Here is the full CSS code with the updates:
CSS
/* GiwuStore Global Header - White & Deep Orange Theme */
.giwu-header {
    background: #fff;
    border-bottom: 2px solid #d35400;
    position: sticky;
    top: 0;
    z-index: 9999;
    font-family: 'Poppins', sans-serif;
}

/* Containers */
.giwu-header-container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 10px 20px;
    gap: 20px;
}

/* Logo */
.giwu-logo img {
    max-height: 50px;
}

/* Search */
.giwu-search {
    flex: 1;
    max-width: 100%;
}
.giwu-search form {
    display: flex;
}
.giwu-search input[type="search"] {
    flex: 1;
    padding: 8px 10px;
    border: 1px solid #ccc;
    border-right: none;
    border-radius: 4px 0 0 4px;
    font-size: 14px;
    background: #fff;
    color: #333;
}
.giwu-search input[type="search"]::placeholder {
    color: #999;
}
.giwu-search button {
    background: #d35400;
    color: #fff;
    border: none;
    padding: 8px 15px;
    border-radius: 0 4px 4px 0;
    cursor: pointer;
}
.giwu-search button:hover {
    background: #e67e22;
}

/* Top icons */
.giwu-icons {
    display: flex;
    align-items: center;
    gap: 15px;
}
.giwu-icon {
    color: #333;
    font-size: 22px;
    position: relative;
    text-decoration: none;
}
.giwu-icon:hover {
    color: #d35400;
}
.cart-count {
    position: absolute;
    top: -6px;
    right: -8px;
    background: #d35400;
    color: #fff;
    font-size: 11px;
    border-radius: 50%;
    padding: 2px 6px;
}

/* Custom menu */
.giwu-navigation {
    background: #fff;
    border-top: 1px solid #d35400;
    overflow-x: auto;
}
.giwu-menu {
    list-style: none;
    margin: 0 auto;
    padding: 0 10px;
    display: flex;
    gap: 30px;
    flex-wrap: nowrap;
    justify-content: center;
}
.giwu-menu li {
    flex: 0 0 auto;
}
.giwu-menu li a {
    text-decoration: none;
    color: #333;
    padding: 10px 0;
    display: flex;
    align-items: center;
    font-weight: 500;
}
.giwu-menu li a i {
    margin-right: 8px;
    font-size: 16px;
}
.giwu-menu li a:hover {
    color: #d35400;
}

/* Mobile / responsive adjustments */
@media (max-width: 991px) {
    .top-bar, .search-bar {
        width: 100%;
    }
    .giwu-search {
        width: 100%;
    }
    .giwu-navigation {
        overflow-x: auto;
        white-space: nowrap;
    }
    .giwu-menu {
        flex-direction: row;
        gap: 15px;
        padding: 0 10px;
    }
    .giwu-menu li a {
        padding: 8px 10px;
    }
}