csn-glass-bg), transparent);
}

.csn-nav-scroll-wrap::after {
    right: 0;
    background: linear-gradient(270deg, var(--csn-glass-bg), transparent);
}

.csn-nav-scroll-wrap.csn-fade-start::before {
    opacity: 1;
}

.csn-nav-scroll-wrap.csn-fade-end::after {
    opacity: 1;
}

.csn-scroll-hint-start,
.csn-scroll-hint-end {
    display: none;
    position: absolute;
    top: 50%;
    width: 16px;
    height: 16px;
    transform: translateY(-50%);
    pointer-events: none;
    z-index: 3;
    color: var(--csn-text-muted);
    opacity: 0;
    transition: opacity 200ms var(--csn-ease);
}

.csn-scroll-hint-start {
    left: 2px;
}

.csn-scroll-hint-end {
    right: 2px;
}

    .csn-scroll-hint-start svg,
    .csn-scroll-hint-end svg {
        width: 100%;
        height: 100%;
    }

@media (prefers-reduced-motion: reduce) {
    .csn-scroll-hint-start svg,
    .csn-scroll-hint-end svg {
        opacity: 0.8;
    }
}


@media (max-width: 767.98px) {
   
    .csn-nav-scroll-wrap::before,
    .csn-nav-scroll-wrap::after {
        width: 22px;
    }

    .csn-nav-scroll-wrap::before {
        background: linear-gradient(90deg, rgba(255, 255, 255, 0.55), transparent);
    }

    .csn-nav-scroll-wrap::after {
        background: linear-gradient(270deg, rgba(255, 255, 255, 0.55), transparent);
    }

    [data-bs-theme="dark"] .csn-nav-scroll-wrap::before {
        background: linear-gradient(90deg, rgba(17, 21, 31, 0.55), transparent);
    }

    [data-bs-theme="dark"] .csn-nav-scroll-wrap::after {
        background: linear-gradient(270deg, rgba(17, 21, 31, 0.55), transparent);
    }

    /* Breathing room so the first/last pill never sits directly under
       the fade or the chevron at rest */
    .csn-nav-list {
        padding-inline: 22px;
    }

    /* Turn the chevrons on for touch-sized viewports only, and only when
       there's actually more content to scroll toward in that direction */
    .csn-scroll-hint-start,
    .csn-scroll-hint-end {
        display: flex;
        align-items: center;
        justify-content: center;
    }

    .csn-nav-scroll-wrap.csn-fade-start .csn-scroll-hint-start {
        opacity: 1;
    }

    .csn-nav-scroll-wrap.csn-fade-end .csn-scroll-hint-end {
        opacity: 1;
    }
}

@media (max-width: 575.98px) {
    .csn-bar {
        height: var(--csn-height-mobile);
    }

    .csn-inner {
        padding: 0 12px;
        gap: 10px;
    }

    .csn-nav-link {
        padding: 8px 13px;
        font-size: 0.85rem;
    }

    .csn-nav-list {
        padding-inline: 18px;
    }

    .csn-nav-scroll-wrap::before,
    .csn-nav-scroll-wrap::after {
        width: 18px;
    }

    .csn-scroll-hint-start,
    .csn-scroll-hint-end {
        width: 14px;
        height: 14px;
    }

    .csn-enroll-btn {
        padding: 9px 16px;
        font-size: 0.85rem;
    }

        .csn-enroll-btn span {
            display: none;
        }
        /* icon-only enroll on very small screens */
        .csn-enroll-btn svg {
            width: 18px;
            height: 18px;
        }
}


.csn-header-hide {
    transform: translateY(-100%);
    opacity: 0;
    transition: transform 280ms var(--csn-ease), opacity 220ms var(--csn-ease);
    pointer-events: none;
}

.csn-header-show {
    transform: translateY(0);
    opacity: 1;
    transition: transform 280ms var(--csn-ease), opacity 220ms var(--csn-ease);
}

@media (prefers-reduced-motion: reduce) {
    .csn-header-hide,
    .csn-header-show {
        transition: opacity 120ms linear;
        transform: none;
    }
}

