:root {
    --main-color: #fefefe;
    --second-color: #b3b300;
    --second-color-hover: #999900;
    --main-bg-color: #1a1a1a;
}

html, body {
    margin: 0;
    height: 100%;
    overflow: hidden;
}

body {
    height: 100%;
    width: 100vw;
    background-color: var(--main-bg-color);
    color: var(--main-color);
    font-family: "Roboto Slab", sans-serif;
}

html::before,
html::after,
body::before,
body::after {
    position: fixed;
    z-index: 8000;
    display: block;
    background: var(--second-color);
    content: "";
}

body::before,
body::after {
    top: 0;
    bottom: 0;
    width: 1px;
}

body::before {
    left: 10px;
}

body::after {
    right: 10px;
}

.side-text {
    position: fixed;
    top: 50%;
    border: none;
    background-color: transparent;
    outline: none;
    font-family: inherit;
    text-decoration: none;
    color: var(--second-color);
    font-size: 0.9em;
    transform: rotate(90deg);
}

.side-text--right {
    width: 100px;
    right: -25px;

}

.side-text--left {
    width: 200px;
    left: -75px;
}

.headline--big {
    font-size: 2.5em;
}

.container--start {
    height: 100%;
}
.container--start > * {
    display: flex;
    align-items: center;
}

.container--start__top {
    height: 90%;
    justify-content: center;
    flex-direction: column;
}

.container--start__bottom {
    height: 10%;
    justify-content: space-evenly;
}

.container--normal {
    margin-top: 10vh;
    text-align: center;
}

.container--underline-center {
    width: fit-content;
    margin: 0 auto;
}

.underline::after {
    display: block;
    width: 45px;
    height: 5px;
    margin: 5px 0 5px 15px;
    background: var(--second-color);
    content: "";
}

.logo--linkedin {
    width: 100%;
    max-width: 130px;
}

.hidden-link {
    text-decoration: none;
    color: inherit;
    cursor: pointer;
}

button {
    margin-top: 50px;
    padding: .5em 1em;
    font-size: inherit;
    border-radius: 5px;
    color: var(--main-bg-color);
    background-color: var(--second-color);
    border: none;
    cursor: pointer;
    box-shadow: 3px 3px 5px 0 var(--second-color-hover);
}
button:hover {
    background-color: var(--second-color-hover);
}

@media screen and (max-width: 420px) {
    body::before {
        left: 7px;
    }

    body::after {
        right: 7px;
    }

    .side-text {
        display: none;
    }
}