body{
    background-color: #252526
}






.video{
    text-align: center;
    
}





.tlačítko{
    margin: 0;
    padding: 0;
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    font-family: 'Courier New', Courier, monospace;

    
}

h1{
    text-align: center;
    color: #2193f3;
    padding-bottom: 15%;
} 

a{
    position: relative;
    display: inline-block;
    padding: 15px 30px;
    color: #2193f3;
    text-transform: uppercase;
    letter-spacing: 4px;
    text-decoration: none;
    font-size: 24px;
    overflow: hidden;
    transition: 0.5s;

}
a:hover
{
    color: #255784 ;
    background: #2193f3;
    box-shadow: 0 0 10px, 0 0 40px, 0 0 80px;
    transition-delay: 1s;
}

a span{
    position: absolute;
    display: block;

}

a span:nth-child(1)
{
    top: 0;
    left: -100%;
    width: 100%;
    height: 2px;
    background: linear-gradient(90deg, transparent,#2196f3);

}

a:hover span:nth-child(1)
{
    left: 100%;
    transition: 1s;
}

a span:nth-child(3)
{
    bottom: 0;
    right: -100%;
    width: 100%;
    height: 2px;
    background: linear-gradient(270deg, transparent,#2196f3);

}

a:hover span:nth-child(3)
{
    right: 100%;
    transition: 1s;
    transition-delay: 0.5s;
    
}

a span:nth-child(2)
{
    top: -100%;
    right: 0;
    width: 2px;
    height: 100%;
    background: linear-gradient(180deg, transparent,#2196f3);

}

a:hover span:nth-child(2)
{
    top: 100%;
    transition: 1s;
    transition-delay: 0.25s;
    
    
}

a span:nth-child(4)
{
    bottom: -100%;
    left: 0;
    width: 2px;
    height: 100%;
    background: linear-gradient(360deg, transparent,#2196f3);

}

a:hover span:nth-child(4)
{
    bottom: 100%;
    transition: 1s;
    transition-delay: 0.75s;
    
    
}

#footer{padding:5vh; background-color: #0e79b8;}
#footer p{margin:0; padding:5px; font-size: 20px; text-align: center; color: #EEEEEE; font-weight: 800; font-family: "Roboto", sans-serif;}
#footer p a{margin:0; padding:5px; font-size: 20px; text-decoration: none; color: #000080; font-weight: 900; font-family: "Roboto", sans-serif;}