@import url('https://fonts.googleapis.com/css2?family=Cinzel:wght@600;700&family=Montserrat:wght@400;500;600&display=swap');

.site-footer {
    background: #070707;
    border-top: 2px solid rgba(212, 175, 55, 0.25);
    padding: 60px 0 30px;
    font-family: 'Montserrat', sans-serif;
    color: #dfdfdf;
    position: relative;
    overflow: hidden;
}

/* Hiệu ứng quầng sáng vàng mờ phía sau để tăng độ sâu thẩm mỹ */
.site-footer::before {
    content: '';
    position: absolute;
    top: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 600px;
    height: 150px;
    background: radial-gradient(circle, rgba(212, 175, 55, 0.08) 0%, transparent 70%);
    pointer-events: none;
    z-index: 0;
}

.footer-container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 20px;
    position: relative;
    z-index: 1;
}

.footer-main {
    display: flex;
    justify-content: space-between;
    gap: 40px;
    margin-bottom: 50px;
    flex-wrap: wrap;
}

/* Brand info column */
.footer-col--brand {
    flex: 1.5;
    min-width: 300px;
}

.footer-logo {
    display: flex;
    align-items: center;
    gap: 15px;
    text-decoration: none;
}

.footer-logo-img {
    height: 70px;
    width: 70px;
    object-fit: contain;
    border-radius: 50%;
    border: 1.5px solid #d4af37;
    box-shadow: 0 0 15px rgba(212, 175, 55, 0.2);
}

.footer-logo-text {
    display: flex;
    flex-direction: column;
}

.footer-logo-title {
    font-family: 'Cinzel', serif;
    font-size: 24px;
    font-weight: 700;
    letter-spacing: 2px;
    background: linear-gradient(135deg, #f3e5ab 0%, #d4af37 50%, #aa7c11 100%);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    line-height: 1.2;
}

.footer-logo-subtitle {
    font-size: 8px;
    font-weight: 600;
    color: #a69c83;
    letter-spacing: 0.5px;
    margin-top: 5px;
    text-transform: uppercase;
    line-height: 1.4;
    max-width: 320px;
}

/* Column titles */
.footer-col-title {
    font-family: 'Cinzel', serif;
    font-size: 16px;
    font-weight: 700;
    color: #d4af37;
    letter-spacing: 1.5px;
    margin: 0 0 20px 0;
    text-transform: uppercase;
    position: relative;
}

.footer-col-title::after {
    content: '';
    position: absolute;
    bottom: -6px;
    left: 0;
    width: 40px;
    height: 1.5px;
    background: #d4af37;
}

/* Links column styling */
.footer-col--links {
    flex: 2;
    min-width: 300px;
}

.footer-links-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
}

.footer-links-list {
    list-style: none;
    padding: 0;
    margin: 0;
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.footer-links-list a {
    color: #b8b8b8;
    text-decoration: none;
    font-size: 13.5px;
    font-weight: 500;
    transition: all 0.25s ease;
    display: inline-block;
}

.footer-links-list a:hover {
    color: #d4af37;
    transform: translateX(4px);
}

/* Social icons column styling */
.footer-col--social {
    flex: 1.5;
    min-width: 250px;
}

.footer-social-icons {
    display: flex;
    gap: 12px;
    flex-wrap: wrap;
}

.social-icon-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    border: 1.5px solid rgba(212, 175, 55, 0.4);
    color: #d4af37;
    text-decoration: none;
    transition: all 0.3s ease;
    background: transparent;
}

.social-icon-btn svg {
    transition: transform 0.3s ease;
}

.social-icon-btn--zalo {
    font-size: 10px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.social-icon-btn:hover {
    background: linear-gradient(135deg, #f3e5ab 0%, #d4af37 50%, #aa7c11 100%);
    color: #000;
    border-color: #d4af37;
    box-shadow: 0 0 15px rgba(212, 175, 55, 0.4);
    transform: translateY(-3px);
}

.social-icon-btn:hover svg {
    transform: scale(1.1);
}

/* Copyright & bottom links styling */
.footer-bottom {
    border-top: 1px solid rgba(212, 175, 55, 0.15);
    padding-top: 25px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 15px;
}

.footer-copyright {
    font-size: 13px;
    color: #888888;
    margin: 0;
}

.footer-bottom-links {
    display: flex;
    align-items: center;
    gap: 10px;
}

.footer-bottom-links a {
    color: #888888;
    text-decoration: none;
    font-size: 13px;
    transition: color 0.25s ease;
}

.footer-bottom-links a:hover {
    color: #d4af37;
}

.footer-bottom-separator {
    color: rgba(212, 175, 55, 0.3);
    font-size: 12px;
}

/* Back to Top button styling */
.back-to-top-btn {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 45px;
    height: 45px;
    border-radius: 50%;
    background: #000;
    border: 1.5px solid #d4af37;
    color: #d4af37;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    z-index: 99;
    opacity: 0;
    visibility: hidden;
    transform: translateY(15px);
    transition: all 0.3s ease;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.5);
}

.back-to-top-btn.visible {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.back-to-top-btn:hover {
    background: linear-gradient(135deg, #f3e5ab 0%, #d4af37 50%, #aa7c11 100%);
    color: #000;
    transform: translateY(-3px);
    box-shadow: 0 6px 20px rgba(212, 175, 55, 0.4);
}

/* Responsive design breakpoints */
@media (max-width: 992px) {
    .footer-main {
        gap: 30px;
    }
    .footer-col--brand {
        flex: 1 1 100%;
        margin-bottom: 10px;
    }
    .footer-col--links {
        flex: 2 1 auto;
    }
    .footer-col--social {
        flex: 1 1 auto;
    }
}

@media (max-width: 768px) {
    .site-footer {
        padding: 50px 0 25px;
    }
    .footer-links-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 15px;
    }
    .footer-bottom {
        flex-direction: column;
        align-items: center;
        text-align: center;
        gap: 10px;
    }
}

@media (max-width: 480px) {
    .footer-logo-title {
        font-size: 20px;
    }
    .footer-links-grid {
        grid-template-columns: 1fr;
        gap: 10px;
    }
    .back-to-top-btn {
        bottom: 20px;
        right: 20px;
        width: 40px;
        height: 40px;
    }
}