:root {
    --primary-gradient: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    --accent-gradient: linear-gradient(45deg, #667eea, #764ba2);
    --success-color: #10b981;
    --danger-color: #ef4444;
    --warning-color: #f59e0b;
    --primary-blue: #667eea;
    --text-primary: #1f2937;
    --text-secondary: #6b7280;
    --bg-primary: #ffffff;
    --bg-secondary: #f9fafb;
    --bg-tertiary: #f3f4f6;
    --border-color: #e5e7eb;
    --border-hover: #d1d5db;
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px 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);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
    --border-radius: 12px;
    --border-radius-sm: 8px;
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

* {
    box-sizing: border-box;
}

.wpx-settings-wrap {
    background: var(--bg-secondary);
    margin: 20px 0 0 -20px;
    padding: 0;
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    color: var(--text-primary);
    line-height: 1.6;
}

.wpx-header {
    background: var(--primary-gradient);
    color: white;
    padding: 50px 40px;
    margin: 0 0 40px 0;
    border-radius: 0;
    position: relative;
    overflow: hidden;
}

.wpx-header::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%23ffffff' fill-opacity='0.05'%3E%3Ccircle cx='30' cy='30' r='4'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E") repeat;
    animation: float 20s infinite linear;
}

@keyframes float {
    0% { transform: translateX(0) translateY(0); }
    100% { transform: translateX(-60px) translateY(-60px); }
}

.wpx-main-title {
    color: white;
    font-size: clamp(2rem, 4vw, 2.5rem);
    margin: 0 0 15px 0;
    font-weight: 300;
    display: flex;
    align-items: center;
    gap: 20px;
    position: relative;
    z-index: 1;
}

.wpx-logo {
    background: rgba(255, 255, 255, 0.25);
    backdrop-filter: blur(10px);
    padding: 10px 18px;
    border-radius: var(--border-radius-sm);
    font-weight: 700;
    font-size: 0.8em;
    border: 1px solid rgba(255, 255, 255, 0.2);
    transition: var(--transition);
}

.wpx-logo:hover {
    background: rgba(255, 255, 255, 0.3);
    transform: translateY(-2px);
}

.wpx-subtitle {
    color: rgba(255, 255, 255, 0.9);
    font-size: 1.2em;
    margin: 0;
    font-weight: 300;
    position: relative;
    z-index: 1;
}

.wpx-form {
    background: var(--bg-primary);
    margin: 0 40px 40px 40px;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-lg);
    overflow: hidden;
    border: 1px solid var(--border-color);
    transition: var(--transition);
}

.wpx-form:hover {
    box-shadow: var(--shadow-xl);
    transform: translateY(-2px);
}

.wpx-settings-grid h2 {
    background: linear-gradient(135deg, var(--bg-secondary) 0%, var(--bg-tertiary) 100%);
    color: var(--text-primary);
    margin: 0;
    padding: 30px 40px 25px 40px;
    font-size: 1.4em;
    font-weight: 600;
    border-bottom: 2px solid var(--border-color);
    display: flex;
    align-items: center;
    gap: 12px;
    position: relative;
}

.wpx-settings-grid h2:before {
    content: "⚙️";
    font-size: 1.3em;
    filter: drop-shadow(0 2px 4px rgba(0,0,0,0.1));
}

.wpx-settings-grid h2::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 40px;
    right: 40px;
    height: 2px;
    background: var(--accent-gradient);
    transform: scaleX(0);
    transition: var(--transition);
}

.wpx-settings-grid h2:hover::after {
    transform: scaleX(1);
}

.wpx-section-description {
    color: var(--text-secondary);
    margin: 0 0 30px 0;
    padding: 0 40px 20px 40px;
    background: linear-gradient(135deg, var(--bg-secondary) 0%, var(--bg-tertiary) 100%);
    font-style: italic;
    border-bottom: 1px solid var(--border-color);
}