/* Prevent a layout jump: reserve the sticky bar's height as top padding
   on <body> only while course mode is active, so content doesn't hop
   when the fixed bar appears over it. */
body.csn-mode-active {
    scroll-padding-top: calc(var(--csn-height) + 12px);
}

@media (max-width: 575.98px) {
    body.csn-mode-active {
        scroll-padding-top: calc(var(--csn-height-mobile) + 12px);
    }
}

@media (min-width:768px) {
    body.csn-mode-active {
        min-height: 100vh;
        padding-bottom: 150px !important;
        position: relative;
    }
}

.csn-logo-img {
    width: 3rem;
    height: 3rem;
}

@media (min-width: 990px) {
    .csn-logo-img {
        width: 2.5rem;
        height: 2.5rem;
    }
}

@media (max-width: 575.98px) {
    .csn-logo-img {
        width: 2rem;
        height: 2rem;
    }
}

.bydnt {
    font-size: 10px;
    padding-left: 62px;
    margin-top: -8px !important;
    font-weight: 500;
    font-family: arial;
    letter-spacing: 0.12em;
    color: black;
}

/* ===================== STICKY NAV DOWNLOAD CTA ===================== */

.csn-bar .dl-cta {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    cursor: pointer;
    text-decoration: none;
    padding: 8px 8px;
    border-radius: 24px;
    color: #fff;
    font: 700 .7rem 'Sora','Inter',sans-serif;
    letter-spacing: .01em;
    background: linear-gradient(135deg,#06b6d4,#7c3aed);
    box-shadow: 0 8px 20px -6px rgba(8,145,178,.5);
    transition: transform .25s ease, box-shadow .25s ease, filter .25s ease;
    animation: dl-pulse 2.6s ease-in-out infinite;
    flex: none;
    white-space: nowrap;
}

    .csn-bar .dl-cta:hover {
        transform: translateY(-2px);
        filter: brightness(1.04);
        box-shadow: 0 14px 28px -8px rgba(124,58,237,.55);
        color: #fff;
        animation: none;
    }

    .csn-bar .dl-cta:active {
        transform: translateY(0);
    }

.csn-bar .dl-cta-ic {
    width: 15px;
    height: 15px;
    background: #fff;
    flex: none;
    -webkit-mask: center/contain no-repeat var(--dl-i);
    mask: center/contain no-repeat var(--dl-i);
    --dl-i: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%23000' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='M21 15v4a2 2 0 0 1-2 2H5a2 2 0 0 1-2-2v-4'/%3E%3Cpolyline points='7 10 12 15 17 10'/%3E%3Cline x1='12' x2='12' y1='15' y2='3'/%3E%3C/svg%3E");
    animation: dl-bob 1.5s ease-in-out infinite;
}

.csn-bar .dl-cta:hover .dl-cta-ic {
    animation-duration: .85s;
}

@keyframes dl-bob {
    0%,100% {
        transform: translateY(-1.5px);
    }

    50% {
        transform: translateY(2.5px);
    }
}

@keyframes dl-pulse {
    0%,100% {
        box-shadow: 0 8px 20px -6px rgba(8,145,178,.42);
    }

    50% {
        box-shadow: 0 11px 26px -4px rgba(124,58,237,.5);
    }
}

[data-bs-theme="dark"] .csn-bar .dl-cta {
    box-shadow: 0 8px 20px -6px rgba(34,211,228,.4);
}


@media (max-width: 575.98px) {
    .csn-bar .menu_query {
        flex: none;
    }

    .csn-bar .dl-cta {
        padding: 9px;
        width: 36px;
        height: 36px;
        gap: 0;
        justify-content: center;
        border-radius: 50%;
    }

        .csn-bar .dl-cta .dl-cta-label {
            position: absolute;
            width: 1px;
            height: 1px;
            overflow: hidden;
            clip: rect(0 0 0 0);
            white-space: nowrap;
        }

    .csn-bar .dl-cta-ic {
        width: 16px;
        height: 16px;
    }
}

@media (min-width: 576px) and (max-width: 767.98px) {
    .csn-bar .dl-cta {
        padding: 7px 12px;
        font-size: .68rem;
    }
}

@media (prefers-reduced-motion:reduce) {
    .csn-bar .dl-cta,
    .csn-bar .dl-cta-ic {
        animation: none;
    }
}