:root {
    --primary-color: #4F46E5;
    --primary-dark: #4338CA;
    --secondary-color: #10B981;
    --text-primary: #111827;
    --text-secondary: #6B7280;
    --bg-primary: #FFFFFF;
    --bg-secondary: #F9FAFB;
    --bg-dark: #1F2937;
    --border-color: #E5E7EB;
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1);
}

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

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    color: var(--text-primary);
    line-height: 1.6;
    background-color: var(--bg-primary);
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
}

.container-wide {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 24px;
}

/* Navigation */
.navbar {
    background-color: var(--bg-primary);
    box-shadow: var(--shadow-sm);
    position: sticky;
    top: 0;
    z-index: 1000;
    transition: box-shadow 0.3s ease;
}

.navbar.scrolled {
    box-shadow: var(--shadow-md);
}

.nav-container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 24px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 72px;
}

.nav-logo a {
    display: flex;
    align-items: center;
    gap: 12px;
    text-decoration: none;
    color: var(--text-primary);
    font-weight: 700;
    font-size: 24px;
    transition: color 0.3s ease;
}

.nav-logo svg {
    color: var(--primary-color);
}

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

.nav-menu {
    display: flex;
    align-items: center;
    gap: 32px;
    list-style: none;
}

.nav-menu li a {
    text-decoration: none;
    color: var(--text-secondary);
    font-weight: 500;
    font-size: 15px;
    transition: color 0.3s ease;
    padding: 8px 0;
}

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

.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    cursor: pointer;
}

.nav-toggle span {
    width: 25px;
    height: 3px;
    background-color: var(--text-primary);
    border-radius: 2px;
    transition: all 0.3s ease;
}

/* Buttons */
.btn-primary {
    background-color: var(--primary-color);
    color: white !important;
    padding: 10px 24px;
    border-radius: 8px;
    text-decoration: none;
    font-weight: 600;
    font-size: 15px;
    transition: all 0.3s ease;
    display: inline-block;
    border: none;
    cursor: pointer;
}

.btn-primary:hover {
    background-color: var(--primary-dark);
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

.btn-secondary {
    background-color: transparent;
    color: var(--primary-color);
    padding: 10px 24px;
    border-radius: 8px;
    text-decoration: none;
    font-weight: 600;
    font-size: 15px;
    transition: all 0.3s ease;
    display: inline-block;
    border: 2px solid var(--primary-color);
}

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

.btn-group {
    display: flex;
    gap: 16px;
    flex-wrap: wrap;
}

/* Hero Section */
.hero {
    padding: 80px 0;
    background: linear-gradient(135deg, #F9FAFB 0%, #F3F4F6 100%);
}

.hero-split {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 64px;
    align-items: center;
}

.hero-content h1 {
    font-size: 56px;
    font-weight: 700;
    line-height: 1.1;
    margin-bottom: 24px;
    color: var(--text-primary);
}

.hero-content .highlight {
    color: var(--primary-color);
}

.hero-content p {
    font-size: 20px;
    color: var(--text-secondary);
    margin-bottom: 32px;
    line-height: 1.7;
}

.hero-visual {
    position: relative;
    padding: 40px;
}

.hero-card {
    background: white;
    border-radius: 16px;
    padding: 32px;
    box-shadow: var(--shadow-xl);
    position: relative;
}

.upload-zone {
    border: 2px dashed var(--border-color);
    border-radius: 12px;
    padding: 48px 24px;
    text-align: center;
    transition: all 0.3s ease;
    background-color: var(--bg-secondary);
}

.upload-zone:hover {
    border-color: var(--primary-color);
    background-color: #EEF2FF;
}

.upload-icon {
    width: 64px;
    height: 64px;
    margin: 0 auto 16px;
    color: var(--primary-color);
}

/* Features Section */
.features {
    padding: 96px 0;
    background-color: var(--bg-primary);
}

.section-header {
    text-align: center;
    max-width: 768px;
    margin: 0 auto 64px;
}

.section-tag {
    color: var(--primary-color);
    font-weight: 600;
    font-size: 14px;
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-bottom: 12px;
}

