:root {
    --primary: #0ea5e9;
    --primary-dark: #0284c7;
    --secondary: #8b5cf6;
    --accent: #06b6d4;
    --background: #0f172a;
    --background-light: #1e293b;
    --text: #f8fafc;
    --text-muted: #94a3b8;
    --border: #334155;
    --success: #10b981;
    --warning: #f59e0b;
}

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

body {
    font-family: 'Inter', sans-serif;
    background-color: var(--background);
    color: var(--text);
    line-height: 1.6;
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

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

header {
    padding: 1.5rem 0;
    border-bottom: 1px solid var(--border);
}

nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    display: flex;
    align-items: center;
    font-weight: 700;
    font-size: 1.5rem;
    color: var(--primary);
}

.logo span {
    color: var(--text);
    margin-left: 0.25rem;
}

.nav-links {
    display: flex;
    gap: 2rem;
}

.nav-links a {
    color: var(--text);
    text-decoration: none;
    font-weight: 500;
    transition: color 0.3s;
}

.nav-links a:hover,
.nav-links a.active {
    color: var(--primary);
}

.cta-button {
    background-color: var(--primary);
    color: white;
    border: none;
    padding: 0.5rem 1.25rem;
    border-radius: 6px;
    font-weight: 500;
    cursor: pointer;
    transition: background-color 0.3s;
}

.cta-button:hover {
    background-color: var(--primary-dark);
}

.hero {
    padding: 6rem 0;
    text-align: center;
}

.hero h1 {
    font-size: 3.5rem;
    line-height: 1.2;
    margin-bottom: 1.5rem;
    background: linear-gradient(90deg, var(--primary), var(--secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero p {
    font-size: 1.25rem;
    color: var(--text-muted);
    max-width: 800px;
    margin: 0 auto 2.5rem;
}

.hero-buttons {
    display: flex;
    gap: 1rem;
    justify-content: center;
}

.secondary-button {
    background-color: transparent;
    color: var(--primary);
    border: 1px solid var(--primary);
    padding: 0.5rem 1.25rem;
    border-radius: 6px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.3s;
}

.secondary-button:hover {
    background-color: rgba(14, 165, 233, 0.1);
}

.features {
    padding: 5rem 0;
    background-color: var(--background-light);
}

.section-title {
    text-align: center;
    margin-bottom: 3rem;
}

.section-title h2 {
    font-size: 2.5rem;
    margin-bottom: 1rem;
}

.section-title p {
    color: var(--text-muted);
    max-width: 600px;
    margin: 0 auto;
}

.feature-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}

.feature-card {
    background-color: var(--background);
    border-radius: 8px;
    padding: 2rem;
    border: 1px solid var(--border);
    transition: transform 0.3s, border-color 0.3s;
}

.feature-card:hover {
    transform: translateY(-5px);
    border-color: var(--primary);
}

.feature-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    border-radius: 8px;
    margin-right: 1rem;
    background-color: rgba(14, 165, 233, 0.1);
    color: var(--primary);
    font-size: 1.25rem;
}

.feature-card h3 {
    margin-bottom: 1rem;
    font-size: 1.5rem;
    display: flex;
    align-items: center;
}

.feature-card p {
    color: var(--text-muted);
}

.how-it-works {
    padding: 5rem 0;
}

.protocol-diagram {
    margin: 3rem 0;
    text-align: center;
}

.protocol-diagram img {
    max-width: 100%;
    border-radius: 8px;
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.4);
}

.use-cases {
    padding: 5rem 0;
    background-color: var(--background-light);
}

.case-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}

.case-card {
    background-color: var(--background);
    border-radius: 8px;
    overflow: hidden;
    border: 1px solid var(--border);
    transition: transform 0.3s;
}

.case-card:hover {
    transform: translateY(-5px);
}

.case-image {
    height: 150px;
    background-color: #334155;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--primary);
    font-size: 4rem;
}

.case-content {
    padding: 1.5rem;
}

.case-content h3 {
    margin-bottom: 0.75rem;
    font-size: 1.25rem;
}

.case-content p {
    color: var(--text-muted);
    font-size: 0.95rem;
}

.cta-section {
    padding: 5rem 0;
    text-align: center;
}

.cta-section h2 {
    font-size: 2.5rem;
    margin-bottom: 1.5rem;
}

.cta-section p {
    color: var(--text-muted);
    max-width: 600px;
    margin: 0 auto 2rem;
}

footer {
    padding: 3rem 0;
    border-top: 1px solid var(--border);
    background-color: var(--background-light);
    margin-top: auto;
}

.footer-content {
    display: flex;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 2rem;
}

.footer-logo {
    flex: 1;
    min-width: 200px;
}

.footer-logo h3 {
    font-size: 1.5rem;
    margin-bottom: 1rem;
    color: var(--primary);
}

