/* Introduction Page Styles */

.intro-content {
    background: var(--bg-dark);
    width: 100%;
    max-width: 100vw;
    overflow-x: hidden;
}

/* Hero Section */
.hero {
    background: linear-gradient(135deg, #1a1f35 0%, #0d1117 50%, #161b22 100%);
    padding: 80px 60px;
    text-align: center;
    border-bottom: 1px solid var(--border-color);
}

.hero h1 {
    font-size: 3rem;
    font-weight: 700;
    color: var(--text-heading);
    margin-bottom: 16px;
    background: linear-gradient(135deg, #fff 0%, #58a6ff 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: 1.3rem;
    color: var(--text-secondary);
    margin-bottom: 32px;
}

.hero-badges {
    display: flex;
    justify-content: center;
    gap: 16px;
    flex-wrap: wrap;
    margin-bottom: 40px;
}

.badge-item {
    background: rgba(88, 166, 255, 0.1);
    border: 1px solid rgba(88, 166, 255, 0.3);
    color: var(--accent-blue);
    padding: 8px 16px;
    border-radius: 20px;
    font-size: 0.9rem;
}

.hero-actions {
    display: flex;
    justify-content: center;
    gap: 16px;
}

.btn {
    padding: 12px 28px;
    border-radius: 8px;
    font-size: 1rem;
    font-weight: 600;
    text-decoration: none;
    transition: all 0.2s ease;
}

.btn-primary {
    background: var(--accent-blue);
    color: #fff;
}

.btn-primary:hover {
    background: #79b8ff;
    transform: translateY(-2px);
}

.btn-secondary {
    background: transparent;
    color: var(--text-primary);
    border: 1px solid var(--border-color);
}

.btn-secondary:hover {
    background: var(--bg-sidebar);
    border-color: var(--accent-blue);
}

/* Section Styling */
.intro-section {
    padding: 60px;
    border-bottom: 1px solid var(--border-color);
}

.intro-section.alt-bg {
    background: var(--bg-sidebar);
}

.intro-section h2 {
    font-size: 2rem;
    color: var(--text-heading);
    margin-bottom: 32px;
    text-align: center;
}

/* Overview Section */
.overview-grid {
    display: grid;
    gap: 40px;
}

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

.overview-text p {
    font-size: 1.1rem;
    line-height: 1.8;
    margin-bottom: 16px;
    color: var(--text-primary);
}

.overview-features {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 24px;
    margin-top: 20px;
}

.feature-card {
    background: var(--bg-code);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 24px;
    text-align: center;
    transition: all 0.2s ease;
}

.feature-card:hover {
    border-color: var(--accent-blue);
    transform: translateY(-4px);
}

.feature-icon {
    font-size: 2.5rem;
    margin-bottom: 16px;
}

.feature-card h3 {
    color: var(--text-heading);
    margin-bottom: 8px;
}

.feature-card p {
    color: var(--text-secondary);
    font-size: 0.9rem;
}

/* Comparison Table */
.comparison-table {
    overflow-x: auto;
}

.comparison-table table {
    width: 100%;
    max-width: 900px;
    margin: 0 auto;
    border-collapse: collapse;
}

.comparison-table th,
.comparison-table td {
    padding: 16px;
    text-align: left;
    border-bottom: 1px solid var(--border-color);
}

.comparison-table th {
    background: var(--bg-code);
    color: var(--text-secondary);
    font-weight: 600;
    font-size: 0.85rem;
    text-transform: uppercase;
}

.comparison-table td {
    color: var(--text-primary);
}

.comparison-table td.highlight {
    color: var(--accent-green);
    font-weight: 500;
}

/* Architecture Diagram */
.architecture-diagram {
    max-width: 700px;
    margin: 0 auto;
}

.arch-layer {
    background: var(--bg-code);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 20px;
    margin: 8px 0;
}

.layer-label {
    font-weight: 700;
    color: var(--text-heading);
    text-align: center;
    margin-bottom: 12px;
    font-size: 1.1rem;
}

.layer-content {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: 8px;
}

.tech-badge {
    background: var(--bg-dark);
    border: 1px solid var(--border-color);
    padding: 6px 12px;
    border-radius: 6px;
    font-size: 0.85rem;
    color: var(--text-primary);
}

.layer-components {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 12px;
}

.component {
    background: var(--bg-dark);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 12px;
    text-align: center;
}

.component strong {
    display: block;
    color: var(--accent-blue);
    font-size: 0.9rem;
    margin-bottom: 4px;
}

.component span {
    font-size: 0.75rem;
    color: var(--text-secondary);
}

.arch-arrow {
    text-align: center;
    color: var(--text-secondary);
    font-size: 1.5rem;
    margin: 4px 0;
}

.gateway-layer { border-color: var(--accent-blue); }
.core-layer { border-color: var(--accent-purple); }
.blockstore-layer { border-color: var(--accent-yellow); }
.crypto-layer { border-color: var(--accent-green); }
.ipfs-layer { border-color: var(--accent-blue); background: rgba(88, 166, 255, 0.05); }

