/* Reset and Base Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --primary-gradient: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    --primary-color: #667eea;
    --primary-dark: #5568d3;
    --secondary-color: #f3f4f6;
    --text-primary: #1f2937;
    --text-secondary: #6b7280;
    --text-light: #9ca3af;
    --border-color: #e5e7eb;
    --success-color: #10b981;
    --danger-color: #ef4444;
    --bg-white: #ffffff;
    --bg-gray: #f9fafb;
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1);
    --border-radius: 12px;
    --transition: all 0.3s ease;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
    padding: 20px;
    color: var(--text-primary);
    line-height: 1.6;
}

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

/* Header */
.header {
    text-align: center;
    margin-bottom: 40px;
    color: white;
}

.logo {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 12px;
    margin-bottom: 12px;
}

.logo h1 {
    font-size: 2.5rem;
    font-weight: 700;
    letter-spacing: -0.5px;
}

.subtitle {
    font-size: 1.125rem;
    opacity: 0.9;
    font-weight: 300;
}

/* Main Content */
.main-content {
    background: var(--bg-white);
    border-radius: var(--border-radius);
    padding: 32px;
    box-shadow: var(--shadow-xl);
    margin-bottom: 20px;
}

/* Input Section */
.input-section {
    margin-bottom: 32px;
}

.input-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 12px;
}

.input-header label {
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-primary);
}

.clear-btn {
    display: flex;
    align-items: center;
    gap: 6px;
    background: none;
    border: none;
    color: var(--text-secondary);
    cursor: pointer;
    padding: 6px 12px;
    border-radius: 6px;
    font-size: 0.875rem;
    transition: var(--transition);
}

.clear-btn:hover {
    background: var(--secondary-color);
    color: var(--text-primary);
}

textarea {
    width: 100%;
    padding: 16px;
    border: 2px solid var(--border-color);
    border-radius: var(--border-radius);
    font-family: inherit;
    font-size: 0.95rem;
    resize: vertical;
    transition: var(--transition);
    min-height: 180px;
}

textarea:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
}

textarea::placeholder {
    color: var(--text-light);
}

/* Buttons */
.action-buttons {
    display: flex;
    gap: 12px;
    margin-top: 16px;
}

.btn {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 12px 24px;
    border: none;
    border-radius: var(--border-radius);
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    font-family: inherit;
}

.btn-primary {
    background: var(--primary-gradient);
    color: white;
    flex: 1;
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.btn-primary:active {
    transform: translateY(0);
}

.btn-secondary {
    background: var(--secondary-color);
    color: var(--text-primary);
    flex: 0 0 auto;
}

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

.btn-icon {
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 8px 16px;
    background: var(--secondary-color);
    border: none;
    border-radius: 8px;
    color: var(--text-secondary);
    cursor: pointer;
    font-size: 0.875rem;
    font-weight: 500;
    transition: var(--transition);
    font-family: inherit;
}

.btn-icon:hover {
    background: var(--border-color);
    color: var(--text-primary);
}

/* Results Section */
.results-section {
    margin-bottom: 32px;
}

.results-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 16px;
    flex-wrap: wrap;
    gap: 12px;
}

.results-title {
    display: flex;
    align-items: center;
    gap: 12px;
}

.results-title h2 {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-primary);
}

.count-badge {
    background: var(--primary-gradient);
    color: white;
    padding: 4px 12px;
    border-radius: 20px;
    font-size: 0.875rem;
    font-weight: 600;
}

.results-actions {
    display: flex;
    gap: 8px;
}

.results-content {
    background: var(--bg-gray);
    border: 2px solid var(--border-color);
    border-radius: var(--border-radius);
    padding: 20px;
    min-height: 200px;
}

.empty-state {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 40px 20px;
    text-align: center;
}

.empty-state svg {
    margin-bottom: 16px;
}

.empty-state p {
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--text-secondary);
    margin-bottom: 4px;
}

.empty-state span {
    font-size: 0.875rem;
    color: var(--text-light);
}

.domain-list {
    display: grid;
    gap: 8px;
}

.domain-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 12px 16px;
    background: white;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    transition: var(--transition);
}

.domain-item:hover {
    border-color: var(--primary-color);
    box-shadow: var(--shadow-sm);
}

.domain-name {
    font-family: 'Consolas', 'Monaco', monospace;
    font-size: 0.95rem;
    color: var(--text-primary);
    font-weight: 500;
}

.domain-actions {
    display: flex;
    gap: 4px;
}

.icon-btn {
    background: none;
    border: none;
    padding: 6px;
    cursor: pointer;
    color: var(--text-secondary);
    border-radius: 4px;
    transition: var(--transition);
    display: flex;
    align-items: center;
    justify-content: center;
}

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

/* Stats Section */
.stats-section {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 20px;
}

.stat-card {
    display: flex;
    align-items: center;
    gap: 16px;
    padding: 20px;
    background: white;
    border-radius: var(--border-radius);
    border: 1px solid var(--border-color);
    transition: var(--transition);
}

.stat-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-md);
}

.stat-icon {
    width: 48px;
    height: 48px;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.stat-content {
    flex: 1;
}

