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

:root {
    --primary-color: #1e3a8a;
    --primary-light: #3b82f6;
    --text-dark: #1f2937;
    --text-light: #6b7280;
    --text-muted: #9ca3af;
    --bg-light: #f9fafb;
    --bg-blue: #eff6ff;
    --border-light: #e5e7eb;
    --white: #ffffff;
    --gray-50: #f9fafb;
    --gray-100: #f3f4f6;
    --gray-200: #e5e7eb;
    --gray-900: #111827;
}

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

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1rem;
}

/* Header */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    transition: all 0.3s ease;
    backdrop-filter: blur(10px);
}

.header.scrolled {
    background: rgba(255, 255, 255, 0.9);
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
}

.header .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem;
}

.logo {
    font-size: 1.25rem;
    font-weight: bold;
    color: var(--primary-color);
    text-decoration: none;
}

.nav {
    display: flex;
    gap: 2rem;
}

.nav-link {
    color: var(--text-dark);
    text-decoration: none;
    font-weight: 500;
    transition: color 0.3s ease;
}

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

.mobile-menu-btn {
    display: none;
    background: none;
    border: none;
    font-size: 1.5rem;
    color: var(--text-dark);
    cursor: pointer;
}

/* Hero Section */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(to bottom, var(--bg-blue), var(--white));
    position: relative;
    padding-top: 4rem;
}

.hero-content {
    text-align: center;
}

.profile-image {
    margin-bottom: 2rem;
}

.avatar {
    width: 9rem;
    height: 9rem;
    border-radius: 50%;
    background: #dbeafe;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2rem;
    font-weight: bold;
    color: var(--primary-color);
    margin: 0 auto;
    border: 4px solid var(--white);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
}

.hero h1 {
    font-size: 3rem;
    font-weight: bold;
    margin-bottom: 1rem;
    color: var(--text-dark);
}

.hero h2 {
    font-size: 1.5rem;
    color: var(--primary-color);
    margin-bottom: 1.5rem;
    font-weight: 500;
}

.hero p {
    font-size: 1.125rem;
    color: var(--text-light);
    max-width: 32rem;
    margin: 0 auto 2.5rem;
}

.hero-buttons {
    display: flex;
    gap: 1rem;
    justify-content: center;
    flex-wrap: wrap;
    margin-bottom: 4rem;
}

.btn {
    padding: 0.75rem 2rem;
    border-radius: 0.5rem;
    text-decoration: none;
    font-weight: 500;
    transition: all 0.3s ease;
    display: inline-block;
    border: 2px solid transparent;
}

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

.btn-primary:hover {
    background: var(--primary-light);
}

.btn-outline {
    border: 2px solid var(--border-light);
    color: var(--text-dark);
    background: var(--white);
}

.btn-outline:hover {
    background: var(--bg-light);
}

.btn-full {
    width: 100%;
}

.scroll-down {
    position: absolute;
    bottom: 2rem;
    left: 50%;
    transform: translateX(-50%);
    background: var(--white);
    color: var(--primary-color);
    width: 3rem;
    height: 3rem;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    text-decoration: none;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
    animation: bounce 2s infinite;
}

/* About Section */
.about {
    padding: 5rem 0;
    background: var(--white);
}

.about-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 3rem;
}

.about h2 {
    font-size: 2rem;
    font-weight: bold;
    margin-bottom: 1.5rem;
    color: var(--text-dark);
}

.about p {
    color: var(--text-light);
    margin-bottom: 1rem;
}

.interests h2 {
    font-size: 2rem;
    font-weight: bold;
    margin-bottom: 1.5rem;
    color: var(--text-dark);
}

.interests-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
}

.interest-card {
    background: var(--white);
    border: 1px solid #e0f2fe;
    border-radius: 0.5rem;
    padding: 1.5rem;
    display: flex;
    gap: 1rem;
}

.interest-icon {
    background: var(--bg-blue);
    padding: 0.75rem;
    border-radius: 0.5rem;
    flex-shrink: 0;
    align-content: center;
}

.interest-icon i {
    color: var(--primary-color);
    font-size: 1.5rem;
}

.interest-content h3 {
    font-size: 1.125rem;
    font-weight: 500;
    margin-bottom: 0.5rem;
}

