/* Dark mode (default) */
:root {
    --bg-primary: #000000;
    --bg-secondary: #0a0a0a;
    --bg-tertiary: #111111;
    --bg-card: #0f0f0f;
    --bg-card-hover: #1a1a1a;
    --text-primary: #ffffff;
    --text-secondary: #a0a0a0;
    --text-tertiary: #707070;
    --accent-primary: #6366f1;
    --accent-secondary: #8b5cf6;
    --accent-hover: #818cf8;
    --link-color: #a78bfa;
    --link-hover: #c4b5fd;
    --border-color: #1f1f1f;
    --border-hover: #2f2f2f;
    --gradient-primary: linear-gradient(135deg, #6366f1 0%, #8b5cf6 100%);
    --gradient-secondary: linear-gradient(135deg, #8b5cf6 0%, #ec4899 100%);
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.5);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 12px 32px rgba(0, 0, 0, 0.5);
    --shadow-glow: 0 0 40px rgba(99, 102, 241, 0.15);
}

/* Light mode */
[data-theme="light"] {
    --bg-primary: #ffffff;
    --bg-secondary: #fafafa;
    --bg-tertiary: #f5f5f5;
    --bg-card: #ffffff;
    --bg-card-hover: #f9f9f9;
    --text-primary: #0a0a0a;
    --text-secondary: #525252;
    --text-tertiary: #737373;
    --accent-primary: #6366f1;
    --accent-secondary: #8b5cf6;
    --accent-hover: #818cf8;
    --link-color: #7c3aed;
    --link-hover: #6d28d9;
    --border-color: #e5e5e5;
    --border-hover: #d4d4d4;
    --gradient-primary: linear-gradient(135deg, #6366f1 0%, #8b5cf6 100%);
    --gradient-secondary: linear-gradient(135deg, #8b5cf6 0%, #ec4899 100%);
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.08);
    --shadow-lg: 0 12px 32px rgba(0, 0, 0, 0.12);
    --shadow-glow: 0 0 40px rgba(99, 102, 241, 0.1);
}

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

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
    transition: background-color 0.3s ease, color 0.3s ease;
}

/* Global link styles - light violet matching logo */
a {
    color: var(--link-color);
    text-decoration: none;
    transition: color 0.2s ease;
}

a:hover {
    color: var(--link-hover);
}

/* Override for navigation and buttons that should use different colors */
.nav-links a:not(.btn-primary),
.btn,
.btn-primary,
.btn-secondary {
    color: inherit;
}

.container {
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 32px;
}

/* Navbar */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: rgba(0, 0, 0, 0.7);
    backdrop-filter: blur(20px) saturate(180%);
    -webkit-backdrop-filter: blur(20px) saturate(180%);
    border-bottom: 1px solid var(--border-color);
    z-index: 1000;
    padding: 20px 0;
    transition: all 0.3s ease;
}

[data-theme="light"] .navbar {
    background: rgba(255, 255, 255, 0.8);
}

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

.logo {
    display: flex;
    align-items: center;
    gap: 12px;
    text-decoration: none;
    color: var(--text-primary);
}

.logo-text {
    font-size: 18px;
    font-weight: 600;
    letter-spacing: -0.01em;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.nav-links {
    display: flex;
    align-items: center;
    gap: 32px;
}

.nav-links a {
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 14px;
    font-weight: 500;
    transition: color 0.2s ease;
    position: relative;
}

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

/* Theme Toggle */
.theme-toggle {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all 0.2s ease;
    padding: 0;
    color: var(--text-secondary);
}

.theme-toggle:hover {
    background: var(--bg-card-hover);
    border-color: var(--border-hover);
    color: var(--text-primary);
    transform: scale(1.05);
}

.theme-icon {
    width: 18px;
    height: 18px;
    transition: opacity 0.2s ease, transform 0.2s ease;
}

.theme-icon-light {
    display: none;
}

[data-theme="light"] .theme-icon-dark {
    display: none;
}

[data-theme="light"] .theme-icon-light {
    display: block;
}

.btn-primary {
    background: var(--gradient-primary);
    color: white;
    padding: 10px 20px;
    border-radius: 8px;
    text-decoration: none;
    font-weight: 500;
    font-size: 14px;
    transition: all 0.2s ease;
    border: none;
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    gap: 8px;
}

.btn-primary:hover {
    transform: translateY(-1px);
    box-shadow: 0 8px 24px rgba(99, 102, 241, 0.3);
}

