/* --- CSS Variables and Global Styles --- */
:root {
    --color-primary: #006ADC;
    --color-primary-dark: #0056B3;
    --color-gray-900: #101828;
    --color-gray-700: #344054;
    --color-gray-600: #475467;
    --color-gray-500: #667085;
    --color-gray-300: #D0D5DD;
    --color-gray-200: #EAECF0;
    --color-gray-100: #F2F4F7;
    --color-gray-50: #F9FAFB;
    --color-white: #FFFFFF;

    /* REFINED: Accent colors for mega menu */
    --color-gradient-start: #0056B3;
    --color-gradient-end: #461FAF;
    --color-text-on-gradient: #FFFFFF;
    --color-text-on-gradient-muted: rgba(230, 230, 255, 0.85); /* Brighter for better contrast */
    --color-text-on-gradient-heading: rgba(200, 200, 255, 0.8); /* Brighter for better contrast */

    --header-height: 73px;
    --transition-fast: 0.2s ease;
    --transition-smooth: 0.3s ease-in-out;
}

/* --- Header & Navbar --- */
.navbar {
    background: var(--color-white);
    padding: 0;
    border-bottom: 1px solid var(--color-gray-200);
    position: sticky;
    top: 0;
    z-index: 1000;
    height: var(--header-height);
}

.navbar-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 100%;
    width: 90%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 15px;
}

.navbar .logo img {
    max-height: 36px;
    display: block;
}

.nav-links-container {
    display: flex;
    align-items: center;
    gap: 24px;
    height: 100%;
}

.navbar-links {
    list-style: none;
    margin: 0;
    padding: 0;
    display: flex;
    align-items: center;
    gap: 4px;
    height: 100%;
}

.nav-item, .nav-item-dropdown {
    display: flex;
    align-items: center;
    height: 100%;
}

.navbar-links .nav-link {
    color: var(--color-gray-600);
    font-weight: 600;
    font-size: 1rem;
    padding: 8px 12px;
    display: flex;
    align-items: center;
    gap: 6px;
    border-radius: 6px;
    transition: var(--transition-fast);
    text-decoration: none;
    white-space: nowrap;
    cursor: pointer;
}

.navbar-links .nav-link:hover,
.nav-item-dropdown.open > .nav-link {
    background: var(--color-gray-50);
    color: var(--color-gray-900);
}

.arrow-down {
    color: var(--color-gray-600);
    transition: transform var(--transition-smooth);
    width: 16px; 
    height: 16px;
}

.nav-item-dropdown.open .arrow-down {
    transform: rotate(180deg);
}

/* --- Action Buttons --- */
.nav-actions {
    display: flex;
    align-items: center;
    gap: 12px;
}
.nav-button {
    padding: 10px 18px;
    border-radius: 8px;
    font-weight: 600;
    font-size: 1rem;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border: 1px solid transparent;
    cursor: pointer;
    text-decoration: none;
    transition: all var(--transition-fast);
    white-space: nowrap;
}
.nav-button-secondary {
    color: var(--color-gray-700);
    background: var(--color-white);
    border-color: var(--color-gray-300);
    box-shadow: 0 1px 2px rgba(16, 24, 40, .05);
}
.nav-button-secondary:hover {
    background: var(--color-gray-50);
    color: var(--color-gray-900);
}
.nav-button-primary {
    background: var(--color-primary);
    color: var(--color-white);
    border-color: var(--color-primary);
    box-shadow: 0 1px 2px rgba(16, 24, 40, .05);
}
.nav-button-primary:hover {
    background: var(--color-primary-dark);
    border-color: var(--color-primary-dark);
    transform: translateY(-1px);
    color: var(--color-white);
}

/* --- Mega Menu --- */
.mega-menu {
    display: block;
    position: absolute;
    top: 100%;
    left: 0;
    width: 100%;
    background: var(--color-white);
    border-top: 1px solid var(--color-gray-200);
    box-shadow: 0 8px 16px -4px rgba(16, 24, 40, .04);
    opacity: 0;
    visibility: hidden;
    transform: translateY(10px);
    pointer-events: none;
    transition: opacity var(--transition-smooth), transform var(--transition-smooth), visibility var(--transition-smooth);
    z-index: 1010;
}
.nav-item-dropdown.open > .mega-menu {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
    pointer-events: auto;
}
.mega-menu-container {
    width: 90%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 40px 15px;
}
.mega-menu-grid { display: grid; grid-template-columns: 1.2fr 1fr 1.2fr; gap: 32px; }
.mega-menu-grid-simple { display: grid; grid-template-columns: repeat(2, 1fr); gap: 16px; }

