:root {
    --primary-color: #2563eb;
    --text-color: #1f2937;
    --bg-color: #ffffff;
    --accent-color: #3b82f6;
    --gray-light: #f3f4f6;
    --gray-dark: #4b5563;
    --transition: all 0.3s ease;
}

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

body {
    font-family: 'Poppins', sans-serif;
    line-height: 1.6;
    color: var(--text-color);
    background-color: var(--bg-color);
}

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

/* Header & Navigation */
.header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    background-color: var(--bg-color);
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    z-index: 1000;
    transition: var(--transition);
}

.nav-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 80px;
    padding: 0 2rem;
}

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

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

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

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

.mobile-menu-btn {
    display: none;
    background: none;
    border: none;
    cursor: pointer;
}

/* Buttons */
.btn-primary {
    display: inline-block;
    padding: 0.8rem 1.5rem;
    width: 100%;
    background-color: var(--primary-color);
    color: white;
    text-decoration: none;
    border-radius: 0.5rem;
    transition: var(--transition);
}

.btn-primary:hover {
    background-color: var(--accent-color);
    transform: translateY(-2px);
}

.btn-secondary {
    display: inline-block;
    padding: 0.8rem 1.5rem;
    background-color: var(--accent-color);
    color: white;
    text-decoration: none;
    border-radius: 0.5rem;
    transition: var(--transition);
}

.btn-outline {
    display: inline-block;
    padding: 0.8rem 1.5rem;
    border: 2px solid var(--primary-color);
    color: var(--primary-color);
    text-decoration: none;
    border-radius: 0.5rem;
    transition: var(--transition);
}

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

/* Sections */
.section {
    padding: 8rem 0;
}

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

.section-subtitle {
    display: inline-block;
    font-size: 1rem;
    color: var(--primary-color);
    font-weight: 500;
    margin-bottom: 1rem;
    text-transform: uppercase;
    letter-spacing: 2px;
}

.section-title {
    font-size: 2.5rem;
    margin-bottom: 2rem;
    color: var(--text-color);
    line-height: 1.2;
}

.about-description {
    margin-bottom: 2.5rem;
}

.about-description p {
    margin-bottom: 1rem;
    color: var(--gray-dark);
}

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

.stat-item {
    text-align: center;
}

.stat-number {
    display: block;
    font-size: 2rem;
    font-weight: 700;
    color: var(--primary-color);
    margin-bottom: 0.5rem;
}

.stat-label {
    font-size: 0.9rem;
    color: var(--gray-dark);
}

.about-image {
    position: relative;
}

.profile-image {
    width: 100%;
    border-radius: 1rem;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
    position: relative;
    z-index: 2;
}

.image-decoration {
    position: absolute;
    width: 100%;
    height: 100%;
    border: 2px solid var(--primary-color);
    border-radius: 1rem;
    top: 20px;
    left: 20px;
    z-index: 1;
}

/* Projects Section */
.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin-top: 3rem;
}

.project-card {
    background-color: var(--bg-color);
    border-radius: 1rem;
    overflow: hidden;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
    transition: var(--transition);
}

.project-card:hover {
    transform: translateY(-10px);
}

.project-image {
    width: 100%;
    height: 250px;
    overflow: hidden;
}

.project-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: var(--transition);
}

.project-card:hover .project-image img {
    transform: scale(1.1);
}

.project-content {
    padding: 2rem;
}

.project-content h3 {
    font-size: 1.5rem;
    margin-bottom: 1rem;
    color: var(--text-color);
}

.project-content p {
    color: var(--gray-dark);
    margin-bottom: 1.5rem;
}

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

.project-tags span {
    background-color: var(--gray-light);
    color: var(--primary-color);
    padding: 0.4rem 0.8rem;
    border-radius: 2rem;
    font-size: 0.9rem;
}

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

/* Testimonials Section */
.testimonials {
    background-color: var(--gray-light);
}

