* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  text-decoration: none;
  border: none;
  outline: none;
  scroll-behavior: smooth;
  font-family: "Poppins", sans-serif;
}

:root {
  /** Color-Schemes
   * (bg-color, second-bg-color, text-color, accent-color, accent-color2)
   * Nike Schuhe: #040509, #1f1e23, #e5dee6, #5eb9bc, #ff4136
   + Design 1: #313228, #3b4145, #fffbdc, #00b9f7, #00b9f7 bzw. #ed3641
   */
  --bg-color: #040509;
  --second-bg-color: #1f1e23;
  --text-color: #e5dee6;
  --accent-color: #5eb9bc;
  --accent-color2: #ff4136;
}

html {
  overflow-x: hidden;
  font-size: 62.5%;
}

body {
  background-color: var(--bg-color);
  color: var(--text-color);
}

/** Header */
.header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  padding: 2rem 9%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  z-index: 100;
  background: transparent;
  transition: 0.3s;
}

.header.sticky {
  background-color: var(--bg-color);
}

.header img {
  max-height: 48px;
}
.header img#mobil {
  display: none;
}
.header img#web {
  display: inherit;
}

#menu-item {
  font-size: 3.7rem;
  color: var(--text-color);
  cursor: pointer;
  display: none;
}

.navbar a {
  color: var(--text-color);
  font-size: 1.7rem;
  font-weight: 500;
  margin-left: 3.5rem;
  transition: 0.3s;
}

.navbar a:hover,
a.active {
  color: var(--accent-color);
}

.navbar a::before {
  content: "";
  width: 100%;
  height: 100%;
  color: var(--accent-color);
}
/** End Header */

/** Main */
section {
  min-height: 100vh;
  padding: 10rem 9% 2rem;
}

.home {
  display: flex;
  align-items: center;
}

.home .bg-image {
  position: absolute;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  background-image: url("background1.png");
  background-repeat: no-repeat;
  background-size: cover;
  background-position: center;
  opacity: 0.2;
  z-index: -9999;
}

.home-content {
  flex: 0 0 100%;
  text-align: center;
}

.home-content h1 {
  font-size: 4.8rem;
  font-weight: 700;
  line-height: 1.3;
}

.home-content p {
  font-size: 1.6rem;
  margin: 2rem 0 4rem;
}

.home-content span {
  color: var(--accent-color);
}

.home-sci {
  position: absolute;
  bottom: 4rem;
  width: 170px;
  display: flex;
  justify-content: space-between;
}

.home-sci a {
  position: relative;
  display: inline-flex;
  justify-content: center;
  align-items: center;
  width: 40px;
  height: 40px;
  background: transparent;
  border: 0.2rem solid var(--accent-color);
  border-radius: 50%;
  font-size: 20px;
  color: var(--accent-color);
  z-index: 1;
  overflow: hidden;
}

.home-sci a:hover {
  color: var(--bg-color);
}

.home-sci a::before {
  content: "";
  background-color: var(--accent-color);
  position: absolute;
  top: 0;
  left: 0;
  width: 0;
  height: 100%;
  z-index: -1;
  transition: 0.5s;
}

.home-sci a:hover::before {
  width: 100%;
}

.btn-box {
  position: relative;
  display: flex;
  justify-content: space-between;
  width: 34.5rem;
  height: 5rem;
}

.btn-box .btn {
  position: relative;
  display: inline-flex;
  justify-content: center;
  align-items: center;
  width: 15rem;
  height: 100%;
  background: var(--accent-color);
  border: 0.2rem solid var(--accent-color);
  border-radius: 0.8rem;
  font-size: 1.8rem;
  font-weight: 600;
  letter-spacing: 0.1rem;
  color: var(--bg-color);
  z-index: 1;
  overflow: hidden;
}

.btn-box .btn:hover {
  color: var(--text-color);
}

.btn-box .btn::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 0;
  height: 100%;
  background-color: var(--bg-color);
  z-index: -1;
  transition: 0.5s;
}

