/* --- Navigation (Enterprise Grade) --- */
#main-nav {
    width: 100%;
}

.nav-list {
    list-style: none;
    margin: 0;
    padding: 0;
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    overflow-x: auto;
    scrollbar-width: none;
    -ms-overflow-style: none;
}

.nav-list::-webkit-scrollbar {
    display: none;
}

.nav-list li {
    flex: 0 0 auto;
}

.nav-btn {
    background: transparent;
    color: rgba(255, 255, 255, 0.8);
    padding: 8px 16px;
    font-size: var(--font-size-sm);
    border: 1px solid transparent;
    border-radius: 8px;
    text-transform: none;
    letter-spacing: 0;
    transition: all 0.2s ease;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    box-shadow: none;
    font-weight: 500;
    min-height: 40px;
    position: relative;
}

.nav-btn:hover {
    background: rgba(255, 255, 255, 0.22);
    color: white;
    border-color: rgba(255, 255, 255, 0.1);
    transform: translateY(-2px);
}

.nav-btn.active {
    background: white;
    color: var(--primary-color);
    font-weight: 600;
    box-shadow: var(--shadow-md);
    border-color: rgba(255, 255, 255, 0.2);
}

.nav-badge {
    display: none;
    position: absolute;
    top: -6px;
    right: -6px;
    min-width: 20px;
    height: 20px;
    border-radius: 999px;
    background: var(--danger-color);
    color: #ffffff;
    font-size: 0.65rem;
    font-weight: var(--font-weight-semibold);
    align-items: center;
    justify-content: center;
    padding: 0 6px;
}

.nav-badge.is-visible {
    display: inline-flex;
}

.nav-btn .nav-icon {
    font-size: 1.25rem;
    line-height: 1;
}

.nav-btn .nav-label {
    font-size: 0.85rem;
}

@media (max-width: 768px) {
    .app-header {
        padding: var(--spacing-lg) var(--spacing-lg) var(--spacing-sm);
        gap: var(--spacing-md);
    }

    .header-bar {
        flex-direction: column;
        align-items: flex-start;
        gap: var(--spacing-sm);
    }

    .brand-subtitle {
        display: none;
    }

    .header-actions {
        width: 100%;
        justify-content: flex-end;
    }

    .nav-user-info {
        font-size: var(--font-size-xs);
        margin-right: auto;
    }

    /* Navigation Mobile Optimization */
    #main-nav {
        position: fixed;
        left: 0;
        right: 0;
        bottom: 0;
        padding: 6px 12px calc(env(safe-area-inset-bottom) + 6px);
        background: #FFFFFF;
        box-shadow: 0 -4px 20px rgba(0, 0, 0, 0.05);
        border-top: 1px solid #E2E8F0;
        z-index: 900;
    }

    .nav-list {
        justify-content: space-between;
        gap: 4px;
    }

    .nav-list li {
        flex: 1 1 0;
    }

    .nav-btn {
        background: transparent !important;
        color: #64748B !important;
        flex-direction: column;
        gap: 4px;
        min-height: 56px;
        border-radius: 8px;
        font-size: 0.7rem;
        padding: 6px;
        border: none;
    }

    .nav-badge {
        top: 4px;
        right: calc(50% - 16px);
    }

    .nav-btn .nav-label {
        font-size: 0.65rem;
        font-weight: 500;
        letter-spacing: 0.02em;
    }
    
    .nav-btn .nav-icon {
        font-size: 1.1rem;
        color: #94A3B8;
        transition: color 0.2s;
    }

    .nav-btn:hover {
        background-color: #F8FAFC !important;
    }

    .nav-btn.active {
        background: #F0F9FF !important;
        color: var(--primary-color) !important;
    }
    
    .nav-btn.active .nav-icon {
        color: var(--primary-color);
    }

    .nav-btn.active::after {
        display: none; /* Remove the underline, use highlight instead */
    }

    main {
        padding-top: var(--spacing-lg);
        padding-left: var(--spacing-md);
        padding-right: var(--spacing-md);
        padding-bottom: calc(env(safe-area-inset-bottom) + 110px);
    }

    #mesa-modal .categorias-container {
        display: flex;
        flex-wrap: nowrap;
        gap: var(--spacing-sm);
        overflow-x: auto;
        overflow-y: hidden;
        padding: var(--spacing-sm) var(--spacing-md);
        max-height: none;
        scrollbar-width: none;
    }

    #mesa-modal .categorias-container::-webkit-scrollbar {
        display: none;
    }

    .category-button {
        flex: 0 0 120px;
        min-height: 72px;
    }
}