body {
    margin: 0;
    padding: 0;
    font-family: 'Roboto', sans-serif; 
    font-weight: 100; 
    background-color: #1e1e1e;
    color: #ffffff;
}

header {
    padding-top: 3rem;
    padding-left: 2rem; 
    padding-right: 8rem; 
    padding-bottom: 1rem; 
    text-align: right;
}

#nav button {
    font-family: 'Roboto', sans-serif;
    font-weight: 100; 
    margin-left: 70px;
    color: #ffffff;
    font-size: 1.7rem;
    transition: color 0.3s;
    background: none;
    border: none;
    cursor: pointer; 
}

#nav button:hover {
    color: #1e90ff;
}

#nav .activeBtn {
    color: #1e90ff;
}

main {

    padding: 2rem;
}

.top-div {
    gap: 150px;
    display: flex;
    justify-content: center; 
    align-items: center;
}

#menu-container {
    position: relative;
    display: flex;
    justify-content: center;
    align-items: center;
    width: 100%;
    height: 750px; 
    overflow: hidden;  
}

#menu-container > :nth-last-child(-n+3) {
    width: 800px;
    height: 800px;
    position: absolute; 
    top: 0;  
    left: 0;
}

#menu-container > * .hidden{
    transition: opacity 1s ease, transform 0.5s ease;  
} 

.visible {
    opacity: 1;  
    visibility: visible;  
    transition: opacity 1s ease, transform 0.5s ease;  
}

.hidden {
    opacity: 0;  
    visibility: hidden;  
    transition: opacity 1s ease, transform 0.5s ease;
}


#text-container{
    padding-left: 4rem;
    width: 650px;
}

#presentation {
    width: 1000px;
    text-align: left;
    margin-bottom: 2rem;
}

#presentation p {
    margin: 0.5rem 0;
    font-size: 3.03rem;
}

#pres-name {
    font-size: 4.7rem;
}

#presentation .name-highlight {
    font-weight: bold;
    color: #1e90ff;
}

#synopsis {
    color: #b9b9b9;
    width: 650px; 
    margin-top: 5rem;
    margin-left: 0; 
    margin-right: auto; 
    font-size: 1.2rem;
    line-height: 1.6;
    text-align: left; 
}

footer {
    text-align: center;
}

footer p {
    color: #ffffff;
    font-size: 0.9rem;
}

#kali-container {
    margin-left: -50px;
    position: relative;
    width: 55%;
    height: 420px;
    display: flex;
    justify-content: center;
    align-items: center;
}

#center-logo {
    z-index: 3;
    position: absolute;
    width: 300px;
    height: 300px;
    animation: tremble 5s infinite ease-in-out;
}

#center-logo img {
    width: 100%;
    height: 100%;
    border-radius: 50%;
    box-shadow: 0px 0px 20px rgba(0, 0, 0, 0.9); 
    transition: transform 0.1s ease; 
}

@keyframes tremble {
    0% { transform: translate(0, 0); }
    25% { transform: translate(3px, -2px); }
    50% { transform: translate(-3px, 2px); }
    75% { transform: translate(2px, 3px); }
    100% { transform: translate(0, 0); }
}


.button-link {
    display: inline-block; 
    text-decoration: none; 
}

.button {
    z-index: 2;
    display: flex;
    justify-content: center;
    align-items: center;
    width: 150px;
    height: 150px;
    background: linear-gradient(60deg, #6cb8f7, #2777ff);
    color: white;
    border-radius: 50%;
    font-size: 1.2rem;
    font-weight: bold;
    cursor: pointer;
    transition: transform 0.2s ease-out;
    box-shadow: 0px 0px 20px rgba(0, 0, 0, 0.9);
}

.button-group {
    z-index: 1  ;
    display: flex;
    flex-wrap: wrap; 
    justify-content: center;
    gap: 20px; 
}