.node-grid {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: 12px;
    margin-bottom: 12px;
}

.node {
    background: var(--bg-dark);
    padding: 8px 16px;
    border-radius: 8px;
    font-size: 0.9rem;
}

.layer-desc {
    text-align: center;
    color: var(--text-secondary);
    font-size: 0.9rem;
}

/* Flow Diagram */
.flow-diagram {
    max-width: 600px;
    margin: 0 auto;
}

.flow-step {
    display: flex;
    gap: 20px;
    align-items: flex-start;
}

.step-number {
    width: 40px;
    height: 40px;
    background: var(--accent-blue);
    color: #fff;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    flex-shrink: 0;
}

.step-content {
    flex: 1;
}

.step-content h3 {
    color: var(--text-heading);
    margin-bottom: 8px;
}

.step-content p {
    color: var(--text-secondary);
    margin-bottom: 8px;
}

.step-content code {
    display: block;
    background: var(--bg-dark);
    padding: 8px 12px;
    border-radius: 6px;
    font-family: 'Fira Code', monospace;
    font-size: 0.85rem;
    color: var(--accent-green);
}

.flow-connector {
    width: 2px;
    height: 30px;
    background: var(--border-color);
    margin: 8px 0 8px 19px;
}

/* Encryption Grid */
.encryption-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 24px;
}

.encryption-card {
    background: var(--bg-code);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 24px;
}

.encryption-card h3 {
    color: var(--text-heading);
    margin-bottom: 12px;
    font-size: 1.1rem;
}

.encryption-card p {
    color: var(--text-secondary);
    margin-bottom: 12px;
}

.encryption-card ul {
    list-style: none;
    margin-bottom: 16px;
}

.encryption-card li {
    color: var(--text-primary);
    padding: 4px 0;
    font-size: 0.9rem;
}

.encryption-card li strong {
    color: var(--accent-blue);
}

.code-block {
    background: var(--bg-dark);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 12px;
    overflow-x: auto;
}

.code-block pre {
    margin: 0;
    font-family: 'Fira Code', monospace;
    font-size: 0.8rem;
    color: var(--text-primary);
    white-space: pre;
}

/* Section CTA */
.section-cta {
    margin-top: 32px;
    text-align: center;
}

.section-cta .btn {
    display: inline-block;
}

/* Data Structures */
.ds-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 24px;
}

.ds-card {
    background: var(--bg-dark);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 24px;
}

.ds-card h3 {
    color: var(--text-heading);
    margin-bottom: 12px;
}

.ds-card p {
    color: var(--text-secondary);
    margin-bottom: 12px;
}

.ds-card ul {
    list-style: none;
    margin-bottom: 16px;
}

.ds-card li {
    color: var(--text-primary);
    padding: 4px 0;
    font-size: 0.9rem;
}

.ds-diagram {
    background: var(--bg-code);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 16px;
}

.ds-diagram pre {
    margin: 0;
    font-family: 'Fira Code', monospace;
    font-size: 0.75rem;
    color: var(--accent-green);
    text-align: center;
}

/* Getting Started */
.getting-started-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 24px;
    margin-bottom: 40px;
}

.gs-card {
    background: var(--bg-code);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 24px;
}

.gs-card h3 {
    color: var(--text-heading);
    margin-bottom: 12px;
}

.gs-card p {
    color: var(--text-secondary);
    margin-bottom: 16px;
    font-size: 0.9rem;
}

.gs-card .code-block pre {
    font-size: 0.75rem;
    line-height: 1.5;
}

/* Next Steps */
.next-steps {
    background: var(--bg-code);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 32px;
}

.next-steps h3 {
    color: var(--text-heading);
    margin-bottom: 20px;
    text-align: center;
}

.next-links {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 16px;
}

.next-link {
    display: flex;
    align-items: center;
    gap: 16px;
    background: var(--bg-dark);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 16px;
    text-decoration: none;
    transition: all 0.2s ease;
}

.next-link:hover {
    border-color: var(--accent-blue);
    transform: translateY(-2px);
}

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

.next-text {
    display: flex;
    flex-direction: column;
}

.next-text strong {
    color: var(--text-heading);
}

.next-text span {
    color: var(--text-secondary);
    font-size: 0.85rem;
}

/* Footer */
footer {
    padding: 40px 60px;
    text-align: center;
    color: var(--text-secondary);
    border-top: 1px solid var(--border-color);
}

.footer-links {
    margin-top: 12px;
}

.footer-links a {
    color: var(--accent-blue);
    text-decoration: none;
}

.footer-links a:hover {
    text-decoration: underline;
}

/* Section Subtitles */
.section-subtitle {
    color: var(--text-heading);
    font-size: 1.2rem;
    margin: 32px 0 20px;
    padding-bottom: 8px;
    border-bottom: 1px solid var(--border-color);
}