.section-header h2 {
    font-size: 42px;
    font-weight: 700;
    margin-bottom: 16px;
    color: var(--text-primary);
}

.section-header p {
    font-size: 18px;
    color: var(--text-secondary);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 32px;
}

.feature-card {
    background: white;
    padding: 32px;
    border-radius: 12px;
    border: 1px solid var(--border-color);
    transition: all 0.3s ease;
}

.feature-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
    border-color: var(--primary-color);
}

.feature-icon {
    width: 48px;
    height: 48px;
    background-color: #EEF2FF;
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 20px;
    color: var(--primary-color);
}

.feature-card h3 {
    font-size: 22px;
    font-weight: 600;
    margin-bottom: 12px;
    color: var(--text-primary);
}

.feature-card p {
    color: var(--text-secondary);
    line-height: 1.7;
}

/* Stats Section */
.stats {
    padding: 80px 0;
    background-color: var(--bg-dark);
    color: white;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 48px;
    text-align: center;
}

.stat-item h3 {
    font-size: 48px;
    font-weight: 700;
    margin-bottom: 8px;
    color: var(--primary-color);
}

.stat-item p {
    font-size: 16px;
    color: #D1D5DB;
}

/* Testimonials Section */
.testimonials {
    padding: 96px 0;
    background-color: var(--bg-secondary);
}

.testimonials-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(340px, 1fr));
    gap: 32px;
    margin-top: 48px;
}

.testimonial-card {
    background: white;
    padding: 32px;
    border-radius: 12px;
    box-shadow: var(--shadow-md);
}

.testimonial-text {
    font-size: 16px;
    line-height: 1.7;
    color: var(--text-secondary);
    margin-bottom: 24px;
}

.testimonial-author {
    display: flex;
    align-items: center;
    gap: 16px;
}

.author-avatar {
    width: 48px;
    height: 48px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-weight: 600;
    font-size: 18px;
}

.author-info h4 {
    font-size: 16px;
    font-weight: 600;
    margin-bottom: 4px;
}

.author-info p {
    font-size: 14px;
    color: var(--text-secondary);
}

/* CTA Section */
.cta {
    padding: 96px 0;
    background: linear-gradient(135deg, var(--primary-color), var(--primary-dark));
    color: white;
    text-align: center;
}

.cta h2 {
    font-size: 42px;
    font-weight: 700;
    margin-bottom: 16px;
}

.cta p {
    font-size: 20px;
    margin-bottom: 32px;
    opacity: 0.9;
}

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

.cta .btn-primary:hover {
    background-color: var(--bg-secondary);
}

.cta .btn-secondary {
    border-color: white;
    color: white;
}

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

/* Security Page */
.security-hero {
    padding: 96px 0 48px;
    text-align: center;
    background: linear-gradient(135deg, #F9FAFB 0%, #F3F4F6 100%);
}

.security-hero h1 {
    font-size: 52px;
    font-weight: 700;
    margin-bottom: 20px;
}

.security-hero p {
    font-size: 20px;
    color: var(--text-secondary);
    max-width: 768px;
    margin: 0 auto;
}

.security-features {
    padding: 96px 0;
}

.security-feature {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 64px;
    align-items: center;
    margin-bottom: 80px;
}

.security-feature:nth-child(even) .security-feature-content {
    order: 2;
}

.security-feature:nth-child(even) .security-feature-visual {
    order: 1;
}

.security-feature-content h3 {
    font-size: 32px;
    font-weight: 700;
    margin-bottom: 16px;
}

.security-feature-content p {
    font-size: 18px;
    color: var(--text-secondary);
    margin-bottom: 24px;
    line-height: 1.7;
}

.security-feature-visual {
    background: linear-gradient(135deg, #EEF2FF 0%, #E0E7FF 100%);
    border-radius: 16px;
    padding: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 320px;
}

.security-icon-large {
    width: 120px;
    height: 120px;
    color: var(--primary-color);
}

.compliance-badges {
    padding: 64px 0;
    background-color: var(--bg-secondary);
    text-align: center;
}

.badges-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 32px;
    margin-top: 48px;
}

