body {
    font-family: Arial;
    margin: 0;
    background-color: #f5f5f5;
}

/* Header */
header {
    background-color: black;
    color: white;
    padding: 15px;
    text-align: center;
    font-size: 24px;
    font-weight: bold;
}

/* Menu */
nav {
    background-color: #333;
    padding: 10px;
    text-align: center;
}

nav a {
    color: white;
    text-decoration: none;
    margin: 0 15px;
    font-weight: bold;
}

nav a:hover {
    color: yellow;
}
/* NAVBAR */
.navbar {
    background-color: #eee;
}

/* KHUNG GIỮA */
.nav-container {
    max-width: 1200px;
    margin: auto;              /* 🔥 canh giữa toàn bộ */
    display: flex;
    align-items: center;
    gap: 30px;
    padding: 10px 20px;
}

/* ICON ☰ */
.menu-icon {
    font-size: 26px;
    color: black;
    cursor: pointer;
}

/* MENU */
.nav-links {
    display: flex;
    gap: 30px;
}

.nav-links a {
    color: black;
    text-decoration: none;
    font-weight: bold;
    padding: 5px 10px;
}

/* hover */
.nav-links a:hover {
    background-color: #ccc;
    border-radius: 5px;
    transform: translateY(2px);
    transition: 0.2s;
}

.side-menu {
    position: fixed;
    top: 0;
    left: -220px;
    width: 220px;
    height: 100%;
    background-color: #111;
    display: flex;
    flex-direction: column;
    padding-top: 70px;
    transition: 0.3s;
    z-index: 1000;
}

.side-menu.show {
    left: 0;
}

.side-menu a {
    color: white;
    padding: 15px 20px;
    text-decoration: none;
    border-bottom: 1px solid #333;
}

/* hover mượt */
.side-menu a:hover {
    background-color: #333;
    transform: translateX(5px);
    transition: 0.2s;
}

/* Banner */
.banner {
    background-color: #ddd;
    text-align: center;
    padding: 40px;
    font-size: 28px;
}

/* Product */
.container {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    padding: 20px;
}

.product {
    background: white;
    width: 250px;
    margin: 15px;
    padding: 15px;
    border-radius: 10px;
    text-align: center;
    box-shadow: 0 0 10px rgba(0,0,0,0.1);
}

.product img {
    width: 100%;
    height: 200px;       /* 🔥 fix ảnh cao đều */
    object-fit: cover;   /* không méo ảnh */
    border-radius: 10px;
}

.product h3 {
    margin: 10px 0;
}

.price {
    color: red;
    font-weight: bold;
    margin-bottom: 10px;
}

.btn {
    background-color: black;
    color: white;
    padding: 10px;
    border: none;
    cursor: pointer;
    border-radius: 5px;
}

.btn:hover {
    background-color: orange;
}

/* Footer */
footer {
    background-color: black;
    color: white;
    text-align: center;
    padding: 15px;
    margin-top: 20px;
}

/* MENU ICON */
.menu-icon {
    font-size: 24px;
    color: white;
    cursor: pointer;
}

/* MENU */
.menu {
    display: none;
    flex-direction: column;
    background-color: #444;
    margin-top: 10px;
}

.menu a {
    padding: 10px;
    border-top: 1px solid #555;
}

/* Hover hiệu ứng lún */
.menu a:hover {
    background-color: #666;
    transform: translateY(2px); /* 🔥 lún xuống */
    transition: 0.2s;
}
footer {
    background-color: black;
    color: white;
    padding: 15px 0;
}

.footer-container {
    max-width: 1200px;
    margin: auto;
    display: flex;
    justify-content: space-around; /* 🔥 chia đều */
    align-items: center;
    flex-wrap: wrap; /* xuống dòng nếu màn nhỏ */
    text-align: center;
    gap: 10px;
}
/* đẩy 2 bên ra */
.nav-container {
    max-width: 1200px;
    margin: auto;
    display: flex;
    align-items: center;
    padding: 10px 20px;
}

/* menu giữa */
.nav-links {
    display: flex;
    gap: 30px;
    margin: auto; /* 🔥 giữ nó ở giữa */
}

/* bài tập bên phải */
.nav-right a {
    color: black;
    text-decoration: none;
    font-weight: bold;
    margin-right: 20px; /* 🔥 xích vào trái */
}