* {
    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;
    display: flex;
    flex-direction: column;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    background: white;
    border-radius: 12px;
    box-shadow: 0 10px 30px rgba(0,0,0,0.2);
    overflow: hidden;
    flex: 1;
}

.header {
    background: linear-gradient(135deg, #2c3e50 0%, #34495e 100%);
    color: white;
    padding: 30px;
    text-align: center;
}

.header h1 {
    font-size: 2.5em;
    margin-bottom: 10px;
}

.header p {
    opacity: 0.9;
    font-size: 1.1em;
}

.main-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    min-height: 600px;
}

.config-section {
    padding: 30px;
    border-right: 2px solid #ecf0f1;
}

.output-section {
    padding: 30px;
    background: #f8f9fa;
}

.section-title {
    font-size: 1.3em;
    font-weight: bold;
    margin-bottom: 20px;
    color: #2c3e50;
}

.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: bold;
    color: #34495e;
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 12px;
    border: 2px solid #bdc3c7;
    border-radius: 6px;
    font-size: 14px;
    transition: border-color 0.3s;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: #3498db;
}

.checkbox-group {
    display: flex;
    align-items: center;
    gap: 8px;
}

.checkbox-group input[type="checkbox"] {
    width: auto;
}

.btn {
    background: linear-gradient(135deg, #3498db 0%, #2980b9 100%);
    color: white;
    border: none;
    padding: 12px 24px;
    border-radius: 6px;
    font-size: 14px;
    cursor: pointer;
    margin: 5px;
    transition: transform 0.2s;
}

.btn:hover {
    transform: translateY(-2px);
}

.btn-generate {
    background: linear-gradient(135deg, #27ae60 0%, #229954 100%);
    width: 100%;
    margin-top: 20px;
}

.btn-copy {
    background: linear-gradient(135deg, #f39c12 0%, #e67e22 100%);
}

.btn-download {
    background: linear-gradient(135deg, #9b59b6 0%, #8e44ad 100%);
}

.output-area {
    width: 100%;
    height: 400px;
    font-family: 'Courier New', monospace;
    font-size: 12px;
    background: #2c3e50;
    color: #ecf0f1;
    border: none;
    border-radius: 6px;
    padding: 15px;
    resize: vertical;
}

.status {
    margin-top: 15px;
    padding: 10px;
    border-radius: 6px;
    text-align: center;
    font-weight: bold;
    display: none;
}

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

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

/* Footer */
.footer {
    background: #2c3e50;
    color: white;
    padding: 20px;
    text-align: center;
    margin-top: auto;
}

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

.footer-links {
    margin-top: 10px;
}

.footer-links a {
    color: #3498db;
    text-decoration: none;
    margin: 0 15px;
    transition: color 0.3s;
}

.footer-links a:hover {
    color: #ecf0f1;
}

/* Modal */
.modal {
    display: none;
    position: fixed;
    z-index: 1000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0,0,0,0.5);
}

.modal-content {
    background-color: white;
    margin: 15% auto;
    padding: 0;
    border-radius: 12px;
    width: 80%;
    max-width: 500px;
    box-shadow: 0 10px 30px rgba(0,0,0,0.3);
}

.modal-header {
    background: linear-gradient(135deg, #2c3e50 0%, #34495e 100%);
    color: white;
    padding: 20px;
    border-radius: 12px 12px 0 0;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.modal-body {
    padding: 20px;
}

.modal-body ul {
    margin: 15px 0;
    padding-left: 20px;
}

.modal-body li {
    margin: 8px 0;
}

.close {
    color: white;
    font-size: 28px;
    font-weight: bold;
    cursor: pointer;
    transition: color 0.3s;
}

.close:hover {
    color: #bdc3c7;
}

@media (max-width: 768px) {
    .main-content {
        grid-template-columns: 1fr;
    }
    
    .config-section {
        border-right: none;
        border-bottom: 2px solid #ecf0f1;
    }
    
    .header h1 {
        font-size: 2em;
    }
    
    .container {
        margin: 10px;
    }
    
    body {
        padding: 10px;
    }
}