/* GLOBAL CSS VARIABLES (Data Analyst Theme) */
:root {
    --brand: #0d6efd;
    /* Bootstrap primary */
    --ink: #0f172a;
    /* deep slate */
    --soft: #64748b;
    /* muted */
    --accent: #22c55e;
    /* green */
    --bg: #0b1020;
    /* hero dark */
    --card: #ffffff;
    /* card */
}

html {
    scroll-behavior: smooth;
    overflow-x: hidden;
}

body {
    color: var(--ink);
    font-family: 'Inter', sans-serif;
    /* Keep Inter as base for readability */
}

/* Typography Overrides */
h1,
h2,
h3,
h4,
h5,
h6 {
    font-family: 'Poppins', sans-serif;
}

/* NAV */
.navbar-blur {
    backdrop-filter: saturate(180%) blur(8px);
    background-color: rgba(255, 255, 255, .8);
    transition: background-color 0.3s ease, padding 0.3s ease;
}

.navbar-blur.scrolled {
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.05);
    background-color: rgba(255, 255, 255, .95);
    padding: 0.5rem 0;
}

.navbar-brand img {
    height: 50px;
    width: auto;
    transition: all 0.3s ease;
}

.navbar-blur.scrolled .navbar-brand img {
    height: 40px;
}

.mega-nav .nav-link {
    color: var(--ink);
    font-weight: 600;
}

.mega-nav .nav-link:hover,
.mega-nav .nav-link:focus {
    color: var(--brand);
}

.mega-nav .mega-item {
    position: static;
}

.mega-nav .mega-toggle {
    display: inline-flex;
    align-items: center;
    gap: .35rem;
}

.mega-nav .mega-menu {
    border: 0;
    border-radius: 24px;
    padding: 0;
    overflow: hidden;
    box-shadow: 0 30px 70px rgba(15, 23, 42, .16);
    background: rgba(255, 255, 255, .98);
}

.mega-nav .mega-shell {
    display: grid;
    grid-template-columns: 280px minmax(0, 1fr);
    min-width: min(960px, calc(100vw - 2rem));
}

.mega-nav .mega-intro {
    padding: 1.5rem;
    color: #fff;
    background:
        radial-gradient(620px 260px at -10% -10%, rgba(96, 165, 250, .44), transparent 62%),
        radial-gradient(420px 220px at 110% 12%, rgba(52, 211, 153, .26), transparent 58%),
        linear-gradient(180deg, #081120 0%, #0f172a 100%);
}

.mega-nav .mega-kicker {
    margin: 0 0 .5rem;
    font-size: .74rem;
    font-weight: 800;
    text-transform: uppercase;
    letter-spacing: .16em;
    color: rgba(255, 255, 255, .72);
}

.mega-nav .mega-intro h6 {
    margin: 0 0 .55rem;
    font-size: 1.14rem;
    font-weight: 800;
}

.mega-nav .mega-intro p {
    margin: 0 0 1rem;
    font-size: .93rem;
    line-height: 1.55;
    color: rgba(255, 255, 255, .82);
}

.mega-nav .mega-intro .btn {
    border-radius: 999px;
    font-weight: 700;
}

.mega-nav .mega-grid {
    display: grid;
    gap: 1rem;
    padding: 1.4rem;
    background: linear-gradient(180deg, #f8fafc 0%, #ffffff 100%);
}

.mega-nav .schools-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
}

.mega-nav .courses-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
}

.mega-nav .mega-link-card {
    display: block;
    border-radius: 18px;
    padding: 1rem 1.05rem;
    text-decoration: none;
    color: var(--ink);
    background: #fff;
    border: 1px solid rgba(148, 163, 184, .18);
    box-shadow: 0 10px 24px rgba(15, 23, 42, .06);
    transition: transform 0.18s ease, box-shadow 0.18s ease, border-color 0.18s ease;
}

