:root {
    --primary-color: #4F46E5;
    --primary-hover: #4338CA;
    --secondary-color: #6B7280;
    --success-color: #10B981;
    --error-color: #EF4444;
    --background: #F9FAFB;
    --card-background: #FFFFFF;
    --text-primary: #111827;
    --text-secondary: #6B7280;
    --border-color: #E5E7EB;
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    background: var(--background);
    color: var(--text-primary);
    line-height: 1.6;
}

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

.navbar {
    background: var(--card-background);
    border-bottom: 1px solid var(--border-color);
    padding: 15px 0;
    position: sticky;
    top: 0;
    z-index: 100;
}

.navbar .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.nav-brand h1 {
    font-size: 24px;
    color: var(--primary-color);
}

.nav-brand a {
    text-decoration: none;
}

.nav-links {
    display: flex;
    gap: 15px;
    align-items: center;
}

.nav-links a {
    text-decoration: none;
    color: var(--text-primary);
    padding: 8px 16px;
    border-radius: 6px;
    transition: background 0.2s;
}

.nav-links a:hover {
    background: var(--background);
}

.user-email {
    color: var(--text-secondary);
    font-size: 14px;
    margin-right: 10px;
}

.btn-primary, .btn-secondary, .btn-large {
    padding: 10px 20px;
    border: none;
    border-radius: 6px;
    cursor: pointer;
    font-size: 14px;
    font-weight: 500;
    text-decoration: none;
    display: inline-block;
    transition: all 0.2s;
}

.btn-primary {
    background: var(--primary-color);
    color: white;
}

.btn-primary:hover {
    background: var(--primary-hover);
}

.btn-secondary {
    background: var(--secondary-color);
    color: white;
}

.btn-secondary:hover {
    background: #4B5563;
}

.btn-large {
    padding: 14px 28px;
    font-size: 16px;
}

.btn-full {
    width: 100%;
}

.hero {
    padding: 80px 0;
    text-align: center;
}

.hero h1 {
    font-size: 48px;
    margin-bottom: 20px;
}

.hero p {
    font-size: 20px;
    color: var(--text-secondary);
    margin-bottom: 30px;
}

.hero-buttons {
    display: flex;
    gap: 15px;
    justify-content: center;
}

.features {
    padding: 60px 0;
    background: var(--card-background);
}

.features h2 {
    text-align: center;
    font-size: 36px;
    margin-bottom: 50px;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 30px;
}

.feature-card {
    text-align: center;
    padding: 30px;
}

.feature-icon {
    font-size: 48px;
    margin-bottom: 15px;
}

.feature-card h3 {
    margin-bottom: 10px;
}

.feature-card p {
    color: var(--text-secondary);
}

.cta {
    padding: 80px 0;
    text-align: center;
}

.cta h2 {
    font-size: 36px;
    margin-bottom: 15px;
}

.cta p {
    font-size: 18px;
    color: var(--text-secondary);
    margin-bottom: 30px;
}

footer {
    background: var(--card-background);
    border-top: 1px solid var(--border-color);
    padding: 30px 0;
    text-align: center;
    color: var(--text-secondary);
}

.auth-section {
    padding: 60px 0;
    min-height: calc(100vh - 200px);
    display: flex;
    align-items: center;
}

.auth-box {
    max-width: 450px;
    margin: 0 auto;
    background: var(--card-background);
    padding: 40px;
    border-radius: 12px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
}

.auth-box h2 {
    margin-bottom: 10px;
}

.auth-subtitle {
    color: var(--text-secondary);
    margin-bottom: 30px;
}

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

.form-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: 500;
}

.form-group input,
.form-group select {
    width: 100%;
    padding: 12px;
    border: 1px solid var(--border-color);
    border-radius: 6px;
    font-size: 14px;
}

.form-group input:focus,
.form-group select:focus {
    outline: none;
    border-color: var(--primary-color);
}