.wpx-settings-grid table {
    width: 100%;
    border-collapse: collapse;
}

.wpx-settings-grid th {
    background: transparent;
    padding: 30px 40px 20px 40px;
    text-align: left;
    font-weight: 600;
    color: var(--text-primary);
    width: 220px;
    vertical-align: top;
    font-size: 1.05em;
}

.wpx-settings-grid td {
    padding: 30px 40px 20px 25px;
    vertical-align: top;
}

.wpx-settings-grid tr {
    transition: var(--transition);
    border-bottom: 1px solid rgba(229, 231, 235, 0.5);
}

.wpx-settings-grid tr:hover {
    background: linear-gradient(90deg, rgba(102, 126, 234, 0.02) 0%, rgba(255, 255, 255, 0) 100%);
}

.wpx-field-container {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.wpx-toggle-switch {
    position: relative;
    display: inline-block;
    width: 64px;
    height: 36px;
}

.wpx-toggle-switch input {
    opacity: 0;
    width: 0;
    height: 0;
}

.wpx-slider {
    position: absolute;
    cursor: pointer;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, #d1d5db 0%, #9ca3af 100%);
    transition: var(--transition);
    border-radius: 36px;
    box-shadow: inset 0 2px 4px rgba(0, 0, 0, 0.1);
}

.wpx-slider:before {
    position: absolute;
    content: "";
    height: 28px;
    width: 28px;
    left: 4px;
    bottom: 4px;
    background: linear-gradient(135deg, #ffffff 0%, #f8fafc 100%);
    transition: var(--transition);
    border-radius: 50%;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.2);
}

input:checked + .wpx-slider {
    background: var(--accent-gradient);
    box-shadow: 0 0 20px rgba(102, 126, 234, 0.3);
}

input:checked + .wpx-slider:before {
    transform: translateX(28px);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.25);
}

.wpx-slider:hover {
    transform: scale(1.05);
}

.wpx-textarea, .wpx-input {
    width: 100%;
    max-width: 520px;
    padding: 14px 16px;
    border: 2px solid var(--border-color);
    border-radius: var(--border-radius-sm);
    font-size: 15px;
    font-family: inherit;
    transition: var(--transition);
    background: var(--bg-primary);
    color: var(--text-primary);
}

.wpx-textarea:focus, .wpx-input:focus {
    border-color: var(--primary-blue);
    outline: none;
    box-shadow: 0 0 0 4px rgba(102, 126, 234, 0.1);
    transform: translateY(-1px);
}

.wpx-textarea:hover, .wpx-input:hover {
    border-color: var(--border-hover);
}

.wpx-field-description {
    color: var(--text-secondary);
    font-size: 14px;
    margin: 8px 0 0 0;
    line-height: 1.5;
}

kbd {
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: 6px;
    padding: 4px 8px;
    font-size: 12px;
    font-family: 'SF Mono', Monaco, 'Cascadia Code', 'Roboto Mono', Consolas, 'Courier New', monospace;
    box-shadow: var(--shadow-sm);
    font-weight: 500;
}

.wpx-submit-container {
    padding: 35px 40px;
    background: linear-gradient(135deg, var(--bg-secondary) 0%, var(--bg-tertiary) 100%);
    border-top: 2px solid var(--border-color);
    position: relative;
}

.wpx-submit-container::before {
    content: '';
    position: absolute;
    top: 0;
    left: 40px;
    right: 40px;
    height: 2px;
    background: var(--accent-gradient);
    opacity: 0.6;
}

.wpx-save-button {
    background: var(--accent-gradient) !important;
    border: none !important;
    padding: 16px 35px !important;
    font-size: 16px !important;
    border-radius: var(--border-radius-sm) !important;
    font-weight: 600 !important;
    text-shadow: none !important;
    box-shadow: var(--shadow-md), 0 4px 20px rgba(102, 126, 234, 0.3) !important;
    transition: var(--transition) !important;
    cursor: pointer !important;
    position: relative !important;
    overflow: hidden !important;
}

