body {
    background-color: #ffffff;
    color: #000000;
    font-family: Arial, sans-serif;
    margin: 0;
}

/* Header */
header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 10px 20px;
    background-color: #000000;
}

/* Logo container */
.logo-container {
    display: flex;
    align-items: center;
    gap: 15px;
}
.logo-box h1 {
    margin: 0;
    color: #ffffff;
    font-size: 32px;
}
.logo-box small {
    display: block;
    color: #bbbbbb;
    font-size: 14px;
    text-align: center;
    width: 100%;
}
.logo-slot {
    width: 60px;
    height: 60px;
    background-color: #ffffff;
    display: flex;
    justify-content: center;
    align-items: center;
    border-radius: 6px;
}
.logo-slot img {
    max-width: 100%;
    max-height: 100%;
}

/* Thanh công cụ */
nav ul {
    list-style: none;
    margin: 0;
    padding: 0;
    display: flex;
}
nav ul li {
    position: relative;
}
nav ul li a {
    color: #ffffff;
    text-decoration: none;
    padding: 10px 15px;
    display: block;
}
nav ul li a:hover {
    background-color: #333333;
}

/* Dropdown */
.dropdown-content {
    display: none;
    position: absolute;
    background-color: #000000;
    min-width: 150px;
    z-index: 1;
}
.dropdown-content li a {
    padding: 10px;
}
.dropdown:hover .dropdown-content {
    display: block;
}
.dropdown-sub {
    position: relative;
}
.dropdown-sub-content {
    display: none;
    position: absolute;
    left: 100%;
    top: 0;
    background-color: #000000;
    min-width: 150px;
}
.dropdown-sub:hover .dropdown-sub-content {
    display: block;
}

/* Vùng hero */
.hero {
    height: 40vh;
    display: flex;
    justify-content: center;
    align-items: center;
    background-color: #f0f0f0;
}

/* Nội dung chính */
main {
    padding: 20px;
    text-align: center;
}
main h2 {
    color: #000000;
}

/* Lưới sản phẩm: 4 cột, 2 hàng */
.product-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 20px;
    justify-items: center;
    margin-top: 20px;
}
.product {
    text-align: center;
}
.product img {
    width: 200px;
    border-radius: 8px;
}
.product h3 {
    margin: 10px 0 5px;
    color: #000000;
}
.product p {
    margin: 0;
    color: #101110;
    font-weight: bold;
}
.product button {
    margin-top: 10px;
    padding: 8px 12px;
    background-color: #0967f3;
    color: #ffffff;
    border: none;
    border-radius: 4px;
    cursor: pointer;
}
.product button:hover {
    background-color: #fa1504; /* xanh biển ngọc khi hover */
    color: #000000;
}

/* Footer */
footer {
    background-color: #000000;
    text-align: center;
    padding: 15px;
    color: #ffffff;
}