:root {
    --font-color1: rgb(58, 58, 61);
    --font-color2: rgb(37, 160, 64);
    --font-color3: rgb(214, 219, 212);
    --font-color4: rgb(36, 33, 33);
    --background-color1: rgba(58, 58, 61, 0.98);
    --background-color2: rgba(37, 160, 64, 0.5);
}

* {
    box-sizing: border-box;
}

/** Breakpoint: 576px+ */
@media (min-width: 36em) {}

/** Breakpoint: 768px+ */
@media (min-width: 48em) {}

/** Breakpoint: 992px+ */
@media (min-width: 62em) {}

/** Breakpoint: 1200px+ */
@media (min-width: 75em) {}

/** Breakpoint: 1400px+ */
@media (min-width: 87.5em) {}

html {
    font-size: 0.7em;
}

@media (min-width: 48em) {
    html {
        font-size: 1em;
    }
}

@media (min-width: 75em) {
    html {
        font-size: 1.2em;
    }
}

body {
    font-family: "nunito", sans-serif;
    background-color: rgb(240, 240, 240);
    background-image: linear-gradient(90deg, rgba(37, 160, 64, 0.4) 0%, rgba(242,242,248,1) 30%, rgba(242,242,248,1) 70%, rgba(37,160,64,0.4) 100%);
    margin: 0;
    padding: 0;
}

.container {
    max-width: 75rem;
    margin-left: auto;
    margin-right: auto;
    padding: 1rem 2rem;
    
}

@media (min-width: 48em) {
    .container {
        padding-left: 2rem;
        padding-right: 2rem;
    }
}

.section__title {
    margin: 0;
    padding: 2rem 0 1rem 0;
    color: var(--font-color2);
    font-size: 2rem;
    text-transform: uppercase;
    letter-spacing: 0.125rem;
    text-align: center;
}

.section__sub-title {
    margin: 0;
    padding: 1.5rem 0 0.5rem 0;
    color: var(--font-color1);
    font-size: 1.2rem;
}

.section__paragraph-title {
    margin: 0;
    color: var(--font-color1);
    font-weight: bold;
    padding: 0.5rem 0;
}

.section__paragraph-sub-title {
    margin: 0;
    color: var(--font-color1);
    font-weight: bold;
    font-size: 0.9rem;
    padding: 0.5rem 0;
}

.paragraph {
    color: var(--font-color1);
    line-height: 1.4rem;
    margin: 0;
    padding: 0.5rem 0;
}

.paragraph--center {
    text-align: center;
}

.paragraph__list {
    color: var(--font-color1);
    list-style-type: square;
}

.bold {
    font-weight: 500;
}

.link {
    text-decoration: none;
    color: var(--font-color2);
}

.header__nav {
    background-color: var(--background-color1);
    position: fixed;
    top: 0;
    right: 0;
    left: 0;
    z-index: 1;
    box-shadow: 0.1rem 0.3rem 0.3rem rgba(0, 0, 0, 0.4);
}

.header__nav-ul {
    max-width: 75rem;
    margin-top: 0;
    margin-bottom: 0;
    margin-left: auto;
    margin-right: auto;
    text-align: center;
    padding: 0.5rem 0 0.5rem 1rem;
}

@media (min-width: 62em) {
    .header__nav-ul {
        text-align: left;
    }
}
 
.header__nav-li {
    display: inline-block;
    list-style-type: none;
}

.header__nav-link {
    display: inline-block;
    text-decoration: none;
    color: var(--font-color3);
    font-weight: bold;
    text-transform: uppercase;
    letter-spacing: 0.125rem;
    padding: 0.5rem 0.5rem;
}

@media (min-width: 62em) {
    .header__nav-link {
        padding: 1rem 1rem; 
    }
}

.header__nav-li:hover {
    background-color: var(--background-color2);
}

.header__nav-link:hover {
    color: var(--font-color1);
}

.header__title {
    background-image: url(../images/tribune_green_middle.jpg);
    background-repeat: no-repeat;
    background-size: cover;
    background-position: 0% 10%;
    padding-top: 6rem;
    padding-bottom: 3rem;
}

.header__title-box {
    display: inline-block;
    margin-left: auto;
    margin-right: auto;
    background-color: rgb(0, 100, 0, 0.2);
    -webkit-backdrop-filter: blur(0.5rem);
    backdrop-filter: blur(0.5rem);
    padding: 1rem;
    box-shadow: 0.2rem 0.2rem rgba(0, 0, 0, 0.3);
}

.header__title-text {
    margin: 0;
    color: var(--font-color3);
    text-shadow: 0.1rem 0.1rem rgba(47, 46, 46, 0.806);
    font-size: 2.1rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.portfolio__box {
    display: flex;
    flex-direction: row-reverse;
    color: var(--font-color1);
    padding: 1.5rem 0;
}

.portfolio__icon-box {
    margin: 0 2.5rem 0 0;
}

.about__box {
    display: flex;
    justify-content: center;
    align-items: flex-start;
    flex-wrap: wrap;
}

@media (min-width: 48em) {
    .about__box {
        flex-wrap: nowrap;
    }
}

.about__image-box {
    border-radius: 0.2rem;
    box-shadow: 0 0.5rem 1rem rgba(0, 0, 0, 0.25);
    overflow: hidden;
    margin: 1.8rem 1rem;
    flex: 0 0 15%;
}

.about__image {
    display: block;
    width: 100%;
    object-fit: cover;
}

.about__description-box {
    padding-left: 2rem;
}

.referenz__list {
    text-align: center;
    list-style-type: none;
    padding-left: 0.5rem;
    line-height: 1.8rem;
    color: var(--font-color1);
}

.footer {
    background-color: rgba(58, 58, 61, 0.98);
    height: 3rem;
    width: 100%;
}

.footer__image {
    width: 1rem;
    height: 1rem;
}