/* Reset and Base Styles */
* {
    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: #000;
}

/* Color Variables */
:root {
    --primary-blue: #1652F0;
    --dark-blue: #0D1421;
    --navy-blue: #1A202C;
    --light-gray: #F7FAFC;
    --medium-gray: #E2E8F0;
    --text-gray: #64748B;
    --white: #FFFFFF;
    --success: #16A34A;
    --warning: #F59E0B;
    --error: #DC2626;
}

/* Header Styles */
.header {
    background: var(--dark-blue);
    color: var(--white);
    position: sticky;
    top: 0;
    z-index: 100;
}

.nav {
    display: flex;
    align-items: center;
    justify-content: space-between;
    max-width: 1200px;
    margin: 0 auto;
    padding: 16px 24px;
}

.nav-left {
    display: flex;
    align-items: center;
}

.logo {
    display: flex;
    align-items: center;
    gap: 8px;
}

.logo-text {
    font-size: 24px;
    font-weight: 700;
}

.pro-badge {
    background: var(--primary-blue);
    color: var(--white);
    padding: 4px 8px;
    border-radius: 4px;
    font-size: 12px;
    font-weight: 600;
}

.nav-center {
    display: flex;
    gap: 32px;
}

.nav-link {
    color: var(--white);
    text-decoration: none;
    font-weight: 500;
    transition: color 0.2s ease;
}

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

.nav-right {
    display: flex;
    align-items: center;
    gap: 16px;
}

.btn-primary {
    background: var(--primary-blue);
    color: var(--white);
    border: none;
    padding: 12px 24px;
    border-radius: 8px;
    font-weight: 600;
    cursor: pointer;
    transition: background 0.2s ease;
}

.btn-primary:hover {
    background: #0D47D1;
}

.secondary-nav {
    border-top: 1px solid #2D3748;
    padding: 8px 0;
}

.secondary-nav-content {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
    display: flex;
    gap: 32px;
}

.secondary-link {
    color: var(--medium-gray);
    text-decoration: none;
    font-size: 14px;
    font-weight: 500;
    transition: color 0.2s ease;
}

.secondary-link:hover {
    color: var(--white);
}

/* Hero Section */
.hero {
    background: linear-gradient(135deg, var(--dark-blue) 0%, var(--navy-blue) 100%);
    color: var(--white);
    padding: 80px 24px 120px;
    text-align: center;
}

.hero-content {
    max-width: 800px;
    margin: 0 auto;
}

.hero-title {
    font-size: 48px;
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: 24px;
}

.hero-subtitle {
    font-size: 18px;
    color: var(--medium-gray);
    margin-bottom: 40px;
    line-height: 1.5;
}

.btn-cta {
    background: var(--primary-blue);
    color: var(--white);
    border: none;
    padding: 16px 32px;
    border-radius: 8px;
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: background 0.2s ease;
    margin-bottom: 24px;
}

.btn-cta:hover {
    background: #0D47D1;
}

.institutional-link {
    font-size: 14px;
    color: var(--medium-gray);
}

.institutional-link a {
    color: var(--white);
    text-decoration: none;
}

/* Platform Preview */
.platform-preview {
    background: var(--dark-blue);
    padding: 0 24px 80px;
    margin-top: -60px;
}

.platform-container {
    max-width: 1000px;
    margin: 0 auto;
    position: relative;
}

.platform-image {
    position: relative;
    border-radius: 12px;
    overflow: hidden;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
}

.platform-image img {
    width: 100%;
    height: 400px;
    object-fit: cover;
}

.platform-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(45deg, rgba(22, 82, 240, 0.1), rgba(13, 20, 33, 0.3));
}

/* Features Section */
.features {
    background: var(--light-gray);
    padding: 80px 24px;
}

.features-container {
    max-width: 1200px;
    margin: 0 auto;
}

.features-title {
    text-align: center;
    font-size: 36px;
    font-weight: 700;
    margin-bottom: 64px;
    color: var(--dark-blue);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 40px;
}