.button-group {
    position: relative;
    width: 800px;
    height: 800px; 
}

.button {
    appearance: button;
    border-radius: 50%;
    border-width: 0 0 4px;
    box-sizing: border-box;
    color: #FFFFFF;
    cursor: pointer;
    display: flex;
    justify-content: center;
    align-items: center;
    font-family: din-round, sans-serif;
    font-size: 1.2rem;
    font-weight: bold;
    letter-spacing: .8px;
    line-height: 20px;
    margin: 0;
    outline: none;
    overflow: visible;
    padding: 15px 25px;
    text-align: center;
    text-transform: uppercase;
    touch-action: manipulation;
    transform: translateZ(0);
    transition: transform 0.2s ease-out, filter .2s, box-shadow 0.2s, background-color 0.2s;
    user-select: none;
    -webkit-user-select: none;
    vertical-align: middle;
    white-space: nowrap;
    width: 150px;
    height: 150px;
    position: absolute;
    background-image: radial-gradient(93% 87% at 87% 89%, rgba(0, 0, 0, 0.23) 0%, transparent 86.18%), radial-gradient(66% 66% at 26% 20%, rgba(255, 255, 255, 0.55) 0%, rgba(255, 255, 255, 0) 69.79%, rgba(255, 255, 255, 0) 100%);
    box-shadow: inset -3px -3px 9px rgba(255, 255, 255, 0.25), inset 0px 3px 9px rgba(255, 255, 255, 0.3), inset 0px 1px 1px rgba(255, 255, 255, 0.6), inset 0px -8px 36px rgba(0, 0, 0, 0.3), inset 0px 1px 5px rgba(255, 255, 255, 0.6), 2px 19px 31px rgba(0, 0, 0, 0.2);
}


.button:after {
    background-clip: padding-box;
    border: solid transparent;
    border-radius: 50%;
    border-width: 0 0 4px;
    bottom: -4px;
    content: "";
    left: 0;
    position: absolute;
    right: 0;
    top: 0;
    z-index: -1;
}

.button,
.button:focus {
    user-select: auto;
}

.button:disabled {
    cursor: auto;
}

.button:active {
    border-width: 4px 0 0;
    background-color: #6cb8f7; 
}

.button:hover {
    transform: scale(1.5); 
    background-image: radial-gradient(93% 87% at 87% 89%, rgba(0, 0, 0, 0.23) 0%, transparent 86.18%), radial-gradient(66% 66% at 26% 20%, rgba(255, 255, 255, 0.55) 0%, rgba(255, 255, 255, 0) 69.79%, rgba(255, 255, 255, 0) 100%), radial-gradient(circle, #498cff 0%, rgba(30, 144, 255, 0) 70%);
}

.button:nth-child(1) {
    width: 260px;
    height: 260px;
    top: 17%; 
    left: -5%;
}

.button:nth-child(2) {
    width: 230px; 
    height: 230px;
    top: 23%; 
    left: 65%;
}

.button:nth-child(3) {
    width: 200px;
    height: 200px;
    bottom: 15%; 
    left: 10%;
}

.button:nth-child(4) {
    width: 160px;
    height: 160px;
    position: absolute;
    bottom: 25%;
    right: 3%;
    border-radius: 50%;
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    transform-origin: left center;
 }
   
 .button:nth-child(4):hover {
    transform: translateX(250px); 
    width: 400px;
    border-radius: 80px;
    opacity: 0.9;
 }

.button:nth-child(4) .icons {
    display: none; 
    justify-content: center;
    align-items: center;
    width: 100%;
    height: 100%;
}

.button:nth-child(4) .icons a {
    margin: 0 10px; 
    display: flex;
    justify-content: center;
    align-items: center; 
}

.button:nth-child(4):hover .icons {
    margin-left: 0px;
    display:contents;
    justify-content: left;
    align-items: left;
}

.button:nth-child(4) .icons #linkedin:hover, #github:hover, #mail:hover{
    transition: transform 0.3s; 
    transform: scale(1.2);
}

.button:nth-child(4) .icons #linkedin, #github, #mail{    
    transition: transform 0.3s;
}



.button:nth-child(4) .contact-text {
    transition: opacity 0.2s ease-in-out; 
}

.button:nth-child(4):hover .contact-text {
    display: none;
}

.notification {
    position: absolute;
    background-color: #1e1e1e;
    color: white;
    padding: 5px 10px;
    border-radius: 5px;
    font-size: 0.9rem;
    display: none; 
    z-index: 1000; 
}


.button-group a {
    color: white;
    font-family: "NTR", serif;
    font-weight: 600;
    font-style: normal;
    font-size: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    overflow: hidden;
    width: 200px;
    height: 200px;
    text-decoration: none;
}

.button-group span{
    color: white;
    font-family: "NTR", serif;
    font-weight: 600;
    font-style: normal;
}

.button-group a:visited {
    color: inherit; 
}

.icons a{
    height: 70%;
    width: 50%;
}

#box2 img,
#box3 img, 
#box4 img{
    width: 15%;
}   

.box {
    display: flex;
    flex-direction: column;
    justify-content: top; 
    align-items: center; 
    gap: 20px; 
}


.sub-box{
    color: #dbdada;
    font-size: 20px;
    margin-top: 50px;
    margin-left: 120px;
    width: 800px;
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 50px;
}