.wpx-save-button::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
    transition: var(--transition);
}

.wpx-save-button:hover {
    transform: translateY(-3px) !important;
    box-shadow: var(--shadow-lg), 0 8px 30px rgba(102, 126, 234, 0.4) !important;
}

.wpx-save-button:hover::before {
    left: 100%;
}

.wpx-save-button:active {
    transform: translateY(-1px) !important;
}

/* Enhanced SEOPress Tags Styling */
.wpx-tags-container {
    background: var(--bg-primary);
    border-radius: var(--border-radius);
    overflow: hidden;
}

.wpx-tag-row {
    border: 2px solid var(--border-color);
    border-radius: var(--border-radius);
    margin-bottom: 25px;
    background: var(--bg-primary);
    transition: var(--transition);
    overflow: hidden;
    position: relative;
}

.wpx-tag-row::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 4px;
    height: 100%;
    background: var(--border-color);
    transition: var(--transition);
}

.wpx-tag-row.enabled {
    border-color: var(--success-color);
    box-shadow: 0 0 0 1px rgba(16, 185, 129, 0.1);
}

.wpx-tag-row.enabled::before {
    background: var(--success-color);
}

.wpx-tag-row.disabled {
    border-color: var(--danger-color);
    opacity: 0.75;
    box-shadow: 0 0 0 1px rgba(239, 68, 68, 0.1);
}

.wpx-tag-row.disabled::before {
    background: var(--danger-color);
}

.wpx-tag-row.enabled .wpx-preview-enabled {
    display: block;
}
.wpx-tag-row.enabled .wpx-preview-disabled {
    display: none;
}
.wpx-tag-row.disabled .wpx-preview-enabled {
    display: none;
}
.wpx-tag-row.disabled .wpx-preview-disabled {
    display: block;
}

.wpx-tag-header {
    background: linear-gradient(135deg, var(--bg-secondary) 0%, var(--bg-tertiary) 100%);
    padding: 20px 25px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-bottom: 1px solid var(--border-color);
}

.wpx-tag-title {
    margin: 0;
    color: var(--text-primary);
    font-size: 17px;
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 10px;
}

.wpx-remove-tag {
    background: var(--danger-color);
    color: white;
    border: none;
    border-radius: 50%;
    width: 34px;
    height: 34px;
    cursor: pointer;
    transition: var(--transition);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 16px;
    box-shadow: var(--shadow-sm);
}

.wpx-remove-tag:hover {
    background: #dc2626;
    transform: scale(1.1);
    box-shadow: var(--shadow-md);
}

.wpx-tag-content {
    padding: 25px;
}

.wpx-field-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 25px;
    margin-bottom: 20px;
}

.wpx-checkbox-col {
    display: flex;
    align-items: center;
}

.wpx-label {
    display: block;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 8px;
    font-size: 15px;
}

.wpx-help-text {
    color: var(--text-secondary);
    font-size: 13px;
    margin-top: 8px;
    display: block;
    line-height: 1.4;
}

.wpx-tag-preview {
    background: linear-gradient(135deg, var(--bg-secondary) 0%, var(--bg-tertiary) 100%);
    padding: 20px 25px;
    border-top: 1px solid var(--border-color);
}

.wpx-copyable {
    background: var(--bg-tertiary);
    padding: 6px 12px;
    border-radius: 6px;
    cursor: pointer;
    transition: var(--transition);
    border: 1px solid var(--border-color);
    font-family: 'SF Mono', Monaco, 'Cascadia Code', 'Roboto Mono', Consolas, monospace;
    font-size: 13px;
}

.wpx-copyable:hover {
    background: var(--primary-blue);
    color: white;
    border-color: var(--primary-blue);
    transform: translateY(-1px);
    box-shadow: var(--shadow-sm);
}

.wpx-copy-feedback {
    color: var(--success-color);
    font-size: 13px;
    opacity: 0;
    transition: opacity 0.3s ease;
    margin-left: 12px;
    font-weight: 500;
}

