*{
    margin: 0;
    padding: 0;
    font-family: system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, 'Open Sans', 'Helvetica Neue', sans-serif;
    box-sizing: border-box;
}
body{
    background: black;
    color: white;
}
#header{
    width: 100%;
    height: 100vh;
    background-image: url(images/backgroundindex.jpg);
    background-size: cover;
    background-position: center;
}
.container{
    padding: 20px 1%;
}

nav {
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
}

nav ul li{
    display: inline-block;
    list-style: none;
    margin: 10px 20px;
}

nav ul li a{
    color: white;
    text-decoration: none;
    font-size: 22px;
    position: relative
}

nav.mainmenu ul li a::after {
    content: '';
    width: 110%;
    height: 30px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.5);
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    transition: opacity 0.3s ease;
    opacity: 0;
}

nav.mainmenu ul li a:hover::after {
    opacity: 1;
    width: 100%;
}

nav.mainmenu ul li a::before {
    content: '';
    width: 0;
    height: 3px;
    background: linear-gradient(to right, orange, rgb(255, 69, 100));
    position: absolute;
    left: 0;
    bottom: -6px;
    transition: 0.5s;
}

nav.mainmenu ul li a:hover::before {
    width: 100%;
}

nav.achievements ul li a img {
    padding: 0;
    width: 130px;
    height: 130px;
    border-radius: 50%;
    box-shadow: 0 0 15px white;
    transition: box-shadow 0.3s ease;
}

nav.achievements ul li a:hover img {
    box-shadow: 0 0 20px white, 0 0 0 3px blue
}

.header-text{
    padding: 20px 1%;
    margin-top: 5%;
    margin-bottom: 1.7%;
    font-size: 30px;
}

.header-text h1{
    font-size: 60px;
    margin-top: 20px;
}

.header-text h1 span {
    background: linear-gradient(to right, orange, rgb(255, 69, 100));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;

    display: inline-block;
    position: relative;
    animation: wave 1.5s linear infinite;
}

@keyframes wave {
    0% {
      transform: translateY(0);
    }
    50% {
      transform: translateY(-10px);
    }
    100% {
      transform: translateY(0);
    }
}

p.about-me-paragraph{
    padding-top: 10px;
}