/* Modern CSS Reset */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --primary-color: #667eea;
    --secondary-color: #764ba2;
    --accent-color: #f093fb;
    --text-color: #2d3748;
    --light-bg: #f7fafc;
    --white: #ffffff;
    --gradient-primary: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    --gradient-secondary: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
    --shadow-soft: 0 10px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
    --shadow-hover: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    line-height: 1.6;
    color: var(--text-color);
    background: var(--light-bg);
    overflow-x: hidden;
}

/* Animated Background */
body::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(45deg, #667eea 0%, #764ba2 25%, #f093fb 50%, #f5576c 75%, #667eea 100%);
    background-size: 400% 400%;
    animation: gradientShift 15s ease infinite;
    opacity: 0.05;
    z-index: -1;
}

@keyframes gradientShift {
    0% { background-position: 0% 50%; }
    50% { background-position: 100% 50%; }
    100% { background-position: 0% 50%; }
}

/* Modern Navigation */
nav {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    padding: 1.5rem;
    box-shadow: var(--shadow-soft);
    position: sticky;
    top: 0;
    z-index: 100;
    border-bottom: 1px solid rgba(255, 255, 255, 0.2);
}

nav ul {
    list-style: none;
    display: flex;
    justify-content: center;
    gap: 2rem;
    max-width: 1200px;
    margin: 0 auto;
}

nav ul li a {
    color: var(--text-color);
    text-decoration: none;
    font-weight: 500;
    padding: 0.8rem 1.5rem;
    border-radius: 50px;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
    overflow: hidden;
}

nav ul li a::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: var(--gradient-primary);
    transition: left 0.3s ease;
    z-index: -1;
}

nav ul li a:hover::before {
    left: 0;
}

nav ul li a:hover {
    color: var(--white);
    transform: translateY(-2px);
    box-shadow: var(--shadow-soft);
}

nav ul li a.active {
    background: var(--gradient-primary);
    color: var(--white);
    box-shadow: var(--shadow-soft);
}

/* Main content */
main {
    max-width: 1200px;
    margin: 3rem auto;
    padding: 3rem;
    background: rgba(255, 255, 255, 0.9);
    backdrop-filter: blur(10px);
    border-radius: 2rem;
    box-shadow: var(--shadow-soft);
    border: 1px solid rgba(255, 255, 255, 0.2);
    position: relative;
    overflow: hidden;
    animation: fadeInUp 0.8s ease-out;
}

main::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -50%;
    width: 100%;
    height: 100%;
    background: var(--gradient-secondary);
    opacity: 0.05;
    border-radius: 50%;
    z-index: -1;
}

h1 {
    font-size: 3.5rem;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 2rem;
    font-weight: 800;
    text-align: center;
    position: relative;
}

h1::after {
    content: '';
    position: absolute;
    bottom: -10px;
    left: 50%;
    transform: translateX(-50%);
    width: 100px;
    height: 4px;
    background: var(--gradient-primary);
    border-radius: 2px;
}

/* Profile styles */
.profile {
    display: grid;
    grid-template-columns: 400px 1fr;
    gap: 4rem;
    margin-top: 3rem;
    align-items: start;
}

.profile-img {
    width: 100%;
    border-radius: 2rem;
    box-shadow: var(--shadow-soft);
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
    overflow: hidden;
}

.profile-img::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: var(--gradient-primary);
    opacity: 0;
    transition: opacity 0.3s ease;
    z-index: 1;
}

.profile-img:hover {
    transform: scale(1.05) rotate(2deg);
    box-shadow: var(--shadow-hover);
}

.profile-img:hover::before {
    opacity: 0.1;
}

.bio {
    color: var(--text-color);
}

.bio h2 {
    font-size: 1.8rem;
    margin: 2.5rem 0 1.5rem;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    font-weight: 700;
    position: relative;
    padding-bottom: 0.5rem;
}

.bio h2::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 50px;
    height: 3px;
    background: var(--gradient-primary);
    border-radius: 2px;
}

.bio h2:first-child {
    margin-top: 0;
}

.bio p {
    line-height: 1.8;
    margin-bottom: 1.5rem;
    color: var(--text-color);
    font-size: 1.1rem;
}

.bio ul {
    list-style: none;
    margin-left: 0;
    margin-bottom: 2rem;
}

.bio ul li {
    margin-bottom: 1rem;
    padding: 1rem 1.5rem;
    background: rgba(102, 126, 234, 0.05);
    border-radius: 1rem;
    border-left: 4px solid var(--primary-color);
    transition: all 0.3s ease;
    position: relative;
}

.bio ul li:hover {
    background: rgba(102, 126, 234, 0.1);
    transform: translateX(10px);
}

.bio ul li::before {
    content: "✦";
    color: var(--primary-color);
    font-weight: bold;
    position: absolute;
    left: -10px;
    top: 50%;
    transform: translateY(-50%);
    background: var(--white);
    padding: 0.2rem;
    border-radius: 50%;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

/* Project styles */
.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 2.5rem;
    margin-top: 3rem;
}

.project-card {
    background: rgba(255, 255, 255, 0.8);
    padding: 2.5rem;
    border-radius: 1.5rem;
    box-shadow: var(--shadow-soft);
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    border: 1px solid rgba(255, 255, 255, 0.2);
    position: relative;
    overflow: hidden;
}

