/* CSS Custom Properties */
:root {
    /* Colors */
    --primary-color: #2563eb;
    --primary-dark: #1e40af;
    --primary-light: #3b82f6;
    --secondary-color: #10b981;
    --accent-color: #f59e0b;
    --text-color: #1f2937;
    --text-light: #6b7280;
    --text-muted: #9ca3af;
    --background-color: #ffffff;
    --background-light: #f8fafc;
    --background-dark: #111827;
    --border-color: #e5e7eb;
    --border-light: #f3f4f6;
    
    /* Typography */
    --font-family-primary: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --font-family-secondary: 'Georgia', serif;
    --font-size-xs: 0.75rem;
    --font-size-sm: 0.875rem;
    --font-size-base: 1rem;
    --font-size-lg: 1.125rem;
    --font-size-xl: 1.25rem;
    --font-size-2xl: 1.5rem;
    --font-size-3xl: 1.875rem;
    --font-size-4xl: 2.25rem;
    --font-size-5xl: 3rem;
    --font-size-6xl: 3.75rem;
    --line-height-tight: 1.25;
    --line-height-normal: 1.5;
    --line-height-relaxed: 1.75;
    
    /* Spacing */
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-2xl: 3rem;
    --spacing-3xl: 4rem;
    --spacing-4xl: 6rem;
    
    /* Border radius */
    --border-radius-sm: 4px;
    --border-radius-md: 8px;
    --border-radius-lg: 12px;
    --border-radius-xl: 16px;
    --border-radius-2xl: 24px;
    
    /* Shadows */
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
    
    /* Transitions */
    --transition-fast: 0.15s ease;
    --transition-normal: 0.3s ease;
    --transition-slow: 0.5s ease;
    
    /* Z-index */
    --z-dropdown: 1000;
    --z-sticky: 1020;
    --z-fixed: 1030;
    --z-modal-backdrop: 1040;
    --z-modal: 1050;
    --z-popover: 1060;
    --z-tooltip: 1070;
}

/* Reset and base styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    font-size: 16px;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    line-height: 1.6;
    color: #2d3748;
    background-color: #ffffff;
    overflow-x: hidden;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
    font-weight: 600;
    line-height: 1.2;
    margin-bottom: 1rem;
    color: #1a202c;
}

h1 {
    font-size: 3.5rem;
    font-weight: 700;
}

h2 {
    font-size: 2.5rem;
    font-weight: 600;
}

h3 {
    font-size: 1.75rem;
    font-weight: 600;
}

h4 {
    font-size: var(--font-size-2xl);
}

h5 {
    font-size: var(--font-size-xl);
}

h6 {
    font-size: var(--font-size-lg);
}

p {
    margin-bottom: 1rem;
    color: #4a5568;
}

a {
    color: #3182ce;
    text-decoration: none;
    transition: color 0.3s ease;
}

a:hover {
    color: #2c5aa0;
}

/* Container */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
}

/* Skip link for accessibility */
.skip-link {
    position: absolute;
    top: -40px;
    left: 6px;
    background: var(--primary-color);
    color: white;
    padding: 8px;
    text-decoration: none;
    border-radius: var(--border-radius-md);
    z-index: var(--z-tooltip);
}

.skip-link:focus {
    top: 6px;
}

/* Navigation */
.navbar {
    position: fixed;
    top: 0;
    width: 100%;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid #e2e8f0;
    z-index: 1000;
    transition: all 0.3s ease;
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 70px;
}

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

.logo-link {
    display: flex;
    align-items: center;
    font-size: 1.5rem;
    font-weight: 700;
    color: #1a202c;
}

.logo-text {
    background: linear-gradient(135deg, #3182ce, #805ad5);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.nav-menu {
    display: flex;
    gap: 2rem;
    align-items: center;
}

.nav-link {
    color: #4a5568;
    font-weight: 500;
    padding: 0.5rem 1rem;
    border-radius: 8px;
    transition: all 0.3s ease;
}

