/* ===== Hiệu ứng tim rơi ===== */
.heart{
    position:fixed;
    top:-30px;
    font-size:18px;
    color:#ff4d6d;
    pointer-events:none;
    z-index:9999;
    animation:fall linear forwards;
    text-shadow:0 0 8px rgba(255,77,109,.5);
}

@keyframes fall{
    0%{
        transform:translateY(-20px) translateX(0) rotate(0deg);
        opacity:1;
    }
    100%{
        transform:translateY(110vh) translateX(80px) rotate(360deg);
        opacity:0;
    }
}