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

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: linear-gradient(135deg, #1a1a1a 0%, #0d1b2a 100%);
    min-height: 100vh;
    padding: 20px;
}

.container {
    max-width: 1000px;
    margin: 0 auto;
    background: #f5f5f5;
    border-radius: 10px;
    box-shadow: 0 10px 40px rgba(0,0,0,0.5);
    padding: 30px;
}

h1 {
    color: #0d1b2a;
    margin-bottom: 10px;
    text-align: center;
    font-size: 32px;
}

.subtitle {
    text-align: center;
    color: #444;
    margin-bottom: 30px;
    font-size: 16px;
}

.section {
    margin-bottom: 40px;
}

h2 {
    color: #0d1b2a;
    font-size: 24px;
    margin-bottom: 15px;
    padding-bottom: 10px;
    border-bottom: 3px solid #0d1b2a;
}

h3 {
    color: #1a3a52;
    font-size: 18px;
    margin-top: 20px;
    margin-bottom: 10px;
}

p {
    color: #333;
    line-height: 1.6;
    margin-bottom: 12px;
}

ul {
    color: #333;
    line-height: 1.8;
    margin-left: 30px;
    margin-bottom: 15px;
}

li {
    margin-bottom: 8px;
}

.code-block {
    background: #2a2a2a;
    color: #f5f5f5;
    padding: 15px;
    border-radius: 5px;
    overflow-x: auto;
    margin: 15px 0;
    font-family: 'Courier New', monospace;
    font-size: 12px;
    border-left: 4px solid #0d1b2a;
}

.highlight {
    background: #e8f4f8;
    padding: 20px;
    border-radius: 5px;
    border-left: 4px solid #0d1b2a;
    margin: 15px 0;
}

.highlight strong {
    color: #0d1b2a;
}

.step {
    background: #fff;
    border: 1px solid #ddd;
    padding: 20px;
    margin: 15px 0;
    border-radius: 5px;
    border-left: 4px solid #0d1b2a;
}

.step-number {
    display: inline-block;
    background: #0d1b2a;
    color: white;
    width: 30px;
    height: 30px;
    border-radius: 50%;
    text-align: center;
    line-height: 30px;
    font-weight: bold;
    margin-right: 10px;
}

.step-title {
    color: #0d1b2a;
    font-weight: bold;
    font-size: 16px;
    margin-bottom: 10px;
}

a {
    color: #1f5aa5;
    text-decoration: underline;
}

a:hover {
    text-decoration: underline;
    color: #2a6fbf;
}

.back-link {
    display: inline-block;
    margin-top: 30px;
    padding: 10px 20px;
    background: #0d1b2a;
    color: white;
    border-radius: 5px;
    text-decoration: none;
    transition: background 0.3s;
}

.back-link:hover {
    background: #1a3a52;
    text-decoration: none;
}

.folder-structure {
    background: #2a2a2a;
    color: #f5f5f5;
    padding: 15px;
    border-radius: 5px;
    font-family: 'Courier New', monospace;
    font-size: 12px;
    margin: 15px 0;
    border-left: 4px solid #0d1b2a;
    overflow-x: auto;
}

@media (max-width: 768px) {
    .container {
        padding: 20px;
    }
    
    h1 {
        font-size: 24px;
    }
    
    h2 {
        font-size: 20px;
    }
    
    h3 {
        font-size: 16px;
    }
    
    .code-block,
    .folder-structure {
        font-size: 11px;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 15px;
    }
    
    h1 {
        font-size: 20px;
    }
    
    h2 {
        font-size: 18px;
    }
    
    p, li {
        font-size: 14px;
    }
}