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

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
    padding: 40px 20px;
}

.container {
    max-width: 900px;
    margin: 0 auto;
    background: white;
    border-radius: 15px;
    padding: 40px;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
}

h1 {
    color: #333;
    margin-bottom: 10px;
    text-align: center;
    font-size: 2.5rem;
}

.subtitle {
    text-align: center;
    color: #666;
    margin-bottom: 40px;
    font-size: 1.1rem;
}

h2 {
    color: #667eea;
    margin-top: 40px;
    margin-bottom: 20px;
    border-bottom: 3px solid #667eea;
    padding-bottom: 10px;
    font-size: 1.8rem;
}

h3 {
    color: #555;
    margin-top: 25px;
    margin-bottom: 15px;
    font-size: 1.3rem;
}

p {
    color: #666;
    line-height: 1.8;
    margin-bottom: 15px;
    font-size: 1rem;
}

code {
    background: #f5f5f5;
    padding: 2px 6px;
    border-radius: 4px;
    font-family: 'Courier New', monospace;
    color: #d63384;
}

.code-block {
    background: #f5f5f5;
    border-left: 4px solid #667eea;
    padding: 15px;
    margin: 20px 0;
    border-radius: 5px;
    overflow-x: auto;
}

.code-block code {
    background: none;
    padding: 0;
    color: #333;
    display: block;
    font-size: 0.9rem;
}

.example-section {
    background: #e3f2fd;
    border-radius: 8px;
    padding: 20px;
    margin: 20px 0;
    border-left: 5px solid #2196F3;
}

.example-section h4 {
    color: #1565c0;
    margin-bottom: 10px;
}

.endpoint-list {
    background: #f9f9f9;
    padding: 20px;
    border-radius: 8px;
    margin: 15px 0;
}

.endpoint-item {
    margin: 15px 0;
    padding: 15px;
    background: white;
    border-left: 4px solid #667eea;
    border-radius: 4px;
}

.endpoint-item strong {
    color: #667eea;
    font-family: monospace;
}

ul, ol {
    margin-left: 20px;
    color: #666;
    line-height: 1.8;
}

li {
    margin: 10px 0;
}

.back-button {
    display: inline-block;
    margin-top: 30px;
    padding: 12px 30px;
    background: #667eea;
    color: white;
    text-decoration: none;
    border-radius: 8px;
    transition: all 0.3s;
    font-weight: 600;
}

.back-button:hover {
    background: #764ba2;
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(102, 126, 234, 0.4);
}

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

.note strong {
    color: #856404;
}

.success {
    background: #d4edda;
    border-left: 4px solid #28a745;
    padding: 15px;
    border-radius: 4px;
    margin: 15px 0;
}

.success strong {
    color: #155724;
}

.interactive-demo {
    background: #f5f5f5;
    padding: 20px;
    border-radius: 8px;
    margin: 20px 0;
}

.interactive-demo input,
.interactive-demo button {
    padding: 10px;
    margin: 5px;
    border: 1px solid #ddd;
    border-radius: 4px;
    font-size: 0.9rem;
}

.interactive-demo button {
    background: #667eea;
    color: white;
    cursor: pointer;
    border: none;
    font-weight: 600;
}

.interactive-demo button:hover {
    background: #764ba2;
}

.result {
    background: white;
    padding: 15px;
    margin-top: 10px;
    border-radius: 4px;
    border: 1px solid #ddd;
    max-height: 200px;
    overflow-y: auto;
    font-size: 0.85rem;
    font-family: monospace;
}