/* Global Styles */
:root {
    --primary: #2c3e50;
    --secondary: #3498db;
    --light: #ecf0f1;
    --dark: #2c3e50;
    --accent: #e74c3c;
}

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

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    line-height: 1.6;
    color: #333;
}

.container {
    width: 85%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

.section {
    padding: 80px 0;
}

.section-title {
    text-align: center;
    margin-bottom: 50px;
    font-size: 2.5rem;
    color: var(--primary);
    position: relative;
}

.section-title::after {
    content: '';
    display: block;
    width: 80px;
    height: 4px;
    background: var(--secondary);
    margin: 15px auto;
}

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

.btn {
    display: inline-block;
    background: var(--secondary);
    color: white;
    padding: 12px 25px;
    border: none;
    border-radius: 5px;
    text-decoration: none;
    font-weight: 600;
    transition: all 0.3s ease;
    margin-top: 20px;
}

.btn:hover {
    background: #2980b9;
    transform: translateY(-3px);
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
}

.btn-outline {
    display: inline-block;
    border: 2px solid var(--secondary);
    color: var(--secondary);
    padding: 10px 20px;
    border-radius: 5px;
    text-decoration: none;
    font-weight: 600;
    transition: all 0.3s ease;
    margin-top: 20px;
}

.btn-outline:hover {
    background: var(--secondary);
    color: white;
}

/* Navigation */
#navbar {
    background: var(--primary);
    color: white;
    padding: 20px 0;
    position: sticky;
    top: 0;
    z-index: 100;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
}

#navbar .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-size: 1.8rem;
    font-weight: 700;
}

#navbar ul {
    display: flex;
    list-style: none;
}

#navbar ul li {
    margin-left: 30px;
}

#navbar ul li a {
    color: white;
    text-decoration: none;
    font-weight: 600;
    transition: all 0.3s ease;
}

#navbar ul li a:hover {
    color: var(--secondary);
}

/* Hero Section */
.hero {
    background: linear-gradient(rgba(44, 62, 80, 0.9), rgba(44, 62, 80, 0.9)), 
                url('https://img.freepik.com/free-vector/hand-drawn-scientific-formulas-chalkboard_23-2148496321.jpg?t=st=1744759898~exp=1744763498~hmac=bfb8b9bace028a081c73da91cf505721a40bd3081ce1d807483302311e5ad30c&w=996');
    background-size: cover;
    background-position: center;
    color: white;
    text-align: center;
    padding: 120px 0;
}

.hero-content {
    max-width: 800px;
    margin: 0 auto;
}

.profile-img {
    width: 150px;
    height: 150px;
    border-radius: 50%;
    object-fit: cover;
    border: 5px solid white;
    margin-bottom: 20px;
}

.hero h1 {
    font-size: 3rem;
    margin-bottom: 10px;
}

.hero .title {
    font-size: 1.5rem;
    margin-bottom: 30px;
    opacity: 0.9;
}

.social-links {
    margin-bottom: 30px;
}

.social-links a {
    color: white;
    font-size: 1.5rem;
    margin: 0 10px;
    transition: all 0.3s ease;
}

.social-links a:hover {
    color: var(--secondary);
    transform: translateY(-3px);
}

/* About Section */
.about-grid {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 50px;
    align-items: start;
}

.about-text h3 {
    margin: 20px 0 15px;
    color: var(--primary);
}

.about-text ul {
    margin-left: 20px;
}

.about-text li {
    margin-bottom: 10px;
}

.awards .award-item {
    margin-bottom: 25px;
    padding-left: 20px;
    border-left: 3px solid var(--secondary);
}

.award-item .year {
    display: inline-block;
    background: var(--secondary);
    color: white;
    padding: 3px 10px;
    border-radius: 3px;
    font-size: 0.9rem;
    margin-bottom: 5px;
}

/* Research Section */
.tabs {
    display: flex;
    margin-bottom: 30px;
    border-bottom: 1px solid #ddd;
}