.feature-card {
    background: var(--white);
    padding: 40px 32px;
    border-radius: 12px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.05);
    transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.feature-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 8px 30px rgba(0, 0, 0, 0.1);
}

.feature-icon {
    color: var(--primary-blue);
    margin-bottom: 24px;
}

.feature-title {
    font-size: 20px;
    font-weight: 600;
    margin-bottom: 16px;
    color: var(--dark-blue);
}

.feature-description {
    color: var(--text-gray);
    margin-bottom: 20px;
    line-height: 1.6;
}

.feature-link {
    color: var(--primary-blue);
    text-decoration: none;
    font-weight: 500;
    transition: color 0.2s ease;
}

.feature-link:hover {
    color: #0D47D1;
}

/* World Class Section */
.world-class {
    background: var(--dark-blue);
    color: var(--white);
    padding: 120px 24px;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.world-class-content {
    max-width: 800px;
    margin: 0 auto;
    position: relative;
    z-index: 2;
}

.world-class-title {
    font-size: 36px;
    font-weight: 700;
    margin-bottom: 24px;
}

.world-class-description {
    font-size: 18px;
    color: var(--medium-gray);
    line-height: 1.6;
}

.world-class-bg {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('https://images.pexels.com/photos/8370396/pexels-photo-8370396.jpeg?auto=compress&cs=tinysrgb&w=1200') center/cover;
    opacity: 0.1;
}

/* FAQ Section */
.faq {
    background: var(--white);
    padding: 80px 24px;
}

.faq-container {
    max-width: 800px;
    margin: 0 auto;
}

.faq-title {
    text-align: center;
    font-size: 36px;
    font-weight: 700;
    margin-bottom: 48px;
    color: var(--dark-blue);
}

.faq-list {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.faq-item {
    border: 1px solid var(--medium-gray);
    border-radius: 8px;
    overflow: hidden;
}

.faq-question {
    width: 100%;
    padding: 24px;
    background: var(--white);
    border: none;
    text-align: left;
    font-size: 16px;
    font-weight: 500;
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    transition: background 0.2s ease;
}

.faq-question:hover {
    background: var(--light-gray);
}

.faq-arrow {
    transition: transform 0.2s ease;
}

.faq-item.active .faq-arrow {
    transform: rotate(180deg);
}

.faq-answer {
    padding: 0 24px;
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease, padding 0.3s ease;
}

.faq-item.active .faq-answer {
    max-height: 200px;
    padding: 0 24px 24px;
}

.faq-answer p {
    color: var(--text-gray);
    line-height: 1.6;
}

/* CTA Section */
.cta {
    background: var(--dark-blue);
    color: var(--white);
    padding: 80px 24px;
    text-align: center;
}

.cta-content {
    max-width: 600px;
    margin: 0 auto;
}

.cta-title {
    font-size: 36px;
    font-weight: 700;
    margin-bottom: 32px;
}

/* Footer */
.footer {
    background: var(--dark-blue);
    color: var(--white);
    padding: 64px 24px 32px;
}

.footer-content {
    max-width: 1200px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 40px;
}

.footer-logo {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-bottom: 24px;
}

.footer-heading {
    font-size: 16px;
    font-weight: 600;
    margin-bottom: 16px;
}

.footer-links {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.footer-links a {
    color: var(--medium-gray);
    text-decoration: none;
    font-size: 14px;
    transition: color 0.2s ease;
}

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

/* Responsive Design */
@media (max-width: 768px) {
    .nav {
        flex-direction: column;
        gap: 16px;
    }
    
    .nav-center {
        order: 3;
        flex-wrap: wrap;
        justify-content: center;
    }
    
    .hero-title {
        font-size: 32px;
    }
    
    .features-grid {
        grid-template-columns: 1fr;
    }
    
    .world-class-title,
    .faq-title,
    .cta-title {
        font-size: 28px;
    }
    
    .footer-content {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 480px) {
    .nav-center {
        display: none;
    }
    
    .hero {
        padding: 40px 16px 60px;
    }
    
    .hero-title {
        font-size: 24px;
    }
    
    .features-container,
    .faq-container,
    .cta-content {
        padding: 0 16px;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
    }
}