* {
    -webkit-box-sizing: border-box;
    box-sizing: border-box;
    padding: 0;
    margin: 0
}

body {
    width: 100%;
    height: 100vh;
}

img {
    width: 100%;
    display: block
}

.app {
    width: 100%;
    height: 100%;
    position: relative;
}

.myVideo {
    display: block;
    position: relative;
    width: 100%;
    height: 100vh;
    background: #171a3c;
    -webkit-animation: overlay .5s ease;
    animation: overlay .5s ease;
    -webkit-animation-fill-mode: forwards;
    animation-fill-mode: forwards;
    overflow: hidden;
}

a {
    color: #FFFFFF;
    text-align: center;
    text-decoration: none;
}

.baloons {
    display: inline-flex;
    width: 55%;
    height: 81%;
    position: absolute;
    top: 3%;
    left: 40%;

}

.baloon {
    width: 33%;
    position: relative;

}

.baloon img {
    /* animation: baloon 3s ease-in-out;
    animation-iteration-count: infinite; */
}

.baloon:hover {
    z-index: 5;
    cursor: pointer;
}

.b1 {
    position: absolute;
    top: 13%;
    left: 5%;
    transform: translateY(-10px);
}

.b2 {
    position: absolute;
    top: 0;
    left: 29%;
}

.b3 {
    position: absolute;
    top: 16%;
    left: 55%;
}

.red {
    position: absolute;
    top: 0;
    left: 0;
    transition: opacity 0.4s;
}

.yel {
    position: absolute;
    top: 0;
    left: 0;
    transition: opacity 0.4s;
    opacity: 0;
}

.baloon:hover .red {
    opacity: 0;
}

.baloon:hover .yel {
    opacity: 1;
}

.b3 > .yel {
    position: absolute;
    top: -18%;
}

.shadow {
    width: 45%;
    position: absolute;
    top: 93%;
    left: 40%;
}

.modal {
    display: none;
    position: absolute;
    z-index: 6;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    overflow: hidden;
    background-color: rgba(0,0,0,0.4);
}

.modal img {
    display: block;
    margin: 0 auto;
    margin-top: 10%;
    max-width: 55%;
}

.btn {
    display: block;
    position: absolute;
    width: 48%;
    left: 35%;
    top: 49%;
}

#overlay {
    display: none;
    position: fixed;
    width: 100%;
    height: 100%;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: rgba(0,0,0,0.5);
    z-index: 1;
}

@keyframes balloon-rise {
    0%, 100% {
        transform: translateY(0);
    }
    50% {
        transform: translateY(-20px);
    }
}

@keyframes balloon-drop {
    0%, 100% {
        transform: translateY(0px);
    }
    50% {
        transform: translateY(40px);
    }
}

.b1, .b3 {
    animation: balloon-rise 4s infinite;
}

.b2 {
    animation: balloon-drop 4s infinite;
}