.testimonials-slider {
    position: relative;
    max-width: 800px;
    margin: 3rem auto 0;
    overflow: hidden;
}

.testimonial-card {
    display: none;
    background-color: var(--bg-color);
    padding: 2rem;
    border-radius: 1rem;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
}

.testimonial-card.active {
    display: block;
    animation: fadeIn 0.5s ease-in-out;
}

.testimonial-content p {
    font-size: 1.1rem;
    color: var(--gray-dark);
    font-style: italic;
    margin-bottom: 1.5rem;
}

.testimonial-author {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.author-info h4 {
    font-size: 1.1rem;
    color: var(--text-color);
    margin-bottom: 0.2rem;
}

.author-info p {
    font-size: 0.9rem;
    color: var(--gray-dark);
}

.testimonial-controls {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 2rem;
    margin-top: 2rem;
}

.control-btn {
    background: none;
    border: none;
    font-size: 1.5rem;
    color: var(--primary-color);
    cursor: pointer;
    transition: var(--transition);
}

.control-btn:hover {
    color: var(--accent-color);
}

.testimonial-dots {
    display: flex;
    gap: 0.5rem;
}

.dot {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background-color: var(--gray-dark);
    border: none;
    cursor: pointer;
    transition: var(--transition);
}

.dot.active {
    background-color: var(--primary-color);
}

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

/* Footer */
.footer {
    background-color: var(--gray-light);
    padding: 3rem 0;
    margin-top: 4rem;
}

.footer-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 2rem;
}

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

.social-icon {
    width: 24px;
    height: 24px;
    background-size: contain;
    background-repeat: no-repeat;
}

/* Formation Section */
.formation {
    background-color: var(--gray-light);
}

.timeline {
    position: relative;
    max-width: 800px;
    margin: 3rem auto 0;
    padding: 2rem 0;
}

.timeline::before {
    content: '';
    position: absolute;
    width: 2px;
    height: 100%;
    background-color: var(--primary-color);
    left: 50%;
    transform: translateX(-50%);
    top: 0;
}

.timeline-item {
    position: relative;
    margin-bottom: 3rem;
    width: calc(50% - 2rem);
    margin-left: auto;
}

.timeline-item:nth-child(odd) {
    margin-right: auto;
    margin-left: 0;
}

.timeline-content {
    background-color: var(--bg-color);
    padding: 2rem;
    border-radius: 1rem;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
    position: relative;
    transition: var(--transition);
}

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

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

.timeline-item:nth-child(odd) .timeline-content::before {
    right: -3rem;
}

.timeline-item:nth-child(even) .timeline-content::before {
    left: -3rem;
}

.timeline-content h3 {
    color: var(--primary-color);
    font-size: 1.2rem;
    margin-bottom: 0.5rem;
}

.timeline-content h4 {
    font-size: 1.5rem;
    margin-bottom: 1rem;
    color: var(--text-color);
}

.timeline-content p {
    color: var(--gray-dark);
}

/* Experience Section */
.experience-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin-top: 3rem;
}

.experience-card {
    background-color: var(--bg-color);
    border-radius: 1rem;
    padding: 2rem;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

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

.experience-date {
    display: inline-block;
    background-color: var(--primary-color);
    color: white;
    padding: 0.5rem 1rem;
    border-radius: 2rem;
    font-size: 0.9rem;
    margin-bottom: 1rem;
}

.experience-card h3 {
    font-size: 1.5rem;
    margin-bottom: 1rem;
    color: var(--text-color);
}

.experience-description {
    color: var(--gray-dark);
    margin-bottom: 1.5rem;
}

.experience-details {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease-out;
}

.experience-details.show {
    max-height: 500px;
    margin-top: 1rem;
    padding-top: 1rem;
    border-top: 1px solid var(--gray-light);
}

.show-more {
    background: none;
    border: none;
    color: var(--primary-color);
    cursor: pointer;
    font-weight: 500;
    padding: 0;
    transition: var(--transition);
}