.nav-link:hover {
    color: #3182ce;
    background-color: #ebf8ff;
}

.nav-link.active {
    color: #3182ce;
    background-color: #ebf8ff;
}

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

.bar {
    width: 25px;
    height: 3px;
    background-color: #4a5568;
    margin: 3px 0;
    transition: 0.3s;
    border-radius: 2px;
}

/* Hero Section */
.hero {
    padding: 120px 0 80px;
    background: linear-gradient(135deg, #f7fafc 0%, #edf2f7 100%);
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><defs><pattern id="grid" width="10" height="10" patternUnits="userSpaceOnUse"><path d="M 10 0 L 0 0 0 10" fill="none" stroke="%23e2e8f0" stroke-width="0.5"/></pattern></defs><rect width="100" height="100" fill="url(%23grid)"/></svg>');
    opacity: 0.3;
}

.hero-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
    position: relative;
    z-index: 1;
}

.hero-title {
    font-size: 3.5rem;
    font-weight: 700;
    line-height: 1.1;
    margin-bottom: 1.5rem;
    color: #1a202c;
}

.hero-title .highlight {
    background: linear-gradient(135deg, #3182ce, #805ad5);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-description {
    font-size: 1.25rem;
    color: #4a5568;
    margin-bottom: 2rem;
    line-height: 1.6;
}

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

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.75rem 1.5rem;
    border-radius: 8px;
    font-weight: 500;
    text-decoration: none;
    transition: all 0.3s ease;
    border: none;
    cursor: pointer;
    font-size: 1rem;
}

.btn-primary {
    background: linear-gradient(135deg, #3182ce, #2c5aa0);
    color: white;
    box-shadow: 0 4px 15px rgba(49, 130, 206, 0.3);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(49, 130, 206, 0.4);
    color: white;
}

.btn-secondary {
    background: white;
    color: #3182ce;
    border: 2px solid #3182ce;
}

.btn-secondary:hover {
    background: #3182ce;
    color: white;
    transform: translateY(-2px);
}

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

.hero-image-container {
    position: relative;
    width: 400px;
    height: 400px;
}

.floating-card {
    position: absolute;
    background: white;
    padding: 1.5rem;
    border-radius: 16px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
    border: 1px solid #e2e8f0;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.5rem;
    animation: float 6s ease-in-out infinite;
}

.floating-card.card-1 {
    top: 20%;
    left: 10%;
    animation-delay: 0s;
}

.floating-card.card-2 {
    top: 50%;
    right: 10%;
    animation-delay: 2s;
}

.floating-card.card-3 {
    bottom: 20%;
    left: 20%;
    animation-delay: 4s;
}

.card-icon {
    font-size: 2rem;
}

.card-text {
    font-weight: 600;
    color: #2d3748;
    font-size: 0.9rem;
}

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

/* Section Styles */
.section-header {
    text-align: center;
    margin-bottom: 4rem;
}

.section-title {
    font-size: 2.5rem;
    font-weight: 600;
    color: #1a202c;
    margin-bottom: 1rem;
}

.section-description {
    font-size: 1.25rem;
    color: #4a5568;
    max-width: 600px;
    margin: 0 auto;
}

/* Features Section */
.features {
    padding: 80px 0;
    background: white;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 2rem;
}

.feature-card {
    background: white;
    padding: 2rem;
    border-radius: 16px;
    border: 1px solid #e2e8f0;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.05);
    transition: all 0.3s ease;
    text-align: center;
}

.feature-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.1);
    border-color: #3182ce;
}

.feature-icon {
    margin-bottom: 1.5rem;
}

.feature-icon .icon {
    font-size: 3rem;
    display: block;
}

.feature-title {
    font-size: 1.5rem;
    font-weight: 600;
    color: #1a202c;
    margin-bottom: 1rem;
}