.interest-content p {
    font-size: 0.875rem;
    color: var(--text-light);
}

/* Skills Section */
.skills {
    padding: 5rem 0;
    background: var(--bg-light);
}

.skills h2 {
    font-size: 2rem;
    font-weight: bold;
    text-align: center;
    margin-bottom: 1rem;
    color: var(--text-dark);
}

.section-subtitle {
    text-align: center;
    color: var(--text-light);
    max-width: 48rem;
    margin: 0 auto 3rem;
}

.skills-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 3rem;
    max-width: 80rem;
    margin: 0 auto;
}

.skills-category h3 {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--primary-color);
    margin-bottom: 1.5rem;
}

.skill-item {
    margin-bottom: 1.5rem;
}

.skill-header {
    display: flex;
    justify-content: space-between;
    margin-bottom: 0.5rem;
}

.skill-header span:first-child {
    font-weight: 500;
    color: var(--text-dark);
}

.skill-header span:last-child {
    color: var(--text-muted);
}

.progress-bar {
    width: 100%;
    height: 0.5rem;
    background: var(--gray-200);
    border-radius: 0.25rem;
    overflow: hidden;
}

.progress {
    height: 100%;
    background: var(--primary-color);
    border-radius: 0.25rem;
    transition: width 0.5s ease;
}

/* Education Section */
.education {
    padding: 5rem 0;
    background: var(--white);
}

.education h2 {
    font-size: 2rem;
    font-weight: bold;
    text-align: center;
    margin-bottom: 1rem;
    color: var(--text-dark);
}

.education-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 2rem;
    max-width: 80rem;
    margin: 0 auto;
}

.education-category h3 {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--text-dark);
    margin-bottom: 1.5rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.education-category h3 i {
    color: var(--primary-color);
}

.education-card, .certification-card {
    background: var(--white);
    border: 1px solid var(--border-light);
    border-radius: 0.5rem;
    padding: 1.5rem;
    margin-bottom: 1.5rem;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.05);
}

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

.education-header h4 {
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--text-dark);
}

.education-header p {
    color: var(--text-light);
    margin-bottom: 0;
}

.badge {
    background: var(--primary-color);
    color: var(--white);
    padding: 0.25rem 0.75rem;
    border-radius: 1rem;
    font-size: 0.875rem;
    font-weight: 500;
}

.tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin-top: 1rem;
}

.tag {
    background: var(--gray-100);
    color: var(--text-dark);
    padding: 0.25rem 0.75rem;
    border-radius: 1rem;
    font-size: 0.875rem;
    border: 1px solid var(--border-light);
}

.cert-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 0.5rem;
}

.cert-header h4 {
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--text-dark);
}

.cert-date {
    background: var(--gray-100);
    color: var(--text-light);
    padding: 0.25rem 0.75rem;
    border-radius: 1rem;
    font-size: 0.875rem;
    display: flex;
    align-items: center;
    gap: 0.25rem;
}

/* Projects Section */
.projects {
    padding: 5rem 0;
    background: var(--bg-light);
}

.projects h2 {
    font-size: 2rem;
    font-weight: bold;
    text-align: center;
    margin-bottom: 1rem;
    color: var(--text-dark);
}

.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
    gap: 1.5rem;
    max-width: 96rem;
    margin: 0 auto;
}

.project-card {
    background: var(--white);
    border: 1px solid #e0f2fe;
    border-radius: 0.5rem;
    padding: 1.5rem;
    display: flex;
    flex-direction: column;
    height: 100%;
}

.project-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 1rem;
    gap: 1rem;
}

.project-header h3 {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--text-dark);
}

.duration {
    background: var(--gray-100);
    color: var(--text-light);
    padding: 0.25rem 0.75rem;
    border-radius: 1rem;
    font-size: 0.875rem;
    display: flex;
    align-items: center;
    gap: 0.25rem;
    white-space: nowrap;
}

.project-card p {
    color: var(--text-light);
    margin-bottom: 1rem;
    flex-grow: 1;
}

.tech-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin-bottom: 1rem;
}

.tech-tag {
    background: var(--bg-blue);
    color: #1e40af;
    padding: 0.25rem 0.75rem;
    border-radius: 1rem;
    font-size: 0.875rem;
    font-weight: 500;
}

