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

:root {
    --primary-color: #2563eb;
    --success-color: #10b981;
    --danger-color: #ef4444;
    --warning-color: #f59e0b;
    --dark-bg: #111827;
    --light-bg: #f9fafb;
    --card-bg: #ffffff;
    --text-primary: #111827;
    --text-secondary: #6b7280;
    --border-color: #e5e7eb;
    --shadow: 0 1px 3px 0 rgba(0, 0, 0, 0.1), 0 1px 2px 0 rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
}

html {
    height: 100%;
    overflow-x: hidden;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    background-attachment: fixed;
    min-height: 100%;
    margin: 0;
    padding: 0;
    color: var(--text-primary);
    overflow-x: hidden;
    -webkit-overflow-scrolling: touch;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 2rem;
    min-height: 100vh;
    position: relative;
}

header {
    text-align: center;
    color: white;
    margin-bottom: 3rem;
}

header h1 {
    font-size: 3rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
    text-shadow: 2px 2px 4px rgba(0,0,0,0.2);
}

.subtitle {
    font-size: 1.125rem;
    opacity: 0.95;
}

.search-section {
    background: var(--card-bg);
    border-radius: 1rem;
    padding: 2rem;
    box-shadow: var(--shadow-lg);
    margin-bottom: 2rem;
}

.search-container {
    position: relative;
    margin-bottom: 1rem;
}

#domainInput {
    width: 100%;
    padding: 1.25rem;
    font-size: 1.25rem;
    border: 2px solid var(--border-color);
    border-radius: 0.75rem;
    transition: all 0.3s ease;
    background: var(--light-bg);
}

#domainInput:focus {
    outline: none;
    border-color: var(--primary-color);
    background: white;
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

.search-status {
    position: absolute;
    right: 1.25rem;
    top: 50%;
    transform: translateY(-50%);
    font-size: 0.875rem;
    color: var(--text-secondary);
}

.info-bar {
    display: flex;
    justify-content: space-between;
    padding: 0.75rem;
    background: var(--light-bg);
    border-radius: 0.5rem;
    font-size: 0.875rem;
    color: var(--text-secondary);
}

.info-item {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.results-section {
    background: var(--card-bg);
    border-radius: 1rem;
    padding: 2rem;
    box-shadow: var(--shadow-lg);
    min-height: 400px;
}

.results-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 2rem;
    padding-bottom: 1rem;
    border-bottom: 2px solid var(--border-color);
}

.results-header h2 {
    font-size: 1.5rem;
    color: var(--text-primary);
}

.filter-buttons {
    display: flex;
    gap: 0.5rem;
}

.filter-btn {
    padding: 0.5rem 1rem;
    border: 1px solid var(--border-color);
    background: white;
    border-radius: 0.5rem;
    cursor: pointer;
    transition: all 0.2s ease;
    font-size: 0.875rem;
}

.filter-btn:hover {
    background: var(--light-bg);
}

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

.loading-indicator {
    display: none;
    align-items: center;
    justify-content: center;
    gap: 1rem;
    padding: 2rem;
    color: var(--text-secondary);
}

.loading-indicator.active {
    display: flex;
}

.spinner {
    width: 24px;
    height: 24px;
    border: 3px solid var(--border-color);
    border-top-color: var(--primary-color);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

.tld-sections {
    display: none;
}

.tld-sections.active {
    display: block;
}

.tld-section {
    margin-bottom: 2rem;
}

.tld-section h3 {
    font-size: 1.125rem;
    color: var(--text-secondary);
    margin-bottom: 1rem;
}

.domain-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
    gap: 0.75rem;
}

.domain-card-link {
    text-decoration: none;
    color: inherit;
    display: block;
}

.domain-card-link:hover {
    text-decoration: none;
}

.domain-card {
    padding: 0.875rem;
    border: 2px solid var(--border-color);
    border-radius: 0.5rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 0.5rem;
    min-width: 0;
    transition: all 0.2s ease;
    background: white;
    overflow: hidden;
    cursor: pointer;
}

