/* CSS Custom Properties for Easy Theme Management */
:root {
    --primary-color: #2E8B57; /* Sea Green - represents growth and blockchain */
    --secondary-color: #4682B4; /* Steel Blue - technology feel */
    --accent-color: #FFD700; /* Gold - value and premium */
    --background-color: #F8F9FA;
    --text-color: #2C3E50;
    --text-light: #6C757D;
    --white: #FFFFFF;
    --border-color: #E9ECEF;
    --shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    --gradient: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    
    /* Typography */
    --font-primary: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    --font-mono: 'Courier New', monospace;
    
    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 2rem;
    --spacing-lg: 3rem;
    --spacing-xl: 4rem;
}

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

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

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

/* Header */
header {
    background: var(--gradient);
    color: var(--white);
    padding: var(--spacing-sm) 0;
    box-shadow: var(--shadow);
    position: sticky;
    top: 0;
    z-index: 100;
}

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

.logo {
    font-size: 1.8rem;
    font-weight: bold;
    text-decoration: none;
    color: var(--white);
}

.nav-links {
    display: flex;
    list-style: none;
    gap: var(--spacing-md);
}

.nav-links a {
    color: var(--white);
    text-decoration: none;
    transition: opacity 0.3s ease;
}

.nav-links a:hover {
    opacity: 0.8;
}

/* Mobile Menu */
.mobile-menu-toggle {
    display: none;
    background: none;
    border: none;
    color: var(--white);
    font-size: 1.5rem;
    cursor: pointer;
}

/* Hero Section */
.hero {
    background: var(--gradient);
    color: var(--white);
    padding: var(--spacing-xl) 0;
    text-align: center;
}

.hero h1 {
    font-size: 3rem;
    margin-bottom: var(--spacing-sm);
    text-shadow: 2px 2px 4px rgba(0,0,0,0.3);
}

.hero p {
    font-size: 1.3rem;
    margin-bottom: var(--spacing-md);
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

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

.btn {
    display: inline-block;
    padding: 12px 24px;
    border: none;
    border-radius: 6px;
    text-decoration: none;
    font-weight: 600;
    transition: all 0.3s ease;
    cursor: pointer;
}

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

.btn-secondary {
    background-color: transparent;
    color: var(--white);
    border: 2px solid var(--white);
}

.btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 12px rgba(0,0,0,0.2);
}

/* Main Content */
main {
    padding: var(--spacing-xl) 0;
}

.section {
    margin-bottom: var(--spacing-xl);
}

.section h2 {
    font-size: 2.5rem;
    margin-bottom: var(--spacing-md);
    text-align: center;
    color: var(--primary-color);
}

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

.feature-card {
    background: var(--white);
    padding: var(--spacing-md);
    border-radius: 12px;
    box-shadow: var(--shadow);
    text-align: center;
    transition: transform 0.3s ease;
}

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

.feature-icon {
    font-size: 3rem;
    margin-bottom: var(--spacing-sm);
    display: block;
}

.feature-card h3 {
    color: var(--primary-color);
    margin-bottom: var(--spacing-sm);
}

/* Code Example */
.code-example {
    background: var(--white);
    border-radius: 12px;
    padding: var(--spacing-md);
    box-shadow: var(--shadow);
    margin: var(--spacing-md) 0;
}

.code-example h3 {
    color: var(--primary-color);
    margin-bottom: var(--spacing-sm);
}

pre {
    background: #f8f9fa;
    border: 1px solid var(--border-color);
    border-radius: 6px;
    padding: var(--spacing-sm);
    overflow-x: auto;
    font-family: var(--font-mono);
    font-size: 0.9rem;
}

/* Status Banner */
.status-banner {
    background: linear-gradient(45deg, #ff6b35, #f7931e);
    color: var(--white);
    padding: var(--spacing-sm);
    text-align: center;
    font-weight: 600;
    margin-bottom: var(--spacing-md);
}

/* Quick Links */
.quick-links {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-sm);
    margin: var(--spacing-md) 0;
}

.quick-link {
    background: var(--white);
    padding: var(--spacing-sm);
    border-radius: 8px;
    box-shadow: var(--shadow);
    text-align: center;
    text-decoration: none;
    color: var(--text-color);
    transition: all 0.3s ease;
}

.quick-link:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 12px rgba(0,0,0,0.15);
}

/* Footer */
footer {
    background: var(--text-color);
    color: var(--white);
    padding: var(--spacing-lg) 0 var(--spacing-md);
    margin-top: var(--spacing-xl);
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-md);
}

.footer-section h4 {
    color: var(--accent-color);
    margin-bottom: var(--spacing-sm);
}

.footer-section a {
    color: var(--white);
    text-decoration: none;
    display: block;
    margin-bottom: var(--spacing-xs);
}

.footer-section a:hover {
    color: var(--accent-color);
}

.footer-bottom {
    text-align: center;
    padding-top: var(--spacing-sm);
    border-top: 1px solid rgba(255,255,255,0.2);
    color: #adb5bd;
}

.disclaimer {
    background: #fff3cd;
    border: 1px solid #ffeaa7;
    color: #856404;
    padding: var(--spacing-sm);
    border-radius: 6px;
    margin: var(--spacing-md) 0;
    font-size: 0.9rem;
}

/* Responsive Design */
@media (max-width: 768px) {
    .mobile-menu-toggle {
        display: block;
    }
    
    .nav-links {
        display: none;
        width: 100%;
        flex-direction: column;
        gap: var(--spacing-sm);
        margin-top: var(--spacing-sm);
    }
    
    .nav-links.active {
        display: flex;
    }
    
    .hero h1 {
        font-size: 2rem;
    }
    
    .hero p {
        font-size: 1.1rem;
    }
    
    .cta-buttons {
        flex-direction: column;
        align-items: center;
    }
    
    .section h2 {
        font-size: 2rem;
    }
}