.project-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: var(--gradient-primary);
}

.project-card:hover {
    transform: translateY(-10px) scale(1.02);
    box-shadow: var(--shadow-hover);
}

.project-meta {
    color: var(--secondary-color);
    font-size: 0.9rem;
    margin: 1rem 0;
    font-weight: 500;
}

.project-links {
    margin-top: 2rem;
    display: flex;
    gap: 1rem;
}

.button {
    display: inline-block;
    padding: 1rem 2rem;
    background: var(--gradient-primary);
    color: var(--white);
    text-decoration: none;
    border-radius: 50px;
    font-weight: 600;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
    overflow: hidden;
}

.button::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: var(--gradient-secondary);
    transition: left 0.3s ease;
    z-index: -1;
}

.button:hover::before {
    left: 0;
}

.button:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-hover);
}

/* Form styles */
form {
    background: rgba(255, 255, 255, 0.8);
    padding: 2.5rem;
    border-radius: 1.5rem;
    box-shadow: var(--shadow-soft);
}

form div {
    margin-bottom: 2rem;
}

label {
    display: block;
    margin-bottom: 0.8rem;
    font-weight: 600;
    color: var(--text-color);
    font-size: 1.1rem;
}

input, textarea {
    width: 100%;
    padding: 1rem 1.5rem;
    border: 2px solid rgba(102, 126, 234, 0.2);
    border-radius: 1rem;
    transition: all 0.3s ease;
    background: rgba(255, 255, 255, 0.8);
    font-size: 1rem;
}

input:focus, textarea:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
    transform: translateY(-2px);
}

button {
    background: var(--gradient-primary);
    color: var(--white);
    padding: 1rem 2.5rem;
    border: none;
    border-radius: 50px;
    cursor: pointer;
    font-weight: 600;
    font-size: 1.1rem;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
    overflow: hidden;
}

button::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: var(--gradient-secondary);
    transition: left 0.3s ease;
    z-index: -1;
}

button:hover::before {
    left: 0;
}

button:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-hover);
}

/* Footer */
footer {
    text-align: center;
    margin-top: 4rem;
    padding: 3rem;
    background: rgba(255, 255, 255, 0.9);
    backdrop-filter: blur(10px);
    color: var(--text-color);
    box-shadow: var(--shadow-soft);
    border-top: 1px solid rgba(255, 255, 255, 0.2);
}

/* Blog styles */
.blog-list {
    list-style: none;
    display: grid;
    gap: 2rem;
}

.blog-list li {
    background: rgba(255, 255, 255, 0.8);
    padding: 2rem;
    border-radius: 1.5rem;
    box-shadow: var(--shadow-soft);
    transition: all 0.3s ease;
    border: 1px solid rgba(255, 255, 255, 0.2);
}

.blog-list li:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-hover);
}

.blog-list a {
    color: var(--primary-color);
    text-decoration: none;
    font-weight: 600;
    font-size: 1.2rem;
}

.date {
    color: var(--secondary-color);
    margin-bottom: 1rem;
    font-weight: 500;
}

/* Responsive design */
@media (max-width: 768px) {
    .profile {
        grid-template-columns: 1fr;
        gap: 2rem;
    }
    
    .profile-img {
        max-width: 300px;
        margin: 0 auto;
    }
    
    nav ul {
        flex-direction: column;
        align-items: center;
        gap: 1rem;
    }
    
    main {
        padding: 2rem;
        margin: 1rem;
    }
    
    h1 {
        font-size: 2.5rem;
    }
    
    .projects-grid {
        grid-template-columns: 1fr;
    }
}

/* Loading animation */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Featured research styles */
.research-list {
    list-style: none;
    margin-top: 1rem;
}

.research-list li {
    margin-bottom: 1.5rem;
    padding: 1rem;
    background: #f8f8f8;
    border-radius: 8px;
}

.research-list h3 {
    color: #333;
    margin-bottom: 0.5rem;
}

/* Home page specific styles */
.intro {
    text-align: center;
    margin-bottom: 4rem;
}

.lead {
    font-size: 1.5rem;
    color: var(--secondary-color);
    font-weight: 600;
    margin-bottom: 1.5rem;
}

.featured h2 {
    font-size: 2.5rem;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    text-align: center;
    margin-bottom: 3rem;
    font-weight: 700;
}

.research-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
    margin-top: 2rem;
}

.research-card {
    background: rgba(255, 255, 255, 0.8);
    padding: 2.5rem;
    border-radius: 1.5rem;
    box-shadow: var(--shadow-soft);
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    border: 1px solid rgba(255, 255, 255, 0.2);
    text-align: center;
    position: relative;
    overflow: hidden;
}

.research-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: var(--gradient-secondary);
}

.research-card:hover {
    transform: translateY(-10px) scale(1.02);
    box-shadow: var(--shadow-hover);
}

.research-card h3 {
    font-size: 1.5rem;
    color: var(--primary-color);
    margin-bottom: 1rem;
    font-weight: 700;
}

.research-card p {
    color: var(--text-color);
    line-height: 1.6;
    font-size: 1.1rem;
}