:root {
    --color-bg: #0d1117;
    --color-bg-secondary: #161b22;
    --color-bg-tertiary: #21262d;
    --color-text: #c9d1d9;
    --color-text-secondary: #8b949e;
    --color-border: #30363d;
    --color-accent: #58a6ff;
    --color-accent-light: #79c0ff;
    --color-success: #238636;
    --color-success-light: #3fb950;
    --color-warning: #d29922;
    --color-error: #da3633;
    --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    --font-mono: 'JetBrains Mono', monospace;
    --radius: 8px;
    --transition: all 0.2s ease;
}

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

body {
    font-family: var(--font-sans);
    background: var(--color-bg);
    color: var(--color-text);
    line-height: 1.6;
}

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

/* Navbar */
.navbar {
    background: rgba(13, 17, 23, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--color-border);
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
}

.navbar .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 64px;
}

.logo {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    text-decoration: none;
    color: var(--color-text);
    font-weight: 600;
    font-size: 1.25rem;
}

.logo-icon {
    font-size: 1.5rem;
}

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

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

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

.github-link {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

/* Hero */
.hero {
    padding: 8rem 0 4rem;
    background: linear-gradient(135deg, var(--color-bg) 0%, var(--color-bg-secondary) 100%);
    border-bottom: 1px solid var(--color-border);
}

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

.hero h1 {
    font-size: 3.5rem;
    font-weight: 700;
    line-height: 1.1;
    margin-bottom: 1rem;
    background: linear-gradient(135deg, var(--color-accent) 0%, var(--color-accent-light) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: 1.5rem;
    color: var(--color-text);
    font-weight: 500;
    margin-bottom: 1rem;
}

.hero-description {
    font-size: 1.125rem;
    color: var(--color-text-secondary);
    margin-bottom: 2rem;
}

.hero-stats {
    display: flex;
    gap: 3rem;
    margin-bottom: 2rem;
}

.stat {
    text-align: center;
}

.stat-number {
    display: block;
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--color-accent);
}

.stat-label {
    font-size: 0.875rem;
    color: var(--color-text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

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

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.75rem 1.5rem;
    border-radius: var(--radius);
    font-weight: 600;
    text-decoration: none;
    transition: var(--transition);
    border: 1px solid transparent;
    cursor: pointer;
}

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

.btn-primary:hover {
    background: var(--color-accent-light);
}

.btn-secondary {
    background: var(--color-bg-tertiary);
    color: var(--color-text);
    border-color: var(--color-border);
}

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

.btn-outline {
    background: transparent;
    color: var(--color-accent);
    border-color: var(--color-accent);
}

.btn-outline:hover {
    background: var(--color-accent);
    color: var(--color-bg);
}

.btn-large {
    padding: 1rem 2rem;
    font-size: 1.125rem;
}

/* Hero Visual */
.palace-preview {
    background: var(--color-bg-tertiary);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    padding: 2rem;
}

.locus {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 1rem;
    background: var(--color-bg-secondary);
    border-radius: var(--radius);
    margin-bottom: 1rem;
}

.locus.active {
    border: 1px solid var(--color-accent);
}

.locus-icon {
    font-size: 1.5rem;
}

.locus-name {
    font-weight: 600;
}

.memory-chain {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    padding-left: 2rem;
}

.memory {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.5rem 1rem;
    background: var(--color-bg);
    border-radius: var(--radius);
    border: 1px solid var(--color-border);
}

.memory-icon {
    font-size: 1.25rem;
}

/* Empty State */
.palace-preview.empty {
    min-height: 200px;
    display: flex;
    flex-direction: column;
}

.empty-state {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 2rem;
    gap: 0.75rem;
    flex: 1;
    text-align: center;
}

.empty-icon {
    font-size: 2.5rem;
    opacity: 0.5;
}

.empty-text {
    color: var(--color-text-secondary);
    font-size: 0.9375rem;
}

.empty-command {
    font-family: var(--font-mono);
    font-size: 0.8rem;
    background: var(--color-bg);
    padding: 0.5rem 1rem;
    border-radius: var(--radius);
    border: 1px solid var(--color-border);
    color: var(--color-accent);
    margin-top: 0.5rem;
}

/* Installation Section */
.install-steps {
    max-width: 600px;
    margin: 3rem auto;
}

.install-step {
    display: flex;
    gap: 1.5rem;
    align-items: flex-start;
    padding: 1.5rem;
    background: var(--color-bg);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    margin-bottom: 1rem;
}

.install-step .step-number {
    width: 2.5rem;
    height: 2.5rem;
    background: var(--color-accent);
    color: var(--color-bg);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 1.25rem;
    flex-shrink: 0;
}

