nav a:hover{
    color:#FBC02D;
}

body{
    margin:0;
    font-family: "Be Vietnam Pro", sans-serif;
    background-color:#FFF8E1;
}

header{
    background:#C62828;
    color:white;
    text-align:center;
    padding:3px;
}

nav{
    background:#2E7D32;
    padding:15px;
    text-align:center;
}

nav a{
    color:white;
    text-decoration:none;
    margin:15px;
    font-weight:bold;
}

footer{
    background:#C62828;
    color:white;
    padding:20px;
}
footer {
    display: block;
    unicode-bidi: isolate;
}
/* Hoa mai rơi */
.flower{
    position:fixed;
    top:-10px;
    font-size:20px;
    animation:fall linear infinite;
    z-index:999;
}

@keyframes fall{
    to{
        transform:translateY(110vh);
    }
}