* {
    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;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    background: white;
    border-radius: 10px;
    padding: 30px;
    box-shadow: 0 10px 40px rgba(0,0,0,0.2);
}

h1 {
    color: #333;
    margin-bottom: 30px;
    text-align: center;
}

h2 {
    color: #555;
    margin-bottom: 15px;
    font-size: 1.2em;
}

.config-panel, .control-panel, .status-panel, .log-panel {
    margin-bottom: 30px;
    padding: 20px;
    background: #f8f9fa;
    border-radius: 8px;
}

.form-group {
    display: flex;
    align-items: center;
    margin-bottom: 15px;
    gap: 10px;
}

.form-group label {
    min-width: 120px;
    font-weight: 500;
    color: #555;
}

.form-group input,
.form-group select {
    flex: 1;
    padding: 8px 12px;
    border: 1px solid #ddd;
    border-radius: 4px;
    font-size: 14px;
}

.control-panel {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
}

.btn {
    padding: 10px 20px;
    border: none;
    border-radius: 5px;
    cursor: pointer;
    font-size: 14px;
    font-weight: 500;
    transition: all 0.3s;
}

.btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

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

.btn-primary:hover:not(:disabled) {
    background: #5568d3;
}

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

.btn-secondary:hover:not(:disabled) {
    background: #5a6268;
}

.status-panel {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.status {
    font-weight: 600;
    padding: 8px 16px;
    border-radius: 5px;
    background: #dc3545;
    color: white;
}

.status.connected {
    background: #28a745;
}

.port-info {
    color: #666;
    font-size: 14px;
}

.log {
    max-height: 400px;
    overflow-y: auto;
    background: #1e1e1e;
    color: #d4d4d4;
    padding: 15px;
    border-radius: 5px;
    font-family: 'Courier New', monospace;
    font-size: 12px;
}

.log-entry {
    margin-bottom: 5px;
    padding: 3px 0;
}

.log-info {
    color: #d4d4d4;
}

.log-success {
    color: #4ec9b0;
}

.log-warning {
    color: #dcdcaa;
}

.log-error {
    color: #f48771;
}