/* PersonalOS Navigation */

#personal-os-nav {
    background: rgba(10, 10, 18, 0.85);
    /* Slightly more opaque than standard glass for readability */
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border-bottom: 1px solid var(--glass-border);
    position: sticky;
    top: 0;
    z-index: 9999;
    padding: 0;
    transition: background 0.3s ease;
}

/* Nav Container */
.nav-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    max-width: 1400px;
    margin: 0 auto;
    padding: 0.75rem 2rem;
}

/* Brand */
.nav-brand {
    font-family: var(--font-heading);
    font-weight: 700;
    font-size: 1.25rem;
    color: var(--os-text-primary);
    display: flex;
    align-items: center;
    gap: 12px;
    letter-spacing: 0.5px;
}

.nav-brand span {
    filter: drop-shadow(0 0 5px rgba(0, 242, 255, 0.5));
}

/* Menu */
.nav-menu {
    display: flex;
    list-style: none;
    margin: 0;
    padding: 0;
    gap: 2rem;
}

.nav-item {
    position: relative;
}

.nav-link {
    font-family: var(--font-body);
    font-weight: 500;
    font-size: 0.95rem;
    color: var(--os-text-secondary);
    padding: 0.5rem 0;
    cursor: pointer;
    transition: color 0.2s ease, text-shadow 0.2s ease;
    position: relative;
}

.nav-link::after {
    content: '';
    position: absolute;
    width: 0;
    height: 2px;
    bottom: 0;
    left: 0;
    background: var(--gradient-primary);
    transition: width 0.3s var(--ease-out-expo);
}

.nav-item:hover .nav-link {
    color: var(--os-text-primary);
    text-shadow: 0 0 12px rgba(0, 242, 255, 0.4);
}

.nav-item:hover .nav-link::after {
    width: 100%;
}

/* Dropdown */
.dropdown {
    position: absolute;
    top: calc(100% + 15px);
    left: 50%;
    transform: translateX(-50%) translateY(10px);
    background: rgba(17, 17, 26, 0.95);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid var(--glass-border);
    border-radius: 12px;
    min-width: 240px;
    box-shadow: 0 20px 40px -5px rgba(0, 0, 0, 0.4);
    opacity: 0;
    visibility: hidden;
    padding: 0.5rem;
    transition: all 0.3s var(--ease-out-expo);
    z-index: 1000;
}

/* Triangle for dropdown */
.dropdown::before {
    content: '';
    position: absolute;
    top: -6px;
    left: 50%;
    transform: translateX(-50%) rotate(45deg);
    width: 12px;
    height: 12px;
    background: inherit;
    border-top: 1px solid var(--glass-border);
    border-left: 1px solid var(--glass-border);
    z-index: -1;
}

/* Hover State to Show Dropdown */
.nav-item:hover .dropdown {
    opacity: 1;
    visibility: visible;
    transform: translateX(-50%) translateY(0);
}

/* Dropdown Links */
.dropdown a {
    display: block;
    padding: 0.75rem 1rem;
    color: var(--os-text-secondary);
    font-size: 0.9rem;
    border-radius: 8px;
    transition: all 0.2s ease;
    text-shadow: none;
}

.dropdown a:hover {
    background: rgba(255, 255, 255, 0.05);
    color: var(--os-text-primary);
    transform: translateX(4px);
}

/* Responsive (Hamburger would go here for mobile, keeping simple for now) */
@media (max-width: 768px) {
    .nav-container {
        flex-direction: column;
        gap: 1rem;
    }

    .nav-menu {
        gap: 1rem;
        flex-wrap: wrap;
        justify-content: center;
    }
}