body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background-color: #f8f9fa;
}

.navbar-brand {
    font-weight: bold;
    font-size: 1.5rem;
}

.page-header {
    background: linear-gradient(135deg, #007bff, #0056b3);
    color: white;
    padding: 2rem 0;
    margin-bottom: 2rem;
    border-radius: 0.5rem;
    box-shadow: 0 4px 6px rgba(0,0,0,0.1);
}

.sql-command {
    background-color: #2d3748;
    color: #e2e8f0;
    padding: 1rem;
    border-radius: 0.5rem;
    font-family: 'Courier New', monospace;
    margin: 1rem 0;
    overflow-x: auto;
}

.sql-command code {
    color: #68d391;
}

.tab-content {
    background-color: white;
    padding: 2rem;
    border-radius: 0.5rem;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
    margin-top: 1rem;
}

.card {
    margin-bottom: 1.5rem;
    border: 1px solid #e2e8f0;
    border-radius: 0.5rem;
    transition: transform 0.2s;
}

.card:hover {
    transform: translateY(-5px);
    box-shadow: 0 6px 12px rgba(0,0,0,0.1);
}

.card-title {
    color: #007bff;
    font-weight: 600;
}

.code-block {
    background-color: #f8f9fa;
    border-left: 4px solid #007bff;
    padding: 1rem;
    font-family: 'Courier New', monospace;
    overflow-x: auto;
}

.example {
    background-color: #f0fff4;
    border-left: 4px solid #38a169;
    padding: 1rem;
    margin: 1rem 0;
}

.warning {
    background-color: #fefcbf;
    border-left: 4px solid #ecc94b;
    padding: 1rem;
    margin: 1rem 0;
}

.info {
    background-color: #ebf8ff;
    border-left: 4px solid #4299e1;
    padding: 1rem;
    margin: 1rem 0;
}

.footer {
    background-color: #343a40;
    color: white;
    padding: 2rem 0;
    margin-top: 3rem;
}

.btn-primary {
    background-color: #007bff;
    border-color: #007bff;
}

.btn-primary:hover {
    background-color: #0056b3;
    border-color: #004085;
}

pre {
    background-color: #2d3748;
    color: #e2e8f0;
    padding: 1rem;
    border-radius: 0.5rem;
    overflow-x: auto;
}

.table th {
    background-color: #007bff;
    color: white;
}