.mega-nav .mega-link-card:hover {
    transform: translateY(-2px);
    box-shadow: 0 18px 38px rgba(15, 23, 42, .1);
    border-color: rgba(13, 110, 253, .28);
}

.mega-nav .mega-link-card strong {
    display: flex;
    align-items: center;
    gap: .55rem;
    margin-bottom: .35rem;
    font-size: .98rem;
    font-weight: 800;
}

.mega-nav .mega-link-card i {
    font-size: 1rem;
}

.mega-nav .mega-link-card span {
    display: block;
    color: var(--soft);
    font-size: .86rem;
    line-height: 1.45;
}

.mega-nav .mega-list {
    display: grid;
    gap: .7rem;
}

.mega-nav .mega-list-title {
    margin: 0;
    font-size: .76rem;
    font-weight: 800;
    text-transform: uppercase;
    letter-spacing: .14em;
    color: var(--soft);
}

.mega-nav .mega-list a {
    display: block;
    text-decoration: none;
    color: var(--ink);
    font-size: .95rem;
    font-weight: 700;
    line-height: 1.3;
}

.mega-nav .mega-list a:hover {
    color: var(--brand);
}

.mega-nav .mega-list small {
    display: block;
    margin-top: .12rem;
    color: var(--soft);
    font-size: .81rem;
    font-weight: 500;
}

@media (max-width: 991.98px) {
    .navbar-brand img {
        height: 40px;
    }

    .mega-nav .mega-menu {
        border-radius: 18px;
        box-shadow: none;
        border: 1px solid rgba(148, 163, 184, .18);
    }

    .mega-nav .mega-shell,
    .mega-nav .schools-grid,
    .mega-nav .courses-grid {
        grid-template-columns: 1fr;
        min-width: 0;
    }
}

@media (min-width: 992px) {
    .mega-nav .mega-item .dropdown-menu {
        top: 100%;
        left: 50%;
        display: block;
        margin-top: 0;
        opacity: 0;
        visibility: hidden;
        pointer-events: none;
        transform: translateX(-50%);
        transition: opacity .18s ease, visibility .18s ease;
    }

    .mega-nav .mega-item>.mega-toggle {
        position: relative;
        z-index: 1001;
    }

    .mega-nav .mega-item>.mega-toggle::before {
        content: "";
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        height: 1rem;
    }

    .mega-nav .mega-item:hover .dropdown-menu,
    .mega-nav .mega-item:focus-within .dropdown-menu,
    .mega-nav .mega-item .dropdown-menu:hover {
        opacity: 1;
        visibility: visible;
        pointer-events: auto;
    }
}

/* HERO & SCHOOL HERO */
.hero,
.hero-school {
    position: relative;
    overflow: hidden;
    color: #fff;
    background: radial-gradient(1200px 600px at 10% -10%, rgba(13, 110, 253, .35), transparent 60%),
        radial-gradient(900px 500px at 90% 10%, rgba(34, 197, 94, .25), transparent 60%),
        linear-gradient(180deg, #0b1020 0%, #0b1020 70%, #0d1117 100%);
    padding-top: 160px;
    /* Space for fixed nav */
    padding-bottom: 80px;
}

/* ORBS */
.hero .orb,
.hero-school .orb {
    position: absolute;
    filter: blur(60px);
    opacity: .65;
    border-radius: 50%;
    z-index: 0;
    pointer-events: none;
}

.orb.one {
    width: 320px;
    height: 320px;
    background: #60a5fa;
    top: -60px;
    left: -60px;
}

.orb.two {
    width: 380px;
    height: 380px;
    background: #34d399;
    right: -80px;
    top: 40px;
}

/* REVEAL on scroll (IntersectionObserver target) */
.reveal {
    opacity: 0;
    transform: translateY(24px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

.reveal.visible {
    opacity: 1;
    transform: none;
}

/* HOVERS & CARDS */
.card-hover {
    transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.card-hover:hover {
    transform: translateY(-4px);
    box-shadow: 0 14px 30px rgba(2, 6, 23, .12);
}

