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

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

.container {
    max-width: 800px;
    margin: 0 auto;
    padding: 20px;
}

header {
    text-align: center;
    padding: 40px 0;
    color: white;
}

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

header p {
    font-size: 1.2rem;
    opacity: 0.9;
}

.card {
    background: white;
    border-radius: 12px;
    padding: 30px;
    margin-bottom: 20px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
}

.card h2 {
    margin-bottom: 20px;
    color: #667eea;
}

.input-group {
    display: flex;
    align-items: center;
    background: #f5f5f5;
    border-radius: 8px;
    padding: 12px;
    margin-bottom: 10px;
}

.input-group input {
    flex: 1;
    border: none;
    background: transparent;
    font-size: 1.1rem;
    outline: none;
    padding: 5px;
}

.domain-suffix {
    color: #666;
    font-size: 1.1rem;
}

.status {
    margin: 10px 0;
    font-size: 0.9rem;
    min-height: 20px;
}

.status.available {
    color: #22c55e;
}

.status.taken {
    color: #ef4444;
}

button {
    width: 100%;
    padding: 14px;
    background: #667eea;
    color: white;
    border: none;
    border-radius: 8px;
    font-size: 1rem;
    cursor: pointer;
    transition: background 0.2s;
}

button:hover:not(:disabled) {
    background: #5a67d8;
}

button:disabled {
    background: #ccc;
    cursor: not-allowed;
}

.btn-secondary {
    background: #f5f5f5;
    color: #333;
    margin-top: 10px;
}

.btn-secondary:hover {
    background: #e5e5e5;
}

.hidden {
    display: none !important;
}

.token-display {
    background: #f0f9ff;
    border: 2px solid #667eea;
    border-radius: 8px;
    padding: 20px;
    margin: 20px 0;
}

.token {
    display: block;
    word-break: break-all;
    font-family: 'Courier New', monospace;
    font-size: 0.9rem;
    background: white;
    padding: 10px;
    border-radius: 4px;
    margin: 10px 0;
}

.fqdn-display {
    margin-top: 20px;
}

.fqdn-display code {
    display: block;
    font-size: 1.1rem;
    color: #667eea;
    margin-top: 5px;
}

.config-grid {
    display: grid;
    gap: 15px;
    margin: 20px 0;
}

.config-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    background: #f5f5f5;
    padding: 12px;
    border-radius: 6px;
}

.config-item label {
    font-weight: 600;
    color: #666;
}

.config-item code {
    font-family: 'Courier New', monospace;
    background: white;
    padding: 4px 8px;
    border-radius: 4px;
    max-width: 60%;
    overflow-x: auto;
}

.examples {
    margin-top: 30px;
}

.examples h3 {
    margin-bottom: 15px;
    color: #667eea;
}

.example {
    background: #f5f5f5;
    padding: 15px;
    border-radius: 8px;
    margin-bottom: 15px;
}

.example h4 {
    margin-bottom: 10px;
    color: #333;
}

.example ul {
    list-style: none;
}

.example li {
    padding: 5px 0;
    border-bottom: 1px solid #e5e5e5;
}

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

.example pre {
    background: #1a1a1a;
    color: #fff;
    padding: 15px;
    border-radius: 6px;
    overflow-x: auto;
    font-size: 0.85rem;
    margin: 10px 0;
}

.card.error {
    border-left: 4px solid #ef4444;
}

.card.error h2 {
    color: #ef4444;
}

footer {
    text-align: center;
    padding: 20px;
    color: white;
    opacity: 0.8;
}

@media (max-width: 600px) {
    header h1 {
        font-size: 1.8rem;
    }
    
    .card {
        padding: 20px;
    }
    
    .config-item {
        flex-direction: column;
        align-items: flex-start;
        gap: 5px;
    }
    
    .config-item code {
        max-width: 100%;
        width: 100%;
    }
}