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

:root {
    --primary: #667eea;
    --primary-dark: #764ba2;
    --dark: #1a1a2e;
    --light: #f5f5f5;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    line-height: 1.6;
    color: #333;
    background: var(--light);
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* Navbar */
.navbar {
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
    color: white;
    padding: 1rem 0;
    position: fixed;
    width: 100%;
    top: 0;
    z-index: 1000;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
}

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

.nav-brand h1 {
    margin: 0;
    font-size: 1.8rem;
}

.tagline {
    font-size: 0.9rem;
    opacity: 0.9;
}

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

.nav-menu a {
    color: white;
    text-decoration: none;
    font-weight: 500;
    transition: opacity 0.3s;
}

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

/* Hero Section */
.hero {
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
    color: white;
    padding: 150px 0 100px;
    text-align: center;
    margin-top: 60px;
}

.hero-title {
    font-size: 3.5rem;
    margin-bottom: 1rem;
    animation: fadeInUp 0.8s;
}

.hero-subtitle {
    font-size: 1.5rem;
    margin-bottom: 2rem;
    opacity: 0.9;
    animation: fadeInUp 0.8s 0.2s backwards;
}

.hero-buttons {
    display: flex;
    gap: 1rem;
    justify-content: center;
    animation: fadeInUp 0.8s 0.4s backwards;
    flex-wrap: wrap;
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Buttons */
.btn {
    padding: 12px 30px;
    border-radius: 8px;
    text-decoration: none;
    font-weight: 600;
    transition: all 0.3s;
    display: inline-block;
}

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

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(0,0,0,0.2);
}

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

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

/* Quick Start Section */
.quick-start {
    padding: 80px 0;
    background: white;
}

.quick-start h2 {
    text-align: center;
    font-size: 2.5rem;
    margin-bottom: 2rem;
    color: var(--dark);
}

.installation-box {
    background: var(--light);
    padding: 2rem;
    border-radius: 12px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
    max-width: 800px;
    margin: 0 auto;
}

.installation-box h3 {
    color: var(--primary);
    margin-bottom: 1rem;
}

.installation-box pre {
    background: var(--dark);
    color: #00ff00;
    padding: 1.5rem;
    border-radius: 8px;
    overflow-x: auto;
}

.installation-box code {
    font-family: 'Courier New', monospace;
    font-size: 0.9rem;
}

/* Contribute Section */
.contribute {
    padding: 80px 0;
    background: var(--light);
    text-align: center;
}

.contribute h2 {
    font-size: 2.5rem;
    margin-bottom: 1rem;
    color: var(--dark);
}

.contribute > p {
    font-size: 1.2rem;
    color: #666;
    margin-bottom: 3rem;
}

.contribute-steps {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    margin-bottom: 3rem;
}

.step {
    background: white;
    padding: 2rem;
    border-radius: 12px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
}

.step-number {
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
    color: white;
    width: 50px;
    height: 50px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    font-weight: bold;
    margin: 0 auto 1rem;
}

/* Footer */
footer {
    background: var(--dark);
    color: white;
    padding: 2rem 0;
    text-align: center;
}

.social-links {
    margin-top: 1rem;
    display: flex;
    gap: 2rem;
    justify-content: center;
}

.social-links a {
    color: white;
    text-decoration: none;
    transition: opacity 0.3s;
}

.social-links a:hover {
    opacity: 0.7;
}

/* Responsive */
@media (max-width: 768px) {
    .hero-title {
        font-size: 2.5rem;
    }
    
    .nav-menu {
        gap: 1rem;
        font-size: 0.9rem;
    }
    
    .hero-buttons {
        flex-direction: column;
    }
}