/* Root variables for color palette */
:root {
    --bg-color: #0f172a;
    --text-main: #f8fafc;
    --text-muted: #cbd5e1;
    --primary-color: #6366f1;
    --primary-glow: rgba(99, 102, 241, 0.5);
    --secondary-color: #ec4899;
    --accent-color: #14b8a6;
    
    --glass-bg: rgba(30, 41, 59, 0.4);
    --glass-border: rgba(255, 255, 255, 0.1);
    --glass-shadow: 0 8px 32px 0 rgba(0, 0, 0, 0.37);
}

/* Reset and Base Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Prompt', 'Inter', sans-serif;
    background-color: var(--bg-color);
    color: var(--text-main);
    line-height: 1.6;
    overflow-x: hidden;
    position: relative;
}

h1, h2, h3, h4, h5, h6 {
    font-family: 'Inter', 'Prompt', sans-serif;
    font-weight: 600;
}

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

/* Background Animation */
.background-animation {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    z-index: -1;
    overflow: hidden;
}

.blob {
    position: absolute;
    filter: blur(80px);
    border-radius: 50%;
    opacity: 0.6;
    animation: float 20s infinite ease-in-out alternate;
}

.blob-1 {
    top: -10%;
    left: -10%;
    width: 500px;
    height: 500px;
    background: linear-gradient(to right, #4338ca, #6366f1);
    animation-delay: 0s;
}

.blob-2 {
    bottom: -20%;
    right: -10%;
    width: 600px;
    height: 600px;
    background: linear-gradient(to right, #be185d, #ec4899);
    animation-delay: -5s;
}

.blob-3 {
    top: 40%;
    left: 50%;
    width: 400px;
    height: 400px;
    background: linear-gradient(to right, #0f766e, #14b8a6);
    transform: translate(-50%, -50%);
    animation-delay: -10s;
}

@keyframes float {
    0% { transform: translate(0, 0) scale(1); }
    50% { transform: translate(100px, 50px) scale(1.2); }
    100% { transform: translate(-50px, 100px) scale(0.8); }
}

/* Glassmorphism Utilities */
.glass-card {
    background: var(--glass-bg);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid var(--glass-border);
    border-radius: 24px;
    box-shadow: var(--glass-shadow);
}

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

.section-padding {
    padding: 6rem 0;
}

.btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.8rem 1.8rem;
    border-radius: 50px;
    font-weight: 600;
    transition: all 0.3s ease;
    cursor: pointer;
    font-size: 1rem;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: white;
    box-shadow: 0 4px 15px var(--primary-glow);
}

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 25px var(--primary-glow);
}

/* Navigation */
.navbar {
    position: fixed;
    top: 0;
    width: 100%;
    z-index: 1000;
    padding: 1.5rem 0;
    transition: all 0.3s ease;
}

.navbar.scrolled {
    padding: 1rem 0;
    background: rgba(15, 23, 42, 0.8);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--glass-border);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-size: 2rem;
    font-weight: 800;
    background: linear-gradient(to right, #fff, var(--text-muted));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.nav-links {
    display: flex;
    list-style: none;
    gap: 2rem;
}

.nav-links a {
    font-weight: 400;
    font-size: 1.1rem;
    transition: color 0.3s;
    position: relative;
}

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--primary-color);
    transition: width 0.3s ease;
}

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

.nav-links a:hover::after {
    width: 100%;
}

/* Hero Section */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding-top: 5rem;
}

.hero-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
}

.hero-text {
    opacity: 0;
    transform: translateY(30px);
    animation: fadeUp 1s forwards 0.5s;
}

.greeting {
    font-size: 1.5rem;
    color: var(--accent-color);
    margin-bottom: 0.5rem;
}

.name {
    font-size: 2.5rem;
    line-height: 1.2;
    margin-bottom: 1rem;
}

.name span {
    font-size: 4rem;
    background: linear-gradient(135deg, #fff, #94a3b8);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.title {
    font-size: 1.2rem;
    color: var(--text-muted);
    margin-bottom: 2.5rem;
}

.hero-image-container {
    display: flex;
    justify-content: center;
    align-items: center;
    opacity: 0;
    transform: scale(0.9);
    animation: popIn 1s forwards 0.8s;
}

.image-wrapper {
    position: relative;
    width: 400px;
    height: 400px;
    border-radius: 50%;
    padding: 10px;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    box-shadow: 0 10px 40px rgba(99, 102, 241, 0.4);
}

.profile-img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    border-radius: 50%;
    border: 5px solid var(--bg-color);
}

.badge {
    position: absolute;
    bottom: 20px;
    right: 0;
    padding: 1rem 1.5rem;
    display: flex;
    align-items: center;
    gap: 1rem;
    border-radius: 20px;
    animation: bounce 3s infinite;
}

.badge i {
    font-size: 2rem;
    color: var(--accent-color);
}

.badge-text {
    display: flex;
    flex-direction: column;
}

.badge-text strong {
    font-size: 1.2rem;
    line-height: 1;
}

.badge-text span {
    font-size: 0.8rem;
    color: var(--text-muted);
}

/* Section Headers */
.section-header {
    text-align: center;
    margin-bottom: 4rem;
}

.section-title {
    font-size: 2.5rem;
    margin-bottom: 1rem;
    display: inline-block;
}

.section-subtitle {
    color: var(--text-muted);
    font-size: 1.1rem;
}

.line {
    height: 4px;
    width: 80px;
    background: linear-gradient(to right, var(--primary-color), var(--secondary-color));
    margin: 1rem auto 0;
    border-radius: 2px;
}

/* Timeline (Education) */
.timeline {
    position: relative;
    max-width: 800px;
    margin: 0 auto;
}

