*{
    margin:0;
    padding:0;
    box-sizing:border-box;
}

html{
    scroll-behavior:smooth;
}

body{
    background:#f8fafc;
    color:#0f172a;
    font-family:'Inter', sans-serif;
}

/* Navbar */

.navbar{
    background:white;
    backdrop-filter:blur(10px);
    padding:15px 0;
    box-shadow:0px 2px 10px rgba(0,0,0,0.08);
}

.navbar-brand{
    color:#0f172a !important;
    font-size:1.7rem;
    font-weight:700;
}

.nav-link{
    color:#475569 !important;
    margin-left:20px;
    transition:0.3s;
    font-weight:500;
     font-size:15px;
}

.nav-link:hover{
    color:#2563eb !important;
}

.nav-link.active{
    color:#2563eb !important;
}

/* Hero Section */

  /* Hero Section */

.hero-section{
    background:url('../assets/images/cover.jpg');
    background-size:cover;
    background-position:center;
    background-repeat:no-repeat;
    min-height:600px;
    position:relative;
}

.hero-overlay{
    background:linear-gradient(
        rgba(255,255,255,0.25),
        rgba(255,255,255,0.55)
    );
    min-height:600px;
    display:flex;
    align-items:center;
}

.hero-wrapper{
    display:flex;
    align-items:center;
    gap:60px;
    padding-top:100px;
}

.hero-image{
    flex:0 0 220px;
}

.profile-img{
    width:220px;
    height:220px;
    border-radius:50%;
    object-fit:cover;
    border:6px solid white;
    box-shadow:0px 10px 30px rgba(0,0,0,0.20);
}

.hero-content{
    flex:1;
}

.hero-content h1{
    font-size:4rem;
    font-weight:700;
    color:#0f172a;
    margin-bottom:10px;
}

.hero-content h3{
    color:#2563eb;
    margin-bottom:20px;
}

.dept{
    font-size:1.1rem;
    color:#334155;
    margin-bottom:5px;
}

.hero-tagline{
    font-size:1.15rem;
    color:#475569;
    margin-top:20px;
}

.hero-desc{
    max-width:700px;
    line-height:1.8;
    color:#475569;
    margin-top:15px;
}

.hero-buttons{
    margin-top:25px;
}
/* Buttons */

.btn{
    transition:0.3s;
}

.btn:hover{
    transform:translateY(-2px);
}

.btn-primary{
    background:#2563eb;
    border:none;
    padding:12px 28px;
    border-radius:12px;
}

.btn-primary:hover{
    background:#1d4ed8;
}

.btn-outline-light{
    color:#2563eb;
    border:2px solid #2563eb;
    background:white;
    border-radius:12px;
    padding:12px 28px;
}

.btn-outline-light:hover{
    background:#2563eb;
    color:white;
}

/* Main Content */

.main-content{
   margin-top:50px;
    padding-bottom:60px;
    position:relative;
    z-index:5;
}


/* Cards */

.custom-card{
    background:white;
    border:1px solid #e2e8f0;
    border-radius:24px;
    padding:30px;
    box-shadow:0px 8px 25px rgba(0,0,0,0.06);
    height:100%;
    transition:0.3s;
}

.custom-card:hover{
    transform:translateY(-5px);
}

.custom-card h2{
    font-size:2rem;
    margin-bottom:25px;
    color:#0f172a;
}

.custom-card p{
    color:#475569;
    line-height:1.8;
}

/* Education */

.education-list{
    list-style:none;
    padding:0;
}

.education-list li{
    margin-bottom:25px;
    padding-left:20px;
    border-left:3px solid #2563eb;
    color:#475569;
}

/* Research Tags */

.tags{
    display:flex;
    flex-wrap:wrap;
    gap:12px;
    margin-top:20px;
}

.tags span{
    background:#eff6ff;
    color:#2563eb;
    padding:10px 18px;
    border-radius:30px;
    font-weight:500;
}

.tags span:hover{
    background:#2563eb;
    color:white;
}

/* Academic Highlights */

.highlight-box{
    background:#f8fafc;
    border:1px solid #e2e8f0;
    border-radius:20px;
    padding:25px 10px;
    margin-top:10px;
}