/* Hero Section */
.hero {
    padding: 160px 0 120px;
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle, rgba(99, 102, 241, 0.08) 0%, transparent 70%);
    animation: pulse 20s ease-in-out infinite;
    pointer-events: none;
}

@keyframes pulse {
    0%, 100% { transform: scale(1); opacity: 0.5; }
    50% { transform: scale(1.1); opacity: 0.8; }
}

.hero .container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 80px;
    align-items: center;
    position: relative;
    z-index: 1;
}

.hero-content {
    display: flex;
    flex-direction: column;
    gap: 32px;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 6px 14px;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 20px;
    font-size: 13px;
    color: var(--text-secondary);
    width: fit-content;
    font-weight: 500;
}

.badge-dot {
    width: 6px;
    height: 6px;
    background: #10b981;
    border-radius: 50%;
    animation: blink 2s infinite;
}

@keyframes blink {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.3; }
}

.hero-title {
    font-size: 72px;
    font-weight: 700;
    line-height: 1.05;
    letter-spacing: -0.03em;
}

.gradient-text {
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-description {
    font-size: 20px;
    color: var(--text-secondary);
    line-height: 1.7;
    max-width: 560px;
    font-weight: 400;
}

.hero-cta {
    display: flex;
    gap: 16px;
    flex-wrap: wrap;
}

.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 14px 28px;
    border-radius: 10px;
    text-decoration: none;
    font-weight: 500;
    font-size: 15px;
    transition: all 0.2s ease;
    border: none;
    cursor: pointer;
}

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

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 12px 32px rgba(99, 102, 241, 0.4);
}

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

.btn-secondary:hover {
    background: var(--bg-card-hover);
    border-color: var(--accent-primary);
    transform: translateY(-1px);
}

.hero-stats {
    display: flex;
    gap: 48px;
    margin-top: 8px;
    padding-top: 32px;
    border-top: 1px solid var(--border-color);
}

.stat {
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.stat-value {
    font-size: 28px;
    font-weight: 700;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    letter-spacing: -0.02em;
}

.stat-label {
    font-size: 14px;
    color: var(--text-tertiary);
    font-weight: 500;
}

/* Code Block */
.hero-visual {
    position: relative;
}

.code-block {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    overflow: hidden;
    box-shadow: var(--shadow-lg);
    transition: all 0.3s ease;
}

.code-block:hover {
    box-shadow: var(--shadow-glow);
    transform: translateY(-2px);
}

.code-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 14px 18px;
    background: var(--bg-secondary);
    border-bottom: 1px solid var(--border-color);
}

.code-dots {
    display: flex;
    gap: 6px;
}

.code-dots span {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background: var(--text-tertiary);
}

.code-dots span:nth-child(1) { background: #ef4444; }
.code-dots span:nth-child(2) { background: #f59e0b; }
.code-dots span:nth-child(3) { background: #10b981; }

.code-title {
    font-size: 12px;
    color: var(--text-secondary);
    font-weight: 500;
    font-family: 'Inter', sans-serif;
}

.code-content {
    padding: 24px;
    overflow-x: auto;
}

.code-content pre {
    margin: 0;
    font-family: 'Monaco', 'Menlo', 'Ubuntu Mono', 'Consolas', monospace;
    font-size: 13px;
    line-height: 1.8;
}

.code-content code {
    color: var(--text-primary);
}

.code-comment {
    color: var(--text-tertiary);
}

.code-command {
    color: #10b981;
}

/* Features Section */
.features {
    padding: 120px 0;
    background: var(--bg-secondary);
    transition: background-color 0.3s ease;
}

.section-header {
    text-align: center;
    margin-bottom: 80px;
}

.section-header h2 {
    font-size: 56px;
    font-weight: 700;
    margin-bottom: 20px;
    letter-spacing: -0.03em;
    line-height: 1.1;
}

.section-header p {
    font-size: 20px;
    color: var(--text-secondary);
    font-weight: 400;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 32px;
}

.feature-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    padding: 40px;
    transition: all 0.3s ease;
}

.feature-card:hover {
    transform: translateY(-4px);
    border-color: var(--accent-primary);
    box-shadow: var(--shadow-glow);
    background: var(--bg-card-hover);
}

.feature-icon {
    width: 52px;
    height: 52px;
    background: var(--gradient-primary);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 24px;
    color: white;
    box-shadow: var(--shadow-md);
}

.feature-card h3 {
    font-size: 22px;
    font-weight: 600;
    margin-bottom: 16px;
    letter-spacing: -0.01em;
}

