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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 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;
    padding: 2.5rem;
    border-radius: 15px;
    box-shadow: 0 20px 40px rgba(0,0,0,0.1);
    width: 100%;
    max-width: 450px;
    animation: slideIn 0.5s ease-out;
}

@keyframes slideIn {
    from { opacity: 0; transform: translateY(30px); }
    to { opacity: 1; transform: translateY(0); }
}

h1 {
    text-align: center;
    margin-bottom: 2rem;
    color: #2c3e50;
    font-size: 2rem;
    font-weight: 700;
}

.form-group {
    margin-bottom: 1.5rem;
}

label {
    display: block;
    margin-bottom: 0.5rem;
    color: #555;
    font-weight: 600;
    font-size: 0.95rem;
}

input[type="text"], input[type="email"] {
    width: 100%;
    padding: 1rem;
    border: 2px solid #e1e8ed;
    border-radius: 8px;
    font-size: 1rem;
    transition: border-color 0.3s, box-shadow 0.3s;
    background: #fafbfc;
}

input[type="text"]:focus, input[type="email"]:focus {
    outline: none;
    border-color: #667eea;
    box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
    background: white;
}

.subdomain-preview {
    margin-top: 0.5rem;
    padding: 0.75rem;
    background: #f8f9fa;
    border-radius: 6px;
    color: #6c757d;
    font-size: 0.9rem;
    border-left: 3px solid #667eea;
}

button {
    width: 100%;
    padding: 1rem;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    border: none;
    border-radius: 8px;
    font-size: 1.1rem;
    font-weight: 600;
    cursor: pointer;
    transition: transform 0.2s, box-shadow 0.2s;
    position: relative;
}

button:hover:not(:disabled) {
    transform: translateY(-2px);
    box-shadow: 0 10px 20px rgba(102, 126, 234, 0.3);
}

button:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

.result {
    margin-top: 1.5rem;
    padding: 1rem;
    border-radius: 8px;
    display: none;
}

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

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

.success a {
    color: #155724;
    font-weight: 600;
}

.loading::after {
    content: '';
    position: absolute;
    right: 1rem;
    top: 50%;
    transform: translateY(-50%);
    width: 20px;
    height: 20px;
    border: 2px solid transparent;
    border-top: 2px solid white;
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    0% { transform: translateY(-50%) rotate(0deg); }
    100% { transform: translateY(-50%) rotate(360deg); }
}

@media (max-width: 600px) {
    .container { padding: 2rem; margin: 1rem; }
    h1 { font-size: 1.7rem; }
}