/* Reset and Base Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --primary-color: #10a37f;
    --primary-dark: #0d8c6b;
    --secondary-color: #19c37d;
    --text-primary: #2d3748;
    --text-secondary: #4a5568;
    --text-light: #718096;
    --bg-primary: #ffffff;
    --bg-secondary: #f7fafc;
    --bg-tertiary: #edf2f7;
    --border-color: #e2e8f0;
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.1);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.1);
    --border-radius: 8px;
    --transition: all 0.3s ease;
}

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

/* Typography */
h1, h2, h3, h4, h5, h6 {
    font-weight: 600;
    line-height: 1.3;
    margin-bottom: 1rem;
    color: var(--text-primary);
}

h1 {
    font-size: 2.5rem;
    margin-bottom: 1.5rem;
}

h2 {
    font-size: 2rem;
    margin-top: 2.5rem;
    margin-bottom: 1.25rem;
}

h3 {
    font-size: 1.5rem;
    margin-top: 1.5rem;
}

h4 {
    font-size: 1.25rem;
    margin-top: 1.25rem;
}

p {
    margin-bottom: 1rem;
    color: var(--text-secondary);
}

a {
    color: var(--primary-color);
    text-decoration: none;
    transition: var(--transition);
}

a:hover {
    color: var(--primary-dark);
    text-decoration: underline;
}

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

/* Header and Navigation */
header {
    background-color: var(--bg-primary);
    box-shadow: var(--shadow-sm);
    position: sticky;
    top: 0;
    z-index: 1000;
}

.navbar {
    padding: 1rem 0;
}

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

.logo {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--text-primary);
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 2rem;
}

.nav-menu a {
    color: var(--text-secondary);
    font-weight: 500;
    padding: 0.5rem 0;
    border-bottom: 2px solid transparent;
    transition: var(--transition);
}

.nav-menu a:hover,
.nav-menu a.active {
    color: var(--primary-color);
    border-bottom-color: var(--primary-color);
    text-decoration: none;
}

/* Hero Section */
.hero {
    background: linear-gradient(135deg, #10a37f 0%, #19c37d 100%);
    color: white;
    padding: 4rem 0;
    margin-bottom: 3rem;
}

.hero h1 {
    color: white;
    font-size: 3rem;
    margin-bottom: 0.5rem;
}

.hero .subtitle {
    font-size: 1.25rem;
    color: rgba(255, 255, 255, 0.9);
    margin-bottom: 2rem;
}

.hero-content {
    margin-top: 2rem;
}

.lead {
    font-size: 1.125rem;
    color: rgba(255, 255, 255, 0.95);
    line-height: 1.7;
}

/* Page Header */
.page-header {
    background: linear-gradient(135deg, #10a37f 0%, #19c37d 100%);
    color: white;
    padding: 3rem 0;
    margin-bottom: 3rem;
}

.page-header h1 {
    color: white;
    font-size: 2.5rem;
}

.page-header .subtitle {
    font-size: 1.125rem;
    color: rgba(255, 255, 255, 0.9);
}

/* Content Section */
.content-section {
    padding: 2rem 0 4rem;
}

/* Cards and Grid */
.grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 1.5rem;
    margin: 2rem 0;
}

.card {
    background-color: var(--bg-primary);
    border-radius: var(--border-radius);
    padding: 1.5rem;
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
}

.card:hover {
    box-shadow: var(--shadow-md);
    transform: translateY(-2px);
}

.card h3, .card h4 {
    color: var(--text-primary);
    margin-top: 0;
}

.card p {
    margin-bottom: 0;
}

/* Feature Blocks */
.intro-box,
.feature-highlight {
    background-color: var(--bg-primary);
    border-left: 4px solid var(--primary-color);
    padding: 1.5rem;
    margin-bottom: 2rem;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-sm);
}

.feature-block {
    background-color: var(--bg-primary);
    border-radius: var(--border-radius);
    padding: 2rem;
    margin-bottom: 2rem;
    box-shadow: var(--shadow-sm);
}

.feature-details {
    margin-top: 1.5rem;
}

.feature-example {
    background-color: var(--bg-secondary);
    border-radius: var(--border-radius);
    padding: 1.5rem;
    margin-top: 1rem;
}

/* Lists */
ul, ol {
    margin-bottom: 1rem;
    padding-left: 1.5rem;
}

ul li, ol li {
    margin-bottom: 0.5rem;
    color: var(--text-secondary);
}

.numbered-list {
    counter-reset: item;
    list-style: none;
    padding-left: 0;
}

.numbered-list li {
    counter-increment: item;
    margin-bottom: 1rem;
    padding-left: 2.5rem;
    position: relative;
}

.numbered-list li:before {
    content: counter(item);
    position: absolute;
    left: 0;
    top: 0;
    background-color: var(--primary-color);
    color: white;
    width: 1.75rem;
    height: 1.75rem;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 600;
    font-size: 0.875rem;
}

