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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
    padding: 20px;
    color: #333;
}

.container {
    max-width: 600px;
    margin: 0 auto;
    background: white;
    border-radius: 20px;
    padding: 30px;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
}

h1 {
    text-align: center;
    color: #667eea;
    margin-bottom: 30px;
    font-size: 28px;
}

h2 {
    color: #555;
    margin-bottom: 15px;
    font-size: 20px;
}

h3 {
    color: #666;
    margin-bottom: 10px;
    font-size: 16px;
}

.status {
    text-align: center;
    padding: 15px;
    background: #f0f0f0;
    border-radius: 10px;
    margin-bottom: 20px;
    font-weight: bold;
    color: #666;
}

.status.connected {
    background: #d4edda;
    color: #155724;
}

.btn {
    width: 100%;
    padding: 15px;
    margin: 10px 0;
    border: none;
    border-radius: 10px;
    font-size: 16px;
    font-weight: bold;
    cursor: pointer;
    transition: all 0.3s;
}

.btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.2);
}

.btn-primary {
    background: #667eea;
    color: white;
}

.btn-primary:hover {
    background: #5568d3;
}

.btn-success {
    background: #28a745;
    color: white;
}

.btn-success:hover {
    background: #218838;
}

.btn-danger {
    background: #dc3545;
    color: white;
}

.btn-danger:hover {
    background: #c82333;
}

.controls {
    margin-top: 30px;
    padding-top: 20px;
    border-top: 2px solid #f0f0f0;
}

.log {
    margin-top: 30px;
    padding-top: 20px;
    border-top: 2px solid #f0f0f0;
}

#log {
    background: #f8f9fa;
    padding: 15px;
    border-radius: 10px;
    max-height: 200px;
    overflow-y: auto;
    font-size: 14px;
    font-family: 'Courier New', monospace;
}

.log-entry {
    padding: 5px 0;
    border-bottom: 1px solid #e0e0e0;
}

.log-entry:last-child {
    border-bottom: none;
}

.log-time {
    color: #999;
    font-size: 12px;
}