:root{
    --main-brand-color: #297AE3;
    --primary-color: #15171C;
    --secondary-color: #2E3744;
    --light-secondary-color: #2E3744;
    --text-color: white;
    --secondary-text-color: #B3B4B6;
}

*{
    padding: 0;
    margin: 0;
}

body{
    background-color: var(--primary-color);
    font-family: Arial, Helvetica, sans-serif;
    font-size: 20px;
    color: var(--text-color);
}

h1{
    font-size: 80px;
    line-height: 115%;
    padding-top: 16px;
    padding-bottom: 6px;
}
h2{
    font-size: 60px;
    line-height: 115%;
    padding-top: 6px;
    padding-bottom: 16px;
}
h3{
    font-size: 40px;
    line-height: 115%;
    padding-bottom: 16px;
    color: var(--text-color);
}
h4{
    font-size: 25px;
    line-height: 115%;
    padding-top: 26px;
    padding-bottom: 20px;
}
p{
    padding-bottom: 10px;
}

.mitte {
    display: flex;
    justify-content: center;
    align-items:center;
}
.mitte1 {
    display: flex;
    padding-left: 350px;
}

section {
    max-width: 1200px;
    margin-left: auto;
    margin-right: auto;
    padding-left: 16px;
    padding-right: 16px;
}
#teaser {
    width: 1280px;
    height: 640px;
    padding-left: 160px;
    padding-right: 16px;
    padding-top: 2px;
    padding-bottom: 2px;
}
#teaser img { 
    width: 80%;
    height: 80%;
}

#blue {
    color: var(--main-brand-color)
}

.popup{
    width: 1280px;
    height: 640px;
    padding-left: 160px;
}
.popup img { 
    width: 80%;
    height: 80%;
}
.popup img:hover {
    border: 4px solid var(--main-brand-color);
}
.popup:hover {
    width: 1293px;
    height: 647px;
}

.popup2{
    display: flex;
    justify-content: center;
    align-items:center;
    gap: 30px;
}

.popup2 img { 
    width: 214px; 
    height: 60px;
}
.popup2 img:hover {
    border: 4px solid var(--main-brand-color);
}
.gray_section {
    width: 100%;
    height: 740px;
    background-color: var(--secondary-color);
}

.gray_section2 {
    width: 100%;
    height: 780px;
    background-color: var(--secondary-color);
}
.gray_section3 {
    width: 100%;
    height: 400px;
    padding-top: 10px;
    background-color: var(--secondary-color);
}
.gray_section4 {
    width: 100%;
    height: 350px;
    padding-top: 10px;
    background-color: var(--secondary-color);
}
.black_section {
    width: 100%;
    height: 750px;
    background-color: var(--primary-color);
}
.black_section2 {
    width: 100%;
    height: 790px;
    background-color: var(--primary-color);
}

aside ul {
    list-style: none;
    display: flex;
    gap: 5px;
    padding-top: 5px;
    padding-bottom: 5px;
}

aside ul li a {
    color: var(--secondary-text-color);
    text-decoration: none;
    position: relative;
    padding: 3px;
}
aside a:hover{
    color: var(--text-color);
}
aside a::after{
    content: '';
    height: 2px;
    width: 0;
    background: var(--main-brand-color);
    position: absolute;
    bottom: 0;
    left: 0;
    transition: 300ms ease-in-out;
}
aside a:hover::after{
    width: 100%;
}

footer {
    padding: 10px 25px;
}