@import url('https://fonts.googleapis.com/css2?family=Poppins:wght@500&display=swap');
*{
margin: 0;
padding: 0;
box-sizing: border-box;
font-family: Poppins;
}
body
{
    background-image: url(img/E7Naj5o.jpg);
    background-size: 2000px;
}
header
{
    z-index: 999;
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 15px 200px;
    transition: 0.5s ease;
}
header .brand
{
    color: mediumvioletred;
    font-size: 1.6em;
    font-weight: 800;
    text-decoration: none;
}
header .navigation
{
    position: relative;
}
header .navigation .navigation-items a
{
    position: relative;
    color: #fff;
    font-size: 1em;
    font-weight: 600;
    text-decoration: none;
    margin-left: 40px;
    transition: 0.3s ease;
}

header .navigation .navigation-items a::before
{
    content: '';
    position: absolute;
    background: rgb(255, 0, 255);
    width: 0;
    height: 2.9px;
    bottom: 0;
    left: 0;
    transition: 0.3s ease;
}
header .navigation .navigation-items a:hover:before
{
    width: 100%;
}
.main-title
{
    position: absolute;
    top: 50%;
    left: 50%;
    margin-right: -50%;
    transform: translate(-50%, -50%)
    
}
.main-title
{
    margin: 0;
    line-height: 1;
    font-size: 15em;
    cursor: pointer;
    color: rgb(171, 67, 255);
    text-shadow: -1px 1px 20px rgba(0, 0, 0, 0.5);
    animation-name: hello;
    animation-duration: 2s;
    transition: .3s;
}
.main-title:hover
{
    font-size: 15.3em;
}
.start
{
    position: absolute;
    top: 50%;
    left: 50%;
    margin-right: -50%;
    transform: translate(-50%, -50%)
}
.start
{
    display: flex;
    color: #fff;
    background: black;
    width: 1920px;
    height: 928px;
    text-align: center;
    justify-content: center;
    align-items: center;
    opacity: 0;
    font-size: 7em;
    animation-name: unko;
    animation-duration: 8s;
}
.p .oh button
{
    background: firebrick;
}
@keyframes hello{
    0% {
        opacity: 0;
        top: 10%;
        color: #ddd;
    }
    100% {
        opacity: 1;
    }
}
@keyframes unko
{
    0% {
        opacity: 8;
    }
}