/* SensorGuard - Liquid Glass Design System */

:root {
    --primary: #3b82f6;
    --primary-light: #60a5fa;
    --primary-dark: #2563eb;
    --secondary: #8b5cf6;
    --accent: #06b6d4;
    --success: #10b981;
    --warning: #f59e0b;
    --danger: #ef4444;
    
    --bg-primary: #0f172a;
    --bg-secondary: #1e293b;
    --bg-tertiary: #334155;
    
    --text-primary: #f8fafc;
    --text-secondary: #cbd5e1;
    --text-muted: #94a3b8;
    
    --glass-bg: rgba(255, 255, 255, 0.05);
    --glass-border: rgba(255, 255, 255, 0.1);
    --glass-shadow: rgba(0, 0, 0, 0.3);
    
    --radius-lg: 1rem;
    --radius-xl: 1.5rem;
    --radius-2xl: 2rem;
    --radius-full: 9999px;
    
    --transition: cubic-bezier(0.4, 0, 0.2, 1);
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    background: linear-gradient(135deg, #0f172a 0%, #1e293b 50%, #0f172a 100%);
    color: var(--text-primary);
    line-height: 1.6;
    min-height: 100vh;
    overflow-x: hidden;
}

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

/* Glass Navigation */
.glass-nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    backdrop-filter: blur(20px) saturate(180%);
    background: rgba(15, 23, 42, 0.8);
    border-bottom: 1px solid var(--glass-border);
    box-shadow: 0 4px 30px var(--glass-shadow);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 1rem 2rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.logo {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--text-primary);
}

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

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

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

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--primary);
    transition: width 0.3s var(--transition);
    border-radius: var(--radius-full);
}

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

.nav-links a:hover::after,
.nav-links a.active::after {
    width: 100%;
}

.cta-button,
.primary-button,
.secondary-button {
    padding: 0.75rem 1.5rem;
    border: none;
    border-radius: var(--radius-2xl);
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s var(--transition);
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 1rem;
}

.cta-button,
.primary-button {
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    color: white;
    box-shadow: 0 4px 20px rgba(59, 130, 246, 0.3);
}

.cta-button:hover,
.primary-button:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 30px rgba(59, 130, 246, 0.4);
}

.secondary-button {
    backdrop-filter: blur(20px);
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    color: var(--text-primary);
}

.secondary-button:hover {
    background: rgba(255, 255, 255, 0.1);
    border-color: rgba(255, 255, 255, 0.2);
    transform: translateY(-2px);
}

.primary-button.large,
.secondary-button.large {
    padding: 1rem 2rem;
    font-size: 1.125rem;
}

.primary-button.full-width {
    width: 100%;
    justify-content: center;
}

/* Hero Section */
.hero {
    position: relative;
    padding: 10rem 0 6rem;
    overflow: hidden;
}

.hero-background {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: radial-gradient(circle at 20% 50%, rgba(59, 130, 246, 0.15) 0%, transparent 50%),
                radial-gradient(circle at 80% 80%, rgba(139, 92, 246, 0.15) 0%, transparent 50%);
    z-index: -1;
}

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

.badge {
    display: inline-block;
    padding: 0.5rem 1rem;
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-full);
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--primary-light);
    margin-bottom: 1.5rem;
    backdrop-filter: blur(10px);
}

.hero-title {
    font-size: 3.5rem;
    font-weight: 800;
    line-height: 1.1;
    margin-bottom: 1.5rem;
}

.gradient-text {
    background: linear-gradient(135deg, var(--primary-light), var(--secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: 1.25rem;
    color: var(--text-secondary);
    margin-bottom: 2rem;
    line-height: 1.7;
}

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

.hero-visual {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1.5rem;
}

.sensor-card {
    backdrop-filter: blur(20px) saturate(180%);
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-2xl);
    padding: 1.5rem;
    box-shadow: 0 8px 32px var(--glass-shadow);
}

.sensor-card.floating {
    animation: float 6s ease-in-out infinite;
}

.sensor-card.floating-delayed {
    animation: float 6s ease-in-out infinite 2s;
}

.sensor-card.floating-slow {
    animation: float 8s ease-in-out infinite 1s;
    grid-column: 1 / -1;
}

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

.card-header {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin-bottom: 1rem;
    font-size: 0.875rem;
    color: var(--text-secondary);
}

.status-dot {
    width: 8px;
    height: 8px;
    border-radius: var(--radius-full);
}

.status-dot.green { background: var(--success); box-shadow: 0 0 10px var(--success); }
.status-dot.orange { background: var(--warning); box-shadow: 0 0 10px var(--warning); }
.status-dot.blue { background: var(--accent); box-shadow: 0 0 10px var(--accent); }