.view-details-btn {
    background: var(--white);
    border: 1px solid var(--border-light);
    color: var(--text-dark);
    padding: 0.75rem 1rem;
    border-radius: 0.375rem;
    cursor: pointer;
    font-weight: 500;
    transition: all 0.3s ease;
    width: 100%;
}

.view-details-btn:hover {
    background: var(--bg-light);
}

/* Contact Section */
.contact {
    padding: 5rem 0;
    background: var(--white);
}

.contact h2 {
    font-size: 2rem;
    font-weight: bold;
    text-align: center;
    margin-bottom: 1rem;
    color: var(--text-dark);
}

.contact-grid {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 2rem;
    max-width: 80rem;
    margin: 0 auto;
}

.contact-form-card {
    background: var(--white);
    border: 1px solid var(--border-light);
    border-radius: 0.5rem;
    padding: 1.5rem;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.05);
}

.contact-form-card h3 {
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
    color: var(--text-dark);
}

.contact-form-card p {
    color: var(--text-light);
    margin-bottom: 1.5rem;
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
}

.form-group {
    margin-bottom: 1rem;
}

.form-group label {
    display: block;
    font-weight: 500;
    margin-bottom: 0.5rem;
    color: var(--text-dark);
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 0.75rem;
    border: 1px solid var(--border-light);
    border-radius: 0.375rem;
    font-family: inherit;
    transition: border-color 0.3s ease;
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary-color);
}

.contact-info {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.contact-card {
    background: var(--white);
    border: 1px solid var(--border-light);
    border-radius: 0.5rem;
    padding: 1.5rem;
    display: flex;
    align-items: flex-start;
    gap: 1rem;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.05);
}

.contact-icon {
    background: var(--bg-blue);
    padding: 0.75rem;
    border-radius: 0.5rem;
    flex-shrink: 0;
}

.contact-icon i {
    color: var(--primary-color);
    font-size: 1.5rem;
}

.contact-card h4 {
    font-size: 1.125rem;
    font-weight: 500;
    margin-bottom: 0.25rem;
    color: var(--text-dark);
}

.contact-card a {
    color: var(--primary-color);
    text-decoration: none;
}

.contact-card a:hover {
    text-decoration: underline;
}

.contact-card p {
    color: var(--text-light);
    margin: 0;
}

.availability-note {
    background: var(--bg-blue);
    border: 1px solid #e0f2fe;
    border-radius: 0.5rem;
    padding: 1rem;
}

.availability-note p {
    color: var(--text-dark);
    font-size: 0.875rem;
    margin: 0;
}

/* Footer */
.footer {
    background: var(--gray-900);
    color: var(--white);
    padding: 3rem 0;
}

.footer-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 2rem;
}

.footer-info h3 {
    font-size: 1.25rem;
    font-weight: bold;
    margin-bottom: 0.25rem;
}

.footer-info p {
    color: var(--text-muted);
    margin-bottom: 0.75rem;
}

.domain-info {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--text-muted);
}

.domain-info a {
    color: var(--primary-light);
    text-decoration: none;
    font-size: 0.875rem;
    transition: color 0.3s ease;
}

.domain-info a:hover {
    color: var(--white);
}

.footer-social {
    display: flex;
    gap: 1.5rem;
}

.footer-social a {
    color: var(--white);
    text-decoration: none;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    transition: color 0.3s ease;
}

.footer-social a:hover {
    color: var(--primary-light);
}

.footer-social span {
    font-size: 0.875rem;
}

.footer-bottom {
    border-top: 1px solid #374151;
    padding-top: 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 1rem;
}

.footer-bottom p {
    color: var(--text-muted);
    font-size: 0.875rem;
    margin: 0;
}

.footer-nav {
    display: flex;
    gap: 1.5rem;
}

.footer-nav a {
    color: var(--text-muted);
    text-decoration: none;
    font-size: 0.875rem;
    transition: color 0.3s ease;
}

.footer-nav a:hover {
    color: var(--white);
}

/* Modal */
.modal {
    display: none;
    position: fixed;
    z-index: 2000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(4px);
}

.modal-content {
    background-color: var(--white);
    margin: 5% auto;
    padding: 2rem;
    border-radius: 0.5rem;
    width: 90%;
    max-width: 600px;
    max-height: 80vh;
    overflow-y: auto;
    position: relative;
    box-shadow: 0 25px 50px rgba(0, 0, 0, 0.25);
}

