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

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Inter', sans-serif;
    line-height: 1.6;
    color: #333;
    overflow-x: hidden;
}

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

/* Navigation */
.navbar {
    position: fixed;
    top: 0;
    width: 100%;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    z-index: 1000;
    transition: all 0.3s ease;
    border-bottom: 1px solid rgba(0, 0, 0, 0.1);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 70px;
}

.nav-logo span {
    font-size: 1.8rem;
    font-weight: 700;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

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

.nav-link {
    text-decoration: none;
    color: #333;
    font-weight: 500;
    transition: color 0.3s ease;
    position: relative;
}

.nav-link:hover {
    color: #667eea;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 2px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    transition: width 0.3s ease;
}

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

.hamburger {
    display: none;
    flex-direction: column;
    cursor: pointer;
}

.bar {
    width: 25px;
    height: 3px;
    background: #333;
    margin: 3px 0;
    transition: 0.3s;
}

/* Hero Section */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    background: linear-gradient(135deg, #f5f7fa 0%, #c3cfe2 100%);
    padding-top: 70px;
}

.hero-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
}

.hero-title {
    font-size: 3.5rem;
    font-weight: 700;
    margin-bottom: 1rem;
    line-height: 1.2;
}

.highlight {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: 1.5rem;
    font-weight: 600;
    color: #555;
    margin-bottom: 1.5rem;
}

.hero-description {
    font-size: 1.1rem;
    color: #666;
    margin-bottom: 2rem;
    line-height: 1.8;
}

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

.btn {
    padding: 12px 30px;
    border: none;
    border-radius: 50px;
    font-size: 1rem;
    font-weight: 600;
    text-decoration: none;
    display: inline-block;
    transition: all 0.3s ease;
    cursor: pointer;
}

.btn-primary {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 25px rgba(102, 126, 234, 0.3);
}

.btn-secondary {
    background: transparent;
    color: #667eea;
    border: 2px solid #667eea;
}

.btn-secondary:hover {
    background: #667eea;
    color: white;
    transform: translateY(-2px);
}

.hero-visual {
    display: flex;
    justify-content: center;
    align-items: center;
}

.hero-illustration {
    position: relative;
    width: 500px;
    height: 500px;
}

.floating-card {
    position: absolute;
    background: white;
    padding: 1rem;
    border-radius: 15px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.5rem;
    animation: float 6s ease-in-out infinite;
    transition: all 0.3s ease;
    cursor: pointer;
    min-width: 80px;
}

.floating-card:hover {
    transform: scale(1.1) translateY(-5px);
    box-shadow: 0 15px 40px rgba(102, 126, 234, 0.2);
    z-index: 10;
}

.floating-card i {
    font-size: 2rem;
    color: #667eea;
}

.floating-card span {
    font-weight: 600;
    color: #333;
    font-size: 0.9rem;
    text-align: center;
}

/* Different colors for different card types */
.card-1, .card-3, .card-5 { /* AEM, Architecture, MCP */
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
}

.card-1 i, .card-3 i, .card-5 i {
    color: white;
}

.card-1 span, .card-3 span, .card-5 span {
    color: white;
}

.card-2, .card-4, .card-6 { /* AI, RAG, LLMs */
    background: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
    color: white;
}

.card-2 i, .card-4 i, .card-6 i {
    color: white;
}

.card-2 span, .card-4 span, .card-6 span {
    color: white;
}

.card-7, .card-8 { /* GenAI, Frontier */
    background: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%);
    color: white;
}

.card-7 i, .card-8 i {
    color: white;
}

.card-7 span, .card-8 span {
    color: white;
}

.card-1 {
    top: 15%;
    left: 5%;
    animation-delay: 0s;
}

.card-2 {
    top: 25%;
    right: 15%;
    animation-delay: 0.5s;
}

.card-3 {
    top: 45%;
    left: 20%;
    animation-delay: 1s;
}

.card-4 {
    top: 55%;
    right: 25%;
    animation-delay: 1.5s;
}

.card-5 {
    top: 70%;
    left: 15%;
    animation-delay: 2s;
}

.card-6 {
    top: 80%;
    right: 10%;
    animation-delay: 2.5s;
}

.card-7 {
    top: 35%;
    left: 45%;
    animation-delay: 3s;
}

.card-8 {
    top: 65%;
    left: 45%;
    animation-delay: 3.5s;
}

@keyframes float {
    0%, 100% { 
        transform: translateY(0px) rotate(0deg); 
    }
    25% { 
        transform: translateY(-15px) rotate(1deg); 
    }
    50% { 
        transform: translateY(-25px) rotate(0deg); 
    }
    75% { 
        transform: translateY(-15px) rotate(-1deg); 
    }
}