.health-score,
.alert-count,
.source-count {
    font-size: 2.5rem;
    font-weight: 800;
    color: var(--text-primary);
}

.health-label,
.alert-label,
.source-label {
    font-size: 0.875rem;
    color: var(--text-muted);
}

/* Features Section */
.features-section {
    padding: 6rem 0;
}

.section-header {
    text-align: center;
    max-width: 700px;
    margin: 0 auto 4rem;
}

.section-header h2 {
    font-size: 2.5rem;
    font-weight: 800;
    margin-bottom: 1rem;
}

.section-header p {
    font-size: 1.125rem;
    color: var(--text-secondary);
}

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

.feature-card {
    backdrop-filter: blur(20px) saturate(180%);
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-2xl);
    padding: 2rem;
    transition: all 0.3s var(--transition);
}

.feature-card:hover {
    transform: translateY(-5px);
    background: rgba(255, 255, 255, 0.08);
    border-color: rgba(255, 255, 255, 0.15);
    box-shadow: 0 12px 40px var(--glass-shadow);
}

.feature-icon {
    width: 64px;
    height: 64px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    border-radius: var(--radius-2xl);
    margin-bottom: 1.5rem;
    color: white;
}

.feature-card h3 {
    font-size: 1.5rem;
    margin-bottom: 0.75rem;
}

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

/* Stats Section */
.stats-section {
    padding: 4rem 0;
    background: var(--glass-bg);
    backdrop-filter: blur(20px);
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 2rem;
}

.stat-card {
    text-align: center;
}

.stat-number {
    font-size: 3rem;
    font-weight: 800;
    background: linear-gradient(135deg, var(--primary-light), var(--secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.stat-label {
    color: var(--text-secondary);
    font-size: 1rem;
    margin-top: 0.5rem;
}

/* CTA Section */
.cta-section {
    padding: 6rem 0;
    text-align: center;
}

.cta-content h2 {
    font-size: 2.5rem;
    font-weight: 800;
    margin-bottom: 1rem;
}

.cta-content p {
    font-size: 1.25rem;
    color: var(--text-secondary);
    margin-bottom: 2rem;
}

.cta-actions {
    display: flex;
    gap: 1rem;
    justify-content: center;
}

/* Footer */
.footer {
    padding: 4rem 0 2rem;
    border-top: 1px solid var(--glass-border);
    backdrop-filter: blur(20px);
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: 3rem;
    margin-bottom: 2rem;
}

.footer-logo {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-size: 1.25rem;
    font-weight: 700;
    margin-bottom: 1rem;
}

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

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

.footer-col h4 {
    font-size: 1rem;
    margin-bottom: 1rem;
    color: var(--text-primary);
}

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

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

.footer-col ul li a {
    color: var(--text-secondary);
    text-decoration: none;
    transition: color 0.3s var(--transition);
}

.footer-col ul li a:hover {
    color: var(--primary-light);
}

.footer-bottom {
    text-align: center;
    padding-top: 2rem;
    border-top: 1px solid var(--glass-border);
    color: var(--text-muted);
}

/* Page Header */
.page-header {
    padding: 10rem 0 4rem;
    text-align: center;
}

.page-header h1 {
    font-size: 3rem;
    font-weight: 800;
    margin-bottom: 1rem;
}

.page-header p {
    font-size: 1.25rem;
    color: var(--text-secondary);
}

/* Feature Detail */
.feature-detail {
    padding: 4rem 0;
}

.feature-detail.alt {
    background: var(--glass-bg);
    backdrop-filter: blur(20px);
}

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

.detail-grid.reverse {
    direction: rtl;
}

.detail-grid.reverse > * {
    direction: ltr;
}

.feature-badge {
    display: inline-block;
    padding: 0.5rem 1rem;
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    border-radius: var(--radius-full);
    font-size: 0.875rem;
    font-weight: 600;
    color: white;
    margin-bottom: 1rem;
}

.detail-content h2 {
    font-size: 2.5rem;
    font-weight: 800;
    margin-bottom: 1rem;
}

.lead {
    font-size: 1.25rem;
    color: var(--text-secondary);
    margin-bottom: 2rem;
}

.feature-list {
    list-style: none;
}

.feature-list li {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-bottom: 1rem;
    color: var(--text-secondary);
}

.visual-card {
    backdrop-filter: blur(20px) saturate(180%);
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-2xl);
    padding: 2rem;
    box-shadow: 0 12px 40px var(--glass-shadow);
}

.placeholder-chart {
    width: 100%;
    height: 300px;
    background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
    opacity: 0.1;
    border-radius: var(--radius-xl);
}

/* Additional Features */
.additional-features {
    padding: 6rem 0;
    text-align: center;
}