.btn-box .btn:hover::before {
  width: 100%;
}

.heading {
  font-size: 5rem;
  margin-bottom: 3rem;
  text-align: center;
}

.heading span {
  color: var(--accent-color);
}

.projects .heading span {
  color: var(--accent-color2);
}

.projects .subheading {
  font-size: 1.68rem;
  margin-bottom: 2.5rem;
  text-align: center;
}

.vita,
.projects {
  display: flex;
  justify-content: center;
  flex-direction: column;
  min-height: auto;
  padding-bottom: 5rem;
}

.vita .vita-row,
.projects .projects-row,
.impressum .impressum-row,
.skills .skills-row {
  display: flex;
  flex-wrap: wrap;
  gap: 5rem;
}

.vita-row .vita-column,
.projects-row .projects-column,
.skills-row .skills-column,
.impressum-row .impressum-column {
  flex: 1 1 40rem;
}

.vita-column .title,
.projects-column .title,
.impressum-column .title {
  font-size: 2.5rem;
  margin: 0 0 1.5rem 2rem;
}

.vita-column .vita-box {
  border-left: 0.2rem solid var(--accent-color);
}

.vita-box .vita-content,
.projects-box .projects-content,
.impressum-box .impressum-content {
  position: relative;
  padding-left: 2rem;
}

.vita-box .vita-content::before {
  content: "";
  position: absolute;
  top: 0;
  left: -1.1rem;
  width: 2rem;
  height: 2rem;
  background-color: var(--accent-color);
  border-radius: 50%;
}

.vita-content .content,
.projects-content .content {
  position: relative;
  padding: 1.5rem;
  border-radius: 0.6rem;
  margin-bottom: 2rem;
  overflow: hidden;
  z-index: 1;
}

.vita-content .content {
  border: 0.2rem solid var(--accent-color);
}

.projects-content .content {
  border: 0.2rem solid var(--accent-color2);
}

.vita-content .content::before,
.projects-content .content::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 0;
  height: 100%;
  background: var(--second-bg-color);
  z-index: -1;
  transition: 0.5s;
}

.vita-content .content:hover::before,
.projects-content .content:hover::before {
  width: 100%;
}

.vita-content .content .year {
  font-size: 1.5rem;
  color: var(--accent-color);
  padding-bottom: 0.5rem;
}
.projects-content .content h2 {
  font-size: 1.5rem;
  color: var(--accent-color2);
  padding-bottom: 0.5rem;
}

.vita-content .content .year i,
.projects-content .content h3 i {
  padding-right: 0.5rem;
}

.projects-content .content h3 span {
  font-size: 1.25rem;
  padding-left: 0.5rem;
  color: var(--accent-color2);
}

.vita-content .content h3,
.projects-content .content h3,
.impressum-content .content h3 {
  font-size: 2rem;
}

.vita-content .content p,
.projects-content .content p,
.impressum-content .content p,
.impressum-content .content address {
  font-size: 1.6rem;
  padding-top: 0.5rem;
}

.projects-content .content p a {
  color: var(--text-color);
  text-decoration: underline;
}

.projects-row .projects-column .projects-imagebox {
  align-items: center;
  margin: 1.5rem;
  position: relative;
  display: flex;
}

.projects-row .projects-column .projects-imagebox p {
  text-align: center;
  font-size: 1.6rem;
  position: absolute;
  bottom: 0;
  padding: 0.5rem;
  width: 100%;
  background-color: rgba(0, 0, 0, 0.75);
  color: var(--accent-color2);
}

.projects-row .projects-column .projects-imagebox img {
  width: 100%;
  height: auto;
  background: var(--second-bg-color);
}

.impressum-content .content address strong {
  color: var(--accent-color);
}

.impressum-content .content li {
  font-size: 1.6rem;
  margin-left: 2rem;
}

.impressum-content .content a {
  color: var(--text-color);
  text-decoration: underline;
}

