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

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    line-height: 1.6;
    color: #333;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    padding: 20px;
}

@media (max-width: 768px) {
    body {
        padding: 10px;
    }
}

@media (max-width: 480px) {
    body {
        padding: 5px;
    }
}

.container {
    margin: 0 auto;
    background: white;
    border-radius: 15px;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
    overflow: hidden;
}

header {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 10px 30px;
    text-align: center;
}

header h1 {
    font-size: 2.5em;
    margin-bottom: 10px;
}

header p {
    font-size: 1.2em;
    opacity: 0.9;
}

.content {
    padding: 40px;
}

h2 {
    color: #667eea;
    margin-top: 30px;
    margin-bottom: 15px;
    font-size: 1.8em;
    border-bottom: 3px solid #667eea;
    padding-bottom: 10px;
}

h3 {
    color: #764ba2;
    margin-top: 25px;
    margin-bottom: 15px;
    font-size: 1.4em;
}

h4 {
    color: #555;
    margin-top: 20px;
    margin-bottom: 10px;
    font-size: 1.2em;
}

p {
    margin-bottom: 15px;
}

ul, ol {
    margin-left: 30px;
    margin-bottom: 20px;
}

li {
    margin-bottom: 10px;
}

code {
    background: #f4f4f4;
    padding: 2px 6px;
    border-radius: 3px;
    font-family: 'Courier New', monospace;
    color: #e83e8c;
}

pre {
    background: #1e1e1e;
    color: #d4d4d4;
    padding: 20px;
    border-radius: 8px;
    overflow-x: auto;
    margin: 15px 0;
    border-left: 4px solid #667eea;
}

pre code {
    background: none;
    color: #d4d4d4;
    padding: 0;
}

.output {
    background: #f8f9fa;
    border-left: 4px solid #28a745;
    padding: 15px;
    margin: 15px 0;
    border-radius: 5px;
}

.output-title {
    font-weight: bold;
    color: #28a745;
    margin-bottom: 10px;
}

.note {
    background: #fff3cd;
    border-left: 4px solid #ffc107;
    padding: 15px;
    margin: 15px 0;
    border-radius: 5px;
}

.warning {
    background: #f8d7da;
    border-left: 4px solid #dc3545;
    padding: 15px;
    margin: 15px 0;
    border-radius: 5px;
}

.info-box {
    background: #d1ecf1;
    border-left: 4px solid #17a2b8;
    padding: 20px;
    margin: 20px 0;
    border-radius: 5px;
}

.step {
    background: #e7f3ff;
    padding: 20px;
    margin: 20px 0;
    border-radius: 8px;
    border-left: 5px solid #667eea;
}

.step-number {
    display: inline-block;
    background: #667eea;
    color: white;
    width: 30px;
    height: 30px;
    border-radius: 50%;
    text-align: center;
    line-height: 30px;
    font-weight: bold;
    margin-right: 10px;
}

strong {
    color: #667eea;
}

.file-structure {
    background: #f8f9fa;
    padding: 20px;
    border-radius: 8px;
    font-family: 'Courier New', monospace;
    margin: 15px 0;
}

footer {
    background: #333;
    color: white;
    text-align: center;
    padding: 20px;
}

@media (max-width: 1024px) {
    .content {
        padding: 30px;
    }

    pre {
        padding: 15px;
        font-size: 0.9em;
    }
}

@media (max-width: 768px) {
    .container {
        margin: 0;
        border-radius: 10px;
    }

    header {
        padding: 30px 20px;
    }

    header h1 {
        font-size: 2em;
    }

    header p {
        font-size: 1.05em;
    }

    .content {
        padding: 25px 20px;
    }

    h2 {
        font-size: 1.6em;
        margin-top: 25px;
    }

    h3 {
        font-size: 1.3em;
        margin-top: 20px;
    }

    h4 {
        font-size: 1.15em;
    }

    ul, ol {
        margin-left: 25px;
    }

    pre {
        padding: 15px;
        font-size: 0.85em;
        overflow-x: scroll;
    }

    .step {
        padding: 15px;
    }

    .output, .note, .warning, .info-box {
        padding: 12px;
        margin: 12px 0;
    }

    .file-structure {
        padding: 15px;
        font-size: 0.9em;
        overflow-x: auto;
    }
}

@media (max-width: 480px) {
    .container {
        border-radius: 8px;
    }

    header {
        padding: 25px 15px;
    }

    header h1 {
        font-size: 1.6em;
        margin-bottom: 5px;
    }

    header p {
        font-size: 0.95em;
    }

    .content {
        padding: 20px 12px;
    }

    h2 {
        font-size: 1.4em;
        margin-top: 20px;
        margin-bottom: 12px;
    }

    h3 {
        font-size: 1.2em;
        margin-top: 15px;
        margin-bottom: 12px;
    }

    h4 {
        font-size: 1.1em;
        margin-top: 12px;
    }

    p {
        margin-bottom: 12px;
        font-size: 0.95em;
    }

    ul, ol {
        margin-left: 20px;
        margin-bottom: 15px;
    }

    li {
        margin-bottom: 8px;
        font-size: 0.95em;
    }

    pre {
        padding: 12px;
        font-size: 0.75em;
        margin: 12px 0;
    }

    code {
        font-size: 0.85em;
        padding: 2px 4px;
    }

    .step {
        padding: 12px;
        margin: 15px 0;
    }

    .step-number {
        width: 28px;
        height: 28px;
        line-height: 28px;
        font-size: 0.9em;
        margin-right: 8px;
    }

    .output, .note, .warning, .info-box {
        padding: 10px;
        margin: 10px 0;
        font-size: 0.95em;
    }

    .output-title {
        font-size: 0.95em;
    }

    .file-structure {
        padding: 12px;
        font-size: 0.8em;
    }

    footer {
        padding: 15px 10px;
        font-size: 0.9em;
    }
}

@media (max-width: 360px) {
    header h1 {
        font-size: 1.4em;
    }

    header p {
        font-size: 0.85em;
    }

    h2 {
        font-size: 1.3em;
    }

    h3 {
        font-size: 1.1em;
    }

    pre {
        font-size: 0.7em;
        padding: 10px;
    }
}