.badge-item {
    background: white;
    padding: 32px;
    border-radius: 12px;
    box-shadow: var(--shadow-sm);
}

.badge-item h4 {
    font-size: 18px;
    font-weight: 600;
    margin-top: 16px;
}

/* About Page */
.about-hero {
    padding: 96px 0 48px;
    background: linear-gradient(135deg, #F9FAFB 0%, #F3F4F6 100%);
}

.about-intro {
    max-width: 900px;
    margin: 0 auto;
    text-align: center;
}

.about-intro h1 {
    font-size: 52px;
    font-weight: 700;
    margin-bottom: 24px;
}

.about-intro p {
    font-size: 20px;
    color: var(--text-secondary);
    line-height: 1.7;
}

.mission {
    padding: 96px 0;
}

.mission-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 64px;
    align-items: center;
}

.mission-text h2 {
    font-size: 38px;
    font-weight: 700;
    margin-bottom: 20px;
}

.mission-text p {
    font-size: 18px;
    color: var(--text-secondary);
    line-height: 1.7;
    margin-bottom: 16px;
}

.values {
    padding: 96px 0;
    background-color: var(--bg-secondary);
}

.values-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 32px;
    margin-top: 48px;
}

.value-card {
    background: white;
    padding: 32px;
    border-radius: 12px;
    text-align: center;
}

.value-icon {
    width: 56px;
    height: 56px;
    background-color: #EEF2FF;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 20px;
    color: var(--primary-color);
}

.value-card h3 {
    font-size: 22px;
    font-weight: 600;
    margin-bottom: 12px;
}

.value-card p {
    color: var(--text-secondary);
    line-height: 1.7;
}

.team {
    padding: 96px 0;
}

/* Footer */
.footer {
    background-color: var(--bg-dark);
    color: white;
    padding: 64px 0 32px;
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: 48px;
    margin-bottom: 48px;
}

.footer-logo {
    display: flex;
    align-items: center;
    gap: 12px;
    font-weight: 700;
    font-size: 24px;
    margin-bottom: 16px;
}

.footer-logo svg {
    color: var(--primary-color);
}

.footer-description {
    color: #9CA3AF;
    line-height: 1.7;
}

.footer-col h4 {
    font-size: 16px;
    font-weight: 600;
    margin-bottom: 16px;
}

.footer-col ul {
    list-style: none;
}

.footer-col ul li {
    margin-bottom: 12px;
}

.footer-col ul li a {
    color: #9CA3AF;
    text-decoration: none;
    transition: color 0.3s ease;
}

.footer-col ul li a:hover {
    color: white;
}

.footer-bottom {
    padding-top: 32px;
    border-top: 1px solid #374151;
    text-align: center;
    color: #9CA3AF;
}

/* Responsive Design */
@media (max-width: 968px) {
    .nav-toggle {
        display: flex;
    }

    .nav-menu {
        position: absolute;
        top: 72px;
        left: 0;
        right: 0;
        background-color: white;
        flex-direction: column;
        align-items: flex-start;
        padding: 24px;
        box-shadow: var(--shadow-lg);
        max-height: 0;
        overflow: hidden;
        transition: max-height 0.3s ease;
    }

    .nav-menu.active {
        max-height: 400px;
    }

    .hero-split,
    .security-feature,
    .mission-content {
        grid-template-columns: 1fr;
        gap: 48px;
    }

    .security-feature:nth-child(even) .security-feature-content,
    .security-feature:nth-child(even) .security-feature-visual {
        order: initial;
    }

    .hero-content h1 {
        font-size: 42px;
    }

    .footer-grid {
        grid-template-columns: 1fr 1fr;
        gap: 32px;
    }
}

@media (max-width: 640px) {
    .hero-content h1 {
        font-size: 36px;
    }

    .hero-content p {
        font-size: 18px;
    }

    .section-header h2 {
        font-size: 32px;
    }

    .features-grid,
    .testimonials-grid,
    .values-grid {
        grid-template-columns: 1fr;
    }

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

    .stats-grid {
        grid-template-columns: 1fr;
        gap: 32px;
    }

    .about-intro h1,
    .security-hero h1 {
        font-size: 36px;
    }
}