/* Buttons */
.btn {
    display: inline-block;
    padding: 0.75rem 1.5rem;
    border-radius: var(--border-radius);
    font-weight: 600;
    text-decoration: none;
    transition: var(--transition);
    cursor: pointer;
    border: 2px solid transparent;
}

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

.btn-primary:hover {
    background-color: var(--primary-dark);
    text-decoration: none;
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.btn-secondary {
    background-color: transparent;
    color: var(--primary-color);
    border-color: var(--primary-color);
}

.btn-secondary:hover {
    background-color: var(--primary-color);
    color: white;
    text-decoration: none;
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.button-group {
    display: flex;
    gap: 1rem;
    margin-top: 1.5rem;
    flex-wrap: wrap;
}

/* CTA Section */
.cta-section {
    background: linear-gradient(135deg, #10a37f 0%, #19c37d 100%);
    color: white;
    padding: 3rem;
    border-radius: var(--border-radius);
    text-align: center;
    margin: 3rem 0;
}

.cta-section h2 {
    color: white;
    margin-top: 0;
}

.cta-section p {
    color: rgba(255, 255, 255, 0.9);
    font-size: 1.125rem;
}

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

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

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

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

/* Comparison Section */
.comparison {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin: 2rem 0;
}

.comparison-item {
    background-color: var(--bg-primary);
    border-radius: var(--border-radius);
    padding: 1.5rem;
    box-shadow: var(--shadow-sm);
}

/* Testimonial */
.testimonial {
    background-color: var(--bg-primary);
    border-left: 4px solid var(--primary-color);
    padding: 2rem;
    margin: 2rem 0;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-sm);
}

.testimonial blockquote {
    margin: 0;
}

.testimonial p {
    font-size: 1.125rem;
    font-style: italic;
    color: var(--text-primary);
    margin-bottom: 1rem;
}

.testimonial cite {
    color: var(--text-light);
    font-style: normal;
    font-weight: 600;
}

/* Availability Info */
.availability-info {
    background-color: var(--bg-primary);
    border-radius: var(--border-radius);
    padding: 2rem;
    margin: 2rem 0;
    box-shadow: var(--shadow-sm);
}

.note {
    font-style: italic;
    color: var(--text-light);
    margin-top: 1rem;
}

/* Tech Overview */
.tech-overview {
    background-color: var(--bg-primary);
    border-radius: var(--border-radius);
    padding: 2rem;
    margin: 2rem 0;
    box-shadow: var(--shadow-sm);
}

/* Use Cases */
.use-case {
    margin-bottom: 3rem;
}

.example-box {
    background-color: var(--bg-secondary);
    border-radius: var(--border-radius);
    padding: 1.5rem;
    margin-top: 1rem;
}

/* Limitations */
.limitations-section {
    background-color: var(--bg-primary);
    border-radius: var(--border-radius);
    padding: 2rem;
    margin: 2rem 0;
    box-shadow: var(--shadow-sm);
}

.limitation-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1.5rem;
    margin-top: 1.5rem;
}

.limitation-item {
    background-color: var(--bg-secondary);
    padding: 1.25rem;
    border-radius: var(--border-radius);
}

.limitation-item h4 {
    margin-top: 0;
    color: var(--primary-color);
}

/* Safety Features */
.safety-features {
    margin: 2rem 0;
}

/* Warning Box */
.warning-box {
    background-color: #fff5f5;
    border: 2px solid #fc8181;
    border-radius: var(--border-radius);
    padding: 2rem;
    margin: 2rem 0;
}

.warning-box h3 {
    color: #c53030;
    margin-top: 0;
}

.risk-item {
    margin-top: 1.5rem;
}

.risk-item h4 {
    color: #c53030;
}

/* Best Practices */
.best-practices {
    background-color: var(--bg-primary);
    border-radius: var(--border-radius);
    padding: 2rem;
    margin: 2rem 0;
    box-shadow: var(--shadow-sm);
}

/* Future Section */
.future-section {
    background-color: var(--bg-primary);
    border-radius: var(--border-radius);
    padding: 2rem;
    margin: 2rem 0;
    box-shadow: var(--shadow-sm);
}

/* Privacy Page Styles */
.control-section {
    background-color: var(--bg-secondary);
    border-radius: var(--border-radius);
    padding: 1.5rem;
    margin-top: 1rem;
}

.parental-controls-section {
    margin: 2rem 0;
}

.security-item {
    margin-top: 1.5rem;
}

.data-handling {
    margin: 2rem 0;
}

.data-category {
    margin-top: 1.5rem;
}

.transparency-section {
    background-color: var(--bg-primary);
    border-radius: var(--border-radius);
    padding: 2rem;
    margin: 2rem 0;
    box-shadow: var(--shadow-sm);
}

