* {
    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;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
}

.container {
    background: white;
    border-radius: 20px;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
    max-width: 800px;
    width: 100%;
    padding: 40px;
}

header {
    text-align: center;
    margin-bottom: 40px;
}

h1 {
    font-size: 3rem;
    color: #667eea;
    margin-bottom: 10px;
}

.subtitle {
    font-size: 1.2rem;
    color: #666;
}

h2 {
    color: #333;
    margin-bottom: 20px;
    font-size: 1.5rem;
}

h3 {
    color: #555;
    margin-bottom: 15px;
    font-size: 1.2rem;
}

.test-section {
    margin-bottom: 40px;
}

.test-box {
    background: #f8f9fa;
    padding: 20px;
    border-radius: 10px;
    margin-bottom: 20px;
    border-left: 4px solid #667eea;
}

.btn {
    padding: 12px 30px;
    border: none;
    border-radius: 8px;
    font-size: 1rem;
    font-weight: bold;
    cursor: pointer;
    transition: all 0.3s ease;
    margin-bottom: 15px;
}

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

.btn-primary:hover {
    background: #5568d3;
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(102, 126, 234, 0.4);
}

.btn-secondary {
    background: #764ba2;
    color: white;
}

.btn-secondary:hover {
    background: #63408a;
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(118, 75, 162, 0.4);
}

.status-message {
    padding: 15px;
    border-radius: 8px;
    margin-top: 10px;
    font-family: 'Courier New', monospace;
    font-size: 0.9rem;
    min-height: 50px;
}

.status-message.success {
    background: #d4edda;
    border: 1px solid #c3e6cb;
    color: #155724;
}

.status-message.error {
    background: #f8d7da;
    border: 1px solid #f5c6cb;
    color: #721c24;
}

.status-message.loading {
    background: #fff3cd;
    border: 1px solid #ffeaa7;
    color: #856404;
}

.info-section {
    background: #e9ecef;
    padding: 20px;
    border-radius: 10px;
    margin-bottom: 20px;
}

.info-section ul {
    list-style: none;
    padding-left: 0;
}

.info-section li {
    padding: 10px 0;
    border-bottom: 1px solid #dee2e6;
    color: #495057;
}

.info-section li:last-child {
    border-bottom: none;
}

.info-section li::before {
    content: "✓ ";
    color: #667eea;
    font-weight: bold;
    margin-right: 10px;
}

footer {
    text-align: center;
    padding-top: 20px;
    border-top: 2px solid #e9ecef;
    color: #666;
}

footer p {
    font-size: 0.9rem;
}

@media (max-width: 600px) {
    .container {
        padding: 20px;
    }

    h1 {
        font-size: 2rem;
    }

    .subtitle {
        font-size: 1rem;
    }
}