/* ===== NAVIGATION ===== */
nav {
    position: sticky;
    top: 0;
    background: var(--color-bg);
    padding: 1rem 2rem;
    border-bottom: 1px solid var(--color-border);
    z-index: 1000;
    font-size: 0.9rem;
}

nav::before {
    content: '┌─────────────────────────────────────────────────────────────────────┐';
    display: block;
    color: var(--color-border);
    overflow: hidden;
    white-space: nowrap;
    margin-bottom: 0.5rem;
}

nav::after {
    content: '└─────────────────────────────────────────────────────────────────────┘';
    display: block;
    color: var(--color-border);
    overflow: hidden;
    white-space: nowrap;
    margin-top: 0.5rem;
}

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

/* Command Line Display */
nav .logo {
    font-weight: 700;
    color: var(--color-heading);
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

nav .logo .prompt {
    color: var(--color-accent);
}

nav .logo .command {
    color: var(--color-text);
    min-width: 150px;
    transition: all 0.3s ease;
}

@keyframes blink {
    0%, 49% { opacity: 1; }
    50%, 100% { opacity: 0; }
}

/* Navigation Links */
nav ul {
    list-style: none;
    display: flex;
    gap: 2rem;
    align-items: center;
}

nav ul li a {
    color: var(--color-text);
    font-weight: 500;
    text-decoration: none;
    position: relative;
    transition: var(--transition);
}

nav ul li a::before {
    content: '[';
    color: var(--color-accent);
}

nav ul li a::after {
    content: ']';
    color: var(--color-accent);
}

nav ul li a:hover {
    background: var(--color-accent);
    color: var(--color-bg);
}

/* Active Link State */
nav ul li a.active {
    color: var(--color-accent);
    font-weight: 700;
}

nav ul li a.active::before,
nav ul li a.active::after {
    color: var(--color-heading);
}

/* Theme Toggle */
.theme-toggle {
    background: transparent;
    border: 1px solid var(--color-border);
    padding: 0.25rem 0.75rem;
    cursor: pointer;
    font-family: var(--font-mono);
    color: var(--color-text);
    transition: var(--transition);
}

.theme-toggle:hover {
    background: var(--color-accent);
    color: var(--color-bg);
}

/* Responsive */
@media (max-width: 768px) {
    nav .nav-content {
        flex-direction: column;
        gap: 1rem;
    }
    
    nav .logo .command {
        min-width: 100px;
        font-size: 0.8rem;
    }
    
    nav ul {
        gap: 1rem;
        flex-wrap: wrap;
        justify-content: center;
    }
    
    nav::before,
    nav::after {
        font-size: 0.6rem;
    }
}