.tab-btn {
    padding: 10px 20px;
    background: none;
    border: none;
    border-bottom: 3px solid transparent;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
}

.tab-btn.active {
    border-bottom: 3px solid var(--secondary);
    color: var(--secondary);
}

.tab-content {
    display: none;
}

.tab-content.active {
    display: block;
}

.publication-list {
    list-style: none;
}

.publication-list li {
    margin-bottom: 20px;
    padding-bottom: 20px;
    border-bottom: 1px solid #eee;
}

.pub-title {
    display: block;
    font-weight: 600;
    margin-bottom: 5px;
}

.pub-journal {
    display: block;
    font-style: italic;
    color: #666;
    margin-bottom: 10px;
}

.pub-link {
    color: var(--secondary);
    text-decoration: none;
    font-weight: 600;
}

.patent-grid, .project-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 20px;
}

.patent-item, .project-item {
    background: white;
    padding: 20px;
    border-radius: 5px;
    box-shadow: 0 3px 10px rgba(0, 0, 0, 0.1);
}

.patent-item h4, .project-item h4 {
    margin-bottom: 10px;
    color: var(--primary);
}

.patent-no, .amount {
    display: inline-block;
    background: var(--light);
    padding: 3px 10px;
    border-radius: 3px;
    font-size: 0.9rem;
    margin-top: 10px;
}

/* Books Section */
.books-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
    gap: 30px;
    margin-bottom: 40px;
}

.book-card {
    background: white;
    border-radius: 5px;
    overflow: hidden;
    box-shadow: 0 3px 15px rgba(0, 0, 0, 0.1);
    transition: all 0.3s ease;
}

.book-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.15);
}

.book-cover {
    height: 200px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    padding: 20px;
    text-align: center;
}

.book-cover h3 {
    font-size: 1.3rem;
}

.book-info {
    padding: 20px;
    text-align: center;
}

.book-info p {
    margin-bottom: 15px;
    color: #666;
}

/* Contact Section */
.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 50px;
}

.contact-info h3 {
    margin-bottom: 20px;
    color: var(--primary);
}

.contact-info p {
    margin-bottom: 15px;
    display: flex;
    align-items: center;
}

.contact-info i {
    margin-right: 10px;
    color: var(--secondary);
    width: 20px;
}

.contact-links a {
    display: block;
    margin: 15px 0;
    color: var(--secondary);
    text-decoration: none;
    font-weight: 600;
}

.contact-links i {
    margin-right: 8px;
}

.form-group {
    margin-bottom: 20px;
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 12px;
    border: 1px solid #ddd;
    border-radius: 5px;
    font-family: inherit;
}

.form-group textarea {
    resize: vertical;
}

/* Footer */
footer {
    background: var(--dark);
    color: white;
    padding: 30px 0;
    text-align: center;
}

.footer-links {
    margin-top: 20px;
    color: #ddd;
}

.footer-links a {
    color: white;
    margin: 0 15px;
    text-decoration: none;
}

/* Responsive */
@media (max-width: 768px) {
    .about-grid, .contact-grid {
        grid-template-columns: 1fr;
    }
    
    #navbar .container {
        flex-direction: column;
    }
    
    #navbar ul {
        margin-top: 20px;
    }
    
    .hero h1 {
        font-size: 2.2rem;
    }
    
    .hero .title {
        font-size: 1.2rem;
    }
}

@media (max-width: 480px) {
    .section {
        padding: 50px 0;
    }
    
    .section-title {
        font-size: 2rem;
    }
    
    .tabs {
        flex-direction: column;
    }
    
    .tab-btn {
        border-bottom: none;
        border-left: 3px solid transparent;
        text-align: left;
    }
    
    .tab-btn.active {
        border-left: 3px solid var(--secondary);
        border-bottom: none;
    }
}
a.niche{
    color: white;
    text-decoration: none;
}
html{
    scroll-behavior: smooth;
}