/* Item styles reset for mobile first approach */
.mega-menu-heading { font-size: 0.875rem; font-weight: 600; color: var(--color-gray-500); text-transform: uppercase; letter-spacing: 0.5px; margin: 0 0 12px 0; padding: 0 12px; }
.mega-menu-item { display: flex; align-items: flex-start; gap: 16px; padding: 12px; border-radius: 8px; text-decoration: none; transition: background-color var(--transition-fast); }
.mega-menu-item:hover { background-color: var(--color-gray-50); }
.mega-menu-icon { flex-shrink: 0; width: 20px; height: 20px; color: var(--color-primary); margin-top: 2px; }
.mega-menu-content p { margin: 0; line-height: 1.4; }
.mega-menu-title { font-weight: 600; color: var(--color-gray-900); }
.mega-menu-description { font-size: 0.875rem; color: var(--color-gray-600); }
.mega-menu-item-simple { display: block; padding: 8px 12px; color: var(--color-gray-600); font-weight: 500; border-radius: 6px; text-decoration: none; transition: var(--transition-fast); }
.mega-menu-item-simple:hover { background-color: var(--color-gray-50); color: var(--color-gray-900); }
.mega-menu-column-featured { background: var(--color-gray-50); border-radius: 12px; padding: 24px; }
/* ... (rest of old styles are overridden for desktop below) */

.mega-menu-overlay { display: none; }

/* --- Mobile Navigation --- */
.mobile-menu-toggle { display: none; background: none; border: none; cursor: pointer; z-index: 1002; color: var(--color-gray-700); }
.mobile-menu-toggle .icon-menu { display: block; }
.mobile-menu-toggle .icon-close { display: none; }

/* --- Desktop Styles --- */
@media (min-width: 992px) {
    .mega-menu-overlay { display: block; position: fixed; top: var(--header-height); left: 0; width: 100vw; height: calc(100vh - var(--header-height)); background-color: rgba(16, 24, 40, 0.4); z-index: 999; opacity: 0; visibility: hidden; transition: opacity var(--transition-smooth), visibility var(--transition-smooth); }
    .navbar.mega-menu-active .mega-menu-overlay { opacity: 1; visibility: visible; }

    /* REFINED: Premium Mega Menu Theme */
    .mega-menu {
        background: linear-gradient(105deg, var(--color-gradient-start) 0%, var(--color-gradient-end) 100%);
        border-top: none;
    }
    
    .mega-menu-column {
        background: rgba(255, 255, 255, 0.1);
        border: 1px solid rgba(255, 255, 255, 0.2);
        backdrop-filter: blur(12px);
        -webkit-backdrop-filter: blur(12px);
        border-radius: 12px;
        padding: 16px;
    }
    
    .mega-menu-heading {
        color: var(--color-text-on-gradient-heading);
        padding: 8px 16px 12px;
        margin-bottom: 0;
    }

    .mega-menu-item {
        background: transparent;
        padding: 16px;
        margin: 0;
        border-radius: 0;
        border-bottom: 1px solid rgba(255, 255, 255, 0.15);
        transition: background-color var(--transition-fast), color var(--transition-fast);
    }
     .mega-menu-column > a.mega-menu-item:first-of-type {
        border-top-left-radius: 8px;
        border-top-right-radius: 8px;
    }
     .mega-menu-column > a.mega-menu-item:last-of-type {
        border-bottom: none;
        border-bottom-left-radius: 8px;
        border-bottom-right-radius: 8px;
    }