.stat-value {
    font-size: 1.875rem;
    font-weight: 700;
    color: var(--text-primary);
    line-height: 1;
    margin-bottom: 4px;
}

.stat-label {
    font-size: 0.875rem;
    color: var(--text-secondary);
    font-weight: 500;
}

/* Footer */
.footer {
    text-align: center;
    padding: 20px;
    color: white;
    font-size: 0.875rem;
    opacity: 0.9;
}

.footer a:hover {
    opacity: 1 !important;
    text-decoration: underline !important;
}

/* SEO Content Section */
.seo-content {
    background: var(--bg-white);
    border-radius: var(--border-radius);
    padding: 40px;
    box-shadow: var(--shadow-xl);
    margin-bottom: 20px;
    max-width: 1200px;
    margin-left: auto;
    margin-right: auto;
}

.seo-content article {
    color: var(--text-primary);
}

.seo-content h2 {
    font-size: 2rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 20px;
    padding-bottom: 12px;
    border-bottom: 3px solid var(--primary-color);
    background: var(--primary-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.seo-content h3 {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-top: 32px;
    margin-bottom: 16px;
}

.seo-content p {
    font-size: 1rem;
    line-height: 1.8;
    color: var(--text-secondary);
    margin-bottom: 16px;
}

.seo-content ul,
.seo-content ol {
    margin-left: 24px;
    margin-bottom: 20px;
}

.seo-content li {
    font-size: 1rem;
    line-height: 1.8;
    color: var(--text-secondary);
    margin-bottom: 12px;
}

.seo-content li strong {
    color: var(--text-primary);
}

.seo-content dl {
    margin-top: 20px;
}

.seo-content dt {
    font-size: 1.05rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-top: 20px;
    margin-bottom: 8px;
}

.seo-content dd {
    font-size: 1rem;
    line-height: 1.8;
    color: var(--text-secondary);
    margin-left: 20px;
    margin-bottom: 16px;
    padding-left: 16px;
    border-left: 3px solid var(--border-color);
}

.seo-content strong {
    font-weight: 600;
    color: var(--primary-color);
}

/* Toast Notification */
.toast {
    position: fixed;
    bottom: 30px;
    right: 30px;
    background: var(--text-primary);
    color: white;
    padding: 16px 24px;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-xl);
    display: flex;
    align-items: center;
    gap: 12px;
    font-weight: 500;
    transform: translateX(400px);
    transition: transform 0.3s ease;
    z-index: 1000;
}

.toast.show {
    transform: translateX(0);
}

.toast svg {
    flex-shrink: 0;
}

/* Responsive Design */
@media (max-width: 768px) {
    body {
        padding: 12px;
    }

    .logo h1 {
        font-size: 1.875rem;
    }

    .subtitle {
        font-size: 1rem;
    }

    .main-content {
        padding: 20px;
    }

    .input-header {
        flex-direction: column;
        align-items: flex-start;
        gap: 8px;
    }

    .action-buttons {
        flex-direction: column;
    }

    .btn-primary,
    .btn-secondary {
        flex: 1;
        width: 100%;
        justify-content: center;
    }

    .results-header {
        flex-direction: column;
        align-items: flex-start;
    }

    .results-actions {
        width: 100%;
    }

    .btn-icon {
        flex: 1;
        justify-content: center;
    }

    .stats-section {
        grid-template-columns: 1fr;
    }

    .domain-item {
        flex-direction: column;
        align-items: flex-start;
        gap: 8px;
    }

    .toast {
        right: 12px;
        bottom: 12px;
        left: 12px;
        transform: translateY(200px);
    }

    .toast.show {
        transform: translateY(0);
    }
}

@media (max-width: 768px) {
    .seo-content {
        padding: 24px;
    }

    .seo-content h2 {
        font-size: 1.5rem;
    }

    .seo-content h3 {
        font-size: 1.25rem;
    }

    .seo-content p,
    .seo-content li {
        font-size: 0.95rem;
    }
}

@media (max-width: 480px) {
    .logo {
        flex-direction: column;
        gap: 8px;
    }

    .logo h1 {
        font-size: 1.5rem;
    }

    .subtitle {
        font-size: 0.875rem;
    }

    textarea {
        font-size: 0.875rem;
        min-height: 150px;
    }

    .results-title h2 {
        font-size: 1.25rem;
    }

    .stat-value {
        font-size: 1.5rem;
    }

    .seo-content {
        padding: 20px;
    }

    .seo-content h2 {
        font-size: 1.25rem;
    }

    .seo-content h3 {
        font-size: 1.125rem;
    }

    .seo-content p,
    .seo-content li {
        font-size: 0.875rem;
    }

    .seo-content ul,
    .seo-content ol {
        margin-left: 16px;
    }

    .seo-content dd {
        margin-left: 8px;
        padding-left: 12px;
    }
}

/* Animations */
@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.domain-item {
    animation: fadeIn 0.3s ease;
}

/* Scrollbar Styling */
::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}

::-webkit-scrollbar-track {
    background: var(--secondary-color);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb {
    background: var(--text-light);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--text-secondary);
}