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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    line-height: 1.8;
    color: #333;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
    padding: 20px;
}

.container {
    max-width: 900px;
    margin: 0 auto;
    background: white;
    border-radius: 20px;
    padding: 50px;
    box-shadow: 0 20px 60px rgba(0,0,0,0.3);
    margin-bottom: 40px;
}

.nav {
    margin-bottom: 30px;
    padding-bottom: 20px;
    border-bottom: 2px solid #f0f0f0;
}

.nav a {
    color: #667eea;
    text-decoration: none;
    font-weight: 500;
    font-size: 1.1em;
    transition: color 0.3s ease;
}

.nav a:hover {
    color: #764ba2;
    text-decoration: underline;
}

h1 {
    color: #667eea;
    font-size: 2.5em;
    margin-bottom: 20px;
    margin-top: 10px;
}

h2 {
    color: #667eea;
    font-size: 1.8em;
    margin-top: 40px;
    margin-bottom: 15px;
    padding-bottom: 10px;
    border-bottom: 2px solid #f0f0f0;
}

h3 {
    color: #764ba2;
    font-size: 1.3em;
    margin-top: 25px;
    margin-bottom: 12px;
}

h4 {
    color: #555;
    font-size: 1.1em;
    margin-top: 20px;
    margin-bottom: 10px;
    font-weight: 600;
}

p {
    margin-bottom: 15px;
    line-height: 1.8;
    color: #555;
}

ul {
    margin-left: 25px;
    margin-bottom: 20px;
}

li {
    margin-bottom: 8px;
    line-height: 1.7;
    color: #555;
}

strong {
    color: #333;
    font-weight: 600;
}

a {
    color: #667eea;
    text-decoration: none;
    transition: color 0.3s ease;
}

a:hover {
    color: #764ba2;
    text-decoration: underline;
}

hr {
    border: none;
    border-top: 2px solid #f0f0f0;
    margin: 40px 0;
}

/* Mobile responsiveness */
@media (max-width: 768px) {
    .container {
        padding: 30px 20px;
    }
    
    h1 {
        font-size: 2em;
    }
    
    h2 {
        font-size: 1.5em;
    }
    
    h3 {
        font-size: 1.2em;
    }
}

/* Print styles */
@media print {
    body {
        background: white;
        padding: 0;
    }
    
    .container {
        box-shadow: none;
        border-radius: 0;
        padding: 20px;
    }
    
    .nav {
        display: none;
    }
    
    a {
        color: #000;
        text-decoration: underline;
    }
}