.feature-description {
    color: #4a5568;
    line-height: 1.6;
}

/* About Section */
.about {
    padding: 80px 0;
    background: #f7fafc;
}

.about-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
}

.about-description {
    font-size: 1.1rem;
    color: #4a5568;
    line-height: 1.7;
    margin-bottom: 1.5rem;
}

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

.code-preview {
    background: #1a202c;
    border-radius: 12px;
    overflow: hidden;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
    max-width: 400px;
}

.code-header {
    background: #2d3748;
    padding: 0.75rem 1rem;
    display: flex;
    gap: 0.5rem;
    align-items: center;
}

.code-dot {
    width: 12px;
    height: 12px;
    border-radius: 50%;
}

.code-dot.red { background: #f56565; }
.code-dot.yellow { background: #ed8936; }
.code-dot.green { background: #48bb78; }

.code-content {
    padding: 1.5rem;
}

.code-content pre {
    margin: 0;
    color: #2d3748;
    font-family: 'Monaco', 'Menlo', 'Ubuntu Mono', monospace;
    font-size: 0.9rem;
    line-height: 1.5;
}

.code-content code {
    color: #3182ce;
}

/* Technology Section */
.technology {
    padding: 80px 0;
    background: white;
}

.tech-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
}

.tech-card {
    background: white;
    padding: 2rem;
    border-radius: 16px;
    border: 1px solid #e2e8f0;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.05);
    transition: all 0.3s ease;
    text-align: center;
}

.tech-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.1);
    border-color: #3182ce;
}

.tech-icon {
    font-size: 3rem;
    margin-bottom: 1rem;
    display: block;
}

.tech-title {
    font-size: 1.25rem;
    font-weight: 600;
    color: #1a202c;
    margin-bottom: 0.5rem;
}

.tech-description {
    color: #4a5568;
    font-size: 0.9rem;
}

/* Page Header (for policy pages) */
.page-header {
    background: linear-gradient(135deg, #f7fafc 0%, #edf2f7 100%);
    padding: 120px 0 60px;
    text-align: center;
    position: relative;
}

.page-header::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><defs><pattern id="grid" width="10" height="10" patternUnits="userSpaceOnUse"><path d="M 10 0 L 0 0 0 10" fill="none" stroke="%23e2e8f0" stroke-width="0.5"/></pattern></defs><rect width="100" height="100" fill="url(%23grid)"/></svg>');
    opacity: 0.3;
}

.page-header .container {
    position: relative;
    z-index: 1;
}

.page-title {
    font-size: 3rem;
    font-weight: 700;
    color: #1a202c;
    margin-bottom: 1rem;
}

.page-subtitle {
    font-size: 1.25rem;
    color: #4a5568;
    margin-bottom: 2rem;
}

/* Policy Content */
.policy-content {
    padding: 80px 0;
    background: #f7fafc;
}

.policy-wrapper {
    max-width: 800px;
    margin: 0 auto;
    background: white;
    border-radius: 16px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
    overflow: hidden;
}

.policy-section {
    padding: 2rem;
    border-bottom: 1px solid #e2e8f0;
}

.policy-section:last-child {
    border-bottom: none;
}

.policy-section h2 {
    color: #3182ce;
    font-size: 1.75rem;
    margin-bottom: 1.5rem;
    font-weight: 600;
}

.policy-section h3 {
    color: #1a202c;
    font-size: 1.25rem;
    margin: 1.5rem 0 1rem;
    font-weight: 600;
}

.policy-section p {
    color: #4a5568;
    line-height: 1.7;
    margin-bottom: 1rem;
}

.policy-section ul {
    margin: 1rem 0;
    padding-left: 1.5rem;
}

.policy-section li {
    color: #4a5568;
    margin-bottom: 0.5rem;
    line-height: 1.6;
}

.contact-info-card {
    background: #f7fafc;
    border-radius: 12px;
    padding: 1.5rem;
    margin-top: 1.5rem;
    border: 1px solid #e2e8f0;
}

