```css
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}


body {
    font-family: Arial, Helvetica, sans-serif;
    color: #1d2935;
    line-height: 1.7;
    background: white;
}


.container {
    width: 90%;
    max-width: 1200px;
    margin: auto;
}



/* HEADER */

header {

    background: #ffffff;
    border-bottom: 1px solid #e2e2e2;
    padding: 25px 0;

}


.header-content {

    display: flex;
    justify-content: space-between;
    align-items: center;

}


.logo {

    max-width: 620px;
    height: auto;

}



nav {

    display: flex;
    gap: 30px;

}



nav a {

    text-decoration: none;
    color: #1d2935;
    font-weight: 600;
    font-size: 16px;

}



nav a:hover {

    color: #0066a1;

}





/* HERO */


.hero {

    background: #eef3f7;
    padding: 90px 0;

}



.hero h1 {

    font-size: 44px;
    max-width: 850px;
    margin-bottom: 25px;
    line-height: 1.2;

}



.hero p {

    font-size: 20px;
    max-width: 850px;
    margin-bottom: 35px;

}




.button {

    display: inline-block;
    background: #0066a1;
    color: white;
    padding: 15px 35px;
    border-radius: 4px;
    text-decoration: none;
    font-weight: bold;

}


.button:hover {

    background: #004d78;

}





/* IMAGE BANNER */


.project-image {

    width: 100%;
    overflow: hidden;

}



.project-image img {

    width: 100%;
    height: 420px;
    object-fit: cover;
    display: block;

}







/* SECTIONS */


section {

    padding: 75px 0;

}



h2 {

    font-size: 34px;
    margin-bottom: 35px;

}



h3 {

    font-size: 22px;
    margin-bottom: 15px;

}





/* CARDS */


.cards {

    display: flex;
    gap: 30px;

}



.card {

    flex: 1;
    background: white;
    border: 1px solid #ddd;
    padding: 35px;
    transition: 0.3s;

}



.card:hover {

    transform: translateY(-5px);

}





/* SERVICE LIST */


.service-list {

    margin-left: 25px;
    columns: 2;

}



.service-list li {

    margin-bottom: 10px;

}





.gray {

    background: #f4f5f6;

}





.partner {

    background: #ffffff;

}





/* CONTACT */


#kontakt a {

    color: #0066a1;
    text-decoration: none;

}





/* FOOTER */


footer {

    background: #1d2935;
    color: white;
    padding: 30px 0;
    text-align: center;

}



footer a {

    color: white;

}







/* MOBILE */


@media(max-width:768px){


.header-content {

    flex-direction: column;

}



.logo {

    max-width: 260px;

}



nav {

    margin-top: 25px;
    flex-direction: column;
    gap: 15px;
    text-align: center;

}



.hero h1 {

    font-size: 32px;

}



.cards {

    flex-direction: column;

}



.project-image img {

    height: 250px;

}



.service-list {

    columns: 1;

}


}
nav {

display: flex;
align-items: center;
gap: 35px;

}


.menu-links {

display: flex;
gap: 30px;

}


.language {

border: 1px solid #0066a1;
padding: 8px 18px;
border-radius: 4px;
color: #0066a1;

}



@media(max-width:768px){

nav {

flex-direction: column;

}


.menu-links {

flex-direction: column;
text-align:center;

}

}
```