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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    line-height: 1.6;
    color: #333;
    background: #f5f5f5;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

nav {
    background: #2c3e50;
    color: white;
    padding: 1rem 0;
    box-shadow: 0 2px 5px rgba(0,0,0,0.1);
}

nav h1 {
    display: inline-block;
}

nav h1 a {
    color: white;
    text-decoration: none;
}

#navMenu {
    float: right;
    margin-top: 5px;
}

#navMenu a, #navMenu button {
    color: white;
    text-decoration: none;
    margin-left: 20px;
    background: none;
    border: none;
    cursor: pointer;
    font-size: 16px;
}

main {
    padding: 40px 0;
}

.hero {
    text-align: center;
    padding: 40px 0;
    background: white;
    border-radius: 10px;
    margin-bottom: 30px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
}

.hero h2 {
    font-size: 2.5rem;
    margin-bottom: 15px;
    color: #2c3e50;
}

.domain-register {
    background: white;
    padding: 30px;
    border-radius: 10px;
    margin-bottom: 30px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
}

.search-box {
    display: flex;
    gap: 10px;
    margin: 20px 0;
}

.search-box input, .search-box select {
    flex: 1;
    padding: 12px;
    border: 2px solid #ddd;
    border-radius: 5px;
    font-size: 16px;
}

.search-box button {
    padding: 12px 30px;
    background: #3498db;
    color: white;
    border: none;
    border-radius: 5px;
    cursor: pointer;
    font-size: 16px;
    font-weight: bold;
}

.search-box button:hover {
    background: #2980b9;
}

#searchResult {
    margin: 20px 0;
    padding: 15px;
    border-radius: 5px;
}

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

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

#registerForm input {
    display: block;
    width: 100%;
    padding: 12px;
    margin: 10px 0;
    border: 2px solid #ddd;
    border-radius: 5px;
    font-size: 16px;
}

#registerForm button {
    width: 100%;
    padding: 15px;
    background: #27ae60;
    color: white;
    border: none;
    border-radius: 5px;
    cursor: pointer;
    font-size: 18px;
    font-weight: bold;
    margin-top: 15px;
}

#registerForm button:hover {
    background: #229954;
}

#paymentInfo {
    background: #fff3cd;
    border: 1px solid #ffc107;
    padding: 15px;
    margin: 15px 0;
    border-radius: 5px;
}

.features {
    background: white;
    padding: 30px;
    border-radius: 10px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
}

.feature-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 20px;
    margin-top: 20px;
}

.feature {
    padding: 20px;
    background: #f8f9fa;
    border-radius: 8px;
    text-align: center;
}

.auth-form {
    max-width: 400px;
    margin: 50px auto;
    background: white;
    padding: 40px;
    border-radius: 10px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
}

.auth-form h2 {
    margin-bottom: 20px;
    text-align: center;
}

.auth-form input {
    width: 100%;
    padding: 12px;
    margin: 10px 0;
    border: 2px solid #ddd;
    border-radius: 5px;
    font-size: 16px;
}

.auth-form button {
    width: 100%;
    padding: 15px;
    background: #3498db;
    color: white;
    border: none;
    border-radius: 5px;
    cursor: pointer;
    font-size: 18px;
    font-weight: bold;
    margin-top: 10px;
}

.auth-form button:hover {
    background: #2980b9;
}

.auth-form p {
    text-align: center;
    margin-top: 15px;
}

.admin-tabs {
    display: flex;
    gap: 10px;
    margin-bottom: 30px;
    flex-wrap: wrap;
}

.tab-btn {
    padding: 12px 24px;
    background: #ecf0f1;
    border: none;
    border-radius: 5px;
    cursor: pointer;
    font-size: 16px;
}

.tab-btn.active {
    background: #3498db;
    color: white;
}

.tab-content {
    display: none;
    background: white;
    padding: 30px;
    border-radius: 10px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
}

.tab-content.active {
    display: block;
}

.add-extension {
    display: flex;
    gap: 10px;
    margin-bottom: 20px;
}

.add-extension input {
    flex: 1;
    padding: 10px;
    border: 2px solid #ddd;
    border-radius: 5px;
}

.add-extension button {
    padding: 10px 20px;
    background: #27ae60;
    color: white;
    border: none;
    border-radius: 5px;
    cursor: pointer;
}

.extension-item, .payment-item, .user-item, .domain-item, .suspicious-item {
    padding: 15px;
    border: 1px solid #ddd;
    border-radius: 5px;
    margin: 10px 0;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.extension-item button, .payment-item button, .user-item button, .domain-item button, .suspicious-item button {
    padding: 8px 15px;
    margin-left: 5px;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    font-size: 14px;
}

.btn-danger {
    background: #e74c3c;
    color: white;
}

.btn-success {
    background: #27ae60;
    color: white;
}

.btn-warning {
    background: #f39c12;
    color: white;
}

.btn-info {
    background: #3498db;
    color: white;
}

.security-settings {
    background: #f8f9fa;
    padding: 20px;
    border-radius: 8px;
    margin-bottom: 20px;
}

.security-settings label {
    display: block;
    margin: 10px 0 5px;
    font-weight: bold;
}

.security-settings input {
    padding: 8px;
    border: 2px solid #ddd;
    border-radius: 5px;
    margin-bottom: 10px;
}

.security-settings button {
    padding: 10px 20px;
    background: #27ae60;
    color: white;
    border: none;
    border-radius: 5px;
    cursor: pointer;
    margin-top: 10px;
}

#userDomains {
    background: white;
    padding: 30px;
    border-radius: 10px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
}

.domain-card {
    padding: 20px;
    border: 2px solid #ddd;
    border-radius: 8px;
    margin: 15px 0;
}

.domain-card h4 {
    margin-bottom: 10px;
    color: #2c3e50;
}

.domain-card p {
    margin: 5px 0;
    color: #666;
}

footer {
    background: #2c3e50;
    color: white;
    text-align: center;
    padding: 20px 0;
    margin-top: 40px;
}

.alert {
    padding: 15px;
    border-radius: 5px;
    margin: 15px 0;
}

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

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

.alert-warning {
    background: #fff3cd;
    color: #856404;
    border: 1px solid #ffc107;
}

@media (max-width: 768px) {
    .search-box {
        flex-direction: column;
    }
    
    #navMenu {
        float: none;
        margin-top: 15px;
    }
    
    .add-extension {
        flex-direction: column;
    }
        }