/* =====================================================
   NAVIGATION
   ===================================================== */

.nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    padding: var(--space-4) 0;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--bg-tertiary);
}

.nav-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.nav-logo {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    text-decoration: none;
}

.nav-logo-icon {
    width: auto;
    height: 36px;
    color: var(--pareto-black);
}

.nav-logo-text {
    font-weight: 700;
    font-size: 1.125rem;
    letter-spacing: -0.01em;
}

.nav-logo-text .pareto {
    color: var(--pareto-black);
}

.nav-logo-text .economics {
    color: var(--pareto-blue);
}

.nav-links {
    display: flex;
    align-items: center;
    gap: var(--space-8);
}

.nav-link {
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--pareto-slate);
    text-decoration: none;
    transition: color 0.2s ease;
    position: relative;
    cursor: pointer;
}

.nav-link:hover,
.nav-link.active {
    color: var(--pareto-black);
}

.nav-cta {
    display: inline-flex;
    align-items: center;
    gap: var(--space-2);
    padding: var(--space-3) var(--space-5);
    background: var(--pareto-black);
    color: white;
    font-size: 0.875rem;
    font-weight: 600;
    text-decoration: none;
    border-radius: var(--radius-sm);
    transition: all 0.2s ease;
}

.nav-cta:hover {
    background: var(--pareto-midnight);
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

/* Dropdown Styles */
.nav-dropdown {
    position: absolute;
    top: 100%;
    left: 50%;
    transform: translateX(-50%) translateY(10px);
    background: var(--bg-primary);
    border: 1px solid var(--bg-tertiary);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-lg);
    padding: var(--space-2);
    min-width: 200px;
    opacity: 0;
    visibility: hidden;
    transition: all 0.2s ease;
    z-index: 1001;
}

.nav-item-has-dropdown {
    position: relative;
    display: flex;
    align-items: center;
    gap: 4px;
}

/* Initial state for dropdown arrow */
.dropdown-arrow {
    transition: transform 0.2s ease;
}

/* Hover state for desktop */
@media (min-width: 769px) {
    .nav-item-has-dropdown:hover .nav-dropdown {
        opacity: 1;
        visibility: visible;
        transform: translateX(-50%) translateY(0);
    }

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

.dropdown-link {
    display: block;
    padding: var(--space-2) var(--space-3);
    color: var(--pareto-slate);
    text-decoration: none;
    font-size: 0.875rem;
    border-radius: var(--radius-sm);
    transition: all 0.1s ease;
    white-space: nowrap;
}

.dropdown-link:hover {
    background: var(--bg-secondary);
    color: var(--pareto-blue);
}

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

/* Mobile Styles */
@media (max-width: 768px) {
    .mobile-menu-toggle {
        display: block;
    }

    .nav-links {
        display: none;
        /* Hidden by default */
        position: fixed;
        top: 73px;
        /* Height of nav header roughly */
        left: 0;
        right: 0;
        background: var(--bg-primary);
        flex-direction: column;
        align-items: flex-start;
        padding: var(--space-6);
        gap: var(--space-4);
        border-bottom: 1px solid var(--bg-tertiary);
        box-shadow: var(--shadow-lg);
        height: calc(100vh - 73px);
        overflow-y: auto;
    }

    .nav-links.mobile-open {
        display: flex;
    }

    .nav-link {
        font-size: 1.125rem;
        width: 100%;
        padding: var(--space-2) 0;
    }

    .nav-cta {
        width: 100%;
        justify-content: center;
        margin-top: var(--space-4);
    }

    /* Mobile Dropdown */
    .nav-item-has-dropdown {
        flex-direction: column;
        align-items: flex-start;
        width: 100%;
    }

    .dropdown-trigger {
        display: flex;
        justify-content: space-between;
        width: 100%;
        align-items: center;
    }

    .nav-dropdown {
        position: static;
        transform: none;
        box-shadow: none;
        border: none;
        padding: 0;
        padding-left: var(--space-4);
        display: none;
        /* JavaScript will toggle this */
        opacity: 1;
        visibility: visible;
        width: 100%;
    }

    .nav-dropdown.show {
        display: block;
    }

    .dropdown-arrow.rotate {
        transform: rotate(180deg);
    }
}