/* CSS Variables */
:root {
    /* Light mode colors */
    --bg-primary: #ffffff;
    --bg-secondary: #f8f9fa;
    --bg-tertiary: #e9ecef;
    --text-primary: #212529;
    --text-secondary: #495057;
    --text-tertiary: #6c757d;
    --border-color: #dee2e6;
    
    /* Green palette from logo */
    --green-primary: #0d8064;
    --green-dark: #0a5c4a;
    --green-light: #10a37f;
    --green-lighter: #e6f7f1;
    
    /* Accent colors */
    --accent-hover: #0a5c4a;
    --shadow-sm: rgba(0, 0, 0, 0.05);
    --shadow-md: rgba(0, 0, 0, 0.1);
    
    /* Spacing */
    --space-xs: 0.25rem;
    --space-sm: 0.5rem;
    --space-md: 1rem;
    --space-lg: 1.5rem;
    --space-xl: 2rem;
    --space-2xl: 3rem;
    --space-3xl: 4rem;
}

/* Dark mode */
[data-theme="dark"] {
    --bg-primary: #0d1117;
    --bg-secondary: #161b22;
    --bg-tertiary: #21262d;
    --text-primary: #f0f6fc;
    --text-secondary: #c9d1d9;
    --text-tertiary: #8b949e;
    --border-color: #30363d;
    --green-lighter: #0d2620;
    --shadow-sm: rgba(0, 0, 0, 0.3);
    --shadow-md: rgba(0, 0, 0, 0.5);
}

/* Reset and base styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    font-size: 16px;
    line-height: 1.6;
    color: var(--text-primary);
    background-color: var(--bg-primary);
    transition: background-color 0.3s ease, color 0.3s ease;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--space-lg);
}

/* Navigation */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background-color: var(--bg-primary);
    border-bottom: 1px solid var(--border-color);
    z-index: 1000;
    backdrop-filter: blur(10px);
    background-color: rgba(var(--bg-primary), 0.9);
}

.nav-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--space-md) 0;
}

.nav-brand {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    text-decoration: none;
    color: var(--text-primary);
}

.logo {
    height: 36px;
    width: auto;
}

.brand-name {
    font-size: 1.25rem;
    font-weight: 600;
}

.nav-links {
    display: flex;
    align-items: center;
    gap: var(--space-xl);
}

.nav-link {
    text-decoration: none;
    color: var(--text-secondary);
    font-weight: 500;
    transition: color 0.2s ease;
}

.nav-link:hover {
    color: var(--green-primary);
}

.github-link {
    display: flex;
    align-items: center;
    gap: var(--space-xs);
}

.github-icon {
    width: 20px;
    height: 20px;
    fill: currentColor;
}

/* Theme toggle */
.theme-toggle {
    background: none;
    border: none;
    cursor: pointer;
    padding: var(--space-sm);
    border-radius: 8px;
    transition: background-color 0.2s ease;
}

.theme-toggle:hover {
    background-color: var(--bg-secondary);
}

.theme-toggle svg {
    width: 20px;
    height: 20px;
    fill: var(--text-secondary);
}

.sun-icon { display: block; }
.moon-icon { display: none; }

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

/* Hero Section */
.hero {
    padding: calc(80px + var(--space-3xl)) 0 var(--space-3xl);
    background-color: var(--bg-primary);
}

.hero-content {
    text-align: center;
    max-width: 900px;
    margin: 0 auto;
}

.hero-title {
    font-size: clamp(1.75rem, 3.5vw, 2.75rem);
    font-weight: 700;
    margin-bottom: var(--space-2xl);
    padding: var(--space-xl) 0;
    background: linear-gradient(135deg, var(--text-primary) 0%, var(--green-primary) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: 1.25rem;
    color: var(--text-secondary);
    margin-bottom: var(--space-xl);
    line-height: 1.8;
}

.hero-badges {
    display: flex;
    justify-content: center;
    gap: var(--space-md);
    margin-bottom: var(--space-xl);
}

.badge {
    background-color: var(--green-lighter);
    color: var(--green-dark);
    padding: var(--space-xs) var(--space-md);
    border-radius: 20px;
    font-size: 0.875rem;
    font-weight: 500;
}

.hero-actions {
    display: flex;
    justify-content: center;
    gap: var(--space-md);
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    gap: var(--space-sm);
    padding: var(--space-md) var(--space-xl);
    border-radius: 8px;
    text-decoration: none;
    font-weight: 600;
    transition: all 0.2s ease;
}

.btn-icon {
    width: 20px;
    height: 20px;
    fill: currentColor;
}

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

.btn-primary:hover {
    background-color: var(--green-dark);
    transform: translateY(-2px);
}

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

.btn-secondary:hover {
    background-color: var(--bg-tertiary);
    transform: translateY(-2px);
}

/* Sections */
.section-title {
    font-size: 2.5rem;
    font-weight: 700;
    text-align: center;
    margin-bottom: var(--space-2xl);
}

