:root {
    --primary-color: #0866ff; /* Facebook Blue */
    --secondary-color: #050505; /* Facebook Dark Text */
    --accent-color: #0866ff; /* Facebook Blue */
    --bg-color: #f0f2f5; /* Facebook Background */
    --text-color: #1c1e21; /* Facebook Text */
    --light-text: #65676b; /* Facebook Secondary Text */
    --white: #ffffff;
    --transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Inter', sans-serif;
    line-height: 1.7;
    color: var(--text-color);
    background-color: var(--bg-color);
    overflow-x: hidden;
}

/* Navigation */
nav {
    background: rgba(255, 255, 255, 0.9);
    backdrop-filter: blur(10px);
    padding: 1.2rem 8%;
    position: fixed;
    width: 100%;
    top: 0;
    z-index: 1000;
    display: flex;
    justify-content: space-between;
    align-items: center;
    box-shadow: 0 1px 3px rgba(0,0,0,0.05);
}

.logo {
    font-size: 1.4rem;
    font-weight: 700;
    color: var(--primary-color);
    text-decoration: none;
    letter-spacing: -0.5px;
}

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

.nav-links li {
    margin-left: 2.5rem;
}

.nav-links a {
    text-decoration: none;
    color: var(--light-text);
    font-weight: 500;
    font-size: 0.95rem;
    transition: var(--transition);
}

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

/* Hero Section */
.hero {
    height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    background: linear-gradient(135deg, rgba(8, 102, 255, 0.9), rgba(8, 102, 255, 0.7)), url('assets/profile.webp');
    background-size: cover;
    background-position: center;
    background-attachment: fixed;
    color: var(--white);
    padding: 0 10%;
}

.hero-content h1 {
    font-size: 4.5rem;
    font-weight: 800;
    margin-bottom: 1.5rem;
    letter-spacing: -2px;
    animation: fadeInUp 1s ease;
}

.hero-content p {
    font-size: 1.4rem;
    font-weight: 300;
    max-width: 800px;
    margin: 0 auto 2.5rem;
    opacity: 0.9;
    animation: fadeInUp 1.2s ease;
}

.cta-button {
    display: inline-block;
    padding: 1rem 2.5rem;
    background: var(--accent-color);
    color: var(--white);
    text-decoration: none;
    border-radius: 50px;
    font-weight: 600;
    transition: var(--transition);
    animation: fadeInUp 1.4s ease;
}

.cta-button:hover {
    transform: translateY(-3px);
    box-shadow: 0 10px 20px rgba(59, 130, 246, 0.3);
}

/* Sections */
section {
    padding: 8rem 12%;
}

.section-title {
    text-align: center;
    font-size: 2.8rem;
    font-weight: 700;
    margin-bottom: 4rem;
    color: var(--primary-color);
    letter-spacing: -1px;
}

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

.about-text p {
    margin-bottom: 1.5rem;
    font-size: 1.1rem;
}

.education-box {
    background: var(--white);
    padding: 2.5rem;
    border-radius: 16px;
    box-shadow: 0 4px 20px rgba(0,0,0,0.03);
}

.education-box h3 {
    margin-bottom: 1.5rem;
    color: var(--accent-color);
}

.education-box ul {
    list-style: none;
}

.education-box li {
    margin-bottom: 1.5rem;
    padding-left: 1.5rem;
    border-left: 2px solid #e2e8f0;
}

/* Timeline */
.timeline {
    max-width: 800px;
    margin: 0 auto;
}

.timeline-item {
    display: flex;
    margin-bottom: 3rem;
}

.timeline-date {
    min-width: 150px;
    font-weight: 700;
    color: var(--accent-color);
}

.timeline-content h3 {
    font-size: 1.2rem;
    margin-bottom: 0.5rem;
}

/* Cards */
.card-container {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2.5rem;
}

.card {
    background: var(--white);
    padding: 3rem 2rem;
    border-radius: 20px;
    text-align: center;
    box-shadow: 0 4px 20px rgba(0,0,0,0.03);
    transition: var(--transition);
}

.card:hover {
    transform: translateY(-10px);
    box-shadow: 0 20px 40px rgba(0,0,0,0.06);
}

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

/* Publications */
.pub-list {
    max-width: 900px;
    margin: 0 auto 4rem;
}

.pub-item {
    display: flex;
    gap: 2rem;
    padding: 2rem;
    background: var(--white);
    border-radius: 16px;
    margin-bottom: 1.5rem;
    transition: var(--transition);
}

.pub-item:hover {
    background: #f1f5f9;
}

.pub-year {
    font-weight: 800;
    color: #cbd5e1;
    font-size: 1.5rem;
}

.pub-details h4 {
    margin-bottom: 0.5rem;
    color: var(--primary-color);
}

.pub-details a {
    display: inline-block;
    margin-top: 1rem;
    color: var(--accent-color);
    text-decoration: none;
    font-weight: 600;
    font-size: 0.9rem;
}

/* Resources */
.resource-card {
    background: var(--primary-color);
    color: var(--white);
    padding: 3rem;
    border-radius: 24px;
    text-align: center;
}

.resource-card h3 {
    margin-bottom: 2rem;
}

.resource-card ul {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 1.5rem;
    list-style: none;
}

.resource-card a {
    color: var(--white);
    text-decoration: none;
    padding: 0.8rem 1.5rem;
    border: 1px solid rgba(255,255,255,0.2);
    border-radius: 50px;
    transition: var(--transition);
}

.resource-card a:hover {
    background: var(--white);
    color: var(--primary-color);
}

/* Contact Grid */
.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
}

.contact-info p {
    margin-bottom: 1.5rem;
    font-size: 1.1rem;
}

.contact-info i {
    width: 30px;
    color: var(--accent-color);
}

.skills-box {
    background: #f1f5f9;
    padding: 2.5rem;
    border-radius: 16px;
}

/* Table */
.table-container {
    overflow-x: auto;
}

table {
    width: 100%;
    border-collapse: separate;
    border-spacing: 0 10px;
}

th {
    text-align: left;
    padding: 1rem 2rem;
    color: var(--light-text);
    font-weight: 600;
    text-transform: uppercase;
    font-size: 0.8rem;
}

td {
    padding: 1.5rem 2rem;
    background: #f8fafc;
    border-top: 1px solid #f1f5f9;
    border-bottom: 1px solid #f1f5f9;
}

td:first-child {
    border-left: 1px solid #f1f5f9;
    border-radius: 12px 0 0 12px;
    font-weight: 600;
}

td:last-child {
    border-right: 1px solid #f1f5f9;
    border-radius: 0 12px 12px 0;
}

/* Footer */
footer {
    padding: 4rem;
    text-align: center;
    background: var(--primary-color);
    color: rgba(255,255,255,0.6);
    font-size: 0.9rem;
}

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

.reveal {
    opacity: 0;
    transform: translateY(40px);
    transition: all 0.8s cubic-bezier(0.4, 0, 0.2, 1);
}

.reveal.active {
    opacity: 1;
    transform: translateY(0);
}

/* Responsive */
@media (max-width: 1024px) {
    .about-container, .contact-grid { grid-template-columns: 1fr; }
    .hero-content h1 { font-size: 3rem; }
}

@media (max-width: 768px) {
    .nav-links { display: none; }
    section { padding: 5rem 8%; }
    .hero-content h1 { font-size: 2.5rem; }
}