.feature-card p {
    color: var(--text-secondary);
    line-height: 1.7;
    font-size: 15px;
}

.feature-card code {
    background: var(--bg-secondary);
    padding: 3px 8px;
    border-radius: 5px;
    font-size: 0.9em;
    color: var(--accent-primary);
    font-weight: 500;
    font-family: 'Monaco', 'Menlo', monospace;
}

/* Docs Section */
.docs {
    padding: 120px 0;
    background: var(--bg-secondary);
    transition: background-color 0.3s ease;
}

.docs-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 24px;
    margin-top: 48px;
}

.docs-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    padding: 32px;
    text-decoration: none;
    color: inherit;
    transition: all 0.3s ease;
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.docs-card:hover {
    transform: translateY(-4px);
    border-color: var(--accent-primary);
    box-shadow: var(--shadow-glow);
    background: var(--bg-card-hover);
}

.docs-icon {
    font-size: 40px;
    margin-bottom: 8px;
}

.docs-card h3 {
    font-size: 22px;
    font-weight: 600;
    margin: 0;
    letter-spacing: -0.01em;
    color: var(--text-primary);
}

.docs-card p {
    color: var(--text-secondary);
    line-height: 1.6;
    font-size: 15px;
    margin: 0;
    flex-grow: 1;
}

.docs-link {
    color: var(--link-color);
    font-weight: 500;
    font-size: 14px;
    margin-top: auto;
    display: inline-flex;
    align-items: center;
    gap: 4px;
    transition: color 0.2s ease;
}

.docs-card:hover .docs-link {
    color: var(--link-hover);
}

.docs-card:hover .docs-link {
    transform: translateX(4px);
}

.docs-footer {
    margin-top: 64px;
    text-align: center;
    padding-top: 32px;
    border-top: 1px solid var(--border-color);
    color: var(--text-secondary);
    font-size: 14px;
}

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

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

/* Architecture Section */
.architecture {
    padding: 120px 0;
    transition: background-color 0.3s ease;
}

.architecture-diagram {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 48px;
    margin-top: 80px;
}

.arch-node {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    padding: 32px;
    min-width: 220px;
    text-align: center;
    transition: all 0.3s ease;
}

.arch-node:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-md);
}

.arch-controller {
    border-color: var(--accent-primary);
    box-shadow: var(--shadow-glow);
}

.arch-node-header {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 12px;
    margin-bottom: 20px;
}

.arch-node-icon {
    font-size: 36px;
}

.arch-node h3 {
    font-size: 20px;
    font-weight: 600;
    letter-spacing: -0.01em;
}

.arch-node p {
    color: var(--text-secondary);
    font-size: 15px;
    margin: 6px 0;
}

.arch-node-detail {
    color: var(--text-tertiary) !important;
    font-size: 13px !important;
}

.arch-node-port {
    margin-top: 16px;
    padding: 8px 16px;
    background: var(--bg-secondary);
    border-radius: 8px;
    font-size: 13px;
    color: var(--text-tertiary);
    display: inline-block;
    font-weight: 500;
}

.arch-connection {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 12px;
}

.arch-line {
    width: 2px;
    height: 48px;
    background: var(--gradient-primary);
    border-radius: 2px;
}

.arch-label {
    font-size: 13px;
    color: var(--text-tertiary);
    padding: 6px 14px;
    background: var(--bg-secondary);
    border-radius: 8px;
    font-weight: 500;
}

.arch-nodes {
    display: flex;
    gap: 32px;
    flex-wrap: wrap;
    justify-content: center;
}

/* License Section */
.license {
    padding: 120px 0;
    background: var(--bg-secondary);
    transition: background-color 0.3s ease;
}

.license-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 32px;
    margin-top: 48px;
}

.license-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    padding: 40px;
    transition: all 0.3s ease;
}

.license-card:hover {
    transform: translateY(-4px);
    border-color: var(--accent-primary);
    box-shadow: var(--shadow-md);
}

.license-icon {
    font-size: 48px;
    margin-bottom: 20px;
}

.license-card h3 {
    font-size: 24px;
    font-weight: 600;
    margin-bottom: 20px;
    letter-spacing: -0.01em;
}

.license-card ul {
    list-style: none;
    padding: 0;
    margin: 0;
}

.license-card li {
    padding: 8px 0;
    color: var(--text-secondary);
    position: relative;
    padding-left: 24px;
}

