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

body {
    font-family: 'Arial', sans-serif;
    line-height: 1.6;
    color: #333;
    background-color: #f4f4f4;
}

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

/* Header Styles */
header {
    background-color: #2c3e50;
    padding: 1rem 0;
    position: sticky;
    top: 0;
    z-index: 100;
    box-shadow: 0 2px 5px rgba(0,0,0,0.1);
}

nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

.logo {
    color: white;
    font-size: 1.5rem;
    font-weight: bold;
}

.nav-links {
    display: flex;
    list-style: none;
}

.nav-links li {
    margin-left: 2rem;
}

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

.nav-links a:hover {
    color: #3498db;
}

/* Hero Section */
.hero {
    background: linear-gradient(135deg, #2c3e50, #1a2530);
    color: white;
    text-align: center;
    padding: 5rem 1rem;
    margin-bottom: 2rem;
}

.hero h1 {
    font-size: 3rem;
    margin-bottom: 1rem;
}

.hero p {
    font-size: 1.2rem;
    max-width: 700px;
    margin: 0 auto;
}

/* Tutorial Overview */
.tutorial-overview {
    padding: 2rem 0;
    background-color: white;
}

.tutorial-overview h2 {
    text-align: center;
    margin-bottom: 2rem;
    font-size: 2.5rem;
    color: #2c3e50;
}

.card-container {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin-top: 2rem;
}

.card {
    background: white;
    border-radius: 8px;
    box-shadow: 0 4px 8px rgba(0,0,0,0.1);
    padding: 1.5rem;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    border: 1px solid #eee;
}

.card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 16px rgba(0,0,0,0.15);
}

.card h3 {
    color: #2c3e50;
    margin-bottom: 1rem;
    font-size: 1.5rem;
}

.card p {
    margin-bottom: 1.5rem;
    color: #666;
}

.btn {
    display: inline-block;
    background: #3498db;
    color: white;
    padding: 0.8rem 1.5rem;
    border-radius: 4px;
    text-decoration: none;
    font-weight: bold;
    transition: background 0.3s ease;
}

.btn:hover {
    background: #2980b9;
}

/* Content Sections for Tutorial Pages */
.content-section {
    background: white;
    margin: 2rem 0;
    padding: 2rem 0;
}

.topic-card {
    background: #f9f9f9;
    border-left: 4px solid #3498db;
    padding: 1.5rem;
    margin: 1.5rem 0;
    border-radius: 0 8px 8px 0;
}

.topic-card h4 {
    color: #2c3e50;
    margin-bottom: 1rem;
    font-size: 1.3rem;
}

.topic-card ul {
    margin: 1rem 0;
    padding-left: 1.5rem;
}

.topic-card li {
    margin-bottom: 0.5rem;
}

.topic-card pre {
    background: #2c3e50;
    color: white;
    padding: 1rem;
    border-radius: 4px;
    overflow-x: auto;
    margin-top: 1rem;
}

.topic-card code {
    font-family: 'Courier New', monospace;
}

/* Footer */
footer {
    background: #2c3e50;
    color: white;
    text-align: center;
    padding: 2rem 0;
    margin-top: 3rem;
}

/* Responsive Design */
@media (max-width: 768px) {
    .nav-links {
        flex-direction: column;
    }
    
    .nav-links li {
        margin: 0.5rem 0;
    }
    
    .hero h1 {
        font-size: 2rem;
    }
    
    .hero p {
        font-size: 1rem;
    }
    
    .card-container {
        grid-template-columns: 1fr;
    }
    
    .content-section {
        padding: 1rem;
    }
}