footer {
    color: white;
    text-align: center;
    padding: 1.5rem;
    margin-top: 3rem;
    border-radius: 20px 20px 0 0;
    font-family: 'Open Sans', sans-serif;
}

footer a {
    color: #4caf50;
    text-decoration: none;
    font-weight: bold;
    transition: all 0.3s ease;
    position: relative;
}

footer a::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 0;
    width: 0;
    height: 2px;
    transition: width 0.3s ease;
}

footer a:hover {
    color: white;
}

footer a:hover::after {
    width: 100%;
}

/* Heart beat animation */
footer::before {
    content: '❣️';
    position: relative;
    display: inline-block;
    animation: heartbeat 1.5s infinite;
    margin-right: 5px;
}

@keyframes heartbeat {
    0% { transform: scale(1); }
    14% { transform: scale(1.3); }
    28% { transform: scale(1); }
    42% { transform: scale(1.3); }
    70% { transform: scale(1); }
}