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

:root {
    --bg-color: #fff;
    --snd-bg-color: #d5fdf9;
    --text-color: #000;
    --main-color: #007f73;
} 

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

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

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

/* header section code */

.header {
    position: fixed;
    width: 100%;
    top: 0;
    right: 0;
    z-index: 1000;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 2rem 5%;
    background: var(--main-color);
    backdrop-filter: blur(10px);
    transition: all 0.5s ease;
}

.logo {
    font-size: 3rem;
    color: var(--bg-color);
    font-weight: 700;
    cursor: pointer;
    transition: 0.3s ease;
}

.logo:hover {
    transform: scale(1.05);
}

.navbar a {
    font-size: 1.9rem;
    color: var(--bg-color);
    margin-left: 4rem;
    font-weight: 700;
    transition: 0.3s ease;
}

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

#menu-icon {
    font-size: 3rem;
    color: var(--main-color);
}

/* Home section codes */

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

.home-img img{
    width: 25vw;
    border-radius: 50%;
    box-shadow: 0 0 25px var(--main-color);
    cursor: pointer;
    animation: floatImage 4s ease-in-out infinite;
    transition: 0.4s ease;
}

.home-img img:hover {
   box-shadow: 0 0 25px var(--main-color),
               0 0 35px var(--main-color),
               0 0 45px var(--main-color);  
}

@keyframes floatImage {
    0% {
        transform: translateY(0);
    }
    50% {
        transform: translateY(-2.4rem);
    }
    100% {
        transform: translateY(0);
    }   
}

.home-content {
    margin-left: 5rem;
}

.home-content h3 {
    font-size: 3.7rem;
    font-weight: 700;
}

.home-content h3:nth-of-type(2) {
    margin-bottom: 2rem;
}

span {
    color: var(--main-color);
}

.home-content h1 {
    font-size: 6rem;
    font-weight: 700;
    line-height: 1.3;
}

.home-content p {
    font-size: 1.6rem;
}

.social-media a {
    display: inline-flex;
    justify-content: center;
    align-items: center;
    width: 42px;
    height: 42px;
    background: transparent;
    border: 0.2rem solid var(--main-color); 
    border-radius: 50%;
    font-size: 2rem;
    color: var(--main-color);
    margin: 3rem 1.5rem 3rem 0;
    transition: 0.3s ease;
}

.social-media a:hover {
    transform: scale(1.2) translateY(-10px);
    background-color: var(--main-color);
    color: var(--bg-color);
    box-shadow: 0 0 25px var(--main-color);
}

.btn {
    display: inline-block;
    padding: 1rem 2.8rem;
    background: var(--main-color);
    border-radius: 4rem;
    box-shadow: none;
    font-size: 1.6rem;
    color: var(--bg-color);
    letter-spacing: 0.1rem;
    font-weight: 600;
    transition: 0.3s ease;
}

.btn:hover {
    box-shadow: 0 0 1.6rem var(--main-color);
}

.about {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 2rem;
    background: var(--snd-bg-color);
}

.about-img img {
    width: 25vw;
    border: 2px solid var(--main-color);
    border-radius: 50%;
    box-shadow: 0 0 25px var(--main-color);
    cursor: pointer;
    transition: 0.3s ease;
}

.about-img img:hover {
    box-shadow: 0 0 25px var(--main-color),
               0 0 35px var(--main-color),
               0 0 45px var(--main-color); 
}

.heading {
    font-size: 6rem;
    text-align: left;
    line-height: 1.2;
}

.about-content h2 {
    font-size: 6rem;
    text-align: left;
    line-height: 1.2;
}

.about-content {
    padding: 0 4rem;
}

.about-content h3 {
    font-size: 3rem;
}

.about-content p {
    font-size: 1.6rem;
    margin: 2rem 0 3rem;
}

/*Works code section*/

.works h2 {
    text-align: center;
    margin-bottom: 5rem;
}

.works-container {
    display: flex;
    justify-content: center;
    align-items: center;
    flex-wrap: wrap;
    gap: 2rem;
}

