:root {
    --logo-blue-dark: #003679;
    --logo-blue-light: #0072ce;
    --logo-orange: #e03a11;
    --logo-yellow: #f1ab00;
    --text-navy: #1e293b;
    --text-muted: #64748b;
    --border-grey: #e2e8f0;
}

.nav-mega-item {
    position: relative;
    display: flex;
    align-items: center;
}

button.mega-trigger {
    appearance: none;
    -webkit-appearance: none;
    color: var(--text-navy);
    background: transparent;
    border: 0;
    border-radius: 0;
    display: inline-flex;
    align-items: center;
    gap: 7px;
    margin: 0 1rem;
    padding: 0 0 4px;
    font: inherit;
    font-size: 0.95rem;
    font-weight: 700;
    line-height: 1.2;
    cursor: pointer;
    position: relative;
}

button.mega-trigger::after {
    content: '';
    position: absolute;
    width: 0;
    height: 2px;
    bottom: 0;
    left: 0;
    background-color: var(--logo-orange);
    transition: width 0.3s ease;
}

.nav-mega-item:hover button.mega-trigger::after,
.nav-mega-item:focus-within button.mega-trigger::after {
    width: 100%;
}

button.mega-trigger i {
    color: var(--logo-orange);
    font-size: 0.75rem;
    transition: transform 0.2s ease;
}

.nav-mega-item:hover button.mega-trigger i,
.nav-mega-item:focus-within button.mega-trigger i {
    transform: rotate(180deg);
}

.mega-menu {
    position: absolute !important;
    top: calc(100% + 20px);
    left: 50%;
    width: min(1040px, calc(100vw - 42px));
    display: grid !important;
    grid-template-columns: 1.1fr 1fr 1.1fr 1.2fr;
    gap: 18px;
    padding: 18px;
    background: #ffffff;
    border: 1px solid var(--border-grey);
    border-top: 4px solid var(--logo-orange);
    border-radius: 0 0 10px 10px;
    box-shadow: 0 24px 50px rgba(15, 23, 42, 0.16);
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
    transform: translateX(-50%) translateY(10px);
    transition: opacity 0.2s ease, transform 0.2s ease, visibility 0.2s ease;
    z-index: 1100;
}

.nav-mega-item:hover .mega-menu,
.nav-mega-item:focus-within .mega-menu,
.nav-mega-item.is-open .mega-menu {
    opacity: 1;
    visibility: visible;
    pointer-events: auto;
    transform: translateX(-50%) translateY(0);
}

.mega-feature-card {
    min-height: 260px;
    border-radius: 8px;
    overflow: hidden;
    position: relative;
    display: flex;
    align-items: flex-end;
    color: #ffffff;
    background: var(--logo-blue-dark);
}

.mega-feature-card img {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.mega-feature-card::after {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(180deg, rgba(0, 54, 121, 0.08), rgba(0, 25, 58, 0.84));
}

.mega-feature-card div {
    position: relative;
    z-index: 1;
    padding: 20px;
}

.mega-feature-card span,
.mega-links-panel h4 {
    color: var(--logo-yellow);
    display: block;
    font-size: 0.78rem;
    font-weight: 800;
    letter-spacing: 1px;
    margin-bottom: 8px;
    text-transform: uppercase;
}

.mega-feature-card h3 {
    color: #ffffff;
    font-size: 1.35rem;
    margin-bottom: 6px;
}

.mega-feature-card p {
    color: rgba(255, 255, 255, 0.9);
    font-size: 0.88rem;
    line-height: 1.45;
}

.mega-links-panel {
    display: flex;
    flex-direction: column;
    align-items: stretch;
    gap: 5px;
    padding: 4px 0;
}

.mega-links-panel h4 {
    color: var(--logo-blue-dark);
    margin-bottom: 6px;
}

.nav-links .mega-links-panel a {
    width: 100%;
    margin: 0;
    padding: 8px 10px;
    border-radius: 6px;
    color: var(--text-navy);
    font-size: 0.9rem;
    font-weight: 650;
    line-height: 1.2;
    text-decoration: none;
}

.nav-links .mega-links-panel a::after {
    display: none;
}

.nav-links .mega-links-panel a:hover {
    background: #eff6ff;
    color: var(--logo-blue-dark);
}

.mega-links-panel.two-column {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    align-content: start;
    column-gap: 8px;
}

.mega-links-panel.two-column h4 {
    grid-column: 1 / -1;
}

@media (max-width: 992px) {
    .nav-mega-item {
        display: block;
        width: 100%;
    }

    button.mega-trigger {
        width: 100%;
        justify-content: space-between;
        margin: 0.6rem 0;
        padding: 0 0 4px;
    }

    button.mega-trigger::after {
        display: none;
    }

    button.mega-trigger i {
        transform: rotate(180deg);
    }

    .mega-menu {
        position: static !important;
        width: 100%;
        display: none !important;
        grid-template-columns: 1fr;
        gap: 12px;
        margin: 0.4rem 0 0.8rem;
        padding: 12px;
        border: 1px solid var(--border-grey);
        border-left: 4px solid var(--logo-orange);
        border-top: 1px solid var(--border-grey);
        border-radius: 8px;
        box-shadow: none;
        opacity: 1;
        visibility: visible;
        pointer-events: auto;
        transform: none;
    }

    .nav-mega-item.is-open .mega-menu {
        display: grid !important;
    }

    .mega-feature-card {
        min-height: 150px;
    }

    .mega-feature-card div {
        padding: 15px;
    }

    .mega-links-panel.two-column {
        grid-template-columns: 1fr;
    }

    .nav-links .mega-links-panel a {
        margin: 0;
        padding: 9px 10px;
    }
}