/* Navigation */
.header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    z-index: 1000;
    border-bottom: 1px solid var(--neutral-200);
    transition: transform 0.3s ease;
}

.header.hidden {
    transform: translateY(-100%);
}

.nav-container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 80px;
}

.logo {
    font-family: var(--font-heading);
    font-size: var(--text-2xl);
    font-weight: var(--weight-bold);
    color: var(--primary-blue);
    text-decoration: none;
}

.nav-menu {
    display: flex;
    align-items: center;
    gap: 0.2rem; /* Minimal gap between items */
    padding: 0.25rem 0; /* Add vertical padding */
}

.nav-link {
    font-weight: 500;
    color: var(--neutral-700);
    transition: all 0.16s cubic-bezier(0.2, 0, 0.1, 1);
    position: relative;
    padding: 0.6rem 0.85rem; /* Optimized padding */
    margin: 0.1rem 0; /* Subtle vertical margin */
    border-radius: 6px;
    display: flex;
    align-items: center;
    gap: 0.4rem; /* Tight gap */
    font-size: 0.9rem;
    letter-spacing: 0.01em;
    line-height: 1.2;
    white-space: nowrap;
}

.nav-link i {
    font-size: 1.05em;
    width: 1.1rem;
    text-align: center;
    transition: all 0.15s cubic-bezier(0.2, 0, 0.1, 1);
    opacity: 0.85;
    position: relative;
    top: -0.5px; /* Fine-tune vertical alignment */
}

.nav-link:hover {
    color: var(--primary-blue);
    background-color: var(--neutral-50);
    transform: translateY(-1px);
}

.nav-link:hover i {
    transform: translateX(2px);
}

/* Active state for current page */
.nav-link.active {
    color: var(--primary-blue);
    font-weight: 600;
}

.nav-link.active::after {
    content: '';
    position: absolute;
    left: 1.25rem;
    right: 1.25rem;
    bottom: 0.5rem;
    height: 2px;
    background: var(--primary-blue);
    border-radius: 2px;
}

/* Mega Menu */
.has-dropdown {
    position: relative;
}

.mega-menu {
    position: absolute;
    top: 100%;
    left: 50%;
    transform: translateX(-50%) translateY(8px);
    width: 100vw;
    max-width: 960px; /* Optimized width */
    background: var(--neutral-white);
    border-radius: 8px;
    box-shadow: 0 10px 20px -5px rgba(0, 0, 0, 0.08), 0 4px 6px -2px rgba(0, 0, 0, 0.03);
    padding: 1.25rem 1.5rem; /* Compact padding */
    opacity: 0;
    visibility: hidden;
    transition: all 0.16s cubic-bezier(0.2, 0, 0.1, 1);
    z-index: 1001;
    margin-top: 0.35rem;
    border: 1px solid var(--neutral-100);
}

.mega-menu .grid-12 {
    display: grid;
    grid-template-columns: repeat(12, 1fr);
    gap: 1.25rem; /* Minimal gap */
    margin: 0 -0.5rem; /* Tight negative margin */
}

.mega-menu > .grid-12 > div {
    padding: 0 1rem;
    position: relative;
}

/* Add subtle separator between columns */
.mega-menu > .grid-12 > div:not(:last-child)::after {
    content: '';
    position: absolute;
    right: 0;
    top: 0;
    bottom: 0;
    width: 1px;
    background: var(--neutral-100);
}

.mega-menu h4 {
    font-size: 0.775rem;
    font-weight: 600;
    color: var(--neutral-600);
    margin: 0 0 0.75rem 0;
    text-transform: uppercase;
    letter-spacing: 0.04em;
    padding-bottom: 0.4rem;
    border-bottom: 1px solid var(--neutral-100);
    position: relative;
}

.mega-menu h4::after {
    content: '';
    position: absolute;
    left: 0;
    bottom: -1px;
    width: 40px;
    height: 2px;
    background: var(--primary-blue);
}

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

.mega-menu li {
    margin-bottom: 0.6rem;
}

.mega-menu a {
    display: flex;
    align-items: center;
    padding: 0.4rem 0.65rem; /* Ultra compact */
    margin: 0.08rem 0; /* Minimal margin */
    color: var(--neutral-700);
    text-decoration: none;
    border-radius: 4px;
    transition: all 0.12s cubic-bezier(0.2, 0, 0.1, 1);
    font-size: 0.875rem;
    line-height: 1.2;
    position: relative;
    overflow: hidden;
}

.mega-menu a::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    bottom: 0;
    width: 3px;
    background: var(--primary-blue);
    transform: scaleY(0);
    transform-origin: center top;
    transition: transform 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}

.mega-menu a:hover {
    color: var(--primary-blue);
    background-color: var(--neutral-50);
    padding-left: 0.85rem;
    padding-right: 0.55rem;
}

.mega-menu a:hover::before {
    transform: scaleY(1);
}

/* Add icon to menu items */
.mega-menu a i {
    margin-right: 0.5rem;
    font-size: 0.95em;
    color: var(--neutral-400);
    transition: all 0.12s cubic-bezier(0.2, 0, 0.1, 1);
    width: 0.95rem;
    text-align: center;
    flex-shrink: 0;
    opacity: 0.85;
}

.mega-menu a:hover i {
    color: var(--primary-blue);
    transform: translateX(2px);
}

.has-dropdown:hover .mega-menu {
    opacity: 1;
    visibility: visible;
    transform: translateX(-50%) translateY(0);
}

/* Mobile Menu */
.mobile-menu-btn {
    display: none;
    background: none;
    border: none;
    cursor: pointer;
    padding: var(--space-2);
}

.mobile-menu {
    position: fixed;
    top: 80px;
    left: 0;
    width: 100%;
    height: calc(100vh - 80px);
    background: var(--neutral-white);
    padding: var(--space-6);
    transform: translateX(100%);
    transition: transform 0.3s ease;
    overflow-y: auto;
}

.mobile-menu.active {
    transform: translateX(0);
}

@media (max-width: 1024px) {
    .nav-menu {
        display: none;
    }

    .mobile-menu-btn {
        display: block;
    }
}