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

:root {
    --primary-color: #1e3a8a;
    --secondary-color: #3b82f6;
    --accent-color: #f97316;
    --text-primary: #1f2937;
    --text-secondary: #6b7280;
    --bg-light: #f8fafc;
    --bg-white: #ffffff;
    --border-color: #e5e7eb;
    --gradient: linear-gradient(135deg, #1e3a8a 0%, #3b82f6 100%);
}

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

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

/* Header & Navigation */
.header {
    background: var(--bg-white);
    box-shadow: 0 2px 20px rgba(0,0,0,0.1);
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
}

.nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 0;
}

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

.nav-links {
    display: none;
    list-style: none;
}

.nav-links.active {
    display: flex;
    flex-direction: column;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--bg-white);
    box-shadow: 0 5px 20px rgba(0,0,0,0.1);
    padding: 2rem 1rem;
    gap: 1rem;
}

.nav-links li {
    margin: 0;
}

.nav-links a {
    color: var(--text-primary);
    text-decoration: none;
    font-weight: 500;
    transition: color 0.3s ease;
    padding: 0.5rem 1rem;
    border-radius: 5px;
}

.nav-links a:hover {
    color: var(--secondary-color);
    background-color: var(--bg-light);
}

.hamburger {
    display: flex;
    flex-direction: column;
    cursor: pointer;
    padding: 0.5rem;
}

.hamburger span {
    width: 25px;
    height: 3px;
    background: var(--primary-color);
    margin: 3px 0;
    transition: 0.3s;
    border-radius: 2px;
}

.hamburger.active span:nth-child(1) {
    transform: rotate(-45deg) translate(-5px, 6px);
}

.hamburger.active span:nth-child(2) {
    opacity: 0;
}

.hamburger.active span:nth-child(3) {
    transform: rotate(45deg) translate(-5px, -6px);
}

/* Hero Section */
.hero {
    background: var(--gradient);
    background-image: url('https://images.unsplash.com/photo-1565793298595-6a879b1d9492?ixlib=rb-4.0.3&ixid=M3wxMjA3fDB8MHxwaG90by1wYWdlfHx8fGVufDB8fHx8fA%3D%3D&auto=format&fit=crop&w=2071&q=80');
    background-size: cover;
    background-position: center;
    background-blend-mode: overlay;
    color: white;
    padding: 8rem 0 4rem;
    text-align: center;
    margin-top: 80px;
    position: relative;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: var(--gradient);
    opacity: 0.85;
    z-index: 1;
}

.hero .container {
    position: relative;
    z-index: 2;
}

.hero h1 {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 1rem;
    line-height: 1.2;
    text-shadow: 2px 2px 4px rgba(0,0,0,0.3);
}

.hero p {
    font-size: 1.2rem;
    margin-bottom: 2rem;
    opacity: 0.95;
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
    text-shadow: 1px 1px 2px rgba(0,0,0,0.3);
}

.cta-button {
    display: inline-block;
    background: var(--accent-color);
    color: white;
    padding: 1rem 2rem;
    border-radius: 50px;
    text-decoration: none;
    font-weight: 600;
    font-size: 1.1rem;
    transition: all 0.3s ease;
    box-shadow: 0 5px 20px rgba(249, 115, 22, 0.3);
}

.cta-button:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 30px rgba(249, 115, 22, 0.4);
}

/* Services Section */
.services {
    padding: 4rem 0;
    background: var(--bg-light);
}

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

.services-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 2rem;
    margin-top: 3rem;
}

.service-card {
    background: var(--bg-white);
    padding: 2rem;
    border-radius: 15px;
    box-shadow: 0 5px 30px rgba(0,0,0,0.1);
    text-align: center;
    transition: transform 0.3s ease;
}

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

.service-icon {
    font-size: 3rem;
    color: var(--secondary-color);
    margin-bottom: 1rem;
}

.service-card h3 {
    font-size: 1.3rem;
    font-weight: 600;
    margin-bottom: 1rem;
    color: var(--primary-color);
}

.service-card p {
    color: var(--text-secondary);
    line-height: 1.6;
}

/* About Section */
.about {
    padding: 4rem 0;
    background: var(--bg-white);
}

.about-content {
    max-width: 1000px;
    margin: 0 auto;
}

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

.about-text {
    flex: 1;
}

.about-image {
    flex-shrink: 0;
    text-align: center;
}

.about-image img {
    width: 250px;
    height: 250px;
    border-radius: 50%;
    object-fit: cover;
    border: 5px solid var(--secondary-color);
    box-shadow: 0 10px 30px rgba(0,0,0,0.2);
}

.about-content p {
    font-size: 1.1rem;
    line-height: 1.8;
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
    text-align: center;
}