/* Section Styles */
section {
    padding: 80px 0;
}

.section-title {
    text-align: center;
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 3rem;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* About Section */
.about {
    background: white;
}

.about-content {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 4rem;
    align-items: center;
}

.about-text p {
    margin-bottom: 1.5rem;
    font-size: 1.1rem;
    color: #555;
    line-height: 1.8;
}

.about-stats {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
    margin-top: 2rem;
}

.stat {
    text-align: center;
    padding: 1.5rem;
    background: linear-gradient(135deg, #f5f7fa 0%, #c3cfe2 100%);
    border-radius: 15px;
    transition: transform 0.3s ease;
}

.stat:hover {
    transform: translateY(-5px);
}

.stat-number {
    display: block;
    font-size: 2rem;
    font-weight: 700;
    color: #667eea;
    margin-bottom: 0.5rem;
}

.stat-label {
    font-size: 0.9rem;
    color: #666;
    font-weight: 500;
}

.about-image {
    display: flex;
    justify-content: center;
    align-items: center;
}

.image-placeholder {
    width: 300px;
    height: 300px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 4rem;
}

/* Experience Section */
.experience {
    background: #f8f9fa;
}

.timeline {
    position: relative;
    max-width: 800px;
    margin: 0 auto;
}

.timeline::before {
    content: '';
    position: absolute;
    left: 50%;
    top: 0;
    bottom: 0;
    width: 2px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    transform: translateX(-50%);
}

.timeline-item {
    margin-bottom: 3rem;
    position: relative;
}

.timeline-content {
    background: white;
    padding: 2rem;
    border-radius: 15px;
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.1);
    position: relative;
    width: 45%;
    margin-left: 55%;
}

.timeline-item:nth-child(even) .timeline-content {
    margin-left: 0;
    margin-right: 55%;
}

.timeline-content::before {
    content: '';
    position: absolute;
    top: 50%;
    width: 20px;
    height: 20px;
    background: #667eea;
    border-radius: 50%;
    transform: translateY(-50%);
}

.timeline-item:nth-child(odd) .timeline-content::before {
    left: -60px;
}

.timeline-item:nth-child(even) .timeline-content::before {
    right: -60px;
}

.timeline-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1rem;
}

.timeline-header h3 {
    font-size: 1.3rem;
    font-weight: 600;
    color: #333;
}

.timeline-date {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 0.3rem 0.8rem;
    border-radius: 20px;
    font-size: 0.9rem;
    font-weight: 500;
}

.timeline-company {
    color: #667eea;
    font-weight: 600;
    margin-bottom: 1rem;
}

.timeline-achievements {
    list-style: none;
}

.timeline-achievements li {
    margin-bottom: 0.5rem;
    padding-left: 1.5rem;
    position: relative;
    color: #555;
}

.timeline-achievements li::before {
    content: '▸';
    position: absolute;
    left: 0;
    color: #667eea;
    font-weight: bold;
}

/* Skills Section */
.skills {
    background: white;
}

.skills-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 3rem;
}

.skill-category h3 {
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: 2rem;
    color: #333;
    text-align: center;
}

.skill-items {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

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

.skill-name {
    font-weight: 500;
    color: #555;
}

.skill-bar {
    height: 8px;
    background: #f0f0f0;
    border-radius: 4px;
    overflow: hidden;
}

.skill-progress {
    height: 100%;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    border-radius: 4px;
    transition: width 1.5s ease;
    animation: skillFill 2s ease-out;
}

@keyframes skillFill {
    from { width: 0; }
}

/* Projects Section */
.projects {
    background: #f8f9fa;
}

.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}

.project-card {
    background: white;
    border-radius: 15px;
    overflow: hidden;
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.1);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.project-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 15px 40px rgba(0, 0, 0, 0.15);
}

.project-image {
    height: 200px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 3rem;
}

.project-content {
    padding: 1.5rem;
}

.project-content h3 {
    font-size: 1.3rem;
    font-weight: 600;
    margin-bottom: 1rem;
    color: #333;
}

