/* 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: #333;
    background-color: #ffffff;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* Navigation */
.nav {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid #e5e7eb;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 70px;
}

.nav-logo {
    display: flex;
    align-items: center;
    gap: 12px;
}

.nav-icon {
    width: 32px;
    height: 32px;
    border-radius: 8px;
}

.nav-brand {
    font-size: 24px;
    font-weight: 700;
    color: #1f2937;
}

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

.nav-link {
    text-decoration: none;
    color: #6b7280;
    font-weight: 500;
    transition: color 0.2s ease;
}

.nav-link:hover {
    color: #1f2937;
}

/* Hero Section */
.hero {
    padding: 120px 0 80px;
    background: linear-gradient(135deg, #f8fafc 0%, #e2e8f0 100%);
    min-height: 100vh;
    display: flex;
    align-items: center;
}

.hero-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}

.hero-title {
    font-size: 48px;
    font-weight: 700;
    color: #1f2937;
    line-height: 1.2;
    margin-bottom: 24px;
}

.hero-subtitle {
    font-size: 20px;
    color: #6b7280;
    line-height: 1.6;
    margin-bottom: 40px;
}

.hero-cta {
    display: flex;
    gap: 20px;
    flex-wrap: wrap;
}

.btn {
    display: inline-block;
    padding: 16px 32px;
    border-radius: 12px;
    text-decoration: none;
    font-weight: 600;
    font-size: 16px;
    transition: all 0.2s ease;
    border: none;
    cursor: pointer;
}

.btn-primary {
    background: #1f2937;
    color: white;
}

.btn-primary:hover {
    background: #374151;
    transform: translateY(-2px);
}

.btn-secondary {
    background: transparent;
    color: #1f2937;
    border: 2px solid #1f2937;
}

.btn-secondary:hover {
    background: #1f2937;
    color: white;
    transform: translateY(-2px);
}

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

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

.hero-logo {
    width: 120px;
    height: 120px;
    border-radius: 24px;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.1);
}

/* Problem Section */
.problem {
    padding: 100px 0;
    background: white;
}

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

.problem-text {
    font-size: 20px;
    color: #4b5563;
    line-height: 1.8;
    margin-bottom: 24px;
}

.problem-text-secondary {
    font-size: 18px;
    color: #1f2937;
    line-height: 1.8;
    font-weight: 500;
    padding: 32px;
    background: #f8fafc;
    border-left: 4px solid #1f2937;
    border-radius: 8px;
}

/* Features Section */
.features {
    padding: 100px 0;
    background: #f8fafc;
}

.section-title {
    font-size: 36px;
    font-weight: 700;
    color: #1f2937;
    text-align: center;
    margin-bottom: 24px;
}

.section-subtitle {
    font-size: 20px;
    color: #4b5563;
    text-align: center;
    max-width: 800px;
    margin: 0 auto 60px;
    line-height: 1.6;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 40px;
}

.feature-card {
    background: white;
    padding: 40px 30px;
    border-radius: 16px;
    border: 1px solid #e5e7eb;
    transition: all 0.2s ease;
}

.feature-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.08);
    border-color: #d1d5db;
}

.feature-title {
    font-size: 24px;
    font-weight: 600;
    color: #1f2937;
    margin-bottom: 16px;
}

.feature-description {
    color: #6b7280;
    line-height: 1.6;
}

/* Security Section */
.security {
    padding: 100px 0;
    background: white;
}

.security-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}

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

.security-description {
    font-size: 18px;
    color: #6b7280;
    margin-bottom: 32px;
    line-height: 1.6;
}

.security-description-center {
    font-size: 20px;
    color: #4b5563;
    margin-bottom: 24px;
    line-height: 1.8;
}

.security-features {
    list-style: disc;
    font-size: 16px;
    color: #4b5563;
    padding-left: 20px;
    line-height: 1.8;
}

.security-features li {
    margin-bottom: 16px;
}

.security-visual {
    display: flex;
    justify-content: center;
}

.security-diagram {
    background: white;
    padding: 40px;
    border-radius: 16px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
    border: 1px solid #e5e7eb;
}

.diagram-title {
    font-size: 20px;
    font-weight: 600;
    color: #1f2937;
    text-align: center;
    margin-bottom: 24px;
}

.diagram-layers {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.layer {
    background: #f3f4f6;
    padding: 16px 20px;
    border-radius: 8px;
    text-align: center;
    font-weight: 500;
    color: #374151;
    border: 1px solid #d1d5db;
}

/* Contact Section */
.contact {
    padding: 100px 0;
    background: #f8fafc;
}

.contact-subtitle {
    font-size: 18px;
    color: #6b7280;
    text-align: center;
    margin-bottom: 60px;
}

.contact-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    max-width: 800px;
    margin: 0 auto;
}

.contact-info h3 {
    font-size: 24px;
    font-weight: 600;
    color: #1f2937;
    margin-bottom: 24px;
}

.contact-item {
    margin-bottom: 16px;
    font-size: 16px;
    color: #374151;
}

.contact-item a {
    color: #1f2937;
    text-decoration: none;
}

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

.contact-form {
    background: #f8fafc;
    padding: 40px;
    border-radius: 16px;
    border: 1px solid #e5e7eb;
}

.form-group {
    margin-bottom: 24px;
}

.form-group label {
    display: block;
    font-weight: 500;
    color: #374151;
    margin-bottom: 8px;
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 12px 16px;
    border: 1px solid #d1d5db;
    border-radius: 8px;
    font-size: 16px;
    transition: border-color 0.2s ease;
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: #1f2937;
}

.form-group textarea {
    resize: vertical;
    min-height: 100px;
}

/* Footer */
.footer {
    background: #1f2937;
    color: white;
    padding: 40px 0 20px;
}

.footer-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
}

.footer-logo {
    display: flex;
    align-items: center;
    gap: 12px;
}

.footer-icon {
    width: 24px;
    height: 24px;
    border-radius: 6px;
}

.footer-brand {
    font-size: 20px;
    font-weight: 600;
}

.footer-links {
    display: flex;
    gap: 24px;
}

.footer-link {
    color: #d1d5db;
    text-decoration: none;
    transition: color 0.2s ease;
}

.footer-link:hover {
    color: white;
}

.footer-bottom {
    text-align: center;
    padding-top: 20px;
    border-top: 1px solid #374151;
    color: #9ca3af;
}

/* Responsive Design */
@media (max-width: 768px) {
    .hero-container {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .hero-title {
        font-size: 36px;
    }
    
    .hero-subtitle {
        font-size: 18px;
    }
    
    .nav-links {
        display: none;
    }
    
    .problem-content {
        text-align: left;
    }
    
    .problem-text-secondary {
        padding: 24px;
        font-size: 16px;
    }
    
    .security-content {
        grid-template-columns: 1fr;
    }
    
    .security-content-single {
        text-align: left;
    }
    
    .security-description-center {
        font-size: 18px;
    }
    
    .contact-content {
        grid-template-columns: 1fr;
    }
    
    .footer-content {
        flex-direction: column;
        gap: 20px;
        text-align: center;
    }
}

@media (max-width: 480px) {
    .hero-title {
        font-size: 28px;
    }
    
    .section-title {
        font-size: 28px;
    }
    
    .btn {
        padding: 12px 24px;
        font-size: 14px;
    }
    
    .hero-cta {
        flex-direction: column;
        align-items: center;
    }
}