/* Reset and Base Styles */
:root {
    --primary-color: #6366f1;
    --secondary-color: #a855f7;
    --text-primary: #1e293b;
    --text-secondary: #64748b;
    --bg-primary: #ffffff;
    --bg-secondary: #f8fafc;
    --border-color: #e2e8f0;
    --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
    --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1);
    --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1);
    --shadow-xl: 0 20px 25px -5px rgb(0 0 0 / 0.1);
    --transition: all 0.3s ease;
}

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

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

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

.section {
    padding: 5rem 0;
}

.section-title {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 3rem;
    text-align: center;
    position: relative;
}

.section-title::after {
    content: '';
    display: block;
    width: 60px;
    height: 4px;
    background: linear-gradient(to right, var(--primary-color), var(--secondary-color));
    margin: 1rem auto 0;
    border-radius: 2px;
}

/* Navigation */
.nav {
    position: fixed;
    top: 0;
    width: 100%;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    box-shadow: var(--shadow-sm);
    z-index: 1000;
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 1rem 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.nav-logo {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary-color);
    text-decoration: none;
}

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

.nav-link {
    color: var(--text-primary);
    text-decoration: none;
    font-weight: 500;
    transition: var(--transition);
    position: relative;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--primary-color);
    transition: width 0.3s ease;
}

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

.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 4px;
    background: none;
    border: none;
    cursor: pointer;
}

.nav-toggle span {
    width: 25px;
    height: 3px;
    background: var(--primary-color);
    border-radius: 2px;
    transition: var(--transition);
}

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

.hero-background {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    opacity: 0.9;
    z-index: -2;
}

.hero-background::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: 
        linear-gradient(90deg, rgba(255,255,255,.05) 1px, transparent 1px),
        linear-gradient(rgba(255,255,255,.05) 1px, transparent 1px);
    background-size: 50px 50px;
    animation: gridMove 20s linear infinite;
}

@keyframes gridMove {
    0% { transform: translate(0, 0); }
    100% { transform: translate(50px, 50px); }
}

.hero-content {
    text-align: center;
    color: white;
    z-index: 1;
    max-width: 800px;
}

.hero-title {
    font-size: 4rem;
    font-weight: 700;
    margin-bottom: 1rem;
    animation: fadeInUp 0.8s ease;
}

.hero-subtitle {
    font-size: 1.75rem;
    font-weight: 500;
    margin-bottom: 1.5rem;
    opacity: 0.9;
    animation: fadeInUp 0.8s ease 0.2s both;
}

.hero-description {
    font-size: 1.125rem;
    line-height: 1.8;
    margin-bottom: 2rem;
    opacity: 0.85;
    animation: fadeInUp 0.8s ease 0.4s both;
}

.hero-cta {
    display: flex;
    gap: 1rem;
    justify-content: center;
    animation: fadeInUp 0.8s ease 0.6s both;
}

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

/* Buttons */
.btn {
    display: inline-block;
    padding: 0.875rem 2rem;
    border-radius: 8px;
    font-weight: 600;
    text-decoration: none;
    transition: var(--transition);
    cursor: pointer;
    border: none;
}

.btn-primary {
    background: white;
    color: var(--primary-color);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.btn-secondary {
    background: transparent;
    color: white;
    border: 2px solid white;
}

.btn-secondary:hover {
    background: white;
    color: var(--primary-color);
}

/* About Section */
.about {
    background: var(--bg-secondary);
}

.about-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 3rem;
}

.about-image {
    order: -1;
}

.image-placeholder {
    width: 220px;
    height: 220px;
    border-radius: 50%;
    border: 5px solid var(--primary-color);
    overflow: hidden;
    box-shadow: var(--shadow-xl);
}

.image-placeholder svg {
    width: 100%;
    height: 100%;
    display: block;
}

.about-text {
    max-width: 800px;
}

.about-text p {
    font-size: 1.125rem;
    line-height: 1.8;
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
}

