@import url('https://fonts.googleapis.com/css2?family=Roboto+Slab&family=Satisfy&display=swap');
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Roboto Slab', sans-serif;
}
body
{
    background: #1a2433;
    min-height: 200vh;
}
header
{
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    display: flex;
    justify-content: space-between;
    align-items: center;
    transition: 0.6s;
    padding: 40px 100px;
    z-index: 100000;
}
header.sticky
{
    padding: 5px 100px;
    background: #587195;
}
header .logo
{
    position: relative;
    transition: 0.6s;
}
header .logo img
{
    width: 250px;
    height: 100px;
}
header ul
{
    position: relative;
    display: flex;
    justify-content: center;
    align-items: center;
    font-size: 1.5em;
}
header ul li
{
    position: relative;
    list-style: none;
}
header ul li a
{
    position: relative;
    margin: 0 15px;
    text-decoration: none;
    color: #fff;
    letter-spacing: 2px;
    font-weight: 500px;
    transition: 0.6s;
}
.banner
{
    position: relative;
    width: 100%;
    height: 100vh;
}
header.sticky .logo,
header.sticky ul li a
{
    color: #1a2433;
}