/* Base Styles */
:root {
    --primary-color: #2563eb;
    --primary-dark: #1d4ed8;
    --secondary-color: #10b981;
    --text-color: #1f2937;
    --text-light: #6b7280;
    --background-light: #f9fafb;
    --background-white: #ffffff;
    --accent-color: #8b5cf6;
    --border-color: #e5e7eb;
    --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --transition: all 0.3s ease;
}

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

html {
    scroll-behavior: smooth;
}

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

h1, h2, h3, h4, h5, h6 {
    font-family: 'Montserrat', sans-serif;
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: 1rem;
}

a {
    text-decoration: none;
    color: var(--primary-color);
    transition: var(--transition);
}

a:hover {
    color: var(--primary-dark);
}

.container {
    width: 90%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1rem;
}

.section-title {
    font-size: 2.5rem;
    text-align: center;
    margin-bottom: 0.5rem;
    color: var(--text-color);
}

.section-subtitle {
    font-size: 1.1rem;
    text-align: center;
    color: var(--text-light);
    margin-bottom: 3rem;
}

.btn {
    display: inline-block;
    padding: 0.8rem 1.5rem;
    border-radius: 0.5rem;
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition);
    font-size: 1rem;
}

.primary-btn {
    background-color: var(--primary-color);
    color: white;
    border: 2px solid var(--primary-color);
}

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

.secondary-btn {
    background-color: transparent;
    color: var(--primary-color);
    border: 2px solid var(--primary-color);
}

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

/* Navigation */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    background-color: rgba(255, 255, 255, 0.95);
    box-shadow: var(--shadow);
    z-index: 1000;
    padding: 1rem 0;
    transition: var(--transition);
}

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

.logo {
    display: flex;
    flex-direction: column;
    line-height: 1.2;
    text-decoration: none;
}

.logo-main {
    font-weight: 600;
    color: var(--text-color);
}

.logo-subtitle {
    font-size: 0.8em;
    color: var(--text-light);
}

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

.nav-links a {
    color: var(--text-color);
    font-weight: 500;
    position: relative;
}

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 2px;
    background-color: var(--primary-color);
    transition: var(--transition);
}

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

.mobile-menu-btn {
    display: none;
    flex-direction: column;
    gap: 6px;
    cursor: pointer;
}

.mobile-menu-btn span {
    display: block;
    width: 30px;
    height: 3px;
    background-color: var(--text-color);
    transition: var(--transition);
}

/* Hero Section */
.hero {
    padding: 8rem 0 5rem;
    background-color: var(--background-white);
    overflow: hidden;
}

.hero .container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 2rem;
}

.hero-content {
    flex: 1;
}

.hero-content h1 {
    font-size: 3.5rem;
    margin-bottom: 1.5rem;
    line-height: 1.2;
}

.hero-content h1 span {
    color: var(--primary-color);
    display: block;
}

.hero-content p {
    font-size: 1.2rem;
    color: var(--text-light);
    margin-bottom: 2rem;
    max-width: 600px;
}

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

.hero-image {
    flex: 1;
    display: flex;
    justify-content: center;
    align-items: center;
}

.hero-image img {
    max-width: 100%;
    animation: float 6s ease-in-out infinite;
}

@keyframes float {
    0% {
        transform: translateY(0px);
    }
    50% {
        transform: translateY(-20px);
    }
    100% {
        transform: translateY(0px);
    }
}

/* Specializations Section */
.specializations {
    padding: 5rem 0;
    background-color: var(--background-light);
}

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

.specialization-card {
    background-color: var(--background-white);
    border-radius: 1rem;
    padding: 2rem;
    box-shadow: var(--shadow);
    transition: var(--transition);
    position: relative;
    overflow: hidden;
    z-index: 1;
}

.specialization-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 0;
    background-color: rgba(37, 99, 235, 0.05);
    z-index: -1;
    transition: var(--transition);
}

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

.specialization-card:hover::before {
    height: 100%;
}

.card-icon {
    width: 70px;
    height: 70px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 1.5rem;
    font-size: 2rem;
}

