html,
body {
  margin: 0;
  position: relative;
}
@keyframes fadeIn {
  from {
    opacity: 0;
  }
  to {
    opacity: 1;
  }
}
body {
  background-image: url('https://raw.githubusercontent.com/LuigiFerraioli/ros2_gazebo_heidelberg/main/images/heidelberg3.png');
  /*background-image: url('../image/background.png'); */
  background-size: cover;
  background-position: center center;
  background-attachment: fixed;
  position: relative;
  font-family: Arial, sans-serif;
  padding-top: 50px;
  padding-bottom: 60px;
  display: flex;
  flex-direction: column;
  justify-content: center;
}
body::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.15);
  z-index: -1;
}
h1 {
  text-align: center;
}
.page-heading {
  text-align: center;
  font-size: 2.5rem;
  font-weight: bold;
  color: #ffffff;
  margin-bottom: 1rem;
  position: relative;
}
.page-heading::after {
  content: '';
  position: absolute;
  left: 50%;
  bottom: -10px;
  width: 50%;
  height: 0.2em;
  background-color: #a30a0a;
  transform: translateX(-50%);
}
/* Begin Index.html */
.profile-image {
  margin-top: 2em;
  width: 20em;
  height: 20em;
  border-radius: 50%;
}
.container {
  opacity: 0;
  animation: fadeIn 1s ease forwards;
}
.container {
  background: white;
  color: black;
  padding: 1%;
  margin: 5em auto;
  min-width: auto;
  width: 40em;
  min-width: 20%;
  max-width: 90%;
  border-radius: 1em;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.2);
  text-align: center;
  transition: width 0.3s ease; /* Animation für fließende Übergänge */
}
.name {
  font-size: 3em;
  font-weight: bold;
}
.degree,
.jobtitle {
  font-size: 1.5em;
  font-weight: bold;
}
.intro {
  font-size: 1em;
  font-weight: bold;
}
/* End Index.html */
/* Begin About.html */
.aboutme-box a {
  color: #a30a0a;
  text-decoration: none;
  font-weight: bold;
}
.aboutme-box a:hover {
  text-decoration: underline;
}
.aboutme-box {
  opacity: 0;
  animation: fadeIn 1s ease forwards;
}
.aboutme-box {
  background-color: white;
  color: black;
  padding: 0 1rem;
  display: flex;
  flex-wrap: wrap;
  width: 100em;
  min-width: 50%;
  max-width: 90%;
  margin: 20px auto;
  border: 1px solid #ccc;
  border-radius: 1em;
  overflow: hidden;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
}
.aboutme-box-head {
  text-align: center;
  font-size: 1.5em;
  font-weight: bold;
}
/* Begin Timeline */
.timeline-container {
  display: flex;
  gap: 2rem;
  margin: 4rem auto;
  max-width: 100em;
  padding: 0 1rem;
}
.column {
  flex: 1;
}
.timeline-entry {
  opacity: 0;
  animation: fadeIn 1s ease forwards;
}
.timeline-entry {
  margin-bottom: 1.5rem;
  padding: 2em;
  background: #f4f4f4;
  border-left: 0.5em solid #a30a0a;
  border-radius: 1em;
}
.year {
  font-weight: bold;
  color: #444;
}
.title {
  font-size: 1.1rem;
  margin-top: 0.2rem;
  color: #000;
}
.description {
  margin-top: 0.5rem;
  font-size: 0.95rem;
  color: #555;
}
.timeline-heading {
  font-size: 1.5rem;
  margin-bottom: 1rem;
  position: relative;
  color: #ffffff;
}
.timeline-heading::after {
  content: '';
  position: absolute;
  bottom: -10px;
  left: 0;
  width: 60%;
  height: 0.2em;
  background-color: #a30a0a;
}
/* End Timeline */
/* End Aboutme.html */
/* Begin Projects.html */
@keyframes slideInRight {
  from {
    transform: translateX(10em);
    opacity: 0;
  }
  to {
    transform: translateX(0);
    opacity: 1;
  }
}
.project-box {
  position: relative;
  background-color: white;
  color: black;
  padding: 1.5em;
  display: flex;
  flex-wrap: wrap;
  width: 1000px;
  max-width: 90%;
  margin: 2em auto;
  border: 1px solid #ccc;
  border-radius: 1em;
  overflow: hidden;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.project-link-overlay {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: 5;
  text-indent: -9999px;
}
.project-text {
  flex: 1;
  padding: 20px;
  background-color: #f9f9f9;
  z-index: 1;
}
.project-text h2 {
  margin-top: 0;
  font-size: 24px;
  text-align: center;
}
.project-text p {
  margin-bottom: 12px;
  line-height: 1.6;
}
.project-image {
  flex: 1;
  background-color: #eee;
  z-index: 1;
}
.project-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.project-box:hover {
  cursor: pointer;
  transform: scale(1.05);
  box-shadow: 0 8px 16px rgba(0, 0, 0, 0.2);
}
/* End Projects.html */
/* Begin Navigation */
nav {
  position: fixed;
  top: 0;
  left: 0;
  height: auto;
  width: 100%;
  background-color: white;
  box-shadow: 0px 2px 4px rgba(0, 0, 0, 0.15);
  z-index: 1000;
}
nav ul {
  float: right;
}
nav li {
  display: inline-block;
  margin-right: 30px;
  margin-right: 40px;
  transition: transform 0.2s ease;
}
nav li a {
  font-family: Arial, Helvetica, sans-serif;
  color: #444;
  text-decoration: none;
  font-size: 1.2em;
  align-items: center;
  transition: color 0.3s ease, transform 0.3s ease;
}
nav li:hover {
  transform: scale(1.1);
}
nav li a:hover {
  color: #ac0808;
  transform: scale(1.1);
}
nav ul li .active {
  background-size: 10px;
  background-position: right center;
  background-repeat: no-repeat;
  padding: 10px;
  background-color: #ac0808;
  color: white;
}
/* End Navigation */

/* Begin Footer */
.site-footer {
  position: fixed;
  bottom: 0;
  left: 0;
  width: 100%;
  height: auto;
  background-color: #f8f8f8;
  padding: 0.3em 0;
  text-align: center;
  box-shadow: 0px -2px 4px rgba(0, 0, 0, 0.1);
  z-index: 1000;
}

.site-footer .footer-content {
  display: flex;
  justify-content: center;
  align-items: center;
  position: relative;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 5em;
}
.site-footer .social-links {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  gap: 1em;
}
.site-footer .social-links li {
  display: inline-block;
}
.site-footer .social-links a {
  color: #444;
  text-decoration: none;
  font-size: 1em;
  transition: color 0.2s;
}
.site-footer .social-links a:hover {
  color: #ac0808;
}
.copyright {
  position: absolute;
  right: 10px;
  color: #666;
  font-size: 0.9em;
}
.social-links img {
  width: 32px;
  height: 32px;
  transition: transform 0.2s ease;
}
.social-links img:hover {
  transform: scale(1.2);
}
/* End Footer */