:root {
    --bg-color: #0a0a0a;
    --bg-secondary: #111111;
    --text-primary: #ffffff;
    --text-secondary: #a0a0a0;
    --accent-primary: #3b82f6;
    /* Blue */
    --accent-secondary: #8b5cf6;
    /* Purple */
    --gradient-main: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
    --font-heading: 'Outfit', sans-serif;
    --font-body: 'Inter', sans-serif;
    --transition: all 0.3s ease;
}

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

body {
    font-family: var(--font-body);
    background-color: var(--bg-color);
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
}

a {
    text-decoration: none;
    color: inherit;
}

ul {
    list-style: none;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
}

/* Navbar */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    padding: 1.5rem 0;
    background: rgba(10, 10, 10, 0.8);
    backdrop-filter: blur(10px);
    z-index: 1000;
    transition: var(--transition);
}

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

.logo {
    font-family: var(--font-heading);
    font-size: 1.5rem;
    font-weight: 700;
    background: var(--gradient-main);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}

.nav-links {
    display: flex;
    gap: 2rem;
}

.nav-links a {
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--text-secondary);
    transition: var(--transition);
}

.nav-links a:hover {
    color: var(--text-primary);
}

.hamburger {
    display: none;
    cursor: pointer;
}

/* Hero Section */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    position: relative;
    overflow: hidden;
    padding-top: 80px;
    /* Account for fixed navbar */
}

.hero-container {
    display: grid;
    grid-template-columns: 1.2fr 0.8fr;
    gap: 4rem;
    align-items: center;
    position: relative;
    z-index: 2;
}

.hero-content {
    max-width: 100%;
}

.hero-image {
    position: relative;
}

.hero-image img {
    width: 100%;
    max-width: 400px;
    border-radius: 20px;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.3);
    border: 1px solid rgba(255, 255, 255, 0.1);
    transform: rotate(2deg);
    transition: var(--transition);
}

.hero-image:hover img {
    transform: rotate(0deg) scale(1.02);
    border-color: var(--accent-primary);
}

.hero h1 {
    font-family: var(--font-heading);
    font-size: 4rem;
    line-height: 1.1;
    margin-bottom: 1rem;
    background: linear-gradient(to right, #fff, #ccc);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}

.hero h2 {
    font-size: 1.5rem;
    font-weight: 400;
    color: var(--accent-primary);
    margin-bottom: 1.5rem;
}

.hero-tagline {
    font-size: 1.2rem;
    color: var(--text-secondary);
    margin-bottom: 2.5rem;
    max-width: 600px;
}

.hero-buttons {
    display: flex;
    gap: 1rem;
}

.btn {
    padding: 0.8rem 2rem;
    border-radius: 50px;
    font-weight: 600;
    transition: var(--transition);
    display: inline-block;
}

.btn-primary {
    background: var(--gradient-main);
    color: white;
    border: 1px solid transparent;
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 20px rgba(59, 130, 246, 0.3);
}

.btn-secondary {
    background: transparent;
    border: 1px solid var(--text-secondary);
    color: var(--text-primary);
}

.btn-secondary:hover {
    border-color: var(--text-primary);
    background: rgba(255, 255, 255, 0.05);
}

.hero-background {
    position: absolute;
    top: -50%;
    right: -20%;
    width: 800px;
    height: 800px;
    background: radial-gradient(circle, rgba(59, 130, 246, 0.15) 0%, rgba(10, 10, 10, 0) 70%);
    z-index: 1;
    pointer-events: none;
}

/* Sections */
.section {
    padding: 6rem 0;
}

.section-title {
    font-family: var(--font-heading);
    font-size: 2.5rem;
    margin-bottom: 3rem;
    position: relative;
    display: inline-block;
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: -10px;
    left: 0;
    width: 60px;
    height: 4px;
    background: var(--gradient-main);
    border-radius: 2px;
}

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

/* About Grid */
.about-grid {
    display: grid;
    grid-template-columns: 1.5fr 1fr;
    gap: 4rem;
    align-items: center;
}

.about-text p {
    margin-bottom: 1.5rem;
    color: var(--text-secondary);
    font-size: 1.1rem;
}