.install-step .step-content {
    flex: 1;
}

.install-step h4 {
    font-size: 1.125rem;
    margin-bottom: 0.5rem;
}

.install-step code {
    display: block;
    font-family: var(--font-mono);
    font-size: 0.875rem;
    background: var(--color-bg-secondary);
    padding: 0.75rem 1rem;
    border-radius: var(--radius);
    border: 1px solid var(--color-border);
    color: var(--color-text);
    overflow-x: auto;
}

.install-note {
    text-align: center;
    padding: 1rem;
    background: rgba(88, 166, 255, 0.1);
    border: 1px solid var(--color-accent);
    border-radius: var(--radius);
    max-width: 600px;
    margin: 2rem auto 0;
    font-size: 0.9375rem;
}

.install-note code {
    font-family: var(--font-mono);
    background: var(--color-bg);
    padding: 0.25rem 0.5rem;
    border-radius: 4px;
}

/* Sections */
.section {
    padding: 5rem 0;
}

.section-dark {
    background: var(--color-bg-secondary);
    border-top: 1px solid var(--color-border);
    border-bottom: 1px solid var(--color-border);
}

.section h2 {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 1rem;
    text-align: center;
}

.section-intro {
    text-align: center;
    color: var(--color-text-secondary);
    font-size: 1.125rem;
    margin-bottom: 3rem;
}

/* Feature Grid */
.feature-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    margin-top: 3rem;
}

.feature-card {
    background: var(--color-bg-tertiary);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    padding: 2rem;
    transition: var(--transition);
}

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

.feature-icon {
    font-size: 2.5rem;
    margin-bottom: 1rem;
}

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

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

/* Feature List */
.feature-list {
    display: grid;
    gap: 2rem;
    margin-top: 3rem;
}

.feature-item {
    display: flex;
    gap: 2rem;
    align-items: flex-start;
}

.feature-number {
    font-family: var(--font-mono);
    font-size: 2rem;
    font-weight: 700;
    color: var(--color-accent);
    opacity: 0.5;
    min-width: 3rem;
}

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

.feature-content p {
    color: var(--color-text-secondary);
}

/* Evolution Timeline */
.evolution-timeline {
    max-width: 800px;
    margin: 3rem auto 0;
}

.evolution-item {
    display: flex;
    gap: 1.5rem;
    padding: 1.5rem;
    background: var(--color-bg);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    margin-bottom: 1rem;
    align-items: flex-start;
}

.evolution-marker {
    width: 2rem;
    height: 2rem;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    flex-shrink: 0;
}

.evolution-item.accepted .evolution-marker {
    background: var(--color-success);
    color: white;
}

.evolution-item.rejected .evolution-marker {
    background: var(--color-error);
    color: white;
}

.evolution-item.hybrid .evolution-marker {
    background: var(--color-warning);
    color: white;
}

.evolution-content h4 {
    font-size: 1.125rem;
    margin-bottom: 0.25rem;
}

.evolution-content p {
    color: var(--color-text-secondary);
    font-size: 0.9375rem;
    margin-bottom: 0.5rem;
}

.evolution-badge {
    display: inline-block;
    padding: 0.25rem 0.75rem;
    border-radius: 100px;
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
}

.evolution-badge.accepted {
    background: rgba(35, 134, 54, 0.2);
    color: var(--color-success-light);
}

.evolution-badge.rejected {
    background: rgba(218, 54, 51, 0.2);
    color: var(--color-error);
}

.evolution-badge.hybrid {
    background: rgba(210, 153, 34, 0.2);
    color: var(--color-warning);
}

/* CTA Section */
.cta-section {
    background: linear-gradient(135deg, var(--color-bg-secondary) 0%, var(--color-bg) 100%);
    text-align: center;
}

.cta-section h2 {
    margin-bottom: 1rem;
}

.cta-section p {
    color: var(--color-text-secondary);
    font-size: 1.125rem;
    margin-bottom: 2rem;
}

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

/* Footer */
.footer {
    background: var(--color-bg-secondary);
    border-top: 1px solid var(--color-border);
    padding: 3rem 0 1.5rem;
}

.footer-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 2rem;
}

.footer-brand {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-weight: 600;
}

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

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

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

.footer-bottom {
    text-align: center;
    padding-top: 1.5rem;
    border-top: 1px solid var(--color-border);
    color: var(--color-text-secondary);
    font-size: 0.875rem;
}

/* Utilities */
.text-center {
    text-align: center;
}

.mt-4 {
    margin-top: 2rem;
}

/* Responsive */
@media (max-width: 768px) {
    .hero .container {
        grid-template-columns: 1fr;
    }
    
    .hero h1 {
        font-size: 2.5rem;
    }
    
    .hero-stats {
        gap: 1.5rem;
    }
    
    .nav-links {
        display: none;
    }
    
    .feature-grid {
        grid-template-columns: 1fr;
    }
    
    .feature-item {
        flex-direction: column;
        gap: 1rem;
    }
    
    .cta-buttons {
        flex-direction: column;
    }
}