:root {
    --primary-color: #667eea;
    --secondary-color: #764ba2;
    --text-color: #333;
    --bg-light: #f8f9fa;
    --border-color: #dee2e6;
}

body {
    font-family: 'Inter', sans-serif;
    color: var(--text-color);
    background: var(--bg-light);
}

.navbar {
    background: white;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
}

.navbar-brand {
    font-weight: 700;
    font-size: 1.5rem;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

/* Language Switcher */
.language-switcher-btn {
    background: none;
    border: 1px solid rgba(0,0,0,0.1);
    border-radius: 4px;
    padding: 0.5rem 0.75rem;
    cursor: pointer;
    transition: all 0.2s;
    color: var(--text-color);
}

.language-switcher-btn:hover {
    background: var(--bg-light);
    border-color: var(--primary-color);
    color: var(--primary-color);
}

.language-switcher-btn i {
    font-size: 1rem;
}

.dropdown-menu {
    min-width: 150px;
    box-shadow: 0 4px 12px rgba(0,0,0,0.15);
    border: none;
    border-radius: 8px;
    padding: 0.5rem 0;
}

.dropdown-item {
    padding: 0.5rem 1rem;
    transition: all 0.2s;
}

.dropdown-item:hover {
    background: var(--bg-light);
    color: var(--primary-color);
}

.sidebar {
    position: sticky;
    top: 80px;
    height: calc(100vh - 80px);
    overflow-y: auto;
    background: white;
    border-right: 1px solid var(--border-color);
    padding: 2rem 0;
}

.sidebar ul {
    list-style: none;
    padding: 0;
}

.sidebar li {
    margin-bottom: 0.5rem;
}

.sidebar a {
    color: var(--text-color);
    text-decoration: none;
    padding: 0.5rem 1.5rem;
    display: block;
    transition: all 0.2s;
    border-left: 3px solid transparent;
}

.sidebar a:hover {
    background: var(--bg-light);
    border-left-color: var(--primary-color);
    color: var(--primary-color);
}

.sidebar a.active {
    background: var(--bg-light);
    border-left-color: var(--primary-color);
    color: var(--primary-color);
    font-weight: 600;
}

.content {
    padding: 2rem;
    background: white;
    border-radius: 8px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.05);
    margin-bottom: 2rem;
}

.content h1 {
    color: var(--primary-color);
    margin-bottom: 1.5rem;
    padding-bottom: 0.5rem;
    border-bottom: 2px solid var(--border-color);
}

.content h2 {
    color: var(--text-color);
    margin-top: 2rem;
    margin-bottom: 1rem;
}

.content h3 {
    color: var(--text-color);
    margin-top: 1.5rem;
    margin-bottom: 0.75rem;
}

.content p {
    line-height: 1.6;
    margin-bottom: 1rem;
}

.content ul, .content ol {
    margin-bottom: 1.5rem;
    padding-left: 2rem;
}

.content li {
    margin-bottom: 0.5rem;
}

.code-block {
    background: #f4f4f4;
    border: 1px solid var(--border-color);
    border-radius: 4px;
    padding: 1rem;
    margin: 1rem 0;
    overflow-x: auto;
}

.code-block pre {
    margin: 0;
    font-family: 'Monaco', 'Courier New', monospace;
    font-size: 0.9rem;
    line-height: 1.5;
    color: #333;
}

.code-block code {
    font-family: 'Monaco', 'Courier New', monospace;
    font-size: 0.9rem;
}

.content code {
    background: #f4f4f4;
    padding: 0.2rem 0.4rem;
    border-radius: 3px;
    font-family: 'Monaco', 'Courier New', monospace;
    font-size: 0.9em;
    color: var(--primary-color);
}

.alert {
    padding: 1rem;
    border-radius: 4px;
    margin: 1rem 0;
}

.alert-info {
    background: #e7f3ff;
    border-left: 4px solid #2196F3;
    color: #0d47a1;
}

.alert-warning {
    background: #fff3cd;
    border-left: 4px solid #ffc107;
    color: #856404;
}

.alert-success {
    background: #d4edda;
    border-left: 4px solid #28a745;
    color: #155724;
}

@media (max-width: 768px) {
    .sidebar {
        position: relative;
        height: auto;
        border-right: none;
        border-bottom: 1px solid var(--border-color);
        margin-bottom: 1rem;
    }
    
    .content {
        padding: 1rem;
    }
}