.wpx-add-button {
    margin-top: 25px;
    background: var(--success-color) !important;
    border-color: var(--success-color) !important;
    color: white !important;
    padding: 12px 24px !important;
    border-radius: var(--border-radius-sm) !important;
    font-weight: 600 !important;
    transition: var(--transition) !important;
    box-shadow: var(--shadow-sm) !important;
}

.wpx-add-button:hover {
    background: #059669 !important;
    transform: translateY(-2px) !important;
    box-shadow: var(--shadow-md) !important;
}

.wpx-help-box {
    background: linear-gradient(135deg, #eff6ff 0%, #dbeafe 100%);
    border: 2px solid #bfdbfe;
    border-radius: var(--border-radius);
    padding: 25px;
    margin-top: 35px;
    position: relative;
    overflow: hidden;
}

.wpx-help-box::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 4px;
    height: 100%;
    background: #3b82f6;
}

.wpx-help-box h3 {
    color: #1e40af;
    margin: 0 0 18px 0;
    display: flex;
    align-items: center;
    gap: 10px;
    font-weight: 600;
    font-size: 18px;
}

.wpx-field-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 15px;
}

.wpx-field-item {
    background: var(--bg-primary);
    padding: 15px;
    border-radius: var(--border-radius-sm);
    border-left: 4px solid var(--primary-blue);
    transition: var(--transition);
    box-shadow: var(--shadow-sm);
}

.wpx-field-item:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.wpx-field-item code {
    color: var(--primary-blue);
    font-weight: 600;
    font-family: 'SF Mono', Monaco, 'Cascadia Code', 'Roboto Mono', Consolas, monospace;
    background: rgba(102, 126, 234, 0.1);
    padding: 2px 6px;
    border-radius: 4px;
}

.wpx-field-item span {
    color: var(--text-secondary);
    font-size: 14px;
    margin-left: 12px;
}

/* Enhanced Page Picker */
.wpx-select-container select {
    min-width: 320px;
    max-width: 520px;
    padding: 12px 16px;
    font-size: 15px;
    line-height: 1.5;
    border: 2px solid var(--border-color);
    border-radius: var(--border-radius-sm);
    background: var(--bg-primary);
    color: var(--text-primary);
    transition: var(--transition);
    cursor: pointer;
}

.wpx-select-container select:focus {
    border-color: var(--primary-blue);
    outline: none;
    box-shadow: 0 0 0 4px rgba(102, 126, 234, 0.1);
}

.wpx-select-container select:hover {
    border-color: var(--border-hover);
}

.wpx-select-container optgroup {
    font-weight: 600;
    color: var(--text-primary);
    background: var(--bg-secondary);
    padding: 8px;
}

.wpx-select-container option {
    padding: 8px 12px;
    font-weight: normal;
    color: var(--text-primary);
    background: var(--bg-primary);
}

.wpx-select-container optgroup option {
    padding-left: 20px;
}

/* Responsive Design */
@media (max-width: 768px) {
    .wpx-header {
        padding: 30px 20px;
    }
    
    .wpx-form {
        margin: 0 20px 20px 20px;
    }
    
    .wpx-settings-grid th,
    .wpx-settings-grid td {
        padding: 20px;
    }
    
    .wpx-field-row {
        grid-template-columns: 1fr;
        gap: 15px;
    }
    
    .wpx-main-title {
        font-size: 1.8rem;
        flex-direction: column;
        gap: 15px;
        text-align: center;
    }
    
    .wpx-select-container select {
        min-width: 100%;
    }
}

/* Dark mode support */
@media (prefers-color-scheme: dark) {
    :root {
        --text-primary: #f9fafb;
        --text-secondary: #9ca3af;
        --bg-primary: #1f2937;
        --bg-secondary: #111827;
        --bg-tertiary: #374151;
        --border-color: #374151;
        --border-hover: #4b5563;
    }
}