/*
=====================================
HEADER & NAVIGATION STYLES
=====================================
*/

.header {
    position: fixed;
    top: 0;
    width: 100%;
    background: hsla(var(--neutral-light-h), var(--neutral-light-s), var(--neutral-light-l), 0.15);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid rgba(255, 255, 255, 0.08);
    box-shadow: var(--shadow-md);
    z-index: 100;
    transition: all 0.3s ease;
}

.nav {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--space-md);
    padding: var(--space-md) 0;
}

.logo {
    width: 40px;
    height: 40px;
    transition: transform 0.3s ease;
}

.logo:hover {
    transform: scale(1.05);
}

.nav-links {
    display: flex;
    list-style: none;
    margin: 0;
    padding: 0;
    gap: var(--space-xl);
}

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

.nav-toggle {
    display: none;
    border: none;
    background: rgba(255, 255, 255, 0.05);
    cursor: pointer;
    padding: var(--space-xs);
    border-radius: var(--border-radius);
    transition: all 0.3s ease;
    backdrop-filter: blur(10px);
    box-shadow: var(--shadow-xs);
}

.nav-toggle:hover {
    background: rgba(255, 255, 255, 0.1);
    box-shadow: var(--shadow-sm);
}

.nav-toggle:focus-visible {
    outline: 2px solid var(--color-interactive-primary);
    outline-offset: 4px;
}

.nav-toggle-box {
    display: flex;
    flex-direction: column;
    gap: 5px;
}

.nav-toggle-bar {
    width: 22px;
    height: 2px;
    background: var(--color-text-primary);
    transition: transform 0.3s ease, opacity 0.3s ease;
}

.nav-overlay {
    position: fixed;
    inset: 0;
    background: rgba(11, 11, 11, 0.55);
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
    transition: opacity 0.3s ease;
    z-index: 90;
}

.nav-overlay.active {
    opacity: 1;
    visibility: visible;
    pointer-events: auto;
}

.nav-link {
    color: var(--color-text-primary);
    text-decoration: none;
    font-weight: 500;
    font-size: var(--font-size-sm);
    transition: color 0.3s ease;
    position: relative;
}

.nav-link:hover {
    color: var(--color-interactive-primary);
}

.nav-link:focus {
    outline: 2px solid var(--color-interactive-primary);
    outline-offset: 4px;
    border-radius: 4px;
}

/* Mobile Navigation */
@media (max-width: 768px) {
    .nav {
        position: relative;
    }

    .nav-actions {
        gap: var(--space-sm);
    }

    .nav-toggle {
        display: inline-flex;
        align-items: center;
        justify-content: center;
    }

    .nav-links {
        position: fixed;
        top: 70px;
        right: var(--space-md);
        left: var(--space-md);
        display: flex;
        flex-direction: column;
        gap: var(--space-lg);
        padding: var(--space-2xl) var(--space-xl);
        background: var(--color-bg-primary);
        border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-lg);
        opacity: 0;
        transform: translateY(-20px);
        pointer-events: none;
        transition: opacity 0.3s ease, transform 0.3s ease;
        z-index: 100;
    }

    .nav-links.active {
        opacity: 1;
        transform: translateY(0);
        pointer-events: auto;
    }

    .nav-link {
        font-size: var(--font-size-base);
    }

    body.nav-open {
        overflow: hidden;
    }

    body.nav-open .nav-toggle-bar:nth-child(1) {
        transform: translateY(7px) rotate(45deg);
    }

    body.nav-open .nav-toggle-bar:nth-child(2) {
        opacity: 0;
    }

    body.nav-open .nav-toggle-bar:nth-child(3) {
        transform: translateY(-7px) rotate(-45deg);
    }
}