:root {
    --primary-color: #3498db;
    --secondary-color: #2980b9;
    --background-color: #f8f9fa;
    --panel-bg: #ffffff;
    --text-color: #333333;
    --border-color: #dddddd;
    --success-color: #2ecc71;
    --error-color: #e74c3c;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}

body {
    background-color: var(--background-color);
    color: var(--text-color);
    line-height: 1.6;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 20px;
}

header {
    text-align: center;
    margin-bottom: 30px;
}

h1 {
    color: var(--primary-color);
    margin-bottom: 10px;
}

.description {
    color: #666;
    max-width: 800px;
    margin: 0 auto 20px;
}

.tool-container {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

@media (min-width: 768px) {
    .tool-container {
        flex-direction: row;
    }
}

.panel {
    flex: 1;
    background-color: var(--panel-bg);
    border-radius: 8px;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    overflow: hidden;
}

.panel-header {
    background-color: var(--primary-color);
    color: white;
    padding: 12px 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.panel-title {
    font-weight: 600;
}

.panel-content {
    padding: 0;
    height: 400px;
    position: relative;
}

textarea, pre {
    width: 100%;
    height: 100%;
    padding: 15px;
    border: none;
    resize: none;
    font-family: 'Consolas', 'Monaco', monospace;
    font-size: 14px;
    line-height: 1.5;
    overflow: auto;
}

textarea:focus {
    outline: none;
}

.controls {
    display: flex;
    flex-wrap: wrap;
    gap: 15px;
    margin: 20px 0;
    padding: 15px;
    background-color: var(--panel-bg);
    border-radius: 8px;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
}

.control-group {
    display: flex;
    flex-direction: column;
    gap: 5px;
    flex: 1;
    min-width: 150px;
}

label {
    font-weight: 600;
    font-size: 14px;
}

select, button {
    padding: 8px 12px;
    border: 1px solid var(--border-color);
    border-radius: 4px;
    background-color: white;
}

button {
    background-color: var(--primary-color);
    color: white;
    border: none;
    cursor: pointer;
    font-weight: 600;
    transition: background-color 0.2s;
}

button:hover {
    background-color: var(--secondary-color);
}

.btn-primary {
    background-color: var(--primary-color);
}

.btn-secondary {
    background-color: #6c757d;
}

.btn-secondary:hover {
    background-color: #5a6268;
}

.status {
    padding: 10px 15px;
    border-radius: 4px;
    margin-top: 15px;
    display: none;
}

.status.success {
    background-color: rgba(46, 204, 113, 0.2);
    border: 1px solid var(--success-color);
    color: var(--success-color);
    display: block;
}

.status.error {
    background-color: rgba(231, 76, 60, 0.2);
    border: 1px solid var(--error-color);
    color: var(--error-color);
    display: block;
}

.syntax-highlight {
    color: #333;
}

.sql-keyword {
    color: #d73a49;
    font-weight: bold;
}

.sql-string {
    color: #032f62;
}

.sql-number {
    color: #005cc5;
}

.sql-function {
    color: #6f42c1;
}

.sql-comment {
    color: #6a737d;
    font-style: italic;
}

footer {
    text-align: center;
    margin-top: 30px;
    color: #666;
    font-size: 14px;
}