.project-content p {
    color: #666;
    margin-bottom: 1.5rem;
    line-height: 1.6;
}

.project-tech {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.project-tech span {
    background: #f0f0f0;
    color: #555;
    padding: 0.3rem 0.8rem;
    border-radius: 20px;
    font-size: 0.8rem;
    font-weight: 500;
}

/* Contact Section */
.contact {
    background: white;
}

.contact-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: start;
}

.contact-info h3 {
    font-size: 1.8rem;
    font-weight: 600;
    margin-bottom: 1.5rem;
    color: #333;
}

.contact-info p {
    color: #666;
    line-height: 1.8;
    margin-bottom: 2rem;
}

.contact-methods {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.contact-method {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 1rem;
    background: #f8f9fa;
    border-radius: 10px;
    transition: transform 0.3s ease;
}

.contact-method:hover {
    transform: translateX(5px);
}

.contact-method i {
    font-size: 1.2rem;
    color: #667eea;
    width: 20px;
}

.contact-form {
    background: #f8f9fa;
    padding: 2rem;
    border-radius: 15px;
}

.form-group {
    margin-bottom: 1.5rem;
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 1rem;
    border: 2px solid transparent;
    border-radius: 10px;
    font-size: 1rem;
    transition: border-color 0.3s ease;
    background: white;
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: #667eea;
}

.form-group textarea {
    resize: vertical;
    min-height: 120px;
}

/* Footer */
.footer {
    background: #333;
    color: white;
    padding: 2rem 0;
}

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

.footer-social {
    display: flex;
    gap: 1rem;
}

.footer-social a {
    color: white;
    font-size: 1.2rem;
    transition: color 0.3s ease;
}

.footer-social a:hover {
    color: #667eea;
}

/* Responsive Design */

/* Tablet and small desktop */
@media (max-width: 1024px) {
    .hero-container {
        gap: 3rem;
    }
    
    .hero-title {
        font-size: 3rem;
    }
    
    .about-content {
        gap: 3rem;
    }
    
    .skills-grid {
        grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
        gap: 2.5rem;
    }
    
    .projects-grid {
        grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
        gap: 2rem;
    }
    
    .contact-content {
        gap: 3rem;
    }
}

/* Mobile devices */
@media (max-width: 768px) {
    /* Navigation */
    .hamburger {
        display: flex;
    }
    
    .nav-menu {
        position: fixed;
        left: -100%;
        top: 70px;
        flex-direction: column;
        background-color: white;
        width: 100%;
        text-align: center;
        transition: 0.3s;
        box-shadow: 0 10px 27px rgba(0, 0, 0, 0.05);
        padding: 2rem 0;
    }
    
    .nav-menu.active {
        left: 0;
    }
    
    /* Hero Section */
    .hero-container {
        grid-template-columns: 1fr;
        text-align: center;
        gap: 2rem;
        padding: 0 15px;
    }
    
    .hero-title {
        font-size: 2.5rem;
        line-height: 1.1;
        margin-bottom: 0.8rem;
    }
    
    .hero-subtitle {
        font-size: 1.3rem;
        line-height: 1.4;
        margin-bottom: 1.2rem;
    }
    
    .hero-description {
        font-size: 1rem;
        line-height: 1.6;
        margin-bottom: 1.5rem;
    }
    
    .hero-buttons {
        justify-content: center;
        gap: 1rem;
    }
    
    .btn {
        padding: 10px 25px;
        font-size: 0.9rem;
    }
    
    .hero-illustration {
        width: 350px;
        height: 350px;
    }
    
    .floating-card {
        padding: 0.8rem;
        min-width: 70px;
        font-size: 0.9rem;
    }
    
    .floating-card i {
        font-size: 1.5rem;
    }
    
    .floating-card span {
        font-size: 0.8rem;
    }
    
    /* Adjust floating card positions for mobile */
    .card-1 { top: 10%; left: 2%; }
    .card-2 { top: 20%; right: 10%; }
    .card-3 { top: 40%; left: 15%; }
    .card-4 { top: 50%; right: 20%; }
    .card-5 { top: 65%; left: 10%; }
    .card-6 { top: 75%; right: 8%; }
    .card-7 { top: 30%; left: 40%; }
    .card-8 { top: 60%; left: 40%; }
    