.timeline::before {
    content: '';
    position: absolute;
    top: 0;
    left: 20px;
    height: 100%;
    width: 4px;
    background: var(--glass-border);
    border-radius: 2px;
}

.timeline-item {
    position: relative;
    margin-bottom: 3rem;
    padding-left: 60px;
}

.timeline-dot {
    position: absolute;
    top: 20px;
    left: 12px;
    width: 20px;
    height: 20px;
    background: var(--primary-color);
    border-radius: 50%;
    border: 4px solid var(--bg-color);
    box-shadow: 0 0 10px var(--primary-glow);
    z-index: 1;
}

.timeline-content {
    padding: 2rem;
    transition: transform 0.3s ease;
}

.timeline-content:hover {
    transform: translateX(10px);
    border-color: rgba(99, 102, 241, 0.5);
}

.year {
    display: inline-block;
    padding: 0.4rem 1rem;
    background: rgba(99, 102, 241, 0.2);
    color: var(--primary-color);
    border-radius: 20px;
    font-size: 0.9rem;
    font-weight: 600;
    margin-bottom: 1rem;
}

.degree {
    font-size: 1.5rem;
    margin-bottom: 0.5rem;
}

.major {
    color: var(--text-muted);
    font-weight: 400;
    margin-bottom: 1rem;
}

.institution {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--accent-color);
    font-size: 0.95rem;
}

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

.expertise-card {
    padding: 2.5rem 2rem;
    text-align: center;
    transition: all 0.4s ease;
}

.expertise-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 15px 35px rgba(0, 0, 0, 0.4);
    border-color: var(--accent-color);
}

.expertise-icon {
    font-size: 3rem;
    color: var(--accent-color);
    margin-bottom: 1.5rem;
}

.expertise-card h3 {
    font-size: 1.2rem;
    margin-bottom: 1rem;
    color: var(--text-main);
}

.expertise-card p {
    color: var(--text-muted);
    font-size: 0.95rem;
    line-height: 1.6;
}

/* Courses Section */
.courses-grid {
    display: flex;
    flex-wrap: wrap;
    gap: 1.5rem;
    justify-content: center;
}

.course-item {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 1rem 1.5rem;
    border-radius: 50px;
    transition: all 0.3s ease;
    background: rgba(30, 41, 59, 0.6);
}

.course-item:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 20px rgba(0, 0, 0, 0.3);
    border-color: var(--primary-color);
    background: rgba(99, 102, 241, 0.1);
}

.course-icon {
    font-size: 1.2rem;
    color: var(--primary-color);
}

.course-item span {
    font-weight: 400;
    font-size: 0.95rem;
}

/* Publications */
.cards-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 2.5rem;
}

.publication-card {
    padding: 2.5rem 2rem;
    transition: all 0.4s ease;
    position: relative;
    overflow: hidden;
}

.publication-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 4px;
    background: linear-gradient(to right, var(--primary-color), var(--secondary-color));
    transform: scaleX(0);
    transform-origin: left;
    transition: transform 0.4s ease;
}

.publication-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 15px 35px rgba(0, 0, 0, 0.4);
}

.publication-card:hover::before {
    transform: scaleX(1);
}

.card-icon {
    font-size: 2.5rem;
    color: var(--primary-color);
    margin-bottom: 1.5rem;
}

.card-year {
    position: absolute;
    top: 2.5rem;
    right: 2rem;
    font-size: 3rem;
    font-weight: 800;
    color: rgba(255, 255, 255, 0.05);
}

.card-title {
    font-size: 1.2rem;
    margin-bottom: 1rem;
    line-height: 1.5;
}

.card-authors {
    color: var(--accent-color);
    font-size: 0.9rem;
    margin-bottom: 1rem;
}

.card-journal {
    color: var(--text-muted);
    font-size: 0.9rem;
    line-height: 1.6;
}

/* Footer */
footer {
    background: rgba(15, 23, 42, 0.8);
    border-top: 1px solid var(--glass-border);
    padding: 4rem 0 2rem;
    text-align: center;
}

.footer-content h2 {
    margin-bottom: 0.5rem;
}

.footer-content p {
    color: var(--text-muted);
    margin-bottom: 2rem;
}

.social-links {
    display: flex;
    justify-content: center;
    gap: 1.5rem;
    margin-bottom: 2rem;
}

.social-links a {
    width: 45px;
    height: 45px;
    border-radius: 50%;
    background: var(--glass-bg);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
    transition: all 0.3s ease;
    border: 1px solid var(--glass-border);
}

.social-links a:hover {
    background: var(--primary-color);
    transform: translateY(-5px);
}

.copyright {
    font-size: 0.9rem;
    border-top: 1px solid var(--glass-border);
    padding-top: 2rem;
}

/* Animations */
@keyframes fadeUp {
    from { opacity: 0; transform: translateY(30px); }
    to { opacity: 1; transform: translateY(0); }
}

@keyframes popIn {
    from { opacity: 0; transform: scale(0.9); }
    to { opacity: 1; transform: scale(1); }
}

@keyframes bounce {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-10px); }
}

/* Responsive */
@media (max-width: 992px) {
    .hero-content {
        grid-template-columns: 1fr;
        text-align: center;
        gap: 3rem;
    }
    
    .hero-text {
        order: 2;
    }
    
    .hero-image-container {
        order: 1;
    }
    
    .hero-buttons {
        justify-content: center;
    }
    
    .name span {
        font-size: 3rem;
    }
}

@media (max-width: 768px) {
    .nav-links {
        display: none;
    }
    
    .image-wrapper {
        width: 300px;
        height: 300px;
    }
    
    .name span {
        font-size: 2.5rem;
    }
    
    .timeline::before {
        left: 0;
    }
    
    .timeline-item {
        padding-left: 30px;
    }
    
    .timeline-dot {
        left: -8px;
    }
}