.domain-card:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow);
}

.domain-card.available {
    border-color: var(--success-color);
    background: linear-gradient(135deg, rgba(16, 185, 129, 0.05) 0%, rgba(16, 185, 129, 0.1) 100%);
}

.domain-card.available:hover {
    border-color: var(--success-color);
    box-shadow: 0 4px 12px rgba(16, 185, 129, 0.25);
    transform: translateY(-3px);
}

.domain-card.taken {
    border-color: var(--danger-color);
    background: linear-gradient(135deg, rgba(239, 68, 68, 0.05) 0%, rgba(239, 68, 68, 0.1) 100%);
}

.domain-card.checking {
    border-color: var(--warning-color);
    background: linear-gradient(135deg, rgba(245, 158, 11, 0.05) 0%, rgba(245, 158, 11, 0.1) 100%);
    animation: pulse 1.5s ease-in-out infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.7; }
}

.domain-card.cached {
    position: relative;
}

.domain-card.cached::after {
    content: 'cached';
    position: absolute;
    top: 4px;
    right: 4px;
    font-size: 0.625rem;
    color: var(--text-secondary);
    background: var(--light-bg);
    padding: 0.125rem 0.25rem;
    border-radius: 0.25rem;
    z-index: 1;
}

.domain-name {
    font-weight: 500;
    font-size: 0.875rem;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    flex: 1;
    min-width: 0;
    display: flex;
    align-items: center;
}

.domain-status {
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    padding: 0.25rem 0.5rem;
    border-radius: 0.25rem;
    flex-shrink: 0;
    white-space: nowrap;
}

.domain-status.available {
    color: var(--success-color);
    background: rgba(16, 185, 129, 0.1);
}

.domain-status.taken {
    color: var(--danger-color);
    background: rgba(239, 68, 68, 0.1);
}

.domain-status.checking {
    color: var(--warning-color);
    background: rgba(245, 158, 11, 0.1);
}

.domain-status.error {
    color: var(--text-secondary);
    background: var(--light-bg);
}

.no-results {
    text-align: center;
    padding: 3rem;
    color: var(--text-secondary);
    font-size: 1.125rem;
}

.no-results.hidden {
    display: none;
}

footer {
    margin-top: 2rem;
    padding: 1.5rem;
    background: rgba(255, 255, 255, 0.95);
    border-radius: 1rem;
    box-shadow: var(--shadow);
}

.api-stats {
    margin-bottom: 1rem;
}

.api-stats h4 {
    font-size: 1rem;
    color: var(--text-secondary);
    margin-bottom: 0.5rem;
}

#apiStats {
    display: flex;
    gap: 2rem;
    font-size: 0.875rem;
    color: var(--text-secondary);
}

#apiStats strong {
    color: var(--text-primary);
    font-weight: 600;
}

.footer-note {
    text-align: center;
    font-size: 0.875rem;
    color: var(--text-secondary);
}

.premium-badge {
    background: linear-gradient(135deg, #fbbf24 0%, #f59e0b 100%);
    color: white;
    font-size: 0.625rem;
    padding: 0.125rem 0.375rem;
    border-radius: 0.25rem;
    margin-left: 0.5rem;
    flex-shrink: 0;
    white-space: nowrap;
}

@media (max-width: 768px) {
    body {
        background-attachment: scroll;
        background-size: cover;
        background-position: center;
    }
    
    .container {
        padding: 1rem;
        padding-bottom: 2rem;
    }
    
    header h1 {
        font-size: 2rem;
    }
    
    .search-status {
        position: static;
        transform: none;
        margin-top: 0.5rem;
        text-align: center;
        display: block;
    }
    
    #domainInput {
        padding: 1rem;
        font-size: 1rem;
    }
    
    .info-bar {
        flex-direction: column;
        gap: 0.5rem;
        align-items: center;
    }
    
    .domain-grid {
        grid-template-columns: 1fr;
        gap: 0.5rem;
    }
    
    .domain-card {
        padding: 0.75rem;
    }
    
    .results-header {
        flex-direction: column;
        gap: 1rem;
        align-items: flex-start;
    }
    
    #apiStats {
        flex-direction: column;
        gap: 0.5rem;
    }
}