.footer {
    background-color: #333;
    color: white;
    padding: 50px 0 20px;
    margin-top: auto;
}

.footer .container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 15px;
}

.footer-wrapper {
    display: flex;
    /* FIX QUAN TRỌNG: Dùng row để chia cột ngang */
    flex-direction: row;
    flex-wrap: wrap;
    justify-content: space-between;
    gap: 30px;
}

.footer-section {
    flex: 1; /* Chia đều cột */
    min-width: 250px;
    margin-bottom: 20px;
}

.footer-section h4 {
    font-size: 18px;
    margin-bottom: 20px;
    color: #ff6b6b; /* Màu tiêu đề footer */
    font-weight: bold;
    text-transform: uppercase;
    border-bottom: 2px solid #555;
    padding-bottom: 10px;
    display: inline-block;
}

.footer-section ul {
    list-style: none;
    padding: 0;
    margin: 0;
}

.footer-section ul li {
    margin-bottom: 10px;
    color: #ccc;
    font-size: 14px;
}

.social-icons {
    display: flex;
    gap: 15px;
}

.social-icons a {
    color: white;
    font-size: 18px;
    width: 36px;
    height: 36px;
    background: #555;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    text-decoration: none;
    transition: all 0.3s;
}

.social-icons a:hover {
    background-color: #ff6b6b;
    transform: translateY(-3px);
}

.footer-bottom {
    margin-top: 30px;
    padding-top: 20px;
    border-top: 1px solid #444;
    text-align: center;
    font-size: 13px;
    color: #888;
}