:root {
    --header-bg: #fff;
    --header-header-height: 78px;
    --header-sidebar-width: 314px;
    --header-sidebar-collapsed-width: 60px;
    --header-sidebar-bg: #fff;
    --header-sidebar-border: #DADEF2;
    --header-sidebar-active: #CCDDFF;
    --header-sidebar-link: #45464D;
    --header-sidebar-link-active: #0055FF;
    --header-content-bg: #fff;
    --header-shadow: 0 4px 32px rgba(0,0,0,0.04);
    --header-transition: all 0.3s ease;
}

body, .header-root {
    background: var(--header-bg);
    min-height: 100vh;
}

.header-header {
    height: var(--header-header-height);
    background: var(--header-bg);
    box-shadow: var(--header-shadow);
    padding: 0 40px;
    border-bottom: 1px solid var(--Border-Border--tertairy, #CFD3E5);
}


.header-logo img {
    height: 44px;
    width: 87px;
    object-fit: cover;
}

.header-menu .btn-link {
    color: var(--header-sidebar-link);
    font-size: 15px;
    font-weight: 500;
    text-decoration: none;
}

    .header-menu .btn-link.active, .header-menu .btn-link:focus, .header-menu .btn-link:hover {
        color: var(--header-sidebar-link-active);
    }

.header-contact span {
    font-size: 13px;
    font-weight: 600;
}

/* Mobile Menu Button */
.mobile-menu-btn {
    background: transparent;
    border: none;
    color: var(--header-sidebar-link);
    cursor: pointer;
    padding: 8px;
    border-radius: 4px;
    transition: background 0.2s, color 0.2s;
    display: flex;
    align-items: center;
    justify-content: center;
}

.mobile-menu-btn:hover {
    background: var(--header-sidebar-active);
    color: var(--header-sidebar-link-active);
}

.mobile-menu-btn:focus {
    outline: none;
    box-shadow: 0 0 0 2px var(--header-sidebar-link-active);
}

/* Cart Button */
.header-cart-btn {
    background: transparent;
    border: none;
    color: var(--header-sidebar-link);
    cursor: pointer;
    padding: 8px;
    border-radius: 4px;
    transition: background 0.2s, color 0.2s;
    display: flex;
    align-items: center;
    justify-content: center;
}

.header-cart-btn:hover {
    background: var(--header-sidebar-active);
    color: var(--header-sidebar-link-active);
}

.header-cart-btn:focus {
    outline: none;
    box-shadow: 0 0 0 2px var(--header-sidebar-link-active);
}

.header-sidebar {
    width: var(--header-sidebar-width);
    background: var(--header-sidebar-bg);
    border-right: 1px solid var(--header-sidebar-border);
    min-height: calc(100vh - var(--header-header-height));
    transition: var(--header-transition);
    overflow: hidden;
}

/* Collapsed sidebar state */
.header-sidebar.collapsed {
    width: var(--header-sidebar-collapsed-width);
}

    .header-sidebar .nav-link {
        color: var(--header-sidebar-link);
        font-size: 13px;
        font-weight: 600;
        border-radius: 4px;
        padding: 8px 12px;
        display: flex;
        align-items: center;
        gap: 8px;
        transition: background 0.2s, color 0.2s;
    }

        .header-sidebar .nav-link.active, .header-sidebar .nav-link:focus, .header-sidebar .nav-link:hover {
            background: var(--header-sidebar-active);
            color: var(--header-sidebar-link-active);
        }

.header-main {
    min-height: calc(100vh - var(--header-header-height));
    display: flex;
}

.header-content {
    background: var(--header-content-bg);
    box-shadow: var(--header-shadow);
    border-radius: 12px;
    flex: 1;
    transition: var(--header-transition);
    
}

@media (max-width: 991.98px) {
    .header-header {
        flex-direction: column;
        height: auto;
        padding: 16px;
    }

    .header-main {
        flex-direction: row;
        position: relative;
    }

    .header-sidebar {
        position: fixed;
        top: var(--header-header-height);
        left: -100%;
        width: 280px;
        height: calc(100vh - var(--header-header-height));
        z-index: 1050;
        transition: left 0.3s ease;
        border-right: 1px solid var(--header-sidebar-border);
        border-bottom: none;
        box-shadow: 2px 0 10px rgba(0, 0, 0, 0.1);
        overflow-y: auto;
    }
    
    .header-sidebar.mobile-open {
        left: 0;
    }
    
    .header-sidebar.collapsed {
        width: 280px;
    }
    
    .header-content {
        margin-left: 0;
        margin-top: 0;
        width: 100%;
    }
    
    /* Mobile sidebar backdrop */
    .sidebar-backdrop {
        position: fixed;
        top: var(--header-header-height);
        left: 0;
        width: 100%;
        height: calc(100vh - var(--header-header-height));
        background: rgba(0, 0, 0, 0.5);
        z-index: 1040;
        opacity: 0;
        visibility: hidden;
        transition: opacity 0.3s ease, visibility 0.3s ease;
    }
    
    .sidebar-backdrop.show {
        opacity: 1;
        visibility: visible;
    }
}