/* Reset CSS cơ bản để đồng nhất trên các trình duyệt */
* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

body {
    font-family: Arial, sans-serif;
    line-height: 1.6;
    background-color: #f9f9f9;
}

/* --- FOOTER STYLES --- */
.footer {
    background-color: #ffffff;
    padding: 60px 40px 20px;
    color: #4a4a4a;
    border-top: 1px solid #e1e1e1;
}

.footer-container {
    display: flex;
    flex-wrap: wrap;
    justify-content: space-between;
    max-width: 1200px;
    margin: 0 auto;
    gap: 20px;
}

.footer-col {
    flex: 1;
    min-width: 220px;
}

.footer-col h4 {
    font-size: 18px;
    color: #222;
    margin-bottom: 20px;
    font-weight: bold;
}

.footer-col p {
    font-size: 14px;
    margin-bottom: 10px;
    color: #666;
}

.footer-col p strong {
    color: #222;
}

.footer-col ul {
    list-style: none;
}

.footer-col ul li {
    margin-bottom: 12px;
}

.footer-col ul li a {
    text-decoration: none;
    color: #666;
    font-size: 14px;
    transition: color 0.3s ease;
}

.footer-col ul li a:hover {
    color: #088178; 
}

/* --- ĐÃ FIX: KHÓA KÍCH THƯỚC LOGO CHÍNH --- */
.footer-logo {
    margin-bottom: 20px;
    height: 45px; 
    width: auto; 
    max-width: 100%; 
    object-fit: contain; 
}

.social-title {
    margin-top: 25px;
}

.social-icons a {
    color: #4a4a4a;
    margin-right: 15px;
    font-size: 16px;
    transition: color 0.3s ease;
}

.social-icons a:hover {
    color: #088178;
}

.app-buttons {
    display: flex;
    gap: 10px;
    margin-top: 15px;
    margin-bottom: 20px;
}

/* KHÓA KÍCH THƯỚC LOGO TẢI APP */
.app-buttons img {
    border: 1px solid #088178;
    border-radius: 5px;
    height: 40px; 
    width: 130px;
    object-fit: contain; 
    cursor: pointer;
}

.secure-payment {
    margin-top: 20px;
    margin-bottom: 15px;
}

.payment-icons {
    display: flex;
    gap: 8px;
}

.payment-icons img {
    height: 30px; 
    width: 45px; 
    object-fit: contain; 
}

/* --- COPYRIGHT --- */
.footer-bottom {
    text-align: center;
    margin-top: 40px;
    padding-top: 20px;
    font-size: 14px;
    color: #999;
}

/* --- RESPONSIVE CHO ĐIỆN THOẠI --- */
@media (max-width: 768px) {
    .footer-container {
        flex-direction: column;
    }
    
    .footer-col {
        margin-bottom: 30px;
    }
}