/* Sidebar (Desktop) */
.sidebar {
    position: fixed;
    left: 1.5rem;
    top: 1.5rem;
    bottom: 1.5rem;
    width: var(--sidebar-width);
    background: var(--surface-color);
    border: 1px solid var(--border-color);
    z-index: 100;
    display: flex;
    flex-direction: column;
    transition: all 0.4s ease;
}

/* Bottom Nav (Mobile) */
.bottom-nav {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    height: var(--bottom-nav-height);
    background: var(--surface-color);
    border-top: 1px solid var(--border-color);
    display: none;
    justify-content: space-around;
    align-items: center;
    padding: 0 1rem;
    z-index: 100;
    backdrop-filter: blur(20px);
}

.nav-item {
    display: flex;
    align-items: center;
    gap: 1.2rem;
    padding: 1.1rem 1.4rem;
    color: var(--text-secondary);
    text-decoration: none;
    border-radius: 18px;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    font-weight: 500;
    font-size: 0.95rem;
}

.nav-item:hover {
    color: var(--text-primary);
    background: rgba(255, 255, 255, 0.05);
    transform: translateX(5px);
}

.nav-item.active {
    color: var(--text-primary);
    background: rgba(255, 255, 255, 0.08);
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
}

.nav-item i {
    font-size: 1.2rem;
    width: 20px;
    text-align: center;
}

.nav-item.active i {
    color: var(--accent-color);
}

/* Responsiveness */
@media (max-width: 1024px) {
    .sidebar {
        display: none;
    }
    .bottom-nav {
        display: flex;
    }
}