.footer-logo p {
    color: var(--text-muted);
}

.footer-links {
    flex: 2;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: 2rem;
}

.footer-links h4 {
    margin-bottom: 1rem;
    font-size: 1rem;
}

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

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

.footer-links a {
    color: var(--text-muted);
    text-decoration: none;
    transition: color 0.3s;
}

.footer-links a:hover {
    color: var(--primary);
}

.copyright {
    margin-top: 2rem;
    text-align: center;
    color: var(--text-muted);
    font-size: 0.875rem;
}

.protocol-steps {
    display: flex;
    justify-content: space-between;
    margin: 3rem 0;
    position: relative;
    padding: 0 1rem;
}

.protocol-steps::before {
    content: '';
    position: absolute;
    top: 3rem;
    left: 1rem;
    right: 1rem;
    height: 2px;
    background: linear-gradient(90deg, var(--primary), var(--secondary));
    z-index: 0;
}

.step {
    position: relative;
    z-index: 1;
    text-align: center;
    max-width: 180px;
}

.step-icon {
    width: 80px;
    height: 80px;
    border-radius: 50%;
    background-color: var(--background);
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 1.5rem;
    border: 2px solid var(--primary);
    position: relative;
    color: var(--primary);
    font-size: 1.5rem;
    font-weight: 700;
}

.step h3 {
    margin-bottom: 0.75rem;
    font-size: 1.1rem;
}

.step p {
    font-size: 0.9rem;
    color: var(--text-muted);
}

/* Documentation Specific Styles */
.page-header {
    padding: 2.5rem 0;
    text-align: center;
    background-color: var(--background-light);
}

.page-header h1 {
    font-size: 2.5rem;
    margin-bottom: 1rem;
}

.page-header p {
    font-size: 1.1rem;
    color: var(--text-muted);
    max-width: 800px;
    margin: 0 auto;
}

main {
    display: flex;
    flex: 1;
    padding: 2rem 0;
}

.doc-nav {
    width: 280px;
    flex-shrink: 0;
    background-color: var(--background);
    border-right: 1px solid var(--border);
    padding: 1.5rem 0;
    position: sticky;
    top: 0;
    height: 100vh;
    overflow-y: auto;
}

.doc-nav-inner {
    padding: 0 1.5rem;
}

.doc-nav h3 {
    color: var(--text-muted);
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: 0.75rem;
    margin-top: 1.5rem;
}

.doc-nav h3:first-child {
    margin-top: 0;
}

.doc-nav ul {
    list-style: none;
    margin-bottom: 1.5rem;
}

.doc-nav li {
    margin-bottom: 0.5rem;
}

.doc-nav li a {
    color: var(--text);
    text-decoration: none;
    font-size: 0.9rem;
    display: block;
    padding: 0.35rem 0;
    border-radius: 4px;
    transition: all 0.2s;
}

.doc-nav li a:hover, .doc-nav li a.active {
    color: var(--primary);
}

.doc-nav li a.active {
    background-color: rgba(14, 165, 233, 0.1);
    padding-left: 0.5rem;
}

.doc-nav-section {
    margin-bottom: 0.5rem;
}

.doc-nav-section > span {
    color: var(--text-muted);
    font-size: 0.85rem;
    display: block;
    margin-bottom: 0.5rem;
    padding-left: 0.5rem;
}

.doc-nav-section ul {
    padding-left: 1rem;
    margin-bottom: 0.75rem;
}

.doc-content {
    flex: 1;
    padding: 0 2rem 2rem;
    max-width: 920px;
    margin: 0 auto;
}

.doc-content h2 {
    font-size: 1.8rem;
    margin-top: 2.5rem;
    margin-bottom: 1rem;
    padding-bottom: 0.5rem;
    border-bottom: 1px solid var(--border);
}

.doc-content h2:first-child {
    margin-top: 0;
}

.doc-content h3 {
    font-size: 1.4rem;
    margin-top: 2rem;
    margin-bottom: 1rem;
}

.doc-content h4 {
    font-size: 1.1rem;
    margin-top: 1.5rem;
    margin-bottom: 0.75rem;
}

.doc-content p {
    margin-bottom: 1.25rem;
}

.doc-content ul, .doc-content ol {
    margin-bottom: 1.25rem;
    padding-left: 1.5rem;
}

.doc-content li {
    margin-bottom: 0.5rem;
}

.doc-content a {
    color: var(--primary);
    text-decoration: none;
}

.doc-content a:hover {
    text-decoration: underline;
}

.doc-content code {
    font-family: 'Courier New', Courier, monospace;
    background-color: var(--background-light);
    padding: 0.2rem 0.4rem;
    border-radius: 4px;
    font-size: 0.9em;
}

