body {
    background-color: #FFDAB9;
}

img {
    width: 100%;
}

.birth-cover-container {
    position: fixed;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    z-index: 999;
    background: url(../img/background.png) center no-repeat #000;
}

#birth-start-btn {
    width: 50%;
    height: 50px;
    position: fixed;
    left: 50%;
    top: 45%;
    transform: translate(-50%, -50%);
    z-index: 9999999999999999999999;
    font-size: 18px;
    outline: none;
    box-sizing: border-box;
    border-radius: .3em;
    text-transform: uppercase;
    box-shadow: 0 3px 6px rgba(0, 0, 0, .16), 0 3px 6px rgba(110, 80, 20, .4),
        inset 0 -2px 5px 1px rgba(139, 66, 8, 1),
        inset 0 -1px 1px 3px rgba(250, 227, 133, 1);
    border: 1px solid #a55d07;
    color: rgb(120, 50, 5);
    text-shadow: 0 2px 2px rgba(250, 227, 133, 1);
    cursor: pointer;
    transition: all .2s ease-in-out;
    background-size: 100% 100%;
    background: #fff linear-gradient(160deg, #a54e07, #b47e11, #fef1a2, #bc881b, #a54e07) no-repeat center;
}

#birth-start-btn:active {
    background-size: 150% 150%;
    box-shadow: 0 10px 20px rgba(0, 0, 0, 0.19), 0 6px 6px rgba(0, 0, 0, 0.23),
        inset 0 -2px 5px 1px #b17d10,
        inset 0 -1px 1px 3px rgba(250, 227, 133, 1);
    border: 1px solid rgba(165, 93, 7, .6);
    color: rgba(120, 50, 5, .8);
}

#brith-confetti {
    position: absolute;
    left: 0;
    top: 0;
    height: 100%;
    width: 100%;
}

.birth-people-name {
    text-align: center;
    font-size: 70px;
    color: #C4515C;
    letter-spacing: -7px;
    font-weight: 700;
    text-transform: uppercase;
    animation: brith-sway-animation 2s ease-out infinite;
    text-shadow: 0 0 5px #fff, 0 0 7px #fff;
}

.birth-greeting-word {
    font-size: 25px;
    color: #C4515C;
}

.birth-inline-people-name {
    text-transform: capitalize;
}

.birth-cake {
    transform: translate(-50%, -10%);
    left: 50%;
}

.brith-balloon {
    position: fixed;
    top: 100%;
    opacity: 0.5;
    z-index: 99999999;
}

@keyframes brith-sway-animation {
    0% {
        transform: rotateZ(0);
    }

    25% {
        transform: rotateZ(10deg);
    }

    50% {
        transform: rotateZ(0deg);
    }

    75% {
        transform: rotateZ(-10deg);
    }
}