:root {
    --navy: #001433;
    --ink: #0b1b33;
    --paper: rgba(255,255,255,.92);
    --line: rgba(13,42,76,.12);
    --focus: #9fd0ff;
    --shadow: 0 12px 28px rgba(2,16,36,.10);
    --shadow-strong: 0 24px 60px rgba(2,16,36,.14);
}

.navbar-premium {
    background: var(--paper);
    backdrop-filter: blur(14px);
    border-bottom: 1px solid var(--line);
    box-shadow: var(--shadow);
    padding-block: .65rem;
    z-index: 1030
}

    .navbar-premium::before {
        content: "";
        position: fixed;
        inset: 0 0 auto 0;
        height: 2px;
        z-index: 1031;
        background: linear-gradient(90deg,transparent,#a7d0ff 20%,#9ff3ff 50%,#a7d0ff 80%,transparent);
        opacity: .5;
        pointer-events: none
    }

    .navbar-premium.navbar-compact {
        padding-block: .4rem;
        box-shadow: var(--shadow-strong)
    }

.brand-logo {
    max-height: 44px;
    width: auto
}

.brand-wordmark {
    font-weight: 800;
    font-size: 1.35rem;
    color: var(--navy);
    letter-spacing: .2px
}

.navbar-premium .nav-link {
    color: var(--navy);
    font-weight: 650;
    position: relative;
    padding: .6rem .4rem;
    line-height: 1.1
}

.link-underline::after {
    content: "";
    position: absolute;
    left: 0;
    right: 0;
    bottom: .25rem;
    height: 2px;
    background: linear-gradient(90deg,var(--navy),#9fb3c8);
    transform: scaleX(0);
    transform-origin: left;
    transition: transform .2s ease
}

.link-underline:is(:hover,:focus)::after {
    transform: scaleX(1)
}

.navbar-premium .nav-link.is-active::after {
    transform: scaleX(1);
    height: 3px
}

.dropdown-toggle::after {
    display: none
}

/* Mega */
.dropdown-mega .dropdown-menu.mega {
    width: 100%;
    border-radius: 16px;
    margin-top: .7rem;
    overflow: hidden;
    background: radial-gradient(1200px 220px at 50% -60%, #eef5ff, transparent), radial-gradient(1200px 320px at 50% -120%, #f8fbff, transparent), rgba(255,255,255,.98);
    backdrop-filter: blur(16px);
    box-shadow: var(--shadow-strong);
    opacity: 0;
    transform: translateY(8px);
    transition: opacity .18s ease, transform .18s ease;
    pointer-events: none;
}

.dropdown-menu.show.mega {
    opacity: 1;
    transform: translateY(0);
    pointer-events: auto
}

.mega-grid-2 {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: clamp(.75rem,2vw,1.25rem)
}

.mega-title {
    font-size: .82rem;
    text-transform: uppercase;
    letter-spacing: .12em;
    color: #6c757d;
    margin: 0 0 .35rem
}

.mega-list {
    list-style: none;
    margin: 0;
    padding: 0
}

.mega-link {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    padding: .55rem .7rem;
    border-radius: 10px;
    text-decoration: none;
    color: var(--ink);
    font-weight: 600;
    min-height: 40px;
    transition: transform .12s, background .12s, color .12s, opacity .2s
}

    .mega-link:hover {
        background: #f4f8ff;
        color: var(--navy)
    }

/* Entrance animations */
.dropdown-menu.mega .mega-col-left, .dropdown-menu.mega .mega-col-right {
    opacity: 0;
    transform: translateX(0)
}

.dropdown-menu.mega.animate-in .mega-col-left {
    animation: slideInLeft .28s ease-out forwards
}

.dropdown-menu.mega.animate-in .mega-col-right {
    animation: slideInRight .28s ease-out .06s forwards
}

.dropdown-menu.mega.animate-in .mega-link {
    opacity: 0
}

.dropdown-menu.mega.animate-in .mega-col-left .mega-link {
    animation: fadeRise .24s ease-out forwards
}

.dropdown-menu.mega.animate-in .mega-col-right .mega-link {
    animation: fadeRise .24s ease-out .04s forwards
}

.dropdown-menu.mega.animate-in .mega-link:nth-child(2) {
    animation-delay: .06s
}

.dropdown-menu.mega.animate-in .mega-link:nth-child(3) {
    animation-delay: .12s
}

.dropdown-menu.mega.animate-in .mega-link:nth-child(4) {
    animation-delay: .18s
}

@keyframes slideInLeft {
    from {
        opacity: 0;
        transform: translateX(-10px)
    }

    to {
        opacity: 1;
        transform: none
    }
}

@keyframes slideInRight {
    from {
        opacity: 0;
        transform: translateX(10px)
    }

    to {
        opacity: 1;
        transform: none
    }
}

@keyframes fadeRise {
    from {
        opacity: 0;
        transform: translateY(4px)
    }

    to {
        opacity: 1;
        transform: none
    }
}

/* CTA */
.btn-cta {
    background: linear-gradient(90deg,#001433,#3a7bd5);
    border: 0;
    color: #fff;
    font-weight: 800;
    letter-spacing: .2px;
    padding: .55rem 1rem;
    border-radius: 999px;
    box-shadow: 0 6px 20px rgba(9,32,77,.16);
    transition: transform .12s, box-shadow .12s;
}

    .btn-cta:hover {
        transform: translateY(-1px);
        box-shadow: 0 10px 26px rgba(9,32,77,.2)
    }

/* Focus ring */
:focus-visible {
    outline: 3px solid var(--focus);
    outline-offset: 2px;
    border-radius: 6px
}

/* Mobile */
@media (max-width:1199.98px) {
    .brand-logo {
        max-height: 40px
    }

    .dropdown-mega .dropdown-menu.mega {
        position: static;
        transform: none;
        box-shadow: none;
        backdrop-filter: none;
        background: transparent;
        opacity: 1;
        pointer-events: auto;
        padding: .25rem 0;
        margin-top: .25rem;
    }

    .mega-grid-2 {
        grid-template-columns: 1fr;
        gap: .25rem
    }
}

/* Improve contrast on dark backgrounds (optional dark header on scroll if desired) */
.navbar-premium.navbar-compact .nav-link {
    color: #0a2442
}