.shadow-soft {
    box-shadow: 0 10px 24px rgba(2, 6, 23, .08);
}

/* PROGRESS BARS animate on reveal */
.progress {
    height: 8px;
    background: #e9ecef;
}

.progress-bar {
    width: 0%;
    transition: width 1.2s ease;
}

.progress-bar.run {
    width: var(--w);
}

/* SECTION SPACING */
section {
    padding: 72px 0;
}

.section-heading span {
    letter-spacing: .08em;
    font-weight: 600;
    color: var(--soft);
    text-transform: uppercase;
    font-size: .8rem;
}

/* CUSTOM COURSE TABS */
.custom-course-tabs {
    -ms-overflow-style: none;
    /* IE and Edge */
    scrollbar-width: none;
    /* Firefox */
}

.custom-course-tabs::-webkit-scrollbar {
    display: none;
    /* Chrome, Safari and Opera */
}

.custom-course-tabs .nav-link {
    color: var(--soft);
    background-color: transparent;
    border-color: #dee2e6 !important;
    transition: all 0.3s ease;
}

.custom-course-tabs .nav-link:hover {
    background-color: #f8f9fa;
    color: var(--ink);
}

.custom-course-tabs .nav-link.active {
    background-color: var(--brand) !important;
    color: #fff !important;
    border-color: var(--brand) !important;
}

/* UTILITIES */
.badge-soft {
    background: rgba(255, 255, 255, .15);
    border: 1px solid rgba(255, 255, 255, .2);
}

/* FOOTER */
footer {
    position: relative;
    overflow: hidden;
    color: #f8f9fa;
    background: #0d1117;
}

footer::before {
    content: "";
    position: absolute;
    inset: -20%;
    z-index: 0;
    background:
        radial-gradient(600px 300px at var(--x, 18%) 25%, rgba(13, 110, 253, 0.28), transparent 60%),
        radial-gradient(520px 260px at calc(100% - var(--x, 18%)) 75%, rgba(34, 197, 94, 0.22), transparent 60%),
        linear-gradient(180deg, #0b1020 0%, #0d1117 100%);
    filter: blur(18px);
    animation: footerGlow 14s ease-in-out infinite alternate;
}

@keyframes footerGlow {
    0% {
        --x: 18%;
    }

    50% {
        --x: 52%;
    }

    100% {
        --x: 82%;
    }
}

footer .container {
    position: relative;
    z-index: 1;
}

footer a {
    color: #f8f9fa;
    text-decoration: none;
}

footer a:hover {
    text-decoration: underline;
}

.footer-logos img {
    height: 72px;
    width: auto;
    object-fit: contain;
    filter: grayscale(0);
    transition: transform 0.25s;
}

.footer-logos img:hover {
    transform: scale(1.06);
}

@media (max-width: 575.98px) {
    .display-4 {
        font-size: 2.15rem;
    }

    .display-5 {
        font-size: 1.85rem;
    }
}

/* PARTNERS LOGO SCROLL */
.partners-scroll {
    overflow: hidden;
    padding: 20px 0;
    background: #fff;
    white-space: nowrap;
    position: relative;
    width: 100%;
}

.partners-scroll-inner {
    display: flex;
    align-items: center;
    width: max-content;
    animation: scroll 40s linear infinite;
}

.partners-scroll-inner img {
    height: 50px;
    width: auto;
    margin: 0 40px;
    object-fit: contain;
    filter: grayscale(100%);
    opacity: 0.6;
    transition: all 0.3s ease;
}

.partners-scroll-inner img:hover {
    filter: grayscale(0%);
    opacity: 1;
    transform: scale(1.1);
}

@keyframes scroll {
    0% {
        transform: translateX(0);
    }

    100% {
        transform: translateX(-50%);
    }
}

/* Pause animation on hover */
.partners-scroll:hover .partners-scroll-inner {
    animation-play-state: paused;
}