/* navigation.css - Left navigation styles */
.left-nav {
    flex: 0 0 200px;
    position: sticky;
    top: 2rem;
    align-self: flex-start;
    border-radius: 40px;
    padding: 2rem 0.8rem;
    background: rgba(15, 18, 25, 0.9);
    backdrop-filter: blur(5px);
    -webkit-backdrop-filter: blur(5px);
    border: 1px solid var(--border-subtle);
    box-shadow: 0 20px 35px -10px var(--shadow-color);
    height: fit-content;
    transition: background-color 0.3s ease, border-color 0.2s ease;
}

body.light .left-nav {
    background: rgba(255, 255, 255, 0.9);
    border: 1px solid var(--border-subtle);
}

.nav-items {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.nav-link {
    color: var(--text-soft);
    text-decoration: none;
    padding: 0.8rem 1.5rem;
    border-radius: 40px;
    font-weight: 500;
    display: flex;
    align-items: center;
    gap: 0.8rem;
    transition: all 0.2s ease;
    border: 1px solid transparent;
}

.nav-link i {
    color: var(--accent-teal);
    width: 1.5rem;
    text-align: center;
    transition: color 0.2s ease;
}

.nav-link:hover {
    background: var(--hover-glow);
    border-color: var(--accent-teal);
    color: var(--text-bright);
    transform: translateX(5px);
    text-decoration: none;
}

.nav-link.active {
    background: var(--accent-teal-dim);
    color: var(--text-bright);
    border-color: var(--accent-teal);
    box-shadow: 0 0 12px var(--accent-teal);
}

.theme-toggle {
    margin-top: 2rem;
    text-align: center;
}

.theme-toggle button {
    background: transparent;
    border: 1px solid var(--accent-teal);
    color: var(--accent-teal);
    padding: 0.5rem 1rem;
    border-radius: 30px;
    cursor: pointer;
    width: 100%;
    font-weight: 600;
    transition: all 0.2s ease;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
}

.theme-toggle button:hover {
    background: var(--accent-teal);
    color: var(--bg-deep);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px var(--accent-teal);
}

.theme-toggle button i {
    font-size: 1rem;
}

/* Responsive navigation */
@media (max-width: 800px) {
    .left-nav {
        position: relative;
        top: 0;
        width: 100%;
        flex: auto;
        padding: 1rem;
    }
    
    .nav-items {
        flex-direction: row;
        flex-wrap: wrap;
        justify-content: center;
    }
    
    .nav-link {
        padding: 0.5rem 1.2rem;
        font-size: 0.9rem;
    }
    
    .nav-link:hover {
        transform: translateY(-2px);
    }
}