.skills {
    margin-top: 2rem;
}

.skills h3 {
    font-size: 1.25rem;
    color: var(--text-primary);
    margin-bottom: 1rem;
}

.skills-grid {
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem;
}

.filter-hint {
    font-size: 0.75rem;
    font-weight: 400;
    color: var(--text-secondary);
    font-style: italic;
}

.skill-tag {
    background: white;
    padding: 0.5rem 1rem;
    border-radius: 20px;
    font-size: 0.875rem;
    color: var(--primary-color);
    border: 2px solid var(--primary-color);
    font-weight: 500;
    transition: var(--transition);
}

.skill-tag[data-skill] {
    cursor: pointer;
}

.skill-tag[data-skill]:hover {
    background: var(--primary-color);
    color: white;
    transform: translateY(-2px);
}

.skill-tag.active {
    background: var(--primary-color);
    color: white;
    box-shadow: var(--shadow-md);
}

/* Projects Section */
.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 2rem;
}

.filter-active-banner {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: white;
    padding: 1rem 1.5rem;
    border-radius: 8px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 2rem;
    display: none;
}

.filter-active-banner.show {
    display: flex;
}

.clear-filter-btn {
    background: white;
    color: var(--primary-color);
    border: none;
    padding: 0.5rem 1rem;
    border-radius: 6px;
    cursor: pointer;
    font-weight: 600;
    transition: var(--transition);
}

.clear-filter-btn:hover {
    transform: scale(1.05);
    box-shadow: var(--shadow-md);
}

.project-card {
    background: white;
    padding: 2rem;
    border-radius: 12px;
    box-shadow: var(--shadow-md);
    transition: all 0.4s ease;
    border: 1px solid var(--border-color);
}

.project-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-xl);
}

.project-card.filtered-out {
    display: none;
}

.project-icon {
    font-size: 2.5rem;
    color: var(--primary-color);
    margin-bottom: 1rem;
}

.project-title {
    font-size: 1.5rem;
    color: var(--text-primary);
    margin-bottom: 1rem;
}

.project-description {
    color: var(--text-secondary);
    line-height: 1.6;
    margin-bottom: 1.5rem;
}

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

.tag {
    background: var(--bg-secondary);
    padding: 0.375rem 0.875rem;
    border-radius: 16px;
    font-size: 0.75rem;
    color: var(--primary-color);
    font-weight: 500;
}

/* Experience Section */
.experience {
    background: var(--bg-secondary);
}

.timeline {
    max-width: 900px;
    margin: 0 auto;
    position: relative;
}

.timeline::before {
    content: '';
    position: absolute;
    left: 30px;
    top: 0;
    bottom: 0;
    width: 2px;
    background: var(--border-color);
}

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

.timeline-marker {
    position: absolute;
    left: 22px;
    top: 0;
    width: 18px;
    height: 18px;
    border-radius: 50%;
    background: var(--primary-color);
    border: 3px solid white;
    box-shadow: var(--shadow-md);
}

.timeline-content {
    background: white;
    padding: 2rem;
    border-radius: 12px;
    box-shadow: var(--shadow-md);
    border: 1px solid var(--border-color);
}

.timeline-title {
    font-size: 1.5rem;
    color: var(--text-primary);
    margin-bottom: 0.5rem;
}

.timeline-company {
    font-size: 1.125rem;
    color: var(--primary-color);
    font-weight: 600;
    margin-bottom: 0.25rem;
}

.timeline-date {
    color: var(--text-secondary);
    font-size: 0.875rem;
    margin-bottom: 1rem;
}

.timeline-details {
    list-style: none;
    padding-left: 0;
}

.timeline-details li {
    position: relative;
    padding-left: 1.5rem;
    margin-bottom: 0.75rem;
    color: var(--text-secondary);
    line-height: 1.6;
}

.timeline-details li::before {
    content: '▸';
    position: absolute;
    left: 0;
    color: var(--primary-color);
    font-weight: bold;
}

/* Education Section */
.education-content {
    max-width: 600px;
    margin: 0 auto;
}