/* Getting Started Page Styles */
.requirements-box {
    background-color: var(--bg-primary);
    border-radius: var(--border-radius);
    padding: 2rem;
    margin: 2rem 0;
    box-shadow: var(--shadow-sm);
}

.requirement-item {
    margin-bottom: 2rem;
}

.requirement-item:last-child {
    margin-bottom: 0;
}

.note-box {
    background-color: #edf2f7;
    border-left: 4px solid var(--primary-color);
    padding: 1rem;
    margin-top: 1.5rem;
    border-radius: 0 var(--border-radius) var(--border-radius) 0;
}

.step-section {
    background-color: var(--bg-primary);
    border-radius: var(--border-radius);
    padding: 2rem;
    margin-bottom: 2rem;
    box-shadow: var(--shadow-sm);
}

.tip-box {
    background-color: #e6fffa;
    border-left: 4px solid var(--primary-color);
    padding: 1rem;
    margin-top: 1rem;
    border-radius: 0 var(--border-radius) var(--border-radius) 0;
}

.config-section {
    margin: 2rem 0;
}

.setting-item {
    background-color: var(--bg-primary);
    border-radius: var(--border-radius);
    padding: 1.5rem;
    margin-bottom: 1.5rem;
    box-shadow: var(--shadow-sm);
}

.setting-item h4 {
    margin-top: 0;
    color: var(--primary-color);
}

.tutorial-section {
    background-color: var(--bg-primary);
    border-radius: var(--border-radius);
    padding: 2rem;
    margin-bottom: 2rem;
    box-shadow: var(--shadow-sm);
}

.tutorial-step {
    margin-top: 1rem;
}

/* Keyboard Shortcuts */
.shortcuts-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
    margin: 2rem 0;
}

.shortcut-category {
    background-color: var(--bg-primary);
    border-radius: var(--border-radius);
    padding: 1.5rem;
    box-shadow: var(--shadow-sm);
}

.shortcut-list {
    list-style: none;
    padding-left: 0;
}

.shortcut-list li {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0.5rem 0;
    border-bottom: 1px solid var(--border-color);
}

.shortcut-list li:last-child {
    border-bottom: none;
}

.key {
    background-color: var(--bg-tertiary);
    padding: 0.25rem 0.5rem;
    border-radius: 4px;
    font-family: 'Courier New', monospace;
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--text-primary);
}

/* FAQ Section */
.faq-section {
    margin: 2rem 0;
}

.faq-item {
    background-color: var(--bg-primary);
    border-radius: var(--border-radius);
    padding: 1.5rem;
    margin-bottom: 1.5rem;
    box-shadow: var(--shadow-sm);
}

.faq-item h3 {
    margin-top: 0;
    color: var(--primary-color);
}

/* Tips Grid */
.tips-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 1.5rem;
    margin: 2rem 0;
}

/* Next Steps */
.next-steps {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1.5rem;
    margin: 2rem 0;
}

.step-card {
    background-color: var(--bg-primary);
    border-radius: var(--border-radius);
    padding: 1.5rem;
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
}

.step-card:hover {
    box-shadow: var(--shadow-md);
    transform: translateY(-2px);
}

.step-card h3 {
    margin-top: 0;
    color: var(--primary-color);
}

.final-note {
    background-color: var(--bg-primary);
    border-radius: var(--border-radius);
    padding: 2rem;
    margin: 3rem 0;
    box-shadow: var(--shadow-sm);
}

/* Standard Features */
.standard-features,
.performance-section,
.roadmap-section {
    margin: 2rem 0;
}

/* Footer */
footer {
    background-color: var(--text-primary);
    color: white;
    padding: 2rem 0;
    margin-top: 4rem;
    text-align: center;
}

footer p {
    color: rgba(255, 255, 255, 0.8);
    margin-bottom: 0.5rem;
}

/* Responsive Design */
@media (max-width: 768px) {
    .container {
        padding: 0 1rem;
    }

    .nav-container {
        flex-direction: column;
        gap: 1rem;
        padding: 0 1rem;
    }

    .nav-menu {
        flex-wrap: wrap;
        justify-content: center;
        gap: 1rem;
    }

    .hero h1 {
        font-size: 2rem;
    }

    .hero .subtitle {
        font-size: 1rem;
    }

    h1 {
        font-size: 2rem;
    }

    h2 {
        font-size: 1.5rem;
    }

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

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

    .button-group {
        flex-direction: column;
    }

    .btn {
        text-align: center;
    }

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

    .cta-section {
        padding: 2rem 1.5rem;
    }
}

/* Print Styles */
@media print {
    header,
    footer,
    .button-group,
    .cta-section {
        display: none;
    }

    body {
        background-color: white;
    }

    .card,
    .feature-block {
        box-shadow: none;
        border: 1px solid var(--border-color);
    }
}