.works-container .work-box {
    flex: 1 1 30rem;
    background: var(--snd-bg-color);
    padding: 6rem 2rem 6rem;
    border-radius: 2rem;
    text-align: center;
    border: 0.3rem solid var(--bg-color);
    transition: 0.3s ease;
}

.works-container .work-box:hover {
    border-color: var(--main-color);
    transform: scale(1.02);
}

.work-box i {
    font-size: 7rem;
    color: var(--main-color);
}

.work-box h3 {
    font-size: 2.6rem;
}

.work-box p {
    font-size: 1.6rem;
    margin: 1rem 0rem 3rem;
}

/* Publications section code */

.publications {
    background: var(--snd-bg-color);
}

.publications h2 {
    text-align: center;
    margin-bottom: 5rem;
}


.publications-container {
    display: flex;
    justify-content: center;
    align-items: center;
    flex-wrap: wrap;
    gap: 2rem;
}

.publications-container .publications-box {
    flex: 1 1 30rem;
    background: var(--bg-color);
    padding: 6rem 2rem 6rem;
    border-radius: 2rem;
    text-align: center;
    border: 0.3rem solid var(--bg-color);
    transition: 0.3s ease;
}

.publications-container .publications-box:hover {
    border-color: var(--main-color);
    transform: scale(1.02);
}

.publications-box h3 {
    font-size: 2rem;
}

.publications-box p {
    font-size: 1.6rem;
    margin: 1rem 0rem 3rem;
}

.to-pub {
    text-align: center;
    margin-top: 2rem;
    margin-bottom: 3rem;
}

 /* Additional styles specific to publications page */
 
        .publications-header {
            text-align: center;
            margin-bottom: 5rem;
        }

        .publications-header h1 {
            font-size: 6rem;
            color: var(--text-color);
            line-height: 1.2;
        }

        .publications-header h1 span {
            color: var(--main-color);
        }

        .publications-header p {
            font-size: 1.8rem;
            color: var(--text-color);
            opacity: 0.8;
            max-width: 800px;
            margin: 2rem auto 0;
        }

        .filters {
            background: var(--bg-color);
            padding: 2.5rem;
            border-radius: 2rem;
            box-shadow: 0 0 20px rgba(0, 127, 115, 0.1);
            margin-bottom: 4rem;
            display: flex;
            gap: 1.5rem;
            flex-wrap: wrap;
            align-items: center;
            border: 0.2rem solid transparent;
            transition: 0.3s ease;
        }

        .filters:hover {
            border-color: var(--main-color);
        }

        .filter-btn {
            padding: 1rem 2.5rem;
            border-radius: 4rem;
            background: var(--snd-bg-color);
            color: var(--text-color);
            font-size: 1.6rem;
            font-weight: 600;
            cursor: pointer;
            transition: 0.3s ease;
            border: 0.2rem solid transparent;
        }

        .filter-btn:hover {
            border-color: var(--main-color);
            transform: scale(1.05);
        }

        .filter-btn.active {
            background: var(--main-color);
            color: var(--bg-color);
        }

        .search-box {
            flex: 1;
            min-width: 28rem;
            padding: 1.2rem 2rem;
            border-radius: 4rem;
            background: var(--snd-bg-color);
            font-size: 1.6rem;
            color: var(--text-color);
            border: 0.2rem solid transparent;
            transition: 0.3s ease;
        }

        .search-box:focus {
            border-color: var(--main-color);
        }

        .stats {
            background: var(--bg-color);
            padding: 2rem;
            border-radius: 2rem;
            box-shadow: 0 0 20px rgba(0, 127, 115, 0.1);
            margin-bottom: 3rem;
            display: flex;
            gap: 3rem;
            justify-content: flex-end;
            border: 0.2rem solid transparent;
            transition: 0.3s ease;
        }

        .stats:hover {
            border-color: var(--main-color);
        }

        .stat-item {
            font-size: 1.8rem;
            color: var(--text-color);
        }