.doc-content pre {
    background-color: var(--background-light);
    padding: 1rem;
    border-radius: 6px;
    margin-bottom: 1.5rem;
    overflow-x: auto;
}

.doc-content pre code {
    background-color: transparent;
    padding: 0;
    font-size: 0.9rem;
    display: block;
}

.doc-content table {
    width: 100%;
    border-collapse: collapse;
    margin-bottom: 1.5rem;
}

.doc-content table th, .doc-content table td {
    padding: 0.75rem;
    border: 1px solid var(--border);
    text-align: left;
}

.doc-content table th {
    background-color: var(--background-light);
}

.doc-content blockquote {
    border-left: 4px solid var(--primary);
    padding-left: 1rem;
    margin-bottom: 1.5rem;
    color: var(--text-muted);
}

.alert {
    padding: 1rem;
    border-radius: 6px;
    margin-bottom: 1.5rem;
    border-left: 4px solid;
}

.alert-info {
    background-color: rgba(14, 165, 233, 0.1);
    border-color: var(--primary);
}

.alert-warning {
    background-color: rgba(245, 158, 11, 0.1);
    border-color: var(--warning);
}

/* Diagram support for clustering page */
.diagram {
    background-color: var(--background-light);
    border-radius: 8px;
    padding: 2rem;
    margin: 1.5rem 0;
    text-align: center;
    border: 1px solid var(--border);
}

.diagram img {
    max-width: 100%;
}

.diagram pre {
    margin-bottom: 0;
    text-align: left;
}

@media (max-width: 1024px) {
    .doc-nav {
        display: none;
    }
    
    .mobile-menu-toggle {
        display: block;
    }
}

@media (max-width: 768px) {
    .nav-links {
        display: none;
    }

    .hero h1 {
        font-size: 2.5rem;
    }

    .protocol-steps {
        flex-direction: column;
        align-items: center;
        gap: 3rem;
    }

        .protocol-steps::before {
            display: none; /* Simply hide the connecting line on mobile */
        }

    .hero-buttons {
        flex-direction: column;
        align-items: center;
    }

    .footer-content {
        flex-direction: column;
    }
}

/* Mobile Navigation Styles */
.mobile-menu-toggle {
    display: none;
    background: none;
    border: none;
    color: var(--text);
    font-size: 1.5rem;
    cursor: pointer;
    padding: 0.5rem;
}

    .mobile-menu-toggle:hover {
        color: var(--primary);
    }

.mobile-nav-overlay {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: rgba(0, 0, 0, 0.5);
    z-index: 200;
}

.mobile-nav-panel {
    position: fixed;
    top: 0;
    left: -320px;
    width: 300px;
    height: 100vh;
    background-color: var(--background);
    border-right: 1px solid var(--border);
    transition: left 0.3s ease;
    z-index: 201;
    overflow-y: auto;
}

.mobile-nav-header {
    padding: 1rem 1.5rem;
    border-bottom: 1px solid var(--border);
    display: flex;
    justify-content: space-between;
    align-items: center;
    background-color: var(--background-light);
}

.mobile-nav-close {
    background: none;
    border: none;
    color: var(--text);
    font-size: 1.5rem;
    cursor: pointer;
    padding: 0.5rem;
}

    .mobile-nav-close:hover {
        color: var(--primary);
    }

.mobile-nav-content {
    padding: 1.5rem;
}

.mobile-main-nav {
    margin-bottom: 2rem;
    padding-bottom: 1.5rem;
    border-bottom: 1px solid var(--border);
}

    .mobile-main-nav h3 {
        color: var(--primary);
        font-size: 1rem;
        margin-bottom: 1rem;
        text-transform: uppercase;
        letter-spacing: 0.05em;
    }

    .mobile-main-nav ul {
        list-style: none;
    }

    .mobile-main-nav li {
        margin-bottom: 0.75rem;
    }

    .mobile-main-nav a {
        color: var(--text);
        text-decoration: none;
        font-size: 1rem;
        font-weight: 500;
        display: block;
        padding: 0.5rem 0;
        transition: color 0.3s;
    }

        .mobile-main-nav a:hover,
        .mobile-main-nav a.active {
            color: var(--primary);
        }

/* Documentation Navigation in Mobile Menu */
.mobile-doc-nav h3 {
    color: var(--text-muted);
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: 0.75rem;
    margin-top: 1.5rem;
}

    .mobile-doc-nav h3:first-child {
        margin-top: 0;
    }

.mobile-doc-nav ul {
    list-style: none;
    margin-bottom: 1.5rem;
}

.mobile-doc-nav li {
    margin-bottom: 0.5rem;
}

    .mobile-doc-nav li a {
        color: var(--text);
        text-decoration: none;
        font-size: 0.9rem;
        display: block;
        padding: 0.35rem 0;
        border-radius: 4px;
        transition: all 0.2s;
    }

