:root {
    --op-black: #000000;
    --op-white: #ffffff;
    --op-red: #eb0028;
    --op-red-dark: #c50020;
    --font-primary: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
}

[data-op-topbar],
[data-op-topbar] * {
    box-sizing: border-box;
}

[data-op-topbar] a {
    text-decoration: none;
    color: inherit;
}

[data-op-topbar] img,
[data-op-topbar] svg {
    max-width: 100%;
    height: auto;
}

/* ==================== Site Header ==================== */
[data-op-topbar].site-header {
    background-color: #ffffff;
    position: sticky;
    top: 0;
    z-index: 1000;
    border-bottom: 1px solid #e8e8e8;
    font-family: var(--font-primary);
}

[data-op-topbar] .header-wrapper {
    max-width: 100%;
    margin: 0 auto;
    padding: 0 40px;
    display: grid;
    align-items: center;
    grid-template-columns: 1fr auto 1fr;
    height: 60px;
}

[data-op-topbar] .header-left,
[data-op-topbar] .header-right {
    display: flex;
    align-items: center;
}

[data-op-topbar] .header-left {
    justify-content: flex-start;
}

[data-op-topbar] .header-center {
    display: flex;
    align-items: center;
    justify-content: center;
}

[data-op-topbar] .header-right {
    justify-content: flex-end;
}

/* Logo */
[data-op-topbar] .header-logo {
    display: flex;
    align-items: center;
    flex-shrink: 0;
}

[data-op-topbar] .oneplus-logo {
    height: 60px;
    width: auto;
    max-width: 240px;
    display: block;
    object-fit: contain;
}

[data-op-topbar] .header-logo:hover {
    opacity: 0.8;
}

/* Main Navigation - Centered */
[data-op-topbar] .header-nav {
    display: flex;
    align-items: center;
    justify-content: center;
    height: 100%;
}

[data-op-topbar] .nav-list {
    display: flex;
    align-items: center;
    justify-content: center;
    list-style: none;
    margin: 0;
    padding: 0;
    height: 100%;
    gap: 8px;
}

[data-op-topbar] .nav-list-item {
    position: relative;
    height: 60px;
    display: flex;
    align-items: center;
}

/* Nav Link with Red Underline on Hover */
[data-op-topbar] .nav-list-link {
    display: flex;
    align-items: center;
    height: 100%;
    padding: 0 12px;
    font-size: 14px;
    font-weight: 400;
    color: #000000;
    position: relative;
    transition: color 0.2s ease;
}

[data-op-topbar] .nav-list-link::after {
    content: '';
    position: absolute;
    bottom: 15px;
    left: 12px;
    right: 12px;
    height: 2px;
    background-color: #EB0028;
    transform: scaleX(0);
    transition: transform 0.2s ease;
}

[data-op-topbar] .nav-list-item:hover .nav-list-link::after,
[data-op-topbar] .nav-list-item.active .nav-list-link::after {
    transform: scaleX(1);
}

/* Mega Dropdown - FULL VIEWPORT Width */
[data-op-topbar] .mega-dropdown {
    visibility: hidden;
    opacity: 0;
    max-height: 0;
    position: fixed;
    top: 60px;
    left: 0;
    right: 0;
    width: 100vw;
    background-color: #ffffff;
    border-top: 1px solid #e8e8e8;
    box-shadow: 0 8px 30px rgba(0, 0, 0, 0.1);
    padding: 0;
    z-index: 100;
    overflow: hidden;
    transition: all 0.5s ease;
}

[data-op-topbar] .mega-dropdown-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 40px;
    display: flex;
    flex-direction: column;
    gap: 30px;
    opacity: 0;
    transition: opacity 1s ease 0.5s;
}

[data-op-topbar] .nav-list-item.has-mega-dropdown:hover .mega-dropdown,
[data-op-topbar] .nav-list-item.has-mega-dropdown.is-open .mega-dropdown {
    visibility: visible;
    opacity: 1;
    max-height: 600px;
}

