* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Microsoft YaHei', Arial, sans-serif;
    background-color: #f5f5f5;
    color: #333;
}

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

h1 {
    text-align: center;
    margin-bottom: 20px;
    color: #2c3e50;
}

.toolbar {
    background-color: #fff;
    border-radius: 8px;
    padding: 20px;
    margin-bottom: 20px;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

.toolbar h2 {
    margin-bottom: 15px;
    color: #34495e;
}

.components {
    display: flex;
    gap: 10px;
    margin-bottom: 15px;
    flex-wrap: wrap;
}

.examples {
    display: flex;
    gap: 10px;
    margin-bottom: 15px;
    flex-wrap: wrap;
}

.examples button {
    padding: 10px 20px;
    background-color: #9b59b6;
    color: white;
    border: none;
    border-radius: 5px;
    cursor: pointer;
    font-size: 14px;
    transition: background-color 0.3s;
}

.examples button:hover {
    background-color: #8e44ad;
}

.component-btn {
    padding: 10px 20px;
    background-color: #3498db;
    color: white;
    border: none;
    border-radius: 5px;
    cursor: pointer;
    font-size: 14px;
    transition: background-color 0.3s;
}

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

.actions {
    display: flex;
    gap: 10px;
}

#clear-btn {
    padding: 10px 20px;
    background-color: #e74c3c;
    color: white;
    border: none;
    border-radius: 5px;
    cursor: pointer;
    font-size: 14px;
    transition: background-color 0.3s;
}

#clear-btn:hover {
    background-color: #c0392b;
}

#save-btn, #load-btn {
    padding: 10px 20px;
    background-color: #2ecc71;
    color: white;
    border: none;
    border-radius: 5px;
    cursor: pointer;
    font-size: 14px;
    transition: background-color 0.3s;
}

#save-btn:hover, #load-btn:hover {
    background-color: #27ae60;
}

.simulation-area {
    background-color: #fff;
    border-radius: 8px;
    padding: 20px;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 600px;
}

#simulation-canvas {
    border: 2px solid #ddd;
    background-color: #fafafa;
    cursor: crosshair;
}

.status-bar {
    margin-top: 20px;
    padding: 10px 20px;
    background-color: #fff;
    border-radius: 8px;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

#status-text {
    font-size: 14px;
    color: #7f8c8d;
}