/* Thiết lập chung */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Arial', sans-serif;
}

body {
    background-color: #f4f4f4;
}

/* Header & Menu */
header {
    background: #1a1a1a;
    color: white;
    padding: 15px 5%;
    position: sticky;
    top: 0;
    z-index: 100;
}

.navbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-size: 24px;
    font-weight: bold;
}

.logo span {
    color: #e67e22;
}

.nav-links {
    list-style: none;
    display: flex;
}

.nav-links li {
    margin-left: 25px;
}

.nav-links a {
    color: white;
    text-decoration: none;
    transition: 0.3s;
}

.nav-links a:hover {
    color: #e67e22;
}

/* Banner */
.banner {
    height: 450px;
    background: linear-gradient(rgba(0,0,0,0.5), rgba(0,0,0,0.5)), 
                url('https://images.unsplash.com/photo-1509048191080-d2984bad6ad5?auto=format&fit=crop&w=1200&q=80');
    background-size: cover;
    background-position: center;
    display: flex;
    justify-content: center;
    align-items: center;
    color: white;
    text-align: center;
}

.banner h1 {
    font-size: 45px;
    margin-bottom: 10px;
}

.btn-main {
    display: inline-block;
    padding: 12px 25px;
    background: #e67e22;
    color: white;
    text-decoration: none;
    border-radius: 5px;
    margin-top: 15px;
}

/* Sản phẩm */
.product-section {
    padding: 50px 5%;
}

.title {
    text-align: center;
    margin-bottom: 40px;
    font-size: 28px;
}

.container {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 20px;
}

.card {
    background: white;
    padding: 20px;
    border-radius: 10px;
    text-align: center;
    box-shadow: 0 4px 8px rgba(0,0,0,0.1);
    transition: 0.3s;
}

.card:hover {
    transform: translateY(-5px);
}

.card img {
    width: 100%;
    height: 300px;
    object-fit: cover;
    border-radius: 5px;
}

.card h3 {
    margin: 15px 0;
}

.price {
    color: #e67e22;
    font-size: 20px;
    font-weight: bold;
    margin-bottom: 15px;
}

.btn-buy {
    width: 100%;
    padding: 10px;
    background: #333;
    color: white;
    border: none;
    border-radius: 5px;
    cursor: pointer;
}

.btn-buy:hover {
    background: #e67e22;
}

/* Footer - Phần của Sơn */
footer {
    background: #1a1a1a;
    color: #bdc3c7;
    text-align: center;
    padding: 30px 0;
    margin-top: 50px;
    border-top: 3px solid #e67e22;
}

footer strong {
    color: #e67e22;
    font-size: 1.1rem;
}

.footer-content p {
    margin-bottom: 5px;
}