:root {
    --black:#000;
    --white: #fff;
    --graydark: #333;
    --graymiddle: #666;
    --graywhite: #9E9E9E;
}
@font-face {
    font-family:didact;
    src: url(../fonts/DidactGothic-Regular.ttf);
}
@font-face {
    font-family: fjalla;
    src: url(../fonts/FjallaOne-Regular.ttf);
}
@font-face {
    font-family: worksansregular;
    src: url(../fonts/work-sans.regular.ttf);
}
html {
    font-size: 62.5%;
    scroll-behavior: smooth;
}
* {
    padding: 0;
    margin: 0;
    box-sizing: border-box;
}
/* General Settings für komplette Seite*/
h1, h2, nav a, footer{
    font-family: didact;
} 
header, footer, .more h4 {
    text-align: center;
}
header a,footer a, header p {
    font-size: 16rem;
    color: var(--black);
}
header {
    padding: 2.0rem 36.0rem 15.2rem 36.0rem;
    height:196.1rem;
}
header p, header a, main p, main h3, .more h4, .more .mailbox a  {
    font-family: worksansregular;   
}
.btn, .nr {
    font-family: fjalla;
}
header p{
    font-size: 2.0rem;
    margin-bottom: 6rem;
}
h1 {
    font-size: 10.0rem;
    text-transform: uppercase;
    letter-spacing: 0.2rem;
    margin-bottom: 6rem;
    color:var(--black);
    line-height: 13.0rem;
}
img{
    margin-bottom: 11.8rem;
    width: 72rem;
}
header a{
    text-decoration: none;
    margin-bottom: 15.2rem;
    text-transform: uppercase;
}
/* General Settings für Referenzen */
main p {
    color: var(--graywhite);
    font-size: 2rem;
    margin-bottom: 2rem;
}
main h2 {
    text-transform: uppercase;
    font-size: 11.2rem;
    margin-bottom: 4rem;
}
main h3 {
    color: var(--graywhite);
    font-size: 2rem;
    margin-bottom: 8rem;
}
.btn {
    text-decoration: none;
    font-size: 1.6rem;
    text-transform: uppercase;
    padding:1.6rem 2.6rem;
}
.nr{
    text-align: right;
    font-size: 16.5rem;
    letter-spacing: -0.2rem;
}
/* Referenzen 1 Orbis und 3 Galitos */
.first_project, .third_project{
    padding: 15rem 12rem 10rem 22rem;
    height:82.6rem;
    background: url(../img/portfolio2.jpg) center no-repeat;
    background-size: cover;
    color: var(--white)  
}
.first_project .btn, .third_project .btn{
    color: var(--white);
    border: 2px solid var(--graywhite);
}
.first_project .nr, .third_project .nr {
    color: var(--graywhite);
    filter: opacity(20%);
}
.first_project .btn:hover, .third_project .btn:hover  {
    color: var(--black);
    background-color: var(--white);
    border: 2px solid var(--white);
}
.first_project .btn:hover ~ .nr, .third_project .btn:hover ~ .nr{
    color: var(--white);
    filter: opacity(100%);
}
/* Referenzen 2 Rolls und 4 Tretto */
.second_project, .fourth_project{
    padding: 25rem 12rem 23rem 22rem;
    height:105.6rem;
    background: url(../img/portfolio3.png) center no-repeat;
    background-size: cover;
    color: var(--black)
}
.second_project .btn, .fourth_project .btn{
    color: var(--black);
    border: 2px solid var(--black);
}
.second_project .nr, .fourth_project .nr {
    color: var(--graymiddle);
    filter: opacity(90%);
}
.second_project .btn:hover, .fourth_project .btn:hover {
    color: var(--white);
    background-color: var(--black);
    border: 2px solid var(--black);
}
.second_project .btn:hover ~ .nr, .fourth_project .btn:hover ~ .nr {
    color: var(--black);
    filter: opacity(100%);
}
/* Referenz Galitos */
.third_project {
    background: url(../img/portfolio4.jpg) center no-repeat;
    background-size: cover;
}
/* Referenz Tretto */
.fourth_project {
    background: url(../img/portfolio5.png) center no-repeat;
    background-size: cover;
}
/* More Box mit Email*/
.more {
    background-color: var(--black);
    height: 93.1rem;
    text-align: left;
}
.more h4{
    color:var(--white);
    font-size: 18rem;
    padding:13rem 15.7rem 15rem 15.7rem
}
.more .mailbox {
    padding:0rem 6.94443vw 0rem 44.44441vw;
    letter-spacing: 0.1rem;
    line-height: 4rem;
}
.more .mailbox p{
    margin-bottom: 7rem;
    color: var(--graymiddle);
}
.more .mailbox a{
    font-size: 6rem;
    text-decoration: none;
    color: var(--white);
}
.more .mailbox a:hover{
    text-decoration-line: underline;  
}
/* Footer*/
footer{
    padding:23rem 36.9rem 13rem 36.9rem;
    background-color: var(--white);
    height: 152rem;  
}
footer a {
    display: block;
    margin-bottom: 15rem;
    text-decoration: none;
}
footer a:hover {
    text-decoration-line: underline;  
}
/* Animation Herz */
.heart {
    margin-top: 15rem;
    fill: var(--black);
    width: 2rem;
    animation: pulse 1.2s ease infinite;
  }
  @keyframes pulse {
    0% { transform: scale(1); }
    50% { transform: scale(1.6); }
    100% { transform: scale(1); }
}