    /* About Section */
    .about-content {
        grid-template-columns: 1fr;
        gap: 2rem;
        padding: 0 15px;
    }
    
    .about-text p {
        font-size: 1rem;
        line-height: 1.7;
    }
    
    .about-stats {
        grid-template-columns: 1fr;
        gap: 1rem;
    }
    
    .stat {
        padding: 1rem;
    }
    
    .stat-number {
        font-size: 1.8rem;
    }
    
    .about-image .image-placeholder {
        width: 250px;
        height: 250px;
        font-size: 3rem;
    }
    
    /* Experience Section */
    .timeline::before {
        left: 20px;
    }
    
    .timeline-content {
        width: calc(100% - 50px);
        margin-left: 50px;
        padding: 1.5rem;
    }
    
    .timeline-item:nth-child(even) .timeline-content {
        margin-left: 50px;
        margin-right: 0;
    }
    
    .timeline-content::before {
        left: -45px !important;
    }
    
    .timeline-header {
        flex-direction: column;
        align-items: flex-start;
        gap: 0.5rem;
    }
    
    .timeline-header h3 {
        font-size: 1.2rem;
    }
    
    .timeline-date {
        align-self: flex-start;
    }
    
    .timeline-achievements li {
        font-size: 0.9rem;
        line-height: 1.5;
    }
    
    /* Skills Section */
    .skills-grid {
        grid-template-columns: 1fr;
        gap: 2rem;
        padding: 0 15px;
    }
    
    .skill-category h3 {
        font-size: 1.3rem;
        margin-bottom: 1.5rem;
    }
    
    .skill-item {
        gap: 0.8rem;
    }
    
    /* Projects Section */
    .projects-grid {
        grid-template-columns: 1fr;
        gap: 1.5rem;
        padding: 0 15px;
    }
    
    .project-card {
        margin: 0 10px;
    }
    
    .project-content {
        padding: 1.2rem;
    }
    
    .project-content h3 {
        font-size: 1.2rem;
    }
    
    /* Contact Section */
    .contact-content {
        grid-template-columns: 1fr;
        gap: 2rem;
        padding: 0 15px;
    }
    
    .contact-info h3 {
        font-size: 1.6rem;
    }
    
    .contact-form {
        padding: 1.5rem;
    }
    
    .form-group input,
    .form-group textarea {
        padding: 0.8rem;
        font-size: 0.9rem;
    }
    
    /* Footer */
    .footer-content {
        flex-direction: column;
        gap: 1rem;
        text-align: center;
        padding: 0 15px;
    }
    
    /* Chat button mobile adjustments */
    .chat-button {
        bottom: 20px;
        right: 20px;
        width: 55px;
        height: 55px;
        font-size: 20px;
    }
    
    .chat-tooltip {
        display: none;
    }
    
    .chat-modal-content {
        width: 95%;
        max-height: 90vh;
        margin: 20px;
    }
    
    .chat-body {
        height: 350px;
        padding: 15px;
    }
    
    .chat-input-container {
        gap: 8px;
    }
    
    #chatInput {
        padding: 10px 14px;
        font-size: 14px;
    }
    
    .chat-send-btn {
        width: 40px;
        height: 40px;
    }
    
    /* Section spacing adjustments */
    section {
        padding: 60px 0;
    }
    
    .section-title {
        font-size: 2.2rem;
        margin-bottom: 2rem;
    }
    
    .container {
        padding: 0 15px;
    }
}

@media (max-width: 480px) {
    /* Hero Section */
    .hero-title {
        font-size: 2rem;
        line-height: 1.1;
    }
    
    .hero-subtitle {
        font-size: 1.1rem;
        line-height: 1.3;
    }
    
    .hero-description {
        font-size: 0.95rem;
        line-height: 1.5;
    }
    
    .hero-buttons {
        flex-direction: column;
        align-items: center;
        gap: 0.8rem;
    }
    
    .btn {
        width: 100%;
        max-width: 250px;
        text-align: center;
        padding: 12px 20px;
        font-size: 0.9rem;
    }
    
    .hero-illustration {
        width: 300px;
        height: 300px;
    }
    
    .floating-card {
        padding: 0.6rem;
        min-width: 60px;
    }
    
    .floating-card i {
        font-size: 1.3rem;
    }
    
    .floating-card span {
        font-size: 0.7rem;
    }
    
    /* Section Titles */
    .section-title {
        font-size: 1.8rem;
        margin-bottom: 1.5rem;
    }
    