#causal-inference .card-icon {
    background-color: rgba(37, 99, 235, 0.1);
    color: var(--primary-color);
}

#model-validation .card-icon {
    background-color: rgba(16, 185, 129, 0.1);
    color: var(--secondary-color);
}

#agritech .card-icon {
    background-color: rgba(139, 92, 246, 0.1);
    color: var(--accent-color);
}

.specialization-card h3 {
    font-size: 1.5rem;
    margin-bottom: 1rem;
}

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

.learn-more {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    font-weight: 500;
}

.learn-more i {
    transition: var(--transition);
}

.learn-more:hover i {
    transform: translateX(5px);
}

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

.about-content {
    max-width: 800px;
    margin: 0 auto;
    text-align: center;
}

.about-content .section-title {
    margin-bottom: 2rem;
}

.about-content p {
    margin-bottom: 1.5rem;
    color: var(--text-light);
    text-align: left;
}

.about-image {
    margin-top: 3rem;
    display: flex;
    justify-content: center;
}

.about-image img {
    width: 100%;
    max-width: 300px;
    border-radius: 50%;
    box-shadow: var(--shadow);
}

.training-info {
    margin-top: 2rem;
    padding-top: 1.5rem;
    border-top: 1px solid var(--border-color);
}

.training-info h3 {
    font-size: 1.3rem;
    margin-bottom: 0.8rem;
    color: var(--primary-color);
}

.training-info p {
    margin-bottom: 0;
}

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

.project-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
    gap: 2rem;
    margin-bottom: 3rem;
}

.project-card {
    background-color: var(--background-white);
    border-radius: 1rem;
    overflow: hidden;
    box-shadow: var(--shadow);
    transition: var(--transition);
}

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

.project-image {
    height: 200px;
    overflow: hidden;
}

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

.project-card:hover .project-image img {
    transform: scale(1.05);
}

.project-content {
    padding: 1.5rem;
}

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

.project-content p {
    color: var(--text-light);
    margin-bottom: 1rem;
    font-size: 0.9rem;
}

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

.project-tags span {
    background-color: rgba(37, 99, 235, 0.1);
    color: var(--primary-color);
    padding: 0.3rem 0.8rem;
    border-radius: 2rem;
    font-size: 0.8rem;
}

.view-all-projects {
    text-align: center;
}

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

.contact-container {
    display: flex;
    justify-content: center;
    margin-top: 2rem;
    margin-bottom: 3rem;
}

.contact-info {
    max-width: 600px;
    padding: 2rem;
    background-color: white;
    border-radius: 10px;
    box-shadow: 0 5px 15px rgba(0,0,0,0.1);
}

.contact-icon {
    font-size: 2.5rem;
    color: #4a6cf7;
    margin-bottom: 1rem;
}

.social-btn {
    display: inline-flex;
    align-items: center;
    background-color: #0077b5;
    color: white;
    padding: 0.75rem 1.5rem;
    border-radius: 50px;
    text-decoration: none;
    font-weight: 500;
    transition: all 0.3s ease;
}

.social-btn:hover {
    background-color: #005e93;
    transform: translateY(-3px);
    box-shadow: 0 5px 15px rgba(0,0,0,0.1);
}

.social-btn i {
    margin-right: 8px;
    font-size: 1.2rem;
}

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

.mt-4 {
    margin-top: 1.5rem;
}

/* Footer */
footer {
    background-color: #1f2937;
    color: white;
    padding: 3rem 0 1rem;
}

.footer-content {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    flex-wrap: wrap;
    gap: 2rem;
    margin-bottom: 3rem;
}

.footer-logo h3 {
    font-size: 1.5rem;
    margin-bottom: 0.5rem;
}

.footer-logo p {
    color: #d1d5db;
}

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

.footer-links a {
    color: #d1d5db;
}

.footer-links a:hover {
    color: white;
}

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

.footer-social a {
    color: #d1d5db;
    font-size: 1.2rem;
    transition: var(--transition);
}

