body {
    text-align: center;
}
img {
    width: 450px;
    opacity: 0.9;
    margin-bottom: 10px;
    border-radius: 10px;
}

h1 {
    color: rgba(139, 0, 0);
    margin-top: 15px;
    margin-bottom: 6px;
}

input:hover {
    border: 3px dotted rgba(139, 0, 0, 0.38);
    color: #3a7999;
    background: rgba(0,0,0,0);
}

img:hover {
    animation: 0.6s ease-in-out 0s normal none infinite running trambling-animation;
}
@keyframes trambling-animation {
    0%, 50%, 100% {
        transform: rotate(0deg);
    }
    10%, 30% {
        transform: rotate(-0.5deg);
    }
    20%, 40% {
        transform: rotate(0.5deg);
    }
}