.contact-info-card p {
    margin-bottom: 0.5rem;
}

.contact-info-card strong {
    color: #1a202c;
}

/* Breadcrumb */
.breadcrumb {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.875rem;
    color: #4a5568;
    margin-bottom: 1rem;
    justify-content: center;
}

.breadcrumb-item {
    display: flex;
    align-items: center;
}

.breadcrumb-item:not(:last-child)::after {
    content: '/';
    margin-left: 0.5rem;
    color: #a0aec0;
}

.breadcrumb-link {
    color: #3182ce;
    text-decoration: none;
    transition: color 0.3s ease;
}

.breadcrumb-link:hover {
    color: #2c5aa0;
}

.breadcrumb-current {
    color: #4a5568;
    font-weight: 500;
}

/* Footer */
.footer {
    background: #1a202c;
    color: white;
    padding: 3rem 0 1rem;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    margin-bottom: 2rem;
}

.footer-title {
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: 1rem;
    color: white;
}

.footer-subtitle {
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: 1rem;
    color: #e2e8f0;
}

.footer-description {
    color: #a0aec0;
    line-height: 1.6;
    margin-bottom: 1rem;
}

.footer-email a {
    color: #90cdf4;
    font-weight: 500;
}

.footer-email a:hover {
    color: #63b3ed;
}

.footer-links {
    list-style: none;
}

.footer-links li {
    margin-bottom: 0.5rem;
}

.footer-links a {
    color: #a0aec0;
    transition: color 0.3s ease;
}

.footer-links a:hover {
    color: #90cdf4;
}

.footer-bottom {
    border-top: 1px solid #2d3748;
    padding-top: 1rem;
    text-align: center;
}

.footer-copyright {
    color: #a0aec0;
    font-size: 0.9rem;
}

/* Responsive Design */
@media (max-width: 768px) {
    .nav-menu {
        position: fixed;
        left: -100%;
        top: 70px;
        flex-direction: column;
        background-color: white;
        width: 100%;
        text-align: center;
        transition: 0.3s;
        box-shadow: 0 10px 27px rgba(0, 0, 0, 0.05);
        padding: 2rem 0;
    }

    .nav-menu.active {
        left: 0;
    }

    .nav-toggle {
        display: flex;
    }

    .nav-toggle.active .bar:nth-child(2) {
        opacity: 0;
    }

    .nav-toggle.active .bar:nth-child(1) {
        transform: translateY(8px) rotate(45deg);
    }

    .nav-toggle.active .bar:nth-child(3) {
        transform: translateY(-8px) rotate(-45deg);
    }

    .hero-container {
        grid-template-columns: 1fr;
        text-align: center;
        gap: 2rem;
    }

    .hero-title {
        font-size: 2.5rem;
    }

    .hero-buttons {
        justify-content: center;
    }

    .about-content {
        grid-template-columns: 1fr;
        gap: 2rem;
    }

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

    .tech-grid {
        grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    }

    .footer-content {
        grid-template-columns: 1fr;
        text-align: center;
    }

    .page-title {
        font-size: 2.5rem;
    }

    .policy-wrapper {
        margin: 0 1rem;
    }

    .policy-section {
        padding: 1.5rem;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 1rem;
    }

    .nav-container {
        padding: 0 1rem;
    }

    .hero {
        padding: 100px 0 60px;
    }

    .hero-title {
        font-size: 2rem;
    }

    .hero-description {
        font-size: 1.1rem;
    }

    .section-title {
        font-size: 2rem;
    }

    .btn {
        padding: 0.6rem 1.2rem;
        font-size: 0.9rem;
    }

    .page-title {
        font-size: 2rem;
    }

    .page-subtitle {
        font-size: 1.1rem;
    }

    .policy-section h2 {
        font-size: 1.5rem;
    }

    .policy-section h3 {
        font-size: 1.1rem;
    }
}