/* FOOTER LUXURY BUTTON - ULTIMATE GOLD VERSION */
.footer-wrapper a.button[href*="lien-he"] {
    background: linear-gradient(135deg, #FFD700 0%, #E9B211 50%, #B8860B 100%) !important;
    color: #000 !important;
    border: none !important;
    border-radius: 99px !important;
    font-weight: 900 !important;
    text-transform: uppercase !important;
    letter-spacing: 1.5px !important;
    padding: 14px 35px !important;
    font-size: 14px !important;
    height: auto !important;
    line-height: 1.2 !important;
    display: inline-flex !important;
    align-items: center !important;
    justify-content: center !important;
    gap: 12px !important;
    transition: all 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275) !important;
    box-shadow: 0 10px 30px rgba(233, 178, 17, 0.4) !important;
    position: relative !important;
    overflow: hidden !important;
    margin-top: 15px !important;
    text-decoration: none !important;
}

/* Shimmer Light Effect */
.footer-wrapper a.button[href*="lien-he"]::before {
    content: '';
    position: absolute;
    top: 0; left: -100%;
    width: 100%; height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.8), transparent);
    transition: 0.6s;
    z-index: 1;
}

.footer-wrapper a.button[href*="lien-he"]:hover::before {
    left: 100%;
}

/* Hover State - White Background to pop against Black Footer */
.footer-wrapper a.button[href*="lien-he"]:hover {
    background: #ffffff !important;
    color: #E9B211 !important; /* Chữ vàng trên nền trắng */
    transform: translateY(-5px) scale(1.05);
    box-shadow: 0 20px 40px rgba(255, 255, 255, 0.2) !important;
}

/* FORCE FONT AWESOME ICON - TRY MULTIPLE VERSIONS */
.footer-wrapper a.button[href*="lien-he"] i::before {
    content: "\f1d8" !important; /* fa-paper-plane */
    font-family: "Font Awesome 5 Free", "Font Awesome 6 Free", "Font Awesome 5 Pro" !important;
    font-weight: 900 !important;
    display: inline-block !important;
    font-style: normal !important;
    font-variant: normal !important;
    text-rendering: auto !important;
    -webkit-font-smoothing: antialiased !important;
}

.footer-wrapper a.button[href*="lien-he"] i {
    font-size: 16px !important;
    width: 34px;
    height: 34px;
    background: rgba(0,0,0,0.1);
    display: flex !important;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    transition: all 0.3s;
    margin: 0 !important;
}

.footer-wrapper a.button[href*="lien-he"]:hover i {
    background: #E9B211;
    color: #fff;
    transform: rotate(-15deg) scale(1.1);
}

/* Pulse animation for extra attention */
@keyframes gold-pulse {
    0% { box-shadow: 0 0 0 0 rgba(233, 178, 17, 0.5); }
    70% { box-shadow: 0 0 0 15px rgba(233, 178, 17, 0); }
    100% { box-shadow: 0 0 0 0 rgba(233, 178, 17, 0); }
}

.footer-wrapper a.button[href*="lien-he"] {
    animation: gold-pulse 2s infinite;
}

@media screen and (max-width: 767px) {
    .footer-wrapper a.button[href*="lien-he"] { 
        width: 100% !important;
        padding: 15px 20px !important;
    }
}