.education-card {
    background: white;
    padding: 3rem;
    border-radius: 12px;
    box-shadow: var(--shadow-lg);
    text-align: center;
    border: 1px solid var(--border-color);
    transition: var(--transition);
}

.education-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-xl);
}

.education-icon {
    font-size: 4rem;
    margin-bottom: 1.5rem;
}

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

.education-school {
    font-size: 1.25rem;
    color: var(--text-primary);
    font-weight: 600;
    margin-bottom: 0.5rem;
}

.education-location {
    color: var(--text-secondary);
    margin-bottom: 0.5rem;
}

.education-date {
    color: var(--text-secondary);
    margin-bottom: 1rem;
}

.education-honors {
    margin-top: 1rem;
}

.honors-badge {
    display: inline-block;
    color: var(--primary-color);
    font-weight: 700;
    font-style: italic;
    font-size: 1.125rem;
    border-bottom: 3px solid var(--primary-color);
    padding-bottom: 2px;
}

/* Testimonials Section */
.testimonials {
    background: linear-gradient(135deg, #f8f9ff 0%, #ffffff 100%);
}

.testimonials-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
    max-width: 1200px;
    margin: 0 auto;
}

.testimonial-card {
    background: white;
    padding: 2rem;
    border-radius: 12px;
    box-shadow: var(--shadow-md);
    border: 1px solid var(--border-color);
    transition: var(--transition);
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.testimonial-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-xl);
}

.testimonial-icon {
    font-size: 2rem;
    color: var(--primary-color);
    opacity: 0.3;
}

.testimonial-text {
    font-size: 1rem;
    line-height: 1.6;
    color: var(--text-primary);
    font-style: italic;
    flex: 1;
}

.testimonial-author {
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
    padding-top: 1rem;
    border-top: 2px solid var(--border-color);
}

.testimonial-author strong {
    color: var(--text-primary);
    font-size: 0.875rem;
    font-weight: 600;
}

.testimonial-author span {
    color: var(--text-secondary);
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

/* Contact Section */
.contact {
    background: var(--bg-secondary);
}

.contact-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    max-width: 1200px;
    margin: 0 auto;
}

.contact-left {
    display: flex;
    flex-direction: column;
    gap: 2rem;
    height: 100%;
}

.contact-text {
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.contact-text p {
    font-size: 1.125rem;
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
    line-height: 1.6;
}

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

.contact-link {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 1rem;
    background: white;
    border-radius: 8px;
    text-decoration: none;
    color: var(--text-primary);
    transition: var(--transition);
    border: 1px solid var(--border-color);
}

.contact-link:hover {
    background: var(--primary-color);
    color: white;
    transform: translateX(4px);
}

.contact-link:hover svg {
    color: white;
    stroke: white;
}

.contact-link svg {
    flex-shrink: 0;
}

/* Contact Cards */
.contact-cards {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
    flex: 1;
}

.contact-card {
    background: white;
    padding: 2rem;
    border-radius: 12px;
    box-shadow: var(--shadow-md);
    border: 1px solid var(--border-color);
    transition: var(--transition);
}

.contact-card:hover {
    box-shadow: var(--shadow-lg);
}

.contact-card h3 {
    font-size: 1.25rem;
    color: var(--text-primary);
    margin-bottom: 1.5rem;
    text-align: center;
}

/* Professional Card */
.professional-card {
    text-align: center;
}

.contact-card-photo {
    width: 120px;
    height: 120px;
    margin: 0 auto 1.5rem;
    border-radius: 50%;
    overflow: hidden;
    border: 3px solid var(--primary-color);
}

.contact-card-photo svg {
    width: 100%;
    height: 100%;
    display: block;
}

.contact-stats {
    display: flex;
    justify-content: space-around;
    gap: 1rem;
    margin-top: 1.5rem;
}

.stat-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.25rem;
}

.stat-item strong {
    font-size: 1.5rem;
    color: var(--primary-color);
    font-weight: 700;
}