.footer-social a:hover {
    color: white;
    transform: translateY(-3px);
}

.footer-bottom {
    text-align: center;
    padding-top: 2rem;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-bottom p {
    color: #9ca3af;
    font-size: 0.9rem;
}

/* Responsive Styles */
@media (max-width: 992px) {
    .hero-content h1 {
        font-size: 2.8rem;
    }
    
    .about .container {
        flex-direction: column-reverse;
    }
    
    .about-image {
        margin-bottom: 2rem;
    }
    
    .contact-container {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 768px) {
    .nav-links {
        position: fixed;
        top: 70px;
        left: 0;
        width: 100%;
        background-color: white;
        flex-direction: column;
        align-items: center;
        padding: 2rem 0;
        gap: 1.5rem;
        box-shadow: var(--shadow);
        transform: translateY(-150%);
        transition: var(--transition);
    }
    
    .nav-links.active {
        transform: translateY(0);
    }
    
    .mobile-menu-btn {
        display: flex;
    }
    
    .hero .container {
        flex-direction: column;
        text-align: center;
    }
    
    .hero-content h1 {
        font-size: 2.5rem;
    }
    
    .cta-buttons {
        justify-content: center;
    }
    
    .section-title {
        font-size: 2rem;
    }
    
    .project-grid {
        grid-template-columns: 1fr;
    }
    
    .contact-form {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 576px) {
    .hero-content h1 {
        font-size: 2rem;
    }
    
    .specialization-cards {
        grid-template-columns: 1fr;
    }
    
    .footer-content {
        flex-direction: column;
        align-items: center;
        text-align: center;
    }
    
    .footer-links {
        align-items: center;
    }
}

/* Services Section */
.services {
    padding: 5rem 0;
    background-color: var(--background-white);
}

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

.service-card {
    background-color: var(--background-light);
    border-radius: 1rem;
    padding: 2rem;
    box-shadow: var(--shadow);
    transition: var(--transition);
    position: relative;
    overflow: hidden;
    z-index: 1;
    text-align: center;
}

.service-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 0;
    background-color: rgba(37, 99, 235, 0.05);
    z-index: -1;
    transition: var(--transition);
}

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

.service-card:hover::before {
    height: 100%;
}

.service-icon {
    width: 70px;
    height: 70px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 1.5rem;
    font-size: 2rem;
    background-color: rgba(37, 99, 235, 0.1);
    color: var(--primary-color);
}

.service-card h3 {
    font-size: 1.5rem;
    margin-bottom: 1rem;
}

.service-card p {
    color: var(--text-light);
}

/* Language dropdown styles */
.language-dropdown {
    position: relative;
    display: inline-block;
    margin-left: 15px;
}

.language-btn {
    display: flex;
    align-items: center;
    gap: 5px;
    cursor: pointer;
    padding: 5px 10px;
    border-radius: 4px;
    transition: background-color 0.3s;
}

.language-btn:hover {
    background-color: rgba(255, 255, 255, 0.1);
}

.language-dropdown-content {
    display: none;
    position: absolute;
    right: 0;
    background-color: #fff;
    min-width: 160px;
    box-shadow: 0px 8px 16px 0px rgba(0,0,0,0.2);
    z-index: 1;
    border-radius: 4px;
    overflow: hidden;
}

.language-dropdown-content a {
    color: #333 !important;
    padding: 12px 16px;
    text-decoration: none;
    display: block;
    text-align: left;
}

.language-dropdown-content a:hover {
    background-color: #f1f1f1;
}

.language-dropdown-content a.active {
    background-color: #e0e0e0;
    font-weight: bold;
}

.language-dropdown:hover .language-dropdown-content {
    display: block;
}

/* For mobile responsiveness */
@media (max-width: 768px) {
    .language-dropdown {
        margin-top: 15px;
        margin-left: 0;
    }
    
    .language-dropdown-content {
        width: 100%;
        position: relative;
    }
}