/* Value Proposition */
.value-prop {
    padding: var(--space-3xl) 0;
    background-color: var(--bg-secondary);
}

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

.feature-card {
    background-color: var(--bg-primary);
    padding: var(--space-xl);
    border-radius: 12px;
    box-shadow: 0 2px 8px var(--shadow-sm);
    transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.feature-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 4px 16px var(--shadow-md);
}

.feature-icon {
    font-size: 2.5rem;
    margin-bottom: var(--space-md);
}

.feature-card h3 {
    font-size: 1.25rem;
    margin-bottom: var(--space-sm);
    color: var(--text-primary);
}

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

/* API Compatibility Section */
.api-compat {
    padding: var(--space-3xl) 0;
    background-color: var(--bg-primary);
}

.section-subtitle {
    text-align: center;
    font-size: 1.125rem;
    color: var(--text-secondary);
    margin-bottom: var(--space-2xl);
    max-width: 700px;
    margin-left: auto;
    margin-right: auto;
}

.api-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--space-lg);
    max-width: 900px;
    margin: 0 auto;
}

.api-item {
    display: flex;
    align-items: center;
    gap: var(--space-md);
    padding: var(--space-md);
    background-color: var(--bg-secondary);
    border-radius: 8px;
    border: 1px solid var(--border-color);
}

.api-item code {
    font-weight: 600;
    color: var(--green-primary);
    background: none;
    padding: 0;
}

.api-item span {
    color: var(--text-secondary);
    font-size: 0.875rem;
}

/* Features Section */
.features {
    padding: var(--space-3xl) 0;
    background-color: var(--bg-secondary);
}

.feature-columns {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--space-2xl);
}

.feature-column h3 {
    font-size: 1.5rem;
    margin-bottom: var(--space-md);
    color: var(--green-primary);
}

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

.feature-column li {
    padding: var(--space-sm) 0;
    color: var(--text-secondary);
    position: relative;
    padding-left: var(--space-lg);
}

.feature-column li:before {
    content: "✓";
    position: absolute;
    left: 0;
    color: var(--green-primary);
    font-weight: bold;
}

/* Use Cases */
.use-cases {
    padding: var(--space-3xl) 0;
    background-color: var(--bg-primary);
}

.use-case-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--space-xl);
}

.use-case-card {
    background-color: var(--bg-secondary);
    padding: var(--space-xl);
    border-radius: 12px;
    border: 1px solid var(--border-color);
}

.use-case-card h3 {
    font-size: 1.25rem;
    margin-bottom: var(--space-sm);
    color: var(--green-primary);
}

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

/* Get Started */
.get-started {
    padding: var(--space-3xl) 0;
    background-color: var(--bg-secondary);
}

.install-options {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
    gap: var(--space-xl);
    margin-bottom: var(--space-2xl);
}

.install-option h3 {
    font-size: 1.25rem;
    margin-bottom: var(--space-md);
}

pre {
    background-color: var(--bg-tertiary);
    padding: var(--space-lg);
    border-radius: 8px;
    overflow-x: auto;
}

code {
    font-family: 'Consolas', 'Monaco', 'Courier New', monospace;
    font-size: 0.875rem;
    color: var(--text-primary);
}

.cta-section {
    text-align: center;
    padding: var(--space-xl);
    background-color: var(--green-lighter);
    border-radius: 12px;
}

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

.cta-buttons {
    display: flex;
    justify-content: center;
    gap: var(--space-md);
    flex-wrap: wrap;
}

/* Footer */
.footer {
    background-color: var(--bg-tertiary);
    padding: var(--space-2xl) 0 var(--space-lg);
    margin-top: var(--space-3xl);
}

.footer-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--space-xl);
}

.footer-info {
    display: flex;
    align-items: center;
    gap: var(--space-lg);
}

.footer-logo {
    height: 48px;
    width: auto;
}

.footer-links {
    display: flex;
    gap: var(--space-xl);
}

.footer-links a {
    color: var(--text-secondary);
    text-decoration: none;
    transition: color 0.2s ease;
}

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

.footer-bottom {
    text-align: center;
    padding-top: var(--space-lg);
    border-top: 1px solid var(--border-color);
    color: var(--text-tertiary);
}

/* Responsive */
@media (max-width: 768px) {
    .hero-title {
        font-size: 2rem;
        white-space: normal;
        line-height: 1.2;
    }
    
    .section-title {
        font-size: 1.75rem;
    }
    
    .nav-links {
        gap: var(--space-md);
    }
    
    .nav-link:not(.github-link):not(:last-child) {
        display: none;
    }
    
    .hero-actions {
        flex-direction: column;
        align-items: center;
    }
    
    .footer-content {
        flex-direction: column;
        gap: var(--space-xl);
    }
    
    .install-options {
        grid-template-columns: 1fr;
    }
}