        .stat-number {
            font-weight: 700;
            color: var(--main-color);
            margin-left: 0.8rem;
            font-size: 2.2rem;
        }

        .publications-section {
            background: var(--bg-color);
            border-radius: 2rem;
            padding: 3rem;
            margin-bottom: 4rem;
            box-shadow: 0 0 20px rgba(0, 127, 115, 0.1);
            border: 0.2rem solid transparent;
            transition: 0.3s ease;
        }

        .publications-section:hover {
            border-color: var(--main-color);
        }

        .section-title {
            font-size: 3rem;
            color: var(--main-color);
            border-bottom: 0.3rem solid var(--main-color);
            padding-bottom: 1.5rem;
            margin-bottom: 3rem;
            display: inline-block;
        }

        .publication-item {
            padding: 2.5rem;
            border-bottom: 0.1rem solid rgba(0, 127, 115, 0.2);
            transition: 0.3s ease;
            border-radius: 1rem;
        }

        .publication-item:last-child {
            border-bottom: none;
        }

        .publication-item:hover {
            background: var(--snd-bg-color);
            transform: translateX(1rem);
        }

        .publication-authors {
            font-size: 1.8rem;
            color: var(--main-color);
            font-weight: 600;
            margin-bottom: 1rem;
        }

        .publication-title {
            font-size: 2.2rem;
            color: var(--text-color);
            margin-bottom: 1.2rem;
            font-weight: 700;
            line-height: 1.4;
        }

        .publication-journal {
            font-size: 1.6rem;
            color: var(--text-color);
            opacity: 0.8;
            font-style: italic;
            margin-bottom: 1.5rem;
        }

        .publication-links {
            margin-top: 1.5rem;
            display: flex;
            gap: 1.5rem;
            flex-wrap: wrap;
            align-items: center;
        }

        .publication-link {
            display: inline-flex;
            align-items: center;
            gap: 0.8rem;
            padding: 0.8rem 2rem;
            background: var(--main-color);
            color: var(--bg-color);
            text-decoration: none;
            border-radius: 4rem;
            font-size: 1.5rem;
            font-weight: 600;
            transition: 0.3s ease;
            border: 0.2rem solid transparent;
        }

        .publication-link:hover {
            transform: scale(1.05);
            box-shadow: 0 0 25px var(--main-color);
        }

        .publication-doi {
            font-size: 1.4rem;
            color: var(--text-color);
            opacity: 0.7;
            background: var(--snd-bg-color);
            padding: 0.5rem 1.5rem;
            border-radius: 4rem;
        }

        .no-publications {
            text-align: center;
            padding: 5rem;
            font-size: 2rem;
            color: var(--text-color);
            background: var(--snd-bg-color);
            border-radius: 2rem;
        }

        .manage-info {
            background: linear-gradient(135deg, var(--main-color), #004d45);
            color: var(--bg-color);
            padding: 2.5rem;
            border-radius: 2rem;
            margin-top: 4rem;
            font-size: 1.6rem;
        }

        .manage-info h3 {
            font-size: 2.2rem;
            margin-bottom: 1.5rem;
            display: flex;
            align-items: center;
            gap: 1rem;
        }

        .manage-info pre {
            background: rgba(255, 255, 255, 0.1);
            padding: 1.5rem;
            border-radius: 1rem;
            margin: 1.5rem 0;
            overflow-x: auto;
            font-family: monospace;
            font-size: 1.4rem;
        }

        .manage-info code {
            font-family: monospace;
            background: rgba(0, 0, 0, 0.2);
            padding: 0.2rem 0.5rem;
            border-radius: 0.5rem;
        }

        .back-btn {
            display: inline-flex;
            align-items: center;
            gap: 0.8rem;
            margin-bottom: 3rem;
            font-size: 1.8rem;
            color: var(--main-color);
            transition: 0.3s ease;
        }

        .back-btn:hover {
            transform: translateX(-1rem);
        }

        @media (max-width: 768px) {
            .publications-header h1 {
                font-size: 4rem;
            }
            
            .filters {
                flex-direction: column;
            }
            
            .filter-btn {
                width: 100%;
                text-align: center;
            }
            