.show-more:hover {
    color: var(--accent-color);
}

/* Modal */
.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.8);
    z-index: 1100;
    overflow-y: auto;
}

.modal-content {
    position: relative;
    background-color: var(--bg-color);
    margin: 2rem auto;
    padding: 2rem;
    width: 90%;
    max-width: 800px;
    border-radius: 1rem;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.2);
}

.modal-close {
    position: absolute;
    top: 1rem;
    right: 1rem;
    font-size: 1.5rem;
    background: none;
    border: none;
    color: var(--gray-dark);
    cursor: pointer;
    transition: var(--transition);
}

.modal-close:hover {
    color: var(--primary-color);
    transform: rotate(90deg);
}

.modal-image {
    width: 100%;
    height: 300px;
    object-fit: cover;
    border-radius: 0.5rem;
    margin-bottom: 1.5rem;
}

.modal-title {
    font-size: 1.8rem;
    margin-bottom: 1rem;
    color: var(--text-color);
}

.modal-description {
    color: var(--gray-dark);
    margin-bottom: 1.5rem;
    line-height: 1.6;
}

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

.modal-tags span {
    background-color: var(--gray-light);
    color: var(--primary-color);
    padding: 0.4rem 0.8rem;
    border-radius: 2rem;
    font-size: 0.9rem;
}

.modal-link {
    display: inline-block;
    padding: 0.8rem 1.5rem;
    background-color: var(--primary-color);
    color: white;
    text-decoration: none;
    border-radius: 0.5rem;
    transition: var(--transition);
}

.modal-link:hover {
    background-color: var(--accent-color);
    transform: translateY(-2px);
}

/* Mobile Menu */
.mobile-menu-btn {
    display: none;
    flex-direction: column;
    justify-content: space-between;
    width: 30px;
    height: 21px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 0;
    z-index: 1000;
}

.mobile-menu-btn span {
    width: 100%;
    height: 3px;
    background-color: var(--primary-color);
    border-radius: 3px;
    transition: var(--transition);
}

/* Projects Section Update */
.project-card {
    position: relative;
    cursor: pointer;
    transition: var(--transition);
}

.project-card:hover {
    transform: translateY(-10px);
}

.project-content {
    padding: 1.5rem;
}

.project-content h3 {
    font-size: 1.5rem;
    margin-bottom: 1rem;
    color: var(--text-color);
}

.project-content p {
    color: var(--gray-dark);
    margin-bottom: 1.5rem;
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

/* Responsive Design Update */
@media (max-width: 768px) {
    .mobile-menu-btn {
        display: flex;
    }

    .nav-links {
        position: fixed;
        top: 80px;
        left: -100%;
        width: 100%;
        height: calc(100vh - 80px);
        background-color: var(--bg-color);
        flex-direction: column;
        align-items: center;
        padding: 2rem;
        transition: var(--transition);
        z-index: 900;
    }

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

    .nav-links li {
        margin: 1.5rem 0;
    }

    .mobile-menu-btn.active span:nth-child(1) {
        transform: translateY(9px) rotate(45deg);
    }

    .mobile-menu-btn.active span:nth-child(2) {
        opacity: 0;
    }

    .mobile-menu-btn.active span:nth-child(3) {
        transform: translateY(-9px) rotate(-45deg);
    }

    .about-content {
        grid-template-columns: 1fr;
        text-align: center;
    }

    .about-stats {
        justify-content: center;
    }

    .profile-image {
        max-width: 300px;
        margin: 0 auto;
    }

    .image-decoration {
        display: none;
    }

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

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

    .project-links {
        flex-direction: column;
    }

    .testimonial-controls {
        gap: 1rem;
    }

    .timeline::before {
        left: 1rem;
    }

    .timeline-item {
        width: calc(100% - 3rem);
        margin-left: 3rem;
    }

    .timeline-item:nth-child(odd) {
        margin-left: 3rem;
    }

    .timeline-content::before {
        left: -2.5rem !important;
    }

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