* {
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: 20px;
}

.container {
background: white;
border-radius: 20px;
box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
max-width: 1000px;
margin: 0 auto;
padding: 40px;
}

.header {
text-align: center;
margin-bottom: 40px;
padding-bottom: 20px;
border-bottom: 3px solid #667eea;
}

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

.header .subtitle {
color: #666;
font-size: 1.2em;
}

.nav-tabs {
display: flex;
gap: 10px;
margin-bottom: 30px;
flex-wrap: wrap;
justify-content: center;
}

.tab-btn {
background: #f5f5f5;
border: 2px solid #e0e0e0;
padding: 12px 24px;
border-radius: 8px;
font-size: 16px;
font-weight: 600;
cursor: pointer;
transition: all 0.3s;
}

.tab-btn:hover {
background: #e8ebff;
border-color: #667eea;
}

.tab-btn.active {
background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
color: white;
border-color: #667eea;
}

.tab-content {
display: none;
}

.tab-content.active {
display: block;
animation: fadeIn 0.5s;
}

@keyframes fadeIn {
from { opacity: 0; transform: translateY(10px); }
to { opacity: 1; transform: translateY(0); }
}

.section {
margin-bottom: 40px;
}

.section h2 {
color: #667eea;
font-size: 1.8em;
margin-bottom: 15px;
padding-left: 15px;
border-left: 4px solid #667eea;
}

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

.section p {
color: #333;
line-height: 1.8;
margin-bottom: 15px;
font-size: 16px;
}

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

.section li {
color: #333;
line-height: 1.8;
margin-bottom: 10px;
font-size: 16px;
}

.feature-grid {
display: grid;
grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
gap: 20px;
margin: 20px 0;
}

.feature-card {
background: #f9f9f9;
padding: 20px;
border-radius: 12px;
border: 2px solid #e0e0e0;
transition: all 0.3s;
}

.feature-card:hover {
border-color: #667eea;
transform: translateY(-5px);
box-shadow: 0 10px 30px rgba(102, 126, 234, 0.2);
}

.feature-card h4 {
color: #667eea;
font-size: 1.2em;
margin-bottom: 10px;
display: flex;
align-items: center;
gap: 10px;
}

.feature-card p {
color: #666;
font-size: 14px;
line-height: 1.6;
}

.icon {
font-size: 1.5em;
}

.callout {
background: #e8ebff;
border-left: 4px solid #667eea;
padding: 20px;
border-radius: 8px;
margin: 20px 0;
}

.callout.warning {
background: #fff3cd;
border-left-color: #ffc107;
}

.callout.success {
background: #d4edda;
border-left-color: #28a745;
}

.callout h4 {
color: #667eea;
margin-bottom: 10px;
font-size: 1.1em;
}

.callout.warning h4 {
color: #856404;
}

.callout.success h4 {
color: #155724;
}

.button-example {
display: inline-flex;
align-items: center;
gap: 8px;
background: #f5f5f5;
padding: 8px 16px;
border-radius: 6px;
border: 1px solid #ddd;
margin: 5px;
font-family: monospace;
font-size: 14px;
}

.kbd {
background: #667eea;
color: white;
padding: 4px 10px;
border-radius: 4px;
font-family: monospace;
font-size: 14px;
font-weight: 600;
}

.footer {
margin-top: 50px;
padding-top: 30px;
border-top: 2px solid #e0e0e0;
text-align: center;
color: #666;
}

.footer p {
margin-bottom: 10px;
}

.version {
display: inline-block;
background: #667eea;
color: white;
padding: 5px 15px;
border-radius: 20px;
font-size: 14px;
font-weight: 600;
margin-top: 10px;
}

table {
width: 100%;
border-collapse: collapse;
margin: 20px 0;
}

th, td {
padding: 12px;
text-align: left;
border-bottom: 1px solid #e0e0e0;
}

th {
background: #f5f5f5;
color: #667eea;
font-weight: 600;
}

tr:hover {
background: #f9f9f9;
}

code {
background: #f5f5f5;
padding: 2px 6px;
border-radius: 4px;
font-family: monospace;
color: #667eea;
}