.license-card li::before {
    content: "•";
    position: absolute;
    left: 0;
    color: var(--accent-primary);
    font-weight: bold;
}

.license-note {
    margin-top: 20px;
    padding-top: 20px;
    border-top: 1px solid var(--border-color);
    color: var(--text-secondary);
    font-size: 14px;
}

.license-note a {
    color: var(--link-color);
    text-decoration: none;
}

.license-note a:hover {
    color: var(--link-hover);
    text-decoration: underline;
}

.license-details {
    margin-top: 64px;
    padding: 40px;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    text-align: center;
}

.license-details p {
    color: var(--text-secondary);
    line-height: 1.8;
    font-size: 16px;
    margin-bottom: 16px;
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
}

.license-details strong {
    color: var(--text-primary);
    font-weight: 600;
}

.license-links {
    display: flex;
    gap: 16px;
    justify-content: center;
    flex-wrap: wrap;
    margin-top: 32px;
}

.footer-license {
    margin-top: 16px;
    font-size: 12px;
    color: var(--text-tertiary);
}

.footer-license a {
    color: var(--link-color);
    text-decoration: none;
}

.footer-license a:hover {
    color: var(--link-hover);
    text-decoration: underline;
}

/* CTA Section */
.cta {
    padding: 120px 0;
    background: var(--bg-primary);
    text-align: center;
    transition: background-color 0.3s ease;
}

.cta-content h2 {
    font-size: 56px;
    font-weight: 700;
    margin-bottom: 20px;
    letter-spacing: -0.03em;
    line-height: 1.1;
}

.cta-content p {
    font-size: 20px;
    color: var(--text-secondary);
    margin-bottom: 40px;
    font-weight: 400;
}

.cta-buttons {
    display: flex;
    gap: 16px;
    justify-content: center;
    flex-wrap: wrap;
}

/* Footer */
.footer {
    padding: 80px 0 32px;
    border-top: 1px solid var(--border-color);
    transition: border-color 0.3s ease;
}

.footer-content {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr;
    gap: 64px;
    margin-bottom: 64px;
}

.footer-brand p {
    color: var(--text-secondary);
    margin-top: 16px;
    font-size: 14px;
}

.footer-column h4 {
    font-size: 14px;
    font-weight: 600;
    margin-bottom: 20px;
    color: var(--text-primary);
    letter-spacing: 0.01em;
}

.footer-column a {
    display: block;
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 14px;
    margin-bottom: 12px;
    transition: color 0.2s ease;
}

.footer-column a:hover {
    color: var(--link-color);
}

.footer-bottom {
    padding-top: 32px;
    border-top: 1px solid var(--border-color);
    text-align: center;
    color: var(--text-tertiary);
    font-size: 14px;
    transition: border-color 0.3s ease;
}

/* Responsive */
@media (max-width: 968px) {
    .container {
        padding: 0 24px;
    }
    
    .hero .container {
        grid-template-columns: 1fr;
        gap: 60px;
    }
    
    .hero-title {
        font-size: 56px;
    }
    
    .hero-stats {
        flex-direction: column;
        gap: 24px;
        align-items: flex-start;
    }
    
    .nav-links {
        gap: 20px;
    }
    
    .nav-links a:not(.btn-primary):not(.theme-toggle) {
        display: none;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
        gap: 48px;
    }
    
    .architecture-diagram {
        gap: 32px;
    }
    
    .arch-nodes {
        flex-direction: column;
        align-items: center;
    }
    
    .section-header h2,
    .cta-content h2 {
        font-size: 42px;
    }
}

@media (max-width: 640px) {
    .hero {
        padding: 140px 0 80px;
    }
    
    .hero-title {
        font-size: 42px;
    }
    
    .hero-description {
        font-size: 18px;
    }
    
    .section-header h2,
    .cta-content h2 {
        font-size: 36px;
    }
    
    .section-header p,
    .cta-content p {
        font-size: 18px;
    }
    
    .features-grid {
        grid-template-columns: 1fr;
        gap: 24px;
    }
    
    .feature-card {
        padding: 32px;
    }
    
    .features,
    .architecture,
    .license,
    .cta {
        padding: 80px 0;
    }
    
    .license-content {
        grid-template-columns: 1fr;
        gap: 24px;
    }
    
    .license-card {
        padding: 32px;
    }
    
    .license-details {
        padding: 32px 24px;
    }
    
    .license-links {
        flex-direction: column;
        align-items: stretch;
    }
    
    .license-links .btn {
        width: 100%;
        justify-content: center;
    }
}