.close {
    position: absolute;
    top: 1rem;
    right: 1.5rem;
    color: var(--text-muted);
    font-size: 2rem;
    font-weight: bold;
    cursor: pointer;
    transition: color 0.3s ease;
}

.close:hover {
    color: var(--text-dark);
}

.modal h3 {
    color: var(--text-dark);
    margin-bottom: 0.5rem;
}

.modal .modal-duration {
    color: var(--primary-color);
    font-size: 0.875rem;
    margin-bottom: 1rem;
    display: flex;
    align-items: center;
    gap: 0.25rem;
}

.modal p {
    color: var(--text-light);
    margin-bottom: 1.5rem;
}

.modal h4 {
    color: var(--text-dark);
    font-weight: 500;
    margin-bottom: 0.5rem;
}

.modal-tech-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin-bottom: 1.5rem;
}

.modal-tech-tag {
    background: var(--gray-100);
    color: var(--text-dark);
    padding: 0.25rem 0.75rem;
    border-radius: 1rem;
    font-size: 0.875rem;
    border: 1px solid var(--border-light);
}

.modal ul {
    list-style: none;
    padding: 0;
}

.modal li {
    display: flex;
    align-items: flex-start;
    gap: 0.5rem;
    margin-bottom: 0.5rem;
}

.modal li i {
    color: #10b981;
    margin-top: 0.125rem;
    flex-shrink: 0;
}

/* Animations */
@keyframes bounce {
    0%, 20%, 50%, 80%, 100% {
        transform: translateX(-50%) translateY(0);
    }
    40% {
        transform: translateX(-50%) translateY(-10px);
    }
    60% {
        transform: translateX(-50%) translateY(-5px);
    }
}

/* Responsive Design */
@media (max-width: 768px) {
    .nav {
        display: none;
    }
    
    .mobile-menu-btn {
        display: block;
    }
    
    .nav.active {
        display: flex;
        position: fixed;
        top: 0;
        left: 0;
        right: 0;
        bottom: 0;
        background: var(--white);
        flex-direction: column;
        justify-content: center;
        align-items: center;
        gap: 2rem;
        z-index: 999;
    }
    
    .hero h1 {
        font-size: 2rem;
    }
    
    .hero h2 {
        font-size: 1.25rem;
    }
    
    .hero-buttons {
        flex-direction: column;
        align-items: center;
    }
    
    .about-grid {
        grid-template-columns: 1fr;
        gap: 2rem;
    }
    
    .interests-grid {
        grid-template-columns: 1fr;
    }
    
    .skills-grid {
        grid-template-columns: 1fr;
        gap: 2rem;
    }
    
    .education-grid {
        grid-template-columns: 1fr;
    }
    
    .projects-grid {
        grid-template-columns: 1fr;
    }
    
    .contact-grid {
        grid-template-columns: 1fr;
    }
    
    .form-row {
        grid-template-columns: 1fr;
    }
    
    .footer-content {
        flex-direction: column;
        gap: 1rem;
        text-align: center;
    }
    
    .footer-bottom {
        flex-direction: column;
        text-align: center;
    }
    
    .avatar {
        width: 6rem;
        height: 6rem;
        font-size: 1.5rem;
    }
    
    .modal-content {
        margin: 10% auto;
        padding: 1.5rem;
        width: 95%;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 0.75rem;
    }
    
    .hero {
        padding-top: 2rem;
    }
    
    .projects-grid {
        grid-template-columns: 1fr;
    }
    
    .project-card {
        min-width: unset;
    }
    
    .project-header {
        flex-direction: column;
        gap: 0.5rem;
    }
    
    .duration {
        align-self: flex-start;
    }
}

/* Smooth scrolling */
html {
    scroll-behavior: smooth;
}

/* Success message styles */
.success-message {
    background: #10b981;
    color: white;
    padding: 1rem;
    border-radius: 0.375rem;
    text-align: center;
    margin-top: 1rem;
    opacity: 0;
    transform: translateY(-10px);
    transition: all 0.3s ease;
}

.success-message.show {
    opacity: 1;
    transform: translateY(0);
}