    /* About Section */
    .about-text p {
        font-size: 0.95rem;
        line-height: 1.6;
    }
    
    .about-image .image-placeholder {
        width: 200px;
        height: 200px;
        font-size: 2.5rem;
    }
    
    .stat {
        padding: 0.8rem;
    }
    
    .stat-number {
        font-size: 1.6rem;
    }
    
    .stat-label {
        font-size: 0.8rem;
    }
    
    /* Timeline */
    .timeline-content {
        padding: 1.2rem;
    }
    
    .timeline-header h3 {
        font-size: 1.1rem;
    }
    
    .timeline-date {
        font-size: 0.8rem;
        padding: 0.2rem 0.6rem;
    }
    
    .timeline-achievements li {
        font-size: 0.85rem;
        line-height: 1.4;
    }
    
    /* Skills */
    .skill-category h3 {
        font-size: 1.2rem;
        margin-bottom: 1.2rem;
    }
    
    .skill-name {
        font-size: 0.9rem;
    }
    
    /* Projects */
    .project-content h3 {
        font-size: 1.1rem;
    }
    
    .project-content p {
        font-size: 0.9rem;
        line-height: 1.5;
    }
    
    .project-tech span {
        font-size: 0.75rem;
        padding: 0.2rem 0.6rem;
    }
    
    /* Contact */
    .contact-info h3 {
        font-size: 1.4rem;
    }
    
    .contact-info p {
        font-size: 0.9rem;
        line-height: 1.6;
    }
    
    .contact-form {
        padding: 1.2rem;
    }
    
    .form-group input,
    .form-group textarea {
        padding: 0.7rem;
        font-size: 0.85rem;
    }
    
    /* Chat Modal */
    .chat-modal-content {
        width: 98%;
        margin: 10px;
    }
    
    .chat-header h3 {
        font-size: 16px;
    }
    
    .chat-body {
        height: 300px;
        padding: 12px;
    }
    
    .message-content p {
        font-size: 0.9rem;
        padding: 10px 14px;
    }
    
    /* General spacing */
    section {
        padding: 50px 0;
    }
    
    .container {
        padding: 0 10px;
    }
    
    .nav-container {
        padding: 0 15px;
    }
    
    /* Improve touch targets */
    .nav-link {
        padding: 15px 10px;
        min-height: 44px;
        display: flex;
        align-items: center;
        justify-content: center;
    }
    
    .btn {
        min-height: 44px;
        display: flex;
        align-items: center;
        justify-content: center;
    }
    
    /* Improve form usability on mobile */
    .form-group input,
    .form-group textarea {
        font-size: 16px; /* Prevents zoom on iOS */
    }
    
    /* Better spacing for mobile */
    .hero-buttons {
        margin-top: 1.5rem;
    }
    
    .about-stats {
        margin-top: 1.5rem;
    }
    
    .timeline-item {
        margin-bottom: 2rem;
    }
    
    .skill-item {
        margin-bottom: 1.2rem;
    }
    
    .project-card {
        margin-bottom: 1.5rem;
    }
}

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

.fade-in-up {
    animation: fadeInUp 0.6s ease-out;
}

/* Chat Button and Modal */
.chat-button {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 60px;
    height: 60px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 24px;
    cursor: pointer;
    box-shadow: 0 4px 20px rgba(102, 126, 234, 0.3);
    transition: all 0.3s ease;
    z-index: 1000;
}

.chat-button:hover {
    transform: scale(1.1);
    box-shadow: 0 6px 25px rgba(102, 126, 234, 0.4);
}

.chat-tooltip {
    position: absolute;
    right: 70px;
    background: #333;
    color: white;
    padding: 8px 12px;
    border-radius: 6px;
    font-size: 14px;
    white-space: nowrap;
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
    pointer-events: none;
}

.chat-tooltip::after {
    content: '';
    position: absolute;
    right: -5px;
    top: 50%;
    transform: translateY(-50%);
    border: 5px solid transparent;
    border-left-color: #333;
}

.chat-button:hover .chat-tooltip {
    opacity: 1;
    visibility: visible;
}

.chat-modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    z-index: 2000;
    animation: fadeIn 0.3s ease;
}

.chat-modal.show {
    display: flex;
    align-items: center;
    justify-content: center;
}