/* Setup Row */
.setup-row {
    grid-template-columns: repeat(3, 1fr);
}

/* Quickstart Code Section */
.quickstart-code {
    background: var(--bg-code);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    overflow: hidden;
    margin-top: 16px;
}

.code-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 16px 24px;
    background: var(--bg-sidebar);
    border-bottom: 1px solid var(--border-color);
}

.code-title {
    color: var(--text-heading);
    font-weight: 600;
    font-size: 1rem;
}

.code-lang {
    color: var(--accent-blue);
    font-size: 0.85rem;
    background: rgba(88, 166, 255, 0.1);
    padding: 4px 12px;
    border-radius: 4px;
}

.quickstart-code .code-block.large {
    border: none;
    border-radius: 0;
    margin: 0;
    padding: 24px;
    max-height: 500px;
    overflow-y: auto;
}

.quickstart-code .code-block.large pre {
    margin: 0;
    font-size: 0.8rem;
    line-height: 1.6;
}

.code-comment {
    color: #6a9955;
    font-style: italic;
}

.code-output {
    background: #1a1f2e;
    border-top: 1px solid var(--border-color);
    padding: 20px 24px;
}

.output-header {
    color: var(--accent-green);
    font-size: 0.85rem;
    font-weight: 600;
    margin-bottom: 12px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.code-output pre {
    margin: 0;
    font-family: 'Fira Code', monospace;
    font-size: 0.8rem;
    color: var(--text-primary);
    line-height: 1.5;
}

/* Light Theme Adjustments for Intro */
[data-theme="light"] .hero {
    background: linear-gradient(135deg, #f6f8fa 0%, #ffffff 50%, #f0f3f6 100%);
}

[data-theme="light"] .hero h1 {
    background: linear-gradient(135deg, #1f2328 0%, #0969da 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

[data-theme="light"] .badge-item {
    background: rgba(9, 105, 218, 0.1);
    border-color: rgba(9, 105, 218, 0.3);
}

[data-theme="light"] .code-comment {
    color: #6a737d;
}

[data-theme="light"] .code-output {
    background: #f6f8fa;
}

[data-theme="light"] .ds-diagram pre,
[data-theme="light"] .step-content code {
    color: var(--accent-green);
}

/* Responsive */
@media (max-width: 768px) {
    .intro-content {
        padding-top: 60px;
        width: 100%;
        max-width: 100vw;
    }
    
    .hero {
        padding: 40px 16px;
        width: 100%;
    }
    
    .setup-row {
        grid-template-columns: 1fr;
    }

    .hero h1 {
        font-size: 1.6rem;
        word-break: break-word;
    }
    
    .hero-subtitle {
        font-size: 0.95rem;
    }

    .intro-section {
        padding: 32px 16px;
        width: 100%;
        max-width: 100%;
    }
    
    .intro-section h2 {
        font-size: 1.4rem;
    }

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

    .hero-badges {
        flex-direction: column;
        align-items: center;
        gap: 8px;
    }
    
    .badge-item {
        font-size: 0.8rem;
        padding: 6px 12px;
    }
    
    .hero-actions {
        flex-direction: column;
        width: 100%;
        padding: 0 16px;
    }
    
    .hero-actions .btn {
        width: 100%;
        text-align: center;
    }
    
    .architecture-diagram {
        width: 100%;
        overflow-x: auto;
    }
    
    .code-block {
        max-width: 100%;
        overflow-x: auto;
    }
    
    .code-block pre {
        font-size: 0.7rem;
        white-space: pre-wrap;
        word-break: break-all;
    }
    
    .overview-features {
        grid-template-columns: 1fr;
    }
    
    .encryption-grid {
        grid-template-columns: 1fr;
    }
    
    .ds-grid {
        grid-template-columns: 1fr;
    }
    
    .getting-started-grid {
        grid-template-columns: 1fr;
    }
    
    .next-links {
        grid-template-columns: 1fr;
    }
    
    .comparison-table th,
    .comparison-table td {
        padding: 12px 8px;
        font-size: 0.85rem;
    }
    
    .quickstart-code .code-block.large {
        padding: 16px;
        max-height: 400px;
    }
    
    .quickstart-code .code-block.large pre {
        font-size: 0.7rem;
    }
    
    .code-header {
        flex-direction: column;
        gap: 8px;
        text-align: center;
    }
    
    .flow-step {
        flex-direction: column;
        align-items: center;
        text-align: center;
    }
    
    .step-content code {
        font-size: 0.75rem;
    }
    
    footer {
        padding: 24px 16px;
    }
}

@media (max-width: 480px) {
    .hero h1 {
        font-size: 1.5rem;
    }
    
    .intro-section {
        padding: 32px 12px;
    }
    
    .feature-card,
    .encryption-card,
    .ds-card,
    .gs-card {
        padding: 16px;
    }
    
    .arch-layer {
        padding: 12px;
    }
    
    .component {
        padding: 8px;
    }
    
    .component strong {
        font-size: 0.8rem;
    }
    
    .component span {
        font-size: 0.65rem;
    }
}