.form-group small {
    display: block;
    margin-top: 5px;
    color: var(--text-secondary);
    font-size: 12px;
}

.auth-footer {
    text-align: center;
    margin-top: 20px;
    color: var(--text-secondary);
}

.auth-footer a {
    color: var(--primary-color);
    text-decoration: none;
}

.error-message {
    background: #FEE2E2;
    color: var(--error-color);
    padding: 12px;
    border-radius: 6px;
    margin-bottom: 20px;
}

.success-message {
    background: #D1FAE5;
    color: var(--success-color);
    padding: 12px;
    border-radius: 6px;
    margin-bottom: 20px;
}

.dashboard-section {
    padding: 40px 0;
    min-height: calc(100vh - 100px);
}

.dashboard-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 30px;
}

.dashboard-header h2 {
    font-size: 32px;
}

.card {
    background: var(--card-background);
    padding: 25px;
    border-radius: 12px;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.05);
    margin-bottom: 20px;
}

.subdomains-list {
    display: grid;
    gap: 20px;
}

.subdomain-card {
    background: var(--card-background);
    padding: 25px;
    border-radius: 12px;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.05);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.subdomain-info h3 {
    margin-bottom: 5px;
    color: var(--primary-color);
}

.subdomain-info p {
    color: var(--text-secondary);
    font-size: 14px;
}

.subdomain-actions {
    display: flex;
    gap: 10px;
}

.input-with-suffix {
    display: flex;
    align-items: center;
    border: 1px solid var(--border-color);
    border-radius: 6px;
    overflow: hidden;
}

.input-with-suffix input {
    border: none;
    flex: 1;
}

.input-suffix {
    padding: 12px;
    background: var(--background);
    color: var(--text-secondary);
    font-size: 14px;
}

.form-buttons {
    display: flex;
    gap: 10px;
}

.form-buttons button {
    flex: 1;
}

.loading {
    text-align: center;
    padding: 40px;
    color: var(--text-secondary);
}

.modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
}

.modal-content {
    background: var(--card-background);
    border-radius: 12px;
    max-width: 800px;
    width: 90%;
    max-height: 90vh;
    overflow-y: auto;
}

.modal-header {
    padding: 25px;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.modal-header h3 {
    margin: 0;
}

.modal-close {
    background: none;
    border: none;
    font-size: 28px;
    cursor: pointer;
    color: var(--text-secondary);
    padding: 0;
    width: 30px;
    height: 30px;
    line-height: 1;
}

.modal-body {
    padding: 25px;
}

.form-row {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 15px;
}

.dns-record-item {
    background: var(--background);
    padding: 15px;
    border-radius: 6px;
    margin-bottom: 10px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.dns-record-info {
    flex: 1;
}

.dns-record-info strong {
    display: block;
    margin-bottom: 5px;
    color: var(--primary-color);
}

.dns-record-info span {
    color: var(--text-secondary);
    font-size: 14px;
}

.dns-record-actions button {
    background: var(--error-color);
    color: white;
    border: none;
    padding: 8px 16px;
    border-radius: 6px;
    cursor: pointer;
    font-size: 12px;
}

.dns-record-actions button:hover {
    background: #DC2626;
}

.status-badge {
    display: inline-block;
    padding: 4px 12px;
    border-radius: 12px;
    font-size: 12px;
    font-weight: 500;
}

.status-active {
    background: #D1FAE5;
    color: var(--success-color);
}

.status-inactive {
    background: #FEE2E2;
    color: var(--error-color);
}

@media (max-width: 768px) {
    .hero h1 {
        font-size: 32px;
    }
    
    .hero-buttons {
        flex-direction: column;
    }
    
    .dashboard-header {
        flex-direction: column;
        gap: 15px;
    }
    
    .subdomain-card {
        flex-direction: column;
        gap: 15px;
        align-items: flex-start;
    }
    
    .form-buttons {
        flex-direction: column;
    }
}