.additional-features h2 {
    font-size: 2.5rem;
    font-weight: 800;
    margin-bottom: 3rem;
}

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

.mini-feature {
    backdrop-filter: blur(20px);
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-2xl);
    padding: 1.5rem;
}

.mini-feature h3 {
    font-size: 1.25rem;
    margin-bottom: 0.5rem;
}

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

/* About Section */
.about-section {
    padding: 4rem 0;
}

.about-content {
    max-width: 800px;
    margin: 0 auto;
}

.about-content h2 {
    font-size: 2rem;
    font-weight: 800;
    margin: 3rem 0 1rem;
}

.about-content p {
    color: var(--text-secondary);
    line-height: 1.8;
    margin-bottom: 1.5rem;
}

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

.value-card {
    backdrop-filter: blur(20px);
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-2xl);
    padding: 2rem;
}

.value-card h3 {
    font-size: 1.25rem;
    margin-bottom: 0.75rem;
}

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

/* Contact Section */
.contact-section {
    padding: 4rem 0;
}

.contact-grid {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 3rem;
}

.contact-form-container {
    backdrop-filter: blur(20px);
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-2xl);
    padding: 2rem;
}

.form-group {
    margin-bottom: 1.5rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 600;
    color: var(--text-primary);
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 0.75rem 1rem;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-2xl);
    color: var(--text-primary);
    font-family: inherit;
    font-size: 1rem;
    transition: all 0.3s var(--transition);
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary);
    background: rgba(255, 255, 255, 0.08);
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
}

.contact-info h3 {
    font-size: 1.5rem;
    margin-bottom: 1.5rem;
}

.info-item {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-bottom: 1.5rem;
    color: var(--text-secondary);
}

.info-item svg {
    color: var(--primary);
}

/* Docs Section */
.docs-section {
    padding: 4rem 0;
}

.docs-grid {
    display: grid;
    grid-template-columns: 250px 1fr;
    gap: 3rem;
}

.docs-sidebar {
    position: sticky;
    top: 100px;
    height: fit-content;
}

.docs-nav {
    backdrop-filter: blur(20px);
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-2xl);
    padding: 1rem;
}

.docs-nav a {
    display: block;
    padding: 0.75rem 1rem;
    color: var(--text-secondary);
    text-decoration: none;
    border-radius: var(--radius-xl);
    transition: all 0.3s var(--transition);
    margin-bottom: 0.25rem;
}

.docs-nav a:hover,
.docs-nav a.active {
    background: rgba(59, 130, 246, 0.1);
    color: var(--primary-light);
}

.docs-content section {
    margin-bottom: 4rem;
}

.docs-content h2 {
    font-size: 2rem;
    font-weight: 800;
    margin-bottom: 1rem;
}

.docs-content h3 {
    font-size: 1.5rem;
    font-weight: 700;
    margin: 2rem 0 1rem;
}

.docs-content p {
    color: var(--text-secondary);
    line-height: 1.8;
    margin-bottom: 1rem;
}

.docs-content ul {
    list-style: none;
    padding-left: 0;
}

.docs-content ul li {
    padding: 0.5rem 0;
    color: var(--text-secondary);
}

.code-block {
    backdrop-filter: blur(20px);
    background: rgba(0, 0, 0, 0.3);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-2xl);
    padding: 1.5rem;
    margin: 1rem 0;
    overflow-x: auto;
}

.code-block code {
    font-family: 'Monaco', 'Courier New', monospace;
    color: var(--accent);
    white-space: pre;
}

.integration-list {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1.5rem;
    margin-top: 2rem;
}

.integration-item {
    backdrop-filter: blur(20px);
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-2xl);
    padding: 1.5rem;
}

.integration-item h4 {
    font-size: 1.125rem;
    margin-bottom: 0.5rem;
}

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

/* Responsive Design */
@media (max-width: 1024px) {
    .hero .container,
    .detail-grid {
        grid-template-columns: 1fr;
    }
    
    .hero-visual {
        grid-template-columns: 1fr;
    }
    
    .footer-grid {
        grid-template-columns: 1fr 1fr;
    }
    
    .docs-grid {
        grid-template-columns: 1fr;
    }
    
    .docs-sidebar {
        position: static;
    }
    
    .contact-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 768px) {
    .nav-links {
        display: none;
    }
    
    .hero-title {
        font-size: 2.5rem;
    }
    
    .hero-subtitle {
        font-size: 1rem;
    }
    
    .hero-actions {
        flex-direction: column;
    }
    
    .section-header h2 {
        font-size: 2rem;
    }
    
    .features-grid {
        grid-template-columns: 1fr;
    }
    
    .footer-grid {
        grid-template-columns: 1fr;
    }
    
    .cta-actions {
        flex-direction: column;
        align-items: stretch;
    }
}