header {
    background: linear-gradient(to right, #2c3e50, #4a6491);
    color: white;
    padding: 60px 20px;
    text-align: center;
    border-radius: 10px;
    margin-bottom: 40px;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
    position: relative;
    overflow: hidden;
}

header::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100" preserveAspectRatio="none"><path d="M0,0 L100,0 L100,100 Z" fill="rgba(255,255,255,0.1)"/></svg>');
    background-size: cover;
}

.subtitle {
    font-size: 1.2rem;
    opacity: 0.9;
    max-width: 800px;
    margin: 0 auto;
    position: relative;
}

.content-section {
    background: white;
    padding: 30px;
    border-radius: 10px;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
    margin-bottom: 30px;
}

.code-block {
    background: #2c3e50;
    color: #ecf0f1;
    padding: 18px;
    border-radius: 5px;
    margin: 20px 0;
    font-family: 'Courier New', monospace;
    overflow-x: auto;
    line-height: 1.5;
    position: relative;
}

.code-block::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 30px;
    background: rgba(0, 0, 0, 0.2);
    border-radius: 5px 5px 0 0;
}

.command {
    background: #34495e;
    color: #f39c12;
    padding: 8px 12px;
    border-radius: 4px;
    font-family: 'Courier New', monospace;
    display: inline-block;
    margin: 5px 0;
}

.note {
    background: #e8f4fd;
    border-left: 4px solid #3498db;
    padding: 15px;
    margin: 15px 0;
    border-radius: 0 5px 5px 0;
}

.warning {
    background: #fdf2e8;
    border-left: 4px solid #e67e22;
    padding: 15px;
    margin: 15px 0;
    border-radius: 0 5px 5px 0;
}

.tabs {
    display: flex;
    margin-bottom: 20px;
    border-bottom: 1px solid #ddd;
}

.tab {
    padding: 12px 25px;
    background: #f8f9fa;
    border: 1px solid #ddd;
    border-bottom: none;
    cursor: pointer;
    border-radius: 5px 5px 0 0;
    margin-right: 5px;
    transition: all 0.3s;
}

.tab.active {
    background: white;
    border-bottom: 1px solid white;
    margin-bottom: -1px;
    color: #f39c12;
    font-weight: bold;
}

.tab-content {
    display: none;
    padding: 20px;
    background: white;
    border-radius: 0 5px 5px 5px;
}

.tab-content.active {
    display: block;
}

.step {
    display: flex;
    margin-bottom: 25px;
    align-items: flex-start;
}

.step-number {
    background: #3498db;
    color: white;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-right: 15px;
    font-weight: bold;
    flex-shrink: 0;
    box-shadow: 0 3px 6px rgba(0, 0, 0, 0.16);
}

.step-content {
    flex: 1;
}

.config-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 20px;
    margin: 20px 0;
}

.config-card {
    background: #f8f9fa;
    padding: 20px;
    border-radius: 8px;
    box-shadow: 0 3px 10px rgba(0, 0, 0, 0.08);
    border-left: 4px solid #3498db;
}

.config-card h4 {
    color: #2c3e50;
    margin-bottom: 10px;
}

.checklist {
    list-style: none;
    padding-left: 0;
}

.checklist li {
    margin-bottom: 10px;
    padding-left: 30px;
    position: relative;
}

.checklist li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: #27ae60;
    font-weight: bold;
}

.download-links {
    display: flex;
    flex-wrap: wrap;
    gap: 15px;
    margin: 20px 0;
}

.download-btn {
    display: inline-block;
    padding: 12px 25px;
    background: #3498db;
    color: white;
    text-decoration: none;
    border-radius: 5px;
    font-weight: bold;
    transition: background 0.3s;
}

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

.download-btn i {
    margin-right: 8px;
}

@media (max-width: 768px) {
    .tabs {
        flex-direction: column;
    }

    .tab {
        border-radius: 0;
        margin-right: 0;
        border-bottom: 1px solid #ddd;
    }

    .tab.active {
        border-radius: 5px 5px 0 0;
    }
    .config-grid {
        grid-template-columns: 1fr;
    }
}