.highlight {
    color: var(--primary-color);
    font-weight: 600;
}

/* Case Studies */
.case-studies {
    padding: 4rem 0;
    background: var(--bg-light);
}

.case-study {
    background: var(--bg-white);
    padding: 2rem;
    border-radius: 15px;
    margin-bottom: 2rem;
    box-shadow: 0 5px 30px rgba(0,0,0,0.1);
}

.case-study h3 {
    color: var(--primary-color);
    font-size: 1.3rem;
    margin-bottom: 1rem;
}

.case-study .challenge {
    color: var(--text-secondary);
    margin-bottom: 1rem;
}

.case-study .solution {
    margin-bottom: 1rem;
}

.case-study .result {
    color: var(--accent-color);
    font-weight: 600;
}

/* Publications */
.publications {
    padding: 4rem 0;
    background: var(--bg-white);
}

.publication-list {
    max-width: 800px;
    margin: 0 auto;
}

.publication-item {
    border-left: 4px solid var(--secondary-color);
    padding: 1rem 1.5rem;
    margin-bottom: 1rem;
    background: var(--bg-light);
    border-radius: 0 10px 10px 0;
}

.publication-item h4 {
    color: var(--primary-color);
    margin-bottom: 0.5rem;
}

.newsletter-signup {
    background: var(--gradient);
    color: white;
    padding: 2rem;
    border-radius: 15px;
    text-align: center;
    margin-top: 3rem;
}

.newsletter-form {
    display: flex;
    flex-direction: column;
    gap: 1rem;
    max-width: 400px;
    margin: 1rem auto 0;
}

.newsletter-form input {
    padding: 1rem;
    border: none;
    border-radius: 50px;
    font-size: 1rem;
}

.newsletter-form button {
    background: var(--accent-color);
    color: white;
    border: none;
    padding: 1rem;
    border-radius: 50px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
}

.newsletter-form button:hover {
    background: #ea580c;
}

/* Schedule Section */
.schedule-section {
    padding: 4rem 0;
    background: var(--bg-white);
}

/* Contact Form */
.contact-form-section {
    padding: 4rem 0;
    background: var(--bg-light);
}

.contact-form {
    max-width: 600px;
    margin: 0 auto;
    background: var(--bg-white);
    padding: 2rem;
    border-radius: 15px;
    box-shadow: 0 5px 30px rgba(0,0,0,0.1);
}

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

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

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

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

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

.honey-trap {
    position: absolute;
    left: -9999px;
    opacity: 0;
}

.submit-btn {
    background: var(--secondary-color);
    color: white;
    border: none;
    padding: 1rem 2rem;
    border-radius: 50px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    width: 100%;
}

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

/* Contact */
.contact {
    padding: 4rem 0;
    background: var(--primary-color);
    color: white;
    text-align: center;
}

.contact-info {
    margin-top: 2rem;
}

.contact-item {
    margin: 1rem 0;
    font-size: 1.1rem;
}

.contact-item i {
    margin-right: 0.5rem;
    color: var(--accent-color);
}

.social-links {
    margin-top: 2rem;
}

.social-links a {
    color: white;
    font-size: 1.5rem;
    margin: 0 1rem;
    transition: color 0.3s ease;
}

.social-links a:hover {
    color: var(--accent-color);
}

/* Footer */
.footer {
    background: #111827;
    color: white;
    padding: 2rem 0;
    text-align: center;
}

.footer-nav {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: 2rem;
    margin-bottom: 1rem;
}

.footer-nav a {
    color: #9ca3af;
    text-decoration: none;
    transition: color 0.3s ease;
}

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

/* Responsive Design */
@media (min-width: 768px) {
    .nav-links {
        display: flex;
        position: static;
        flex-direction: row;
        background: none;
        box-shadow: none;
        padding: 0;
        gap: 0;
    }

    .nav-links li {
        margin: 0 0 0 1rem;
    }

    .hamburger {
        display: none;
    }

    .hero h1 {
        font-size: 3.5rem;
    }

    .services-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .newsletter-form {
        flex-direction: row;
    }

    .about-flex {
        flex-direction: row;
        text-align: left;
    }

    .about-content p {
        text-align: left;
    }
}

@media (min-width: 1024px) {
    .services-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .hero h1 {
        font-size: 4rem;
    }

    .nav-links li {
        margin: 0 0 0 2rem;
    }
}

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

/* Utility classes */
.text-center {
    text-align: center;
}

.mt-2 {
    margin-top: 2rem;
}

/* Success/Error Messages */
.message {
    padding: 1rem;
    border-radius: 10px;
    margin-bottom: 1rem;
    text-align: center;
}

.message.success {
    background-color: #d1fae5;
    border: 1px solid #10b981;
    color: #065f46;
}

.message.error {
    background-color: #fee2e2;
    border: 1px solid #ef4444;
    color: #991b1b;
}