* {
    margin: 0;
    padding: 0;
    font-family: Arial, Helvetica, sans-serif;
}

/*--BACKGROUND--*/
.hero {
    width: 100%;
    height: 100vh;
    background-color: #000;
    /* background-image: url(/img/background.png); */
    background-size: cover;
    background-position: center;
    transition: background-image 1s ease-in-out;
    position: relative;
    overflow: hidden;
}

/*--LOGO-BUTTON--*/
.logo {
    width: 250px;
    cursor: pointer;
}
.nav-bar {
    width: 85%;
    height: 15%;
    margin: auto;
    display: flex;
    align-items: center;
    justify-content: space-between;
}
button {
    background: transparent;
    color: #fbfcfd;
    display: flex;
    border-radius: 25px;
    padding: 10px 25px;
    border: 1px solid #fbfcfd;
    cursor: pointer;
    outline: none;
    transition: 1.4s;
}
button:hover {
    background-color: #fbfcfd;
    color: rgb(0, 0, 0);
}

/*--CONTENT--*/
.content {
    color: #fbfcfd;
    position: absolute;
    top: 50%;
    left: 8%;
    transform: translateY(-50%);
    z-index: 2;
}
h1 {
    font-size: 80px;
    margin: 10px 0 30px;
    line-height: 80px;
}

/*--SIDE-BAR--*/
.side-bar {
    width: 50px;
    height: 100vh;
    background: linear-gradient(#646464, #090909);
    position: absolute; 
    right: 0;
    top: 0;
}
.menu {
    display: block;
    width: 25px;
    margin: 40px auto 0;
    cursor: pointer;
}
.social-links img, .useful-links img{
    width: 25px;
    margin: 5px auto;
    cursor: pointer;
}

.social-links {
    width: 49px;
    position: absolute;
    text-align: center;
    top: 50%;
    transform: translateY(-50%);
}

.useful-links {
    width: 50px;
    position: absolute;
    text-align: center;
    bottom: 30px;
}

/*--BUBBLES-ANIMATION--*/
.bubbles img {
    width: 50px;
    animation: bubbles 7s linear infinite;
}
.bubbles {
    width: 100%;
    align-items: center;
    justify-content: space-around;
    display: flex;
    position: absolute;
    bottom: -70px;
}
@keyframes bubbles {
    0%{
        transform: translateY(0%);
        opacity: 0;
    }
    50%{
        opacity: 1;
    }
    70%{
        opacity: 1;
    }
    100%{
        transform: translateY(-80vh);
        opacity: 0;
    }
}
/*--BUBBLES-ANIMATION-DELAY--*/
.bubbles img:nth-child(1){
    animation-delay: 2s;
    width: 25px;
}
.bubbles img:nth-child(2){
    animation-delay: 1s;
    width: 20px;
}
.bubbles img:nth-child(3){
    animation-delay: 3s;
    width: 25px;
}
.bubbles img:nth-child(4){
    animation-delay: 4.5s;
}
.bubbles img:nth-child(5){
    animation-delay: 3.2s;
    width: 28px;
}
.bubbles img:nth-child(6){
    animation-delay: 6s;
}
.bubbles img:nth-child(7){
    animation-delay: 7s;
    width: 35px;
}


.access_data{
    margin-top:30px;
    font-size: 1.5em;
}