        .mobile-doc-nav li a:hover,
        .mobile-doc-nav li a.active {
            color: var(--primary);
        }

        .mobile-doc-nav li a.active {
            background-color: rgba(14, 165, 233, 0.1);
            padding-left: 0.5rem;
        }
.mobile-cta {
    margin-top: 2rem;
    padding-top: 1.5rem;
    border-top: 1px solid var(--border);
}

    .mobile-cta .cta-button {
        width: 100%;
    }

@media (max-width: 768px) {
    .nav-links,
    .cta-button {
        display: none;
    }

    .mobile-menu-toggle {
        display: block;
    }

    .mobile-nav-overlay.open {
        display: block;
    }

    .mobile-nav-panel.open {
        left: 0;
    }
}

/* Confidentiality Popup Styles */
.confidentiality-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.8);
    z-index: 10000;
    display: none;
}

.confidentiality-popup {
    position: fixed;
    top: 5vh;
    left: 50%;
    transform: translateX(-50%);
    background: white;
    max-width: 800px;
    max-height: 90vh;
    width: 90%;
    border-radius: 8px;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.3);
    overflow: hidden;
    z-index: 10001;
    display: flex;
    flex-direction: column;
}

.confidentiality-header {
    background-color: #1a365d;
    color: white;
    padding: 1.5rem;
    text-align: center;
}

.confidentiality-header h2 {
    margin: 0;
    font-size: 1.5rem;
}

.confidentiality-content {
    padding: 2rem;
    flex: 1;
    overflow-y: auto;
    line-height: 1.6;
    color: #2d3748;
}

.confidentiality-content h3 {
    color: #1a365d;
    margin-top: 2rem;
    margin-bottom: 1rem;
}

.confidentiality-content h3:first-child {
    margin-top: 0;
}

.confidentiality-content ul {
    margin: 1rem 0;
    padding-left: 2rem;
}

.confidentiality-footer {
    background-color: #f7fafc;
    padding: 2rem;
    border-top: 1px solid #e2e8f0;
    flex-shrink: 0;
}

.consent-section {
    background-color: #fff5f5;
    border: 2px solid #feb2b2;
    border-radius: 8px;
    padding: 1.5rem;
    margin-bottom: 1.5rem;
}

.consent-section h4 {
    color: #c53030;
    margin: 0 0 1rem 0;
}

.consent-section p,
.consent-section ul {
    color: #2d3748;
}

.checkbox-container {
    display: flex;
    align-items: flex-start;
    gap: 0.75rem;
    margin: 1.5rem 0;
}

.checkbox-container input[type="checkbox"] {
    margin-top: 0.25rem;
    transform: scale(1.2);
}

.checkbox-container label {
    font-weight: 600;
    cursor: pointer;
    color: #2d3748;
}

.button-container {
    display: flex;
    gap: 1rem;
    justify-content: center;
}

.popup-button {
    padding: 0.75rem 2rem;
    border: none;
    border-radius: 4px;
    font-weight: 600;
    cursor: pointer;
    font-size: 1rem;
    transition: all 0.3s;
}

.agree-button {
    background-color: #38a169;
    color: white;
}

.agree-button:hover:not(:disabled) {
    background-color: #2f855a;
}

.agree-button:disabled {
    background-color: #a0aec0;
    cursor: not-allowed;
}

.disagree-button {
    background-color: #e53e3e;
    color: white;
}

.disagree-button:hover {
    background-color: #c53030;
}

@media (max-width: 768px) {
    .confidentiality-popup {
        top: 1vh;
        width: 98%;
        max-height: 98vh;
    }
    
    .confidentiality-header {
        padding: 1rem;
    }
    
    .confidentiality-header h2 {
        font-size: 1.2rem;
    }
    
    .confidentiality-header p {
        font-size: 0.9rem;
        margin: 0.25rem 0 0 0;
    }
    
    .confidentiality-content {
        padding: 1rem;
        font-size: 0.9rem;
    }
    
    .confidentiality-content h3 {
        font-size: 1.1rem;
        margin-top: 1.5rem;
        margin-bottom: 0.75rem;
    }
    
    .confidentiality-footer {
        padding: 1rem;
    }
    
    .consent-section {
        padding: 1rem;
        margin-bottom: 1rem;
    }
    
    .consent-section h4 {
        font-size: 1rem;
    }
    
    .consent-section p,
    .consent-section ul {
        font-size: 0.85rem;
    }
    
    .consent-section ul {
        padding-left: 1.5rem;
    }
    
    .checkbox-container {
        margin: 1rem 0;
    }
    
    .checkbox-container label {
        font-size: 0.9rem;
    }
    
    .button-container {
        flex-direction: column;
        gap: 0.75rem;
    }
    
    .popup-button {
        padding: 0.75rem 1rem;
        font-size: 0.9rem;
    }
}