.skills {
  padding-bottom: 7rem;
  background: var(--second-bg-color);
}

.skills-column .title {
  font-size: 2.5rem;
  margin: 0 0 1.5rem;
}

.skills-box .skills-content {
  position: relative;
  border: 0.2rem solid var(--accent-color);
  border-radius: 0.6rem;
  padding: 0.5rem 1.5rem;
  overflow: hidden;
  z-index: 1;
}

.skills-box .skills-content::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 0;
  height: 100%;
  background: var(--bg-color);
  z-index: -1;
  transition: 0.5s;
}

.skills-box .skills-content:hover::before {
  width: 100%;
}

.skills-content .progress {
  padding: 1rem 0;
}

.skills-content .progress h3 {
  font-size: 1.7rem;
  display: flex;
  justify-content: space-between;
}

.skills-content .progress h3 span {
  color: var(--text-color);
}

.skills-content .progress .bar {
  height: 2.5rem;
  border-radius: 0.6rem;
  border: 0.2rem solid var(--accent-color);
  padding: 0.5rem;
  margin: 1rem 0;
}

.skills-content .progress .bar span {
  display: block;
  height: 100%;
  border-radius: 0.3rem;
  background: var(--accent-color2);
}

.impressum {
  display: flex;
  justify-content: center;
  flex-direction: column;
  min-height: auto;
  padding-bottom: 5rem;
}

.impressum .impressum-row {
  padding-bottom: 2.5rem;
}

.contact {
  background: var(--second-bg-color);
  min-height: auto;
  padding-bottom: 7rem;
}

.contact form {
  max-width: 70rem;
  margin: 0 auto;
  text-align: center;
}

.contact form .input-box {
  position: relative;
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
}

.contact form .input-box .input-field {
  position: relative;
  width: 49%;
  margin: 0.8rem 0;
}

.contact form .input-box .input-field input,
.contact form .textarea-field textarea {
  width: 100%;
  height: 100%;
  padding: 1.5rem;
  font-size: 1.6rem;
  color: var(--text-color);
  background: transparent;
  border-radius: 0.6rem;
  border: 0.2rem solid var(--accent-color);
}

.contact form label {
  font-size: 1.6rem;
}

.contact form label a {
  color: var(--text-color);
  text-decoration: underline;
}

.contact form label input[type="checkbox"] {
  -webkit-appearance: none;
  appearance: none;
  background-color: var(--bg-color);
  margin: 0;
  font: inherit;
  color: var(--accent-color);
  width: 1.15em;
  height: 1.15em;
  border: 0.15em solid var(--accent-color);
  border-radius: 0.15em;
  transform: translateY(-0.075em);
  display: grid;
  place-content: center;
}

.contact form label input[type="checkbox"]::before {
  content: "";
  width: 0.65em;
  height: 0.65em;
  transform: scale(0);
  transition: 120ms transform ease-in-out;
  box-shadow: inset 1em 1em var(--accent-color);
}

.contact form label input[type="checkbox"]:checked::before {
  transform: scale(1);

  transform-origin: bottom left;
  clip-path: polygon(14% 44%, 0 65%, 50% 100%, 100% 16%, 80% 0%, 43% 62%);
}

.contact form .checkbox-field:nth-child(1) {
  width: 5%;
}

.contact form .checkbox-field:nth-child(2) {
  width: 94%;
}

.contact form .input-box .input-field input::placeholder,
.contact form .textarea-field textarea::placeholder {
  color: var(--text-color);
  background-color: transparent;
  font-weight: 500;
}

.contact form .textarea-field {
  position: relative;
  margin: 0.8rem 0 2.7rem;
  display: flex;
}

.contact form .textarea-field textarea {
  resize: none;
}

div.input-box:nth-child(2) > div:nth-child(1) {
  width: 100%;
}

div.input-box:nth-child(2) > div:nth-child(2) {
  height: 0;
  width: 0;
}

div.input-box:nth-child(2) > div:nth-child(2) input {
  border: none;
}

.contact form .btn-box {
  display: inherit;
}

.contact form .btn-box.btns {
  margin: 2.5rem auto;
}

.contact form .btn-box.btns .btn {
  cursor: pointer;
}

.contact form .btn-box.btns .btn::before {
  background-color: var(--second-bg-color);
}