.highlight-box h1{
    font-size:3rem;
    color:#2563eb;
}

.highlight-box p{
    color:#475569;
}

/* Publications */

.publication-item{
    background:#f8fafc;
    border:1px solid #e2e8f0;
    border-radius:18px;
    padding:20px;
    margin-bottom:20px;
}

.publication-item h5,
.publication-item h4{
    color:#0f172a;
    margin-bottom:10px;
}

.publication-item p{
    margin:0;
    color:#64748b;
}

/* Leadership */

.leadership-item{
    background:#f8fafc;
    border:1px solid #e2e8f0;
    border-radius:18px;
    padding:20px;
    margin-bottom:20px;
}

.leadership-item h5{
    color:#0f172a;
}

.leadership-item p{
    color:#64748b;
}

/* Gallery */

.gallery-img{
    width:100%;
    height:220px;
    object-fit:cover;
    border-radius:18px;
    transition:0.3s;
}

.gallery-img:hover{
    transform:scale(1.03);
}

.gallery-link{
    color:#2563eb;
    text-decoration:none;
    font-weight:600;
}

/* Publications Page Header */

.page-header{
    padding:140px 0 60px;
    background:linear-gradient(
        to right,
        #eff6ff,
        #f8fafc
    );
}

.page-header h1{
    font-size:3rem;
    font-weight:bold;
    color:#0f172a;
}

.page-header p{
    color:#475569;
    margin-top:15px;
}

/* Gallery Page */

.gallery-page-img{
    width:100%;
    height:320px;
    object-fit:cover;
    border-radius:20px;
    transition:0.3s;
}

.gallery-page-img:hover{
    transform:scale(1.03);
    box-shadow:0px 10px 25px rgba(0,0,0,0.15);
}
/*footer */
.footer-section{
    background:#ffffff;
    border-top:1px solid #e2e8f0;
    text-align:center;
    padding:40px 20px;
    margin-top:60px;
}

.footer-section h5{
    color:#0f172a;
    font-weight:700;
    margin-bottom:10px;
}

.footer-section p{
    color:#64748b;
    margin-bottom:10px;
    line-height:1.7;
}

.footer-email{
    font-weight:500;
}

.footer-section hr{
    max-width:400px;
    margin:20px auto;
    border-color:#e2e8f0;
}

.copyright{
    font-size:14px;
    color:#94a3b8;
}

/* Scrollbar */

::-webkit-scrollbar{
    width:10px;
}

::-webkit-scrollbar-track{
    background:#f1f5f9;
}

::-webkit-scrollbar-thumb{
    background:#2563eb;
    border-radius:10px;
}

/* Responsive */

@media(max-width:992px){

    .hero-section{
        text-align:center;
    }

    .hero-wrapper{
        flex-direction:column;
        gap:20px;
        padding-top:60px;
    }

    .hero-image{
        flex:0 0 auto;
    }

    .hero-content h1{
        font-size:2.8rem;
        margin-top:30px;
    }

    .profile-img{
        width:180px;
        height:180px;
    }

    .hero-buttons .btn{
        margin-bottom:15px;
    }
}

@media(max-width:768px){

    .hero-section{
        min-height:auto;
    }

    .hero-overlay{
        padding:120px 20px 60px;
    }

    .hero-content h1{
        font-size:2.3rem;
    }

    .hero-content h3{
        font-size:1.3rem;
    }

    .custom-card{
        padding:25px;
    }

    .custom-card h2{
        font-size:1.6rem;
    }

    .gallery-img,
    .gallery-page-img{
        height:220px;
    }

    .navbar-brand{
        font-size:1.1rem;
    }
}



/* Contact Section */

#contact a{
    text-decoration:none;
}

#contact .btn-primary{
    background:#2563eb;
    border:none;
    color:white !important;
    font-weight:600;
    padding:12px 28px;
    border-radius:12px;
}

#contact .btn-primary:hover{
    background:#1d4ed8;
    color:white !important;
}

#contact .btn-outline-primary{
    border:2px solid #2563eb;
    color:#2563eb !important;
    background:white;
    font-weight:600;
    padding:12px 28px;
    border-radius:12px;
}

#contact .btn-outline-primary:hover{
    background:#2563eb;
    color:white !important;
}

#contact p{
    margin-bottom:15px;
    color:#475569;
    line-height:1.8;
}

#contact strong{
    color:#0f172a;
}

#contact .btn{
    margin-top:10px;
    display:inline-block;
}