            .stats {
                flex-direction: column;
                gap: 1rem;
            }
            
            .publication-item:hover {
                transform: translateX(0);
            }
        }

/* contact Section code*/

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

.contact .heading {
    text-align: center;
}

.contact h2 {
    margin-bottom: 3rem;
    color: var(--main-color);
}

.contact form {
    max-width: 80rem;
    margin: 1rem auto;
    text-align: center;
    margin-bottom: 3rem;
}

.contact form .input-box {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
}

.contact form .input-box input,
.contact form textarea {
    width: 100%;
    padding: 1.5rem;
    font-size: 1.6rem;
    color: var(--text-color);
    background: var(--bg-color);
    border-radius: 0.8rem;
    border: 0.25rem solid var(--main-color);
    margin: 0.7rem 0;
    resize: none;
}

.contact form .input-box input {
    width: 49%;
    margin: 0.7rem 0.35rem;
}

.contact form .btn {
    margin-top: 2rem;
}

.toast{
    position: fixed;
    top: 20px;
    right: -350px;
    background: var(--main-color);
    color: var(--bg-color);
    padding: 16px 22px;
    border-radius: 8px;
    font-size: 16px;
    box-shadow: 0 8px 25px rgba(0,0,0,0.2);
    transition: 0.4s ease;
    z-index: 9999;
}

.toast.show{
    right: 20px;
}

/* Footer Section code */

.footer {
    position: relative;
    bottom: 0;
    width: 100%;
    padding: 40px 0;
    background-color: var(--snd-bg-color);
}

.footer .social {
    text-align: center;
    padding-bottom: 25px;
    color: var(--main-color);
}

.footer .social a {
    display: inline-flex;
    justify-content: center;
    align-items: center;
    width: 42px;
    height: 42px;
    background: transparent;
    border: 0.2rem solid var(--main-color); 
    border-radius: 50%;
    font-size: 2rem;
    color: var(--main-color);
    margin: 3rem 1.5rem 3rem 0;
    transition: 0.3s ease
}

.footer .social a:hover {
    transform: scale(1.2) translateY(-10px);
    background-color: var(--main-color);
    color: var(--bg-color);
    box-shadow: 0 0 25px var(--main-color);
}

.copyright {
    align-items: center;
    color: var(--text-color);
    text-align: center;
    font-size: 1.6rem;
}

/* Responsive codes */

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

@media (max-width: 991px) {
    .header {
        padding: 2rem 3%;
    }
    .section {
        padding: 10rem 3%;
    }
    .works {
        padding: 7rem;
    }
    .contact form .input-box input{
        width: 100%;
    }
    .footer {
        padding: 2rem 3%;
    }
}

@media (max-width: 991px) {
    #menu-icon {
        display: block;
        color: var(--bg-color);
    }
    .navbar {
        position: absolute;
        top: 100%;
        right: -100%;
        width: 255px;
        min-height: 100vh;
        display: flex;
        flex-direction: column;
        background: var(--main-color);
        transition: all 0.5s ease;
        backdrop-filter: blur(10px);
    }
    .navbar a {
        display: block;
        padding: 17px;
        
    }
    .navbar.active {
        right: 0%;
    }
    .home {
        flex-direction: column;
    }
    .home-content h3 {
        font-size: 2.6rem;
    }
    .home-content h1 {
        font-size: 5rem;
    }
    .home-content {
        order: 2;
        margin-left: 1rem;
    }
    .home-img img {
        width: 70vw;
        margin-top: 4rem;
    }
    .about {
        flex-direction: column-reverse;
    }
    .about-img img {
        width: 70vw;
        margin-top: 4rem;
    }
    .works h2 {
        margin-bottom: 3rem;
    }
}

@media (max-width: 617px) {
    .home-img img {
        width: 70vw;
        margin-top: 8rem;
    }
    .about-img img {
        width: 70vw;
        margin-top: 4rem;
    }
}

@media(max-width: 617px) {
    html {
        font-size: 50%;
    }
}