[data-op-topbar] .nav-list-item.has-mega-dropdown:hover .mega-dropdown-container,
[data-op-topbar] .nav-list-item.has-mega-dropdown.is-open .mega-dropdown-container {
    opacity: 1;
}

[data-op-topbar] .product-section {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

[data-op-topbar] .section-title {
    font-size: 12px;
    font-weight: 400;
    color: #999999;
    text-transform: none;
    letter-spacing: 0;
    margin: 0;
    padding-bottom: 8px;
}

[data-op-topbar] .product-grid {
    display: flex;
    flex-wrap: wrap;
    gap: 16px;
}

[data-op-topbar] .product-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    padding: 12px;
    border-radius: 8px;
    transition: background-color 0.2s ease;
    min-width: 90px;
    position: relative;
}

[data-op-topbar] .product-item:hover {
    background-color: #f5f5f5;
}

[data-op-topbar] .product-img-wrap {
    width: 70px;
    height: 70px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 8px;
}

[data-op-topbar] .product-img-wrap img {
    max-width: 100%;
    max-height: 100%;
    object-fit: contain;
}

[data-op-topbar] .product-name {
    font-size: 12px;
    color: #000000;
    font-weight: 400;
    line-height: 1.4;
}

[data-op-topbar] .new-badge {
    font-size: 10px;
    color: #EB0028;
    font-weight: 400;
    margin-top: 2px;
}

/* Mobile Toggle */
[data-op-topbar] .mobile-menu-toggle {
    display: none;
    flex-direction: column;
    justify-content: center;
    gap: 4px;
    width: 40px;
    height: 40px;
    border: none;
    background: transparent;
    cursor: pointer;
    padding: 10px;
}

[data-op-topbar] .mobile-menu-toggle span {
    display: block;
    width: 20px;
    height: 2px;
    background-color: #000000;
    transition: all 0.3s ease;
}

@media (max-width: 991.98px) {
    [data-op-topbar] .header-wrapper {
        padding: 0 16px;
        display: flex;
        justify-content: space-between;
        align-items: center;
        height: 60px;
    }

    [data-op-topbar] .oneplus-logo {
        height: 40px;
        max-width: 150px;
        display: block;
    }

    [data-op-topbar] .header-center {
        display: flex;
        align-items: center;
        width: 0;
        height: 0;
        overflow: visible;
    }

    [data-op-topbar] .mobile-menu-toggle {
        display: flex;
        margin-right: -8px; /* Offset padding to align lines to edge if needed */
    }

    [data-op-topbar] .header-nav {
        display: none;
        position: fixed;
        top: 60px;
        left: 0;
        right: 0;
        bottom: 0;
        height: auto;
        background: #ffffff;
        border-top: 1px solid #e8e8e8;
        overflow: auto;
        justify-content: flex-start;
        align-items: stretch;
    }

    [data-op-topbar].is-mobile-open .header-nav {
        display: block;
    }

    [data-op-topbar] .nav-list {
        flex-direction: column;
        align-items: stretch;
        justify-content: flex-start;
        height: auto;
        gap: 0;
        padding: 8px 0;
    }

    [data-op-topbar] .nav-list-item {
        height: auto;
        flex-direction: column;
        align-items: stretch;
    }

    [data-op-topbar] .nav-list-link {
        padding: 14px 16px;
        height: auto;
    }

    [data-op-topbar] .nav-list-link::after {
        display: none;
    }

    [data-op-topbar] .mega-dropdown {
        position: static;
        width: auto;
        visibility: visible;
        opacity: 1;
        max-height: 0;
        border-top: 0;
        box-shadow: none;
        transition: max-height 0.25s ease;
    }

    [data-op-topbar] .mega-dropdown-container {
        padding: 16px;
        opacity: 1;
        transition: none;
    }

    [data-op-topbar] .nav-list-item.has-mega-dropdown.is-open .mega-dropdown {
        max-height: 1200px;
    }
}