    .mega-menu-item-simple {
        background: transparent;
        color: var(--color-text-on-gradient-muted);
        padding: 10px 16px;
        border-radius: 6px;
    }
    .mega-menu-item:hover, .mega-menu-item-simple:hover {
        background: rgba(255, 255, 255, 0.2);
        color: var(--color-text-on-gradient);
    }
    .mega-menu-item:hover .mega-menu-icon, .mega-menu-item:hover .mega-menu-title {
        color: var(--color-text-on-gradient);
    }
    .mega-menu-item:hover .mega-menu-description {
        color: rgba(255, 255, 255, 0.9);
    }

    .mega-menu-icon { color: var(--color-text-on-gradient-muted); transition: color var(--transition-fast); }
    .mega-menu-title { color: var(--color-text-on-gradient); transition: color var(--transition-fast); }
    .mega-menu-description { color: var(--color-text-on-gradient-muted); transition: color var(--transition-fast); }

    .mega-menu-column-featured {
        background: rgba(0, 0, 0, 0.2);
        border-color: rgba(255, 255, 255, 0.2);
        padding: 24px;
        border-radius: 12px;
    }
    
    .featured-item { text-align: center; }
    .featured-item-icon {
        background: rgba(255, 255, 255, 0.1);
        color: var(--color-text-on-gradient);
        margin-bottom: 16px;
        display: inline-block; padding: 12px; border-radius: 50%;
    }
    .featured-item-icon svg { width: 32px; height: 32px; }
    .featured-item-title, .featured-item-link { color: var(--color-text-on-gradient); }
    .featured-item-description { color: var(--color-text-on-gradient-muted); margin-bottom: 16px; font-size: 0.9rem; }
    .featured-item-link { font-weight: 600; text-decoration: none; }
    .featured-item-link:hover { text-decoration: underline; }
}

/* --- Mobile Styles --- */
@media (max-width: 991px) {
    .navbar-container {
        width: 100%;
        max-width: none;
        margin: 0;
        padding: 0 24px;
    }
    .mobile-menu-toggle {
        display: flex;
        align-items: center;
        justify-content: center;
        width: 44px;
        height: 44px;
        padding: 0;
        border-radius: 8px;
        border: 1px solid var(--color-gray-200);
        background-color: var(--color-white);
        box-shadow: 0 1px 2px rgba(16, 24, 40, .05);
    }
    .mobile-menu-toggle > svg { width: 24px; height: 24px; }
    .nav-links-container {
        position: fixed; top: 0; left: 0; width: 100%; height: 100vh;
        background-color: var(--color-white);
        flex-direction: column; align-items: stretch; justify-content: flex-start;
        padding: 80px 24px 40px; gap: 0;
        transform: translateX(100%);
        transition: transform var(--transition-smooth);
        overflow-y: auto; z-index: 1001;
    }
    .nav-links-container.active { transform: translateX(0); }
    .navbar-links {
        flex-direction: column; width: 100%; align-items: stretch; gap: 4px; margin-bottom: 24px; height: auto;
    }
    .nav-item, .nav-item-dropdown { width: 100%; height: auto; display: block; }
    .navbar-links .nav-link { 
        display: flex; justify-content: space-between; width: 100%; padding: 12px 16px; font-size: 1.1rem;
    }
    
    .mega-menu {
        position: static; transform: none; opacity: 1; visibility: visible; pointer-events: auto;
        box-shadow: none; border: none; width: 100%; padding: 0 0 0 16px; background: transparent;
        border-radius: 0; max-height: 0; overflow: hidden;
        transition: max-height var(--transition-smooth), padding var(--transition-smooth);
    }
    .nav-item-dropdown.open > .mega-menu {
        max-height: 500px;
        padding-top: 16px; padding-bottom: 16px;
    }
    .mega-menu-container { width: auto; max-width: none; margin: 0; padding: 0; }
    .mega-menu-grid, .mega-menu-grid-simple { display: block; padding: 0; gap: 0; }
    .mega-menu-column { margin-bottom: 16px; }
    .mega-menu-column:last-child { margin-bottom: 0; }
    .mega-menu-heading { padding: 0 12px; }
    .mega-menu-column-featured { display: none; }
    .nav-actions {
        flex-direction: column; width: 100%; gap: 16px; margin-top: auto;
        padding-top: 24px; border-top: 1px solid var(--color-gray-200);
    }
    .nav-button { width: 100%; padding: 12px; font-size: 1.1rem; }
}