.chat-modal-content {
    background: white;
    border-radius: 15px;
    width: 90%;
    max-width: 500px;
    max-height: 80vh;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.2);
    animation: slideUp 0.3s ease;
    overflow: hidden;
}

.chat-header {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.chat-header h3 {
    margin: 0;
    font-size: 18px;
    display: flex;
    align-items: center;
    gap: 10px;
}

.chat-close {
    background: none;
    border: none;
    color: white;
    font-size: 24px;
    cursor: pointer;
    padding: 0;
    width: 30px;
    height: 30px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    transition: background 0.3s ease;
}

.chat-close:hover {
    background: rgba(255, 255, 255, 0.2);
}

.chat-body {
    padding: 20px;
    height: 400px;
    display: flex;
    flex-direction: column;
}

.chat-messages {
    flex: 1;
    overflow-y: auto;
    margin-bottom: 20px;
    padding-right: 10px;
}

.message {
    margin-bottom: 15px;
    display: flex;
    flex-direction: column;
}

.message-content {
    display: flex;
    align-items: flex-start;
    gap: 10px;
    max-width: 80%;
}

.message.user-message .message-content {
    margin-left: auto;
    flex-direction: row-reverse;
}

.message-content i {
    width: 20px;
    height: 20px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 12px;
    flex-shrink: 0;
}

.bot-message .message-content i {
    background: #667eea;
    color: white;
}

.user-message .message-content i {
    background: #764ba2;
    color: white;
}

.message-content p {
    margin: 0;
    padding: 12px 16px;
    border-radius: 18px;
    background: #f0f2f5;
    color: #333;
    line-height: 1.4;
    word-wrap: break-word;
}

.user-message .message-content p {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
}

.message-time {
    font-size: 12px;
    color: #999;
    margin-top: 5px;
    align-self: flex-end;
}

.user-message .message-time {
    align-self: flex-start;
}

.chat-input-container {
    display: flex;
    gap: 10px;
    align-items: center;
}

#chatInput {
    flex: 1;
    padding: 12px 16px;
    border: 2px solid #e1e5e9;
    border-radius: 25px;
    font-size: 14px;
    outline: none;
    transition: border-color 0.3s ease;
}

#chatInput:focus {
    border-color: #667eea;
}

.chat-send-btn {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    border: none;
    width: 45px;
    height: 45px;
    border-radius: 50%;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.3s ease;
}

.chat-send-btn:hover {
    transform: scale(1.05);
    box-shadow: 0 4px 15px rgba(102, 126, 234, 0.3);
}

.chat-send-btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
    transform: none;
}

/* Chat animations */
@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

@keyframes slideUp {
    from { 
        opacity: 0;
        transform: translateY(30px);
    }
    to { 
        opacity: 1;
        transform: translateY(0);
    }
}

/* Responsive chat */
@media (max-width: 768px) {
    .chat-modal-content {
        width: 95%;
        max-height: 90vh;
    }
    
    .chat-body {
        height: 350px;
    }
    
    .chat-button {
        bottom: 20px;
        right: 20px;
        width: 55px;
        height: 55px;
        font-size: 20px;
    }
    
    .chat-tooltip {
        display: none;
    }
}

/* Additional mobile improvements */
@media (max-width: 768px) {
    /* Improve text readability */
    body {
        font-size: 16px;
        line-height: 1.6;
    }
    
    /* Better button spacing */
    .hero-buttons .btn {
        margin: 0.5rem 0;
    }
    
    /* Improve timeline readability */
    .timeline-content {
        margin-bottom: 1rem;
    }
    
    /* Better skill bar visibility */
    .skill-bar {
        height: 10px;
    }
    
    /* Improve project card spacing */
    .project-card {
        margin: 0 5px 1.5rem 5px;
    }
    
    /* Better contact method spacing */
    .contact-method {
        padding: 1.2rem;
        margin-bottom: 0.5rem;
    }
    
    /* Improve chat modal on mobile */
    .chat-modal {
        padding: 10px;
    }
    
    .chat-modal-content {
        border-radius: 10px;
    }
    
    .chat-header {
        padding: 15px;
    }
    
    .chat-close {
        width: 35px;
        height: 35px;
        font-size: 20px;
    }
}

/* Smooth scrolling for older browsers */
@media (prefers-reduced-motion: no-preference) {
    html {
        scroll-behavior: smooth;
    }
}