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

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
    padding: 20px;
}

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

h1 {
    text-align: center;
    color: white;
    margin-bottom: 30px;
    font-size: 2.5em;
    text-shadow: 2px 2px 4px rgba(0,0,0,0.3);
}

h2 {
    color: #333;
    margin-bottom: 15px;
    font-size: 1.5em;
}

h3 {
    color: #555;
    margin: 15px 0 10px 0;
}

h4 {
    color: #666;
    margin: 10px 0;
}

.section {
    background: white;
    border-radius: 10px;
    padding: 25px;
    margin-bottom: 20px;
    box-shadow: 0 4px 6px rgba(0,0,0,0.1);
}

.form-group {
    margin-bottom: 15px;
}

.form-group label {
    display: block;
    margin-bottom: 5px;
    color: #555;
    font-weight: 500;
}

.form-group input[type="text"],
.form-group textarea {
    width: 100%;
    padding: 10px;
    border: 2px solid #ddd;
    border-radius: 5px;
    font-size: 14px;
    transition: border-color 0.3s;
}

.form-group input[type="text"]:focus,
.form-group textarea:focus {
    outline: none;
    border-color: #667eea;
}

.checkbox-group {
    display: flex;
    gap: 20px;
    flex-wrap: wrap;
}

.checkbox-group label {
    display: flex;
    align-items: center;
    gap: 5px;
    cursor: pointer;
}

.checkbox-group input[type="checkbox"] {
    cursor: pointer;
}

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

.btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 8px rgba(0,0,0,0.2);
}

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

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

.btn-success {
    background: #48bb78;
    color: white;
}

.btn-success:hover {
    background: #38a169;
}

.btn-danger {
    background: #f56565;
    color: white;
}

.btn-danger:hover {
    background: #e53e3e;
}

.btn-secondary {
    background: #718096;
    color: white;
}

.btn-secondary:hover {
    background: #4a5568;
}

.btn:disabled {
    background: #cbd5e0;
    cursor: not-allowed;
    transform: none;
}

.status-indicator {
    display: flex;
    align-items: center;
    gap: 15px;
}

.status {
    padding: 8px 16px;
    border-radius: 20px;
    font-weight: 500;
    font-size: 14px;
}

.status.connected {
    background: #c6f6d5;
    color: #22543d;
}

.status.disconnected {
    background: #fed7d7;
    color: #742a2a;
}

.status.connecting {
    background: #fefcbf;
    color: #744210;
}

.result-box {
    margin-top: 20px;
    padding: 20px;
    background: #f7fafc;
    border-radius: 8px;
    border: 2px solid #e2e8f0;
}

.qr-container {
    display: flex;
    gap: 30px;
    align-items: center;
    margin: 20px 0;
}

#qrImage {
    max-width: 250px;
    border: 3px solid #667eea;
    border-radius: 10px;
    box-shadow: 0 4px 6px rgba(0,0,0,0.1);
}

#qrInfo {
    flex: 1;
}

#qrInfo p {
    margin: 10px 0;
    font-size: 14px;
}

#qrInfo code {
    background: #edf2f7;
    padding: 4px 8px;
    border-radius: 4px;
    font-family: 'Courier New', monospace;
    color: #2d3748;
    font-size: 12px;
    word-break: break-all;
}

.countdown {
    font-size: 24px;
    font-weight: bold;
    color: #667eea;
}

.countdown.warning {
    color: #ed8936;
}

.countdown.danger {
    color: #f56565;
}

.waiting {
    text-align: center;
    padding: 20px;
    background: #fefcbf;
    border-radius: 8px;
    margin: 15px 0;
}

.waiting p {
    font-size: 16px;
    color: #744210;
}

.success-box {
    background: #c6f6d5;
    padding: 20px;
    border-radius: 8px;
    margin-top: 15px;
}

.success-box h4 {
    color: #22543d;
    margin-bottom: 15px;
}

.card-display {
    background: white;
    padding: 20px;
    border-radius: 8px;
    border: 2px solid #e2e8f0;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

.card-display img {
    width: 80px;
    height: 80px;
    border-radius: 50%;
    object-fit: cover;
    margin-bottom: 10px;
}

.card-display h3 {
    color: #2d3748;
    margin: 10px 0 5px 0;
}

.card-display p {
    margin: 5px 0;
    color: #4a5568;
    font-size: 14px;
}

.card-display .company {
    color: #718096;
    font-size: 13px;
}

.card-display .contact-info {
    margin-top: 15px;
    padding-top: 15px;
    border-top: 1px solid #e2e8f0;
}

.card-display .contact-info p {
    display: flex;
    align-items: center;
    gap: 8px;
}

.log-container {
    background: #1a202c;
    color: #e2e8f0;
    padding: 15px;
    border-radius: 8px;
    max-height: 400px;
    overflow-y: auto;
    font-family: 'Courier New', monospace;
    font-size: 13px;
    margin-top: 10px;
}

.log-entry {
    padding: 8px;
    margin: 5px 0;
    border-radius: 4px;
    border-left: 3px solid #4a5568;
}

.log-entry.info {
    background: #2d3748;
    border-left-color: #4299e1;
}

.log-entry.success {
    background: #22543d;
    border-left-color: #48bb78;
}

.log-entry.error {
    background: #742a2a;
    border-left-color: #f56565;
}

.log-entry.warning {
    background: #744210;
    border-left-color: #ed8936;
}

.log-entry .timestamp {
    color: #a0aec0;
    font-size: 11px;
    margin-right: 10px;
}

.test-buttons {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
}

@media (max-width: 768px) {
    .qr-container {
        flex-direction: column;
    }
    
    #qrImage {
        max-width: 200px;
    }
    
    .status-indicator {
        flex-direction: column;
        align-items: stretch;
    }
    
    .test-buttons {
        flex-direction: column;
    }
}