.stat-item span {
    font-size: 0.875rem;
    color: var(--text-secondary);
    text-align: center;
}

/* Availability Card */
.availability-card {
    flex: 1;
    display: flex;
    flex-direction: column;
}

.availability-card h3 {
    font-size: 1.25rem;
    color: var(--text-primary);
    margin-bottom: 1rem;
}

.availability-list {
    list-style: none;
    padding: 0;
    margin: 0;
}

.availability-list li {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.75rem;
    margin-bottom: 0.5rem;
    border-radius: 8px;
    transition: var(--transition);
}

.availability-list li.available {
    background: #f0fdf4;
    color: #166534;
}

.availability-list li.unavailable {
    background: #f8fafc;
    color: #64748b;
}

.availability-list li i {
    font-size: 1.25rem;
}

.availability-list li.available i {
    color: #22c55e;
}

.availability-list li.unavailable i {
    color: #94a3b8;
}

/* Visual Card */
.visual-card {
    height: 100%;
    min-height: 280px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, #f8fafc 0%, #e0e7ff 100%);
    position: relative;
    overflow: hidden;
}

.decorative-pattern {
    width: 100%;
    height: 100%;
    position: relative;
}

.pattern-circle {
    position: absolute;
    border-radius: 50%;
    opacity: 0.3;
    animation: float 20s infinite ease-in-out;
}

.pattern-1 {
    width: 100px;
    height: 100px;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    top: 20%;
    left: 15%;
    animation-delay: 0s;
}

.pattern-2 {
    width: 80px;
    height: 80px;
    background: linear-gradient(135deg, var(--secondary-color), #ec4899);
    bottom: 25%;
    right: 20%;
    animation-delay: -5s;
}

.pattern-3 {
    width: 60px;
    height: 60px;
    background: linear-gradient(135deg, var(--primary-color), #3b82f6);
    top: 50%;
    right: 30%;
    animation-delay: -10s;
}

@keyframes float {
    0%, 100% {
        transform: translate(0, 0) scale(1);
    }
    33% {
        transform: translate(20px, -20px) scale(1.1);
    }
    66% {
        transform: translate(-20px, 20px) scale(0.9);
    }
}

/* Responsive Design */
@media (max-width: 768px) {
    .nav-menu {
        position: fixed;
        left: -100%;
        top: 70px;
        flex-direction: column;
        background-color: white;
        width: 100%;
        text-align: center;
        transition: 0.3s;
        box-shadow: var(--shadow-lg);
        padding: 2rem 0;
        gap: 0;
    }

    .nav-menu.active {
        left: 0;
    }

    .nav-menu li {
        padding: 1rem 0;
    }

    .nav-toggle {
        display: flex;
    }

    .about-content,
    .contact-content {
        grid-template-columns: 1fr;
        gap: 2rem;
    }

    .contact-cards {
        gap: 1rem;
    }

    .contact-card {
        padding: 1.5rem;
    }

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

    .hero-title {
        font-size: 2.5rem;
    }

    .hero-subtitle {
        font-size: 1.25rem;
    }

    .hero-cta {
        flex-direction: column;
        gap: 0.75rem;
    }

    .section {
        padding: 3rem 0;
    }

    .section-title {
        font-size: 2rem;
    }

    .timeline::before {
        left: 15px;
    }

    .timeline-item {
        padding-left: 45px;
    }

    .timeline-marker {
        left: 7px;
    }

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

    .container {
        padding: 0 1rem;
    }
}

@media (max-width: 480px) {
    .section {
        padding: 3rem 1rem;
    }

    .hero-title {
        font-size: 2rem;
    }

    .hero-subtitle {
        font-size: 1.25rem;
    }

    .section-title {
        font-size: 1.75rem;
    }

    .image-placeholder {
        width: 200px;
        height: 200px;
    }
}

/* Smooth Animations */
@media (prefers-reduced-motion: no-preference) {
    .project-card,
    .testimonial-card,
    .education-card,
    .timeline-content {
        animation: fadeIn 0.6s ease;
    }
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}