.stat-card {
    background: rgba(255, 255, 255, 0.03);
    padding: 2rem;
    border-radius: 16px;
    margin-bottom: 1rem;
    border: 1px solid rgba(255, 255, 255, 0.05);
    transition: var(--transition);
}

.stat-card:hover {
    background: rgba(255, 255, 255, 0.05);
    transform: translateY(-5px);
}

.stat-card h3 {
    font-size: 2rem;
    font-family: var(--font-heading);
    color: var(--accent-primary);
    margin-bottom: 0.5rem;
}

.stat-card p {
    font-size: 0.9rem;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 1px;
}

/* Expertise Grid */
.expertise-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
}

.expertise-card {
    background: var(--bg-color);
    padding: 2.5rem;
    border-radius: 16px;
    border: 1px solid rgba(255, 255, 255, 0.05);
    transition: var(--transition);
}

.expertise-card:hover {
    border-color: var(--accent-primary);
    transform: translateY(-5px);
}

.expertise-card .icon {
    font-size: 2.5rem;
    margin-bottom: 1.5rem;
}

/* Publications */
.publications-list {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.publication-item {
    display: flex;
    gap: 2rem;
    padding: 2rem;
    background: var(--bg-secondary);
    border-radius: 12px;
    border: 1px solid rgba(255, 255, 255, 0.05);
    transition: var(--transition);
}

.publication-item:hover {
    border-color: var(--accent-secondary);
}

.publication-item .year {
    font-family: var(--font-heading);
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-secondary);
    opacity: 0.5;
}

.publication-item h3 {
    font-size: 1.2rem;
    margin-bottom: 0.5rem;
}

.publication-item p {
    color: var(--text-secondary);
}

/* Awards Section */
.awards-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
    background: rgba(255, 255, 255, 0.02);
    padding: 3rem;
    border-radius: 20px;
    border: 1px solid rgba(255, 255, 255, 0.05);
}

.award-content h3 {
    font-family: var(--font-heading);
    font-size: 1.8rem;
    margin-bottom: 1rem;
    color: var(--accent-secondary);
}

.award-content p {
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
}

.link-text {
    color: var(--accent-primary);
    font-weight: 600;
    transition: var(--transition);
}

.link-text:hover {
    color: var(--text-primary);
}

.award-image img {
    width: 100%;
    border-radius: 12px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
}

/* Contact */
.contact-container {
    text-align: center;
    max-width: 800px;
}

.contact-links {
    display: flex;
    justify-content: center;
    gap: 1rem;
    flex-wrap: wrap;
}

.bg-gradient {
    background: radial-gradient(circle at center, rgba(59, 130, 246, 0.1) 0%, var(--bg-color) 70%);
}

/* Footer */
footer {
    padding: 2rem 0;
    border-top: 1px solid rgba(255, 255, 255, 0.05);
    text-align: center;
    color: var(--text-secondary);
    font-size: 0.9rem;
}

/* Animations */
.animate-fade-up {
    opacity: 0;
    transform: translateY(20px);
    animation: fadeUp 0.8s ease forwards;
}

.delay-1 {
    animation-delay: 0.1s;
}

.delay-2 {
    animation-delay: 0.2s;
}

.delay-3 {
    animation-delay: 0.3s;
}

@keyframes fadeUp {
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Responsive */
@media (max-width: 968px) {
    .hero-container {
        grid-template-columns: 1fr;
        text-align: center;
        gap: 3rem;
    }

    .hero-image {
        order: -1;
        display: flex;
        justify-content: center;
    }

    .hero-image img {
        max-width: 250px;
    }

    .hero-buttons {
        justify-content: center;
    }

    .awards-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 768px) {
    .hero h1 {
        font-size: 2.5rem;
    }

    .about-grid {
        grid-template-columns: 1fr;
    }

    .nav-links {
        display: none;
    }

    .hamburger {
        display: block;
    }

    .publication-item {
        flex-direction: column;
        gap: 0.5rem;
    }

    .contact-links {
        flex-direction: column;
        align-items: center;
    }

    .contact-links .btn {
        width: 100%;
        max-width: 300px;
    }
}