.contact-success p {
  text-align: center;
  font-size: 3rem;
  font-weight: 700;
  line-height: 1.3;
  color: var(--accent-color);
  padding-bottom: 7rem;
  padding-top: 7rem;
}

.hidden {
  display: none;
}

.footer {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  padding: 2rem 9%;
  background-color: var(--bg-color);
}

.footer.alternativefooter {
  background-color: var(--second-bg-color) !important;
}

.footer-text p {
  font-size: 1.6rem;
}

.footer-text p a {
  color: var(--text-color);
  text-decoration: underline;
}

.footer-iconTop a {
  position: relative;
  display: inline-flex;
  justify-content: center;
  align-items: center;
  padding: 0.8rem;
  background: var(--accent-color);
  border: 0.2rem solid var(--accent-color);
  border-radius: 0.6rem;
  z-index: 1;
  overflow: hidden;
}

.footer-iconTop a i {
  font-size: 2.4rem;
  color: var(--bg-color);
  transition: 0.5s;
}

.footer.alternativefooter .footer-iconTop a i {
  color: var(--second-bg-color);
}

.footer-iconTop a::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 0;
  height: 100%;
  background: var(--bg-color);
  z-index: -1;
  transition: 0.5s;
}

.footer-iconTop a:hover::before {
  width: 100%;
}

.footer-iconTop a:hover i,
.footer.alternativefooter .footer-iconTop a:hover i {
  color: var(--text-color);
}

/** End Main */

@media (max-width: 1200px) {
  html {
    font-size: 55%;
  }
}

@media (max-width: 991px) {
  .header {
    padding: 2rem 4%;
  }

  section {
    padding: 10rem 4% 2rem;
  }

  .home {
    padding: 0 4%;
  }

  .footer {
    padding: 2rem 4%;
  }
}

@media (max-width: 768px) {
  .header {
    background-color: var(--bg-color);
  }
  .header img#mobil {
    display: inherit;
  }
  .header img#web {
    display: none;
  }
  .navbar {
    position: absolute;
    top: 100%;
    left: -100%;
    width: 100%;
    padding: 1rem 4%;
    background: var(--accent-color);
    box-shadow: 0 0.5rem 1rem rgba(0, 0, 0, 0.2);
    z-index: 1;
    transition: 0.25s ease;
    transition-delay: 0.25s;
  }
  .navbar.active {
    transition-delay: 0s;
    left: 0;
  }
  .navbar .active-nav {
    position: absolute;
    left: -100%;
    top: 0;
    width: 100%;
    height: 100%;
    background: var(--bg-color);
    border-top: 0.1rem solid rgba(0, 0, 0, 0.2);
    z-index: -1;
    transition: 0.25s ease;
    transition-delay: 0s;
  }
  .navbar.active .active-nav {
    transition-delay: 0.25s;
    left: 0;
  }
  .navbar a {
    display: block;
    font-size: 2rem;
    margin: 3rem 0;
    transform: translateX(-20rem);
    transition: 0.25s ease;
    transition-delay: 0s;
  }
  .navbar.active a {
    transform: translateX(0);
    transition-delay: 0.25s;
  }
  #menu-item {
    display: inherit;
  }
  .home-sci {
    width: calc(100% - 20%);
  }

  .vita-row .vita-column:nth-child(1) {
    order: 2;
  }
  .vita-row .vita-column:nth-child(2) {
    order: 1;
  }

  .contact .heading {
    font-size: 3.2rem;
  }

  .impressum-row:nth-child(2) .impressum-column:nth-child(1) {
    order: 2;
  }

  .impressum-row:nth-child(2) .impressum-column:nth-child(2) {
    order: 1;
    text-align: center;
  }
  .impressum-row:nth-child(2) .impressum-column:nth-child(2) .content {
    display: flex;
  }

  #logo-big {
    float: left !important;
    margin: 0 auto;
  }
}